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Title:Size accuracy control of large-scale parts on fine blanking
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ClassificationCode:TG386.2
year,vol(issue):pagenumber:2020,45(4):57-61
Abstract:

 Aiming at the problem of irregular deformation for fine blanking parts caused by the anisotropy of steel plate and the asymmetry of part shape,taking an automobile gearbox connection plate as an example,according to its structural characteristics, size accuracy and required fine blanking force,the fine blanking process of first blanking and then punching hole was drawn up. The changing lows of distance between two teeth, the top circle, the root circle in the tooth-shaped inner hole of involute profile and the position degree of four urcular holes were studied by the tests under different rolling directions of materials. According to the difference between the size of parts and the design size of die obtained from the test, the size compensation method was used to optimize the size of fine blanking die, and the fine blanking parts that met the requirements of the drawings were obtained. In order to facilitate the maintenance of die, a special upper and lower split design was adopted for the punch of tooth-shaped hole in the fine blanking die. The practical application shows that the inner hole size of involute profile and the position degree of four circular holes are stable, and the size accuracy meets the requirements of the drawings.

Funds:
国家科技重大专项(2019ZX04002030)
AuthorIntro:
赵彦启(1962-),男,硕士,研究员,硕士生导师 E-mail:yanqi.zhao@cmfb.com.cn 通讯作者:肖振沿(1986-),男,学士,工程师 E-mail:zhenyan.xiao@cmfb.com.cn
Reference:

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