7
Start-up and weld quality check
Page 35
Stud welding unit
operating manual
Date:
July 2021
ALPHA 850
07.2021 / EN
Rev.:
A
•
Parameters for the short cycle drawn arc process
Stud type
Shaft Ø [mm, M]
Weld
Ø [mm]
Welding current
I [A]
Welding time
t [ms]
SC stud [3.0, M3]
4
400
15
SC stud [4.0, M4]
5
500
15
SC stud [5.0, M5]
6
600
20
SC stud [6.0, M6]
7
700
25
SC stud [8.0, M8]
9
850
40
Rule of thumb for short cycle drawn arc process:
•
Weld current [A] ≈ 100 × Weld Ø [mm]
•
Weld time [ms] ≈ 4 × Weld Ø [mm]
•
Parameters for the drawn arc process
Stud type
according to Tucker
Weld
Ø [mm]
Welding current
I [A]
Welding time
t [ms]
IS stud
3
200
150
IS stud
4
280
200
IS stud
5
350
230
KB6, MR M8, S6
6
410
250
MP (F) M8
7
470
300
MR M10,S8
8
550
300
MP (F) M10
9
650
300
KB10, MR M12, S10
10
750
350
MM12, S12
12
850
400
Rule of thumb for drawn arc process:
•
Weld current [A] ≈ 70 × Weld Ø [mm]
•
Weld time [ms] ≈ 40 × Weld Ø [mm]
