Three major factors affecting imports bearing grinding metamorphic layer

Three major factors affecting imports bearing grinding metamorphic layer you know shadow imported bearing grinding metamorphic layer which three factors are there? Don't know if it doesn't matter, today the author will tell you what are the three major influence, want to know the dear friends have to learn oh! The main factors affecting the imported bearing grinding transformation layer has two aspects, respectively is a function of bearing grinding forces and grinding heat, grinding force in grinding process, the outer surface of workpiece will be tight by grinding wheel cutting force, the role of force and friction force. In particular, the role of the latter two, make the outer surface of workpiece directional strong plastic deformation and strain hardening layer. The transformation layer inevitably affected the change of surface residual stress. ( 1) Cold plastic deformation layer in the process of grinding, every moment of abrasive is equivalent to a cutting edge. But in many cases, a cutting edge for negative rake Angle, abrasive besides cutting action, is to accept compression artifacts appearance ( The plough) , make the workpiece appearance left obvious plastic deformation layer. The deformation layer deformation grinding with grinding wheel dull level increases and grinding feed. ( 2) Thermoplastic deformation ( Or high temperature deformation) Layer of grinding heat in the work appearance of instantaneous temperature, make certain depth of the workpiece outside surface elastic limit down sharply, to reach the elastic dying of the light levels. Outside their work surface on the grinding force, especially under the action of tightening force and friction force, provoked comfortable stretch, was the limitation of the matrix metal, appearance is tightening ( More plough) Outer surface formed plastic deformation. High temperature plastic deformation on the conditions of the grinding process, with the temperature increasing of workpiece appearance. ( 3) Sometimes work hardening layer microhardness and metallographic method can be found that due to the machining deformation provoked outside surface hardness increases. Second, the grinding heat during the grinding, grinding wheel and workpiece contact zone, consuming energy, produce a large number of grinding heat and form a grinding zone of instantaneous high temperature. On the basis of the theory of linear motion heat source heat transfer formula derivation, calculation or by the method of infrared ray and measured experiment under the condition of instantaneous temperature thermocouple method, hair is 0. 1 to 0. The grinding area within 001 ms instantaneous temperature up to 1000 ~ 1500 ℃. The instantaneous high temperature, enough to make certain depth work looks outside surface to produce high temperature oxidation, amorphous group, high temperature tempering, secondary hardening, cracking and burns, etc. Select material can properly import bearing failure analysis is still necessary to think of elements. The main task of the imported bearing failure analysis, is based on a large amount of background information, analyze the data and the failure mode, find out the key elements of formation bearing failure, so that the improvement measures are put forward, in the usual, in use process requires regular maintenance of bearing precision, longer imported bearing retirement period, prevent premature failure of the bearing of sudden attack. Device condition is to use one of the primary elements of elements, imported bearing often because of the device is not suitable to incur the stress of bearing between the parts of a complete set of attack change, bearing in the abnormal state run and early failure. On the basis of imported bearing assembly, use, maintenance, the technical request, care about is accepted by the operation of the imported bearing load, speed, temperature, vibration, noise and smooth condition to stop monitoring and inspection, found that abnormal immediately to find the reason, stop adjustment, so that it is back to normal. First of all, reasonable structure design and equipped with advanced, just can have a long bearing life. Imported bearing manufacturing ordinary go through forging, heat treatment, turning processing, grinding and assembly process. The rationality of the processing technology, advanced, stability will also affect the service life of bearing. Which affects the quality of scrap bearing heat treatment and grinding process, often have a more direct relationship with bearing failure. Bearing of the bearing work appearance transformation layer in recent years, the research indicated, grinding process with close ties to the bearing surface quality. Imported bearing materials metallurgy quality used to be the main factor affecting the premature failure of the rolling bearing. In the metallurgical technology ( For example, the bearing steel vacuum degassing, etc. ) The progress of the original data quality improvement. The original data quality elements in bearing failure analyze the proportion of land had obvious, imported bearings but it is still one of the main influence factors of bearing failure. The content of the above is the author for all accounts, hope will be helpful to you!