There is a heat treatment tooth surface hardening process before grinding the hardened cylindrical gear, which will inevitably lead to heat treatment deformation, especially some irregular deformation. Although these conditions may be taken into account in the processing process design of the product, the grinding process of the cylindrical gear will still have a large amount of instantaneous processing at the initial stage of grinding, resulting in overheating, Grinding burns and grinding cracks appear. In view of this irregular change, the operator can not respond and respond in time only by observation.
Previously, for this situation, it was mainly to increase the tool setting point and try to find the highest point. In addition, for the sake of insurance, it is necessary to carry out treatment on the basis of finding the high point, increase the grinding of almost empty tool for several times, and then increase the time of cylindrical gear grinding. The cost of gear grinding process accounts for a large proportion in the product price. Controlling the time used for cylindrical gear grinding can control the product price and improve the market competitiveness of the product.
The time used for cylindrical gear grinding is mainly related to the machine tool feed parameters selected during tooth grinding. For the widely used formed cylindrical gear grinding machine, it mainly includes feed parameters such as cutting depth and stroke rate, and others include single-sided grinding or double-sided grinding.
After field machining verification, the pure grinding time is reduced to about half of the original by using the grinding current overload monitoring method of cylindrical gear grinding machine; The consumption of grinding wheel is reduced from 0.7 mm / piece to 0.5 mm / piece; The service life of diamond roller is extended by 33%. The grinding cost of cylindrical gear products is greatly reduced.
As the most commonly used finishing technology of cylindrical gear, the probability of grinding burn and grinding crack on the tooth surface of hard cylindrical gear still exists. Therefore, for important cylindrical gear products, it is essential to carry out tooth surface flaw detection and burn and acid corrosion inspection after cylindrical gear grinding. Reducing or even eliminating this probability is the future effort direction of processing technicians and operators.