非对称楔横轧成形缺陷分析与模具参数的确定  

Analysis on Forming Defects during Asymmetric Cross Wedge Rolling and Determination of Die Parameters

作　　者：李凝[1,2,3] 王子孝 杨克己[1] 俞小莉[1] 陈卫增[3] 

机构地区：[1]浙江大学机械工程学系,浙江杭州310007 [2]浙江万里扬变速器股份有限公司锻造事业部,浙江金华321025 [3]浙江师范大学工学院,浙江金华321004

出　　处：《材料科学与工程学报》2015年第2期263-267,共5页Journal of Materials Science and Engineering

基　　金：浙江省博士后择优资助项目(BSH1302019)

摘　　要：分析了楔横轧生产过程中主要的成形缺陷:轧件不旋转、扭曲、折叠、心部缩松等,并提出了改进措施。根据轧制生产经验值及摩擦系数μ与模具成形角α、展宽角β之间的关系理论研究,建立了三者之间的关系曲线;并在此基础上分析了非对称楔横轧轧制过程中轴向力的不均衡问题,为楔横轧模具的参数选择提供依据。实验结果表明,优化后的模具轧制过程减少了轧件缺陷,提高了轧件质量。Defects formed on workpieces during cross wedge rolling were investigated. The defects are mainly skidding, reverse bending, folding, shrinkage, etc., and some improvement measures were taken according to the understanding of the defect formation. A relationship chart of the friction coefficient/, with die forming angle a and broadening angle /？ was set up combining the rolling experience and some theoretical researches. The axial force asymmetric problems are discussed based on the relationship chart. The results provide the fundamentals for the parameter selections of the cross wedge rolling die designs. The experiments were also done using the optimized die parameters, and considerably reduced defects and improved quality of the rolled pieces have been obtained.

关 键 词：楔横轧 非对称轧制 成形缺陷 模具参数 

分 类 号：TG335.1[金属学及工艺—金属压力加工]