And reduction affects drawing temperature little and its increasing lowers drawing force.
变形程度对拉伸温度影响小，变形程度的增大使拉伸力下降。
The formula of drawing force for cold-drawn inner fin tube is derived with slab method in this paper.
采用工程法推导了冷拔内直筋管拔制力的计算公式。
The formula is therefore considered as available to the calculation of drawing force on tube sinking.
该计算式可用于圆管空拉拔制力计算。
The formulas of drawing force for spiral internal-ribbed pipe cold-drawing are derived with upperbound method.
利用上界法推导了冷拔内螺旋凸筋管拔制力计算式。
The thinning drawing force is calculated through deforming work method and slip-line method irrespectively, and the results are compared in this paper.
本文用变形功法和滑移线法分别求解变薄拉深力，并将两种方法的计算结果进行了比较。
Based on the rules of drawing force, drawing process is divided into four stages: start, first contact, entire contact, stable.
并将拔制力分为四个阶段：起始、初步接触、完全接触、稳定。
The drawing force decreases and the specific elongation increases when the frequency of pulse current exerting to wire adds in the scope of experiments.
在实验范围内，施加的脉冲电流频率增加时，拉拔力降低，合金丝的延伸率增加。
Through a series of drawing experiments of brass wires, the effects of ultrasonic vibration on drawing force and surface quality of the wires were discussed.
系统由超声波驱动器、换能器、变幅杆、拉丝模、拉伸机等组成，通过对黄铜丝的拉拔实验，考察了超声振动对拉拔力和丝的表面质量的影响。
The invention provides a pipeline connector which avoids reducing the pipeline flow, increases the drawing force and effectively solves the pipeline leakage.
本发明提供一种避免减少管路流量、增大拉拔力、有效解决管路泄漏的管道连接件。
Belt type drawing has applied imported deceleration motor and inverter, it has such advantages as reasonable structure, large drawing force, stable drawing, etc.
履带式牵引机采用进口减速电机及变频器，具有结构合理，牵引力大，牵引稳定等优点。
The said experiments show that with the roll-die drawing process the drawing force can be considerably reduced and surface quality of the shape steel tube improved.
试验证明，辊拔工艺可显著降低拔制力，提高异型钢管表面质量。
Based on analysis of the characteristics of steel pipe roller die drawing process, the analytical equation for the drawing force during roller die drawing operation is derived.
分析了钢管辊拔的特征，推导出辊拔时辊拔力的解析式。
The law that drawing force changes with drawing speed is analyzed. It is raised that increasing wire drawing speed can improve labour productivity, save energy and reduce consumption.
分析拉拔力随拉拔速度的变化规律，指出提高钢丝拉拔速度可提高劳动生产率和节能降耗。
Drawing force under free roller dies drawing is much smaller than that under fixed rolls drawing.
辊模拉拔辊拉力明显小于固定辊模拉拔。
Drawing force under free roller dies drawing is much smaller than that under fixed rolls drawing.
辊模拉拔辊拉力明显小于固定辊模拉拔。
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