CN114719706B - Rear headlight key assembly size gauge with matching function and detection method - Google Patents
Rear headlight key assembly size gauge with matching function and detection method Download PDFInfo
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/0025—Measuring of vehicle parts
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/0002—Arrangements for supporting, fixing or guiding the measuring instrument or the object to be measured
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/14—Measuring arrangements characterised by the use of mechanical techniques for measuring distance or clearance between spaced objects or spaced apertures
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention discloses a rear headlight key assembly dimension gauge with a matching function and a detection method, wherein the front face construction method of the rear headlight key assembly dimension gauge is optimized to have the matching detection function, the three groups of related geometric dimensions with a matching relation can be directly measured, and the welding dimension precision of a side wall assembly at the periphery of a first group of dimensions, namely the rear headlight, can be independently measured by using the rear headlight key assembly dimension gauge and is consistent with the prior art; the second group of dimensions, namely the step difference of the boundary between the parts of the rear headlight environment parts, can be directly measured by using the matching function of the rear headlight key assembly dimension gauge; the third group of sizes, namely the opening degree and the installation posture of the back door, can be simultaneously used through the back headlight key assembly size checking fixture and the back door opening degree checking fixture, and the matching function of the back headlight key assembly size checking fixture is directly realized.
Description
Technical Field
The invention discloses a car rear headlight key assembly size gauge with a matching function, belongs to the technical field of car rear headlight gauges, and particularly discloses a rear headlight key assembly size gauge with a matching function and a detection method.
Background
The dimensional accuracy of the gap surface difference between the exterior parts has a great influence on the appearance quality of the car, and is the core content of the appearance quality evaluation standard. In order to ensure the gap surface difference between the exterior parts, the welding geometric dimension precision and the stability of the white car body of the car are required to be measured and controlled. The welding key assembly size Gauge (Check Gauge) is a common tool for measuring the geometric size precision and stability of welding of a white car body. For example, in order to ensure the clearance surface difference between the rear headlight and the environmental components (including side walls, back doors, back bumpers, etc.), a rear headlight key assembly dimension gauge needs to be designed and manufactured to measure the welding geometric dimension precision and stability of the rear headlight environmental components. In popular terms, a standard rear headlight is designed and manufactured, and the back surface of the standard rear headlight has the same positioning and mounting mode as a real object of the rear headlight, but the front surface of the headlight is replaced by an extension surface of an environment piece, as shown in fig. 1; and then, after the key assembly size gauge for the rear headlight is assembled on the white vehicle body, the welding geometric size precision and stability of the parts (the rear part of the side wall and the taillight seat board) related to the side wall assembly can be evaluated by measuring the gap surface difference between the key assembly size gauge and the environment part, and the gap surface difference and stability of the parts related to the back door can be evaluated. The technical scheme has three groups of associated geometric dimensions with matching relations to be controlled: firstly, the dimensional accuracy of a side wall assembly at the periphery of a rear headlight; secondly, opening and installation posture of the back door; thirdly, matching section difference of boundary lines between parts; the prior art is respectively controlled: the gap surface difference of environmental parts (side wall assemblies and parts of the back door) is detected by using a key assembly size detection tool of the rear headlight, the opening and the posture of the back door are detected by using an opening detection tool of the back door, and the section difference of a boundary line between parts is measured by assembling real parts. The key assembly size of the headlight in the prior art has no matching function with the opening degree detection tool of the back door, and can only be matched with the back door, because the size of the back door is in a large error and the stability can not be controlled, the mutual matching conditions of the three groups of related geometric sizes with matching relation also need to be indirectly evaluated by means of 3D measurement and the like after the detection tool is used, the evaluation means of the matching relation are not visual, the cost is high, the efficiency is low, the accuracy is low, and meanwhile, the following defects are also caused: the technical scheme is an independent subsystem, which can solve the problem of measurement of welding dimensional accuracy of an environment piece related to a rear headlight, namely the problem of measurement of clearance surface difference between the rear headlight and the environment piece, but because the independent subsystem is an independent and non-related measurement evaluation mode, the evaluation mode cannot independently solve the problem of deviation caused by the influence of the whole vehicle assembly environment on the subsystem, and three groups of related geometric dimensions with matching relation are needed to be controlled for the clearance surface difference between the rear headlight and the environment piece: firstly, the dimensional accuracy of the side wall assembly around the rear headlight. And secondly, opening and installation posture of the back door. The technical scheme can only solve the first problem, namely the dimensional accuracy of the side wall assembly around the rear headlight, but cannot solve the two latter problems, can not evaluate the influence of the opening degree and the installation posture of the back door on the gap surface difference of the relevant parts, and can not evaluate the matching step difference of the boundary between the parts of the rear headlight environment parts.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention provides a rear headlight key assembly dimension gauge with a matching function and a detection method, wherein the front face construction method of the rear headlight key assembly dimension gauge is optimized to have the matching detection function, the three groups of related geometric dimensions with a matching relation can be directly measured, and the welding dimension precision of a side wall assembly on the periphery of a first group of dimensions, namely the rear headlight, can be independently measured by using the rear headlight key assembly dimension gauge, and is consistent with the prior art; the second group of dimensions, namely the step difference of the boundary between the parts of the rear headlight environment parts, can be directly measured by using the matching function of the rear headlight key assembly dimension gauge; the third group of sizes, namely the opening degree and the installation posture of the back door, can be simultaneously used through the back headlight key assembly size checking fixture and the back door opening degree checking fixture, and the matching function of the back headlight key assembly size checking fixture is directly realized.
The invention discloses a key assembly size gauge with a matching function for a rear headlight, which comprises a rear headlight gauge, wherein the positioning and mounting structure of the back surface of the rear headlight gauge is the same as that of an actual rear headlight, the front surface of the rear headlight gauge comprises a side wall outer plate extension surface, a rear door extension surface and a rear bumper extension surface, the side wall outer plate extension surface is provided with a side wall outer plate gap detection reference surface for detecting welding size precision between the rear headlight and the side wall outer plate, the rear door extension surface is provided with a rear door gap detection reference surface for detecting welding size precision between the rear headlight and the rear door, and the rear bumper extension surface is provided with a rear bumper gap detection reference surface for detecting welding size precision between the rear headlight and the rear bumper; the back door extension surface is also provided with gap surface difference matching surfaces for detecting the opening degree and the installation posture of the back door, the back door extension surface comprises a plurality of sections of back door gap detection reference surfaces and gap surface difference matching surfaces, the back door gap detection reference surfaces and the gap surface difference matching surfaces are arranged at intervals, the width L1 of each section of back door gap detection reference surface is 25mm-50mm, the width L2 of each section of gap surface difference matching surface is 25mm-50mm, the height of each section of back door gap detection reference surface is lower than or higher than the height of each section of gap surface difference matching surface, and the gap surface difference detection reference surfaces and the gap surface on the back door are coplanar.
In a preferred embodiment of the present invention, the gap surface difference matching surface on the extension surface of the back door is a boss or a groove provided on the extension surface of the back door.
In a preferred embodiment of the present invention, the first level difference matching surface is formed by a third level difference matching ridge line L3 and a fourth level difference matching ridge line L4, the third level difference matching ridge line L3 is an intersection line formed by the tangential extension of the side wall outer plate along the parting ridge line and the side wall outer plate gap detection reference surface, and the fourth level difference matching ridge line L4 is an intersection line formed by the tangential extension of the back door along the parting ridge line and the back door gap detection reference surface.
In a preferred embodiment of the present invention, the second level difference matching surface is formed by a fifth level difference matching ridge line L5 and a sixth component level difference matching ridge line L6, the fifth level difference matching ridge line L5 is an intersection line formed by the rear bumper extending tangentially along the parting ridge line and the rear bumper gap detection reference surface, and the sixth component level difference matching ridge line L6 is an intersection line formed by the rear door extending tangentially along the parting ridge line and the rear door gap detection reference surface.
In a preferred embodiment of the invention, the first step matching surface is tangent to the side body outer panel gap detection reference surface and the back door gap detection reference surface at the parting joint, and the second step matching surface is tangent to the rear bumper gap detection reference surface and the back door gap detection reference surface at the parting joint.
The invention also discloses a method for detecting the key assembly size of the rear headlight, which comprises a rear headlight key assembly size detection tool with a matching function;
s1, mounting a key assembly size gauge with a matching function for a car rear headlight between a side wall outer plate, a back door and a back bumper;
s2, detecting welding dimensional accuracy between a rear headlight and the side wall outer plate, welding dimensional accuracy between the rear headlight and the back door and welding dimensional accuracy between the rear headlight and the back bumper based on a side wall outer plate gap detection reference surface, a back door gap detection reference surface and a back bumper gap detection reference surface on the gauge;
s3, detecting the level difference of a boundary line between the side wall outer plate and the back door based on a first level difference matching surface on the detection tool, and detecting the level difference of the boundary line between the rear bumper extension and the back door based on a second level difference matching surface on the detection tool;
s4, detecting the opening degree and the installation posture of the back door based on the clearance surface difference matching surface on the gauge.
In a preferred embodiment of the present invention, in S2, a clearance surface difference gauge is used to detect an actual measurement surface difference between the gauge and the side wall assembly, and a feeler gauge is used to detect an actual measurement clearance between the gauge and the side wall assembly, with reference to a side wall outer plate clearance detection reference surface on the gauge; acquiring a tolerance zone of a standard face difference and a tolerance zone of a standard gap at a detection position based on a body-in-white tolerance table; judging whether the actual measured surface difference and the actual measured gap fall in a tolerance zone of the standard surface difference and a tolerance zone of the standard gap, if so, judging that the welding precision of the side wall assembly is qualified, and if so, judging that the welding precision of the side wall assembly is unqualified, and adjusting a clamp;
detecting the actual measurement surface difference between the gauge and the back door by using a clearance surface difference gauge and detecting the actual measurement clearance between the gauge and the back door by using a feeler gauge by taking the back door clearance detection reference surface on the gauge as a reference; acquiring a tolerance zone of a standard face difference and a tolerance zone of a standard gap at a detection position based on a body-in-white tolerance table; judging whether the actual measured surface difference and the actual measured gap fall in a tolerance zone of the standard surface difference and a tolerance zone of the standard gap, if so, judging that the welding precision of the back door is qualified, and if so, judging that the welding precision of the back door is unqualified, and adjusting a clamp;
detecting the actual measurement surface difference between the gauge and the rear bumper by using a clearance surface difference gauge and detecting the actual measurement clearance between the gauge and the rear bumper by using a feeler gauge by taking the rear bumper clearance detection reference surface on the gauge as a reference; acquiring a tolerance zone of a standard face difference and a tolerance zone of a standard gap at a detection position based on a body-in-white tolerance table; judging whether the actual measurement surface difference and the actual measurement gap fall within a tolerance zone of the standard surface difference and a tolerance zone of the standard gap, if so, judging that the welding precision of the rear bumper is qualified, and if so, judging that the welding precision of the rear bumper is unqualified, and adjusting a clamp.
In a preferred embodiment of the invention, in S3, the edge line of the first step matching surface and the edge line of the second step matching surface on the gauge are used as datum lines, and a small steel plate ruler is used for comparing the actual gap between the parting line of the back door and the side wall assembly and the parting line of the back door and the rear bumper and the edge line on the gauge; and acquiring a tolerance zone of the level difference of the detection position based on the whole vehicle appearance clearance surface difference standard, judging whether the actual staggered joint distance falls within the tolerance zone of the level difference, if so, judging that the mounting precision of the rear bumper and the back door is qualified, and if so, judging that the mounting precision of the rear bumper and the back door is unqualified.
In a preferred embodiment of the present invention, in S4, the key assembly dimension gauge of the rear headlight with the matching function and the opening gauge of the back door are simultaneously mounted on the white car body, and the difference value and the gap value of the gap face difference matching face on the key assembly dimension gauge of the rear headlight with the matching function and the detection face on the opening gauge of the back door are measured; theoretically, a gap surface difference matching surface on the rear headlight key assembly size gauge is flush with a detection surface on the back door opening gauge, the surface difference value is zero, and the gap is a standard gap of 3mm or 5mm; and subtracting the theoretical value from the actual measured value obtained by detection to obtain the compensation value of the face difference and the gap.
In a preferred embodiment of the invention, in S1, when the welding dimensional accuracy of the peripheral side wall assembly of the rear headlight is measured, the measured value in S1 is calibrated by using the compensation value of the face difference and the gap obtained in S4, and when the compensation value of the face difference and the gap is larger than 1.5mm, the installation posture of the back door is unqualified, namely the accuracy of the installation points and the faces of the back door on the vehicle body is out of tolerance, and the installation points and the faces are adjusted by adjusting the tool clamp and then measured by using the detecting tool.
The beneficial effects of the invention are as follows: the invention aims at solving the first problem, namely the dimensional accuracy of the side wall assembly around the rear headlight, which is the first problem, namely the opening degree and the installation posture of the rear door, and the matching section difference of the boundary line between the parts of the rear headlight environment part can only be indirectly evaluated by means of other detecting tools, 3D measurement and the like. The method has the advantages that the method has the matching detection function, and the three groups of related geometric dimensions with the matching relation can be directly measured; the welding size precision of the first group of sizes, namely the side wall assemblies around the rear headlight, can be independently measured by using the rear headlight key assembly size gauge, and is consistent with the prior art; the second group of dimensions, namely the step difference of the boundary between the parts of the rear headlight environment parts, can be directly measured by using the matching function of the rear headlight key assembly dimension gauge; the third group size is that opening and the installation gesture of back door can examine utensil, back door opening through back headlight key assembly size and examine utensil and use simultaneously, and the matching function through back headlight key assembly size examines utensil directly realizes, and it has and makes the measurement directly perceived, with low costs, efficient, advantage that the precision is high.
Drawings
FIG. 1 is a schematic illustration of a prior art rear headlamp gauge;
FIG. 2 is a schematic diagram of a key assembly size gauge with matching function for a rear headlight according to the present invention;
FIG. 3 is a schematic diagram of a detection state of a rear headlight key assembly size gauge with a matching function according to the present invention;
FIG. 4 is a side view of a rear headlamp key assembly size gauge with a mating function of the present invention;
FIG. 5 is a schematic diagram showing the fit state of a rear headlight key assembly size gauge with a matching function and a back door opening gauge according to the present invention;
FIG. 6 is a side view of a key assembly size gauge with matching function for a rear headlight and a back door opening gauge;
FIG. 7 is a schematic illustration of a step matching surface of a rear headlight key assembly size gauge with matching function according to the present invention;
FIG. 8 is a schematic illustration of a step matching surface of a rear headlight key assembly size gauge with matching function according to the present invention;
FIG. 9 is a schematic diagram showing a comparison of the installation state of a rear headlight gauge in the prior art and a rear headlight key assembly size gauge with a matching function according to the present invention;
FIG. 10 is a schematic diagram of a back door opening gauge with a matching function for a key assembly size gauge of a rear headlight according to the present invention;
in the figure, 1-an existing rear headlight gauge; 2-a rear headlight key assembly size gauge with a matching function; 3-a back door opening gauge; 4-a side wall outer plate; 5-a back door; 6-a rear bumper; 7-parting ridge lines (without matching function, can not detect parting positions) on the existing rear headlight gauge; 8-a gap face difference matching face; 9, detecting a reference plane by using the gap surface difference; 10-step matching surface (split described in detection 11, 12); 11-parting of the side wall outer plate and the back door; 12-parting of the back door and the rear bumper; 13-rear headlight; 2.1-a side wall outer plate extension surface; 2.2-a back door extension; 2.3-rear bumper extension.
Detailed Description
The following describes the invention in further detail, including preferred embodiments, by way of the accompanying drawings and by way of examples of some alternative embodiments of the invention. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to fall within the scope of the invention.
In the description of the present application, it should be noted that the azimuth or positional relationship indicated by the terms "upper", "lower", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of description of the present application and simplification of the description, and are not indicative or implying that the apparatus or element in question must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present application. Unless specifically stated or limited otherwise, the terms "mounted," "connected," and "coupled" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.
Further, in this application, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
As shown in fig. 2-9, the invention discloses a key assembly size gauge 2 with a matching function for a rear headlight 13, which comprises a rear headlight 13 gauge, wherein the positioning and mounting structure of the back surface of the rear headlight 13 gauge is the same as that of an actual rear headlight 13, the front surface of the rear headlight 13 gauge comprises a side wall outer plate extension surface 2.1, a rear door extension surface 2.2 and a rear bumper extension surface 2.3, a side wall outer plate gap detection reference surface for detecting the welding size precision between the rear headlight 13 and a side wall outer plate 4 is arranged on the side wall outer plate extension surface 2.1, a rear door gap detection reference surface for detecting the welding size precision between the rear headlight 13 and a rear door 5 is arranged on the rear door extension surface 2.2, and a rear bumper gap detection reference surface for detecting the welding size precision between the rear headlight 13 and a rear bumper 6 is arranged on the rear bumper extension surface 2.3; a first level difference matching surface for detecting the level difference of a boundary line between the side wall outer plate 4 and the back door 5 is arranged between the side wall outer plate extension surface 2.1 and the back door extension surface 2.2, a second level difference matching surface for detecting the level difference of the boundary line between the back bumper 6 and the back door 5 is arranged between the back bumper extension surface 2.3 and the back door extension surface 2.2, a gap level difference matching surface for detecting the opening degree and the installation posture of the back door 5 is also arranged on the back door extension surface 2.2, the back door extension surface 2.2 comprises a plurality of sections of back door gap detection reference surfaces and gap level difference matching surfaces, the back door gap detection reference surfaces and the gap level difference matching surfaces are arranged at intervals, the width L1 of each section of back door gap detection reference surfaces is 25mm-50mm, the width L2 of each section of gap level difference matching surfaces is 25mm-50mm, the height of each section of back door gap detection reference surface is lower than or higher than the height of each section of gap level difference matching surface, and each section of gap level difference matching surface has a coplanar opening degree with the back door detection surface 3.
In a preferred embodiment of the invention, the clearance surface difference matching surface on the back door extension surface 2.2 is a boss or a groove provided on the back door extension surface 2.2.
In a preferred embodiment of the present invention, the first level difference matching surface is formed by a third level difference matching ridge line L3 and a fourth component level difference matching ridge line L4, the third level difference matching ridge line L3 is an intersection line formed by the tangential extension of the side wall outer panel 4 along the parting ridge line and the side wall outer panel gap detection reference surface, and the fourth component level difference matching ridge line L4 is an intersection line formed by the tangential extension of the back door 5 along the parting ridge line and the back door gap detection reference surface.
In a preferred embodiment of the present invention, the second level difference matching surface is constituted by a fifth level difference matching ridge line L5 and a sixth constituting level difference matching ridge line L6, the fifth level difference matching ridge line L5 extending tangentially along the parting ridge line to form an intersection with the rear bumper gap detection reference surface, and the sixth constituting level difference matching ridge line L6 being an intersection with the rear door gap detection reference surface along the parting ridge line of the rear door 5 extending tangentially.
In a preferred embodiment of the invention, the first step matching surface is tangent to the side body outer panel gap detection reference surface and the back door gap detection reference surface at the parting joint, and the second step matching surface is tangent to the rear bumper gap detection reference surface and the back door gap detection reference surface at the parting joint.
The specific steps of the configuration method of the rear headlight 13 gauge of the invention are as follows:
s1, a standard curved surface of the front surface and the side wall outer plate 4 of the key assembly size gauge of the headlight 13 after construction.
Specifically, the first step: a back headlight 13 environment part list (bilateral symmetry) is determined, and the back headlight comprises a side wall outer plate 4, a back door assembly and a back bumper 6. And a second step of: the ridge line a of the R rounded corner of the portion of the environmental piece in matching relation with the rear headlight 13 is made by a curved surface tangential extension method. Taking side body outer panel 4 as an example, see fig. 4. And a third step of: the tangential line b of the side wall outer plate 4 is taken as a starting point, the A curved surface of the side wall outer plate 4 is prolonged along the tangential direction to form a C curved surface, and the C curved surface is also a surface difference detection reference surface of the detection tool. See fig. 4. Fourth step: the B curved surface of the side wall outer plate 4 and the extension surface thereof are offset by 3mm (or 5 mm) to form a D curved surface which is also a gap detection reference surface of the detection tool. See fig. 4.
S2, constructing a clearance detection reference surface of the front face of the rear headlight 13, the rear door 5 and the rear bumper 6.
S3, a curved surface with a gap surface difference matching relation on the front surface of the constructed headlight 13 key assembly size detection tool is called a gap surface difference matching surface for short.
Specifically, the first step: the clearance surface difference matching relation between the environment piece back door opening gauge 3 and the key size gauge of the rear headlight 13 is determined in a local area. See fig. 5. And a second step of: and determining the distribution of the matching measurement areas, wherein the distribution rule of the matching surfaces is that the difference matching surfaces of the detection reference surfaces and the clearance surfaces are distributed at intervals. The detection reference surface is reserved in the inward L1 (25 mm-50 mm) area at the two ends of the matching area of the rear headlight 13, the detection reference surface is replaced by the gap surface difference matching surface in the inward L2 (25 mm-50 mm) area, and the detection reference surface is reserved in the inward area. See fig. 2. And a third step of: according to the distribution rule, a gap surface difference matching surface is constructed by the tangential surface of the curved surface of the headlight 13 and the extension surface of the tangential surface. And a tangent line C of the front curved surface of the rear headlight 13 is used as a starting point, the A curved surface of the rear headlight 13 is prolonged along the tangential direction to form a C curved surface, and the C curved surface is also a gap surface difference detection matching surface of the detection tool. And a normal plane of the C curved surface is formed along the tangent line C, the D curved surface is translated to the outermost edge of the rear headlight 13 by a normal method to form a D curved surface, and the D curved surface is also a clearance surface difference matching surface of the gauge. The matching surface D1 of the back door opening gauge 3 corresponding to the D surface is formed by shifting the D surface direction by 3 mm. See fig. 6. Fourth step: and replacing the detection reference surface with a clearance surface difference matching surface in the matching area.
S4, a matching surface (or a step matching ridge) with a step matching relation on the front surface of the key assembly size detection tool for the headlight 13 after construction is called step matching surface for short. The detection reference surface of the side wall outer plate 4 on the front side of the detection tool is an E surface, the detection reference surface of the back door 5 on the front side of the detection tool is an F surface, and the detection reference surface of the rear bumper 6 on the front side of the detection tool is a G surface. The L3 line is an intersection line formed by the side body outer panel 4 extending tangentially along the parting ridge line and the E-plane at the parting region of the side body outer panel 4 and the back door 5, the L4 line is an intersection line formed by the back door 5 extending tangentially along the parting ridge line and the F-plane, the L5 line is an intersection line formed by the back bumper 6 extending tangentially along the parting ridge line and the G-plane at the parting region of the back bumper 6 and the back door 5, and the L6 line is an intersection line formed by the back door 5 extending tangentially along the parting ridge line and the F-plane. L3 and L4 form M surface, and L5 and L6 form N surface. See fig. 7. When the M surface is tangent to the E surface and the F surface at the parting joint, the L3 line and the L4 line are called as step matching edge lines, and when the N surface is tangent to the G surface and the F surface at the parting joint, the L5 line and the L6 line are called as step matching edge lines. The engineering L3, L4, L5 and L6 lines can be realized by etching lines with the depth of 0.2mm and the width of 0.2mm on the E surface, the F surface and the G surface. See fig. 8.
The comparison of the gap surface difference detection reference surface and the gap surface difference matching surface structure surface method is shown in fig. 9.
The invention also discloses a method for detecting the key assembly size of the rear headlight 13, which comprises a rear headlight 13 key assembly size gauge 2 with a matching function;
s1, mounting a key assembly size gauge of a car rear headlight 13 with a matching function among a side wall outer plate 4, a back door 5 and a rear bumper 6;
s2, detecting welding dimensional accuracy between the rear headlight 13 and the side wall outer plate 4, welding dimensional accuracy between the rear headlight 13 and the back door 5 and welding dimensional accuracy between the rear headlight 13 and the back bumper 6 based on a side wall outer plate gap detection reference surface, a back door gap detection reference surface and a back bumper gap detection reference surface on the gauge;
s3, detecting the level difference of a boundary line between the side wall outer plate 4 and the back door 5 based on a first level difference matching surface on the gauge, and detecting the level difference of a boundary line between the rear bumper 6 and the back door 5 based on a second level difference matching surface on the gauge;
s4, detecting the opening degree and the installation posture of the back door 5 based on the clearance surface difference matching surface on the gauge.
In a preferred embodiment of the present invention, in S2, a clearance surface difference gauge is used to detect an actual measurement surface difference between the gauge and the side wall assembly, and a feeler gauge is used to detect an actual measurement clearance between the gauge and the side wall assembly, with reference to a side wall outer plate clearance detection reference surface on the gauge; acquiring a tolerance zone of a standard face difference and a tolerance zone of a standard gap at a detection position based on a body-in-white tolerance table; judging whether the actual measured surface difference and the actual measured gap fall in a tolerance zone of the standard surface difference and a tolerance zone of the standard gap, if so, judging that the welding precision of the side wall assembly is qualified, and if so, judging that the welding precision of the side wall assembly is unqualified, and adjusting a clamp;
detecting the actual measurement surface difference between the gauge and the back door 5 by using a clearance surface difference gauge and detecting the actual measurement clearance between the gauge and the back door 5 by using a feeler gauge by taking the back door clearance detection reference surface on the gauge as a reference; acquiring a tolerance zone of a standard face difference and a tolerance zone of a standard gap at a detection position based on a body-in-white tolerance table; judging whether the actual measured surface difference and the actual measured gap fall within a tolerance zone of the standard surface difference and a tolerance zone of the standard gap, if so, judging that the welding precision of the back door 5 is qualified, and if so, judging that the welding precision of the back door 5 is unqualified, and adjusting a clamp;
detecting the actual measurement surface difference between the gauge and the rear bumper 6 by using a clearance surface difference gauge and detecting the actual measurement clearance between the gauge and the rear bumper 6 by using a feeler gauge by taking the rear bumper clearance detection reference surface on the gauge as a reference; acquiring a tolerance zone of a standard face difference and a tolerance zone of a standard gap at a detection position based on a body-in-white tolerance table; and judging whether the actual measurement surface difference and the actual measurement gap fall within a tolerance zone of the standard surface difference and a tolerance zone of the standard gap, if so, judging that the welding precision of the rear bumper 6 is qualified, and if so, judging that the welding precision of the rear bumper 6 is unqualified, and adjusting a clamp.
In a preferred embodiment of the present invention, in S3, the edge line of the first step matching surface and the edge line of the second step matching surface on the gauge are used as reference lines, and a small steel plate rule is used to compare the actual gap between the parting line of the back door 5 and the side wall assembly and the parting line of the back door 5 and the rear bumper 6 and the edge line on the gauge; and acquiring a tolerance zone of the step difference at the detection position based on the whole vehicle appearance gap surface difference standard, judging whether the actual staggered joint distance falls within the tolerance zone of the step difference, if so, judging that the installation accuracy of the rear bumper 6 and the back door 5 is qualified, and if so, judging that the installation accuracy of the rear bumper 6 and the back door 5 is unqualified.
In a preferred embodiment of the present invention, in S4, the key assembly dimension gauge 2 with the matching function and the back door opening gauge 3 are mounted on the white car body at the same time, and the face difference value and the gap value of the gap face difference matching face on the key assembly dimension gauge 2 with the matching function and the detection face on the back door opening gauge 3 are measured; theoretically, the gap surface difference matching surface on the key assembly size gauge of the rear headlight 13 is flush with the detection surface on the back door opening gauge 3, the surface difference value is zero, and the gap is a standard gap of 3mm or 5mm; and subtracting the theoretical value from the actual measured value obtained by detection to obtain the compensation value of the face difference and the gap.
In a preferred embodiment of the present invention, in S1, when the welding dimensional accuracy of the side wall assembly around the rear headlight 13 is measured, the measured value in S1 is calibrated by the face difference and gap compensation value obtained in S4, and when the face difference and gap compensation value is greater than 1.5mm, the mounting posture of the back door 5 is not qualified, that is, the accuracy of the mounting points and faces of the back door 5 on the vehicle body is out of tolerance, and the mounting points and faces are adjusted by adjusting the fixture and then measured by using the inspection tool.
In summary, the specific use and measurement method of the gauge of the present invention is as follows: 1) The welding dimensional accuracy of the side wall assembly around the rear headlight 13 was measured. The key assembly size gauge of the rear headlight 13 can be independently arranged on the vehicle body, the detection surface of the gauge is used as a reference surface, the clearance surface difference gauge is used for detecting the surface difference between the gauge and the side wall assembly, and the clearance between the gauge and the side wall assembly is detected by the clearance gauge. The tolerance zone of the face difference and the gap is regulated in the white body tolerance table file, whether the actual measurement value falls in the tolerance zone is judged according to the actual measurement result, if the actual measurement value falls in the tolerance zone, the welding precision of the side wall assembly is judged to be qualified, if the welding precision of the side wall assembly falls outside the tolerance zone, the welding precision of the side wall assembly is judged to be unqualified, and the clamp needs to be adjusted. Similarly, the mounting dimensional accuracy of the rear bumper 6 assembly around the rear headlight 13 was measured. The assembled rear bumper 6 is assembled on the white vehicle body, and the gauge is assembled on the white vehicle body. The surface difference between the gauge and the rear bumper 6 is detected by using a clearance surface difference gauge with the detection surface of the gauge as a reference surface, and the clearance between the gauge and the rear bumper 6 is detected by using a feeler gauge. The tolerance zone of the surface difference and the gap is regulated in the white body tolerance table file, whether the actual measurement value falls in the tolerance zone is judged according to the actual measurement result, if the actual measurement value falls in the tolerance zone, the installation accuracy of the rear bumper 6 is judged to be qualified, if the installation accuracy of the rear bumper 6 falls outside the tolerance zone, the installation accuracy of the rear bumper 6 is judged to be unqualified, and the welding position of the installation bracket of the rear bumper 6 on the white body needs to be adjusted; similarly, the mounting dimensional accuracy of the back door 5 around the rear headlight 13 was measured. Detecting the actual measurement surface difference between the gauge and the back door 5 by using a clearance surface difference gauge and detecting the actual measurement clearance between the gauge and the back door 5 by using a feeler gauge by taking the back door clearance detection reference surface on the gauge as a reference; acquiring a tolerance zone of a standard face difference and a tolerance zone of a standard gap at a detection position based on a body-in-white tolerance table; judging whether the actual measurement face difference and the actual measurement gap fall within a tolerance zone of the standard face difference and a tolerance zone of the standard gap, if so, judging that the welding precision of the back door 5 is qualified, and if so, judging that the welding precision of the back door 5 is unqualified, and adjusting a clamp. 2) The level difference of the parting line between the parts of the surrounding parts of the rear headlight 13 is measured. The key assembly size gauge of the rear headlight 13 can be independently arranged on the vehicle body, and the parting line (parting line of the back door 5 and the side wall assembly and parting line of the back door 5 and the rear bumper 6) on the actual part and the parting line distance of the parting line on the gauge are compared by using a small steel plate ruler with the parting line on the step matching surface on the gauge as a datum line. The tolerance zone of the section difference is regulated in the whole vehicle appearance clearance surface difference specification file, whether the actual measurement value falls in the tolerance zone is judged according to the actual measurement result, if the actual measurement value falls in the tolerance zone, the installation accuracy of the rear bumper 6 and the back door 5 is judged to be qualified, and if the installation accuracy falls outside the tolerance zone, the installation accuracy of the rear bumper 6 and the back door 5 is judged to be unqualified. 3) The opening degree and the installation posture of the back door 5 are measured. The key assembly size gauge of the rear headlight 13 and the opening gauge 3 of the back door are simultaneously arranged on a white car body, and the face difference value and the gap value of a gap face difference matching face on the key assembly size gauge of the rear headlight 13 and a detection face on the opening gauge 3 of the back door are measured. In theory, the gap surface difference matching surface on the key assembly size gauge of the rear headlight 13 is flush with the detection surface on the back door opening gauge 3 (the surface difference is zero), and the gap is a standard gap of 3mm or 5mm. The actual measurement value is subtracted from the theoretical value to obtain a compensation value (calibration value) of the face difference and the gap, and the compensation value is considered when the welding dimensional accuracy (face difference and gap) of the peripheral side wall assembly of the rear headlight 13 is measured in the measuring method 1), and the actual measurement value is calibrated by using the compensation value, so that the gap face difference of the matching area of the rear door 5 and the rear headlight 13 can be accurately judged. When the face difference compensation value or the gap compensation value is larger than 1.5mm, the mounting posture of the back door 5, namely the accuracy of the mounting points and the faces of the back door 5 on the vehicle body, is judged to be out of tolerance, and the mounting points and the faces are adjusted by adjusting the tool clamp and then measured by using the gauge.
One specific example is as follows: the key assembly gauge of the rear headlight 13 is used to measure the face difference of the back door part assembled on the vehicle body. 1) Firstly, the key assembly gauge of the rear headlight 13 and the opening gauge 3 of the back door are simultaneously arranged on a white car body, and a clearance surface difference matching surface of the key assembly gauge of the rear headlight 13 and a detection surface of the opening gauge 3 of the back door are compared, so that the clearance surface difference is flush in theory, and the surface difference is zero in theory. However, the measured values were as follows: the detection surface of the back door opening gauge 3 is 0.5mm lower than the clearance surface difference matching surface (the surface is taken as a comparison reference surface) of the key assembly gauge of the rear headlight 13. The face difference compensation value is obtained and is recorded as: -0.5mm. 2) The back door opening gauge 3 is detached. 3) The back door 5 part is installed, the back door gap detection reference surface on the key assembly detection tool of the back headlight 13 is used as a reference, and the gap surface difference gauge is used for detecting the actual measurement surface difference between the detection tool and the back door 5 part, for example, the actual measurement value is-1.5 mm, namely, the back door 5 part is lower than the back door gap detection reference surface on the key assembly detection tool of the back headlight 13 by-1.5 mm. At this time, the influence of the compensation value of-0.5 mm on the measurement result is considered. The meaning of the compensation value-0.5 mm is that: due to the influence of the welding precision of the vehicle body, the mounting points (mounting holes and mounting surfaces) of the parts of the back door 5 on the vehicle body have precision deviation, so that the parts of the back door 5 are always 0.5mm lower than the back door gap detection reference surface on the key assembly gauge of the back headlight 13 on the vehicle body, and the tolerance of-0.5 mm is brought by the welding precision of the vehicle body, but not the parts of the back door 5. Therefore, the above-mentioned measured face difference value between the key assembly gauge of the rear headlight 13 and the back door 5 part is measured by using the clearance face difference gauge, and minus 0.5mm compensation value is subtracted to obtain the error value M of the back door 5 part at the measuring position. Namely: m= -1.5- (-0.5) = -1 (mm).
It will be readily understood by those skilled in the art that the foregoing is merely illustrative of the preferred embodiments of the present invention and that various modifications, combinations, substitutions, improvements, etc. may be made without departing from the spirit and principles of the invention.
Claims (10)
1. The utility model provides a take back headlight key assembly size of matching function to examine utensil, includes back headlight examine utensil, and the back of back headlight examine the location mounting structure of utensil and the location mounting structure of actual back headlight the same, the front of back headlight examine utensil includes side wall planking extension face, back door extension face and back bumper extension face, be provided with the side wall planking clearance detection reference surface that is used for detecting the welding dimension precision between back headlight and the side wall planking on the side wall planking extension face, be provided with the back door clearance detection reference surface that is used for detecting the welding dimension precision between back headlight and the back door on the back door extension face, be provided with the back bumper clearance detection reference surface that is used for detecting the welding dimension precision between back headlight and the back bumper on the back bumper extension face; the method is characterized in that: the back door extension surface is also provided with gap surface difference matching surfaces for detecting the opening degree and the installation posture of the back door, the back door extension surface comprises a plurality of sections of back door gap detection reference surfaces and gap surface difference matching surfaces, the back door gap detection reference surfaces and the gap surface difference matching surfaces are arranged at intervals, the width L1 of each section of back door gap detection reference surface is 25mm-50mm, the width L2 of each section of gap surface difference matching surface is 25mm-50mm, the height of each section of back door gap detection reference surface is lower than or higher than the height of each section of gap surface difference matching surface, and the gap surface difference detection reference surfaces and the gap surface on the back door are coplanar.
2. The rear headlight key assembly size gauge with a matching function according to claim 1, wherein: the clearance surface difference matching surface on the back door extension surface is a boss or a groove arranged on the back door extension surface.
3. The rear headlight key assembly size gauge with a matching function according to claim 1, wherein: the first level difference matching surface is formed by a third level difference matching ridge line L3 and a fourth level difference matching ridge line L4, the third level difference matching ridge line L3 is an intersection line formed by the tangential extension of the side wall outer plate along the parting ridge line and the side wall outer plate gap detection reference surface, and the fourth level difference matching ridge line L4 is an intersection line formed by the tangential extension of the back door along the parting ridge line and the back door gap detection reference surface.
4. The rear headlight key assembly size gauge with a matching function according to claim 1, wherein: the second level difference matching surface is composed of a fifth level difference matching ridge line L5 and a sixth component level difference matching ridge line L6, the fifth level difference matching ridge line L5 is an intersection line formed by the tangential extension of the rear bumper along the parting ridge line and the rear bumper gap detection reference surface, and the sixth component level difference matching ridge line L6 is an intersection line formed by the tangential extension of the rear door along the parting ridge line and the rear door gap detection reference surface.
5. The post-headlight key assembly size gauge with matching function according to claim 3 or 4, wherein: the first step matching surface is tangent to the side wall outer plate gap detection reference surface and the back door gap detection reference surface at the parting position, and the second step matching surface is tangent to the back bumper gap detection reference surface and the back door gap detection reference surface at the parting position.
6. A method for detecting key assembly dimensions of a rear headlight is characterized by comprising the following steps: a rear headlight key assembly size gauge with a matching function as claimed in any one of claims 1 to 5;
s1, mounting a key assembly size gauge with a matching function for a car rear headlight between a side wall outer plate, a back door and a back bumper;
s2, detecting welding dimensional accuracy between a rear headlight and the side wall outer plate, welding dimensional accuracy between the rear headlight and the back door and welding dimensional accuracy between the rear headlight and the back bumper based on a side wall outer plate gap detection reference surface, a back door gap detection reference surface and a back bumper gap detection reference surface on the gauge;
s3, detecting the level difference of a boundary line between the side wall outer plate and the back door based on a first level difference matching surface on the detection tool, and detecting the level difference of the boundary line between the rear bumper extension and the back door based on a second level difference matching surface on the detection tool;
s4, detecting the opening degree and the installation posture of the back door based on the clearance surface difference matching surface on the gauge.
7. The method for detecting critical assembly dimensions of a rear headlight according to claim 6, wherein: s2, detecting the actual measurement surface difference between the gauge and the side wall assembly by using a clearance surface difference gauge and detecting the actual measurement clearance between the gauge and the side wall assembly by using a feeler gauge by taking a side wall outer plate clearance detection reference surface on the gauge as a reference; acquiring a tolerance zone of a standard face difference and a tolerance zone of a standard gap at a detection position based on a body-in-white tolerance table; judging whether the actual measured surface difference and the actual measured gap fall in a tolerance zone of the standard surface difference and a tolerance zone of the standard gap, if so, judging that the welding precision of the side wall assembly is qualified, and if so, judging that the welding precision of the side wall assembly is unqualified, and adjusting a clamp;
detecting the actual measurement surface difference between the gauge and the back door by using a clearance surface difference gauge and detecting the actual measurement clearance between the gauge and the back door by using a feeler gauge by taking the back door clearance detection reference surface on the gauge as a reference; acquiring a tolerance zone of a standard face difference and a tolerance zone of a standard gap at a detection position based on a body-in-white tolerance table; judging whether the actual measured surface difference and the actual measured gap fall in a tolerance zone of the standard surface difference and a tolerance zone of the standard gap, if so, judging that the welding precision of the back door is qualified, and if so, judging that the welding precision of the back door is unqualified, and adjusting a clamp;
detecting the actual measurement surface difference between the gauge and the rear bumper by using a clearance surface difference gauge and detecting the actual measurement clearance between the gauge and the rear bumper by using a feeler gauge by taking the rear bumper clearance detection reference surface on the gauge as a reference; acquiring a tolerance zone of a standard face difference and a tolerance zone of a standard gap at a detection position based on a body-in-white tolerance table; judging whether the actual measurement surface difference and the actual measurement gap fall within a tolerance zone of the standard surface difference and a tolerance zone of the standard gap, if so, judging that the welding precision of the rear bumper is qualified, and if so, judging that the welding precision of the rear bumper is unqualified, and adjusting a clamp.
8. The method for detecting critical assembly dimensions of a rear headlight according to claim 6, wherein: s3, using the ridge line of the first level difference matching surface and the ridge line of the second level difference matching surface on the gauge as reference lines, and comparing the parting joint of the back door and the side wall assembly with the actual staggered joint distance between the parting joint of the back door and the back bumper and the ridge line on the gauge by using a small steel plate ruler; and acquiring a tolerance zone of the level difference of the detection position based on the whole vehicle appearance clearance surface difference standard, judging whether the actual staggered joint distance falls within the tolerance zone of the level difference, if so, judging that the mounting precision of the rear bumper and the back door is qualified, and if so, judging that the mounting precision of the rear bumper and the back door is unqualified.
9. The method for detecting critical assembly dimensions of a rear headlight according to claim 6, wherein: s4, simultaneously mounting a rear headlight key assembly size gauge with a matching function and a back door opening gauge on the white car body, and measuring a face difference value and a gap value of a gap face difference matching face on the rear headlight key assembly size gauge with the matching function and a detection face on the back door opening gauge; theoretically, a gap surface difference matching surface on the rear headlight key assembly size gauge is flush with a detection surface on the back door opening gauge, the surface difference value is zero, and the gap is a standard gap of 3mm or 5mm; and subtracting the theoretical value from the actual measured value obtained by detection to obtain the compensation value of the face difference and the gap.
10. The rear headlight key assembly size detection method according to claim 9, wherein: in S1, when the welding dimensional accuracy of the side wall assembly around the rear headlight is measured, the measured value in S1 is calibrated by the compensation value of the face difference and the gap obtained in S4, and when the compensation value of the face difference and the gap is larger than 1.5mm, the mounting posture of the back door is unqualified, namely the accuracy of the mounting points and the faces of the back door on the automobile body is out of tolerance, and the mounting points and the faces are adjusted by adjusting the fixture and then measured by using the gauge.
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