Warm fine blanking die based on current assistance and warm fine blanking method

Abstract

The invention relates to a warm fine blanking die based on current assistance and a warm fine blanking method, and solves the technical problems of poor forming quality, serious die abrasion and the like of an austenite 304 stainless steel cold fine blanking part in the prior art. The warm fine blanking die comprises an upper die plate, a lower die plate, a guide column, a guide sleeve, a male die fixing plate, a male die, a female die, an edge pressing plate, an edge pressing plate insert, a reverse ejection rod, a reverse ejection block, a pulse direct-current box, a first electrode and a second electrode, wherein the upper die plate is connected with the lower die plate through the guide column and the guide sleeve; the female die is fixedly connected with the lower die plate, the male die fixing plate is fixedly connected with the upper die plate, and the male die is fixedly connected with the male die fixing plate; and the edge pressing plate is connected with the upper die plate through a limiting bolt, the first electrode makes contact with an upper surface of the male die, the second electrode makes contact with a lower surface of the female die, and two output terminals of the pulse direct-current box are connected with the first electrode and the second electrode respectively. The invention is widely applied to the technical field of metal precision forming.

Description

technical field [0001] The invention relates to the technical field of metal precision forming, in particular to a current-assisted warm fine blanking die and a warm fine blanking method. Background technique [0002] With the increasing severity of automobile exhaust pollution, countries around the world have successively issued a series of exhaust emission standards. To meet these standards, automakers must use materials with higher heat and corrosion resistance for exhaust system parts. Due to its excellent heat resistance and corrosion resistance, austenitic 304 stainless steel is often used as the main application material for flanges in exhaust emission systems. At present, austenitic 304 stainless steel flange parts are mostly made by fine blanking forming process. Compared with traditional low-carbon steel, austenitic 304 stainless steel has higher strength, and it is prone to deformation-induced martensitic transformation under cold forming conditions, showing str...

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Problems solved by technology

[0004] In order to solve the existing technical problems such as poor forming quality and serious die wear of austenitic 304 stainless steel cold fine blanking parts, the present invention provides a current-assisted warm fine blanking die and warm fine blanking die that improves the section quality and reduces die wear. Chong method

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