Grinding principle of centerless grinding machine: Centerless grinding method is composed of three organizations: grinding wheel, adjusting wheel, and workpiece holder. During this process, the grinding wheel is used to perform grinding operations. The adjusting wheel controls the rotation of the workpiece, and causes the workpiece to generate feed speed. As for the workpiece holder, which supports the workpiece during grinding, there can be several cooperative methods for these three types of machines, but the principle of stopping grinding is the same.
The MG1020 centerless grinder is a very profitable machine tool due to its high accuracy, efficiency, and stability. However, due to its high price, few people ask about it. A new 1020 costs more than 130000 yuan, but an old 1020 only costs about 50000 to 60000 yuan. If you are smart enough, let me teach you to treat an old machine tool as if it were new, with the same accuracy and stability:
Check whether the outer diameter of the grinding wheel shaft is 75MM. If it is smaller than 5 wires, it is recommended to replace the shaft and make a 75MM plus 10 wire pig iron grinding rod to grind the bearing bush until all of them are in contact. During installation, make an inner hole of 75 plus 2 wires. A concentric sleeve with an outer diameter of 110 minus 2 wires is used to adjust the concentricity of the machine tool's main shaft and the machine tool's housing. It is also necessary to ensure that the lateral clearance of the main shaft is not greater than 0.01 mm, and the grinding wheel shaft can be easily changed by hand.
Since the MG1020 uses a hydraulic self smoothing guide rail, it is necessary to completely disassemble and clean the hydraulic system and adjust the pressure from the beginning. For details of the pressure, please refer to the manual. Make a mark at the junction of each component, and then disassemble the machine tool subsystem. 1. Grinding wheel system. 2. Grinding wheel dressing system. 3. Guide wheel system. 4. Guide wheel dressing system. 5. Hydraulic system. 6. Smooth system. Please place the accessories and bolts of each component in categories to avoid confusion or loss.
Check that the dresser and the oil cylinder are disengaged, and pull the dresser with your hand to ensure it is smooth and free of weight. Shake it with your hand to the left and right without gaps, and do not scrape it. Handle the shaft and bearing bush of the guide wheel in the same way as the grinding wheel, and then adjust the guide shaft of the machine tool with a concentric sleeve to ensure that the lateral clearance of the shaft is within 0.002MM and there is no axial transmission. There must be no abnormal noise after driving