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Research on Simulation Technology in Optimization Machining Process of Thin-walled Parts

Author: ChenHua
Tutor: ChenWeiFang
School: Nanjing University of Aeronautics and Astronautics
Course: Mechanical and Electronic Engineering
Keywords: Thin-walled parts Finite Element Clamping optimization Deformation Prediction Cutting Parameter Optimization Path compensation optimization
CLC: V261.2
Type: Master's thesis
Year: 2008
Downloads: 374
Quote: 2
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Abstract


Aeronautical thin member complex structure, the difference in rigidity and easy to produce processing deformation, it is difficult to guarantee a higher machining accuracy of the workpiece under the clamping force and the cutting forces. Thus, based on the low-stiffness parts, using the finite element simulation method to study the process of thin-walled parts optimization techniques, improve processing accuracy has important theoretical significance and practical value. Thin-walled parts to small and medium-sized aviation, simulation analysis and experimental research method of combining and processing accuracy from different optimization point of view, including clamping thin-walled parts in the process optimization, optimization of cutting parameters The path compensation optimization methods, specific research work are as follows: optimization of small and medium-sized clamping scheme of thin-walled parts. Clamping to minimize the critical surface shape and position errors caused by the deformation of the clamping of the objective function optimization mathematical model to analyze the clamping scheme based on the finite element analysis software (ABAQUS) to optimize processes and key issues, based on the optimization model and optimization The process to complete the optimization of clamping scheme. Clamping optimized on the basis of cutting parameters optimized processing of thin-walled parts. The milling distortion of thin-walled pieces layered predict the dynamic model, analyze and compare the size of the deformation of the workpiece under different cutting conditions and the trend on this basis, the combination of the genetic algorithm and finite element simulation method to optimize the thin during processing of the wall member of the cutting parameters. To further reduce processing errors, clamping optimization and optimization of cutting parameters on the basis of the path compensation optimization of thin-walled parts. Completely compensated based on the principle of the path compensation and optimize compensation the two paths compensation method and establish a path compensation optimization model, analyze and compare the before and after compensation processing error. The test machining, comparison with finite element simulation results verify the correctness and validity of the finite element analysis model and the optimization model. Rapid optimization process, on the basis of in-depth study of the ABAQUS secondary development method, the completion of the development of the rapid simulation platform for process optimization platform integrated clamping optimization, machining deformation prediction and optimization of cutting parameters and active path compensation and optimization, parametric analysis computing provides a user-friendly interface.

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CLC: > Aviation, aerospace > Aviation > Aeronautical Manufacturing Technology > Manufacturing process and equipment > Cold
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