数控回转工作台摩擦片式刹车结构研究

分析数控回转工作台摩擦片式刹车结构的工作原理,利用悬臂梁在集中载荷下的挠曲模型推导摩擦片弹性系数和刹车扭矩的计算公式,并应用于实例计算。利用有限元方法校验摩擦片的弹性系数并计算回转工作台的扭转刚度。设计数控回转工作台刹车扭矩的检测试验,测试回转工作台在许用载荷和过载载荷条件下扭矩和形变的关系,验证回转工作台的刹车扭矩和扭矩刚度的计算结果。研究结果为数控回转工作台刹车结构的设计和机床整机调试提供依据。

Research on Friction Brake Disks Structure of CNC Table

Brake theory of CNC table friction discs was analyzed.Formulas of friction discs elastic coefficient and brake torque were derived by using deflection model of cantilever beam under point load and were applied in an instance calculation.Finite element method(FEM)was used to verify friction discs elastic coefficient and calculate the torsion rigidity of the table.Test of table brake torque was designed,and the relationships between torque and deformation of the table under permitted load and overload load were obtained respectively.The calculation results of brake torque and torque rigidity of the table were verified.The research results provide basis for the design of the brake structure of CNC table and the whole machine tool debugging.