The Reseach Of Auto Camshaft Measurement

Engine is the heart of the automobile, the camshaft is the most importance part of the engine, So the machining precision of the camshaft directness influences the engine's capabilities, china had entered the automobile times, Engine performance and environmental(Euroⅲand Euroⅳstandard proposed) protection requirements become more stringent , With semi-automatic and fully automatic cam grinding machines and CNC grinding machine with the increasing popularity in China , Processing equipment is gradually able to meet the increasingly stringent requirements ,the problem is comes ,the measuring equipment got behind ,now asked better precision measuring instrument to control the machining equipment and working procedure.Chemical content or Physical hardness or length or and diameter and or so other parameters can use special equipment to get,the cam Raising and the peach angle are the most important parameters in a large number of parameters,them Impact engine valves open and close the gap size and The efficiency of engine valve,so The resulting decisions automobile noise, drive power and Exhaust emissions ,Camshaft measuring instrument is came into being at the request of special precision measuring instruments.Measurement with particularly precise measurement issues the benchmark unified , the particular question is the processing of baselines and benchmarks for measuring the unified, First settlement processing and measurement baseline unified,then carry out follow-up work,We combine the characteristics of the camshaft,using High-precision air bearing spindle, Solves the datum unified problem.This working Principle is angle encoder trigger Single Chip Micyoco to Acquisition Value of linear encoder,the data of cam profile through hardware filtering and digital filtering and Removal of singular value and elimination of eccentric and a series of mathematical operations , Analog out workpiece contours and compare with ideal profile ,To calculate error of Peach Raising and Roundness of part of the profile angle error, final judging the camshaft whether qualitied.Software design function to Modular , To facilitate future maintenance and adding new features ,User-friendly interface design,easy-to-accept and easy to operate,and can Offers a variety of formats of print reports, Screen display and print the report, do what you see is what you get. This process is designed using modular design,Divided into different modules according to the functions,Acquisition and control module, data processing, printing module, parameter setting module.This article is developed from the camshaft Measurer with the industry's latest theory,The ultimate precision of instrument with leading level in China,cam Peach Raising error≤±2 microns,Angle error≤±2′,roundness accuracy 0.5 microns,Realization of the automatic measurement and control,To achieve the "one-key" figure it out. And successful coumercialization,this instrument have better effect on improving production and Processing quality ,On the setting of adjustment and improvement of the processing technology has played a positive meaning.