Transactions of Materials and Heat Treatment

Title：Research on influence of mandrels on the cold push-bending of thick-walled TA2 pipe

Authors： Hao Jing Zhang Xu Ji Weixi Zhang Qingzheng

Unit： Nantong Vocational University Jiangnan University Shandong Huaning Detection Equipment Co. Ltd.

KeyWords： TA2 pipe cold push-bending mandrels numerical simulation

ClassificationCode：TG386

year,vol(issue):pagenumber：2015,40(11):40-47

Abstract：

In order to find out the influence regularity of mandrel on the cold push-bending process of large-diameter thin-walled titanium TA2 tube, a TA2 tube with the dimension of Ф219 mm×3.2 mm by experiment was studied. A titanium TA2 tube cold push-bending finite model was set up based on software DYNAFORM and the reliability of the model was verified through cold push-bending experiment. The influence regularities of mandrel structure, diameter and form on the large-diameter thin-walled TA2 were studied based on the established finite element model. Results show that stepped mandrels can prevent the TA2 elbow from wrinkling, with the decrease of mandrel diameter, the external arc side wall thinning-rate increases at first and then decreases while both the inner arc side wall thickening ratio and the ovality of section have the tendency of increase with reasonable interval value gap between 0.5 to 1.5, so the mandrel and hydraulic can effectively prevent the TA2 from cross-section distortion.

Funds：

南通市科技项目“废铅酸电池极板中铅清洁回收预处理设备的研发”（BK2014018）；江苏省“六大人才高峰”资助项目(2010-JXQC-089)

郝静（1969-），女，本科，副教授，高级工程师吉卫喜（1961-），男，博士，教授

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