【摘 要】
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The formation mechanism of bulge on the works surface during the extrusion process was analyzed. The bulges size and the reasons for abscission were studied. Th
【机 构】
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College of Mechanical Engineering
论文部分内容阅读
The formation mechanism of bulge on the works surface during the extrusion process was analyzed. The bulges size and the reasons for abscission were studied. The results show that the abscission of bulge from works is resulted from the integrated actions of pressure and friction between the plough tool and works. During the extrusion-plough process, it is noticed that four kinds of fins are appeared, which are gestation fin, multi-dimensional fin, tumor and overlap fin, when using different machining parameters. And multi-dimensional fin which has high heat transmission efficiency is a kind of complicated fin with cockscomb-like 3D substructure fin on the tip of 3D macrostructure fin. Based on the studies of those four kinds of fins, the conditions of their formation are concluded, as well as the formation mechanism is obtained.
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