Transactions of Materials and Heat Treatment

Title：Contrastive research of tube extrusion force deduced by the balanced work method

Authors： GUO Sheng-li~(1) BAI Pu-cun~(1) ZHANG Xiu-yun~(1) ZHU Bao-hui~(2) ZHANG Jian-jun~(1)(1.School of Materials Science and Engineering Inner Mongolia University of Technology Huhhot Neimonggu 010051 China 2.Ningxia Orient Tantalum Industry Co. Ltd. Shizuishan

Unit：

KeyWords： balanced work method cone die tube extrusion

ClassificationCode：TG376

year,vol(issue):pagenumber：2006,31(5):55-59

Abstract：

Extrusion is one type of the finishing processes in preparing the tube of the poor plastic metals and alloys that are difficultly deformed.Selecting extruders and checking strength of parts of them depend on the extrusion force.It is essential to calculate exactly the extrusion force for establishing reasonably regulations of production processes,designing implements and dies and so on.Therefore,it is very important to deduce the extrusion force's calculation formula that is of very high accuracy in the production processes.In the spherical and cylindrical coordinate systems,two types of theoretical calculation formulas of tube extrusion force about cone dies have been determined by the balanced work method in this paper.Through the producing experiment,these formulas are validated repeatedly.It is shown that calculation results using the two formulas are close to the experimental results and that average relative errors are about 6.6% and 9.6% respectively.However,the average relative error of results given by calculation formula,determined by means of block method in the concerned reference books is about 15%.It is concluded that the theoretical calculation formulas in the paper could be used in certain engineering fields.

Funds：

内蒙古自治区自然科学基金资助项目(2004008020707)

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