Transactions of Materials and Heat Treatment

Title：Analysis on influencing factors of extrusion quality for traveling wave tube parts

Authors： Chu Hongyan Jiang Siyu Cheng Qiang Zhao Kailin

Unit： Beijing Key Laboratory of Advanced Manufacturing Technology Beijing University of Technology

KeyWords： cold extrusion traveling wave tube friction coefficient pressure holding time orthogonal experiment

ClassificationCode：TG376.3

year,vol(issue):pagenumber：2020,45(3):55-61

Abstract：

The traveling wave tube (TWT) part processed by milling in an electronic industry has complex processing shape, small size, high requirements of form and position tolerances, large processing difficulty and high production cost. Based on the above requirements and problems, two kinds of cold extrusion schemes were designed, and the forming process was simulated by software Deform. According to the simulation results, the die with around constraints was used, and the influences of loading speed for upper die, friction coefficient and pressure holding time on the final product quality were analyzed. Finally, taking the relative deviation of dimensions as the evaluation index, the optimized technological parameters of extrusion for TWT parts were obtained by the orthogonal experiment with the loading speed of upper die of 60 mm·s-1, the friction coefficient of 0.08, and the pressure holding time of 3 min. Based on these parameters, experiments were conducted, and the traveling wave tube part with good forming effect was obtained. The research results have certain guiding significance for the process improvement of similar products in production.

Funds：

北京市科技计划项目(Z181100003118001)

初红艳（1972-），女，博士，副教授 E-mail：chuhongyan@bjut.edu.cn 通讯作者：姜思宇（1994-），男，硕士研究生 E-mail：S201701703@emails.bjut.edu.cn

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