Transactions of Materials and Heat Treatment

Title：Trajectory modeling of extrusion stretch bending simulation

Authors： Liu Tianjiao Wang Yongjun Xia Xiaojiao Wang Jian Han Gang Li Shanliang

Unit： Northwestern Polytechnical University Xian 710072 China 2. AVIC Xian Aircraft Industry (group) Company Ltd.

KeyWords： extrusion stretch bending stretch bending machine jaw trajectory connector elements

ClassificationCode：

year,vol(issue):pagenumber：2014,39(7):132-137

Abstract：

The method of jaw trajectory modeling simulated on account of connectors was put forward. The geometric model of multi-body mechanism model and kinematic relation for CNC stretch wrap forming machine were established by using translator, hinge and beam. Assuming the position of strain neutral layer located at the feature position of die surface, a solving algorithm for control parameters of jaw trajectory iso-curvature of stretch bending die was suggested. The result was used to control the jaw trajectory. Meanwhile, finite element model of bar stretch bending was established by using connector elements,and the influence laws of process parameters on springback were obtained. The springback results of simulation and experiment have the same tendency which proves that the method is reliable and effective.

Funds：

国家自然科学基金资助项目（51275420）；航空科学基金资助项目（2008ZE53037）

刘天骄（1988-），男，博士研究生

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