CN-115921686-B - Technological method for improving post-process character type problem of stamping die

Abstract

The invention provides a process method for improving the post-process character type problem of a stamping die, which comprises the following steps of cutting a first part by laser, judging whether the stamped drawing part meets the qualification rate requirement, locking the drawing part on a drawing part to stamp a C/H hole, placing the drawing part on an OP20 die, placing the drawing part on the OP20 die to carry out blue light scanning, inputting scanning point cloud into a process number type, adjusting in the Z direction and comparing the process number type, carrying out die face compensation on the process number type according to point cloud data, and carrying out secondary processing on the molded surface of the OP20 die. The invention has the beneficial effects that the invention is also suitable for the symbol-shaped work of other working procedures and is effective through a plurality of item verification. The method can well solve the character-shaped problem of the working procedure piece on the die, and creates necessary conditions for guaranteeing that the qualified and stable stamping piece is finally stamped.

Inventors

• YIN YONGDUO
• KUANG YA

Assignees

• 泊头市兴达汽车模具制造有限公司

Dates

Publication Date

20260505

Application Date

20221207

Claims (4)

1. 1. A process method for improving the post-process character type problem of a stamping die is characterized by comprising the following steps: S1, cutting and punching a first part by laser to obtain a cut drawing part because the quality of an OP20 trimming model has a large influence on a final result; s2, punching the cut drawing piece, judging whether the punched drawing piece meets the qualification rate requirement and is locked by drawing, if so, entering a step S3, otherwise, entering an end; S3, stamping a C/H hole (4) on a drawing piece, matching the C/H hole (4) with a C/H positioning hole on an OP20 die (1), placing the drawing piece on the OP20 die (1), and positioning the drawing piece on the OP20 by adopting the C/H hole; S4, placing the drawing piece on an OP20 die (1) for blue light scanning; S5, inputting the scanning point cloud into a process model, adjusting in the Z direction, comparing the scanning point cloud with the process model, and performing die face compensation on the process model according to the point cloud data; S6, carrying out secondary processing on the molded surface of the OP20 mold (1) according to the number of OP20 processes, wherein before the drawing piece is placed on the OP20 mold (1) to carry out blue light scanning in the step S4, the OP20 mold (1) is placed on a standard platform or a blue light workbench to carry out scanning; The drawing piece in the step S4 is placed on the OP20 die (1) to carry out blue light scanning, and comprises the following steps: S41a, searching point positions on the OP20 mould (1) according to a blue light scanning best fitting result; s42a, selecting support cushion blocks (2) with different thicknesses according to the deformation of the drawing piece; S43a, placing the support cushion blocks (2) at the male die points of the OP20 die (1) in the step S41a, wherein the number of the support cushion blocks (2) is 3-4, searching for the position placement cushion blocks with smaller rebound according to the best fitting result of blue light scanning in the correction process of the drawing piece before scanning, and selecting the support cushion blocks (2) with different thicknesses according to the deformation of the drawing piece; when the drawing piece in the step S4 is placed on the OP20 die (1) to carry out blue light scanning, the drawing piece comprises the following steps: s41b, firstly scanning 3 reference holes (3) of the OP20 die (1); s42b, finding the center of the OP20 die (1) according to the reference hole (3), establishing an XYZ coordinate system, guaranteeing the corresponding relation between the scanning point cloud and the die coordinates, and providing convenience for point cloud input and stamping process comparison; S43b, performing blue light scanning; the C/H positioning hole on the OP20 die (1) is positioned on the X coordinate axis of the OP20 die (1); the three reference holes (3) of the OP20 die (1) are respectively positioned on an X coordinate axis and a Y coordinate axis of the OP20 die (1); According to the compensation cloud image and UG data superposition contrast image after the blue light point cloud is compensated for the OP20 process type, the final compensation data is superposed and compared with the original data, the total qualification rate of the manufactured piece is more than 95% after rectification, the critical dimension qualification rate is 100%, and the customer requirement is completely met; C/H hole positioning scanning, padding scanning and die reference hole establishment coordinate system can be popularized to die manufacturing of all stamping parts.
2. 2. An electronic device comprising a processor and a memory communicatively coupled to the processor for storing instructions executable by the processor, wherein the processor is configured to perform a process for improving a post-press die process character problem as set forth in claim 1.
3. 3. A server comprising at least one processor and a memory communicatively coupled to the processor, the memory storing instructions executable by the at least one processor to cause the at least one processor to perform a process for improving a post-press die process character problem as recited in claim 1.
4. 4. A computer-readable storage medium storing a computer program, wherein the computer program is executed by a processor to implement a method for improving a post-press working symbol type problem of a press die according to claim 1.

Description

Technological method for improving post-process character type problem of stamping die Technical Field The invention belongs to the technical field of process symbols of stamping dies, and particularly relates to a process method for improving the problem of post-process symbols of stamping dies. Background In recent years, the requirements of the domestic automobile industry on the precision of stamping parts are higher and higher, so that higher single product qualification rate is pursued, and the tolerance zone of the stamping parts is set narrower and narrower. The loading can be upgraded to +/-0.5, to +/-0.3 and even the tolerance consistency is required by the earliest meeting. The difficulty factor increases exponentially for the mold industry for every 0.1 reduction in the tolerance band. The mold enterprises can hardly keep pace with the times without improving the technical capability, the manufacturing precision and the detection precision, and can be gradually eliminated for a long time. The method has the advantages that the precision of the workpiece is affected too much, details are not needed, the post-process character type problem is discussed specially, and a general method is made to guide the manufacturing and development work of the die. The quality of the post-process die can directly influence the precision of the final product, which is a component part of the basic work of the die, and the three elements of the basic work of the die are symbol type, positioning and grinding. Because the stress release of the drawn part can generate rebound deformation after the drawing part is demolded, the drawing process type surface of the trimming die in the second procedure is firstly used in the stamping process. When the rebound deformed drawing piece is placed on the trimming die, the problem of shape matching occurs, and the following problems are caused by poor shape matching: 1. The trimming die is not well positioned, and the trimming punching die is generally positioned by the molded surface, so that the trimming die is not well positioned, and the final result of the poor positioning is that the dimensional accuracy of the workpiece is not stable. 2. Even if some auxiliary positioning measures, such as half crescent positioning, are added, the positioning reliability is ensured. However, because the shape is bad, when the trimming and pressing core works, the molded surface of the product can be deformed secondarily, which is also a direct cause of unstable dimensional accuracy of the product in the later stage. Disclosure of Invention In view of the above, the present invention aims to provide a process method for improving the post-process character problem of a stamping die, so as to effectively solve the post-process die product character problem and improve the stability of dimensional accuracy. In order to achieve the above purpose, the technical scheme of the invention is realized as follows: a process method for improving the post-process character type problem of a stamping die comprises the following steps: S1, cutting and punching a first part by adopting laser to obtain a cut drawing part; s2, punching the cut drawing piece, judging whether the punched drawing piece meets the qualification rate requirement and is locked by drawing, if so, entering a step S3, otherwise, entering an end; S3, stamping a C/H hole in the drawing piece, and placing the drawing piece on the OP20 die through matching the C/H hole with a C/H positioning hole on the OP20 die; s4, placing the drawing piece on an OP20 die to perform blue light scanning; S5, inputting the scanning point cloud into a process model, adjusting in the Z direction, comparing the scanning point cloud with the process model, and performing die face compensation on the process model according to the point cloud data; S6, carrying out secondary processing on the molded surface of the OP20 mold according to the number of OP20 processes. Further, in step S4, the OP20 mold is placed on a standard platform or a blue light table for scanning before the drawing member is placed on the OP20 mold for blue light scanning. Further, before the drawing member in step S4 is placed on the OP20 mold for blue light scanning, the method includes the following steps: S41a, searching point positions on the OP20 mould according to the best fitting result of blue light scanning; S42a, selecting support cushion blocks with different thicknesses according to the deformation of the drawing piece; s43a, placing the support cushion block at the OP20 die point in the step S41 a. Further, when the drawing member in step S4 is placed on the OP20 mold to perform blue light scanning, the method includes the following steps: S41b, firstly scanning 3 reference holes of the OP20 die; S42b, finding the center of the OP20 die according to the reference hole and establishing an XYZ coordinate system; S43b, performing blue light scanning. Further, the C/H position