自行车左中轴碗冷挤压成形工艺及模具设计  

Cold Extruding Forming Process and Die Design for the Bicycle Left Center Bowl

作　　者：陈伟[1] 陈丹[1] 

机构地区：[1]广东科技学院机电工程系,广东东莞523000

出　　处：《模具制造》2017年第9期57-60,共4页Die & Mould Manufacture

基　　金：广东省青年创新人才类项目粤教科函[2017]45号;项目编号2016KQNCX190

摘　　要：自行车左中轴碗是自行车上的重要受力件,其性能关系到自行车行驶的舒适性及安全性。一般采用拉伸等冲压工艺生产,用该工艺生产的零件杯底拐角处强度不够,而且容易拉裂,废品率高,零件力学性能也不理想。提出了自行车左中轴碗的冷挤压成形工艺,该工艺对壁厚较大件及变壁厚件的成形有独到的优势。比较了正反挤压及不同挤压速度的成形结果,结果表明反挤压(挤压速度0.5mm/s)工艺更有优势。Bicycle left central bowl is an important forced part of bicycle whose performances relate the comfort and safety of bicycles. Its classic processing technology is almost by the stamping process. The strength of the cup bottom comer parts of the process of production is not enough, and it is easy to crack, high rejection rate, mechanical properties are not ideal .In this paper, the extruding forming process of bicycle left central bowl of cold extruding forming process is proposed, and it has unique advantages due to the wall thickness or variable thickness parts. This paper compares the forming results of positive and negative extrusion and different extrusion speed, results show the anti extruding with 0.5mm/s speed has more advantages.

关 键 词：左中轴碗 冷挤压 工艺优化 模具设计 

分 类 号：TG37[金属学及工艺—金属压力加工] U484[交通运输工程—载运工具运用工程]