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Geometric Error Modeling and Measurement of Five-axis NC Machine Tools

Author: MengXiangYu
Tutor: WangXiaoMing
School: Dalian University of Technology
Course: Mechanical and Electronic Engineering
Keywords: 5 - axis CNC machine tools Geometric errors Error Modeling Error measurement Error Identification
CLC: TG659
Type: Master's thesis
Year: 2009
Downloads: 823
Quote: 4
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Abstract


In this paper, the geometric errors of five-axis CNC machine tools for the study, based on analysis of existing error modeling and error measurement research , the establishment of a five - axis CNC machine tool geometric error model to analyze the composition of the error term error model error measurement program design and error parameter identification and characteristics . CNC machine tools at home and abroad error modeling and error measurement technology research status, comparing the advantages and disadvantages of the various error modeling methods and error measurement method . And describes the error sources and types of CNC machine tools , focusing on the causes and composition of geometric errors . Feature definition describes the characteristics of the relationship between the two adjacent moving body , the body coordinate system and motion between the adjacent reference coordinate system , the error case between two adjacent features transformation matrix and feature matrix classified . Error modeling method , summarized the error modeling steps . Type of CNC machine tools , and highlights the type of 5 - axis CNC machine tools . CNC machine axis defined method . Analysis of geometric errors of five-axis CNC machine tools , machine topology , the machine two error branch , established a five-axis CNC machine tool geometric error model , and CNC machine tool order error model expression analysis the error term in the model . Individual error data fitting method . By observing the composition and characteristics of the error term error model , the design parameters of the the error measurement program identification error . In this paper, a mathematical error parameter identification , reducing the number of error parameter identification , simplifying the error parameter identification process and improve efficiency . Machine error model in the mathematical expression of the error term is derived based on the measurement program . The instance of the error parameter identification error measurement program design . By DX , dY , and dZ entry error measurement value to identify the error parameter values ??in the error model describes the the error measurement program designed in this paper can be used to solve the error parameters .

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CLC: > Industrial Technology > Metallurgy and Metal Craft > Metal cutting and machine tools > Program control machine tools, CNC machine tools and machining
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