The miniature bearing ring forging blank

Ring is one of the important parts, rolling bearing the weight generally accounted for about 60% of the total weight - 70%. Ring blank forgings, cold extrusion parts, a warm extrusion, pipe and bar, etc. , including forging to about 85% of the total number of cylinder hair also. 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 discretion of the ring blank 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, feet す size 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 summary of basic knowledge of bearing ring forging processing's main aim is to: 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, improve the 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 the metal is heated to above the recrystallization temperature of forging processing; Cold forging refers to the variable shape metal at room temperature; And in between the metal deformation is called warm forging. Mainly by hot forging has been widely used in production. Hot forging of bearing ring production process mainly includes three links: heating, blanking and forging forming. Forging cause is the center of the ring forging production link, form a lot. The forming process of currently widely used can be roughly divided into three broad categories: hammer forging process and forging machine forging process and press forging process.