Prior To Welding - Kuhtreiber 150 / TIG LA Bedienungsanweisung

DETERMINATION OF THE WELDING ELECTRODE
Table 8
Welding
Electrode
current
diameter
(A)
6-70 1.0 mm
60-140 1.6 mm
120-240 2.4 mm
HOLDING OF THE WELDING TORCH DURING WEL-
DING
position w (PA)
PREPARATION OF BASIC MATERIAL
In table 9 there are given values for preparing mate-
rial. Sizes shall be determined according to picture 9.
Picture 9
Table 9
s (mm) a (mm)
0-3 0
3 0
4-6 1-1.5
BASIC RULES DURING WELDING BY TID METHOD
1. Purity - grease, oil and other impurities must be
removed from the weld during welding. It is also
necessary to mind purity of additional material
and clean gloves of the welder during welding.
2. Leading additional material - oxidation must be
prevented. To do so, flashing end of additional
Welding nozzle
 (mm)
o
n ( )
(l/min)
4/5 6/8.0
4/5/6 6.5/8.0/9.5
6/7 9.5/11.0
position h (PB)
position s (PF)
s
d a
d (mm) α (
0
0.5 (max)
1-2 60
material must be always under the protection of
gas flowing from the hose.
3. Type and diameter of tungsten electrodes - it is
Gas
necessary to choose them according to the
flow
values of the current, polarity, type of basic
material and composition of protective gas.
5-6
4. Sharpening of tungsten electrodes - sharpening
6-7
the tip of the electrode should be done in tra-
7-8 verse/horizontal direction. The tinier the rough-
ness of the surface of the tip is, the calmer the
burning of the el. arc is as well as the greater
durability of the electrode is.
5. The amount of protective gas - it has to be
adjusted according to the type of welding or
accor-ding to the size of gas hose. After finishing
the welding gas must flow sufficiently long to
pro-tect material and tungsten electrode against
oxi-dation.
Typical errors of TIG welding and their influence on
the quality of weld
Welding current is too:
Low:
High:
Errors can be also caused by bad leading of the wel-
ding torch and bad adding of additional material.
NOTICE!
The welding machines 150, 170 provide the possibility
of connecting a remote control. For connecting the
remote control turn the switch on (pic. 10). For
welding without a remote control (the remote control
is not connected to the machine) is necessary to have
the switch on the front panel off (pic. 10).
Picture 10
o )
0

Prior to welding

0
IMPORTANT: before switching on the welder, check
once again that the voltage and frequency of the
power network correspond to the rating plate. Ad-
just the welding current using the panel potentiome-
ter. Adjust the PROCESS switch to the most suitable
position according to the type of welding to be carried
out. Turn on the welder by the supply switch (pos. 1,
pic. 2). The green signal light shows that the welder is
switched on and ready to operate.
-39 -
unstable welding arc
damage of the tip of tungsten electrode
causes broken burning of the arc