Distributed electromagnetic control edge blanking system and control method for stamping process
A distributed, blank-holder technology, applied in forming tools, manufacturing tools, metal processing equipment, etc., can solve problems such as increased energy consumption of equipment, and achieve the effect of reducing installed power, reducing energy consumption, and increasing blank-holder force.
Active Publication Date: 2021-01-15
HEFEI UNIV OF TECH
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Problems solved by technology
The current BHF control methods mainly include the optimization of the single-area BHF curve changing with time, and the BHF control method in which the BHF varies with the position of the circumferential block, but it does not consider the impact of the change of the BHF on the energy consumption of the equipment. The impact of the path change / increased loading area leads to an increase in equipment energy consumption
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[0038] In this embodiment, a distributed electromagnetic control blank-holding system of a stamping process is applied to a stamping die composed of an upper die 8 and a lower punch 9, such as figure 1 As shown, and includes: upper binder ring 1, upper binder ring guide device 2, upper binder ring connecting device 3, lower binder ring 4, supporting outer ring 5.
[0039] Divide the upper blank holder 1 into m areas along the circumferential direction, of which the i-th area is divided into k along the radial direction and from inside to outside i edge block, any jth edge block is denoted as U ij ,i∈{1,2,…,m},j∈{1,2,…,k i},Such as figure 2 Shown; Here the number of blank holders depends on the stamping shape of stamping sheet material and upper die 8;
[0040] All blankholders U on the innermost edge of upper blankholder 1 11 ,U 21 ,...,U i1 ,...,U m1 The shape surrounded is identical with the stamping shape in the upper die 8;
[0041] All blankholders on the outermo...
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The invention discloses a distributed electromagnetic control blank pressing system for a stamping technology and a control method of the distributed electromagnetic control blank pressing system. Thedistributed electromagnetic control blank pressing system is composed of an upper blank pressing ring, an upper blank pressing ring guiding device, an upper blank pressing ring connecting device, a lower blank pressing ring and a bearing outer ring. Small-scale electromagnetic coils are distributed on the upper blank pressing ring and the lower blank pressing ring, the upper blank pressing ring is circumferentially and radially partitioned, a large-scale electromagnetic coil is expanded outwards through the upper blank pressing ring connecting device, blank pressing force distributed and finecontrol is realized, meanwhile, the magnitude of blank pressing force is increased, and an application range of the distributed electromagnetic control blank pressing system for the stamping technology is extended. In the process of stamping, the magnitude of each partitioned blank pressing force is regulated and controlled in real time by changing the current magnitude of each electromagnetic coil, so that the stamping part shaping quality is improved, and meanwhile, the installed power of stamping equipment is reduced and energy consumption of the technology is reduced.
Description
technical field [0001] The invention relates to a blank-holding system and a control method of a stamping process, a distributed electromagnetic control blank-holding system and a control method of the stamping process. Background technique [0002] As an important processing method in manufacturing technology, stamping uses molds to separate or deform sheets, including basic processes such as blanking, deep drawing, bending, punching, flanging, and shaping. It has high production efficiency, less waste, and a smooth surface. The characteristics of low roughness and the ability to process parts with complex shapes. [0003] The control of blank holder force is beneficial to improve the forming quality of stamping parts. Properly adjusting the loading path and loading position of blank holder force can improve the stress and strain state of the sheet metal in the stamping process, thereby affecting its forming limit, cracking, wrinkling and springback state. The current con...
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IPC IPC(8): B21D26/14B21D37/12
CPCB21D26/14B21D37/12
Inventor 李磊黄海鸿吕清宇李新宇刘志峰
Owner HEFEI UNIV OF TECH