Distributed blank-holding force generating device and control method for electro-permanent-magnet composite box-type stamping process

Abstract

The invention discloses a distributed blank-holding force generating device and a control method for a box-type stamping process combined with electric permanent magnets. The device is composed of a blank-holding ring guiding device, an electromagnetic force generating device, a blank-holding ring, and an electronically controlled permanent magnet sucker ;According to the deformation characteristics of the box-shaped parts, distributed blank-holding devices with different maximum blank-holding forces are arranged on the long side, short side and rounded corner area, which matches the blank-holding force and blank-holding force demand generated in each area, and reduces the The energy consumption of the forming process; the introduction of electronically controlled permanent magnet chucks, the deployment of the electromagnetic force of the distributed edge-holding device, while improving the electromagnetic force generation capacity of each edge-holding block, reduce the energy consumption of the distributed edge-holding block; The edge ring is equipped with a displacement sensor. By monitoring the change of the thickness of the sheet material at each distributed blank-holding position, the blank-holding force of the distributed blank-holding block is adjusted in real time, so as to realize the accurate and controllable loading path of the distributed blank-holding force during the stamping process, thereby improving the stamping process. Forming quality of the part.

Description

technical field [0001] The invention relates to a blank-holding system and a control method of a stamping process, a distributed blank-holding force generating device and a control method of an electro-permanent-magnet composite box-shaped stamping process. Background technique [0002] Stamping processing is one of the main methods of metal plastic processing, which belongs to material forming engineering technology, including basic processes such as blanking, deep drawing, bending, punching, flanging, and shaping. It has high production efficiency, less waste, and surface The advantages of low roughness and the ability to process parts with complex shapes. [0003] The blank holder force is one of the important parameters in stamping forming. Proper control of the blank holder force is conducive to improving the forming quality of the stamping parts, improving the stress and strain state of the sheet during the stamping process, and then affecting its forming limit, cracki...

AI Technical Summary

Problems solved by technology

The current BHF control methods mainly include the optimization of the BHF curve in a single area over time, and the BHF control method in which the BHF varies with the position of the circumferential block, but it does not take into account the change of the BHF during the stamping process. , and did not take into account the impact of changes in blank holder force on equipment energy consumption, resulting in an increase in equipment energy consumption

[0004] The current single electromagnetic distributed blank-holding method provides a limited blank-holding force, and cannot even meet the blank-holding force requirements of some special material boxes when stamping.

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