How to reduce the ball bearing noise? The following two aspects should be to:
(a) manufacturing process. Refining process flow, mainly refers to the process as soon as possible, process with processing, production without middle inventory, effectively reduce the affect low noise ball bearing performance process factors; Production of clean, this is a system technology, including grinding fluid, super semen, cleaning solution, air, high pressure air, production environment technology; Automation, from the car to the whole assembly process automation, less people or unmanned; Scale, especially such bearing mute the ball bearings, must form large scale, to a global market competition ability.
(2) equipment. High speed grinding, electric spindle precision, stiffness, life and all kinds of perfect testing protection performance of grinding machining accuracy and efficiency plays the leading role; Grinding technology, foreign grinder generally have in high speed grinding, ac servo control, the resolution 0.25 u, automatic simple operation, since the diagnosis function, etc.; Ultra precision technology, mainly in Osaka, Japan fine machine, as a representative of the careless supporting two worktables ultra precision and on German ladder Aaron house, as a representative of the hydraulic centering 4 Labour ultra precision in two ways; Online testing technology that since the 1980 s, Japan bearing industry on the initiative of the automatic measurement turned feedback control grinding super short term used the most common. In this way the mill in China constitute the automatic line application is mature, the current domestic existing article 100 or so. With the advanced industrial countries host technology constantly improve, on-line more and more simple, and gradually reduce or not active measurement and turned detection; A cylindrical grinder, round outside (KOYO, MIKROSA etc) widespread use of the rolling bearing wheel spindle unit, with the high rigidity, high precision, long life, loading and unloading convenient, use can * and a series of advantages; Lathe bed with a damping characteristics attenuation reduction; Adopting high precision into to budge ac servo system, the stable transmission communication frequency parts to adjust the system, can have online random intelligent measurement, can achieve CBN grinding wheel grinding, and so on, can achieve automatic on-line, roundness can reach 0.3 u m, scattered size up to 3 μ m.
Surface grinder, foreign double end (such as KOYO, Landis Gardner) surface grinder spindle is widely adopted in high precision, high stiffness rolling bearing spindle unit sand axle system, lubricating oil mist. With Gardner technology as an example, the companys research production system equipment for ninety DuoNian history, can be grinding bearing, ceramic, glass, rubber, plastic materials. The main technical automatic grinding wheel dressing and compensation, grinding wheel grinding head into give servo motor ball screw coaxial structure, grinding wheel inside and outside to rapid timing feeding, the precision can reach 0.25 u m, airframe placed in two level pad is peace weighing apparatus, instruments have since balance balance support stem, automatic adjustment and two level pad is in a horizontal plane, machine get a solid supporting effect, weighted in maintaining balance point is the concentricity of sand, increase dressing grinding wheel interval, workpiece to rotary, reciprocating into a, running through the type and special four forms, can use super bond diamond grinding wheel, diamond and CBN grinding wheel, high grinding accuracy, good stability, extremely long service life and convenient of grinding operation adjustment, can according to the requirements of the processing special preparation abrasive, binders, structure (circle, button, or link form), so as to achieve the best effect of grinding, parallel sent and flatness of 1 μ m.