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.
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.
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.
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.
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.
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.
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.
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.
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