孔型修改后，钢管壁厚精度降低，力能参数有所升高。
After rolled in changed groove, wall thickness uniformity decreases, and rolling pressure and electric current increase.
试件参数包括钢管壁厚、混凝土强度、剪跨比和轴压比。
Wall thickness of steel tube, concrete strength, shear-span ratio and axial force ratio were considered as test parameters.
建立工艺过程自动控制系统提高周期轧管机轧制的钢管壁厚精度。
Wall-thickness accuracy of steel tubes rolled on a pilger mill can be improved with the automatic process control system established.
结果表明，钢管壁厚和运动速率是影响钢管温升和径向温差的主要因素。
With the analysis of the model, it was shown that the considerable factors are tube thickness and furnace rate.
阐述了穿孔毛管产生同管壁厚差的原因，研究了穿孔和轧管工艺对钢管同管壁厚差的影响。
The causes producing wall thickness difference in a same pierced shell are expounded and the influences of piercing, rolling and mandrel drawing on the difference are studied.
通过数值模拟得到管壁的最大减薄和增厚部位，并讨论了芯轴的摩擦系数和钢管末端的压力对管壁厚度变化的影响。
The influences of friction coefficient between tube and mandrels and the press force on the end of tube for thickness chang...
通过数值模拟得到管壁的最大减薄和增厚部位，并讨论了芯轴的摩擦系数和钢管末端的压力对管壁厚度变化的影响。
The influences of friction coefficient between tube and mandrels and the press force on the end of tube for thickness chang...
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