In order to realize the parametric design of the conjugate cam weft insertion mechanism,according to the necessary parameters of weft insertion process,ideal kinematic curves of the weft insertion mechanism were given...In order to realize the parametric design of the conjugate cam weft insertion mechanism,according to the necessary parameters of weft insertion process,ideal kinematic curves of the weft insertion mechanism were given,and the mathematical model of reverse solution for this mechanism was established.The parameters of this mechanism were obtained by reverse solution on the basis of the given ideal kinematic curves and kinematic requirements.The parametric design platform which was integrated with the functions of parametric reverse solution,motion simulation,three-dimensional modeling and virtual assembly was developed based on VB.NET and Unigraphics(UG) NX.After entering the technological parameters of weft insertion process and essential structural parameters by users,three-dimensional drawing of the main parts such as the conjugate cam and shaft,can be obtained by this platform,also the processing data of the cam can be calculated.This platform provides a rapid approach for parametric design of weft insertion mechanism.展开更多
The dynamic responses of roller gear indexing cam mechanism are investigated .With applying Lagarange equation and Gear method,motion equations of this mechanism including clearance,motor characteristic,torsion flexib...The dynamic responses of roller gear indexing cam mechanism are investigated .With applying Lagarange equation and Gear method,motion equations of this mechanism including clearance,motor characteristic,torsion flexibility are developed and solved.The results show that clearance affects primarily the response on turret,and has little effects on the responses on rotary table.At the same time,the velocity fluctuation of motor shaft is not serious for the existence of inertia of reducer,and the high frequency of velocity fluctuation of camshaft is related with the torsion stiffness of shaft and the clearance between pairs.展开更多
为了提高异型滚子弧面凸轮减速机构设计效率、规范设计体系,提出一种基于NX二次开发的参数化设计方法,并开发了设计系统。依据空间几何理论和共轭曲面原理,推导了圆柱滚子、圆锥滚子、球锥滚子、鼓形滚子、球滚子5种典型类型的异型滚子...为了提高异型滚子弧面凸轮减速机构设计效率、规范设计体系,提出一种基于NX二次开发的参数化设计方法,并开发了设计系统。依据空间几何理论和共轭曲面原理,推导了圆柱滚子、圆锥滚子、球锥滚子、鼓形滚子、球滚子5种典型类型的异型滚子及弧面凸轮工作廓面方程;提取关键设计参数,利用NX二次开发工具开发人机交互设计菜单和对话框,结合NX Open C/C++API和Visual Studio编译环境,开发异型滚子弧面凸轮减速机构参数化设计系统,并根据机构中各部件之间的装配约束关系,开发了自动装配功能。系统验证表明,开发的整套系统可以满足用户的个性化设计需求,有助于实现异型滚子弧面凸轮减速机构设计流程的规范化、标准化,实现快速设计与修改,缩短设计周期。展开更多
基金National Natural Science Foundation of China (No.50875243)Natural Science Foundation of Zhejiang Province,China (No.Y1110100)
文摘In order to realize the parametric design of the conjugate cam weft insertion mechanism,according to the necessary parameters of weft insertion process,ideal kinematic curves of the weft insertion mechanism were given,and the mathematical model of reverse solution for this mechanism was established.The parameters of this mechanism were obtained by reverse solution on the basis of the given ideal kinematic curves and kinematic requirements.The parametric design platform which was integrated with the functions of parametric reverse solution,motion simulation,three-dimensional modeling and virtual assembly was developed based on VB.NET and Unigraphics(UG) NX.After entering the technological parameters of weft insertion process and essential structural parameters by users,three-dimensional drawing of the main parts such as the conjugate cam and shaft,can be obtained by this platform,also the processing data of the cam can be calculated.This platform provides a rapid approach for parametric design of weft insertion mechanism.
文摘The dynamic responses of roller gear indexing cam mechanism are investigated .With applying Lagarange equation and Gear method,motion equations of this mechanism including clearance,motor characteristic,torsion flexibility are developed and solved.The results show that clearance affects primarily the response on turret,and has little effects on the responses on rotary table.At the same time,the velocity fluctuation of motor shaft is not serious for the existence of inertia of reducer,and the high frequency of velocity fluctuation of camshaft is related with the torsion stiffness of shaft and the clearance between pairs.
文摘为了提高异型滚子弧面凸轮减速机构设计效率、规范设计体系,提出一种基于NX二次开发的参数化设计方法,并开发了设计系统。依据空间几何理论和共轭曲面原理,推导了圆柱滚子、圆锥滚子、球锥滚子、鼓形滚子、球滚子5种典型类型的异型滚子及弧面凸轮工作廓面方程;提取关键设计参数,利用NX二次开发工具开发人机交互设计菜单和对话框,结合NX Open C/C++API和Visual Studio编译环境,开发异型滚子弧面凸轮减速机构参数化设计系统,并根据机构中各部件之间的装配约束关系,开发了自动装配功能。系统验证表明,开发的整套系统可以满足用户的个性化设计需求,有助于实现异型滚子弧面凸轮减速机构设计流程的规范化、标准化,实现快速设计与修改,缩短设计周期。
