Forming method The cutting disc of the forming cutting disc grinding machine processed by the forming method is shaped into a tooth shape by the forming cutting disc dresser in the axial section, and the cutting disc holder can be fed in the vertical direction. The gear to be ground is supported by the indexing frame and the tailstock and is longitudinally reciprocated by the table to grind the tooth surface, and the indexing is performed after each tooth is ground. On a machine tool with a helical gear, the aluminum flat cutting disc can be rotated at an angle according to the helix angle of the workpiece, and the workpiece can be additionally rotated while reciprocating. If the machine cutting tray enables the cutting disc to enter the internal gear workpiece, the internal gear can be ground. The forming cutting disc grinding machine has a simple structure, high efficiency, and accuracy of up to 5 grades, which is suitable for batch production and is particularly suitable for gears with a small number of teeth (for example, less than 10). Exhibition method The gear grinding machine processed according to the forming method can be divided into four types according to the shape of the cutting disc. Dish-shaped disc grinding machine: The narrow side of two rotating disc-shaped cutting discs is equivalent to the two tooth faces of the rack. The workpiece is moved by the rolling disc and the steel strip, and the table reciprocates along the axial direction of the workpiece. Exercise to grind the entire tooth width. After each tooth is finished, the indexing head is divided by the indexing plate. This machine can also be used to grind helical teeth with additional equipment. If a cutting disc is inserted into the internal gear, the internal gear can be ground. This kind of machine tool is the generally horizontal layout. When the diameter is more than 1 meter, the vertical layout is used, and the precision is up to 4 grades. It is suitable for grinding high-precision gears. Conical cutting disc grinding machine: The axial section of the cutting disc is trimmed into a tooth shape of the rack and linearly reciprocated along the tooth direction. The workpiece is finished and indexed by a worm gear, a lead screw, and an exchange gear, but it is also used for rolling motion of the rolling disc and the steel belt, and the worm gear pair or the indexing disc is used for the indexing movement (see color picture). The helical gear can be ground when the cutting frame is rotated through an angle of the workpiece helix. This machine tool is easy to adjust and has good versatility. It is suitable for single-piece batch production and has a wide application. Worm cutting disc grinding machine: The principle is similar to the hobbing machine. The cutting disc is in the shape of a large-diameter single-head worm (see worm drive). Each time the flat abrasive cutting disc rotates, the workpiece rotates through a tooth. The transmission ratio is accurate, and some use of mechanical transmission. Some are driven by synchronous motors, and some are driven by gratings and servo motors. During grinding, the workpiece is fed in the axial direction (see machine tool) to grind the entire tooth surface. The cutting disc is turned by a diamond turning tool or rolled into a worm shape by a rolling wheel. The machine tool has a vertical layout, continuous indexing, and high grinding efficiency. It is suitable for machining medium-sized gears in batch production. It is especially suitable for gears with a large number of teeth, and the precision can reach 4 levels. Large flat cutting disc grinding machine: The working plane of the cutting disc is equivalent to one tooth surface of the rack, and the involute model (also with steel strip and rolling disc) is used to generate the forming motion. The cutting disc and the workpiece are not reciprocated in the axial direction of the workpiece. After grinding one side of the tooth surface, the indexing disc is used to divide the teeth, and all the tooth surfaces are sequentially ground. The workpiece is then turned around and the other side tooth surface is ground. The machine tool has a horizontal layout, simple structure, stable performance, and accuracy up to 3 levels. It is mainly used for grinding the shaper cutter, shaving cutter and measuring gear for metering.