Grinding machines used in standard machining

Published Time:

2020-02-05

In standard mechanical machining, the grinding machines and grinding wheel motors both operate according to conventional starting circuits. After the motor starts, it runs at its rated speed. However, due to fluctuations in grid voltage and constantly changing frictional loads between the grinding wheel and the workpiece, the motor speed inevitably deviates. Typically, standard grinding wheel motor starting circuits offer only a single processing speed, making it difficult to accommodate varying workpiece sizes and their corresponding relative linear speeds. As a result, it is challenging to ensure high precision in the finished products. Therefore, from the perspectives of improving machining quality, enhancing processing efficiency, and conserving energy, applying variable-frequency drive technology to grinding machines can yield highly satisfactory results. The mechanical machining industry processes a wide variety of products.

　　In standard mechanical machining, the grinding machines and grinding wheel motors operate according to conventional starting circuits. After the motor starts, it runs at its rated speed. However, due to fluctuations in grid voltage and constantly changing friction loads between the grinding wheel and the workpiece, the motor speed inevitably deviates. Typically, standard grinding wheel motor starting circuits offer only a single processing speed, making it difficult to accommodate varying workpiece sizes and their corresponding relative linear speeds. As a result, it is challenging to ensure high machining accuracy. Therefore, from the perspectives of improving machining quality, enhancing processing efficiency, and conserving energy, applying variable-frequency drive (VFD) technology to grinding machines can yield highly satisfactory results. The mechanical machining industry processes a wide variety of products with diverse workpiece sizes and differing precision requirements. Since the required grinding wheel speed often differs from the spindle’s linear speed, simply adjusting the spindle speed to meet the desired workpiece linear speed is seldom sufficient to achieve an ideal setting. Moreover, during the machining of shaft-like components, stresses and bending forces may arise, leading to variations in the feed torque applied by the grinding wheel during the grinding process. These variations cause fluctuations in the grinding wheel’s output speed and torque, which in turn give rise to issues such as chatter marks and burnt marks, making it extremely difficult to guarantee machining accuracy. Consequently, this leads to low production efficiency and a reduced rate of high-quality parts. With the advancement of power electronics technology, VFD technology has become increasingly widespread, and its application in the mechanical machining industry has yielded remarkable results. In particular, the stepless speed regulation, soft start function, and constant-torque output capabilities of VFDs perfectly meet the mechanical machining equipment’s demands for constant speed and constant torque.

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