锻压技术

大长细比带凹底筒形件旋压成形方法研究

英文标题：Spinning method of large slenderness ratio cylinders with concave bottom

分类号：TG301

出版年,卷(期):页码：2016,41(12):67-71

摘要：

针对大长细比带凹底筒形件采用拼焊成形时工艺复杂、成形精度低、产品质量差等缺陷，提出采用普通旋压与强力旋压相结合的复合旋压成形方法来实现其完整制造，通过理论分析获得了复合旋压成形过程中变形量的分配原则。采用普旋圆弧形与强旋直线形相结合的旋轮轨迹，旋压成形筒形件的凹底部分，在旋压系数大于极限旋压系数的条件下拉深旋压获得筒形坯料，采用圆弧形及双锥面旋轮分别将屏蔽罩圆弧段及直筒段旋压减薄到规定尺寸等工序，成功加工出高精度的长细比为2.01的带凹底筒形件，同时生产效率提高了50%左右，为此类零件的制造提供了一种全新的方法。

For the defects of complex process, low forming precision and poor production quality during the drawing process of large slenderness ratio cylinders with concave bottom formed by tailor welded, the composite spinning method combined with the conventional spinning and power spinning was put forward, and the integral manufacturing of large slenderness ratio cylinders with concave bottom was realized. The deformation assignment principle of the composite spinning was obtained by the theoretical analysis, and the concave bottom was spun by spinning wheel locus combining circular-arc in the conventional spinning and straight line in the power spinning. Then, under the condition that the spinning coefficient was larger than the limit spinning coefficient, the blank was obtained by the drawing and spinning. Finally, circular-arc and straight in the shield were spun to thin a certain degree by circular-arc and double-tapered rollers respectively, and the qualified cylinders with the slenderness ratio of 2.01 and concave bottom was produced. At the same time, the production efficiency is increased over 50%. Thus, a new manufacture method of the large slenderness ratio cylinders with concave bottom is provided for industrial batch production.

基金项目：

基金项目:华南理工大学国家金属材料近净成形工程技术开发中心开放基金项目（2012001）

作者简介：肖刚锋（1987-），男，博士研究生 E-mail：xiaogangfeng1111@163.com 通讯作者：夏琴香（1964-），女，博士，教授，博士生导师 E-mail：meqxxia@scut.edu.cn

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