Due to the unique needs of the CNC grinding machine industry, machine tool manufacturers are also actively developing the mechanical part, and put forward unique control requirements for the CNC system of the grinding machine. There are:
(1) Inclined axis control: Linear and circular interpolation can also be performed when the axis is inclined.
(2) Spindle swing: a running cycle that often occurs in grinding, the execution of the program is interrupted by an external signal, the special preparation functions such as grinding wheel cut-in and grinding wheel dressing are used to compile fixed cycle programs. It is not only possible to use an external measuring device, but also to directly control the device to compare with the final dimensions when a suitable measuring head is connected.
(3) Strengthen the fixed grinding method: According to the different shapes of the grinding parts, there are four different grinding methods, with the function of controlling the angle of the grinding wheel axis, and a complete set of grinding for rough grinding, rough grinding, fine grinding and non-spark grinding. Cycle, grinding wheel dressing compensation function, control function of the dresser relative to the normal line of the dressing wheel, and the outer edge arc radius compensation function of the dressing roller. The system resolution can be set to 0.1μm, which belongs to a compact numerical control system.
(4) The CNC system of plane and forming grinding machine tools has flexible requirements for axis control expansion; it can control up to 9 coordinates, of which 6 coordinates can be linked, and the minimum pulse equivalent, moving equivalent and detection equivalent are all 0.1 μm. The fully closed loop method of linear position sensor [grating ruler, induction synchronizer] is also adopted.
(5) The flat grinding factory develops its own software, which is more suitable for plane and profile grinding. For example, the German JUNG company uses the company's special software to shape and dress the grinding wheel with the JUNGKONTUR programming language, and has a graphic auxiliary operation function. Japan's Okamoto company developed the OPL language for grinding, and so on.
(6) The increasing development of linear motor, dynamic balance and other technologies and processes has greatly improved the ergonomics of machine tools, and the development and utilization of appropriate measurement technology for the development and utilization of numerical control systems