Stamping debugging detection method for complex part of automobile body covering part
By re-establishing the debugging and testing benchmark system for complex parts of automobile body panels, the impact of traditional testing benchmark errors on mold debugging has been solved, and a shorter debugging cycle, lower mold rectification difficulty, and higher component profiles have been achieved. Accuracy.
Patent Information
- Application Number
- CN202411261140.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-10
- Publication Date
- 2025-01-24
AI Technical Summary
The detection reference error of complex parts of traditional automobile body covers has an impact on mold debugging, resulting in extended debugging cycle, increased difficulty in mold rectification and high manufacturing costs.
Re -establish the debugging and detection benchmark system, cancel the three RPS dots used in the original component inspection system to restrain the parts Z, and add two debugging benchmark areas to the part of the parts Y to the I area. As a debugging positioning benchmark, for the zoning X direction and Z direction to reset verification.
It effectively reduces the instability and springback problems of parts during stamping, shortens the debugging cycle by more than 13%, reduces the difficulty of mold rectification and manufacturing costs, and improves the surface accuracy and detection status accuracy of parts.
Smart Images
Figure CN119354112A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of automobile stamping parts, and in particular relates to a stamping debugging and testing method for complex parts of automobile body covering parts. Background Art
[0002] As the development cycle of the global automotive industry is shortened dramatically, the development cycle of automotive stamping parts is also forced to be compressed, and the quality requirements of automotive stamping parts are getting higher and higher, which also forces the development cycle of automotive stamping parts stamping dies to be more tense. However, the benchmark design of some automotive stamping parts is based on vehicle assembly, and there is not much consideration for debugging needs. Therefore, the need to add a debugging and detection benchmark system during the debugging process of automotive stamping parts stamping dies is very urgent. Summary of the invention
[0003] The purpose of the present invention is to provide a stamping debugging and detection method for complex parts of automobile body coverings, which is mainly used for debugging and detection in the development process of stamping parts in the automobile body covering complex parts industry, solves the influence of the traditional automobile body covering complex parts detection benchmark error on mold debugging, effectively shortens the debugging cycle of automobile body covering complex parts, reduces the difficulty of mold rectification, and saves mold manufacturing costs.
[0004] The technical solution adopted by the present invention to solve the technical problem is as follows:
[0005] The present invention provides a method for stamping, debugging and testing complex parts of automobile body covering parts, which specifically comprises the following steps:
[0006] The debugging and inspection reference system is re-established, the three RPS points (C1, C2 and C3) used to constrain the parts in the Z direction in the parts inspection system are cancelled, two debugging reference areas (G1 and G2) are added in the I area of the parts in the Y direction, and two CH holes (13) are set on the parts as debugging positioning references for the parts to be reset and verified in the X and Z directions; the positioning pins in the two reference holes (D1 and D2) used to restrict the parts in the X and Y directions in the original parts inspection system are cancelled.
[0007] As a preferred embodiment, the debugging and detection reference system includes: six RPS points (A1, A2, A3, A4, B1 and B2), two debugging reference areas (G1 and G2) and two CH holes (13); the RPS points (A1, A2, A3, A4) are used to constrain the Y direction of the component; the RPS points (B1 and B2) are used to constrain the X direction of the component.
[0008] As a preferred implementation, during testing, the test fixture (12) is rearranged according to the debugging test reference system, and a test fixture (12) is arranged corresponding to each RPS point, each debugging reference area and each CH hole.
[0009] As a preferred implementation, the component inspection system uses 4 RPS points (A1, A2, A3 and A4) to constrain the Y direction of the component, 2 RPS points (B1 and B2) to constrain the X direction of the component, 3 RPS points (C1, C2 and C3) to constrain the Z direction of the component, and two reference holes (D1 and D2) to limit the X and Y directions of the component.
[0010] The beneficial effects of the present invention are:
[0011] The present invention provides a stamping debugging and testing method for complex parts of automobile body panels, which is mainly used in the debugging and testing procedures in the development process of stamping parts in the complex parts industry of automobile body panels. The present invention establishes a debugging and testing benchmark system before debugging and testing, which can effectively reduce the instability and rebound problems of parts during stamping, solves the influence of the traditional automobile body panel complex parts detection benchmark error on mold debugging, and effectively shortens the debugging cycle of automobile body panel complex parts by more than 13%.
[0012] The springback data reflected by the parts under the debugging and testing benchmark system re-established by the present invention is more realistic. The surface accuracy of the parts can reach the quality indicators required by the project through one rectification. The accuracy difference when switching to the part detection state is also very small, which shortens the mold rectification time, reduces the difficulty of mold rectification, and saves the mold manufacturing cost. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 It is a schematic diagram of the detection status of the component inspection system based on the vehicle body position.
[0014] Figure 2 This is a schematic diagram of the stamping state of the stamping die for automobile stamping parts.
[0015] Figure 3 A schematic diagram of the structure of the fender.
[0016] Figure 4 A schematic diagram of the structure of the fender.
[0017] Figure 5 It is a schematic diagram of the FF cross section on the overlapping side of the fender hood.
[0018] Figure 6 This is a blue light scanning fitting data analysis diagram of the fender profile.
[0019] Figure 7The free rebound and clamped rebound analysis diagrams of the fender. In the figure, (a) is the free rebound state of the fender; (b) is the clamped rebound state of the fender.
[0020] Figure 8 The fender rebound analysis diagram is shown in Figure 1. (a) is the fender rebound state after debugging and (b) is the fender rebound state after compensation.
[0021] Fig. 9 The schematic diagram of the layout of the inspection fixture is shown in Figure 2.
[0022] In the figure, 1. component inspection fixture detection system, 2. automobile component, 3. automobile stamping component stamping die, 4. fender, 5. reference positioning state of component inspection fixture detection system 1 (before debugging reference conversion), 6. original state of fender 4, 7. reference positioning state of debugging detection reference system (after debugging reference conversion), 8. RPS point area before debugging reference conversion, 9. RPS point area after debugging reference conversion, 10. appearance surface, 11. flange surface, 12. inspection fixture, 13. CH hole. DETAILED DESCRIPTION
[0023] The present invention is further described in detail below in conjunction with the accompanying drawings.
[0024] In the prior art, the specific impact of the debugging and testing benchmark on the debugging of stamping dies for automobile stamping parts is as follows:
[0025] like Figure 1 and Figure 2 As shown in the figure, due to the complex shape and insufficient rigidity of the automobile body cover parts, its deformation and rebound are difficult to control. Figure 1 ) and the stamping state of the stamping die 3 of the automobile stamping parts ( Figure 2 ) There are inconsistencies, and there is also the influence of gravity. Therefore, in the early stages of the development of automotive parts 2, it is necessary to consider the factors affecting the accuracy of parts detection and the establishment of a debugging and detection benchmark system.
[0026] Take the fender 4 which is difficult to locate among the complex parts of the automobile body cover as an example. Figure 3 and Figure 4As shown, the existing vehicle body position-based component inspection system 1 mainly uses 4 RPS (reference point system) points (A1, A2, A3 and A4) to constrain the Y direction of the fender 4, 2 RPS points (B1 and B2) to constrain the X direction of the fender 4, and 3 RPS points (C1, C2 and C3) to constrain the Z direction of the fender 4. Since the surface where the RPS points are located is not an absolute plane, the positioning stability is limited. Therefore, the method of adding two reference holes (D1 and D2) is adopted to improve the positioning accuracy of the fender 4 in the X and Y directions.
[0027] like Figure 5 As shown, 5 is the reference positioning state of the component inspection fixture detection system 1 (before the debugging reference conversion), 6 is the original state of the fender 4, 7 is the reference positioning state of the debugging detection reference system (after the debugging reference conversion), 8 is the RPS point area before the debugging reference conversion, 9 is the RPS point area after the debugging reference conversion, 10 is the appearance surface, and 11 is the flange surface. Since the component inspection fixture detection system 1 locates the vehicle body position coordinates during detection, it is greatly affected by the overall rigidity and gravity of the fender 4. In addition, the release of the internal stress of the fender 4 causes the fender 4 reference surface to rebound significantly. When the reference surface of the component inspection fixture detection system 1 fits the reference surface of the fender 4, the relative position relationship between the component inspection fixture detection system 1 and the fender 4 changes. The measurement score of the fender 4 positioned in this state is low, and the positioning accuracy data is distorted.
[0028] To solve the above problems, the present invention adopts a method of re-establishing a debugging and detection benchmark system, such as Figure 6 As shown in the figure, through the analysis of the blue light scanning fitting data of the fender 4 surface, the deformation of area I in the Y direction is small. According to the principle of debugging benchmark conversion, cancel Figure 4 The RPS points C1, C2 and C3 established in the 4 are set, and two debugging reference areas G1 and G2 are added in the Y direction I area of the fender 4 to complete the debugging reference conversion. At the same time, in order to ensure the consistency of the debugging reference, two CH holes 13 (check holes, debugging process holes) are set on the fender 4 as debugging positioning references to perform X-direction and Z-direction reset verification; at the same time, the positioning pins in the reference holes D1 and D2 that limit the X and Y directions are removed to avoid over-positioning, and at the same time, stress can be released to truly reflect the rebound state of the fender 4, so as to improve the accuracy of positioning measurement data.
[0029] The specific positions of the debugging reference areas G1 and G2 are respectively located in the Y direction I area of the fender 4 .
[0030] The present invention can obtain a component status that is closer to the actual state by re-establishing the debugging and testing reference system. Figure 5As shown, before the debugging reference is converted, due to the influence of the overall rigidity and gravity of the fender 4 and the release of internal stress, the rebound of the reference surface of the fender 4 is more obvious. When the reference surface of the component inspection fixture detection system 1 is in contact with the reference surface of the fender 4, the relative position relationship between the reference positioning state 5 of the component inspection fixture detection system 1 and the original state 6 of the fender 4 has changed. The measurement score of the fender 4 positioned in this state is low, and the positioning accuracy data is distorted. After the debugging and detection reference system is re-established, the reference surface and the size of the reference hole on the lap side of the engine cover of the fender 4 can be re-measured, and the stamping die 3 of the automobile stamping parts can be rectified accordingly. On the basis of ensuring the consistency of the position of the CH hole 13, the re-established debugging and detection reference system can be applied to other characteristic areas of the fender 4, and the front bumper lap position, the A-pillar lap position and the door sill hanging hole position can be measured and rectified respectively, and the positioning measurement accuracy of the full surface of the fender 4 can be gradually improved.
[0031] In addition, the best application stage of the debugging and testing benchmark system re-established by the present invention is in the early design stage of parts and components, which can effectively reduce the instability and springback problems of parts and components during stamping. In the stamping process design stage, the debugging benchmark needs to be converted, and in the actuarial stage, the forming conditions of the parts and components are virtually debugged and simulated through analysis software to verify the correctness of the established debugging and testing benchmark system.
[0032] In order to further verify the feasibility of the stamping, debugging and testing method for complex parts of automobile body covering parts of the present invention, the following experimental analysis is carried out.
[0033] (1) Solving the free rebound state of the fender 4;
[0034] like Figure 7 As shown in (a), the springback tolerance of the flange surface 11 where the reference is located is obvious, which is also the actual state of the fender 4 assembled by screw connection.
[0035] (2) According to the fender GD&T benchmark requirements, the fender 4 is clamped and positioned. The clamping state after positioning is significantly different from the free state, such as Figure 7 As shown in (b), the rebound value of the flange surface 11 on the overlapping side of the engine hood and the overlapping side of the front bumper is within the tolerance zone of ±0.5mm, but the A surface, i.e., the appearance surface 10, which is the overlapping area with the headlight and the engine hood, has collapsed on a large scale. If the digital model component surface is modified according to such analysis results, multiple forming processes will be associated, and the A surface needs to be reconstructed on a large scale, which is very time-consuming.
[0036] (3) According to the establishment principle of the debugging test benchmark system, the debugging benchmark is converted to obtain the rebound data under the stable clamping state, such as Figure 8As shown in (a), the rebound condition of the fender 4 after the debugging and testing benchmark system is consistent with the free rebound condition of the fender 4, and the rebound data are closer.
[0037] The debugging and testing benchmark system established in the present invention not only takes into account the influence of stress and strain, but also the influence of gravity, which is used as a compensation basis to modify the surface of the digital model parts. The results after re-analysis are as follows: Figure 8 As shown in (b), the result is in line with expectations.
[0038] Therefore, the debugging and detection reference system re-established by the present invention mainly includes: 6 RPS points (A1, A2, A3, A4, B1 and B2), 2 debugging reference areas (G1 and G2) and 2 CH holes 13, while the positioning pins in the reference holes D1 and D2 that limit the X and Y directions are cancelled.
[0039] Among them, RPS points A1, A2, A3, and A4 are mainly used to constrain the Y direction of the fender 4, RPS points B1 and B2 are mainly used to constrain the X direction of the fender 4, and the two CH holes 13 are mainly used as debugging positioning references for performing X-direction and Z-direction reset verification of the fender 4.
[0040] Based on the above analysis, the layout position of the inspection fixture 12 is reset, specifically: 8 inspection fixtures 12 are arranged corresponding to the 8 RPS points in the debugging and testing benchmark system, such as Fig. 9 Thanks to the consistency between the theoretical analysis of the parts and the actual rebound state under the debugging and testing benchmark system, the fender 4 is stable on the 8 rearranged inspection fixtures 12, and the first inspection pass rate exceeds 85%.
[0041] The springback data reflected by the parts under the debugging and testing benchmark system re-established by the present invention is more realistic. The surface accuracy of the parts can reach the quality indicators required by the project through one rectification. The accuracy difference when switching to the part detection state is also very small, which shortens the mold rectification time, reduces the difficulty of mold rectification, and saves the mold manufacturing cost.
[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein, but these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims
1. A stamping and debugging test method for complex parts of automobile body panels, characterized in that: The following steps are involved: Re-establish the debugging and testing reference system, cancel the three RPS points (C1, C2 and C3) used to constrain the components in the Z direction in the component inspection system, add two debugging reference areas (G1 and G2) in the Y direction I area of the component, and set up two CH holes (13) on the component as debugging positioning references for component X and Z direction reset verification; The positioning pins in the two reference holes (D1 and D2) used to limit the parts in the X and Y directions in the original parts inspection system are eliminated.
2. The method for stamping, debugging and testing complex parts of automobile body panels according to claim 1 is characterized in that: The debugging and testing reference system comprises: six RPS points (A1, A2, A3, A4, B1 and B2), two debugging reference areas (G1 and G2) and two CH holes (13); the RPS points (A1, A2, A3, A4) are used to constrain the Y direction of the parts; and the RPS points (B1 and B2) are used to constrain the X direction of the parts.
3. The stamping, debugging and testing method for complex parts of automobile body panels according to claim 2 is characterized in that: During the inspection, the inspection fixture (12) is rearranged according to the debugging inspection reference system, and one inspection fixture (12) is arranged corresponding to each RPS point, each debugging reference area and each CH hole.
4. The method for stamping, debugging and testing complex parts of automobile body panels according to claim 1, characterized in that: The component inspection system uses 4 RPS points (A1, A2, A3 and A4) to constrain the Y direction of the component, 2 RPS points (B1 and B2) to constrain the X direction of the component, 3 RPS points (C1, C2 and C3) to constrain the Z direction of the component, and two reference holes (D1 and D2) to limit the X and Y directions of the component.