Rolling bearing technology file

Ring is one of the important parts, hydraulic bearing the weight generally accounted for about 60% of the total weight - 70%. Ring blank has 戦 pieces, of the warm extrusion and cold extrusion, pipe and bar, etc. , account for around 85% of the total set of round wool of forgings. Known from the analysis of bearing production labor, ring blank forging labor usually accounted for 10% of the total labor - bearing processing 15%. In bearing production, the ring of hair quality, productivity, will in the quality of bearing products, performance and important impact on the economic benefits of enterprises. This is because the size of the blank allowance ( Including blank forming way) Decided to bearing material utilization ratio, and blank size dispersity and geometry precision degree is caused the main reason for the rejection rate is high, can't normal automatic production. Blank processing technology, equipment, precision and performance determines the quality of billet. Blank quality directly affect the machining accuracy, cutting and the stand or fall of turning and grinding precision and efficiency. Due to different bearing structures, the size is not ー, GeChang equipment, technology conditions and production habits, bearing ring blank manufacturing process is also each are not identical. Data show that in addition to outside of tube and bar directly turning, the rest are used in forging forming. At present, some advanced technology such as cold rolling, cold extrusion, extrusion temperature and high speed forging has been adopted. Section 1 ring forging basic knowledge, Outlines the main purpose of the bearing ring forging processing is 1) Get close to the product shape of blank, so as to improve the utilization rate of metal material to save material, reduce mechanical processing capacity, reduce the cost. 2) Remove metal internal defects, change metal organization, make metal flow distribution is reasonable, good tightness, metal so as to improve the service life of bearing. According to the temperature of the metal forging, forging can be divided into three types of hot forging, cold forging and warm forging. Hot forging refers to heat the metal to over again product temperature forging processing; Cold forging refers to the variable shape: metal at room temperature and in between the metal deformation is called warm forging. The production of a large number of mainly is hot. Hot forging bearing cylinder production process mainly includes three links: heating, blanking and forging forming. Cause is a central part of the ring forging production, form a lot. Currently widely used in forming process can be roughly divided into three broad categories: hammer forging process, silver machine eye on building process and as a press. Most bearings by forging hammer (code Horizontal forging machine) Or after press forging forming, after forming broaching machine rolling