CN112536359B - Method for optimizing curved surface defect at door handle position of outer plate of vehicle door - Google Patents

Abstract

The invention provides a method for optimizing a curved surface defect at a door handle position of a vehicle door outer plate. The method comprises the following steps: step one: the outer door plate is subjected to forced compression molding through a drawing die, and a curved surface area around a concave surface area of a door handle is subjected to blue oil heavy coloring during the grinding and the matching; step two: judging whether the coloring is uniformly whitened, if so, checking whether the curved surface area is qualified through the oil stone, and if so, not optimizing the curved surface area; if the coloring is uneven or the inspection is unqualified, the curved surface area is forced by a flanging sizing die and the concave surface area is left empty, and blue oil is adopted to heavy color the curved surface area during the grinding and the matching; step three: and step two, re-executing the step until the curved surface area is checked to be qualified through the oilstone. The optimization method can improve the defects of the curved surface area around the concave surface of the door handle, reduce the manual grinding workload of a fitter and shorten the grinding period of a die.

Description

Method for optimizing curved surface defect at door handle position of outer plate of vehicle door

Technical Field

The invention relates to the technical field of door outer plate molding, in particular to a method for optimizing a curved surface defect at a door handle position of a door outer plate.

Background

The curved surface area of the door handle installation position of the outer plate of the automobile door is a concave surface model, in the drawing molding process, the concave surface model is subjected to plastic deformation, so that the thickness of the curved surface plate around the concave surface is changed, the thinning rate of the curved surface around the concave surface is increased, and the thinning rate of the curved surface area around the concave surface is unevenly changed due to the fact that the concave surface of the door handle is irregularly molded. Such surface defects can be visually seen by way of the oilstone.

In the prior art, in order to eliminate or alleviate the defect of the curved surface around the concave surface of the door handle, a method of grinding a drawing die is generally adopted, namely, by changing the shape of a die cavity of the drawing die, the method can improve the blue oil coloring rate of the curved surface around the concave surface of the door handle, and eliminate or alleviate the defect.

However, the prior art approach increases the difficulty of the fitter's engagement and extends the engagement cycle.

Disclosure of Invention

In order to solve the problems, the invention provides a method for optimizing the position curved surface defects of a door handle of a vehicle door outer plate, and the defects of the curved surface area around a concave surface of the door handle can be improved through the optimizing method.

In order to solve the problems, the technical scheme of the invention is to provide a method for optimizing the position curved surface defect of a door handle of a vehicle door outer plate, which comprises the following steps:

step one: the outer door plate is subjected to forced compression molding through a drawing die, and a curved surface area around a concave surface area of a door handle is subjected to blue oil heavy coloring during the grinding and the matching;

step two: judging whether the coloring is uniformly whitened, if so, checking whether the curved surface area is qualified through the oil stone, and if so, not optimizing the curved surface area;

if the coloring is uneven or the inspection is unqualified, the curved surface area is forced by a flanging sizing die and the concave surface area is left empty, and blue oil is adopted to heavy color the curved surface area during the grinding and the matching;

step three: and step two, re-executing the step until the curved surface area is checked to be qualified through the oilstone.

In one possible embodiment, if the coloring is uneven or the inspection is failed in the second step, before the step of performing the step of forcing the curved surface area, the method further includes:

in the edge trimming process, a concave surface area of the door handle is punched through an edge trimming die, a plane for punching in the concave surface area is subjected to forced compression treatment, and other areas except for the plane for punching in the concave surface area are subjected to blank treatment.

In one possible embodiment, the region heavily blue oil-colored to the curved surface region is an annular region extending outwardly from a corner where the concave region joins the curved surface region by 60mm along the curved surface region.

In one possible embodiment, the area where the curved surface area is forced by the flanging die is an annular area extending outwards by 60mm along the curved surface area from a corner where the concave surface area is connected with the curved surface area.

According to the method for optimizing the curved surface defect of the door handle position of the vehicle door outer plate, the flanging sizing die is adopted to carry out strong compression on the curved surface area around the concave surface of the door handle, the strong compression amount of the curved surface area around the concave surface of the door handle is increased, the area is ground and matched again until the area is heavy-colored and the coloring is uniformly whitened, so that the grinding rate of the curved surface area around the concave surface of the door handle and the die is improved, and then the defect of the curved surface area around the concave surface of the door handle is improved.

Drawings

FIG. 1 is a flowchart of a method for optimizing a curved surface defect at a door handle position of a vehicle door outer panel according to an embodiment of the present invention;

FIG. 2 is a schematic diagram showing a partial schematic view of the position relationship between a concave surface region and a curved surface region around the concave surface according to an embodiment of the present invention;

fig. 3 is a schematic partial view of a concave area according to an embodiment of the invention.

Reference numerals illustrate:

10-concave area; 20-A surface; 30-punching a key plane; 40-leaving the surface empty.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present 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 be within the scope of the invention.

The door handle mounting position of the outer door panel of the automobile is provided with a mounting hole for mounting the door handle and a concave cavity for embedding the door handle in the door, that is, the whole area for placing the door handle is set as a concave area. Two flat surfaces for punching the front and rear mounting holes of the handle are provided in this concave region, and a peripheral curved surface region of this concave region is defined as an a-plane 20 in this embodiment. The concave region 10 of the door handle is plastically deformed, and the surrounding curved surface is stretched during the molding process, that is, the thickness of the surrounding curved surface region (A surface 20) is changed, that is, the thinning rate of the A surface 20 region is increased, but the thinning rate of the A surface 20 region is unevenly changed due to the irregular modeling of the concave region 10 of the door handle.

In order to inspect the defect condition of the area of the surface a 20, a manner of polishing the oil stone is generally adopted, namely, marks are drawn on the surface a 20 through the oil stone, and if the drawn marks are continuous, the condition that the area of the surface a 20 is not deformed in a wave manner is indicated, so that the surface a 20 is qualified; if intermittent, it indicates that dishing has occurred, indicating that the a-plane 20 is not acceptable.

In order to overcome the wave deformation of the a-face 20, the a-face 20 is optimized by changing the mode of lapping the drawing die, that is, changing the shape of the concave-convex die at the corresponding position of the drawing die. However, this approach increases the difficulty of the development and increases the development cycle due to the need to re-create the model and develop the development using the new model.

The invention eliminates or reduces the wave deformation defect of the A surface 20 by changing the molding process of the concave area at the door handle of the outer plate of the vehicle door after being pressed on the basis of not changing the existing drawing die. Specific reference is made to the following examples.

Referring to fig. 1-3, the present embodiment provides a method for optimizing a curved surface defect at a door handle position of a vehicle door outer panel, comprising the steps of:

s1: and (3) carrying out forced compression molding on the outer door plate through a drawing die, and adopting blue oil heavy coloring on a curved surface area around the concave surface of the door handle during the grinding and matching.

Specifically, the door handle depression area of the door outer panel treated by the original drawing die forced pressing method is firstly subjected to blue oil heavy coloring, that is, whether the A face 20 of the door outer panel obtained by the original drawing die forced pressing method is qualified is firstly judged, the grinding rate of the drawing die forced pressing treatment is required to be judged before judging whether the A face 20 is qualified, and the method is generally adopted that the blue oil heavy coloring is adopted on the surface of the A face 20, and whether the coloring is uniformly whitened is judged, so that whether the grinding rate meets the requirement is obtained.

S2: judging whether the coloring is uniformly whitened, if so, checking whether the curved surface area is qualified through the oil stone, and if so, not optimizing the curved surface area; and if the coloring is uneven or the inspection is unqualified, the curved surface area is forced by a flanging sizing die and the concave surface area is left empty, and blue oil is adopted to heavy color the curved surface area during the grinding and the matching.

Specifically, if the grinding rate during grinding meets the requirement, it is necessary to further determine whether the a-surface 20 is acceptable, determine whether the a-surface 20 is acceptable by using an oilstone method, determine whether the a-surface 20 is acceptable by determining whether scratches of the oilstone on the a-surface 20 are continuous, and if so, do not need to be optimized. If the lapping rate is not satisfactory or fails the oilstone test, an optimization of the A-side 20 is required. Alternatively, the a-side 20 is subjected to a strong pressure treatment by the flanging die when the door outer panel is subjected to flanging and shaping, and only the a-side 20 is subjected to a strong pressure, and the door handle concave surface region 10 is subjected to an empty treatment, i.e. the regions are not subjected to a strong pressure, and the part is released in the strong pressure process. After strong pressure, grinding and matching are carried out, and whether the A surface 20 is qualified or not is observed. By leaving the concave region 10 empty, the impact of the strong pressure on the concave region 10 is reduced.

In the original mode for improving the defects of the A face 20, the whole profile gap of the A face 20 of the non-door handle area is enlarged during grinding to ensure that the blue oil in the A face 20 of the door handle area is heavy and evenly colored and whitened, so that the grinding difficulty of a bench worker is increased and the grinding period is prolonged. In this embodiment, the area of the a-face 20 of the door handle is optimized by the flanging die, and only the strong pressure of the area of the a-face 20 of the door handle is increased, and the area is ground to be heavy-colored and uniformly whitened. That is, by changing the gap between the concave and convex molds by strong pressure in the area of the a-face 20, the grinding rate is improved, and the forming quality of the a-face 20 can be improved after the grinding rate is improved, that is, the wave defect on the a-face 20 can be reduced or eliminated. By the scheme of the embodiment, the manual grinding work load of a fitter is reduced, and the grinding period of a die is shortened.

S3: and S2, re-executing until the curved surface area is qualified through the oilstone.

Specifically, in the step S2 of grinding, blue oil is adopted to re-color the surface a 20, whether the grinding rate of the area meets the requirement is judged, if the grinding rate meets the requirement, whether the surface a 20 is qualified is judged by the way of oil stone, only if the surface a 20 is qualified by the way of oil stone, the step S2 is not required to be repeated, and otherwise, strong pressing is required to be carried out for many times. Of course, the number of times of strong pressing needs to be controlled to meet the structural strength performance, and the mechanism cannot be damaged.

In order to reduce the influence of the flanging die on other factors when the flanging die is pressed strongly against the A face 20, in the trimming process of the outer plate of the vehicle door, the concave face area 10 of the door handle is punched through the trimming die before the step is executed, the plane for punching in the concave face area 10 is pressed strongly through the trimming die, and other areas except the plane for punching in the concave face area 10 are subjected to blank processing.

That is, the punching key plane 30 is subjected to the forced pressing treatment by the edge trimming die, so as to reduce the influence of the flanging die on the punching of the punching key plane 30 when the a-plane 20 is forced, in which process only the plane for punching (the punching key plane) is forced when the punching is forced, and the other positions of the concave surface region 10 are subjected to the blank treatment, such as the blank surface 40 in fig. 3. By only forcing the key plane 30, other areas are left empty to avoid the crush injury of the blank to the non-working area of the trimming die and the aggravation of the surface product defect.

In one possible implementation, the a-side 20 region heavily pigmented with blue oil is an annular region extending 60mm outwardly along the a-side 20 from the top of the concave region 10 at the corner where the root of the a-side 20 region joins. This region is the principal a-plane 20 deformation region obtained by force analysis.

Similarly, the area where the curved surface area is forced by the flanging die is also an annular area extending outwards by 60mm along the surface a 20 from the corner where the top of the concave area 10 is connected with the root of the surface a 20.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.

Claims (1)

1. The method for optimizing the curved surface defect of the door handle of the outer plate of the vehicle door is characterized by comprising the following steps of:

step one: the method comprises the steps of performing forced compression molding on a vehicle door outer plate through a drawing die, and adopting blue oil heavy coloring on a curved surface area around a concave surface area of a door handle during grinding, wherein the area adopting blue oil heavy coloring on the curved surface area is an annular area extending outwards for 60mm along the curved surface area from the connecting corner of the concave surface area and the curved surface area;

step two: judging whether the coloring is uniformly whitened, if so, checking whether the curved surface area is qualified through the oil stone, and if so, not optimizing the curved surface area;

if the coloring is uneven or the inspection is unqualified, punching a concave surface area of the door handle by a trimming die in the trimming process, performing forced pressing treatment on a plane used for punching in the concave surface area, and performing blank treatment on other areas except the plane used for punching in the concave surface area;

the curved surface area is forced by a flanging sizing die and is left empty, blue oil is adopted to be heavily colored when the curved surface area is ground, and the area which is forced by the flanging sizing die is an annular area which extends outwards by 60mm from the connecting corner of the concave surface area and the curved surface area along the curved surface area;

step three: and step two, re-executing the step until the curved surface area is checked to be qualified through the oilstone.