锻压技术

数控渐进成形中挤压方向对钣金件厚度均匀化影响

英文标题：Influence of extrusion direction on uniformity of metal part thickness in CNC incremental forming

作者：朱虎唱晓东刘一波白金兰

分类号：TG335.5

出版年,卷(期):页码：2016,41(10):32-37

摘要：

针对数控渐进成形中钣金件厚度不均匀的问题，提出一种新的挤压方向与水平面成一定角度的倾斜挤压成形方式。该方法采用根据成形角优化的倾斜轨迹，并沿着垂直于该倾斜轨迹的方向挤压板材。而传统方法多采用挤压工具沿Z轴方向的竖直挤压成形方式。采用数值模拟和实际成形实验相结合，对比分析了倾斜挤压方式和竖直挤压方式对成形件厚度均匀化的影响。数值模拟结果表明：竖直挤压时板材件厚度差为0.4011 mm，倾斜挤压时板材件厚度差为0.3883 mm，即倾斜挤压时板材件厚度差较竖直挤压时小，说明倾斜挤压时板材件厚度更均匀一些。成形实验结果也表明：竖直挤压时板材件厚度标准差为0.099 mm，倾斜挤压时板材件厚度标准差为0.0933 mm，因此，倾斜挤压成形较竖直挤压成形能够使板材件厚度分布更均匀。

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.

基金项目：

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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