Current loading method used during pulse current auxiliary precision blanking machining

Abstract

Currents act on metal, and an electric heating effect and electrically induced plasticity are achieved, wherein a high-frequency pulse current effect has the capacity of healing metal plastic strain damage. Electrically induced plasticity and electric heating softening effects are introduced into the precision blanking technology, and the precision blanking difficulty of high-strength steel platesis reduced. Metal materials are heated to expand through the electric heating effect, the defect that in the blanking medium-terminal stage, hydrostatic pressure stress of shear zones of the metal materials is reduced rapidly is relieved, and the capacity of restraining production-extension of holes of the shear zones is improved. By means of a good-time and proper pulse current acting manner anda loading method, current energy is intensively injected in good time at high density aiming at local zones, where the holes and micro-cracks are easily generated in the blanking process, of the shear zones, strain damage is repaired, the situation that the micro-cracks are further developed into macro-cracks, and a rough tear zone on a precision blanking section is finally formed is avoided, anda higher possibility is provided for enabling precision blanking to be more widely applied to high-strength type materials.

Description

technical field [0001] The invention designs a technology in the field of high-strength sheet material processing, specifically a pulse current loading method in the precision blanking process. Background technique [0002] Due to the rapid development of aerospace, aviation and automobile industries, higher requirements are put forward for the performance of reducing the weight of the carrier platform, improving fuel utilization, reducing pollution, and improving platform safety. High-strength steel plate has attracted the attention of many aerospace and automobile manufacturing industries due to its advantages such as high strength and plasticity, high specific strength and high impact absorption performance, and is widely used in many manufacturing fields such as aerospace, military weapons and vehicle machinery. [0003] Blanking is the most economical necessary process and necessary link in the machining industry. Among them, precision blanking parts have the advantages...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the technical problem that the existing fine blanking technology has insufficient punching ability for high-strength steel plates

Images