CN108927553B - Step deep hole built-in guide sleeve and manufacturing method - Google Patents
Step deep hole built-in guide sleeve and manufacturing method Download PDFInfo
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- CN108927553B CN108927553B CN201710367933.8A CN201710367933A CN108927553B CN 108927553 B CN108927553 B CN 108927553B CN 201710367933 A CN201710367933 A CN 201710367933A CN 108927553 B CN108927553 B CN 108927553B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B47/00—Constructional features of components specially designed for boring or drilling machines; Accessories therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B41/00—Boring or drilling machines or devices specially adapted for particular work; Accessories specially adapted therefor
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Abstract
The invention belongs to the technical field of deep hole machining, and discloses a step deep hole built-in guide sleeve and a manufacturing method thereof. Comprises an elastic positioning sleeve (1) and a self-locking guide sleeve (2); the invention relates to a guiding tool arranged in a hole, which can solve the processing limitation of a composite gun drill and overcome the processing problem of multi-step deep hole parts.
Description
Technical Field
The invention belongs to the technical field of deep hole machining, and particularly relates to a built-in guide sleeve of a step deep hole and a manufacturing method.
Background
The multi-step deep hole type part is widely used in an airborne product, the step aperture difference is small, if the prior art is adopted to drill a small hole before drilling a large hole, the large hole drilling belongs to reaming processing, and because the single-side allowance is small, strip-shaped scrap iron can be generated during processing, the scrap iron is not easy to break, can enter an oil outlet of a machine tool along a gun drill chip removal groove, and is wound on a cutter bar at the position, the deeper winding of the hole is more, the difficulty in cleaning is high, and the breakage of a cutting edge is easily caused. The other method is to drill a big hole first and then drill a small hole, which can not generate band-shaped scrap iron, but the small hole can not be processed because the cutter has no supporting point.
Disclosure of Invention
The purpose of the invention is as follows: the guiding tool arranged in the hole is researched, the processing limitation of a composite gun drill can be solved, the processing problem of a multi-step deep hole part is solved, the processing method that a large hole is drilled before a small hole is drilled is realized, the winding of strip-shaped scrap iron is avoided, the requirement on size precision is met, the function of quick assembly and disassembly can be realized, and the efficiency is improved.
The technical scheme of the invention is as follows: a step deep hole built-in guide sleeve is characterized by comprising an elastic positioning sleeve 1 and a self-locking guide sleeve 2; the elastic locating sleeve 1 is of a barrel-shaped structure, the two ends of the elastic locating sleeve are provided with uniformly distributed long through grooves staggered at a certain angle, so that the elastic locating sleeve 1 has certain elastic expansion amount, the inner hole is a taper hole, and the large-end orifice of the taper hole is provided with two symmetrical bosses which are assembled with the self-locking guide sleeve 2 for use; the self-locking guide sleeve 2 is of a step barrel-shaped structure, the step divides the long barrel into two parts, the longer end is conical, two symmetrical bosses are arranged at the root part of the long barrel, and a conical surface is arranged at an inner orifice of the shorter end; the self-locking guide sleeve 2 is arranged in the elastic positioning sleeve 1 and is fixedly connected with the conical large-end orifice of the elastic positioning sleeve.
The outer circle surface of the elastic locating sleeve 1 is a friction surface, so that enough friction force is generated when the elastic locating sleeve is fixed in an inner hole of a part, and the elastic locating sleeve is not flushed out by high-pressure oil.
The elastic locating sleeve 1 and the self-locking guide sleeve 2 are fixedly connected in a conical surface matching and locking type connection mode.
The big end orifice conical surface of the self-locking guide sleeve 2 is provided with an annular groove, and the orifice end surface is provided with two symmetrical straight grooves, so that the self-locking guide sleeve is convenient to assemble and disassemble by using a multifunctional special tool.
A manufacturing method of a step deep hole built-in guide sleeve comprises the following steps:
(1) designing and processing an elastic positioning sleeve 1; performing friction increasing treatment on an outer circle of a processed material, turning an inner cone hole and reserving a certain allowance, performing heat treatment to enable the hardness to reach HRC56-62, grinding to reach the size requirement, linearly cutting the redundant part of an orifice ring table, reserving two bosses, and cutting elongated grooves at two ends;
(2) designing and processing a self-locking guide sleeve 2; turning the excircle and the inner hole of the conical surface, reserving certain allowance, turning the rest to the size, ensuring the sizes of two bosses at the excircle during milling, performing heat treatment to enable the hardness to reach HRC56-62, and grinding the bosses to the sizes of the inner hole and the outer conical surface;
(3) designing and processing a multifunctional special tool: turning each excircle and length size, milling end faces to ensure the size of two bosses, drilling small holes by bench workers, and performing heat treatment to ensure that the hardness reaches HRC 42-48.
The elastic locating sleeve 1 and the self-locking guide sleeve 2 are made of CrWMn with the hardness of HRC 56-62.
The multifunctional special tool is made of 45# steel with the hardness of HRC 42-48.
The coaxiality of the self-locking guide sleeve 2 in the manufacturing process is within phi 0.01.
The invention has the beneficial effects that: the invention relates to a guiding tool arranged in a hole, which can solve the processing limitation of a composite gun drill and overcome the processing problem of multi-step deep hole parts.
Drawings
FIG. 1 is an assembly diagram of a guide sleeve with a built-in step deep hole
FIG. 2-a is a front view of the elastic positioning sleeve
FIG. 2-b is a left side view of the elastic positioning sleeve
FIG. 2-c is a cross-sectional view of the elastic positioning sleeve
FIG. 3-a is a front view of a self-locking guide sleeve
FIG. 3-b is a left side view of the self-locking guide sleeve
FIG. 3-c is a cross-sectional view of the self-locking boot
FIG. 4-a is a front view of the multi-purpose special tool
FIG. 4-b is a right side view of the multi-function special tool
Detailed Description
The use of the invention is further illustrated below:
a step deep hole built-in guide sleeve, as shown in figure 1, comprises an elastic positioning sleeve 1 and a self-locking guide sleeve 2; the elastic locating sleeve 1 is of a barrel-shaped structure, the two ends of the elastic locating sleeve are provided with uniformly distributed long through grooves staggered at a certain angle, so that the elastic locating sleeve 1 has certain elastic expansion amount, the inner hole is a taper hole, and the large-end orifice of the taper hole is provided with two symmetrical bosses which are assembled with the self-locking guide sleeve 2 for use; the self-locking guide sleeve 2 is of a step barrel-shaped structure, the step divides the long barrel into two parts, the longer end is conical, two symmetrical bosses are arranged at the root part of the long barrel, and a conical surface is arranged at an inner orifice of the shorter end; the self-locking guide sleeve 2 is arranged in the elastic positioning sleeve 1 and is fixedly connected with the conical large-end orifice of the elastic positioning sleeve. The outer circle surface of the elastic locating sleeve 1 is a friction surface, so that enough friction force is generated when the elastic locating sleeve is fixed in an inner hole of a part, and the elastic locating sleeve is not flushed out by high-pressure oil. The elastic locating sleeve 1 and the self-locking guide sleeve 2 are fixedly connected in a conical surface matching and locking type connection mode. The big end orifice conical surface of the self-locking guide sleeve 2 is provided with an annular groove, and the orifice end surface is provided with two symmetrical straight grooves, so that the self-locking guide sleeve is convenient to assemble and disassemble by using a multifunctional special tool.
The manufacturing method of the step deep hole built-in guide sleeve comprises the following steps:
(1) designing an elastic locating sleeve, see fig. 2: the elastic positioning sleeve is of a barrel-shaped structure, the two ends of the elastic positioning sleeve are provided with uniformly distributed long through grooves staggered at a certain angle, the inner hole is a taper hole, and the large-end hole is provided with two symmetrical bosses which are matched with the self-locking guide sleeve for use. Performing friction increasing treatment on an outer circle of a processed material, turning an inner cone hole and reserving a certain allowance, performing heat treatment to enable the hardness to reach HRC56-62, grinding to reach the size requirement, linearly cutting the redundant part of an orifice ring table, reserving two bosses, and cutting elongated grooves at two ends;
(2) designing a self-locking guide sleeve, see fig. 3: the self-locking guide sleeve is of a step barrel-shaped structure, the excircle of the longer end of the self-locking guide sleeve is conical, two symmetrical bosses are arranged at the root of the self-locking guide sleeve, and the orifice of the excircle of the shorter end of the self-locking guide sleeve is provided with a conical surface; the self-locking guide sleeve is sleeved in the elastic positioning sleeve 1 and is fixedly connected with the orifice of the conical big end of the elastic positioning sleeve. Turning the excircle and the inner hole of the conical surface, reserving certain allowance, turning the rest to the size, ensuring the sizes of two bosses at the excircle during milling, performing heat treatment to ensure that the hardness reaches HRC56-62, and grinding the inner hole and the outer conical surface to reach the required sizes;
(3) designing a multifunctional special tool, see fig. 4: the multifunctional special tool is of a cylindrical step structure, two symmetrical bosses are arranged on the end face of the large end and can be used for rotatably assembling and disassembling the self-locking guide sleeve, and the small end is of a small section of cylinder and can be used for taking out the self-locking guide sleeve; the sizes of the large end and the small end are consistent with the sizes of the large hole and the small hole of the part, and the aperture and the coaxiality of the large hole and the small hole can be detected by using the large end and the small end of the multifunctional special tool.
The cutter rotates at a high speed in the built-in self-locking guide sleeve hole, and the material is required to have high wear resistance, so that the elastic positioning sleeve 1 and the self-locking guide sleeve 2 are made of CrWMn with the hardness of HRC 56-62; the multifunctional special tool is made of 45# steel with the hardness of HRC 42-48; the built-in self-locking guide sleeve 2 requires high guide precision, and the coaxiality in the manufacturing process is within phi 0.01.
Method of use, see fig. 1:
the first step is as follows: placing the elastic locating sleeve 1 at the bottom of the processed large hole by using a multifunctional special tool;
the second step is that: pushing the self-locking guide sleeve 2 into the taper hole of the elastic positioning sleeve 1, clamping a large-end boss of a multifunctional special tool in a groove on the end surface of the self-locking guide sleeve 2 and rotating to lock an outer taper root boss of the self-locking guide sleeve with an orifice boss of the elastic positioning sleeve 1;
the third step: after the small hole is machined, the self-locking guide sleeve 2 is rotated by a multifunctional special tool, is unlocked with the elastic positioning sleeve 1, and the tool is taken out.
Example (b):
the invention relates to a processing method, which is based on a step deep hole built-in guide sleeve and realizes the processing method of processing a large hole first and then a small hole:
the invention effectively solves the problem by using the invention, the efficiency is improved by more than one time, and the surface quality of the inner hole is also improved.
The method comprises the following implementation steps:
1. processing the big hole of the part to the size;
2. arranging a guide sleeve arranged in the deep hole of the step at the bottom of the large hole, and locking;
3. rapidly moving a cutter for processing the small hole to a position close to the built-in guide sleeve;
4. the main shaft rotates at a low speed to enable the cutter to enter a proper position in the built-in guide sleeve hole;
5. rotating the main shaft at a high speed and starting to process small holes;
6. after the processing is finished, the built-in guide sleeve is taken out by a multifunctional special tool;
7. detecting the aperture and the coaxiality of the large hole and the small hole by using a multifunctional special tool;
8. and (5) after the machining is finished, taking down the part.
The structure can be popularized and applied to similar parts, replaces a composite gun drill to a certain extent, solves the processing limitation of the composite gun drill, and reduces the cost of the cutter. The disposable investment cost is low, the reusable is realized, and the cost can be obviously reduced and the efficiency can be obviously improved.
Claims (7)
1. A step deep hole built-in guide sleeve is characterized by comprising an elastic positioning sleeve (1) and a self-locking guide sleeve (2); the elastic positioning sleeve (1) is of a barrel-shaped structure, the two ends of the elastic positioning sleeve are provided with uniformly distributed long through grooves which are staggered at a certain angle, so that the elastic positioning sleeve (1) is of a barrel-shaped structure, the two ends of the elastic positioning sleeve are provided with uniformly distributed long through grooves which are staggered at a certain angle, the elastic positioning sleeve has a certain elastic expansion amount, the outer circle surface is a friction surface, the inner hole is a taper hole, and the large-end orifice of the taper hole is provided with two symmetrical bosses which are assembled with the self-locking guide sleeve; the self-locking guide sleeve (2) is of a step barrel-shaped structure, the step divides the long barrel into two parts, the longer end is conical, the root part of the long barrel is provided with two symmetrical bosses, and the inner orifice of the shorter end is provided with a conical surface; the self-locking guide sleeve (2) is arranged in the elastic positioning sleeve (1) and fixedly connected with the conical big end orifice, the built-in guide sleeve is matched with a multifunctional special tool for use, the multifunctional special tool is of a cylindrical step structure, the end face of the big end is provided with two symmetrical bosses, the small end is a small section of cylinder, the size of the big end and the size of the small end are consistent with that of the big hole and the small hole of a part, and the diameter and the coaxiality of the big hole and the small hole can be detected by using the big end and the small end of the multifunctional special tool.
2. The stepped deep hole built-in guide sleeve according to claim 1, wherein the fixed connection of the elastic locating sleeve (1) and the self-locking guide sleeve (2) is a taper fit and lock catch type connection.
3. The stepped deep hole built-in guide sleeve according to claim 2, wherein the large-end orifice conical surface of the self-locking guide sleeve (2) is provided with an annular groove, and the orifice end surface is provided with two symmetrical straight grooves, so that the guide sleeve is convenient to assemble and disassemble by using a multifunctional special tool.
4. The method for manufacturing a stepped deep hole built-in guide bush according to any one of claims 1 to 3,
(1) designing and processing an elastic positioning sleeve (1); performing friction increasing treatment on an outer circle of a processed material, turning an inner cone hole and reserving a certain allowance, performing heat treatment to enable the hardness to reach HRC56-62, grinding to reach the size requirement, linearly cutting the redundant part of an orifice ring table, reserving two bosses, and cutting elongated grooves at two ends;
(2) designing and processing a self-locking guide sleeve (2); turning the excircle and the inner hole of the conical surface, reserving certain allowance, turning the rest to the size, ensuring the sizes of two bosses at the excircle during milling, performing heat treatment to enable the hardness to reach HRC56-62, and grinding the bosses to the sizes of the inner hole and the outer conical surface;
(3) designing and processing a multifunctional special tool: turning each excircle and length size, milling end faces to ensure the size of two bosses, drilling small holes by bench workers, and performing heat treatment to ensure that the hardness reaches HRC 42-48.
5. The manufacturing method of the stepped deep hole built-in guide sleeve according to claim 4, wherein the elastic locating sleeve (1) and the self-locking guide sleeve (2) are made of CrWMn with the hardness of HRC 56-62.
6. The method for manufacturing the step deep hole built-in guide sleeve according to claim 4 or 5, wherein the multifunctional special tool is made of 45# steel with the hardness of HRC 42-48.
7. The method for manufacturing the stepped deep hole built-in guide sleeve according to claim 6, wherein the coaxiality of the self-locking guide sleeve (2) in the manufacturing process is within phi 0.01.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710367933.8A CN108927553B (en) | 2017-05-23 | 2017-05-23 | Step deep hole built-in guide sleeve and manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710367933.8A CN108927553B (en) | 2017-05-23 | 2017-05-23 | Step deep hole built-in guide sleeve and manufacturing method |
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| Publication Number | Publication Date |
|---|---|
| CN108927553A CN108927553A (en) | 2018-12-04 |
| CN108927553B true CN108927553B (en) | 2021-03-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710367933.8A Active CN108927553B (en) | 2017-05-23 | 2017-05-23 | Step deep hole built-in guide sleeve and manufacturing method |
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Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1748006A (en) * | 1926-10-28 | 1930-02-18 | George H Wohlart | Bushing |
| US2457709A (en) * | 1945-08-11 | 1948-12-28 | Falk Corp | Jig bushing |
| US7210881B2 (en) * | 2003-12-30 | 2007-05-01 | Greenberg Alex M | Sleeved stop for a drill bit |
| CN201437161U (en) * | 2009-06-04 | 2010-04-14 | 宁波远达船机配件有限公司 | Positioning device of deep hole processing drill bit |
| CN201940784U (en) * | 2010-12-21 | 2011-08-24 | 苏州工业职业技术学院 | Machining device of large length-diameter ratio nonferrous metal step deep hole |
| CN102303144B (en) * | 2011-08-20 | 2012-12-26 | 湖南凯斯机械股份有限公司 | Method for machining deep holes of large-scale transmission box |
| CN202539638U (en) * | 2011-09-21 | 2012-11-21 | 江苏文光车辆附件有限公司 | Deep hole drill bit guide sleeve |
| CN203282004U (en) * | 2013-05-09 | 2013-11-13 | 苏州工业园区海维尔新材料有限公司 | Fixture for machining ultra-deep stepped hole |
| CN105499645A (en) * | 2015-12-25 | 2016-04-20 | 富诚汽车零部件有限公司 | Deep hole drill with lengthened sleeve |
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2017
- 2017-05-23 CN CN201710367933.8A patent/CN108927553B/en active Active
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