The limiting structure of the pressing core

Abstract

The invention aims to provide a limiting structure of a material pressing core capable of preventing a buffer block from being damaged due to impact loads. The limiting structure comprises a side pin on an upper side base. The material pressing core is connected with the upper side base. A limiting groove is formed in the zone, corresponding to the side pin, of the material pressing core. The suspension end of the side pin is located in the limiting groove and can move up and down in the limiting groove. The buffer block used for providing buffer and support for the side pin is arranged on the upper portion of the limiting groove. A limiting face used for limiting upward movement of the side pin is arranged near the lower end of the buffer block. According to the scheme, when the side pin moves upwards and makes contact with the buffer block, the buffer block is flexibly deformed by a certain distance, then the side pin makes contact with the rigid limiting face, and upward movement of the side pin is hindered through the limiting face, and the buffer block is not deformed anymore, so that the buffer block is protected against damage.

Description

technical field [0001] The invention relates to the technical field of automobile stamping dies, in particular to the improvement of the microstructure of a pressing core. Background technique [0002] Stamping dies for automobile body panels are the most demanding and difficult to process in the manufacture of automobile bodies, and are also the rapidly developing cold stamping process equipment in the manufacture of electromechanical stamping parts in my country. In the automobile panel stamping die, when using the traditional side pin mechanism, such as figure 1 As shown, the side pin 1 is fixed on the upper mold base, and the buffer block 2 is fixed on the binder core 3 by anti-rotation screws. During the process from closing to opening of the mold, side pin 1 and binder core 3 maintain a state of relative motion. When side pin 1 moves to a distance H (H is defined as the theoretical calibration stroke of binder core 3, unit: mm), The side pin 1 comes into contact with...

AI Technical Summary

Problems solved by technology

During the process from closing to opening of the mold, the side pin 1 and the pressing core 3 maintain a state of relative motion. When the side pin 1 moves to a distance H (H is defined as the theoretical calibration stroke of the pressing core 3, unit: mm), The side pin 1 comes into contact with the buffer block 2. Because the buffer block 2 is a flexible body, it is compressible. At the same time, due to the impact force of the pressure core 3 and the return elastic element of the pressure core 3, the buffer block 2 breaks down. Flexible deformation, when the impact force is large, the buffer block 2 will fail and be damaged, resulting in the need to replace the buffer block 2 in stamping production and stop the line, increasing production costs and reducing production efficiency

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