Grinding machines and grinding wheel motors used in standard machining are operated according to the traditional starting circuit. After the motor starts, it runs at the rated speed. Due to certain fluctuations in the grid voltage and the changing friction load of the grinding wheel workpiece, it will affect the motor speed error. The standard grinding wheel motor starting circuit generally has only one processing speed, which is difficult to adapt to different workpiece sizes.
Different cnc machining relative lines The speed, so that the machining precision of the processed workpiece is difficult to guarantee. Therefore, from the aspects of improving processing quality, processing efficiency, and energy saving, applying frequency conversion speed regulation technology to the grinding machine can obtain satisfactory results.
Machining industry has a wide variety of products, different workpiece sizes, and different processing accuracy requirements. Relatively requires the wheel speed to be different from the spindle linear speed. Simply adjusting the spindle speed to meet the workpiece processing linear speed is difficult to adjust to the ideal state. In addition, due to the stress bending caused by the shaft and rod machining process, the grinding process will produce different feed torques of the grinding wheel, which will bring different changes in the output speed/torque of the grinding wheel, and accordingly will produce vibrating blade patterns/burning patterns, etc., grinding accuracy It is difficult to guarantee, resulting in low production efficiency and low quality product rate.
With the development of power electronics technology, frequency conversion speed regulation technology is becoming more and more popular, and the application of frequency converters in the mechanical processing industry has received good results. Among them, the stepless speed regulation of the frequency converter, soft start, and constant torque output greatly meet the requirements of mechanical cnc machining china equipment for constant speed/constant torque