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The influence of friction time and contact angles in friction welding for Polyethylene pipes. |
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| รหัสดีโอไอ | |
| Creator | 1. Surachai Junchana 2. Chawalit Thinvongpituk |
| Title | The influence of friction time and contact angles in friction welding for Polyethylene pipes. |
| Publisher | Faculty of Engineering, Khon Kaen Univeristy |
| Publication Year | 2554 |
| Journal Title | KKU Engineering Journal |
| Journal Vol. | 38 |
| Journal No. | 3 |
| Page no. | 147-154 |
| Keyword | plastic welding, friction welding, HDPE |
| ISSN | 0125-8273 |
| Abstract | This paper is aimed to apply friction welding technique to weld HDPE pipes as well as to investigate the influence of friction time and contact angle to the property of joint. The welding machine was designed and manufactured in order to conduct the experiment under various welding conditions. HDPE tubes were used in this study and their outer diameter is 90 mm and 8.2 mm thick. The friction times were varied from 2, 3, 4, 5, 6,8 and 10 sec. While the contact angles were 0?, 45? and 90?. Other welding conditions were constant i.e. friction pressure (P1) 1 MPa, upset pressure 1 MPa, rotational speed 700 rpm and upset time 30 sec.The welded specimens were tested under tension, bending and pressure. The result suggested that as the friction time increases, tensile strength, bending strength as well as pressure resistance of tube are increasing. It was also observed that with the contact angle of 45? and 6 sec of friction time, the welded specimen has strength of 20.53 MPa which is about 15.86% higher than the master tube. In case of bending test, the tube with 45? contact angle provided highest value of bending resistance. However, it was observed that as the value of friction time increases, the resistance of bending tends to increase in similar pattern forevery contact angles. |
