Operation steps and precautions for twisting test machine

Operation steps and precautions for twisting test machine
A torsion testing machine is a device specially used to apply torque to the sample and measure the torque magnitude. It has many types and different structural forms, but it is generally composed of two basic parts: loading and force measurement. Now, the NJ-100B torsion test machine is used as an example to illustrate the structure and working principle of the torsion test machine.
1. Operation steps
1) Estimate the torque required by the experiment and select the required velocity dial.
2) Select appropriate jaws and bushings according to the shape of the sample clamping end.
3) Install the pen and paper on the automatic plotter and turn on the plotter switch.
4) Turn on the power supply and adjust the knob to target the zero point.
5) Install the specimen. First insert one end of the specimen into the fixing chuck and clamp it. Adjust the horizontal movement of the loading mechanism so that the other end of the specimen is inserted into the movable chuck and then clamped.
6) Loading. Press the forward or reverse button on the loading switch as needed, and gradually adjust the speed potentiometer to rotate the DC motor to apply torque to the specimen.
7) After the experiment is over, stop the machine immediately, remove the test piece, restore the machine and clean the site.