The Research Report In The Coupler Knuckle Measuring Machine Designing Prophase

The coupler knuckle as the key part to realize to hang the trains and pass the traction,whose quality and performance does have an great influence on the connection performance and security of the railway vehicles.So the test of all aspects of the performance of the coupler knuckle must be carried out before installing, especially the detection of the shape size. At present, the detection of the size of coupler knuckle is using the template method.It causes Intensity of labor, inefficiency and strong randomness, which lays hidden danger to the railway transportation safety. So about the detection of a certain type of coupler knuckle puts forward higher requirements, which needs to design a special measuring machine for coupler knuckle.At first, research the existing various typical curved surface measuring machine on the market, study the performance, on the basis of mastering its working principle,through the comparative analysis, determine the Contact cartesian coordinate measuring way as the plan of the measuring machine for coupler knuckle. Providing direction and basis for the subsequent design research.Then Combining with clasps lingual structure and surface testing requirements,through research, give the whole design plan that the host structure of measuring machine adopts horizontal cantilever, trigger type contact probe system, PLC + positioning module and a half closed loop control system and self-programmatic measurement software.After that, to study in other parts of the host structure design first, concluding the design of the positioning clamping mechanism and Rotary table.using AutoCAD and PRO\E to finish all the parts of 2 d assembly drawing and part drawing and 3 d structure,then,Study to determine the probe radius compensation algorithm for two-dimensional radius compensation method,plan the mining point of strategy planning of measuring software,and determine the point to point measurement and its measuring the parameters of the arc radius circle fitting least-square algorithm.This paper will give a certain kind of coupler knuckle or similar subsequent coupler knuckle work piece measuring machine design provides a certain reference value.The successful design of the measuring machine of the coupler knuckle Will fill the coupler knuckle surface dedicated test automation of localization of blank,promoting the domestic testing technology of the coupler knuckle of rapid development of railway vehicle ay a solid foundation ofr the high degree of reliability for the future, the machining accuracy high overload coupling walking to the international market.