芯棒

One way is to use a hollow billet and then use a fixed or floating mandrel.

一种方法是使用空心坯，然后使用固定或浮动芯棒。

In this paper,cone-cylinder-mandrel forming and horizontal roll extruding technology for butt welding is reported.?

本文将锥度芯棒成型、平辊挤压技术用于高频对接焊工业试验中，成功地生产了？

Reinforce pipe technic has been widely studied, and most investigations used unidirectional stress field. The Reinforce technic is restricted on using the gyrate of core rod to increase hoop shear stress field, which is easy to cause extrusion instability and forming difficulty, and the production efficiency is far less than that of industry production.

国内外学者就管材的增强技术进行了大量的研究，大多的研究都是采用单方向的应力场进行的；增强技术仅停留在小尺寸口模管材的挤出或芯棒的转动来施加周向应力场，并且工艺上容易造成挤出的不稳定，以及定型的困难，生产效率与工业化相比相去极远。

The results show that dendritic segregation, banded segregation, liquation carbide and secondary carbide precipitated at the grain boundary or martensite lath are the main reasons causing the low impact toughness of H13 mandrel steel.

研究结果表明：枝晶偏析、带状偏析、液析碳化物及存在于晶界或马氏体边界的二次碳化物，是导致芯棒冲击韧性降低的主要原因。

It is shown by testing results that a bad rod resistant to stress corrosion can be promoted to an excellent rod thus reach even beyond the request of standard.

应力腐蚀测试结果表明，原耐应力腐蚀性能很差的芯棒可改变为能达到应力腐蚀标准的芯棒，且远远超过标准要求。

The effects of some parameters, such as mandrel ball numbers, mandrel extension length, bending angle, lubrication condition of pressure die, relative bending radius and material, on ovalization have been investigated by experimental method, and the effective methods to reduce the ovalization are proposed.

文章采用实验法，研究了芯头个数、芯棒伸出量、弯曲角度、压块润滑状态、相对弯曲半径、材料等因素对截面畸变的影响；并提出了减小截面畸变的有效措施。

Addressing the effect of mandrel moving speed and mandrel friction on continuous seamless tube rolling process,a three dimensional elastic-plasticity thermal-mechanical coupled simulation is conducted with a non-linear FE analysis software named MSC.

用非线性有限元分析软件MSC Marc/Superform对连轧管芯棒速度及其摩擦系数对轧制过程的影响进行了三维弹塑性热力耦合模拟仿真，得到了芯棒速度及其摩擦系数对轧制过程力能参数及变形参数间的影响规律。

With a 24-mandrels round configuration, it can reach a production speed of up to 150 pcs/min, but, to save costs in terms of toolings, it is possible to work with 12 mandrels only at half the speed.

具有24个芯棒的园盘结构，能够达到最大生产速度至150只/分。但是，如果要降低夹具的成本，也可以使用12个芯棒并具有一半的速度。

The extrusion stress can be predicted exactly and the geometric size of the die and the mandril can also be designed rationally with the theory of upper limit calculation.

本文提出一种有芯棒精密缩径开式挤压工艺，并应用上限理论计算方法可准确预示挤压力，合理设计出凹模及芯棒几何尺寸。

It is pointed out that the core brittle fracture is caused by extremely uneven voltage distribution along the insulator string and irregular designing and mounting of grading ring which leads to deformation of electric field on conductor end of insulator.It is proposed to replace the suspension clamp by a "八"shape joint strap and installing a glass insulator at this space or introducing a special composite insulator-gla...

通过对原线路双联悬垂复合绝缘子下垂式线夹挂点进行&八&字形改造；利用下垂式线夹缩短的距离在导线侧增挂玻璃绝缘子；新建线路采用特制复合绝缘子与玻璃绝缘子组合方式，使复合绝缘子均压环，接头连接处远离高压端，改善了复合绝缘子的电场分布，降低了复合绝缘子导线端承受的电压，消除了畸变电场，避免了棒形悬式复合绝缘子芯棒脆断，取得了良好的效果。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了