Variable-procedure stamping die for positive and negative stretching of parts

Abstract

A variable-procedure stamping die for the positive and negative stretching of parts belongs to the technical field of forming and dies in mechanical engineering, and consists of a hydraulic system and a die part. The hydraulic system comprises an adjustable one-way throttle valve, a three-position four-way directional valve and a piston rod; and the die part comprises an inner / outer stretching punch-die fixed on a lower die holder, as well as an outer stretching female die and an inner stretching male die which are fixed on an upper die holder, wherein the movement of the outer stretching female die is controlled by the piston rod; the moving direction and speed of the piston rod are controlled by the three-position four-way directional valve and the adjustable one-way throttle valve; sheets can be stretched into different depths to achieve different procedures of stamping through adjustment of initial relative positions of both the outer stretching female die and the inner stretchingmale die in the height direction and the replacement of a limited block; and the precedence of inner stretching and outer stretching of the sheets can be changed through controlling the up-and-down movement direction of the outer stretching female die. The variable-procedure stamping die provided by the invention overcomes the shortcomings in the prior art that a plurality of stamping dies are required to complete the stamping, has a lower cost and improves the economic benefit.

Description

Technical field [0001] The invention relates to a mechanical hydraulic linkage variable process composite stamping die used for positive and negative drawing parts, belonging to the technical field of forming and die in mechanical engineering. Background technique [0002] Sheet metal drawing is an important sheet metal stamping processing method. Its drawing quality mainly depends on the correctness and rationality of the drawing process and die. Among various sheet metal stamping processing methods, the position of drawing is The most important thing is, the difficulty of forming is the greatest, but so far there has not been an integration of the stretching process and the mold structure; at present, when determining various stretching process plans, designers still generally use experience and constantly modify the mold through repeated adjustments. The obvious shortcomings of the process plan and mold structure are poor forming quality, large number of molds, long processing...

AI Technical Summary

Problems solved by technology

[0002] Sheet metal stretching is an important sheet metal stamping processing method, and its stretching quality mainly depends on the correctness and rationality of the stretching process and molds. In various sheet metal stamping processing methods, the position of stretching Most importantly, forming is also the most difficult, but so far there has been no integration of the drawing process and the mold structure; currently, when designers determine various drawing process schemes, they still generally use experience to continuously modify the mold through repeated debugging The obvious disadvantages of the process plan and mold structure are poor forming quality, large number of molds, long processing and debugging cycle, high production cost, and cannot adapt to the increasingly fierce market competition environment.

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