Transactions of Materials and Heat Treatment

Title：Cold extrusion-upsetting technology and design of the die for the multi-diameter shaft

Authors： LI Wen-feng1 LV Han-ying2 Gong Tao3(1.Department of Materials Science and Engineering Fujian University of Technology Fuzhou 350014 China 2.Laiwu Steel Group Machinery Manufacturing Co. Ltd. Laiwu 271104 China 3.Shandong Province Nonage Reeducation-throug

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KeyWords： multi-diameter shaft open-die cold extrusion close-die upsetting die structure

ClassificationCode：TG376.3;TG316

year,vol(issue):pagenumber：2007,32(3):61-63

Abstract：

Taking the shaft of automobile gearbox as an example,a multi-step cold-forging technology for manufacturing the multi-diameter shaft on ordinary hydraulic presses by adopting open-die cold extrusion and close-die upsetting was stated.The rule of determining parameters in forging drawings,blank preparation,step selection and equipment selection were discussed.The forging process drawing and the die assembly drawing were introduced.The die working process and die material were also introduced.The technology and die were proved through the practical production to be of high economical efficiency,which could be the references for developing the cold forging process of producing the similar products.

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Reference：

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