HBS 93-20-290, Руководство по эксплуатации, Страница: 22 / 66

22 A 22 Order No. BA 93-20-290 Issue 01.03.08
4.6 Adjustment of Hydraulic Damping
A damping of the plunging movement is only required with studs above 14 mm diameter.
Screw off the cup of the damper.
Set the mark of the regulation screw to the required number using an Allan key
(size 2).
Meaning:
0-2 low damping (high plunging speed),
3-5 medium damping and
6-8 high damping (low plunging speed).
Normally, a damping above "2" should not be selected.
A proper speed must be determined via trials. The weld pool should not splash-off during
plunging, on the other hand it should form a complete collar around the stud. You should
consider that the weight of the stud increases the plunging speed when welding in
horizontal position.
When welding in sideway and especially in overhead position, the damping effect must
be set lower than in horizontal position - also with larger studs.
There must be no friction between stud and ceramic ferrule, if
so, center the foot plate of the welding gun.
When triggering the welding gun key, the welding gun lifts the
welding element always by the same lift value, independant
from the position of the welding element.
Assignment stud diameter - electrical current - welding time with lift
and projection
Example: Diameter 16 mm 1300 A 0.65 s with ceramic ferrule
Optimum parameters for an application may differ from indicated data due to plate
thickness, welding position, coatings, type of ceramics ferrules etc.
At first one determines current and welding time based on stud diameter at the welding
place, then lift and projection values depending on type of stud tips (to ceramic ferrule
or face area). Note the plunging speed!
Example 1: Diameter 16 mm: 1300 A, 0.65 s, flat stud face (with alu-ball): lift 3 mm,
projection 3.5 mm = 100 mm/s plunging speed.
(see section 5.5)