锻压技术

中空气门毛坯的终锻过程研究

英文标题：Research on final forging process of the blank of hollow valve

作者：林喜佳章争荣莫东强吴秀敏

分类号：TG316.3

出版年,卷(期):页码：2015,40(11):13-18

摘要：

对中空气门楔横轧-模锻成形工艺中的终锻成形过程进行研究。根据管坯轧制成形和气门终锻工艺的要求，设计不同初始尺寸的中空气门毛坯，借助有限元软件Deform-2D对其在不同成形条件下的终锻过程进行模拟。模拟结果表明：终锻成形过程中毛坯头部金属主要沿径向流动并伴有少许轴向流动；金属轴向流动将使得毛坯头部材料减少，可能导致模具型腔充填不满，需要对头部进行适当的体积补偿；摩擦系数对杆部伸长量影响可以忽略。依据中空气门毛坯形状尺寸及成形条件的关系，获得了合理的毛坯形状尺寸，借助试验验证模拟结果的可靠性。试验结果表明，采用楔横轧-模锻工艺成形的中空气门产品具有良好内部流线，且组织性能高。

The final forging process of hollow valve in the cross wedge rolling plus forging was researched. According to requirement of tube rolling and final forging of valve, several kinds of hollow valve blanks with different initial dimensions for final forging were designed, and the final forging processes under different process conditions were simulated by Deform-2D. The results show that the metal in the blank head flows mainly along the radial direction with a little axis flow to reduce the material of the blank head resulted in underfilling of the cavity. So the head volume is need to be compensated appropriately, and the influence of friction coefficient on the elongation of the blank stem can be neglected. The reasonable blank shape and dimension are determined according to the relation between the dimension of hollow valve blank and deforming conditions. The reliability of the simulation results was proved by final forging experiments, and the experimental results show that the hollow valve produced by cross wedge rolling-forging process is of perfect inner flowing line and high organization performance.

基金项目：

广东省“扬帆计划”引进创新创业团队专项资助项目（201312G02）

林喜佳（1987-），男，硕士研究生

参考文献：

［1］胡学根.空心气门及其制造工艺[J].内燃机配件, 2002, (5):13-19.Hu X G. The hollow valve and manufacturing process[J]. Internal Combustion Engine Parts，2002，（5）：13-19.
［2］曲文强, 董兵, 聂元龙, 等. 盘端密闭中空充钠气门的制作方法: 中国专利, 201410249979.6[P]. 2014-06-06.Qu W Q, Dong B, Nie Y L, et al. The manufacture method of the airtight hollow infilling sodium valve: China patent, 201410249979.6[P]. 2014-06-06.
［3］林喜佳, 章争荣, 莫东强. 预成形毛坯过渡圆角半径对气门终锻成形过程的影响[J]. 锻压技术, 2015，40(3):12-17.Lin X J, Zhang Z R, Mo D Q. Influence of transition fillet radius of preformed blank on final forging of valve [J]. Forging & Stamping Technology, 2015, 40(3):12-17.
［4］王海江,夏巨谌,王新云,等.气门热挤压预成形和终锻成形过程模拟[J].锻压装备与制造技术,2006,41(3):50-52.Wang H J, Xia J C, Wang X Y, et al. Process numerical simulation on hot extrusion preforming and final forging of automobile valves [J]. Forming Equipment & Manufacturing Technology, 2006, 41(3): 50-52.
［5］Painter B, Shivpuri R, Altan T. Prediction of die wears during hot-extrusion of engine valves [J]. Journal of Materials Processing Technology, 1996, 59(1/2): 132-143.
［6］汪建敏,余凯飞,胡密,等. 空心轴类件楔横轧仿真及壁厚变化规律[J].热加工工艺, 2008, 37(23):73-77.Wang J M, Yu K F, Hu M, et al. Simulation of hollow shafts rolled by cross wedge rolling and regularity of wall thickness change[J].Hot Working Technology, 2008, 37(23):73-77.
［7］Ji H C, Liu J P, Wang B Y, et al. Numerical analysis and experiment on cross wedge rolling and forging for engine valves [J]. Journal of Materials Processing Technology, 2015, 221: 233-242.
［8］何巍巍, 张康生, 贾震, 等. 大断面收缩率一次楔入轧件心部缺陷的试验研究[J].锻压技术,2009, 34(2):27-30.He W W, Zhang K S, Jia Z, et al. Experimental study on internal defect of heavy section shrinkage workpiece under one cross wedge rolling[J]. Forging & Stamping Technology, 2009, 34(2):27-30.
［9］章争荣,黄丹娜,莫东强,等. 气门毛坯局部镦挤终锻成形工艺研究[J]. 锻压技术, 2009, 34(5):1-4.Zhang Z R, Huang D N, Mo D Q, et al. Research on local upsetting finish forging process of valve blank[J]. Forging & Stamping Technology, 2009，34(5):1-4.
［10］黄早文, 徐开东, 张志坤, 等. 管坯镦锻工艺仿真及优化[J]. 锻压技术, 2006, 31(6):9-12.Huang Z W, Xu K D, Zhang Z K, et al. Simulation and optimization of the upset forging process of tube parts[J]. Forging & Stamping Technology, 2006, 31(6):9-12.

服务与反馈：

【本网站尚未开通全文下载服务】【加入收藏】