Talaşlı imalat esnasında parçalara yüklenen artık gerilmelerin ısıl işlem sonrası etkilerinin araştırılması Investigation of the effects of residual stresses applied on parts at machining after heat treatment
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Tarih
2006
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info:eu-repo/semantics/openAccess
Özet
Bu çalışmada, talaşlı imalat sırasında çelik parçalara yüklenen artık gerilmelerin ısıl işlem sırasındaki boyutsal değişime etkileri araştırılmıştır. İmalat sektöründe, ısıl işlem sonrası yapılan prosesler pahalı olduğundan ısıl işlem prosesi önemlidir. Çalışmalarımda direksiyonun önemli parçalarından olan sektör mili ve piston'un talaşlı imalat prosesleri incelenmiştir. Dövme prosesinden itibaren parçaların prosesleri izlenmiştir. Talaşlı imalat sonrası boyutsal ölçümler yapılarak ısıl işlem sonrası ölçümleri ile karşılaştırılmıştır. Aynı çalışma finiş tornalamaya 0,5 mm paso bırakılarak gerilme gidermeye tabi tutulmuş ölçümler tekrarlanmıştır. Artık gerilmelerin kaçınılmaz olduğu talaşlı imalatta, ön gerilme giderme uygulayarak parçanın gerilmeleri alınmaya çalışılmıştır. Bu çalışmaya paralel olarak sektör milinde alternatif dövme yöntemi üzerinde çalışılmıştır. Bu şekilde talaş payı azaltılarak yüklenen artık gerilme miktarının da düştüğü gözlenmiştir.
In this study,impact on dimentional variation of residual stress, which applied onto steel component during the heat treatment, were researched. Due to cost of process after heat treatment,heat treatment process occupy a very important place in the manufacturing industry. In my study,steering sytems important element's sector pivot's and piston's machining process were observed. From forging process,every process that applied to our experimental part also were observed. Dimentional measurement of after- machining process has been done and these measurements were compared to Dimentional measurement of after-heat trearment process. The same work has been done for the part which was exposed stress relieving and 0.5 mm depht has being left for the end lathing ,and measuring were repeated. Because of the residual stress's are unavoidable in machining process, through the advance-stress relieving, the tension's of the part were tried to be reduced. Running paralell to this study,alternative forging method has been applied to sector pivot. Using that method, it was observed that the amount of residual stress has been lowered by reducing the margin of the machining depth on the component.
In this study,impact on dimentional variation of residual stress, which applied onto steel component during the heat treatment, were researched. Due to cost of process after heat treatment,heat treatment process occupy a very important place in the manufacturing industry. In my study,steering sytems important element's sector pivot's and piston's machining process were observed. From forging process,every process that applied to our experimental part also were observed. Dimentional measurement of after- machining process has been done and these measurements were compared to Dimentional measurement of after-heat trearment process. The same work has been done for the part which was exposed stress relieving and 0.5 mm depht has being left for the end lathing ,and measuring were repeated. Because of the residual stress's are unavoidable in machining process, through the advance-stress relieving, the tension's of the part were tried to be reduced. Running paralell to this study,alternative forging method has been applied to sector pivot. Using that method, it was observed that the amount of residual stress has been lowered by reducing the margin of the machining depth on the component.
Açıklama
Anahtar Kelimeler
Makine Mühendisliği, Mechanical Engineering
