Method and device for eliminating stress of metal die underwater

Abstract

The invention discloses a method and a device for eliminating stress of a metal die underwater. According to the method, underwater laser-plasma shock waves are taken as processing means, the device is adopted to impact the die surface point by point, so that processing stress caused by cold extrusion molding during angle chamfering of the die as well as thermal stress and structural stress caused during die welding can be eliminated uniformly, and the rigidity of the die is enhanced. Compared with the conventional metal die stress eliminating method, the method has the advantages of high efficiency, low energy consumption, low cost and the like, and solves the problems of low efficiency, poor processing quality, high maintenance cost, high energy consumption and the like of the conventional metal die stress eliminating equipment. The method and the device for eliminating the stress of the metal die underwater are mainly applied to stress elimination of metal dies in die making and rapid shaping industries.

Description

technical field [0001] The invention relates to a method and device for eliminating metal mold stress based on underwater laser-plasma shock wave technology, which can be used to eliminate bad residual stress of various metal molds, and belongs to the technical field of mold processing. Background technique [0002] The edges and corners formed by the large surface and the small surface of the metal mold require clear angles (that is, the section of the geometric figure formed by the large surface, the small surface and the edge must be at right angles). This work is generally formed by cold extrusion, which is easy to make the metal inside Lattice and grain boundaries slip and twist, creating processing stresses. Although the welding temperature partially eliminates this stress when assembling and welding the stiffening plate on the opposite side, but the elimination is not uniform, and the welding itself brings new stress——welding stress (thermal stress and tissue stress),...

AI Technical Summary

Problems solved by technology

Apply black light-absorbing paint directly on the workpiece, making it difficult to clean the residual paint on the workpiece surface during post-processing

In addition, the thickness and uniformity of the light-absorbing coating are not easy to control, resulting in surface quality problems such as over-melting, ablation, and unstable ripples on the surface of the workpiece after treatment.

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