Transactions of Materials and Heat Treatment

Title：Analysis on strength and stiffness of high pressure hydro-forming press with short stroke and fully pre-stressed assembled frame

Authors： Zhang Weiwei1 2 Wang Xiaosong1 2 Gao Guilin3 Zhang Hongfeng3 Yuan Shijian1 2

Unit： 1.School of Materials Science and Technology Harbin Institute of Technology 2.National Key Laboratory for Metal Precision Hot forming Harbin Institute of Technology 3.FAW Car Co. Ltd.

KeyWords： high pressure hydro-forming press fully pre-stressed assembled frame hydraulic press

ClassificationCode：

year,vol(issue):pagenumber：2015,40(10):82-87

Abstract：

The main advantages of short stroke and high pressure hydro-forming press are higher die-closed speed, shorter main cylinder stroke, shorter establishment time of clamping force and higher production efficiency. In order to decrease the pulsation stress amplitude, enhance the fatigue life and ensure high pressure forming precision of hydro-formed parts, a fully pre-stressed assembled frame structure was used in the structural design of short stroke hydro-forming press. By traditional materials mechanics method, the strength and stiffness of the press crown were checked, and the maximum main stress and the maximum deflection were within the allowable range. Furtherly, the stress distribution and deflection of press body, relative transverse displacement of the column and the shape of joint surface between press crown and column were analyzed by the numerical simulation. The result shows that the equivalent stress of press body is less than 100 MPa, the maximum deflection of press crown is 0.184 mm·m-1, the transverse displacement of column is 0.49 mm, and the maximum vertical displacement between press crown and column is 0.02 mm. Both the strength and the stiffness are within the acceptable range.

Funds：

国家科技重大专项“高档数控机床与基础制造装备”(2011ZX04001-011)

张伟玮（1985-），男，博士研究生

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