磨床自定心中心架复位机构的设计与仿真

Design and Simulation of Reset Mechanism of Self-centering Center Rest for Grinding Machine

自定心中心架作为丝杠、曲轴等细长轴类零件磨削过程中的辅助夹具,对细长轴类零件的加工精度具有非常重要的意义。复位机构作为自定心中心架的重要组成部分,关系到自定心中心架的定位精度和使用寿命。针对一种刚性复位板机构进行研究,实现凸轮与夹臂之间的紧密接触和及时复位,并对复位板进行参数化设计与仿真,得到了其精确的数学计算模型。利用MATLAB软件求解了某型自定心中心架刚性复位板中曲线槽的轮廓,并用MATLAB、UG及Adams软件的协同虚拟仿真功能,验证了复位板数学模型的正确性和设计方法的可行性。

As an auxiliary fixture in the grinding process of slender shaft parts such as lead screw and crankshaft and so on,the self-centering center rest is of great significance to the processing accuracy of slender shaft parts.As an important part of the self-centering center rest,the reset mechanism is related to the position ing accuracy and service life of the self-centering center rest.A rigid reset plate mechanism is studied to realize close contact and timely reset between cam and clamp arm.The parametric design and simulation of reset plate is carried out,and its precise mathematical calculation model is obtained.The contour of the curve groove in the rigid reset plate of a self-centering center rest is solved by using MATLAB software.The correctness of the math ematical model of the reset plate and the feasibility of the design method are verified by using the collaborative virtual simulation functions of MATLAB,UG and Adams software.