Research On Measurement Analysis And Visual Representation Method Of Gear Overall Deviation

Gear is an important drive component in modern manufacturing industry,which has many advantages such as high efficiency,smooth movement and compact structure.Gear is widely used in transmission systems in the fields of aviation,high-speed rail,ships,vehicles,etc.With the development and progress of high-end equipment,the requirement of gear geometric accuracy detection in manufacturing industry is constantly increasing.Gear geometric accuracy detection methods have many kinds,among which laser measurement has become the main research direction of gear measurement due to its advantages of high efficiency,good accuracy,fast dynamic response and low cost.However,at present,laser measurement methods for gear are limited to deviation analysis on specific tooth section,and the results of deviation are expressed in numerical form.It is difficult to accurately and intuitively evaluate the size and distribution of geometric deviations on the full tooth surface of gear.Therefore,it is very important to develop a method which can measure,analyze and visualize the geometric deviation on the full tooth surface of gear.Aiming at the problems existing in current gear laser measuring method,this paper firstly proposes a method of measuring and visualizing the geometric deviation of non-contact gear based on laser displacement sensor,and develops the corresponding laser measuring device and the visualization analysis software of the overall geometric deviation,which can measure the geometric deviation of all types of gear on the whole tooth surface accurately and efficiently.The measurement results can be visually expressed,thus the size and distribution of each deviation on the whole tooth surface can be analyzed more intuitively.In this paper,the measuring and analysis principle of the overall geometric deviation of gear is discussed from many aspects,the elliptical spot error which has the greatest influence on the data acquisition accuracy in the process of laser measurement is optimized,the actual three-dimensional tooth surface function model of gear with general properties is derived from the measured data,and the measuring and visual expression principle of the overall geometric deviation of gear on the full tooth surface is explained.Finally,the correctness and feasibility of the measurement and visualization of the overall geometric deviation of the gear are verified by the measurement experiments of various types of gears.Based on the measurement and visual expression principle of the overall geometric deviation of gear,a laser measuring device for the overall geometric deviation of gear is developed.The structure principle of the measuring device is introduced in this paper.Based on this measuring device,the software for measuring,controlling and analyzing the overall geometric deviation of gear is developed using Visual Basic 6.0 and VPF software development platforms.It realizes automatic measurement and analysis of several integral geometric deviations on the full tooth surface of the gear.In addition,the software also innovatively developed the visual expression module of deviation,which can visualize the size and distribution of the overall geometric deviation on the gear surface clearly and intuitively.At the end of the paper,several types of gear with known precision parameters are measured and analyzed by the laser measuring device developed.The whole tooth profile deviation,total pitch deviation and helical angle deviation of the gear are measured and analyzed,and the results of the deviation are expressed on the gear surface by color mapping.Finally,through experimental verification,it can be seen that the non-contact laser measurement method,the optimization method of elliptical spot error in laser measurement,the measurement and analysis method of overall geometric deviation of gear and the visual expression method of deviation results proposed in the paper are correct and reasonable.This method effectively solves the main technical problems existing in current gear deviation measurement method,and can measure and analyze the overall gear geometric deviation more quickly,efficiently and accurately,laying a solid foundation for further research and development of gear laser measurement technology.