Discretized mold profile accurate compensation method

Abstract

The invention belongs to the field of metal forging extrusion precision forming, in particular to a discretized mold profile accurate compensation method. The method is a profile compensation method based on point-to-point operation, analog simulation is carried out according to a novel profile of a mold after mold deformation and part springback compensation are completed by utilizing the method,and iterative compensation can be repeated if the forming precision does not meet the design requirement, so that accurate compensation for mold deformation and part springback is realized. The method is based on a profile reverse compensation principle; point cloud matching of the mold profile and the part profile is completed by utilizing a nearest point pair technical thought; therefore, all point clouds of the mold profile are compensated, the influence of mold deformation and part springback on the forming precision can be effectively reduced, meanwhile, the technology of directly generating the STL model through the point clouds is provided, point-line-surface fitting errors of a traditional profile are avoided, and the compensation precision of the complex mold profile is improved.The influence of mold deformation and part springback on the forming precision can be reasonably controlled, precise design of die products is facilitated, and the development efficiency is improved.

Description

technical field [0001] The invention belongs to the field of metal forging and extrusion precision forming, in particular to a numerical simulation-based compensation method for mold deformation and part springback. Background technique [0002] The information disclosed in the Background of the Invention is only intended to increase the understanding of the general background of the invention, and is not necessarily to be taken as an acknowledgment or any form of suggestion that the information constitutes the prior art that is already known to those skilled in the art. [0003] With the development of machinery industry, especially the continuous development of modern manufacturing industry, precision forging extrusion forming technology has been widely used. Using this technology, parts can meet their design requirements without subsequent processing or only a small amount of processing after forming. Therefore, The requirements for forming precision control are very high...

AI Technical Summary

Problems solved by technology

However, the inventors have found that most of the current research is only aimed at the springback of the part after it is released from the mold or only at the deformation of the mold during the forming process to compensate, or to complete the elastic deformation of the mold and the springback of the part for a certain section curve. Simultaneous compensation of springs, such as compensation of gear involutes, compensation of some sections of blades, etc., lack of reports on accurate compensation methods for space-complex profiles

This is due to the fact that it is difficult to use surface equations to describe complex profiles, and the research on multiple sections of the surface is not accurate enough, time-consuming, labor-intensive, and inefficient, and the shape of the mold after deformation and the shape of the part before springback cannot be obtained. Measurement, and the point-to-point relationship between the mold surface and the part surface cannot be determined, etc.

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