hollow billet

The influence of commercial frequency electromagnetic field on the surface quality, mechanical properties and macrostructure of copper hollow billet prepared by horizontal continuous casting method was investigated.

研究了工频电磁场对水平连铸紫铜管坯表面质量、力学性能和组织的影响。

ANSYS software is used to compute the influence of rotate magnetic filed on the solidification of clad hollow billet.

采用ANSYS软件模拟旋转磁场对管坯凝固过程的影响。

How to produce high quality large-diameter hollow billet to satisfy the requirements of succeeding treatment is the key to acquire the high quality large-diameter hollow tube.

如何生产优质的大口径管坯，使其满足后续加工要求，是获得高质量大口径管材的技术关键。

Study on soft-contact electromagnetic continuous casting of hollow billet

空心管坯软接触电磁连铸技术研究

By mandrel reaming method, hollow billet thickness is reduced to the certain thickness of cylindrical forging, then after longitudinal split and flattening process, flat forging with the ideal size is completed.

该方法首先将空心铸坯芯轴扩孔至具有一定厚度的圆筒锻件，然后对其进行纵向剖切，再经过展平等工序得到所需尺寸的成品件。

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.

The unit pressure in backward extruding hollow billet has been calculated by the slip line method and the upper bound method.

本文对空心件反挤的单位挤压力，采用滑移线法和上限法进行了计算。

Forming force during backward extrusion of hollow billet was analyzed by slab method and numerical simulation.

采用主应力法与数值模拟相结合的方法，研究分析空心坯料反挤压成形力变化规律。