CN112338092A - Method for eliminating distortion of lap joint area of front bumper of fender stamping part - Google Patents
Method for eliminating distortion of lap joint area of front bumper of fender stamping part Download PDFInfo
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- CN112338092A CN112338092A CN202011012949.5A CN202011012949A CN112338092A CN 112338092 A CN112338092 A CN 112338092A CN 202011012949 A CN202011012949 A CN 202011012949A CN 112338092 A CN112338092 A CN 112338092A
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- area
- bumper
- data
- lap joint
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D53/00—Making other particular articles
- B21D53/88—Making other particular articles other parts for vehicles, e.g. cowlings, mudguards
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C51/00—Measuring, gauging, indicating, counting, or marking devices specially adapted for use in the production or manipulation of material in accordance with subclasses B21B - B21F
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D1/00—Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling
- B21D1/12—Straightening vehicle body parts or bodies
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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
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
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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
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/14—Measuring arrangements characterised by the use of optical techniques for measuring distance or clearance between spaced objects or spaced apertures
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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
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/16—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring distance of clearance between spaced objects
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Automobile Manufacture Line, Endless Track Vehicle, Trailer (AREA)
Abstract
The invention discloses a method for eliminating the distortion of a lap joint area of a front bumper of a fender stamping part, which comprises the application of a forming compensation process, the development of a debugging process and the like. The method uses the cooperation of precision measurement equipment to confirm the front protection distortion rebound quantity of a fender stamping part; by supplementing fillet compensation to the shaping process and utilizing the principle that the fillet is stably shaped through plastic deformation, the front-protection distortion rebound of the fender stamping part is effectively corrected; standardizing the symbol grinding direction to ensure that the front protection distortion and resilience of the corrected fender stamping part are stable; and the comprehensive debugging method for eliminating the front protection distortion and springback of the fender stamping part by reasonably using the multi-dimensional mounting point compensation means. The front fender stamping part is effectively corrected to ensure the torsional springback, the debugging period is shortened, the data stability is improved, and the integral assembly quality of the automobile body is ensured.
Description
Technical Field
The invention relates to a method for optimizing the distortion of a front bumper lap joint area of a fender stamping part, which is suitable for the fields of assembly data improvement of the fender stamping part in an outer covering part of an automobile body and appearance quality optimization of a whole automobile.
Background
The method for improving and debugging the assembly data of the overlap joint area of the front bumper of the original fender punching part in the industry is characterized in that a designer carries out A-surface modification and contour modification on the data deviation of the overlap joint area of the front bumper of the fender punching part, the modified assembly data of the molded surface and the contour of the fender punching part is qualified, but the standard state of the A surface of a die is damaged, and the production stability of the die is seriously influenced. The original debugging method for the data of the front bumper lap joint area of the fender punching part can only optimize the assembling relation of the front bumper lap joint area of the fender punching part, the data deviation caused by the distortion of the front bumper lap joint area of the fender punching part can not be thoroughly eliminated, the reasonability and the stability of the single piece data of the fender punching part can not be ensured, and the integral assembling quality of an automobile body is further influenced.
Disclosure of Invention
The invention aims to solve the problem of integral assembly data of a vehicle body caused by the distortion of a front bumper lap area of a fender punching part, and provides a method for eliminating the distortion of the front bumper lap area of the fender punching part; by supplementing fillet compensation to the shaping process and utilizing the principle that the fillet is stably shaped through plastic deformation, the distortion of the lap joint area of the front bumper of the fender stamping part is effectively corrected; standardizing the symbol grinding direction to ensure that the lapping area of the front bumper of the corrected fender punching part is stably twisted; the comprehensive debugging method has the advantages that the multi-dimensional mounting point compensation means is reasonably used, and the distortion of the lap joint area of the front bumper of the fender punching part is eliminated.
The invention is realized by the following technical scheme:
a method for eliminating the distortion of a lap joint area of a front bumper of a fender punching part comprises the following specific steps:
a1, carrying out data measurement on the front bumper lapping area of the fender stamping part through precision measurement equipment;
a2, analyzing the data directionality by comparing all profile data in the overlapping area of the front bumper of the fender;
a3, confirming the correlation of each profile through the analyzed data directionality;
a4, compensating and correcting the rebound distortion state of the mounting surface of the lapping area of the front fender bumper by the process supplementary profile in the lapping area of the front fender bumper;
a5, after rebound and distortion of the mounting surface of the overlap joint area of the front fender bumper are eliminated, a piece is confirmed and data measurement is carried out on the overlap joint area of the front bumper of the fender punching part through precision measurement equipment;
a6, confirming the profile and the gap state of the lap joint area of the front bumper of the fender;
a7, analyzing the deviation direction and deviation amount of the mounting surface data of the lap joint area of the fender front bumper by comparing all the profile data in the lap joint area of the fender front bumper;
a8, carrying out interference procedure profile interference point elimination work on the mounting surface area of the lap joint area of the fender front bumper according to the analyzed deviation direction and deviation amount of the mounting surface data of the lap joint area of the fender front bumper, and correcting the forced deformation state of the mounting surface of the lap joint area of the fender front bumper in the opposite direction;
a9, removing the forced deformation state of the mounting surface area of the overlap joint area of the front fender bumper, then confirming the output of the assembly and carrying out data measurement on the overlap joint area of the front fender bumper of a fender stamping part through precision measurement equipment;
a10, confirming the profile and the gap state of the lap joint area of the front bumper of the fender;
a11, analyzing the assembling molded surface and the gap data deviation direction and deviation amount of the front fender bumper lap area through comparing all the molded surface data in the front fender bumper lap area;
a12, carrying out position correction work of the molded surface in the Y direction of the whole vehicle on the mounting surface area of the lap joint area of the fender front bumper according to the analyzed assembled molded surface of the lap joint area of the fender front bumper and the data deviation direction and deviation amount of the gap, and correcting the assembled molded surface and the gap deviation of the lap joint area of the fender front bumper in the opposite direction;
a13, confirming the assembly molded surface and gap deviation of the lapping area of the front fender bumper after optimizing, and carrying out data measurement on the lapping area of the front fender bumper of a fender punching part through precision measurement equipment;
a14, confirming the assembling molded surface and the gap state of the lap joint area of the front bumper of the fender;
and A15, analyzing the position of the deviation of the assembling profile and the clearance data of the lap area of the fender front bumper by comparing all the profile data in the lap area of the fender front bumper and finding out the deviation amount of the related installing point.
A16, according to the analyzed deviation amount of the installation point related to the position of the assembly profile and the gap data of the overlapping area of the front fender bumper, carrying out position correction work of the profile of the installation surface area of the overlapping area of the front fender bumper in the Z direction of the whole vehicle, and correcting the assembly profile and the gap deviation of the overlapping area of the front fender bumper in the opposite direction on the premise of ensuring the size;
a17, confirming the assembly molded surface and gap deviation of the lapping area of the front fender bumper after optimizing, and carrying out data measurement on the lapping area of the front fender bumper of a fender punching part through precision measurement equipment;
a18, confirming the assembling molded surface and the gap state of the lap joint area of the front bumper of the fender;
a19, compensating and correcting the rebound distortion state of the mounting surface of the lapping area of the front fender bumper by the process supplementary profile in the lapping area of the front fender bumper;
a20, carrying out position correction work of the molded surface of the mounting surface area of the lap joint area of the front fender bumper in the Y direction of the whole vehicle, wherein the flatness and the angle of the mounting surface of the lap joint area of the front fender bumper directly influence the mounting molded surface and the gap data of the lap joint area of the front fender bumper, so that the correction of the position data of the mounting surface of the lap joint area of the front fender bumper is embodied in the correction of the flatness and the angle, and the influence of the size of the mounting surface of the lap joint area of the front fender on the mounting molded surface and the gap data of the lap joint area of the front;
a21, carrying out position correction work of the contour of the mounting surface area of the front fender bumper lap area in the Z direction of the whole vehicle, and directly influencing the assembling profile and the gap data of the front fender bumper lap area by the positions of the upper and lower straight edges of the positioning contour line of the positioning hanging hole on the premise of ensuring the size of an icon H (the opening width of the positioning hanging hole in the Z direction of the whole vehicle) in fig. 6, so that the position correction of the contour of the hanging hole is reflected by the direction correction of the assembling profile and the gap data of the front fender bumper lap area, and the influence of the position size of the positioning hanging hole of the front fender bumper lap area on the assembling profile and the gap data of the front fender bumper lap area is eliminated;
a22, performing interference procedure profile interference point elimination work on the installation surface area of the overlapping area of the front fender bumper, eliminating profile interference to cause forced deformation of the installation surface of the overlapping area of the front fender bumper on the premise of ensuring the profile symbols of the upper and lower dies on the installation surface of the overlapping area of the front fender bumper, wherein the interference direction needs to be noticed when the interference point is corrected, and the upper die profile is corrected when the installation surface of the overlapping area of the front fender is upwarped; and correcting the molded surface of the lower die when the mounting surface of the lap joint area of the front fender bumper collapses so as to ensure that the rebound distortion of the mounting surface area of the lap joint area of the front fender bumper is stable.
Preferably, the data measurement of the fender front bumper overlapping area through the precision measuring equipment in the steps A1, A5, A9, A13 and A17 is carried out, and specifically, the surface difference size and the gap size related to the overlapping area of the fender front bumper are measured in a three-coordinate point-to-point mode, and the surface difference size and the gap size related to the position of the A surface of the overlapping area of the fender front bumper are measured by a laser scanner.
Preferably, the compensation in the step A4 is specifically to perform correlation compensation, grinding and correction on all data-related profiles and contours in the overlapping area of the front bumper of the fender, and the precision is 0.01mm-0.1 mm.
Preferably, the process complementary profile connecting main ridge line in the overlapping area of the front bumper of the fender is subjected to rounding treatment in the step A19, and different directions and uneven rebound existing on the mounting surface of the overlapping area of the front bumper of the fender are eliminated by enlarging or reducing the rounding, so that the abnormal rebound tendency of the mounting surface of the overlapping area of the front bumper of the fender is stabilized.
Compared with the prior art, the invention has the following advantages:
the comprehensive debugging method for eliminating the distortion of the lap joint area of the front bumper of the fender stamping part optimizes the distortion of the lap joint area of the front bumper of the fender, and is a comprehensive debugging method with the characteristics of precision, stable shaping, standardization, multiple dimensions and the like. The front bumper lap joint area distortion of the fender stamping part is effectively corrected, the debugging period is shortened, the data stability is improved, and the integral assembly quality of the automobile body is guaranteed. The method is applied to debugging of data of the lap joint area of the front bumper of the fender punching part of a vehicle type in a company at present, the distortion of the lap joint area of the front bumper of the fender punching part is eliminated, the production is verified in multiple batches, and the data is qualified and stable.
Drawings
In order to more clearly illustrate the detailed description of the invention or the technical solutions in the prior art, the drawings that are needed in the detailed description of the invention or the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.
FIG. 1 is a schematic diagram of three-dimensional measurement of the amount of twist in the overlap region of a front bumper of a fender stamping part according to the present invention;
FIG. 2 is a schematic diagram of a laser scanner measuring the amount of twist in the overlap area of a front bumper of a fender punch according to the present invention;
FIG. 3 is a schematic view of process compensation in the present invention;
FIG. 4 is a schematic view of an interference profile modification of the present invention;
FIG. 5 is a schematic diagram of compensation of a Y-direction mounting point of a whole vehicle in the invention;
FIG. 6 is a schematic view of compensation of a Z-direction mounting point of a whole vehicle.
In the figure: the method comprises the following steps of S, a three-coordinate measuring machine measuring head, F, a three-coordinate measuring machine measuring head contact point, M, a front bumper overlapping area surface area, J, a front bumper overlapping area inter-domain gap surface area, G, a laser scanner lens, A, a front bumper overlapping area upper portion mounting surface, B, a front bumper overlapping area lower portion mounting surface, T, a process supplementing profile in the front bumper overlapping area, 1, a process supplementing profile in the front bumper overlapping area links with a main ridge fillet external tangent point, 2, a main ridge fillet root tangent point of the process supplementing profile in the front bumper overlapping area, I, a connecting surface of the front bumper overlapping area upper portion mounting surface and lower portion mounting surface, C, a positioning hanging hole is on a closed edge in the X direction of a whole vehicle, D, a positioning hanging hole is on an upper straight edge of a Z-direction positioning contour line of the whole vehicle, E, a positioning hanging hole is on a lower straight edge of the Z-direction positioning contour line of the whole vehicle, and H, wherein the positioning hanging hole is in the.
Detailed Description
The following embodiments are only used for illustrating the technical solutions of the present invention more clearly, and therefore, the following embodiments are only used as examples, and the protection scope of the present invention is not limited thereby.
It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the invention pertains.
Example 1
Referring to fig. 1, 2, 3, 4, 5 and 6, data measurement is performed on a fender front bumper overlapping region by a precision measurement device (indicated by an icon M/J in fig. 1 and 2), after the data is obtained, the data directionality is analyzed for all profile data in the fender front bumper overlapping region, and the correlation of each profile in the fender front bumper overlapping region is confirmed according to the analyzed data directionality. Fillet compensation is performed on the process complementary profile (T in figure 3) in the overlap region of the fender front bumper to correct the rebound distortion state of the mounting surface (A/B in figure 3) in the overlap region of the fender front bumper. And (3) confirming the rebound and distortion elimination of the mounting surface of the lap joint area of the front fender bumper, and carrying out data measurement on the lap joint area of the front fender through a precision measuring device (shown as an M/J icon in figures 1 and 2). And analyzing the data deviation direction and deviation amount of the mounting surface of the lap joint area of the front fender bumper by comparing all the profile data in the lap joint area of the front fender bumper. According to the analyzed deviation direction and deviation amount of the installation surface data of the lap joint area of the fender front bumper, carrying out interference procedure profile interference point elimination work on the installation surface area of the lap joint area of the fender front bumper (an icon T/I in figure 4), and correcting the forced deformation state of the installation surface of the lap joint area of the fender front bumper (an icon A/B in figure 4) in the opposite direction. And (3) after the forced deformation state of the mounting surface area of the overlap joint area of the front fender bumper is eliminated, confirming the output of the assembly and carrying out data measurement on the overlap joint area of the front fender bumper by using precision measurement equipment (shown as an icon M/J in figures 1 and 2). The assembling molded surface and the gap data deviation direction and deviation amount of the lap joint area of the fender front bumper are analyzed by comparing all the molded surface data in the lap joint area of the fender front bumper. And (3) carrying out position correction work (shown by an icon A/B in figure 5) of the molded surface in the Y direction of the whole vehicle on the mounting surface area of the lap joint area of the fender front bumper according to the analyzed assembled molded surface of the lap joint area of the fender front bumper and the deviation direction and deviation amount of the gap data, and correcting the assembled molded surface and the gap deviation of the lap joint area of the fender front bumper (shown by an icon M/J in figure 5) in the opposite direction. And (3) after optimizing the assembling molded surface and the gap deviation of the overlapping area of the front fender bumper, determining the output of the parts and measuring data of the overlapping area of the front fender bumper of the fender punching part by using precision measuring equipment (shown as an icon M/J in figures 1 and 2). And analyzing the assembling molded surface and the gap data of the lap joint area of the fender front bumper by comparing all the molded surface data in the lap joint area of the fender front bumper, and finding out the deviation amount of the related mounting point. And (3) carrying out position correction work (an icon C/D/E in figure 6) of the contour of the mounting surface area of the lap joint area of the fender front bumper in the Z direction of the whole vehicle according to the analyzed position-related mounting point deviation amount of which the mounting surface area and the clearance data of the lap joint area of the fender front bumper still have deviation, and correcting the mounting surface area and the clearance deviation of the lap joint area of the fender front bumper (an icon M/J in figure 6) in the reverse direction on the premise of ensuring the size (an icon H in figure 6). And (3) after optimizing the assembling molded surface and the gap deviation of the overlapping area of the front fender bumper, determining the output of the parts and measuring data of the overlapping area of the front fender bumper of the fender punching part by using precision measuring equipment (shown as an icon M/J in figures 1 and 2). And confirming that the assembling molded surface and the gap of the lap joint area of the front bumper of the fender are qualified and stable. The data reasonability and stability of the surface difference and the gap of the lap joint area of the front bumper of the fender are improved, so that the integral assembly quality of a vehicle body is ensured.
In a1, a2, A3, a5, A6, a7, a9, a10, a11, a13, a14, a15, a17 and a18, the fender front bumper overlapping region is subjected to data measurement and analysis by a precision measuring device (three-coordinate point-to-point measurement of the face difference size and the gap size of the fender front bumper overlapping region, and laser scanner measurement of the face difference size and the gap size of the fender front bumper overlapping region and the a-plane position), and the measurement precision is 0.001 mm.
In A4, A8, A12 and A16, correlation compensation, grinding and correction are carried out on all profiles and contours related to data in a front bumper overlapping area of a fender, and the accuracy is 0.01mm-0.1 mm.
In a19, a20, a21 and a22, the standard symbol type grinding direction ensures the stable distortion of the lapping area of the front bumper of the modified fender punching part and the reasonable use of a multi-dimensional mounting point compensation means (the surface interference point elimination work is carried out in the mounting surface area of the lapping area of the front bumper of the fender, the compensation correction is carried out on the process supplement surface in the lapping area of the front bumper of the fender by connecting the fillet of a main ridge line, the correction of the flatness and the angle of the mounting surface of the lapping area of the front bumper of the fender and the position correction of the positioning hanging hole profile of the mounting surface of the lapping area of the front bumper of the fender), and the precision is 0.01mm-0.1 mm.
The comprehensive debugging method for eliminating the distortion of the lap joint area of the front bumper of the fender punching part optimizes the distortion of the lap joint area of the front bumper of the fender punching part, the distortion amount of the lap joint area of the front bumper of the fender punching part is confirmed by the matching use of precise measuring equipment, fillet compensation is supplemented to a shaping process, and the principle that the fillet plastic deformation shaping is stable is utilized, so that the distortion of the lap joint area of the front bumper of the fender punching part is effectively corrected, the character type grinding direction is standardized, the corrected distortion stability of the lap joint area of the front bumper of the fender punching part is ensured, the reasonable use of a multi-dimensional mounting point compensation means is realized, the debugging period is shortened, the data stability is improved.
The working process of the invention is as follows:
1) and (3) mounting the grinding symbol-shaped die on production equipment, and confirming that the state of parts in each process of the fender in the die is stable. And on the premise of stable forming of each process, taking out the whole process piece to perform the work of A1, A2 and A3.
2) The operation of a4 was performed based on all profile data of the overlap region of the fender front bumper.
3) The operation of A19 is carried out, and reasonable rounding compensation is carried out.
4) And (3) installing the mould with the completed process compensation on production equipment, and confirming the stable state of parts of each working procedure of the fender in the mould. And on the premise of stable forming of each process, taking out the whole process piece to perform the work of A5, A6 and A7.
5) The operation of A8 is performed based on the fender front bumper attachment area mounting face data.
6) The work of A22 was performed to reasonably eliminate the interference effect.
7) And (4) installing the mold with the interference points eliminated on production equipment, and confirming that the state of each process part of the fender in the mold is stable. And on the premise of stable forming of each process, taking out the whole process piece to perform the work of A9, A10 and A11.
8) And performing A12 operation according to the assembling molded surface of the front bumper lapping area of the fender and the deviation direction and the deviation amount of the clearance data.
9) The work of A20 is carried out, and the influence of the flatness and the angle of the installation surface is reasonably eliminated.
10) And (3) mounting the die with the corrected flatness and angle of the mounting surface on production equipment, and confirming that the parts in each process of the fender are stable in the die. And on the premise of stable forming of each process, taking out the whole process piece to perform the work of A13, A14 and A15.
11) And B, according to the assembling profile of the lap joint area of the fender and the position of the gap data, finding out the deviation amount of the related mounting point, and carrying out A16 operation.
12) And performing the work of A21, and reasonably correcting the contour position of the positioning hanging hole of the mounting surface.
13) And (3) mounting the die with the corrected contour position of the positioning hanging hole on the mounting surface on the production equipment, and confirming the stable state of parts in each process of the fender in the die. And on the premise of stable forming of each process, taking out the whole process piece to perform A17 and A18 operations.
14) And storing the related data records.
15) And verifying the reasonability and stability of data of the lap joint area of the front bumper of the fender in batch production.
16) And (4) loading to verify the reasonability and stability of the assembling data of the lap joint area of the front bumper of the fender.
The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention.
It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and the invention is not described in any way for the possible combinations in order to avoid unnecessary repetition.
In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.
Claims (4)
1. A method for eliminating the distortion of a lap joint area of a front bumper of a fender punching part is characterized by comprising the following specific steps:
a1, carrying out data measurement on the front bumper lapping area of the fender stamping part through precision measurement equipment;
a2, analyzing the data directionality by comparing all profile data in the overlapping area of the front bumper of the fender;
a3, confirming the correlation of each profile through the analyzed data directionality;
a4, compensating and correcting the rebound distortion state of the mounting surface of the lapping area of the front fender bumper by the process supplementary profile in the lapping area of the front fender bumper;
a5, after rebound and distortion of the mounting surface of the overlap joint area of the front fender bumper are eliminated, a piece is confirmed and data measurement is carried out on the overlap joint area of the front bumper of the fender punching part through precision measurement equipment;
a6, confirming the profile and the gap state of the lap joint area of the front bumper of the fender;
a7, analyzing the deviation direction and deviation amount of the mounting surface data of the lap joint area of the fender front bumper by comparing all the profile data in the lap joint area of the fender front bumper;
a8, carrying out interference procedure profile interference point elimination work on the mounting surface area of the lap joint area of the fender front bumper according to the analyzed deviation direction and deviation amount of the mounting surface data of the lap joint area of the fender front bumper, and correcting the forced deformation state of the mounting surface of the lap joint area of the fender front bumper in the opposite direction;
a9, removing the forced deformation state of the mounting surface area of the overlap joint area of the front fender bumper, then confirming the output of the assembly and carrying out data measurement on the overlap joint area of the front fender bumper of a fender stamping part through precision measurement equipment;
a10, confirming the profile and the gap state of the lap joint area of the front bumper of the fender;
a11, analyzing the assembling molded surface and the gap data deviation direction and deviation amount of the front fender bumper lap area through comparing all the molded surface data in the front fender bumper lap area;
a12, carrying out position correction work of the molded surface in the Y direction of the whole vehicle on the mounting surface area of the lap joint area of the fender front bumper according to the analyzed assembled molded surface of the lap joint area of the fender front bumper and the data deviation direction and deviation amount of the gap, and correcting the assembled molded surface and the gap deviation of the lap joint area of the fender front bumper in the opposite direction;
a13, confirming the assembly molded surface and gap deviation of the lapping area of the front fender bumper after optimizing, and carrying out data measurement on the lapping area of the front fender bumper of a fender punching part through precision measurement equipment;
a14, confirming the assembling molded surface and the gap state of the lap joint area of the front bumper of the fender;
and A15, analyzing the position of the deviation of the assembling profile and the clearance data of the lap area of the fender front bumper by comparing all the profile data in the lap area of the fender front bumper and finding out the deviation amount of the related installing point.
A16, according to the analyzed deviation amount of the installation point related to the position of the assembly profile and the gap data of the overlapping area of the front fender bumper, carrying out position correction work of the profile of the installation surface area of the overlapping area of the front fender bumper in the Z direction of the whole vehicle, and correcting the assembly profile and the gap deviation of the overlapping area of the front fender bumper in the opposite direction on the premise of ensuring the size;
a17, confirming the assembly molded surface and gap deviation of the lapping area of the front fender bumper after optimizing, and carrying out data measurement on the lapping area of the front fender bumper of a fender punching part through precision measurement equipment;
a18, confirming the assembling molded surface and the gap state of the lap joint area of the front bumper of the fender;
a19, compensating and correcting the rebound distortion state of the mounting surface of the lapping area of the front fender bumper by the process supplementary profile in the lapping area of the front fender bumper;
a20, carrying out position correction work of the molded surface of the mounting surface area of the lap joint area of the front fender bumper in the Y direction of the whole vehicle, wherein the flatness and the angle of the mounting surface of the lap joint area of the front fender bumper directly influence the mounting molded surface and the gap data of the lap joint area of the front fender bumper, so that the correction of the position data of the mounting surface of the lap joint area of the front fender bumper is embodied in the correction of the flatness and the angle, and the influence of the size of the mounting surface of the lap joint area of the front fender on the mounting molded surface and the gap data of the lap joint area of the front;
a21, carrying out position correction work of the contour of the mounting surface area of the overlapping area of the front fender bumper in the Z direction of the whole vehicle, and directly influencing the assembly profile and the gap data of the overlapping area of the front fender bumper by the positions of the upper and lower straight edges of the positioning contour line of the positioning hanging hole on the premise of ensuring the opening width size of the positioning hanging hole in the Z direction of the whole vehicle, so that the position correction of the contour of the hanging hole is realized according to the direction correction of the assembly profile and the gap data of the overlapping area of the front fender bumper, and the influence of the position size of the positioning hanging hole of the overlapping area of the front fender bumper on the assembly profile and the gap data of the overlapping area of the front fender is eliminated;
a22, performing interference procedure profile interference point elimination work on the installation surface area of the overlapping area of the front fender bumper, eliminating profile interference to cause forced deformation of the installation surface of the overlapping area of the front fender bumper on the premise of ensuring the profile symbols of the upper and lower dies on the installation surface of the overlapping area of the front fender bumper, wherein the interference direction needs to be noticed when the interference point is corrected, and the upper die profile is corrected when the installation surface of the overlapping area of the front fender is upwarped; and correcting the molded surface of the lower die when the mounting surface of the lap joint area of the front fender bumper collapses so as to ensure that the rebound distortion of the mounting surface area of the lap joint area of the front fender bumper is stable.
2. A method of removing a distortion in a fender post front bumper lap area according to claim 1, wherein the steps a1, a5, a9, a13 and a17 are performed by data measurement of the fender post front bumper lap area using precision measurement equipment, specifically three-coordinate point-to-point measurement of the face difference size and the gap size of the fender post front bumper lap area and laser scanner measurement of the face difference size and the gap size of the fender post front bumper lap area relative to the a-face position.
3. The method of claim 1, wherein the compensation of step a4 is performed by performing correlation compensation, grinding and correction on all data-related profiles and contours in the overlapping area of the fender front bumper to a precision of 0.01mm to 0.1 mm.
4. The method for eliminating the distortion of the lap area of the front bumper of a fender punching part according to claim 1, wherein the step A19 of rounding the joint main ridge line of the process complementary profile in the lap area of the front bumper of the fender is carried out, and the different directions and the uneven rebound existing on the installation surface of the lap area of the front bumper of the fender are eliminated by enlarging or reducing the round angle, so that the abnormal rebound tendency of the installation surface of the lap area of the front bumper of the fender is stabilized.
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