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Block edge pressing device based on electric control permanent magnet technology and edge pressing force control method

An electronically controlled permanent magnet and blank-holding device technology, which is applied in the field of blank-holding devices, can solve the problems affecting the quality of slab deep-drawing and the inability to realize precise control of blank-holding force, so as to provide forming effect and forming limit, and greatly promote Prospects and social needs, the effect of energy saving and calorific value

Inactive Publication Date: 2020-06-12
YANSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to technical limitations, precise control of the blank holder force cannot be achieved, which affects the quality of slab deep drawing

Method used

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  • Block edge pressing device based on electric control permanent magnet technology and edge pressing force control method
  • Block edge pressing device based on electric control permanent magnet technology and edge pressing force control method
  • Block edge pressing device based on electric control permanent magnet technology and edge pressing force control method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] press the whole system figure 2 As shown in the connection, when the drawing is in progress, if the wrinkling tendency at a certain position increases, the pressure value measured by the pressure sensor will increase. After the measured value is passed to the controller, the controller will give an output value according to the PID control law , this output value control circuit regulator will input a higher current intensity value to this area, so that the coil wound on the permanent magnet will generate an instantaneous electromagnetic field to increase the external magnetic force of the permanent magnet. Under the action, the blank holder force here increases enough to suppress the occurrence of wrinkling.

Embodiment 2

[0060] When deep drawing is in progress, if the wrinkling tendency at a certain position decreases, the pressure value measured by the pressure sensor will decrease. After the measured value is passed to the controller, the controller will give an output value according to the PID control law. The output value control circuit regulator will input a certain low current intensity value to this area, so that the coil wound on the permanent magnet will generate an instantaneous electromagnetic field to reduce the external magnetic force of the permanent magnet. Next, the blank holder force is reduced here in order to increase the height of deep drawing.

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Abstract

The invention discloses a block edge pressing device based on an electric control permanent magnet technology. The block edge pressing device comprises an upper die base, a male die, a hanging bolt assembly, a cushion block, an edge pressing ring, a female die, a countersunk bolt, a suction cup, a current regulator, a wire, a lower die base, a pressure transmitter, a controller and a data line. According to the block edge pressing device based on the electric control permanent magnet technology and an edge pressing force control method, only when the edge pressing force is adjusted, current needs to be introduced, when the edge pressing force is not changed, no current needs to be provided, and due to the fact that the advantages of being safe, saving energy and being small in heating amount are achieved, different edge pressing forces can be provided for different positions of a plate blank, and the problem that the plate blank wrinkles due to the too small edge pressing force or thedrawing height is reduced due to the too large edge pressing force is solved.

Description

technical field [0001] The invention relates to the field of blank-holding devices, in particular to a block-by-block blank-holding device and a method for controlling blank-holding force based on electronically controlled permanent magnet technology. Background technique [0002] Deep drawing is the main forming method of thin plate forming. During the forming process of thin plate parts, the blank flange area will be subject to large tangential compressive stress, which is prone to plastic instability. Therefore, the forming quality of the flange area is very important for the smoothness of the thin plate part. Shaping plays an important role. In order to eliminate the wrinkling of thin plate parts, the common method is to apply blank-holding force in the flange area, but if the blank-holding force is too large, it will lead to excessive thinning of thin plate parts. Therefore, the reasonable control of the blank holder force is the key factor for the smooth forming of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D22/22B21D24/04
CPCB21D22/22B21D24/04
Inventor 张红升秦泗吉曹丽琴王洪超李闯张倩荣陈端
Owner YANSHAN UNIV
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