The Research On Automatic Examination And Grading System Of Bearing Inner And Outer Rings

A set of automatic device of detecting and grading system of bearing inner and outer rings based on V-block three-point method and labview software had been designed to improve traditional bearing detection mode. The device use a new linear laser micro-displacement non-contact measurement sensor and can measure roundness of cylindrical workpiece with high precision. The main contents of the study as follows.1. The items for test bearing rings was analyzed, roundness error was determined for bearing rings testing and grading. The V-block three-point method for roundness measurement was chose and introduced in detail . The program based on V-block three-point method is easier to write than the conventional analysis scheme based on Fourier transformation.2.The construction of testing and grading system are described in detail. Measurement and control system are made up of the control host computer, motion control card and intelligent laser micro-displacement sensor. Adjustable Mechanical system can measure bearing rings with 60-120mm outer diameter and be automatic grading. The orientation and transmission of bearing ring depend on adjustable cylinder which improved the testing efficiency of the system greatly because of its adjustability, low pollution, few non-measuement time. However, there are still some drawbacks on bearing ring orienting and rotating. So, a schedule which the bearing ring clamped with elastic friction gear and the baric expanding arbor adopted as driving link was given, then, a detailed theoretical and mechanical design introduction about the above schedule was described. Also, the factors which resulted in measure error was analyzed.3.In the last chapter, the study contents and conclusions of the dissertation have been summarized and the further works have been forecasted. With open system, the device would contribute to engineering application and theoretical study of roundness error. Expanding function of this device can be carried out only by modifying control software.