M1.3.TIG200PAC.NLFREN 21052019
17
NL
Tabel 8�2 - Referentietabel voor TIG lassen
Elektrode diameter (mm)
Aanbevolen lasstroom (A)
1,0
5~30
1,6
20~90
2,0
45~135
2,5
70~180
3,2
130~200
8�4�3 TIG puls lassen
23
/
50
E201 SC-A0
10.4.3 Pulsed TIG welding
Fig 10.14 DC Pulse TIG Current Change Waveform
In pulsed TIG mode, all DC TIG parameters except current (I3) and another 4 adjustable
parameters are available for this machine. Describe them as below.
Peak current (Ip):
It should be adjusted according to users’ technical requirements.
Base current (Ib):
It should be adjusted according to users’ technical requirements.
Pulsed frequency (1/T):
T=Tp+Tb. It should be adjusted according to users’ technical
requirements.
Pulse duration ratio (100%*Tp/T):
The percentage peak current time holding in pulse period. It
should be adjusted according to users’ technical requirements.
10.4.4 AC square wave TIG welding
2.5
70
～
180
3.2
130
～
200
Afb. 8.14 Stroomverandering golfvorm tijdens DC TIG puls lassen
In TIG puls lassen, zijn alle DC TIG parameters, behalve de stroom (I3), en 4 andere instelbare parameters zijn beschikbaar
voor deze machine. Hieronder de omschrijving ervan:
• Piekstroom (Ip) :
Deze moet aan de technische eisen van de gebruiker aangepast worden.
• Secundaire stroom (Ib):
Deze moet aan de technische eisen van de gebruiker aangepast worden.
• Pulsfrequentie (1/T) :
T=Tp+Tb. Deze moet aan de technische eisen van de gebruiker aangepast worden.
•
Pulstijd coëfficiënt (100%*Tp/T):
Het piekstroom percentage tijdens de pulstijd. Deze moet aan de technische eisen
van de gebruiker aangepast worden.
8�4�4 AC blokgolf bij TIG lassen
24
/
50
E201 SC-A0
tc
tp
I0
I2
I1
tu
td
I0-Initial current, I1-Welding current, I2-Pilot arc current,
tu-Upslope time, td-Downslope time
tp-AC period, tc-Cathode current time
Fig 10.15 AC Square Wave TIG Current Change Waveform
In AC square wave TIG welding, the pre-flow time and post-flow time are the same with those in DC
TIG welding, and others are described as below.
Initial current (I0), welding current (I1) & pilot arc current (I2):
The preset value of the three
parameters is approximately the absolute average of the practical welding current, and can be
adjusted according to users’ technical requirements.
Pulse frequency (1/tp):
It can be adjusted according to users’ technical requirements.
Cleaning strength (100%*Tc/Tp):
Generally, in AC welding, when taking the electrode as anode,
the current is called cathode current. Its main function is to break up the oxidized layer of the
workpiece, and the cleaning strength is the percentage cathode current holding in the AC period.
This parameter is 10~40% commonly. When the value is smaller, arc is concentrative, molten pool is
narrow and deep, and when it is bigger, arc is dispersive, molten pool is wide and shallow.
10.4.5 AC pulsed TIG welding
I0 - Beginstroom, I1 - Lasstroom,
I2 - Pilootboogstroom,
tu - Upslope tijd, td - Downslope tijd
tp - AC tijd, tc - Kathodestroom tijd
Afb. 8.15 Stroomverandering golfvorm tijdens AC TIG lassen
Lasstroom
Begin-
stroom
Upslope
Voorafgaande selectie
Downslope
Pilootboog
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