CITIC Heavy Industry Xu Rui talks about the cutting of large-sized gears by Fu Nike CBN tools. The large-sized gears of the large-size gears are cut at 7-13.2 meters, semi-finished after quenching, which is the requirement of the process. 1. In the case of the large gear tooth tip circle after quenching, it is intermittent turning. Although several imported coated alloy blades are selected, the blade has no efficiency in cutting the gear after quenching, and the cutting efficiency is very low. , seriously affected the production schedule. 2, large gear blanks, high hardness, casting has risers, sand, pores and other defects, is always a turning problem: the riser hardness of the ring gear is higher, the original choice of alloy tool processing, the cutting edge will immediately turn red, cutting temperature It is very high, prone to chipping and chipping, and the tool life is very low, which is always a problem to be solved. In 2008, the Fenike salesman came to my company and said to try CBN tools. Under the guidance of the sales personnel, the trial cutting is carried out, and the cutting parameters are continuously adjusted to complete the processing of the large gear with quality and quantity. It is several times more efficient than the original tool. After successful trial cutting, CBN tools are also used when expanding to other difficult workpieces. For example, the roller sleeve of the high-pressure roller mill, the rope groove of the ship lift, etc., are all in use. Fu Nike CBN tool turning tooth top circle contrast machining position: gear tooth tip outer circle; gear diameter: D = 13.2m; material: 40CrMo; hardness: HB260-330 
In 2008, the processing efficiency of Fenike CBN inserts was increased by 5-6 times compared with foreign coated inserts, which greatly eased the production pressure. Since 2008, the processing efficiency of the Fenike CBN insert has been improved by 5-6 times compared with the foreign coated inserts, which has alleviated the production pressure. In 2009, the company had sales of 156,000, 10 years of sales of 1.2 million, 11 years of sales of 1.41 million, and 12 years of sales of 866,000. Introduction to CITIC Heavy Industry: one of the largest heavy machinery manufacturers in China; national innovative enterprises and high-tech enterprises; the world's largest manufacturer of mining equipment and cement equipment; China's low-speed heavy-duty gear processing base, large-scale casting and forging and heat treatment centers; The state-level enterprise technology center ranks third among 729 in the country; China's top 500 manufacturing enterprises; owns national key equipment for mine equipment and post-doctoral workstations; CITIC Heavy Industries has transformed from production-oriented to research-based enterprises and has become a national innovation Type enterprises and high-tech enterprises. CITIC Heavy Industries has realized a transition from production to R&D-type enterprises. CITIC's annual R&D expenditure is 8.6%, new product contribution rate is over 70%, and R&D and process technicians account for a quarter of all employees. The company was listed on A shares on July 6, 2012. Safety Shoes,Work Shoes,Safety Footwear
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