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Customized view of bearing requirements
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(1) The temperature of bearings, gauge blocks, gauges and measuring instruments are the same when measuring; the ambient temperature rule is 20 ° C. They can be placed on the same metal plate; this can quickly complete the necessary temperature Balance. In order to get the right measurement results abroad; rely on mechanization of measurement to prevent human hands from touching these objects; or wear insulated gloves for operation.
(2) For the measurement of the inner or outer diameter of the bearing; the domestic rule is measured within the area where the south end of the ferrule is a maximum chamfering coordinate; and the foreign multi-rule is twice the chamfering coordinate at both ends of the ferrule. Measure within the area.
(3) The measurement pair is selected for the bearing scale public service in the comparison measurement method; the ruled quantity block or the standard part is used as the scale reference for the comparison measurement; the gauge block is necessary to conform to the rules of the standard JB/T1078 "quantity block"; It is necessary to meet the rules of the competent authority of the manufacturer.
(4) It is necessary to pass the calibration when measuring the appearance; and it has the accuracy and amplification ratio suitable for the bearing to be tested.
(5) In principle, it is possible to allow measurement errors to be less than 10% of public service.
(6) In order to reduce the measurement error; it is necessary to be within the range of energy; strive to reduce the pressure of the measurement table - measure the force; and increase the radius of curvature of the probe. When measuring the inner and outer diameter of the bearing; The radius of curvature of the head can be referred to the selection.
(7) When measuring bearings such as Kia, Kea and Sd; for cylindrical bore bearings; the taper of the tapered mandrel is in principle 1/5000-1/10000; for tapered bore uranium; the taper mandrel used The basic taper rule is 1/12.
(8) When measuring Kia, Kea and Sia, Sea and other items; the necessary measurement load should be applied; the rolling body and the ferrule should be in the normal touch position; to obtain a stable measurement value.
(9) Regarding the usual rolling bearing; the non-printing end face of the ferrule is taken as the reference surface when measuring; about the angular touch ball bearing and the tapered roller bearing; the end face receiving the thrust load is taken as the reference surface.
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