Device and method for divisional loading of blank holder force

Abstract

The invention discloses a device and method for divisional loading of the blank holder force. The device comprises a female die, a plane blank holder, a round-angle zone blank holder, a blank holder fixing plate, a telescopic structure and a male die. According to the device and the method, an annular nested blank holder structure capable of realizing divisional application of the blank holder force to a plane zone and a round-angle zone is designed, in the deep-drawing process, before the plane zone is separated from the plane blank holder, the blank holder force is applied to round-angle zone materials through the round-angle zone blank holder, the round-angle zone materials which are used as process remaining materials originally and are about to be cut off are deformed continuously, most materials of the round-angle zone become effective areas of a deep-drawn part, thus the material utilization rate is increased, the formability and the wall-thickness uniformity of the part are improved, the forming passes are reduced even, and the die cost and the equipment cost are reduced.

Description

technical field [0001] The invention relates to the technical field of plate deep drawing, in particular to a method and a device for loading blank-holding forces in different regions. Background technique [0002] In sheet metal forming, deep drawing is a commonly used process. Through deep drawing, cylindrical, box-shaped and other complex panel parts can be obtained, which are widely used in aerospace, automobile and other fields. The main deformation area of ​​deep drawing deformation is the flange area, which is subjected to radial tensile stress and tangential compressive stress, so the flange area is easy to wrinkle, and it is necessary to apply a blank-holding force to the flange area through the blank holder to avoid cracking. wrinkle. If the flange area leaves the blank holder and continues to draw, the material near the fillet area of ​​the die is easy to wrinkle, so usually the drawing is stopped before the flange area leaves the blank holder, and the material ...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a device and method for loading blank-holding force in different regions, so as to solve the problem in the above-mentioned prior art that the remaining material of the fillet process of the deep-drawing die is completely unusable, resulting in waste of materials, and even due to the Causes, insufficient original plate width, etc.

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