Transactions of Materials and Heat Treatment

Title：Influence of extrusion direction on uniformity of metal part thickness in CNC incremental forming

Authors： Zhu Hu Chang Xiaodong Liu Yibo Bai Jinlan

Unit： Shenyang Aerospace University Guidaojiaotong Polytechnic Institute

KeyWords： vertical extrusion incline extrusion thickness uniformity CNC incremental forming sheet metal forming metal part

ClassificationCode：TG335.5

year,vol(issue):pagenumber：2016,41(10):32-37

Abstract：

For the issue of metal part thickness un-uniformity in CNC increment forming, a new technical method of incline extrusion forming with a certain angle between the horizontal plane and the extrusion direction was proposed. It could extrude the sheet metal along the direction vertical to the incline locus optimized by the forming angle. However, the traditional extrusion forming type was to extrude the sheet metal along the direction of Z axis by extrusion tool. Furthermore, the influences of incline extrusion and vertical extrusion on metal part thickness uniformity were compared and analyzed by the numerical simulation and actual forming experiment. The numerical simulation results show that the thickness difference of metal part obtained by vertical extrusion is 0.4011 mm, and it is 0.3883 mm by incline extrusion. So the latter is smaller and more uniformity. The actual forming experiment shows that the standard deviation of the metal part thickness by vertical extrusion is 0.099 mm, but it is 0.0933 mm by incline extrusion. Therefore, the latter is more uniformity in the thickness difference of metal part.

Funds：

国家自然科学基金资助项目(51175351)；辽宁省自然科学基金资助项目(2014024011)

作者简介：朱虎 (1964-)，男，博士, 教授 E-mail：zhuhu10@163.com

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