Abstract: A new method of machining integral-fin tubes (IFT), chopping-extrusion technique, was presented. From the experimental observation, it was revealed that the processing of forming a unity of fins can be divided into three stages: chopping, extrusion and forming. It was shown by experimental results that there are four factors playing chief roles on processing of fin such as geometric parameters of cutting tool, depth of extrusion, feed and speed of chopping-extrusion. For a certain cutting tool, a limit feed was brought up with a definite extrusion depth under given chopping-extrusion speed. Only given proper parameters could continuous process of fin forming be carried out and the optimal shape of fins be obtained. Production costs will be reduced and productivity increased by employing this machining method because of easy performing and direct forming of fins.
Chopping-extrusion technique for making integral-fin tubes
Abstract:
A new method of machining integral fin tubes (IFT) , chopping extrusion technique, was presented. From the experimental observation, it was revealed that the processing of forming a unity of fins can be pided into three stages: chopping, extrusion and forming. It was shown by experimental results that there are four factors playing chief roles on processing of fin such as geometric parameters of cutting tool, depth of extrusion, feed and speed of chopping extrusion. For a certain cutting tool, a limit feed was brought up with a definite extrusion depth under given chopping extrusion speed. Only given proper parameters could continuous process of fin forming be carried out and the optimal shape of fins be obtained. Production costs will be reduced and productivity increased by employing this machining method because of easy performing and direct forming of fins. [