The method of cutting workpieces using grinding wheels as cutting tools on a grinder. The characteristic of this method is that due to the high hardness and heat resistance of the grinding wheel abrasive particles themselves, grinding can process materials with high hardness, such as quenched steel, hard alloys, etc.

The method of using a grinding wheel as a cutting tool to perform inter cutting machining on workpieces on a grinder is characterized by: due to the high hardness and heat resistance of the grinding wheel abrasive particles themselves, grinding can process materials with high hardness, such as quenched steel, hard alloys, etc. The characteristics of the grinding wheel and grinder determine that the grinding process system can perform uniform cutting, generally ap=0.001~0.05mm; The grinding speed is very high, generally reaching v=30-50m/s; The grinder has good rigidity; By using hydraulic transmission, grinding can economically achieve high machining accuracy (t6~it5) and small surface roughness (ra=0.8~0.2wm). Grinding is one of the main methods for precision machining of parts. Due to intense friction, the temperature in the grinding area is very high. This can cause stress and deformation on the workpiece, and even burn the surface of the workpiece. Therefore, a large amount of coolant must be injected during grinding to reduce the grinding temperature, and the coolant can also play a role in chip removal and lubrication. The radial force during grinding is significant. This will cause the elastic retreat of the machine, bed, grinding wheel, and workpiece system, resulting in the actual cutting depth being less than the nominal cutting depth. Therefore, when grinding is about to be completed, the tool should not be used for smooth grinding to eliminate errors. After grinding, the grinding force also increases, causing the abrasive particles to break or fall off, and exposing the sharp edge again. This characteristic is called "self sharpening". Self sharpening allows grinding to proceed normally for a certain period of time, but after a certain working time, manual trimming should be carried out to avoid vibration, noise, and damage to the surface quality of the workpiece caused by the increase of grinding force. The grinding wheel is a cutting tool for grinding, and many small and hard abrasive particles and binders in it are bonded together to form multiple objects. The abrasive particles directly bear the responsibility. Cutting work must be sharp and have high hardness, heat resistance, and a certain degree of toughness. Commonly used abrasives include alumina (also known as corundum) Compared to silicon carbide, aluminum oxide abrasives have high hardness and good toughness, making them suitable for grinding steel materials. Silicon carbide abrasives have higher hardness, sharper edges, and better thermal conductivity, but are more brittle and suitable for grinding cast iron and hard alloys. For grinding wheels with the same abrasive, the surface roughness and processing efficiency of the workpiece are different due to their thickness. Coarse abrasives are used for rough grinding, while smaller abrasives are suitable for fine grinding. The coarser the abrasive, the smaller the particle size, and the bonding agent acts as a bonding agent for the abrasive. The commonly used is ceramic bonding agent, followed by resin bonding agent. The selection of different binders affects the insect resistance, strength, heat resistance, and toughness of the grinding wheel. The stronger the bond between the abrasive particles, the less likely the grinding wheel is to fall off, which is called the hardness of the grinding wheel. The hardness of a fat grinding wheel refers to the difficulty of the abrasive particles on the surface of the grinding wheel falling off under external force. Easy detachment is called soft, while the opposite is called hard. The hardness of the grinding wheel and the hardness of the abrasive are two different concepts. The surface of the workpiece being ground is relatively soft, and the cutting edges (corners) of the abrasive particles are less prone to wear, which allows the abrasive particles to be used for a longer time. For grinding machines, it is recommended to choose grinding wheels with stronger adhesion (higher hardness grinding wheels). On the contrary, grinding wheels with low hardness are suitable for grinding workpieces with high hardness. The grinding wheel works under high-speed conditions. To ensure safety, it should be inspected before installation and there should be no defects such as cracks; In order to ensure smooth operation of the grinding wheel, a motion leveling test should be conducted before use. After a certain period of operation, the surface of the grinding wheel will be hollowed out, and the sharp angle of the abrasive will grind the bell. The original geometric shape will be distorted, so it must be trimmed to restore cutting ability and correct geometric shape. The sand softening needs to be trimmed with a diamond pen. There are many types of grinders, mainly including surface grinders, external cylindrical grinders, internal cylindrical grinders, external cylindrical grinders (also capable of grinding inner holes), gear grinders, thread grinders, guide rail grinders, centerless grinders (for grinding outer circles), and tool grinders (for grinding cutting tools). This article introduces the surface grinder and its motion. The radial runout and axial honey motion of the grinding wheel spindle, as well as the motion error of the grinder head frame, not only affect the surface roughness of the workpiece after grinding, but also cause roundness and end face runout of the workpiece, resulting in uneven sparks during the grinding process. When the worktable moves on a non perpendicular vertical plane, it affects the straightness of the workpiece's generatrix on both the internal and external cylindrical grinders, resulting in large flatness errors on the workpiece during surface grinding. The centerline of the grinding wheel spindle axis of the external cylindrical grinder and the centerline of the grinding wheel axis axis of the internal cylindrical grinder are not at the same height as the centerline of the workpiece head frame axis. When grinding the inner and outer cones, the workpiece generatrix is hyperbolic, and the centerline of the grinding wheel spindle axis is not parallel to the direction of the worktable movement, which affects the flatness of the workpiece end face after grinding. The transmission error of the grinder has a significant impact on the machining accuracy of thread grinding and gear grinding.