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

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