Transactions of Materials and Heat Treatment

Title：Forming technology of small deep cone hole in thickwall tube and prediction of technological size

Authors： Tianjin University Zhou LihuaLi ShuangyiZhang Zhenchun

Unit：

KeyWords： Thickwall tubeSmall deep cone holeFlow functionForming technologyTechnological sizePredliction

ClassificationCode：TG376

year,vol(issue):pagenumber：1999,24(3):0-0

Abstract：

By means of flow function model of upper bound method,an ideal model for extrusion in ordinary thickwall tube is founded,followed by qualitative analysis of the forming principles of ordinary thick-wall tube.Then,based on experimental research,the forming technology of small deep cone hole in thickwall tube and prediction of the technological size are studied.The ideal model for open type extrusion in ordinary thickwall tube is modified.

Funds：

Reference：

1李天基．小孔加工．北京：机械工业出版社，1988．2周立华．厚壁管件上小尺寸深锥孔的成形加工及工艺尺寸的预测．天津大学硕士论文，1993．3李双义．极值原理及应用．天津大学教材科，1982．4张振纯，李双义等．用流函数的上限模式预测无芯棒缩管时的工艺参数．天津大学学报，1991年特刊：59～63．5V．Nagpal．AnalysisofPlaneStrainExtrusionThroughArbitrari－lyShapedDiesUsingFlowFunction．JournalofEngineeringforIndustryASME，August，197

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