How to choose a precision bearing manufacturer?-

There are many manufacturers of precision bearings today. Domestic precision bearing manufacturers and foreign precision bearing manufacturers have their own advantages and disadvantages. So as consumers, how should we choose a precision bearing manufacturer? Xiaobian has 35 years of internal experience in the industry, from the following three From the perspective of analysis, what conditions should precision bearing manufacturers have and how should our consumers choose precision bearing manufacturers? 1. For precision bearing manufacturers, the equipment needs to be very professional; (1) CNC lathes with high precision, reliability and high stability are used; for example, the most core and final production and processing process in the production of bearing rings is grinding. The equipment used by precision bearing manufacturers is mainly special CNC grinding machines and ultra-deep machining CNC lathes. The geometry of some types of bearing throwing rings is very simple, and the accuracy requirements are not high. Some bearing manufacturers can choose PLC economical and practical CNC machine tools; some types of angular contact ball bearings have higher throwing rings. For example, the raceway must be produced and processed into ' Convexity' of most appearances. Then our bearing manufacturers should use universal or high-end CNC machine tools, use fast high-speed motorized spindles for inner surface grinding, and use high bending rigidity sound-pressing wheel spindle bearings for outer surface grinding to make them perform fast grinding; ( 2) Apply semi-closed loop control and its closed-loop control servo control system; Use a good operating system to perform precise micro-tooling, and the screen resolution of the tooling can be assumed to be 0.25 μm or 0.1 μm, and repeatedly accurately position its own The accuracy can reach 1 μm or as high as 0.5 μm; the AC servo motor is used to drive and manipulate the grinding wheel dresser, reduce the dressing distance of the grinding wheel, and improve the dressing quality of the grinding wheel; (3) Apply high precision and bending stiffness and its wear-resistant ball screw and its sliding rails and other movable components; (4) the application of the bed with stable aging and its actual effect of vibration absorption; Compared with a good bed, a high-precision CNC grinder must use a granite bed with a strong vibration attenuation coefficient and a relatively low linear expansion coefficient. (5) Use better diamond saw blades and CBN grinding wheel blades; 2. Precision bearing manufacturers have very high requirements for the consistency of precision and precision; for angular contact ball bearings, in addition to the differences in raw materials and heat treatment processes, Accuracy and related problems are embodied in the grinding of parts, especially the consistency of machining accuracy and accuracy in mass production of precision bearing manufacturers. For example, P4 or more bearing throw rings have a large difference in production and machining accuracy. The one-time solution compliance rate of a precision bearing manufacturer is generally about 80%. And the matching rate is 60%. Some categories of bearings (eg tapered roller bearings for wind turbine shafts) can also maintain quality above P4. 3. Other core technologies and countermeasures that should be selected by precision bearing manufacturers; (1) Precision bearing manufacturers should reduce grinding capacity according to forging molding, deep processing or high-precision cold rolling, and adequately carry out additional work in the middle of each process. Quenching and cold violence to remove grinding stress and prevent excessive cutting speed from causing defects such as grinding burns and cracks to improve production machining accuracy and surface quality. (2) Precision bearing manufacturers should pay attention to improving the production and manufacturing standards of important parts such as turning bodies and ball bearings. Especially for high-precision cylindrical rollers and tapered rollers, automatic production lines are applied. High precision rollers must be thoroughly smoothed and embrittled. (3) Precision bearing manufacturers should pay attention to the processing link. In accordance with the regulations on temperature and humidity control, vibration reduction and cleaning, etc., the capital construction or renovation of the production and processing space environmental equipment is strictly required. (4) Precision bearing manufacturers should fully reflect the 'grasp-inheritance' feature in the production of high-precision parts, improve the technical training and practical experience accumulation of users, strict production process and processing technology organizational discipline, and strengthen quality Ensure the management system, so that 'mobile phone software' and 'hardware configuration' are consistent, so that excellent hardware configuration mainly shows stronger efficiency. As a precision bearing manufacturer with 35 years of experience, using high nitrogen bearing steel raw materials, bainite quenching process, low retained austenite, high speed and long life; more than 600 sets of special testing and measuring tools for various types of bearings and more than 180 professional processing equipment To ensure the quality of products before leaving the factory, our R&D team has 20 years of experience in the industry and can solve various difficult technical problems!