| Detection of bobbin vibration range is one of the most important technology of spinning mills, the vibration process directly affects the bobbin quality and the service life of the spindle. Because the huge number of bobbin variety, manual inspection, inspection sampling and other traditional methods and can effectively complete the vibration process of bobbin. Based on this, this paper studies the bobbin vibration range automatic detection system to achieve rapid and efficient detection of bobbin. In this paper, through the analysis of technical requirements for the automatic detection of yarn vibration range, design scheme of the mechanical unit; and put forward the evaluation criteria for tube vibration range the main contents are as follows:First of all, more worktable design tube vibration range detection, and gives the positioning accuracy, that can meet the working table to detect various bobbin needed to drive the positioning accuracy is 0.017 degree; selection of globoidal indexing cam mechanism as the driving scheme of multi station, a detailed analysis of the kinematics parameters influence on the positioning, no the dimensionless displacement, velocity, acceleration, jerk and other specific changes through the process of sine motion alignment and modified sine motion law, the sine law is more suitable for automatic detection and vibration range of yarn; through ADAMS simulation and qualitative analysis of the motion. The simulation results show that the multi station processing time velocity and acceleration curve globoidal indexing cam is basically stable; by translocation to the localization of 0.015s and can not meet the accuracy requirements, so in the data The measuring point in the processing period of elimination, calculate the tube vibration range detection the maximum error is 2.51%.Secondly, the growth rate of the tangential belt transmission scheme design theory based on the spindle in a short period of time. Firstly, the influence of the speed change on the vibration range detection is analyzed. A cutting belt transmission mode is designed, through the analysis of the relationship between the elastic sliding, elastic sliding angle and the layout of the belt drive, the mathematical model of the tangential belt drive layout is established, and the optimal transmission parameters of multi axis transmission are determined by analyzing the influence of different parameters on the stability of the transmission system. The optimized package with spindle angle of 6.4297 degrees in the transmission process, and the belt length variation is 0.56mm.In the highest power spool vibration process detection dynamic angle is 4.37 degree, less than spindle wrap angle and elastic sliding rate of the maximum is only 0.06%, indicating that the spindle drive system can meet the requirements of the rotating speed of the spindle drive.Finally, based on the laser triangulation method to determine spool vibration range detection scheme, bobbin vibration research process in the detection of different sampling intervals in different sampling points, the final selection of a sampling interval of 1.5ms. To determine the tube vibration process evaluation standard, evaluation of the vibration process to process vibration mean and coefficient of variation of the joint. Through different rotation speed experiment to verify the two kinds of the rationality of the evaluation criteria; for the variation of the coefficient proposed two different data processing scheme, the average coefficient of variation of the evaluation method is more accurate, by 10 samples to analyze the changes in the more stable. Therefore, the as the method of the coefficient of variation of data processing; through the experiment to determine the four experimental bobbin vibration standards mean respectively 0.15mm,0.162mm,0.176mm and 0.221mm; and to determine the coefficient of variation of the standard values were 8.16% and 8.17%,8.42% and 9.39%. |
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