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Optimizacija procesnih parametrov za stabilizacijo in izboljšanje sposobnosti struženja
Mlinar, Andrej (Author), Kramar, Davorin (Mentor) More about this mentor... This link opens in a new window

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Abstract
Magistrska naloga obravnava proizvodni proces izdelka z ozkim tolerančnim območjem. V procesu izdelave se je pojavil problem nestabilnosti obdelovalnega procesa. Pred analizo obdelovalnega procesa smo najprej z metodo analize merilnega sistema preverili merilni proces. Po preverjanju ustreznosti merilnega procesa smo v nadaljevanju preverili obstoječi obdelovalni proces. Iz analize statistične kontrole procesa obstoječega stanja smo ugotovili, da je proces potrebno stabilizirati. Za stabilizacijo procesa in izboljšanja sposobnosti smo vgradili korekcijski sistem ter kasneje CNC stružnico še umerili. Stabilnost in sposobnost obdelovalnega procesa smo izboljšali, še vedno pa se je na izdelku pojavljal problem ovalnosti. Procesne parametre, ki bi lahko vplivali na ovalnost izdelka, smo analizirali z metodo načrtovanja eksperimentov. Z metodo smo ugotovili, da ima glavni vpliv vpenjalna sila. Dosežena minimalna vpenjalna sila še ni v celoti izključila problema ovalnosti, zato smo za izključitev le-tega predlagali nov način vpetja.

Language:Slovenian
Keywords:sposobnost procesa, analiza merilnega sistema, statistična kontrola procesa, ovalnost, načrtovanje eksperimentov, optimizacija
Work type:Master's thesis/paper (mb22)
Organization:FS - Faculty of Mechanical Engineering
Year:2017
Views:618
Downloads:471
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Secondary language

Language:English
Title:Optimization of the process parameters for stabilization and improvement of the turning capability
Abstract:
Master thesis deals with a manufacturing process of the product with narrow tolerances. A problem of the machining process instability arose during the process. A measurement system analysis of the measuring system and a control of the system’s adequacy were made before the analysis of the machining process. After the examination and approval of the measuring system capability, the analysis of the machining process continued. A statistical process control on the existent machining process was performed. Low process capability coefficients showed that the machining process was not stable and was incapable. In order to stabilize the process an automatic correction system was integrated, followed by improvement of the machine precision. The stability and capability of the machining process increased but the problem of the roundness on the product was still present. The possible process parameters, which could affect the roundness problem, were examined with the design of the experiment method. The results showed that the clamping force has the largest effect on the problem. The lowest clamping force was achieved with the parameters optimization, but the problem was still present. Therefor a new clamping fixture was suggested to eliminate the roundness problem.

Keywords:process capability, measurement system analyse, statistical process control, roundness, design of experiments, optimization

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