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CNC Machine Thermal Error Compensation Technology

Author: WangXingWen
Tutor: ShenXingQuan
School: University of North
Course: Mechanical Manufacturing and Automation
Keywords: CNC Machining Center Thermal Error Detection Optimization of measurement points Modeling thermal compensation
CLC: TG659
Type: Master's thesis
Year: 2010
Downloads: 219
Quote: 0
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Abstract


CNC machine in the process, the various components due to the influence of the heat source of the frictional heat, the coolant and ambient temperature, etc., so that the temperature rise, resulting in thermal deformation between original relative the correct position in the tool and the workpiece, and ultimately makes destruction, thereby cause the workpiece thermal error, this error is to be the main source of error in precision and ultra-precision machining process. This article by the machine tool thermal error caused the establishment of a thermal error compensation model, targeted to design thermal error detection experiments, machine tool thermal error compensation method. Text to study CNC machine tool error compensation temperature sensor optimized layout, CNC machine tool error model for the main content; temperature sensor on the basis of analyzing the causes and mechanism of the thermal deformation of CNC machine tools, optimized layout theory fuzzy clustering analysis and multiple linear regression modeling theory; eventually established by multiple linear regression theory, experiment CNC machine tool thermal error compensation model. In this paper, a study from the following five aspects: (1) sets out the background and significance of the research projects, details the current situation of the domestic and international thermal error compensation technology, the focus of the study of this subject content. (2) thermal error, the main way to reduce the thermal error and thermal error compensation technology to do a brief description. Avoid the advantages and disadvantages of the method and error compensation method for thermal error compensation method error analysis, is determined by comparing the papers for thermal error compensation will be taken to the error compensation method; compared thermal error modeling approach, to determine the The papers will be using multiple linear regression method, compensation model. (3) study the key technologies: CNC machine tool thermal deformation temperature measurement point selection and thermal error modeling. The key point of fuzzy clustering analysis to find out the temperature measurement, introduced the theory of multiple linear regression, and the use of the theory of error modeling theory research. (4) analysis of the structural characteristics of the study three-axis vertical machining center as well as the heat source distribution, and thermal error space decomposition; proposed experimental program on this basis, to optimize the arrangement of the thermal error measurement points, using five point method for measuring the thermal deformation error. (5) using multiple linear regression theory, different measurement points, the establishment of a thermal error compensation model simultaneously multiple linear regression hypothesis testing and compensation indicator test, the machine tool thermal error compensation method.

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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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