采用工程法推导了冷拔内直筋管拔制力的计算公式。
The formula of drawing force for cold-drawn inner fin tube is derived with slab method in this paper.
利用上界法推导了冷拔内螺旋凸筋管拔制力计算式。
The formulas of drawing force for spiral internal-ribbed pipe cold-drawing are derived with upperbound method.
棒 拔制是冷拔钢管生产中应用最广泛的一种生产方法。
Non-mandrel drawing is a method widely used in cold drawn pipe production.
因而，该解析解可在工程上计算圆管辊拔拔制力时推广应用。
So the solution can be used to calculation of drawing force during draw-out by idle rolls.
数值计算结果给出了管材在不同的拔制阶段的应变与应力分布。
The distributions of the strain and the stress of the pipe are obtained by the numerical computation.
并将拔制力分为四个阶段：起始、初步接触、完全接触、稳定。
Based on the rules of drawing force, drawing process is divided into four stages: start, first contact, entire contact, stable.
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。
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.
本文介绍了一种结构独特，可显示拔制负荷的新型超长三线冷拔机。
A new over-long pipe cold drawing mill with three pipes drawn simultaneously, which has an unique structure and a display device for drawing load, is described.
介绍了辊模拔制异型钢管的特点，进行了辊模拔制和固定模拔制试验。
The paper deals with features of roll-die drawing of shaped steel tubes and experiments of roll-die drawing and fixed-die drawing.
残余应力的符号和大小在很大程度上取决于钢管在拔制工具中的初始变形率。
The magnitude and symbol of the residual stress greatly depends on the initial deformation rate of the pipe under drawing with the working tools.
研究了不同变形量、钢种、硬化程度、模角和拔制速度对空拔管直径缩小量的影响。
The effects of various amounts of deformation, steel grades, degrees of hardenability, die entry angle and drawing speeds on dia. sinking drawing are studied.
数值计算结果表明：材料曲线和强化规律均对拔制力和钢管的尺寸精度有重要的影响。
Numerical results have showed that both the models of material and the law of hardening have the important influences to the drawing forces and precision of the tube.
简要介绍了俄罗斯莫斯科钢管厂开发的短顶头和无顶头拔制碳素钢管的化学处理工艺。
The brief introduction concerns the chemical treatment process developed by Moskvosk steel tube Works, Russia for carbon steel tubes drawn with short-plug or non-plug process.
本文对冷拔机拔制小车的形式进行了探讨，并对各类小车的工作原理和用途作了分析和比较。
The paper discusses the categories of drawn-car of cold-drawn machines, their operating principle and utilization are also analysed and compared.
实验表明，理论计算值与实测值较吻合，可为冷拔内螺旋凸筋管的拔制设备选型提供理论依据。
The experiment result shows that the theoretical values are close to those measured, which provides a theoretical basis for internal-ribbed pipe cold-drawing equipment type selecting.
引起材料永久变形的机械操作，如弯曲、辗制、拔制等。在室温下操作，提高不锈钢的硬度及强度。
Any mechanical operation that creates permanent deformation, such as bending, rolling, drawing, etc. performed at room temperature that increases the hardness and strength of the stainless steel.
指出辊模拔制合金钢棒材比辊模拔丝更能发挥其优越性，并提出了辊模和固定模串联组合的新工艺。
It is pointed out that roller dies are more suitable for drawing alloy steel rods than for drawing wire and thread.
采用裂解制乙烯实验室评价装置，对兰州石化公司炼油厂催化裂化装置副产的丙烷、催化重整装置副产的拔头油进行了裂解性能评价实验。
The pyrolysis performance of byproduct propane in FCCU and byproduct reforming topped oil in catalytic reforming unit of Lanzhou Petrochemical Company were evaluated in the laboratory.
机适用于予制构件厂、线杆厂、小五金加工厂及建筑施工场地对盘条或冷拔钢筋的调直切断。
To apply to the local system component plants, poles plants, hardware processing plants and construction of the construction site or on-the-Cold-drawn steel straight cut.
在锤上模锻长杆类锻件时，常用滚挤和拔长工步进行制坯。
When long-rod type forgings drop-forged, fullering and edging are often selected as preform operations.
在锤上模锻长杆类锻件时，常用滚挤和拔长工步进行制坯。
When long-rod type forgings drop-forged, fullering and edging are often selected as preform operations.
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