Grinding wheels need to be replaced when grinding gears of different modulus

release time:

2022-02-15

Grinding wheels need to be replaced when grinding gears of different modulus

Gear grinding is to finish the tooth profile of the hardened gear on the gear grinding machine. After the gear is ground, the precision of the gear can reach more than 6 grades. According to the formation method of the tooth profile, there are two types of gear grinding methods: forming method and generating method, but most types of gear grinding machines use generating method to process gears. The gear grinding machine that works with the continuous indexing method uses a worm-shaped grinding wheel to grind the gear teeth, so it is called a worm grinding wheel gear grinding machine. Its operating principle is the same as that of the gear hobbing machine, but the axial feed movement is generally ended by the workpiece, as shown in the figure. Due to the continuous grinding during the processing, its productivity is the highest among all kinds of gear grinding machines. Its disadvantage is that it is difficult to dress the grinding wheel, and it is not easy to achieve high precision. When grinding gears with different modulus, the grinding wheel needs to be replaced. The speed of each transmission link in the transmission chain connecting the grinding wheel and the workpiece is very high, and mechanical transmission is easy to generate noise and wear. faster. This gear grinding method is suitable for batch and mass production of small and medium modulus gears.

The methods of tooth direction modification mainly include tooth end thinning, helix angle modification, drum modification and surface modification. Tooth end thinning is to gradually thin the tooth thickness toward the end in a small tooth width at one or both ends of the gear tooth. It is a simple modification method, but the trimming effect is poor.

In order to meet the positioning requirements of high-precision gear machining, the finishing machining of the gear blanks is all done by CNC lathes. The inner hole and positioning end face of the gear are processed first, and then the other end face and outer diameter are processed synchronously. It not only ensures the straightness requirements of the inner hole and the positioning end face, but also ensures that the size dispersion of the mass production of tooth blanks is small.

According to different structural requirements, the primary process of gear parts processing is casting billet→normalizing→finish turning→shaping→chamfering→hobbing→shaving→(welding)→heat treatment→grinding→alignment dressing . After heating, the gears are generally no longer processed, except for the main and secondary gears or the parts that the customer requires to grind the gears. The production mode of gear grinding processing enterprises must adapt to changes in the market. It must change from the mass production mode that was suitable before the market was relatively stable to the mass customization production mode that adapts to market changes. It can adapt to multiple types (adapt to market demand) ) can form a large batch (reducing production costs).

Conflict, lubrication theory and lubrication technology are the basic tasks in gear research. Studying elastohydrodynamic lubrication theory, promoting the selection of synthetic lubricating oil and appropriately adding pressure additives in the oil can not only improve the bearing capacity of the tooth surface, but also Can advance transmission power. High-precision gear processing band sawing machine is a kind of equipment with high technical content and messy structure. Especially with the rapid development of the automobile industry and wind power generation, the demand for gears is increasing. The power, quality and processing cost of gear processing The requirements are getting higher and higher, so that the gear processing band sawing machine occupies an increasingly important position in the work of automobiles and wind power generation.