Abstract��A kind of torsion testing machine in new design was introduced. The sample was fixed using hydraulic rotating clamps. The constant tensioning force could be applied to the long wire type sample by servo motor- ball screw-sensor. The clamps could be bidirectionally rotated via the driving and controlling with servo motor-reducing mechanism. Therefore�� several kinds of torsion test and low-cost low-speed tension-torsion fatigue test for the long wire steel samples ([?]7 mm-[?]14 mm�� 2 000 MPa) could be fulfilled upon the machine. By monitoring the change of torque in real time�� the machine had the state-of-the-art capability of rotating with controllable and changeable speed from 0.000 5 to 30 r/min as well as the instantaneous critical sampling when the torque decreased suddenly (i.e.�� max torsional plasticity). Hence�� the internal structure and external surface morphology of sample could be analyzed subsequently.
�� �����Ž�ΰ��Ǯ������Ǯΰ��. ��һ������Ťת������������Ӧ��[J]. �й������ڿ���, 2016, 34(4): 29-32.
FANG Jian��ZHANG Jian-wei��QIAN Zheng-guo��QIAN Wei-guang. Design and application of new-generation torsion testing machine. Chinese Journal of Iron and Steel, 2016, 34(4): 29-32.
2016, Vol. 34 
