两种横向蒙皮拉伸机构型设计及分析  

Design and analysis of two types of transverse skin stretch-forming machine

作　　者：杨伟 程军周[1] 张康武[1] 孙亚波[1] 浦文杰[1] YANG Wei;CHENG Jun-zhou;ZHANG Kang-wu;SUN Ya-bo;PU Wen-jie(China Heavy Machinery Research Institute Co.,Ltd,Xi'an 710018,China)

机构地区：[1]中国重型机械研究院股份公司,陕西西安710018

出　　处：《重型机械》2022年第1期70-75,共6页Heavy Machinery

基　　金：国家04专项(课题编号:2018ZX04007002)。

摘　　要：为实现横向曲率较小的单曲率或曲率变化平缓的蒙皮类零件拉伸成形,基于并联机构学理论,提出了两种横向蒙皮拉伸机构型。其中一种由2个SPU分支、2个SPS分支和1个RCR分支组成,另一种由2个SPU分支、1个SPR分支和1个RPS分支组成。采用螺旋理论分析了两种横向蒙皮拉伸机能实现横向拉伸的机构学原理并计算了自由度,阐述了拉伸机构的自由度全周性特性,对比分析了两种横向蒙皮拉伸机的区别,采用Solidworks三维建模软件对其中一种横向蒙皮拉伸机实现拉伸成形所需的拉伸、水平摆动和垂直摆动能力进行了验证。To achieve the stretch-forming of skin parts with small curvature or smooth curvature change,two types of transverse skin stretcher are proposed based on the theory of parallel mechanism.One configuration is made up of two SPU branches,two SPS branches and one RCR branch,and the other configuration consists of two SPU branches,one SPR branch and one RPS branch.The mechanism principle of two types of transverse skin stretcher to realize transverse stretch-forming is analyzed by using the screw theory,and their degrees of freedom are calculated.Based on that,the full cycle characteristics for the degrees of freedom for the stretch-forming mechanism are revealed.The differences between the two configuration are compared,and SolidWorks software is used to verify the stretching,horizontal swing and vertical swing ability for one of the transverse skin stretch-forming machines.

关 键 词：蒙皮拉伸机 并联机构 自由度 螺旋理论 

分 类 号：TH112[机械工程—机械设计及理论]