The use of a diamond grinding wheel of the CNC tool grinder directly affects the normal use of CNC tools, a small part sometimes may cause the failure of the whole project. So today, we introduce the automatic dressing and compensation method of the diamond grinding wheel of the CNC tool grinder.
The development of fully automatic CNC grinding technology puts forward high requirements for its supporting equipment. As one of the supporting technologies, the online automatic grinding wheel dressing technology must meet the needs of modern CNC grinding technology and develop towards the direction of high precision, super stability, and fully automatic control. A diamond grinding wheel is widely used as an efficient grinding tool in the processing of hard alloy, ceramics, CBN and other superhard materials. The dressing and automatic compensation method of the diamond grinding wheel determine the performance of the fully automatic NC grinding machine. And to a large extent determines the service performance and service life of the grinding wheel.
During the actual dressing, the bowl-shaped diamond grinding wheel and the grinding belt of the GC cup grinding wheel are completely staggered and fitted and rotate at a certain speed respectively. The rotational linear speed ratio of the dressing wheel and the grinding wheel is located at 8:1. The dressing wheel is fixed, and the diamond grinding wheel is fed with dressing along the axis so that the GC cup grinding wheel and the bowl diamond grinding wheel can form mutual abrasive grinding. By grinding the end face of the two grinding wheels, the diamond grinding wheel passivation grinding particles are removed. The chip space is formed, the diamond grinding wheel surface is re-sharpened, and the purpose of dressing is achieved.
In the grinding process, the wear state of the grinding wheel is an important factor that affects grinding quality. The CNC tool grinder can monitor the state of the grinding wheel in the whole process of blade grinding. Depending on the size and material of the machined blade, the required grinding removal volume and grinding time are also different. Comprehensive consideration of each factor set automatic dressing interval. The number of times the grinding blade is counted and compared with the dressing interval set by the system in real-time. When the grinding number reaches the set number of dressing intervals, the dressing module is automatically invoked in the NC program to realize the automatic dressing of the grinding wheel. In order to ensure the safe operation of the machine tool, the control method also includes real-time monitoring of the life of the grinding wheel and dressing wheel. As long as it is detected that the dressing may cause the grinding wheel or dressing wheel to reach the pre-warning thickness. The machine will automatically send an alarm signal and stop the machine for manual processing. If the grinding wheel and dressing wheel do not reach the alarm thickness, the dressing will proceed smoothly. After finishing dressing, the compensation value of the grinding wheel after the dressing is output through data processing.