Transactions of Materials and Heat Treatment

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ClassificationCode：TG156

year,vol(issue):pagenumber：2018,43(7):134-139

Abstract：

The cylindrical part with conical bottom composes of a conical bottom and a higher straight wall cylinder, and the hydraulic pressure loading path in the hydraulic deep drawing process is different from those of both cylindrical part and conical part. Therefore, the hydraulic deep drawing process of the cylindrical part with conical bottom was simulated by finite element software DYNAFORM, and the influences of different hydraulic pressure loading paths on their wall thickness distribution, fracture and wrinkling were analyzed. Then, the control strategy of hydraulic pressure loading path for the cylindrical part with conical bottom was also studied. The results show that the hydraulic pressure loading path of two inflection points is suitable for the hydraulic deep drawing of the cylindrical part with conical bottom. Namely, the first inflection point is fillet center at the punch bottom, which is on the same horizontal line as the fillet center at the die, and the second inflection point is fillet center at the top of conical bottom of punch, which is on the same horizontal line as the fillet center at the die. Furthermore, there are two wave trough points in the wall thickness distribution of formed cylindrical part with conical bottom by hydraulic deep drawing, the first point lies at the junction between bottom fillet and conical wall of the cylinder part with conical bottom (Point A), the second point lies at the junction between fillet at the top of conical bottom and straight wall (Point B). Thus, the reasonable hydraulic pressure loading path should be adopted according to different drawing ratios and cone angles.

Funds：

国家自然科学基金资助项目（51275003）

王秀丽（1991-），女，硕士研究生，E-mail：469990054@qq.com；通讯作者：王会廷（1971-），男，博士，副教授，E-mail：wgwht@nuaa.edu.cn

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