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Research on the Online Measuring and Quality Evaluating System for Large Complex Surface

Author: SunZhongLin
Tutor: LiBin；PengFangZuo
School: Huazhong University of Science and Technology
Course: Mechanical and Electronic Engineering
Keywords: Online measurement Quality assessment Large and complex surfaces Propeller blade Seven Five Axis
CLC: TG659
Type: Master's thesis
Year: 2007
Downloads: 203
Quote: 0
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Abstract


Large and complex curved-line measurement and quality assessment system is integrated probe CNC machine tools and dedicated software modules the workpiece blank measurement and allowance estimates, the quality of the workpiece online assessment system function. The topics to national \developed on the basis of the evaluation system based on seven five axis CNC system on-line measurement and quality. The main content of this paper is as follows: First, elaborated the principle of online measurement and quality assessment, large complex surface-line measurement and quality assessment system needs analysis, the overall design of the system. Then, in-depth study of the key technologies for online measurement and quality assessment, including: planning and surveying of the measuring point trajectory automatically generated. The establishment of bi-cubic B-spline propeller blade surface CAD models, according to the change of surface curvature the blank workpiece measuring points adaptive distribution planning, in accordance with the testing requirements of the work piece measuring point planning, and planning points interference judgment. Match the blade surface and the calculation of the allowance. Established using the method of least squares surface matching the objective function and solved using genetic algorithms. Propeller find round, leveling chucking process analysis, simplified solution. Propeller blade-line quality assessment. The formula derived propeller blade geometry parameters (pitch, leaf thickness, leaf width, caster angle, etc.). Propeller blade-line quality assessment is on-line measurement of the workpiece processing after assessing their quality, according to the measurement data. After analysis of seven five axis CNC system architecture, planning-line measurement and quality assessment software function modules, the choice based on the the embedded OpenGL Visual C software development platform to achieve the development of the system software, and complete systems integration. Finally, application development of in seven five axis CNC machine tools, CNC machine tools dedicated software probe the structure of large, complex curved-line measurement and quality assessment system integration and measurement of experimental results show that the developed system is simple and practical, improve the blade parts measurement and quality assessment of the efficiency and accuracy.

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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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