Research On Non-circular Gear Grinding Machine Control System

Noncircular gear is an important and special part which can be used in many transmission occasion , it is in the wide range of applications in the realization of variable transmission ratio, high-torque transmission. But it has always been a problem in processing and manufacturing, there is no effective method in harden processing. Based on the theoretical basis of the non-circular gear profile grinding theory, we can modify the three-axis machine tool to the 4-axes machine which can grind the surface of non-circular gear. Here is the research and development about the non-circular gear grinding machine control system in this paper.First of all, based on the principle of non-circular gear grinding by forming wheel, the main problem on how to transform the 4-axes synchronous movement into 3-axes synchronous movement is described in detail, considering high-speed rotary grinding wheel during the oscillating movement of the grinding wheel accuracy.Through the transformation of the motion analysis ,we get the gear rotation of monotonic characteristics in the process of gear grinding. Then we get the method of rotation axis as the leading axis in grinding process while other axes move at the same time. The interpolation points of single-axis are calculated, and the other two axes are calculated through two kinds of interpolation method. According to the supplementary motion of grinding machine, the double T-speed planning in realizing the Z-axis dividing process is meaningful to reduce the load caused by sudden contact with vibration and wheel damage. For the single-axis movement, we use a standard T-curve and S-curve speed planning for interpolation, the problem of velocity discretion will be solved in chapter 4.Through the experiment on the experimental platform, we can verify the validity and achievability of the principle of non-circular gear grinding. The results show that the principle of non-circular gear surface grinding is entirely feasible, the control system structure and control algorithm is available to be designed into reality.