Ku nst sto ffschweißtec hni k
Welding process
Chapter 6
25.11.11
Working Instructions WIDOS 7000 WM
page 54 of 98
•
Take out the welded pipe afterwards close clamping tools with <joystick 6 + 8> on:
.
•
Completely open machine tables, <joystick 12> on:
.
Welding is completed.
6.3.9.
Factors for the welding of angle and T-piece
If welding angles, the welding surface of the pipe and thus the necessary pressure
changes.
Calculate the necessary pressure as follows:
•
Take the prescribed value for adjusting or cooling from the table.
•
Multiply the pressure value with factor /cos (angle).
This will give the following factors:
Welding 15°
(chamfered pipe with 7,5°):
1,01
Welding 22,5°
(chamfered pipe with 11,25°): 1,02
Welding 30°
(chamfered pipe with 15°):
1,04
Welding 45°
(chamfered pipe with 22,5°): 1,08
Welding 60°
(chamfered pipe with 30°):
1,15
Welding 90° T
(chamfered pipe with 45°):
1,41
Welding 60° T
(chamfered pipe with 60°):
2,00
Welding 45° T
(chamfered pipe with 67,5°): 2,61
The calculated value for the first welding of T-pieces is to be cut in halves if the pipe ends
were cut off (chapter: 6.5).
•
As usual add drag pressure.
All other parameters can remain the same.
6.4. Formulas for the welding of segmented bends
Calculation of the cutting angle to be adjusted (this one corresponds to the required angle at
the clamping tools resp. reducer inserts):
Bend angle
Cutting angle = -----------------------------------------
Number of all welding surfaces
Example: 1
90° bend in 4 pieces (6 welding surfaces)
90°
Cutting angle = ----- = 15°
6
Example: 2
45° bend in 3 pieces (4 welding surfaces)
45°
Cutting angle = ----- = 11,25°
4
angle
