Electric tube expander

The electric tube expander is composed of a tube expander and a digital display controller, and it is also equipped with a tube expander (working head). The main principle is that when the electric tube expander pushes the tube expander inserted into the pipe mouth to rotate clockwise, because there is a certain rotation angle between the expansion bead of the tube expander and the pipe, the tube expander moves forward along the center line of the pipe while rotating. In addition, the tube expander is thin at the front and thick at the back, so the expanded pipe is gradually expanded by the rotation of the expansion bead and is closely connected to the edge of the barrel hole. During the tube expansion process, as the tube expander continues to expand, the torque provided by the tube expander also increases, and the motor current of the tube expander also increases, after the computer controller samples the current, it converts the AD into the actual working current, and the data is compared with the pre-set expansion value by the voltage comparator. When the preset value is reached, the controller controls the motor to automatically stop. After the delay circuit delays the time interval, the controller automatically drives the expander to turn in the opposite direction, so that the expander begins to loosen. When the loosening time reaches the pre-set withdrawal time, the controller cuts off the power supply of the expander motor, and the expander stops, thus completing a tube expansion process.