Finished product rolling mill bearing 10 routine inspection and significance

Finished product rolling mill bearing 2020-10 routine inspection and meaning 08 - 24 lei duan rolling mill bearing mill roll system as an important component parts, especially the plate, belt, foil cold rolling mill roll system of rolling mill bearing, due to the mill to high speed rolling products to high quality, high yield and high precision in the direction of the high speed development, the configuration of the rolling mill bearing also require corresponding increase, especially in the following table lists the dimensional tolerance of bearing and other routine inspection of the project, the overall accuracy and operation stability of bearing is of positive significance. Table 1 rolling mill bearing the conventional serial number 3 clearance test content: extended bearing clearance is bearing and roller bearing clearance between inner and outer ring, namely not installed in the shaft bearing or bearing box, to fix them circle or outer side, and then make the bearing was not fixed on one side to do the maximum number of mobile radial or axial movement. According to the direction of movement can be divided into: radial clearance and axial clearance, depending on the state can be divided into: the original clearance; Installation clearance; Running clearance, double row or four columns in the cone bearing clearance specifications list example: table 2 double row and four row tapered bearing radial clearance unit um note: radial clearance conversion for generalization of axial clearance value ( Ga = Crx1。 5 / e; Gr radial clearance value, e coefficient, see table bearing size DMD technology contributes presents) Serial number 8 residual magnetic content the extensions: residual magnetic refers to the bearing in the process of production was magnetized, has not been eliminated after demagnetization maximum residual magnetism, the residual magnetic with magnetic induction intensity of the physical quantities, said its unit USES fine long hair, 太) , the residual magnetic inspection with the method of sampling inspection, sampling number according to the provisions of the JB / 3371 AQL acceptable quality level to 4, general level sampling inspection, on the principle of hall effect measurement. Because now bearing processing technical university part adopts electromagnetic chuck clamping, so after bearing parts precision machining, although after the demagnetization process of the machine tool itself, but there is a residual remanent magnetism, so the demagnetization process after adding machine. Products bearing the residual magnetic standard JB/T6641 - should be E. : 2017 table 3 mT bearing limit value of the residual magnetic unit serial number 10 with the roughness of the surface and end face harmonic content: table 4 match the surface roughness