Workpiece machining deformation control method

Abstract

The invention discloses a workpiece machining deformation control method. Reinforcing ribs meeting certain conditions can be reserved through topological optimization in the primary machining stage, the bending rigidity of a workpiece is enhanced, and the machining deformation in the primary machining stage can be reduced to a great extent; the intermediate workpiece reserved with the reinforcingribs in the primary machining stage is placed for 96 hours or longer, after stress redistribution is sufficient and the size is relatively stable, the stable intermediate workpiece is obtained, then thermal vibration composite aging is conducted to reduce residual stress, workpiece deformation is further reduced, and finally the reinforcing ribs reserved in the intermediate workpiece are removed through secondary cutting machining; at the moment, due to the fact that stress is fully released and reduced, the number of the cut reinforcing ribs is smaller than that of removed materials of first-time machining, large stress redistribution caused by first-time machining cannot be generated, and after the reinforcing ribs are cut off, large deformation of a finally-obtained machined workpiece cannot be generated any more, so that the bending rigidity of the workpiece can be effectively improved, and internal residual stress can be reduced.

Description

technical field [0001] The invention belongs to the technical field of residual stress processing deformation control, and in particular relates to a method for controlling workpiece processing deformation. Background technique [0002] Processing deformation is mainly caused by four factors: blank initial residual stress, clamping force, cutting force and cutting heat, and residual stress introduced by processing. Among them, the initial residual stress of blank has the greatest influence on processing deformation. Before the parts are processed, thermal aging and vibration aging are mainly used to homogenize the residual stress field and reduce the peak value of the residual stress field, so as to control the processing deformation; however, thermal aging consumes a lot of energy, and like vibration aging, there are processes that are not easy to control , The effect of stress relief is not ideal and the deformation of the final workpiece is still relatively large. Conte...

AI Technical Summary

Problems solved by technology

Before the parts are processed, thermal aging and vibration aging are mainly used to homogenize the residual stress field and reduce the peak value of the residual stress field, so as to control the processing deformation; however, thermal aging consumes a lot of energy, and like vibration aging, there are processes that are not easy to control , the effect of stress relief is not ideal and the final deformation of the workpiece is still relatively large.

Images