Coupling Make Up Machine

This machine is used for making up or discharge couplings on OCTG pipe/tubing and casing.

It includes following main parts:
① Main tong
a) The main tong is a closed jaw clamp that does not move with the screw thread.
b) The main tong is hydraulically driven and can rotate in both forward and reverse directions, with a two speed planetary gear transmission; The hydraulic motor model is JM13-F1.8H (1.8L/r, maximum speed of 160 rpm, rated pressure 20Mpa, maximum working pressure 25Mpa).
c) Clamping method: Three jaw plate roller climbing clamping: There are a total of 9 pliers evenly distributed in the 360 ° circumferential direction of the coupling.
Clamping coupling: As the torque of the clamp head changes, the clamping force automatically changes proportionally, that is, the greater the torque, the greater the bite depth of the clamp teeth, and vice versa. The design of this clamping method ensures that the damage to the clamp teeth is minimized when obtaining the required torque.

d) The main tong is equipped with a rotary encoder to measure the number of turns, in order to collect signals of speed and turns
e) The maximum diameter of the main tong is Φ 310mm.
②Back-up tong:
a) The backup pliers are closed end pliers that grip the pipe body and can move with the screw thread.
b) The clamping method of the backup tong is the same as that of the main tong, and the initial clamping force required for the backup clamp is completed by the cylinder
c) There is a torque sensor on the backup pliers, which can accurately measure the torque when making up or breaking out.
d) The transfer of the backup tong is completed by the cylinder, with a maximum transfer distance of 0.8 meters.
e) The maximum diameter of the backup tong is Φ 310mm.
③Control system
a) The main tong is controlled by an electric hydraulic directional valve for forward and reverse rotation.
b) The initial clamping force of the backup tong cylinder is controlled by an electric air valve
c) The backup pliers movement cylinder is controlled by an electric air valve.
d) Adjust the handwheels of the two hydraulic pumps in the power station to adjust the flow rate (6-185 liters/minute).
e) Adjusting the pressure of the power station can adjust the system pressure.
f) During mechanical clamping, the equipment should have functions such as button control, turn by turn control, and joint control. And can display and record.

4 Hydraulic system

The hydraulic system is servo hydraulic, controlled by servo motor, which can save energy greatly.