Zhang Benxi, technical director of Dalian Huarui Heavy Industry Reducer Factory, is currently facing a turning point in how China's manufacturing industry has been upgraded from manufacturing to China. Independent innovation and comprehensive improvement of manufacturing technology are key points. Gears are the basis of industrialization. It plays a pivotal role in the widespread use of the entire manufacturing industry, and its manufacturing level often reflects the overall level of manufacturing in a country. 1. The status of the company's large gear processing The large gears processed by our company are mostly involute cylindrical gears. According to the general shape of the parts, they can be divided into large gears, gear shafts and inner ring gears. According to the heat treatment method, they can be divided into quenching gears, nitriding gears and carburizing and quenching gears. . Large gears generally require coarse and fine machining to separate. The processing of involute cogging is a key process. In our factory, the gears with ≤30 and the top diameter ≤6m can be used with large hobbing machines and standard insert hobs. For the forming process (see Figure 1), gears that exceed the above parameters should be considered for special milling equipment (such as large milling machines with indexing functions, boring machines, etc.) and special tools (such as finger milling cutters) , disc milling cutter, etc.) single-tooth profiling; large-sized inner ring gear machining is generally carried out on a CNC milling machine equipped with an internal cutter holder. The tool holder has a large loading space and can be installed with a large special insert disc. Type milling cutter. Gears with an accuracy level of 7 or higher or hard-toothed surfaces are used as finishing operations. At present, the maximum modulus of grinding teeth of our factory can reach 40, and the rotating diameter of the table of the largest grinding equipment can reach 4m. Related links: New technologies, new processes for large gear processing and new demands for machine tools Machine Guard High Speed Doors Nowadays, more and more automated machines are adopted in production line of factories. Workers need work together with these machines to finish whole production procedure. This may bring some dangers for people nearby the automated machine. Machine Guard High Speed Doors are specially used in production lines inside factory. Such rapid rolling doors enclose automated machines and protect nearby workers and avoid machine harms. Machine Guard rapid doors, Machine guard automatic doors, Machine guard fast action doors, Machine protection high speed door, Machine protection rapid door SHANGHAI KENVO DOOR CO.,LTD , https://www.kenvodoor.com
Zhang Benxi, Technical Director of Dalian Huarui Heavy Industry Reducer Factory 
figure 1