Detection apparatus of pre-tightening force of angular contact bearing and detection method thereof

The invention discloses a detection apparatus of a pre-tightening force of an angular contact bearing and a detection method thereof. According to the apparatus, an axial dimension is adjusted to cooperate with a special-purpose measuring gauge for localization; a precise measuring tool is used for reading a pre-tightening spring to obtain a pressure value; and the compression value of the spring is adjusted to enable the pre-tightening force to reach a pressure range formulated by a bearing. During the assembling process, with the apparatus, the processing manufacturing cost and assembling adjusting cost of the equipment can be substantially reduced and quantitative detection and on-line adjustment of the pre-tightening force of the angular contact bearing can be realized, thereby substantially improving consistency and reliability of the equipment assembling and prolonging the service life of the bearing. The detection apparatus with low cost can be operated simply and conveniently and is easy to realize.