Device for eliminating warping rebound of side wall of stamped component and edge pressing technology

Abstract

The invention discloses a device for eliminating warping rebound of a side wall of a stamped component. The device comprises a concave mould and a convex mould matched with the concave mould, and is characterized in that a pressing plate connected with a pressing plate nitrogen cylinder is arranged inside the concave mould; a positioning heave is arranged on a contact surface of the concave mould and a metal sheet; an edge pressing ring connected with an edge pressing ring nitrogen cylinder is arranged on the outer side of the convex mould; a positioning groove matched with the positioning heave is arranged on a contact surface of the edge pressing ring and the metal sheet; the distance from an initial position of the edge pressing ring before working to a base is Lmm. The invention further provides an edge pressing technology using the device. In the edge pressing technology, based on distribution characteristics of an internal stress in the metal sheet stamping process and a warping rebound forming principle, the warping rebound of the side wall of the stamped component is effectively eliminated by controlling the stroke of the edge pressing ring and the flow of a material on the metal sheet; in particular for stamped components of a high-strength steel plate and an aluminum plate, the edge pressing technology has the advantage that the rebound can be effectively eliminated without relatively high deformation.

Description

technical field [0001] The invention relates to the technical field of thin plate cold stamping forming, and is one of the necessary processes for the application of high-strength steel plates and aluminum alloy plates in the field of automobile stamping, in particular to a device for eliminating warping and springback of the side wall of a stamping part and its edge-holding process. Background technique [0002] At present, thin sheet metal cold stamping forming technology is a widely used plastic forming technology, which has the advantages of high quality, high efficiency, large batch, material saving, energy saving and low cost. With the increasing weight reduction and crash safety of automobiles, the application of high-strength steel plates and aluminum alloy plates is also becoming more and more extensive. The amount is large and the shape is complex, which is difficult to overcome. The conventional stamping process reduces the warpage and springback of the side wall...

AI Technical Summary

Problems solved by technology

With the increasing weight reduction and crash safety of automobiles, the application of high-strength steel plates and aluminum alloy plates is also becoming more and more extensive. The quantity is large and the shape is complex, it is difficult to overcome

The conventional stamping process reduces the warpage and springback of the side wall by repeatedly resting the mold, but the effect is not ideal, and the process is unstable. For example, slight changes in blank holder force, blank holder stroke, stamping speed, etc.) will result in different springback results, which will seriously affect the dimensional accuracy of stamped parts and bring difficulties to the subsequent welding process

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