The processes used for butt welding of welded pipe unit include uncoiling, pinching, straightening, shearing, guiding, butt welding, looping and centering. The process can be said to be complex and changeable. First, I will briefly introduce the first three steps of butt welding process of welded pipe unit:
The specific butt welding process flow is:
After the plate coil is properly positioned, the left and right taper heads of the uncoiler can be inserted into the steel coil and rotated at the same time, and the head can be sent to the pinch roll. The pinch roll is rolled down, and the steel coil trolley and magnetic roll can return to the original position.
In order to allow the spring steel belt to be accurately aligned, the uncoiler can move+150mm axially before operation. After the uncoiler is started, the strip steel reaches the straightener equipped with dust removal device through the pinch roll.
3. The straightened spring steel strip is sheared at the head and tail of the strip steel with a sliding hydraulic shear (the sheared strip steel head can immediately slide into the waste box, and the sheared strip steel tail can be collected in the special aggregate box outside the line with an output device).
