What technology is used in the automatic dressing device of the grinding wheel of the High-Speed CNC Cylindrical Grinding Machine?

Diamond pen dressing of grinding wheel is to perform micro-cutting on the grinding wheel through point contact between the diamond pen and the surface of the grinding wheel to remove the passivated abrasive grains on the surface of the grinding wheel and restore the cutting ability of the grinding wheel. The operation is relatively simple, but the dressing efficiency is low, and the surface quality of the dressed grinding wheel may be affected by the skill level of the operator. In addition, the diamond pen dressing of grinding wheel is point contact, and the grinding wheel is difficult to dress flat.

Diamond roller dressing of grinding wheel is to dress the grinding wheel through the axial line contact between the diamond roller and the surface of the grinding wheel. The rotational motion of the diamond roller is combined with the rotational motion of the grinding wheel to form a relative motion, thereby removing the passivated abrasive grains on the surface of the grinding wheel. The dressing efficiency is high, but vibration is easy to occur during the dressing process, which makes the surface of the workpiece being ground easy to produce ripples and burns. At the same time, when the diamond roller is used to dress the grinding wheel, the technical requirements for the operator are also high.

GC cup wheel dressing technology is a more advanced grinding wheel dressing method. During actual dressing, the bowl-shaped diamond grinding wheel and the GC cup-shaped grinding wheel grinding belt are completely staggered and fit together, and they rotate at a certain speed respectively. The dressing wheel is fixed, and the diamond grinding wheel is fed along the axis direction to make the GC cup-shaped grinding wheel and the bowl-shaped diamond grinding wheel form mutual de-abrasive grinding. By grinding the end faces of the two grinding wheels, the passivated abrasive grains of the diamond grinding wheel are removed, a chip space is formed, and the surface of the diamond grinding wheel is re-sharpened. The GC cup-shaped grinding wheel dressing technology is easy to operate and easy to realize automatic dressing. At the same time, this technology can better ensure the geometric shape accuracy and surface quality of the grinding wheel, improve the grinding efficiency and the surface quality of the workpiece.

In the grinding process, the wear state of the grinding wheel is an important factor affecting the grinding quality. Therefore, the automatic dressing device of the grinding wheel of the High-Speed CNC Cylindrical Grinding Machine is usually equipped with a real-time monitoring system, which can monitor the wear state of the grinding wheel in real time. Depending on the size and material of the workpiece to be processed, the volume to be removed by grinding and the grinding time are also different. Therefore, the automatic dressing device for grinding wheels can comprehensively consider various factors and set the interval for automatic dressing. By counting the number of times the grinding wheel grinds the workpiece and comparing it with the dressing interval set by the system in real time, when the number of grinding reaches the set dressing interval, the dressing module is automatically called in the program to realize the automatic dressing of the grinding wheel.

After the grinding wheel is dressed, the abrasive becomes thinner and the actual contact range of the grinding wheel will inevitably change. When grinding again, if the set parameters before dressing are still used, the consistency of the grinding wheel size will be destroyed, and the dimensional accuracy of the machined workpiece cannot be guaranteed. Therefore, it is very necessary to compensate the grinding wheel after dressing. The automatic dressing device for grinding wheels can automatically adjust the grinding parameters according to the dressing amount of the grinding wheel to ensure the dimensional accuracy and surface quality of the machined workpiece.