A method and device for improving the distortion and wrinkling of polymer sheet metal incremental forming
A progressive forming and polymer technology, which is applied in the field of polymer progressive forming, can solve the problems of rolling tool head loss of effectiveness, limited effect, and inability to adjust rolling speed, so as to improve distortion and wrinkling defects, reduce heat, and benefit The effect of promotion and application
Active Publication Date: 2021-05-25
NANJING INST OF TECH
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Problems solved by technology
Since the material properties such as stiffness, hardness and density of the polymer sheet are relatively low, and the polymer material is sensitive to temperature, the sliding friction between the tool head and the sheet will generate a large amount of heat, which will easily lead to the softening of the sheet and make it easier to Twisting and wrinkling defects
[0004] The rolling tool head (CN201010030832) researched by Jilin University can reduce the friction between the tool head and the plate to a certain extent, and partially improve the distortion and wrinkling, but the rolling body at the end of the tool head must be a complete spherical ball. Rolling the tool head is useless when the top shape of the tool head is required to be other than a sphere
In addition, the rolling tool head relies on the friction between the processing plate and the passive rolling, which cannot realize real-time quantitative control and adjustment of the rolling speed, so the effect is relatively limited
Method used
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[0023] The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solutions of the present invention more clearly, but not to limit the protection scope of the present invention.
[0024] like figure 1 As shown, the present invention provides a device for improving the distortion and wrinkling of polymer sheet metal progressive forming, including a low-speed motor 1, and the low-speed motor 1 is preferably a servo drive. The lower end of the low-speed motor 1 and the connecting part 2 is threaded, the upper end of the connecting part 2 is threaded with the main shaft of the machine tool, and the low-speed motor 1 is connected with the tool head 4 through a shaft coupling 3 .
[0025] The invention discloses a method for improving the progressive forming distortion and wrinkling of polymer sheets, comprising the following steps:
[0026] Step 1: Equip the progressive form...
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The invention discloses a method for improving the distortion and wrinkling of polymer sheets in progressive forming, which includes the following steps: S01: equip a progressive forming machine tool with a low-speed motor, and connect the low-speed motor to a tool head through a coupling; S02: through The linear interpolation method outputs the NC machining code; S03: Determine the feed rate ν for progressive forming of polymer sheet metal; S04: Calculate the equivalent radius r; S05: Give the angular velocity ω of the tool head rotation, so that ω=ν / r. The invention also discloses a device for improving the distortion and wrinkling of the progressive forming of the polymer sheet. The invention discloses a method and device for improving the distortion and wrinkling of polymer sheet material in progressive forming. By reducing the average relative speed between the tool head and the sheet material, the twist and wrinkle of the polymer sheet material are improved.
Description
technical field [0001] The invention relates to a method and a device for improving the distortion and wrinkling of polymer sheet material progressive forming, and belongs to the field of polymer progressive forming processing. Background technique [0002] Due to the differences between polymers and metal materials, the defects of incremental forming are also different. The defects of incremental forming of sheet metal are mainly cracks, while the defects of incremental forming of polymer sheet are cracking, twisting and wrinkling. Among them, the distortion is caused by a single processing direction during incremental forming, which is manifested as a circumferential offset of the material on the formed part. The mechanical properties of polymer materials are much lower than those of metal materials, so it is very easy to produce circumferential deviation with the rotation of the tool head. When the circumferential deviation accumulates to the limit that the polymer mater...
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IPC IPC(8): B29C53/18
CPCB29C53/18
Inventor 查光成严阿鑫郑硕陆传凯浦一子
Owner NANJING INST OF TECH