Friction stir welding of thermoplastics using a newly designed tool
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- 作者：Mehdi Pirizadeh ; Taher Azdast ; Samr ; Rash Ahmadi ; Sajjad Mamaghani Shishavan ; Arvin Bagheri
- 刊名：Materials and Design
- 出版年：February, 2014
- 年：2014
- 卷：54
- 期：Complete
- 页码：342-347
- 全文大小：1129 K
文摘
Although friction stir welding (FSW) is a recent addition to plastics joining technology, it has been shown to have many benefits over traditional welding, particularly in terms of joint quality. In FSW of thermoplastics, traditional tools usually form a slit on the backside of the welded specimens. Therefore, a serious problem named 鈥渞oot defect鈥?occurred and leads to a poor tensile strength of the workpiece. In this paper, a newly designed tool with two shoulders, touches upper and beneath surface of the workpiece has been used in order to weld acrylonitrile butadiene styrene (ABS) sheets. The new tool named, 鈥渟elf-reacting tool鈥? successfully eliminated back slit of the welded parts. Moreover Shape of the pin (simple and convex), rotational speed and translational speed are used in experimentations as the variable parameters affecting mechanical properties. Tensile strength is considered as the mechanical property of welded parts in this research. Obtained results show that pin shape has the greatest effect on tensile strength of welded parts.