Transactions of Materials and Heat Treatment

Title：Numerical simulation of warm extruding precision forging technology of spur gears

Authors： QIU Ming-xia ZHANG Zhi-min ZHANG Bao-hong (Department of Materials Engineering North University of China Taiyuan Shanxi 030051 China)

Unit：

KeyWords： spur gears warm extruding precision forging technique numerical simulation

ClassificationCode：TG376

year,vol(issue):pagenumber：2005,30(3):53-55

Abstract：

In order to decrease precision forming force of spur gear, in this paper, the new warm extruding forming method has been brought forward on the base of the common closed-die forming method,which is the technology of 2 steps forging of spur gears utilizing radius direction leaded flow and constrained divided-flow method.3D elastic-plastic finite-element is used to simulate the forging process in detail.The effective stress distribution and the load-stroke curve of the whole process are got.The results of the simulation show that compared with closed-die forming, 2 steps forging can evidently decrease the forming force, improve metal flow , ensure completely filled gear teeth , meliorate the stress state of die and improve the quality of the formed spur gear.

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Reference：

[1]ChoiJC,ChoiY.Precisionforgingofspurgearswithinside relief[J].InternationalJournalofMachineTools&Manu facture,1999,39(10):15751588.
[2]OhgaK,KondoK,ResearchOnPrecisionDieForgingUtili zingDividedFlow(3rdReport,StudyonanOptimumCombi nationbyTwoStepMethodProposedanew[J].Bulletinof theJSME,1982,25:18431850.
[3]KondoK,OhgaK,Precisioncolddieforgingofaringgearby dividedflowmethod[J].InternationalJournalofMechanical Science.1995,35(8):11051113.
[4]SadeghiMH,DeanTA.Precisionforgingstraightandhelical spurgears[J].JournalofMaterialsProcessingTechnology,1994,45(14):2530.

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