In tool forming and grinding processing, the rationality of grinding wheel selection and the standardization of dressing directly determine the machining accuracy, surface quality, and production efficiency of the tool. As the core executing component of the grinding process, the grinding wheel needs to form a precise match with the tool material and forming requirements. Its dressing is the key guarantee for maintaining machining stability, and the two together constitute the technical core of tool forming grinding.

The selection of grinding wheels should be based on a systematic analysis of machining requirements, centered around three dimensions: tool material, grinding accuracy, and machining efficiency. The material of the cutting tool is the primary basis for selection: for materials with strong toughness such as high-speed steel, corundum grinding wheels should be selected, whose moderate hardness can avoid excessive wear of the grinding wheel during the grinding process; When processing brittle materials such as hard alloys and ceramics, silicon carbide grinding wheels are more suitable, and their excellent cutting performance can improve grinding efficiency. The grinding accuracy requirement directly determines the grain size of the grinding wheel. In precision machining scenarios, fine-grained grinding wheels are required to obtain smooth surfaces, while coarse-grained grinding wheels can be used to improve removal rates in rough machining. In addition, by combining the spindle speed and feed rate of the grinding machine, and reasonably matching the type of grinding wheel binder, resin binders are suitable for high-speed grinding, while ceramic binders have more advantages in high-precision forming.

Grinding wheel dressing is a necessary step to eliminate wear and maintain forming accuracy, and it needs to follow the standardized process of "precise detection step by step dressing effect verification". Before repairing, it is necessary to use tools such as a dial gauge to detect the radial and end face circular runout of the grinding wheel, and clarify the degree of wear and deviation range. When repairing, priority should be given to using a diamond dresser, and a reasonable dressing speed and feed rate should be set according to the type of grinding wheel: corundum grinding wheels can use a slightly faster feed rate, while silicon carbide grinding wheels need to control the feed rate to avoid repairing cracks. For formed grinding wheels, it is necessary to use a profiling and trimming device to ensure that the contour of the trimmed grinding wheel matches the forming surface of the tool accurately. Continuous cooling is required during the trimming process to prevent thermal deformation of the grinding wheel. After finishing, trial grinding is required to verify the finishing effect by checking the dimensional accuracy and surface roughness of the test piece until it meets the processing requirements.

In summary, the selection of grinding wheels for tool forming grinders requires precise matching of material, particle size, bonding agent, and processing requirements, while the dressing process relies on standardized operations to ensure stable grinding wheel performance. The collaborative optimization of the two can not only improve the quality of tool processing, but also extend the service life of grinding wheels, reduce production costs, and provide core technical support for the efficient development of tool forming and grinding.