对无芯棒缩管提出了流函数的数学模型，应用上限原理加以推导和数值运算。
The paper forword a mathematical model of stream function for sinkings with no internal mandrel and applies the upper bound approach principle to make further deduction and calculation.
研制成功后的数控缩管机运行稳定，投入使用后收到了良好的经济效益和社会效益。
After the numerical control contracting pipe machine puts into use. It moves stable successfully, and it receives the good economic efficiency and the social be...
并通过一系列焊接工艺试验，确定采用管子内缩管板和高铬镍焊材及自动脉冲钨极氩弧焊方法，提高了管子管板的焊接质量和可靠性。
A series of welding process testing showed that using recessed tube-tube sheet, high Cr-Ni welding materials and automatic TIG welding technology could improve the welding quality of tube-tube...
在分娩后立刻使用缩宫素和麦角新碱（一种管控药物），可使严重产后出血的风险减少一半以上。
Use of oxytocin and ergometrine, a controlled medicine, immediately after the delivery of the baby reduces the risk of severe postpartum bleeding by more than half.
通过数值模拟和分析得出，较大的磁感应强度造成凝固界面前沿附近金属熔体重力倍数过低是在管坯中产生缩松的原因。
Through simulation and analysis, it is educed that the shrinkage in tube billet results from too low gravitation multiple near liquid-solid interfaces by intensive magnetic field.
在确定了管道的设计要求后，分析了分水缩径后的流速情况，明确了分水布置方式中支管缩径的技术状况。
After determination of the requirement for pipe design, the flow velocity of the manifold after reducing was analyzed, and the technology for branch reducing in layout of manifold was defined.
分析表明，支管缩径是可行的。
在含有大量生活垃圾形成的复杂软弱层中，按常规方法施工沉管桩，将造成严重的缩径现象。
In the complex soft layer contained large quantity of living rubbish, construction on sinking tubular pile with conventional method, will lead on to reduce tube diameter.
对管端扩、缩径半自动专机的设计基本思路、动作原理、液压系统进行了简要介绍。
The basic thought, the action principle and hydraulic system on half - automatic machine design for flaring and necking tube head are introduced briefly.
在薄壁管体的缩径旋压成形过程中，旋压工艺方法和旋轮的选择对缩旋成形有着重要作用。
During the reduction spinning process of thin thickness tube, the selection of spinning technique is important for spinning figuration.
分析了火焰管缩口的变形特点。
The deformation characteristic of the flame pipe necking was analyzed.
并分析了缩径率、缩径凹模半锥角、摩擦系数、缩径管坯初始壁厚对管端翘曲和轴向伸长率的影响规律。
In addition, this paper presents how the diameter reducing rate, the die semicone angle, the friction coefficient and the original wall thickness influence the buckling and the axial elongation rate.
本文阐述核反应堆用锆-4合金导向管缩径段的旋压成型工艺。
The forming technique by spinning for the necking parts of zircalloy-4 guide tubes for nuclear reactors is described.
采用了平面管的线性有限元数学模型和1：4.4缩比的简化管束模拟体。
A planar tube mathematical model of linear FEM (finite element method) and simplified model tube bundle on the scale of 1:4. 4 are used in the study.
主要介绍了箍缩聚焦二极管和自箍缩离子束二极管的研究进展。
The structure and principle of pinch reflex ion beam diode were introduced.
对管件电磁缩径的磁场力和动态变形进行了耦合场FEM数值模拟。
The magnetic forces and dynamic deformation analyses for tube-compression by electromagnetic forming are performed by coupled fields FEM numerical simulation.
热缩应力控制管适用于高压电缆附件起到应力控制的作用。
Heat shrinkable stress control tube applied to high-voltage cable accessory to make effect of stress control.
结合实际工艺，对铝合金薄壁管缩径旋压的缺陷进行分析，列出了缺陷的种类、产生原因以及预防措施。
Based on practical process, defection in aluminum tube neck-spinning is analyzed, and defection sort, cause and prevention method are listed.
确定了缩口次数并计算了管坯尺寸和缩口力。
The pipe blank dimensions and the necking force were calculated. The structure of necking die for the flame pipe was introduced.
热缩半导电管适用于高压电缆中起屏蔽用。
Heat shrinkable semi-conductive tube Applied to hig-voltage cable accessory to make effect of shield.
对于缩口系数小、变形前后壁厚比较大的薄壁管件的缩口成形，一般需多道工序来完成。
The shrink shape for thin tube with little shrink rate and bigger thickness difference in the distortion generally demands more working procedures.
加强型钢质热缩片管主要用于地形复杂、穿河过江、气候恶劣、防腐等级高的地区使用。
The reinforced type steel heat-shrinkable finned rube is mainly used in such places which have complicated topography, bad weather and high grade of anticorrosion, and cross the rivers.
其中该系统包括管一致性监控器，被配置为在熔缩阶段期间，通过监控从管中排出的流体来实现对管的结构一致性的监测。
The system also includes a tube integrity monitor configured to monitor structural integrity of the tube, during a collapsing phase, by monitoring fluid that is discharged from the tube.
DQ-0772宝优妮惠心衣帽架Y型主体设计，拥有外观专利与实用新型专利结构设计，缩口管连接，让顶部挂衣钩方向可以自由调节；
DQ-0772 Bonunion Huixin Coat Hat Rack Y-shaped body design, appearance patent and one structure patent for utility model, connected by necking pipe which makes top hook direction adjustable.
其结构特点是，它还包括缩扩管混合器和空压机输气管。
The conveyer device is structurally characterized by also comprising a contraction and expansion pipe mixer and an air compressor air duct.
热缩系列产品，是为市政工程排水、给水用双壁波纹管端口连接密封而设计的。
FRYS series heat-shrinkable sleeve products are designed for connection and sealing of ports of double-wall corrugated pipe for water discharge and supply of municipal engineering.
以6061t1(挤压态及退火态)铝合金为研究对象，探讨工艺参数对三维非轴对称管件缩径旋压成形的影响。
Investigating the tubes of 6061t1 aluminium treated by both the extrusion and anneal, the effects of forming parameters on neck-spinning process of 3d non-axisymmetric tubes are presented.
以6061t1(挤压态及退火态)铝合金为研究对象，探讨工艺参数对三维非轴对称管件缩径旋压成形的影响。
Investigating the tubes of 6061t1 aluminium treated by both the extrusion and anneal, the effects of forming parameters on neck-spinning process of 3d non-axisymmetric tubes are presented.
应用推荐