磁力支架零件步进式等厚冲锻成形新工艺  

New Forming Process of Stepping Press Forging with the Uniform Thickness for Magnetic Bracket

作　　者：王可胜[1] 韩豫[1] 刘全坤[2] 程晓民[1] 

机构地区：[1]宁波工程学院机械学院,宁波315016 [2]合肥工业大学材料科学与工程学院,合肥230009

出　　处：《机械工程学报》2015年第4期78-83,共6页Journal of Mechanical Engineering

基　　金：国家自然科学基金(51275251);浙江省自然科学基金(Y1111068)资助项目

摘　　要：针对两直臂间距较小、展平时发生干涉的等厚板材磁力支架零件,提出磁力支架零件步进式等厚冲锻成形新工艺,该工艺首先使用冲压制造出两直臂间距较大的板材零件,再分几个工步拉深两直臂的连接载体,逐步缩短两直臂间距直到目标间距为止,每个工步通过等厚冲锻工艺将局部增厚的材料减薄到原板材厚度。运用理论分析和试验方法,分析及优化拉深两直臂连接载体的形状,建立两直臂连接载体的流线型拉深的数学模型,基于该数学模型,以磁力支架零件无工艺缺陷为目标,采用数值模拟优化流线型拉深工艺参数且得到磁力支架等厚冲锻成形的步进系数。研究结果表明,运用步进式等厚冲锻新工艺三个工步可以制造出无工艺缺陷的磁力支架零件,试验结果同数值模拟结果吻合。A new forming process of stepping press forging with the uniform thickness is put forward because of the interference problem when unfolding uniform thickness sheet parts with the smaller distance between two vertical walls of magnetic bracket. In this method, the part of sheet metal with a larger distance between two vertical walls is manufactured by stamping process, and then the larger distance is shortened gradually by drawing the connection body for two vertical walls during several working steps until the target value. It is noteworthy that in each step the local thickened material is reduced to the original plate thickness by press forging process. The drawing shape of the connecting body is analysized and optimized by the theoretical study and experiments, and a mathematical model for the streamlined shape drawing is established. Based on the mathematical model, and the magnetic bracket without process defects are regarded as the goal, the process parameters of streamlined shape drawing are optimized. Mean while, the stepping coefficient of press forging with uniform thickness for magnetic bracket is obtained. It is shown that the magnetic bracket parts without process defects can be produced by a new forming process of stepping press forging with the uniform thickness during three working steps, and the simulation results are in good agreement with experimental data.

关 键 词：磁力支架 步进式等厚冲锻 流线型拉深 数值模拟 

分 类 号：TG386[金属学及工艺—金属压力加工]