Grinding, super finishing technology

Bearing production, grinding labor accounts for about 60% of the total labor, the grinding machine used number also account for around 60% of the total number of metal cutting machine tool. Grinding costs account for more than 15% of the whole bearing the cost of production, therefore, is the key to the bearing manufacturing process of grinding. At present domestic general grinding of bearing industry, superfinishing process known as: outer ring: plane grinding - Outside diameter of grinding - Groove ( Roll) The grinding - Groove ( Roll) The superfinishing inner ring: plane grinding - Inside diameter of grinding - Inside diameter of grinding - Groove ( Roll) The grinding - Groove ( Roll) Ultra precision in the actual production, depending on the product accuracy requirements in the process of the above additional tempering process, or on the surface processing for two or three cycles. Grinding process with single machine processing, good enterprise with automatic production lines. Since the reform and opening up, China's bearing industry had a rapid development, especially the super grinding production technology has greatly improved, such as channel cut mill instead of grinding head, double end face grinding, cylindrical centerless grinding, wide ditch, Roll) The superfinishing process and branch lander groove grinding technology has been widely used, tell grinding also start the application. But relatively abroad bearing grinding processing, we also, there is a big gap in foreign advanced bearing manufacturing enterprise, the end face and outside diameter of grinding using CNC CNC automatic feeding, online automatic measurement, automatic compensation, grinding speed up to 45 m/s. Channel, the inner diameter of grinding has been adopt CNC numerical control machine tool, automation line production process, all process by computer centralized control, beat all the process parameters and production in strict accordance with the drawings design control, linear velocity of grinding wheel to 60 m/s. SKF grinding process of inner groove grinding speed has reached 120 m/s. Especially the use of high performance of CBN grinding wheel, make the production efficiency significantly. The development trend of bearing ring grinding, embodied in the following respects: ( 1) For bearing grinding machine, further realize single machine automation, to ensure high speed grinding, automatic measurement, make its can directly into the automatic line and reliable work. ( 2) Grinding production to step by step, systematically the development of automated production lines. At present, the world's leading bearing company grinding a high degree of automation, large quantities of products adopt automatic line production, and the automatic production line, less investment, quick effect, easy to stable production. ( 3) The development of related technologies. Such as all kinds of new furniture, high speed grinding wheel, superfinishing oil stone, coolant and lubricant, numerical control components, etc, constantly raise the level of the automation of process equipment. ( 4) The development of testing instruments. Detection level to a certain extent, reflects the level of industry, in the bearing industry should be development efficiency and precision for automatic line used by active measurement and special automatic testing instrument outside the lines. ( 5) Study on the composite grinding work. Composite grinding have combined machining process reduce The Times of the clamping and improve the machining accuracy, the advantages of so many foreign grinding machine has the function of the combined machining process, to catch up with the international level, the work must be developed in this area.