Dimension measurement method of central diameters of two symmetrical beveled pockets of cage

Abstract

The invention relates to a dimension measurement method of central diameters of two symmetrical beveled pockets of a cage. A measured cage is similar to an isosceles trapezoid, the pockets are arranged at the width part of a beveled end; the inclined angle between the bevels at the upper end of the pockets and the upper end surface of the isosceles trapezoid is alpha; the minimal tolerance and the maximal tolerance between the dimensions of the central diameters of the two symmetric pockets are H1 and H2 respectively; through repeated measurement, the average value of the maximal external diameter is D, the average value of the internal diameter of a small end is d, the average value of the bevel end width is B, and then the minimal detection tolerance H01 and the maximal detection tolerance H02 of the central diameters of the two symmetric pockets of the measured cage are calculated according to the formulas that H01 is equal to D minus B*Cos alpha and H02 is equal to d plus B*Cos alpha, and H01 and H1 as well as H02 and H2 are compared, whether the to-be-measured cage meets the design requirement can be intuitively judged, and the measurement method is simple and feasible, the operation is convenient, and the measurement accuracy is high.

Description

technical field [0001] The invention belongs to the technical field of bearing detection, in particular to a method for detecting the central diameter of two symmetrical pockets in which the pockets of a cage are inclined planes. Background technique [0002] For the larger-sized tapered roller bearing cage, in order to improve its load-carrying capacity, the cage adopts a welded structure, and the end face of the pocket hole equipped with tapered rollers has a certain angle α with the horizontal plane of the cage. 1 And make the end face of the pocket hole be inclined. The dimensional accuracy of the central diameter of the two symmetrically arranged pockets is high and must fall within the range of the minimum design tolerance and the maximum design tolerance. If the central diameter is smaller than the minimum design tolerance, the bearing will be scratched or even stuck. If the central diameter If the size is larger than the maximum design tolerance, noise and harmful v...

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Problems solved by technology

[0003] combined with Figure 1, the existing detection method is to first measure the diameters d1 and d2 of the two symmetrical pockets with a vernier caliper, and then measure the diameters of the two symmetrical pockets respectively. The wall thickness C1 and C2 of the symmetrical pocket and the outer diameter of the cage, and then measure the maximum outer diameter D1 of the cage, Using the formula D1-[C1+C2+(d1+d2) / 2〕×Cosα1 Calculate the central diameter of the two symmetrically arranged pockets, the calculated central diameter of the pocket is unique, and whether it falls within the minimum design tolerance and the maximum within the design tolerance range, so the above detection method is cumbersome and complicated, and cannot intuitively judge whether it falls within the minimum design tolerance and maximum design tolerance range, and the detection process lacks certain accuracy

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