合肥工业大学 a. 材料科学与工程学院； b. 工业与装备技术研究院，合肥 230009
出版日期:2019-06-28发布日期:2019-07-23作者简介:李萍(1973-)，女，黑龙江省哈尔滨市人，教授，博士生导师，主要研究方向为精密塑性成形工艺及组织性能.E-mail：li_ping@hfut.edu.cn.基金资助:江苏省科技计划项目(BA2016047)，江苏省南通市科技计划项目(GY22015008)Finite Element Analysis and Test Study on Shovel Spinning
LI Ping a,DAI Guangxu b,YANG Weizheng a,HU Chuanpeng a,WU Chao a,XUE Kemin aa. School of Materials Science and Engineering; b. Institute of Industry and Equipment Technology, Hefei University of Technology, Hefei 230009, China
Online:2019-06-28Published:2019-07-23摘要/Abstract
摘要： 针对含法兰盘双筒形零件内筒成形的铲旋工艺，设计了一种半封闭式双铲旋轮结构，基于Simufact软件平台建立三维铲旋刚塑性有限元模型，对铲旋工艺的成形效果进行分析，并采用CDC-60型旋压机床进行试模验证试验.结果表明，在铲旋成形过程中，变形区的金属始终处于受力不均、受挤压的状态，从而发生轴向、径向、切向的位移，并产生轴向长高、径向增厚的效应.在铲旋成形后期，底部金属所受小变形区的阻力作用增强，使其径向增厚受阻，从而在筒壁内侧出现了欠料缺陷，而且进给距离越大，其增厚效应和欠料缺陷越明显.试验所得旋轮内筒的有效高度和壁厚分别为350、6.9mm，超过铲旋厚度的15和3倍，试模试验结果与模拟结果的误差小于10%，从而验证了数值模型的可靠性和半封闭式铲旋轮结构的可行性.
关键词: 铲旋； 半封闭铲旋轮； 增厚效应； 欠料缺陷
Abstract: By introducing a double-spinning rollers and its semi-enclosed structure of shovel spinning, a 3D rigid-plastic finite element method model of the spinning process of the inner cylinder on double cylindrical parts with flange was established on the platform of Simufact, and was used to validate the forming effect. The material in the major deformation zone has the displacement toward the axial, radial and tangential directions due to the compressive stress with nonuniform distribution during shovel spinning processing, therefore the inner cylinder exhibits an increasing effect in the axial length and the radial thickness. At the later stage of forming, the metal at the bottom is easier to be subjected to the compressive stress from the metal in the small deformation zone, which results in the difficulty of radial thickness and the lack of material on the inside of the barrel wall appeared. The greater the feed distance is, the more obvious the thickening effect and the lack of material are. The spinning process was tested on the spinning machine of CDC-60, and the results show that the effective height and the effective thickness can reach to 35.0mm and 6.9mm, respectively, which are over 15 times and 3 times of the thickness of shovel spinning, the errors of simulated and test results were less than 10%. The feasibility of numerical simulation analysis and semi-closed spinning roller structure is verified.
Key words: shovel spinning; semi-closed spinning roller; thickening effect; lack of material
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