Features of grinding wheel gear grinding machine of CNC saw blade gear grinding machine

 

1. Features of Generative Wheel Gear Grinding Machine

 

Generating gear grinding method is a gear grinding method based on the principle of mesh cutting. Generating gear grinding has simple requirements for the grinding wheel. When grinding the same module gear, only the same grinding wheel is required, and the dressing requirements for the grinding wheel are not high. Therefore, the generating gear grinding machine has been fully developed and formed a variety of Series products.

 

Among the generating grinding wheel gear grinding machines, the worm grinding wheel gear grinding machine is the most widely used. The processing principle is similar to that of a gear hobbing machine. A grinding wheel with a worm shape continuously meshes with the gear to develop the involute shape of the gear teeth. This method is one of the more efficient methods in the gear grinding process. It is more efficient in the batch grinding of small and medium module gears, and it is widely used.

 

2. Features of forming wheel gear grinding machine

The forming grinding wheel gear grinding method is a gear grinding method based on the forming process principle, which is to grind gears by using a grinding wheel with a specific profile. The forming gear grinding method is mostly used for the processing of gears with large diameters, large modules and few teeth. With the rapid development of modern numerical control technology, the advantages of forming grinding wheel gear grinding machines and forming grinding wheel gear grinding machines are more and more obvious, mainly in:

 

(1) Convenient operation and adjustment. The machine tool has no generated movement, simple structure, and more convenient control and adjustment.

 

(2) High efficiency. The grinding contact area of ​​the grinding wheel is larger than that of the generative grinding, and the grinding amount per unit time is greatly increased. At the same time, deep-cut slow feed and powerful cooling technology are adopted to reduce the number of rough grinding and further improve the grinding efficiency while reducing the probability of grinding burns.

 

(3) High grinding precision and good stability. The movement of the machine tool is relatively simple, so it moves smoothly without impact. The servo control system and position detection technology adopted by the CNC forming wheel gear grinding machine have greatly improved the machine tool movement accuracy. The use of CNC grinding wheel dressing technology and machine tool on-machine detection technology effectively guarantees the gear grinding accuracy of the forming wheel gear grinding machine. At present, the precision of forming and grinding teeth can reach 2 to 1, stable at 3.

 

(4) Wide application range. The application of CNC grinding wheel dressing technology makes it easy to realize gear dressing in form grinding. Various special tooth shapes, such as spline teeth, arc teeth, cycloid teeth, etc., can be ground by being equipped with corresponding software. Since the advantages of forming wheel gear grinding machines have gradually emerged, since the end of the 20th century, forming wheel gear grinding machines have been fully developed.

 

 

 

 

The working principle of CNC saw blade grinding machine

 

①Dish-shaped grinding wheel gear grinder: The narrow sides of the two rotating dish-shaped grinding wheels are equivalent to the two tooth surfaces of the rack. The workpiece is generated through the rolling disc and the steel belt, and the worktable moves back and forth along the axis of the workpiece. To grind out the entire tooth width. After each tooth is ground, the indexing head frame divides the teeth through the indexing plate. This machine tool can also grind helical teeth with additional devices. If a grinding wheel is inserted into the internal gear, the internal gear can be ground. This kind of machine tool generally has a horizontal layout. When the machining diameter is greater than 1 meter, the vertical layout is used, and the accuracy can reach 4 levels, which is suitable for grinding high-precision gears.

 

②Conical grinding wheel gear grinding machine: The axial section of the grinding wheel is trimmed into a tooth shape of the rack, and it reciprocates linearly along the tooth direction. The workpiece is developed and indexed through the worm gear, the lead screw and the exchange gear, but it is also used for the generating motion of the rolling disc and the steel belt, and the worm gear or the indexing disk is used for the indexing motion (see color picture). The grinding wheel holder can grind the helical gear when it rotates through an angle according to the helix angle of the workpiece. This machine tool is easy to adjust, has good versatility, is suitable for single-piece batch production, and has a wide range of applications.

 

③Worm grinding wheel gear grinding machine: The principle is similar to that of the gear hobbing machine. The grinding wheel is in the shape of a large-diameter single-head worm (see worm drive). Every time the grinding wheel turns, the workpiece turns one tooth, and its transmission ratio is accurate. Some use mechanical transmission. Some are driven by synchronous motors, and some are driven by grating and servo motors. During grinding, the workpiece is fed along the axial direction (see the machine tool) to grind the entire tooth surface. The grinding wheel is turned with a diamond turning tool or rolled into a worm shape with a rolling wheel. The machine tool has a vertical layout, continuous indexing, and high grinding efficiency. It is suitable for processing medium-modulus gears in batch production. It is especially suitable for gears with a large number of teeth. The accuracy can reach level 4.

 

④Large-plane grinding wheel gear grinding machine: The working plane of the grinding wheel is equivalent to a tooth surface of the rack, and the involute template (also useful with steel belts and spheronization discs) is used to generate generative motion. The grinding wheel and the workpiece do not make the axial reciprocating motion of the workpiece. After grinding one tooth surface, an indexing plate is used to divide the teeth, and all the tooth surfaces are ground in turn. Then the workpiece is 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 level 3. It is mainly used for grinding gear shaper cutters, gear shaving cutters and measuring gears for measurement.