摘要
提出了以四自由度1PS+4TPS型混联机构为主进给机构,辅以双向移动工作台实现多坐标数控加工的一种新型混联机床的布局设计方案。该混联机床方案中定平台通过4个结构完全相同的TPS驱动分支以及一个PS约束分支与动平台相联,动平台可以实现一维平动和三维转动,该方案具有可实现姿态角大、工作空间大等优点。对主进给机构进行了机构设计,推导出了主进给机构一、二阶运动影响系数矩阵,建立了主进给机构封闭形式的运动学方程。文中给出了运动学分析的数值实例。
A structure scheme for a novel hybrid machine tool （HMT） is proposed in this paper. In this scheme, a 4-DOF（degree of freedom） spatial hybrid mechanism is utilized as the main feed mechanism, with assistance of a two direction movable worktable, multi-coordinates NC machining can be realized. The stationary platform is connected with the moving platform by the same four TPS driving links and a PS constraint link, one translation DOF and three rotation DOF can be achieved. This type of HMT enjoys some advantages over its conventional counterparts： larger workspace, better dexterity etc. Mechanism design for main feed mechanism of HMT is carried out, one and two order influence coefficient matrixes of the main feed mechanism are derived, closed form kinematic equations of the main feed mechanism are established. Numerical examples are given for illustration.
出处
《机械科学与技术》
CSCD
北大核心
2005年第9期1083-1086,共4页
Mechanical Science and Technology for Aerospace Engineering
基金
四川省应用基础研究项目(02GY029-033)资助
关键词
混联机床
混联机构
机构设计
运动学分析
Hybrid machine tool
Hybrid mechanism
Mechanism design
Kinematics analysis
