The some knowledge for Welding steel pipe machine line

Price - related factors of spiral welded pipe equipment

1: rolling the bottom line
Rolling bottom line is the unit center line and the flat roll throat diameter (the smallest) when the line, this line and the work surface of the straight line distance, which is the roll throat diameter and the distance from the floor.Rolling bottom line high in the factory when the factory has been identified, such as 50 units of the rolling bottom line is 235MM high, 76 units of the rolling bottom line height of 265MM, 89 units of the rolling bottom line height of 280MM.Different manufacturers, this data will change.The vertical distance between the upper edge of the lower roller ring and the bottom plate is also the height of the rolling bottom line (the height of the vertical roller is not adjustable)

2: starting bottom diameter and bottom diameter increase
The bottom diameter (flat roll throat diameter) is also fixed, each incremental increase 0.6MM-0.8MM, incremental (the first roll forming the first frame is W variant, bottom diameter in the thickest and thinnest of the middle)The purpose is to allow each sorties faster than the speed of the previous one, is behind the front of the pull, for the benefit of pipe molding.

3: the height of the insurance mat
Insurance mat is placed on the lower slider and the arch of the middle beam of a cast iron mat, by the relatively large impact when the middle of this pad will be pressed into the bottom, so that the shaft from damage.The height of the pad is fixed, decreasing 0.3MM-0.4MM for each sorting (because the roll is increasing 0.6MM-0.8MM for every sort of roller, 0.3mm-0.4mm for the insurance pad, so the rolling bottom line is at the level).

4: the change of the bottom line of sizing during the round change
In the circle variable square, especially round variable rectangular tube (flat out), sizing should be adjusted to the center line unchanged, the end