Effects of rolling bearing inner ring causes import channel roundness 62211-2RS

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1 rolling bearing inner ring raceway roundness is an important indicator of quality, directly affect the import bearings working accuracy, stability and service life. Grinding is usually the inner channel of the semi finishing and finish machining process, the finished inner ring raceway roundness plays a decisive role, the inner ring raceway grinding roundness in addition to precision and dynamic characteristic depends on the grinding process system, but also closely related with the process parameters of grinding. The former, has attached great importance to many scholars, and made a lot of research, thereby greatly improving the grinding inner ring raceway roundness. With the increase of precision grinding system and the improvement of dynamic characteristics, the grinding process parameters is the main factor affecting the roundness, so the research of grinding process parameters influencing the roundness, the reasonable selection of process parameters, to ensure that the grinding imported bearing raceway roundness, and then realize the process parameters of grinding imported bearings channel optimization, there is an important significance.
2 import bearing inner ring channel is usually adopts variable feeding speed grinding, the grinding cycle can be divided into: the fast reaching, coarse feed, feed and no fine grinding stage four. The main factors affecting the grinding imported bearing raceway roundness can be summarized as follows: (1) in the process of precision grinding technology, parameters and precision positioning principle, depending on the accuracy and jig grinder structure: (2) the dynamic characteristics of technology system, especially the balance state: in the dressing and grinding wheel in the process, grinding wheel unbalance, causes forced vibration, due to wheel dresser of grinding wheel and the relative position and the relative position of the grinding wheel and the workpiece during grinding the difference, and this process system under two different conditions different stiffness of the vibration caused by the surface grinding is not round: grinding technological parameters effect of the grinding wheel and the workpiece, the contact stiffness of wheel wear process and technology system vibration damping characteristics, which influence the vibration characteristic of the grinding process, the grinding workpiece geometry ultimately reflected (i.e. roundness) and other surface quality: (3) the process system of the elastic deformation of the workpiece caused by the original errors of reflection: analysis the grinding cycle workpiece geometry error variation, workpiece geometry error after grinding, reflecting mainly depends on the process system rigidity, the grinding process parameters The wear of the grinding wheel and the workpiece speed, the original error?. Considering the above factors, when the rigidity of processing system and dynamic characteristics (especially when the wheel must be good balance), the roundness error of workpiece depends mainly on the grinding process parameters, thus the regression modeling grinding roundness testing data, pick the important parameters from multiple process parameters, the gradual introduction of the regression equation, the optimal so as to establish the relationship between grinding roundness and process parameters of the regression equation.
Machine tool vibration caused by the unbalance of grinding wheel 3 or other factors, will seriously affect the grinding the workpiece roundness. Keep the machine in good working condition of grinding wheel and a good balance, is a prerequisite for roundness mathematical model in front of the fitting. In add. In addition, the grinding wheel hardness, microstructure and particle size and abrasive type is different, and the cooling liquid composition is different, will be on the grinding roundness influence.

234407BM 234706BM 234406BM 517/2860V/YA 5610/2500 517/1720X1V 527/1181M 510/1180M 517/930 510/670 590/560 510/500 52780 59080 517/368M 51760U 517/238 6207-2ZN 6206-2ZN 6205-2ZN 6204-2ZN 6203-RZ 6203-2ZN 6202N 6202-2ZN 6201-2ZN 6200ZZ 6200-2ZN 62/32-ZN 62/32-Z 62/32N 62/32-2Z 62/32-2RZ 62/32-2RS 62/28-2RZ 62/22-2RZ 61996 61992 61988 61984

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