Hardness selection

  • The particle size selection of the resin plate should consider the factors such as the size of the workpiece, the grinding rate and how to avoid certain defects. Grinding toughness is large for non-ferrous metal workpieces. Sharpening hardness of the tool. When grinding thin-walled parts and materials that have blocked the polishing sheet, thin flat cutting disc should be used; super-soft grinding discs should be selected for mirror grinding. 2. The workpiece material is the same, longitudinal grinding and plunge grinding, peripheral grinding and end grinding, cylindrical grinding and inner circle. Surface grinding, wet grinding in dry grinding, fine grinding in rough grinding, intermittent surface grinding Cutting and continuous surface grinding, etc., the former must use a harder than the latter. 3. High speed. High precision grinding. Steel blank grinding. Deburring of workpieces, etc., should choose harder grinding discs. Use characteristics As we all know, the standard cut off wheel for metal is the most important type of grinding tool in the grinding process. The grinding wheel is a porous body made by adding a binder to the abrasive, and compacting, drying and roasting. Due to different abrasives, binders and manufacturing processes, The characteristics of the grinding wheel vary greatly, so it has an important influence on the processing quality, productivity and economy of the grinding. The characteristics of the grinding wheel are mainly determined by factors such as abrasive, strength, bonding agent, hardness, structure, shape and size. The characteristics of the grinding wheel on the grinding machine are: Due to the intense friction, the temperature in the grinding zone is very high. This causes stress and deformation of the workpiece and even burns the surface of the workpiece. Therefore, a large amount of coolant must be injected during grinding to reduce the grinding temperature. The coolant can also be used. Chip removal and lubrication. The radial force during grinding is very large. This will cause the elastic retraction of the machine-grinding-workpiece system, so that the actual depth of cut is less than the nominal depth of cut. Therefore, when the grinding is to be completed, the grinding should be carried out without cutting the knife to eliminate the error.