Machining method and design system for surface microtexture of stamping die

Abstract

The invention discloses a processing method and a design system for a surface microstructure of a stamping die. The processing method comprises the following steps: acquiring three-dimensional point cloud data of the stamping die; according to the three-dimensional point cloud data, obtaining three-dimensional morphology characteristic parameters of the surface of the stamping die through calculation; carrying out boundary feature division according to the three-dimensional morphology feature parameters, and determining the stamping die surface boundary feature division parameters; according to the boundary feature division parameters and the three-dimensional shape feature parameters, acquiring friction wear area division parameters; acquiring die stamping simulation data, carrying out orthogonal polynomial regression design on the stamping die performance parameters and the micro-texture design parameters, and determining the corresponding relation between the performance parameters and the micro-texture parameters; according to the friction wear area division parameters, combining the corresponding relation between the performance parameters and the microstructure parameters to obtain stamping die surface microstructure machining design parameters; and machining the microstructure on the surface of the stamping die according to the microstructure machining design parameters. The surface friction characteristic and material flowing of the stamping die machined through the method are actively optimized.

Description

technical field [0001] The invention relates to the field of stamping die design and manufacture, in particular to a processing method and design system for the surface micro-texture of the stamping die. Background technique [0002] Stamping is an important process in automobile manufacturing. Stamping dies determine the quality of stamped parts, and the surface characteristics of stamping dies have an important impact on the life of the die and the quality of formed parts. During the working process, the contact area of ​​the stamping die is large, and the deformation of the sheet is accompanied by a huge deformation force during the flanging process, which makes severe friction between the concave-convex die and the sheet easy to occur. Long-term friction will easily lead to wear of the die and reduce the life of the die. If the structure of some molds is unreasonable, the flow of the sheet metal in the area will be abnormal, resulting in problems such as thinning, wrinkl...

AI Technical Summary

Problems solved by technology

During the working process, the contact area of ​​the stamping die is large, and the deformation of the sheet is accompanied by a huge deformation force during the flanging process, which makes it easy to have severe friction between the concave-convex die and the sheet. Long-term friction will easily lead to wear of the die and reduce the life of the die.

Unreasonable setting of some mold structures will make the flow of the sheet metal in the area abnormal, causing problems such as thinning, wrinkling, springback, and poor uniformity of the sheet metal

[0003] The current mold surface treatment technologies mainly include carburizing, nitriding, chrome plating, laser cladding, TD, PVD, CVD, etc. These traditional mold surface strengthening technologies are mainly used to improve the surface hardness of the mold, thereby improving the service life of the mold, and cannot Optimize the friction and wear characteristics of the mold surface, improve the material flow during the stamping process, and improve the quality of the formed parts

[0004] The traditional mold surface treatment technology has various disadvantages: the waste gas combustion of the carburizing technology affects the environment, and the treated mold is prone to surface intergranular oxidation and other problems; the nitriding technology is prone to produce a loose and porous surface compound layer, which is more brittle; The waste liquid of chrome plating technology will pollute the environment and is not suitable for high-strength plates; laser cladding technology will generate residual stress in the cladding layer during the cooling process, and there is a lack of special materials suitable for all molds; TD cladding treatment has deformation, Secondary heating in the later stage will easily lead to deformation or cracking of the formed part; the coating of PVD physical vapor deposition technology generally has poor heat resistance and high cost; the high reaction temperature of CVD chemical vapor deposition is easy to cause mold deformation, and the deposition layer interface is prone to diffusion

[0006] At present, in the field of research, due to the lack of simulated stamping equipment, it is difficult to carry out stamping simulation tests, so the research results of micro-texture technology in the field of mold surface treatment are still relatively small. Practical stamping production of textured dies

At the same time, the automation and intelligence level of processing design in the field of mold surface treatment is low, the design process and design methods are relatively traditional, the design efficiency is not high, and there is a lack of intelligent design system that can improve the efficiency of mold surface treatment

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