In fact, the axial movement of the weldment on the welding turning roll, the weldment itself is in a spiral motion, if measures can be taken, the left-hand rotation of the weldment is changed to right-handed or right-handed to left-handed until The weldment is no longer spiraled. Currently, there are three types of actuators that can accomplish this task:
(1) jack-up actuator
The roller on one side of the driven roller frame can be lifted and moved to offset the axis of the weldment, and at the same time, the axial component of the weldment is changed by its own weight. The advantage of this adjustment method is that the adjustment sensitivity is high, and the disadvantage is that the manufacturing cost is high and the volume is large.
(2) Offset actuator
The rollers on both sides of the driven roller frame can be offset in the same direction along the vertical center line, thereby changing the axial friction component of the roller and the weldment. This adjustment method has the advantage of high sensitivity, but the biggest disadvantage is that the wear of the roller is too large.
(3) Translational actuator
The rollers on both sides of the driven roller frame can be horizontally moved perpendicularly to the axis of the weldment at the same time, thereby achieving the purpose of adjusting the axis of the weldment and adjusting the angle of the axis of the roller. This adjustment method has the advantages of good stability, low manufacturing cost, simple structure and no additional installation space. This kind of actuator has been analyzed and found to be the easiest, most reliable, and the lowest cost. We generally use this design.