螺杆转子成形磨削砂轮的修整  

Research on the Grinding Wheel Dressing Method of Screw Rotor

作　　者：李志峰[1] 张彦坤[1] 王高勇[1] 王晓飞[1] 

机构地区：[1]陕西理工学院机械工程学院,陕西汉中723003

出　　处：《机床与液压》2014年第16期8-10,33,共4页Machine Tool & Hydraulics

基　　金：国家高档数控机床与基础制造装备科技重大专项(2011ZX04003-021)

摘　　要：成形砂轮的修整质量直接影响着螺杆转子的齿形精度和表面质量。根据空间啮合原理,建立了螺杆转子磨削加工的数学模型,推导了成形砂轮与转子的接触线方程。针对转子端面齿形为离散点的情况,通过三次样条插值法、追赶法和MATLAB内置fsolve函数的衔接使用求解出了砂轮的轴向截形。介绍了CNC砂轮修整器的工作原理,根据计算结果设计了砂轮的修整方案,研究了砂轮截形与中心距的变化规律并提出了数控程序编制的简化方法。该修整方法简单可靠、精度高,适合复杂曲线廓形的加工。The dressing quality of forming grinding wheel directly affects the tooth profile accuracy and surface quality of the screw rotor. Based on the meshing theory,the mathematical model of grinding screw rotor was established and the contact line equation between forming grinding wheel and the rotor was deduced. In view of the rotor＇s end-surface tooth for discrete points,the forming wheel edge shape was calculated with the bridging use of cubic spline interpolation method,chasing method and MATLAB built-in fsolve function. According to the working principle of CNC grinding wheel dresser,a scheme of the grinding wheel dressing was designed on the calculation results. A simplified method of CNC programming was put forward after studying the changing rules between grinding wheel＇s cross-sectional profile and center distance. This method is simple,reliable and high-precision,especially suitable for the complex curves.

关 键 词：螺杆转子 轴向截形 砂轮修整 

分 类 号：TG596[金属学及工艺—金属切削加工及机床]