Transactions of Materials and Heat Treatment

Title：Research on stamping-forging hybrid forming process and influence factors for thickening tapered boss of hub of pulley

Authors： Gong Zitianzong Wang Lingli Qu Fang Xue Kemin

Unit： Hefei University of Technology Nantong Fuleda Auto Parts Co. Ltd.

KeyWords： hub of pulley thickening boss stamping-forging hybrid forming Deform-2D resistance wall

ClassificationCode：TG386

year,vol(issue):pagenumber：2014,39(5):40-45

Abstract：

According to the structure characteristic of hub of pulley with tapered boss, the stamping-forging hybrid forming process for thickening boss was studied. Two times upsetting processes were established. The FEM software Deform-2D was used to analyze the distribution of equivalent strain and forming load of tapered boss in pre-upsetting and post-upsetting processes. The influences of different lower fillet of die and resistance wall on forming results were researched. The results indicate that fold and fracture defects are prone to occur in the region of the pressure fillet of pad. Due to the maximal forming load which is only about 1000 kN, the press of low tonnage can be used for the upsetting processes. The forming result is qualified without fold defect when the value of the lower fillet radius R of die is 10 mm. The blocking effect is the best when the value of resistance bevel angle θ of wall is 45°. Finally, the qualified part was obtained by physical experiment，which proved the reliability of the forming process and parameters.

Funds：

安徽省自然科学基金资助项目（1308085JGD02）；南通市通州区510人才资助计划

巩子天纵（1988-），男，硕士研究生薛克敏（1963-），男，博士，教授，博导

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