A method for compensating processing of a driving surface of a trimming die slide block

Abstract

The application provides a trimming die sliding block driving surface compensation processing method, which comprises S1 die closing finishing, S2 measurement, S3 measurement result analysis and S4 compensation method. By comparing the calculated deviation of the profile and the calculated deviation of the driving guide surface, three results appear: ① the difference between the calculated deviation of the profile and the calculated deviation of the driving guide surface is within a certain range of positive and negative values, so that the relative position of the profile-edge-driving surface can be considered to be within the tolerance range; ② the calculated deviation of the profile minus the calculated deviation of the driving guide surface is greater than a certain value, so that the relative size of the side trimming edge of the lower die and the driving surface is greater than the theoretical size; ③ the calculated deviation of the driving guide surface minus the calculated deviation of the profile is greater than a certain value, so that the relative size of the side trimming edge of the lower die and the driving surface is less than the theoretical size. Different processing schemes are implemented on the driving surface according to the three results in S3.

Description

Technical Field

[0001] This invention relates to the field of automotive mold processing technology, and more specifically, to a method for compensating the driving surface of a trimming mold slider. Background Technology

[0002] In automotive body panel mold design, due to factors such as body panel shape, mold size, and stamping scheme, there are a large number of molds that utilize sliders to achieve non-90° trimming functions; these are collectively referred to as "side trimming molds." The position of the side trimming mold's profile, the closed dimensions of the upper and lower molds, the trimming edge clearance, and the dimensions of the slider drive guide surface are closely related to the movement process and functional requirements of the side trimming mold, and the adjustment tolerance requirements are high (the edge clearance adjustment is only 0.03–0.05 mm). The mainstream machining scheme for side trimming molds is: single-piece precision machining of the slider drive guide surface on the lower mold base; precision machining of the mold base's limiter position and the lower mold surface during mold closing; precision machining of the lower mold edge during mold closing (or single-piece precision machining after alignment using the mold closing machining datum); and precision machining of the cutting edge and drive surface after the slider and upper mold base are closed. However, during mold manufacturing, the mold profile is often lowered during machining due to casting deformation, surface inclusions, machining errors, design changes, etc. Once it falls, it changes the closed dimensions of the upper and lower dies, and the sliding state and the relative dimensions of the side cutting edge will also change accordingly.

[0003] Currently, the compensation machining for the lower model surface of the side trimming die after it has fallen is done by determining the fall value based on the lower model surface, and then simultaneously falling the stroke limit table, the side trimming cutting edge, and the slider drive surface on the lower die holder (as shown in the attached figure). Figure 1 This compensation method provides a high degree of accuracy in restoring the relative positions of the upper and lower dies, sliders, and cutting edges, but it has the following drawbacks: 1. Due to the high flatness requirements of the driving surfaces on the mold base, the feed rate for the corner finishing cannot be too fast, resulting in a long machining time. Typically, machining each driving surface requires 20-25 minutes; 2. The slider driving surfaces of most side trimming dies cannot be directly machined in the mold-closed state (as shown in the attached figure). Figure 2 1) The mold needs to be moved away from the processing equipment, the punch needs to be disassembled, and the mold base needs to be re-processed. The time spent on mold transfer and disassembly is long. 2) The recording and transmission of the mold surface drop relies on operator handover. Due to mold transfer and processing equipment changes, any omissions in the handover or errors in the transmission of the drop amount will lead to errors in subsequent compensation processes, resulting in excessive mold closing clearance. Clearly, this simple but inefficient and unstable processing information transmission and compensation scheme does not meet the quality and cycle requirements of modern mold manufacturing. Summary of the Invention

[0004] The purpose of this invention is to reduce the amount of compensation work required after the lower mold surface of the side trimming mold falls down, thereby improving mold manufacturing efficiency, without increasing the workload of technicians or ensuring mold closing accuracy.

[0005] The embodiments of the present invention are achieved through the following technical solutions:

[0006] A method for compensating the driving surface of a trimming die slider, comprising:

[0007] S1 mold closing and finishing: Machining the lower mold base's mold closing surface, cutting edge, and limiter table. If there is any falling during machining, the mold surface, cutting edge, and limiter table will all fall simultaneously on the same machine.

[0008] S2 Measurement: The profile, cutting edge, and drive guide surface of the machined lower die holder are measured on a CNC machine. The calculated deviation in the measurement result is the deviation between the actual measurement result and the theoretical value of the detected feature. The calculated deviation is used to determine whether the machining is in place.

[0009] S3 Measurement Result Analysis: By comparing the calculated deviation of the profile and the calculated deviation of the drive guide surface, three results are observed: ① If the difference between the calculated deviation of the profile and the calculated deviation of the drive guide surface is within a certain positive and negative range, it can be considered that the relative position of the profile-cutting edge-drive surface is within the tolerance range; ② If the calculated deviation of the profile minus the calculated deviation of the drive guide surface is greater than a certain value, then the relative size of the side cutting edge of the lower die and the drive surface is greater than the theoretical size; ③ If the calculated deviation of the drive guide surface minus the calculated deviation of the profile is greater than a certain value, then the relative size of the side cutting edge of the lower die and the drive surface is less than the theoretical size.

[0010] S4 Compensation Method: Different processing schemes are implemented for the three results in S4. ① No processing is done for the first result in S4. ② For the second result in S4, shims are added to compensate the mounting surface of the slider drive guide plate. ③ For the third measurement result in S4, the mounting surface of the slider drive guide plate is machined in equal quantities according to the difference between the calculated deviation of the profile and the calculated deviation of the drive guide surface, and no further compensation processing is performed.

[0011] Furthermore, the method for determining whether the processing is in place by calculating the deviation in S2 is as follows: when the calculated deviation is positive, it indicates that the detected feature has not been processed in place; when the calculated deviation is negative, it indicates that the detected feature has been overcut.

[0012] Furthermore, it also includes

[0013] S2.1: Judgment of the result of the surface to be processed: By analyzing the measurement results, if the data of the calculated deviation in the measurement result of the surface exceeds the positive deviation, the surface processing is not in place; if the data exceeds the negative deviation, the surface processing is incomplete. The measurement result of the drive guide surface also reflects whether the drive guide surface is processed in place or whether there is overcutting.

[0014] Furthermore, the measurement used in S2 is an online measurement technology, and the measurement equipment of the online measurement technology is connected to the server through software.

[0015] Furthermore, the server is connected to the computer via a network.

[0016] Furthermore, the value in S3 is 0.1 mm.

[0017] Furthermore, the shim compensation in S4 involves fabricating shims of equal thickness based on the difference between the calculated deviation of the profile and the calculated deviation of the drive guide surface, and then shimming the mounting surface of the slider drive guide plate to compensate for the difference.

[0018] The technical solutions of the embodiments of the present invention have at least the following advantages and beneficial effects:

[0019] 1. In conventional machining processes, the upper die slider requires machining of the driving surface and cutting edge. This method, while ensuring the proper relationship between the upper and lower die surfaces, cutting edge, and driving mechanism, only increases the time required for online measurement and data processing by the process engineer. It saves the time spent on mold hoisting, transportation, disassembly, and CNC machining required for reworking the lower die's driving guide surface. This significantly shortens the time required for compensation machining of the side trimming die after it has been lowered.

[0020] The invention will become clearer from the following description, taken in conjunction with the accompanying drawings, which are used to explain embodiments of the invention. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the key features of the trimming die lower mold in Embodiment 1 of the present invention;

[0023] Figure 2 This is a schematic diagram of interference during mold closing machining on the mold base drive surface.

[0024] Figure 3 Demonstrates the online measurement program;

[0025] Figure 4 For displaying online measurement results;

[0026] Figure 5 This is a schematic diagram of the side trimming mold assembly structure. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0029] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0030] In the description of this invention, it should be noted that if terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use, they are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0031] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0032] Example

[0033] A method for compensating the driving surface of a trimming die slider, comprising:

[0034] S1 mold closing and finishing: Machining the lower mold base's mold closing surface, cutting edge, and limiter table. If there is any falling during machining, the mold surface, cutting edge, and limiter table will all fall simultaneously on the same machine.

[0035] S2 Measurement: Utilizing online measurement technology, the profile, cutting edge, and drive guide surface of the machined lower die holder are measured on a CNC machine. The calculated deviation in the measurement result represents the difference between the actual measurement result and the theoretical value of the detected feature. This calculated deviation is used to determine whether the machining is complete. The online measurement equipment is connected to a server via software, and the server is connected to a computer via a network to send notifications to process technicians. A positive calculated deviation in the measurement result indicates that the detected feature was not machined to its full extent, while a negative value indicates that the detected feature has been over-cut.

[0036] S2.1 Judgment of the result of the surface to be processed: By analyzing the measurement results, if the data of the calculated deviation in the measurement result of the surface exceeds the positive deviation, the surface processing is not in place; if the data exceeds the negative deviation, the surface processing is incomplete. The measurement result of the drive guide surface also reflects whether the drive guide surface is processed in place or whether there is overcutting.

[0037] S3 Measurement Result Analysis: By comparing the calculated deviation of the profile and the calculated deviation of the drive guide surface, three results are observed: ① If the difference between the calculated deviation of the profile and the calculated deviation of the drive guide surface is within ±0.1mm, it can be considered that the relative position of the profile-cutting edge-drive surface is within the tolerance range; ② If the calculated deviation of the profile minus the calculated deviation of the drive guide surface is greater than 0.1mm, then the relative size of the side trimming cutting edge of the lower die and the drive surface is greater than the theoretical size; ③ If the calculated deviation of the drive guide surface minus the calculated deviation of the profile is greater than 0.1mm, then the relative size of the side trimming cutting edge of the lower die and the drive surface is less than the theoretical size.

[0038] S4 Compensation Method: Different processing schemes are implemented for the three results in S4 on the driving surface. ① No processing is performed for the first result of S4. The difference in the calculated deviation of the first result of S4 is within ±0.1mm, and the drop amount is insufficient to cause error, so no processing is performed. ② For the second result of S4, shims are added to compensate the mounting surface of the slider drive guide plate. If the calculated deviation of the profile minus the calculated deviation of the drive guide surface is greater than 0.1mm, then... Figure 5 As shown, based on the difference between the "surface deviation" and the "drive deviation", shims of equal thickness are made to compensate for the sliding block drive guide plate mounting surface. ③ Based on the third measurement result in S4, according to the difference between the calculated deviation of the surface and the calculated deviation of the drive guide surface, the sliding block drive guide plate mounting surface is machined to the same amount, without further compensation machining.

[0039] Since the upper mold slider requires machining of the driving surface and cutting edge in the conventional machining process, this method, while ensuring the relationship between the upper and lower mold surfaces, cutting edge, and driving edge of the side trimming mold, only increases the time for online measurement and data processing by the process programmer. Deviations are calculated through online measurement, and compensation or equivalent machining is performed based on the difference in the calculated deviations. This saves the time required for mold hoisting, transportation, disassembly, and CNC machining that would otherwise be needed for reworking the lower mold's driving guide surface. It also significantly shortens the time required for compensation machining of the side trimming mold after it has been lowered.

[0040] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A method of trimming die slide driving face compensation machining, characterized in that, It comprises the following steps: S1 mold finishing: lower mold base mold processing surface, edge, limiter mesa, during processing, if there is a drop, the surface, edge, limiter mesa will be completed simultaneously on the same equipment drop; S2 measurement: measuring the surface, edge and driving guide surface of the processed lower mold base on the numerical control equipment, the calculation deviation in the measurement result is the deviation of the actual result of the measurement and the theoretical value of the detected feature, and the calculation deviation is used to judge whether the processing is in place; S3 measurement result analysis: by comparing the calculation deviation of the surface and the calculation deviation of the driving guide surface, three results appear: ① the difference between the calculation deviation of the surface and the calculation deviation of the driving guide surface is within a certain range of positive and negative values, then the relative position of the surface-edge-driving surface can be considered within the tolerance range; ② the calculation deviation of the surface minus the calculation deviation of the driving guide surface is greater than a certain value, then the relative size of the side trimming edge of the lower mold and the driving surface is greater than the theoretical size; ③ the calculation deviation of the driving guide surface minus the calculation deviation of the surface is greater than a certain value, then the relative size of the side trimming edge of the lower mold and the driving surface is less than the theoretical size; S4 compensation method: for the three results in S3, different processing schemes are implemented for the driving surface, ① for the first result of S4, no processing is done; ② for the second result of S4, pad compensation is performed on the sliding block driving guide plate mounting surface; ③ for the third measurement result in S4, according to the difference between the calculation deviation of the surface and the calculation deviation of the driving guide surface, the sliding block driving guide plate mounting surface is processed by an equal amount, and no compensation processing is performed.

2. The method of claim 1, wherein the method further comprises: The way of judging whether the processing is in place in S2 is that the calculation deviation is positive, indicating that the detected feature has not been processed in place, and the calculation deviation is negative, indicating that the detected feature has been overcut.

3. The trimming die slider drive surface compensation processing method according to claim 2, characterized in that, It also includes: S2.1: result judgment of surface to be processed: by analyzing the measurement results, when the data of the calculation deviation in the measurement results of the surface exceeds the positive difference, the surface processing is not in place; if the data exceeds the negative difference, the surface processing exists drop, and the measurement results of the driving guide surface also reflect whether the driving guide surface is processed in place or exists overcut.

4. The method of claim 1, wherein the method further comprises: The measurement in S2 is online measurement technology, and the measurement equipment of the online measurement technology is connected with the server through software.

5. The method of claim 4, wherein the driving surface of the slide block is machined to compensate for the offset of the driving surface of the slide block from the driving surface of the die. The server is connected with the computer through the network.

6. The method of claim 1, wherein the method further comprises: The certain value in S3 is 0.1mm.

7. The method of claim 1, wherein the method further comprises: The pad compensation in S4 is to make a pad with an equal thickness according to the difference between the calculation deviation of the surface and the calculation deviation of the driving guide surface, and the pad compensation is performed on the sliding block driving guide plate mounting surface.

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