PROJEKSİYON KAYNAĞIN PROSES PARAMETRELERİNİN S355MC KLEVİS BRAKETİN BAĞLANTI PERFORMANSINA ETKİSİ

Öz

Bu çalışma kapsamında, otomotiv sektöründe kullanılan amortisörün bağlantı ekipmanlarından biri olan klevis braketin üretiminde rol oynayan projeksiyon kaynak prosesinin iyileştirilmesi ve projeksiyon kaynak parametrelerinin klevis braketin mekanik performansını nasıl etkilediği araştırılmıştır. Bu kapsamda, 9 farklı proses kullanılarak numuneler üretilmiş ve bu numunelerin kopma testleri yapılmış ve elde edilen sonuçlara göre ANOVA analizi uygulanmıştır. Analiz sonucunda, en etkili parametrenin %80 oranında kaynak basıncı olduğu ve kaynak sıkma süresinin etkisinin ihmal edilebilecek düzeyde olduğu belirlenmiştir. Ayrıca, projeksiyon kaynağıyla yapılan 5 farklı noktanın en kritik 2 noktasının kesitlerinin makro ve mikro yapısı incelenmiştir. Kaynak süresinin artmasıyla birlikte ısıl girdinin arttığı ve bunun sonucunda mikro yapıdaki ısı tesirli alanların ve füzyon bölgesinin boyutlarının arttığı gözlemlenmiştir. Bununla birlikte, kaynak basıncının artması mikro yapıyı olumsuz yönde etkilemiştir. Ayrıca, kaynak kesitlerinin ortalama sertlik değerlerinin, bu mikro yapıdaki değişimden etkilendiği gözlenmiştir.

Anahtar Kelimeler

• Projeksiyon Kaynak
• Optimizasyon
• Çekme-Kayma Testi
• Mikroyapı
• Sertlik

Effect of Projection Welding Process Parameters on the Joining Performance of S355MC Klevis Brackets

Öz

In this study, the improvement of the projection welding process was looked into. The projection welding process is used to make the clevis bracket, which is a piece of equipment used in the automotive industry to connect shock absorbers. The study also looked into how the parameters of the projection welding process affect the mechanical performance of the clevis bracket. In this context, samples were produced using nine different processes, rupture tests of these samples were made, and ANOVA analysis was applied according to the results obtained. As a result of the analysis, it was determined that the most influential parameter was 80% welding pressure, and the effect of welding tightening time was negligible. In addition, the macro- and micro-structures of the sections of the two most critical points of five different points made with projection welding were examined. It was observed that the thermal input increased with the welding time, and as a result, the dimensions of the heat-affected zone and fusion zone in the microstructure increased. However, the increase in welding pressure negatively affected the microstructure. In addition, it was observed that the average hardness values of the weld sections were affected by the change in this microstructure.

Anahtar Kelimeler

• Projection Welding
• Optimization
• Break Test
• Microstructure
• Hardness

Kaynakça

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