Transactions of Materials and Heat Treatment

Title：Experimental study of new precision blanking technology for thick-wall tubes

Authors： Zhao Renfeng Zhao Shengdun Jing Fei Li Jingxiang Guo Tong

Unit： Xi'an Jiaotong University

KeyWords： thick-wall tube precision blanking stress concentration control curves

ClassificationCode：TG316.1

year,vol(issue):pagenumber：2014,39(8):105-108

Abstract：

A new type of precision blanking method based on the fatigue fracture mechanism was proposed pointing to the problem of precision blanking of tubes. Experimental platform including precision blanking machine and control system was established. Using the radial cyclic loading and stress concentration effect of tube surface gap, precision blanking of tubes was achieved by changing the rotation speed of mould which was controlled by frequency converter to adjust the loading frequency of tubes at different blanking stages. Three materials of tubes which were 45 steel, 304 stainless steel and T2Y copper were tested by using different experimental control curves. The relative optimal frequency variety law and ideal control curve during blanking were got, as well as the cross section of tubes with good quality was obtained. Under the condition of ideal control curves the peak bump height and sunken height of 304 stainless steel tube cross section were just 0.08 and 0.05 mm, respectively. The experimental results show that the new type of precision blanking technology is feasible, and it can satisfy requirements for blanking of thick-walled tubes with various materials in the industrial production.

Funds：

国家自然科学基金资助项目（51175413）

赵仁峰（1983-），男，博士研究生

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