Research On Geometrical Error Evaluation System And Key Technology Of Rotary Parts

In modern industry,aerospace,automobile and all kinds of precision engineering,the rotary parts represented by the precision shafting is an important part of mechanical products.In the process of production of this kind of parts,not only to ensure the accuracy of its size,it also has a high demand for its form and position accuracy.Cylindricity,roundness and straightness error are the most important precision indexes of precision shafting.They directly affect the matching properties of the parts and the positioning accuracy of the rotary surface,thus affect the rotation accuracy,vibration,noise,lubrication,seal and the service life of the whole machine.Therefore,to examine the geometric error,not only provides necessary information to guarantee the quality of mechanical products,but also provides a reliable basis for process analysis parts to improve product quality.In the early 80 s of last century,the standard of shape and position tolerance was promulgated and implemented.From then on,the measurement and evaluation of geometric error has been one of the focuses in the field of metrology.However,the development and key technologies based on the new generation of GPS of geometric error testing system for rotary parts are still lacking.Based on the existing hardware and software,this paper mainly studies the key technologies of geometric error measurement: according to the new generation of GPS standard system,the form and position error test operator is constructed.According to the requirement of precision and the measuring principle of the measuring instrument,and combining with the characteristic of the form and position tolerance,the different extraction schemes are studied,and the suitable extraction scheme is worked out.According to the data of the collection points,the filter algorithm is determined.In order to solve the problems of the slow speed of the existing algorithms,based on the research of various algorithms,the advantages and disadvantages of various algorithms are compared and analyzed,more rapid and accurate algorithm are introduced for the system,and fitting programming models are established.Analysis of the error evaluation procedures,we choose VB6.0 to programming,and using the original experimental data,the algorithm is verified byexperiments.This paper studies the structure of precision rotary table(Interface)and principle to formulate the scheme of data collection and processing,and combined with its characteristics,re-planning error evaluation module,making integration scheme,completed the data processing program,realizing the integrated measuring system and measuring instrument.This paper aims to study the key technology of the digital inspection and verification of the geometric characteristics of the product,and provide a set of test system for the geometric error measurement.This paper provides the software foundation and technical support for the research of the geometric error measurement system and the research of the on line geometric error evaluation.The technical and software results of this paper have a broad market prospect.It can be used as a supporting tool for the new generation of GPS standard,and also can be used as a basic tool.All the departments and enterprises involved in the design,manufacture and measurement of precision shaft systems are in urgent need of the necessary system.The application prospect is wide and the potential economic benefits are remarkable.