Effect of Welding Parameters on Pull-through Load in Projection Welding of M4 Nut to Hot Rolled Low Carbon Steel Sheet

Abstract

Projection welding is frequently used in automotive industry for its practicality in application and also help complex parts to be welded fast enough to reduce labour intensive processing. This study investigates the effect of parameters of projection welding on the weldability performance of dissimilar steels of hot rolled Low Carbon steel (WSS-M1A365-A22) sheet to M4 steel nuts in the projection welding operation. The aim of this study was to improve product quality by examining the fracture load within the minimum and maximum value range specified by the automotive industry. In this study, the effect of welding parameters on the quality of the projection weld of M4 weld nut on steel sheet was investigated using a 100 kVA projection welding machine with UNIS brand MFDC (Mid Frequency Direct Current) transformer. The samples underwent a tensile snap force test using a fully destructive testing device. The tests used a 3 mm WSS-M1A365-A22 steel sheet and M4 DIN 928 welding nut. The current value, welding time, and electrode compression force were varied to determine the optimal conditions. The results showed that a current value of 14.5 kA, welding time of 23 ms, and electrode compression force of 480 dAN met the pull-through load conditions.

Keywords

• Projection welding
• M4 weld nut
• WSS-M1A365-A22 steel sheet

M4 Somununun Sıcak Haddelenmiş Düşük Karbonlu Çelik Sac Üzerine Projeksiyon Kaynağında Kaynak Parametrelerinin Çekme Yükü Üzerindeki Etkisi

Abstract

Projeksiyon kaynak yöntemi, uygulama kolaylığı nedeniyle otomotiv endüstrisinde sıkça kullanılmaktadır ve karmaşık parçaların hızlı bir şekilde kaynaklanmasına olanak tanıyarak iş gücü yoğun işlemleri azaltmaya yardımcı olur. Bu çalışma, sıcak haddelenmiş Düşük Karbonlu çelik (WSS-M1A365-A22) sac ile M4 çelik somunların projeksiyon kaynak işlemi sırasında kaynaklanabilirlik performansı üzerindeki parametrelerin etkisini incelemektedir. Çalışmanın amacı, otomotiv endüstrisi tarafından belirtilen minimum ve maksimum değer aralığı içindeki kırılma yükünü inceleyerek ürün kalitesini artırmaktır. Bu çalışmada, M4 kaynak somununun çelik sac üzerine projeksiyon kaynağında kaynak parametrelerinin kalitesi üzerindeki etkisi, UNIS markalı MFDC (Orta Frekans Doğru Akım) transformatörlü 100 kVA projeksiyon kaynak makinesi kullanılarak araştırılmıştır. Örnekler, tamamen yıkıcı bir test cihazı kullanılarak çekme kopma kuvveti testine tabi tutulmuştur. Testlerde 3 mm WSS-M1A365-A22 çelik sac ve M4 DIN 928 kaynak somunu kullanılmıştır. Optimum koşulları belirlemek için akım değeri, kaynak süresi ve elektrot sıkıştırma kuvveti değiştirilmiştir. Sonuçlar, 14.5 kA akım değeri, 23 ms kaynak süresi ve 480 dAN elektrot sıkıştırma kuvvetinin çekme yükü koşullarını karşıladığını göstermiştir.

Keywords

• Projeksiyon kaynağı
• M4 kaynak somunu
• WSS-M1A365-A22 çelik sac

References

1. G. P. Chirinda, S. Matope, The lighter the better: weight reduction in the automotive industry and its impact on fuel consumption and climate change, Proceedings of the 2nd African International Conference on Industrial Engineering and Operations Management, Zimbabwe, 7-10 December, 2020.
2. A. Chebolu, Automotive lightweighting: a brief outline, In: A. Singh, N. Sharma, R. Agarwal, A. Agarwal, (eds), Advanced Combustion Techniques and Engine Technologies for the Automotive Sector. Energy, Environment, and Sustainability, Springer, Singapore, 2020.
3. G. Fontaras, N. G. Zacharof, B. Ciuffo, Fuel consumption and CO2 emissions from passenger cars in Europe – Laboratory versus real-world emissions, Progress in Energy and Combustion Science, 60: 97-131, 2017.
4. A. G. Toroslu, Compensation of springback for high strength steels by thickness reduction method, Journal of Polytechnic, 25(3): 1359-1368, 2022.
5. H. Oikawa, G. Murayama, T. Sakiyama, Y. Takahashi, and T. Ishikawa, Resistance spot weldability of high strength steel (HSS) sheets for Automobile, Nippon Steel Technical Report, 95(385): 39-45, 2006.
6. A. Gürsoy Özcan, V. Peşteli, O. Yöntem, Optimization of resistance spot welded on high strength steels with Taguchi method, Uludağ University Journal of The Faculty of Engineering, 23(2): 333-350, 2018.
7. H. Ada, C. Çetinkaya, A. Durgutlu, Radiographic and macrographic investigations of welding parameters determined by Taguchi method in API 5L X65 pipe joints, Journal of Polytechnic, 22(2): 375-384, 2019.
8. Y. Kaya, and N. Kahraman, The effect of welding parameters on weld nugget formation in titanium sheets at resistance spot welding, Journal of Polytechnic, 14(4): 263-270, 2011.

9. R. Ertan, Ö. Mutlusu, Investigation of the welding capability of aluminum and titanium alloy sheets with IF steel sheets by resistance spot welding method, Journal of Polytechnic, 23(4): 1003-1013, 2020.
10. X. Wang, Y. Zhang, Effects of welding procedures on resistance projection welding of nuts to sheets, ISIJ International, 57(12): 2194-2200, 2017.
11. H. Kır, M. Yazar, Ş. Talaş, Investigation on the effect of projection types on stud weld strength by Taguchi method, Journal of Polytechnic, 1-1, 2023.
12. S. Ramasamy, J. Gould, D. Workman, Design of experiments study to examine the effect of polarity on stud welding, Welding Journal, 81(2): 19-26, 2002.
13. S. Ha, S. P. Murugan, K. P. Marimuthu, Y. Park, H. Lee, Estimation of lobe curve with material strength in resistance projection welding, Journal of Materials Processing Technology, 263: 101-111, 2019.
14. H. Tang, W. Hou, S. Hu, Forging force in resistance spot welding, Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture, 216(7): 957-968, 2002.
15. C. V. Nielsen, W. Zhang, P. A. F. Martins, N. Bay, 3D numerical simulation of projection welding of square nuts to sheets, Journal of Materials Processing Technology, 215: 171–180, 2015.
16. E. Tolf, J. Hedegård, Resistance nut welding, Weldability to ultra-high strength steels and joint properties 59th Annual Assembly of IIW (International Institute of Welding), Quebec, Canada, 2006.
17. Z. Mikno, Projection welding of nuts involving the use of electromechanical and pneumatic electrode force, The International Journal of Advanced Manufacturing Technology, 99: 1405–1425, 2018.
18. S.C.A. Alfaro, J.E. Vargas, M.A. Wolff, L.O. Vilarinho, Comparison between AC and MF-DC resistance spot welding by using high speed filming, Journal of Achievements in Materials and Manufacturing Engineering, 24(1): 333-339, 2007.
19. Albaksan product catalogue, Albaksan Teknoloji Co., Bursa, 2022.
20. J.W. Ringsberg, P. Orvegren, H.F. Henrysson, G. Åkerström, Sheet metal fatigue near nuts welded to thin sheet structures, International Journal of Fatigue, 30(5): 877–887, 2008.
21. P. Sejč, J. Belanová, Z. Gábrišová, B. Vanko, The influence of parameters of the resistance projection welding of M10 steel nuts to the galvanized steel sheet DP 600 on selected joint characteristics, Manufacturing Technology, 20 (6): 822-833, 2020.
22. M. Jou, Experimental investigation of resistance spot welding for sheet metals used in automotive industry, JSME International Journal, Series C, 44(2): 544-552, 2001.