Based on the conditions of processing facilities in enterprise, the compound dies of cutting edge and punching round holes for the tractor frame is developed.

根据企业加工设备条件，研制了拖拉机车架切边冲孔复合模具。

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On the basis of technology analysis for the U shape pierced side holes, this paper introduced the struture of compound dies for U shape stamped and pressed-word.

通过对U形件侧面冲孔工艺的分析，介绍了U形件冲孔、压字复合模结构。

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Based on the conditions of processing facilities in enterprises, the thesis develops the compound dies of cutting edge and punching round holes of the tractor frame.

针对企业加工设备条件的限制研制了拖拉机机架切边冲孔复合模具。

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