Main dip: To improve the KOYO bearing stiffness and eliminate operating noise compensation gap increased run-in wear and improve the guidance accuracy of the shaft, the use of this end extended bearing life.
KOYO bearings prior to installation of the internal gap (original gap) and the bearing internal clearance after installation to reach operating temperature (called things gap) between the former, followed by the application places the differences, many of the requirements of a negative run gap, ie the applied load, this pre-load to guarantee bearing common when the load conditions under preparedness due to slip and cause damage.
Pre-pressure is often the main indicators (dynamic load rating Cr) coefficients, optimal preload needs to be first, care about the pre-pressure test confirmed that the General Orders to the value determined is not absolutely correct implementation by the differences in conditioning essentials.
(1) strictly control lcrl8Ni9 ri, stainless steel box flange of forging heating temperature and heating holding time, to prevent the workpiece overheating of the workpiece to produce a coarse grain defects.
(2) work piece forging production, such as the forging ratio is too small, the final forging temperature is high, prone to coarse grained microstructure defects, the workpiece forging ratio appropriate, full and final forging temperature is moderate.
(3) KOYO bearing workpiece heat treatment solution treatment temperature is not too high, the holding time should not be too long, the heating temperature should be not higher than 1150 "C, holding time to a one l5min/mm calculation is appropriate.
(4), can be used to change the thick workpiece overheating organizations forging grain refinement method to eliminate defects, to prevent the workpiece in the cold deformation orange peel-like surface defects, to improve the quality of the workpiece surface.
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