Cylindrical grinders are commonly used in production and processing equipment, which are widely used. In the operation of cylindrical grinders, the choice of abrasives is very important. Choosing suitable abrasives according to different grinders has a great impact on the processing quality of the materials and the service life of the grinders.

1. Abrasive selection for cylindrical grinder: Corundum grinding wheels are used for hardened or non-hardened steel rolls; silicon carbide grinding wheels are used for chilled cast iron rolls, rubber rolls, copper rolls, and granite rolls. For steel rolls of different materials, corundum grinding wheels should also be selected to obtain higher grinding accuracy and surface quality. For example, chromium corundum (PA) grinding wheels are used for alloy steel rollers, zirconium corundum (ZA) grinding wheels are used for heat-resistant alloy steel rollers, and single crystal corundum (SA) is used for stainless steel rollers.

2. Selection of grinding wheel particle size for external cylindrical grinder: Use coarse-grained (24~60) grinding wheel for rough grinding. Fine-grained (60~100) grinding wheels are used for fine grinding. 150 grit grinding wheel is used for precision grinding. For super-finishing grinding or mirror grinding, micro-powder (W63~W14) grinding wheels are generally used.

3. Selection of grinding wheel hardness of cylindrical grinder: the harder the grinding roller surface, the softer the grinding wheel hardness should be selected.
1) If the grinding wheel wears too fast, it means that the grinding wheel selected for the specific processing roll is too soft. The following improvement measures can be taken: 1.1. Increase the linear speed of the grinding wheel. 1.2. Increase the longitudinal feed speed of the carriage, that is, increase the longitudinal feed of the carriage per revolution of the workpiece to 2/3~3/4 of the width of the grinding wheel. 1.3. Reduce the speed of the roll.
If no obvious grinding effect is obtained after taking the above measures, it means that the grinding wheel is too soft and not suitable, and a harder grinding wheel should be selected.
2) If the grinding wheel is obviously blocked (difficulty) or dirty when grinding the roller, the passivated sand is not easy to fall off, the grinding wheel is easy to stick to the grinding debris, and the grinding roller surface is burned or napped, it means that the selected grinding wheel is too hard, and the following can be used Measures to improve: 1.1. Reduce the linear speed of the grinding wheel. 1.2. Increase the roller speed. 1.3 If no obvious grinding effect has been achieved after taking the above measures, it means that the grinding wheel is too hard, and a softer grinding wheel should be selected. 1.4. The choice of bond for grinding wheels of external cylindrical grinders Except for the grinding wheels with resin bond for mirror grinding, the other grinding types are better to use ceramic grinding wheels.
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