A stamping device for controlling the curling and rebounding of the side wall of a stamping part

Abstract

The invention discloses a stamping part side wall curled rebounding control stamping device which comprises an upper die base, a concave die, a blank holder, a convex die and a lower die base from top to bottom, wherein the blank holder is in driving connection with a holder-on rod; the convex die is matched with the concave die; the upper die base is fixedly connected with the concave die and moves synchronously with the concave die; the convex die is fixedly connected with the lower die base; the convex die comprises a first stamping part and a second stamping part from top to bottom; the first stamping part and the second stamping part are in smooth transition by virtue of a transition curve part; a clearance between the outer contour of the side wall of the first stamping part and the side wall of the concave die is 1.2-1.6 times of the thickness of a to-be-stamped plate; a clearance between the outer contour of the side wall of the second stamping part and the side wall of the concave die 2 is 0.8-0.9 times of the thickness of the to-be-stamped plate; the projection length of the transition curve part in the stamping direction is 2-3 times of the thickness of the to-be-stamped plate. According to the stamping part side wall curled rebounding control stamping device, the die clearance is changed during a stamping process, so that the stress difference between inner and outer layers of a material is decreased, side wall curled rebounding of parts is effectively controlled, and the formation precision and quality of the parts are improved.

Description

technical field [0001] The invention relates to a stamping device for controlling the curling and springback of the side wall of a stamping part. By optimizing the structure of the punch, the mold gap of the key part of the part is changed with the stamping process, so as to achieve the purpose of controlling the curling springback of the side wall, and belongs to the technical field of stamping forming. Background technique [0002] Side wall curl is a defect that is prone to occur during the bending and drawing process of parts with flanges. It is a springback phenomenon and widely exists in the forming process of automotive beam parts, stainless steel deep drawing parts and other parts. The performance is that after the forming is completed, the side wall that should have been straight is arc-shaped due to springback, which causes difficulties in subsequent welding and assembly processes, and even leads to scrapping of parts. In addition, household appliances, kitchen ute...

AI Technical Summary

Problems solved by technology

The performance is that after the forming is completed, the side wall that should have been straight is arc-shaped due to springback, which causes difficulties in subsequent welding, assembly and other processes, and even leads to the scrapping of parts

In addition, household appliances, kitchen utensils and other household products use a large number of stainless steel parts. Due to their large yield ratio, stainless steel parts have serious springback during processing and significant work hardening.

Common problems such as stainless steel washbasins, gas cooktops, and mechanical equipment shells are prone to curling of the side walls during the deep drawing process

[0003] The side wall curling phenomenon occurs in the side wall part, affected by the structure of the mold, the traditional springback compensation method is difficult to apply to the control of the side wall curling phenomenon

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