Table of Contents
Advertisement
Schedule: Parameters selection of manual tungsten electrode argon arc welding for aluminum
Thickness
Groove
(mm)
1.5
I Groove
2
3
4
5
8
Y Groove
10
12
16
20
16～20
Dual Y Groove
22～25
Possible problems in welding process
Following phenomenon may be related to the accessories, gas, environmental factor and power
supply condition used. Please improve operating condition to prevent theses phenomenon
occurrence.
A. Welding point darkening
——This phenomenon indicates that welding joint is oxidized without taking effective protection
measures. You can check as follow:
1. Confirm valve of argon bottle is opened and with sufficient pressure. Generally, refill argon if
internal pressure of argon bottle is less than 0.5 MPa.
2. Check the flow valve for argon whether is opened and with sufficient pressure. In order to save
argon, you may select different flow according to the actual welding current, but lower flow may
cause welding point not covered by protective gas completely. It is recommended that the argon
flow should be not less than 5 L/min regardless of the current.
3. The simplest method for checking gas flow is that feel the gas on the nozzle of welding torch by
hand and check whether the pipeline of welding torch is blocked.
4. Bad sealing performance of pipeline or lower purity may affect welding quality.
5. Strong air flow in operating condition may affect welding quality as well.
6. Adjustment for duty ratio is too low.
B. It is difficult to arc and easy to break.
V. Preparation and operating for welding
and aluminum alloy (only for information)
Diameter of
Welding layer
tungsten
(front/back)
electrode
(mm)
1/0
2
1/0
2～3
1/0
3
1～2/1
4
1～2/1
4
2/1
5
3～4/1～2
5
3～4/1～2
5～6
4～5/1～2
6
4～5/1～2
6
2～3/2～3
6
2～3/2～3
6～7
Diameter of
Preheating
welding
temperature
℃
wire
( )
1.6～2.0
_
2～2.5
_
2～3
_
3
_
3～4
_
4～5
100
4～5
100～150
4～5
150～200
5～6
200～220
5～6
200～260
5～6
200～260
5～6
200～260
- 10 -
Nozzle
Welding
Argon
diameter
current
flow
50～80
7～9
50～80
8～12
15～180
8～12
180～200
10～15
180～240
10～15
260～320
16～20
10～12
280～340
16～20
14～16
300～360
18～22
14～16
340～380
20～24
16～20
360～400
25～30
20～22
300～380
25～30
16～20
360～400
30～35
20～22
(mm)
8
8～12
8
8～12
8～12
Advertisement
Table of Contents
