Presented at the International Symposium on Multidisciplinary Studies and Innovative Technologies (ISMSIT2017), Tokat, Turkey, Dec 02, 2017

SETSCI Conference Proceedings, 2017, 1, Page (s): 207-213 , https://doi.org/

Published Date: 08 December 2017    | 1427     12

Friction stir spot welding (FSSW) method is prone to automation. In this way, by integrating the robot and automation systems have been easily developed. Thanks to the method, the effective overlapping joints can be obtained a short processing time. In the study, 4 mm thick polypropylene (PP) sheets were done lap joints with FSSW in the CNC machine. On the two different tool geometries were studied and the effect on weld joining strength of the tool geometry was examined. Welding process was applied with the aid of a written program using the ISO GM code system on the CNC vertical processing machine. In order to find the most optimum tool geometry, the welded samples were carried out the tensile tests according to TS EN 12814-2 standard. In this study, the maximum tensile force and the most optimum tool geometry have been determined as a result of tensile tests applied to the welded samples. The maximum tensile force with the Tool 2 has been achieved at the tool rotation speed of 1000 rpm, dwell time of 90 s, tool penetration depth of 5,75 mm. The maximum tensile force with Tool 2 was obtained as 4038 N for the welded joining. This value is equivalent to approximately 70% of the base material.  

Keywords - Friction Stir Spot Welding, Polypropylene, Tool Geometry, Joining Strength, Tensile Force, CNC Machine

[1] Ş. Mert, “Polipropilen malzemenin sürtünme karıştırma nokta kaynağı ile birleştirilmesi” Doktora Tezi, Kocaeli Üniversitesi Fen Bilimleri Enstitüsü, Kocaeli, 2010.

[2] Z. Feng, S. Diamond, M. L. Santella, T. Y. Pan, and N. Li, “High strength weight reduction materials-friction stir welding and processing of advanced materials”, Oak Ridge National Laboratory Report, DE-AC05-00OR22725, 101-108, 2004.

[3] Z. Feng, M. L. Santella, S. A. David, R. J. Steel, S. M. Packer, T. Pan, M. Kuo, and R. S. Bhatnagar, “Friction stir spot welding of advanced high-strength steels-a feasibility study”, SAE World Congress, Detroit, Michigan, USA, 11-14 April 2005.

[4] D. Mitlin, V. Radmilovic, T. Pan, J. Chean, Z. Feng, and M. L. Santella, “Structure properties relations in spot friction welded (also known as friction stir spot welded) 6111 aluminum”, Materials Science and Engineering, vol. 441, pp. 79-96, 2006.

[5] A. A. Arıcı ve Ş. Mert “Polipropilen malzemenin sürtünme karıştırma nokta kaynağı ile birleştirilmesi”, PAGEV Plastik Dergisi, 95, Sayfa 152-162, 2007.

[6] P. C. Lin, J. Pan, and T. Pan, “Failure modes and fatigue life estimations of spot friction welds in lap-shear specimens of 6111-T4 sheets. Part 1: Welds made by a concave tool”, International Journal of Fatigue, vol. 30, pp. 74-89, 2008.

[7] P. C. Lin, J. Pan, and T. Pan, “Failure modes and fatigue life estimations of spot friction welds in lap-shear specimens of 6111- T4 sheets. Part 2: Welds made by a flat tool”, International Journal of Fatigue, vol. 30, pp. 90-105, 2008.

[8] Ş. Mert ve A. A. Arıcı, “Friction stir spot welding method using in polypropylene sheet materials joining”, 12th International Materials Symposium, Pamukkale University, pp 1150-1156, Denizli, October 2008.

[9] V. X. Tran, J. Pan, and T. Pan, “Fatigue behavior of aluminum 5754-O and 6111-T4 spot friction welds in lap-shear specimens”, International Journal of Fatigue, vol. 30, pp. 2175-2190, 2008.

[10] V. X. Tran, J. Pan, and T. Pan, “Effects of processing time on strengths and failure modes of dissimilar spot friction welds between aluminum 5754-O and 7075-T6 sheets” Journal of Materials Processing Technology, vol. 209, pp. 3724-3739, 2009.

[11] Ş. Mert ve S. Mert, “Sürtünme karıştırma nokta kaynak yönteminin incelenmesi,” İleri Teknoloji Bilimleri Dergisi, Cilt 2, Sayı 1, Sayfa 26-35, 2013.

[12] Ş. Mert ve S. Mert, “Sürtünme karıştırma nokta kaynağı yönteminde kullanılan makine ve ekipmanların incelenmesi”, İleri Teknoloji Bilimleri Dergisi (Jurnal of Advanced Technology Sciences),Cilt 2, Sayı 3, Sayfa 121-129, 2013.

[13] Ş. Mert ve S. Mert, “Sürtünme Karıştırma Nokta Kaynak Yönteminin Otomotiv Sektöründeki Yeri”, Düzce Üniversitesi Bilim ve Teknoloji Dergisi, 3, Sayfa 432-438, 2015.

[14] M. Fujimoto, S. Koga, N. Abe, Y. S. Sato, and H. Kokawa, “Microstructural analysis of stir zone of Al alloy produced by friction stir spot welding”, Science and Technology of Welding and Joining, vol. 13, no. 7, pp. 663-670, 2008.

[15] Y. H. Yin, N. Sun, T. H. North, and S. S. Hu, “Hook formation and mechanical properties in AZ31 friction stir spot welds”, Journal of Materials Processing Technology, vol. 210 (14), pp. 2062-2070, 2010.

[16] M. I. Khan, M. L. Kuntz, P. Su, P. Su, A. Gerlich, T. North, and Y. Zhou, “Resistance and friction stir spot welding of DP600: a comparative study”, Science and Technology of Welding and Joining, vol. 12 (2), pp. 175-182, 2007.

[17] A. A. Arıcı and Ş. Mert, “Friction stir spot welding of polypropylene,” Journal of Reinforced Plastics and Composites, vol. 27 (18), pp. 2001-2004, 2008.

[18] Kawasaki Heavy Industries Ltd., “A new method for light alloy joining - friction spot joining - kawasaki robot”, Japan, www.kawasakirobot.com, visit date: 18 March 2006.

[19] J. Hinrichs, “Friction stir spot welding”, Friction Stir Link Inc., www.frictionstirlink.com, visit date: 21 March 2006.

[20] Ş. Mert and A. Arıcı, “Design of optimal joining for friction stir spot welding of polypropylene sheets”, Science and Technology of Welding and Joining, vol. 16(6), pp. 522-527, 2011.

[21] F. Yusof, Y. Miyashita, N. Seo, Y. Mutoh, and R. Moshwan, “Utilising friction spot joining for dissimilar joint between aluminium alloy (A5052) and polyethylene terephthalate”, Science and Technology of Welding and Joining, vol. 17, pp. 544-549, 2012.

[22] M. K. Bilici and A. I. Yukler, “Effects of welding parameters on friction stir spot welding of high density polyethylene sheets”, Materials and Design, vol. 33, pp. 545-550, 2012.

[23] M. K. Bilici and A. I. Yukler, “Influence of tool geometry and process parameters on macrostructure and static strength in friction stir spot welded polyethylene sheets”, Materials and Design, vol. 33, pp. 145-152, 2012.

[24] A. Mostafapour and F. T. Asad “Investigations on joining of Nylon 6 plates via novel method of heat assisted friction stir welding to find the optimum process parameters”, Science and Technology of Welding and Joining, vol. 21 (8), pp. 660-669, 2016.

[25] Y. Yan, Y. Shen, W. Zhang, and W. Guan, “Effects of friction stir spot welding parameters on morphology and mechanical property of modified cast nylon 6 joints produced by double-pin tool”, The International Journal of Advanced Manufacturing Technology, vol. 92, pp. 2511-2523, 2017.

[26] M. Awang, V. H. Mucino, Z. Feng, and S. David, “Thermomechanical modeling of friction stir spot welding (fssw) process: use of an explicit adaptive eshing scheme”, SAE International, 2005-01-1251, 2005.

[27] P. Su, A. Gerlich, and T. North, “Friction stir spot welding of aluminum and magnesium alloy sheets”, SAE International, 2005-01-1255, 2005.

[28] S. Lathabai, M. J. Painter, G. M. D. Cantin, and V. K. Tyagi, “Friction spot joining of an extruded Al-Mg-Si alloy”, Scripta Materialia, vol. 55 (10), pp. 899-902, 2006.

[29] A. Gerlich, P. Su, and T. H. North, “Tool penetration during friction stir spot welding of Al and Mg alloys”, Journal of Materials Science, vol. 40 (24), pp. 6473-6481, 2005.

[30] R. S. Mishra and Z. Y. Ma, “Friction stir welding and processing”, Materials Science and Engineering: R: Reports, vol. 50 (1), pp. 1-78, 2005.

[31] B. Çevik, “Polietilen levhaların sürtünme karıştırma nokta kaynağı ile birleşebilirliğine karıştırıcı takım dönme yönü ve karıştırma süresinin etkisi”, İleri Teknoloji Bilimleri Dergisi, Cilt 2, Sayı 3, Sayfa 28-33, 2013.

[32] M.K. Bilici, “Polietilenin sürtünme karıştırma nokta kaynak özellikleri”, Doktora Tezi, Marmara Üniversitesi Fen Bilimleri Enstitüsü, İstanbul, 2011.

[33] K. Kaptan, “Sürtünme karıştırma kaynağı birleştirmelerinde farklı karıştırıcı uç formlarının birleştirme kalitesine etkilerinin incelenmesi”, Yüksek Lisans Tezi, Gazi Üniversitesi Fen Bilimleri Enstitüsü, Ankara 2008.

[34] M. K. Bilici, A. İ. Yükler ve M. Kurtulmuş, “Yüksek yoğunluklu polietilen levhaların sürtünme karıştırma nokta kaynağında kaynak ucu geometrisinin kaynak mukavemetine etkisi”, Marmara Üniversitesi Fen Bilimleri Dergisi, Sayı 23(3), Sayfa 111-122, 2011.

[35] Ş. Mert ve E. Kaluç, “Sürtünme karıştırma kaynağında kullanılan takımlardaki gelişmeler”, Kaynak Teknolojisi VI. Ulusal Kongresi, Sayfa 103-115, 2003.

[36] H. Badarinarayan, Y. Shi, X. Li, and K. Okamoto, “Effect of tool geometry on hook formation and static strength of friction stir spot welded aluminum 5754-O sheets”, International Journal of Machine Tools and Manufacture, vol. 49 (11), pp. 814-823, 2009.

[37] H. Badarinarayan, Q. Yang, and S. Zhu, “Effect of tool geometry on static strength of friction stir spot-welded aluminum alloy”, International Journal of Machine Tools and Manufacture, vol. 49 (2), pp. 142-148, 2009.

[38] Y. Tozaki, Y. Uematsu, and K. Tokaji, “Effect of tool geometry on microstructure and static strength in friction stir spot welded aluminium alloys”,
nternational Journal of Machine Tools and Manufacture, vol. 47 (15), pp. 2230-2236, 2007.

[39] Catalog1 (2014), RÖCHLING Engineering Plastics Catalog, Polystone Thermoplastics Characteristics and Applications, Available: http://www.roechling.com/, visit date: 27 July 2014.