双金属管衬拉复合拉拔力的计算

来源期刊：中国有色金属学报1998年第3期

论文作者：杨贵平 王智祥

文章页码：447 - 452

关键词：双金属管； 衬拉； 拉拔力； 工程法

Key words：bimetal tube； drawing with a fixed plug ； drawing loads ； slab method

摘    要：应用工程法对双金属管衬拉复合过程进行了分析，提出了双金属管衬拉时的三种流动模式及几何判据： (1) 当0≤β＜β₀时， 为复层变薄流动模式；(2) 当β₀＜β≤α时， 为芯层变薄流动模式； (3) 当β=β₀时， 为比例流动模式。推导出了双金属管衬拉拉拔力的计算公式。 结果表明， 理论计算值与实测值的相对误差约小于15%。

Abstract: It was analysed theoretically that the loads of bimetal tube drawing with a fixed plug by using slab method, and its three flow models and corresponding geometry criteria were proposed: (1) while 0≤β＜β₀, it is the model of the coating getting thinner;(2) while β₀＜β≤α, it is the model of the core getting thinner;(3) while β=β₀, it is the model of homogenous flow. A formula on loads for bimetal tube drawing with a fixed plug is derived, experimental results show that the relative errors between theorectical values and the measured ones are about less than 15%, which can meet the demands of engineering calculation.