Design Of A Research Platform To Measure Bore Alignment Error Based On Laser Calibrate And Photoelectric Detecting Technology

Rotating shaft and bore is the heart and soul of many machines. Additional vibration and friction resulted from misalignment of rotating machinery can result in equipment failure and reduce the service life. Misalignment of rotating machinery costs billions of dollars worldwide every year. How to measure the shaft or bore alignment error fast, efficiently and correctly is the key technology to avoid the disaster.After hundreds of years of development, shaft alignment error measurement has achieved great success. Based on PSD and laser technology, the laser alignment machine has realized automation, high precision on-line monitoring of shaft alignment error measurement, and a large number of standardized products have been produced. Based on technical solutions to the shaft alignment error measurement, are being applied to a large number of research holes concentricity error measurement. In this thesis, a bore alignment error measurement platform has been designed, which is based on PSD and laser technology, for measuring aperture parts with pore diameter of 400 mm.The main work includes the following aspects:(1) Analyze the relevant national standards and machinery industry standards about the demand of shaft and bore alignment error measurement methods.(2) Analyze the currently available mature technology solutions for concentricity error measurement. Analysis of the dial indicator method, the laser alignment method, which based on PSD and technical principles of Coordinate Measuring Machine, as well as comparison both advantages and disadvantages of the three above-mentioned methods.(3) Model and analyze the four methods for roundness error measurement, being introduced in the national standard, and derivation of the corresponding data processing algorithms.(4) Propose a bore alignment error measure platform based on laser line calibration. Build the mathematical model of the design of the bore alignment error measurement platform, as well as derivation the data processing algorithm based on the least squares method and the criterion of the axis of rotation. The system can achieve the accuracy up to 5 microcons.(5) Design a mechanical platform operated auxiliary by embedded software and hardware control, which is driven by the servo motor, ensuring a high angular accuracy. At the same time, the design of system sample program, which is based on Python, debugging and preliminary experiments of the system, as well as giving further improvements according to the summary of the design process and experimental results.