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1	Robotické obrábění s využitím externího nástroje / Robotic machining with external tool Ryvol, David January 2019 (has links) The goal of this final thesis is to evaluate the performance of chosen CAM software in robotic deburring of cast parts while using external tool. For this purpose, an analysis of program’s functions was carried out and toolpath-making strategies were compared. The most appropriate strategy for mentioned technology was chosen based on this analysis. The generation of a toolpath was described on the example of real part from automotive industry. In order to simulate real machining process, a model of workspace was created, proper tool with spindle was selected and a method of clamping the workpiece was designed. A postprocessor was created, and so was the robot program, after successful simulation, as a foundation for possible practical test. PowerMill software proved to be not very suitable for this kind of machining application, mainly because of high amount of time consumed during the whole process. So the original idea of replacing classical on-line programming with this software is not advised.
2	Prediction and minimization of excessive distortions and residual stresses in compliant assembled structures Yoshizato, Anderson 26 May 2020 (has links) The procedure of joining flexible or nonrigid parts using applied loads is called compliant assembly, and it is widely used in automotive, aerospace, electronics, and appliance manufacturing. Uncontrolled assembly processes may produce geometric errors that can exceed design tolerances and induce an increment of elastic energy in the structure due to the accumulation of internal stresses. This condition might create unexpected deformations and residual stress distributions across the structure that compromise product functionality. This thesis presents a method based on nonlinear Finite Element Analysis (FEA), metamodelling, and optimization techniques to provide accurate and on-time shimming strategies to support the definition of optimum assembly strategies. An example of the method on a typical aerospace wing box structure is demonstrated in the present study. The delivered outputs intend to support the production line by anticipating the response of the structure under a specific assembly condition and presenting alternative assembly strategies that can be applied to address eventual predicted issues on product requirements. / Graduate Compliant Assembly Assembly Simulation Residual Stress Assembly Distortions Assembly Deformation Assembly Distortions Wing Finite Element Analysis Assembly FEA Assembly FEM Assembly Assembled Structures Assembly Optimization Assembly Metamodelling Assembly Surrogate Model Shimming Assembly Shims Assembly Simulation of Manufacturing Process Tolerance allocation Tolerance Analysis

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Robotické obrábění s využitím externího nástroje / Robotic machining with external tool

Prediction and minimization of excessive distortions and residual stresses in compliant assembled structures