-
15
-
8.4 Nozzle for Gas Lens
When a fluid flows inside a tube, the bigger the value of L/D is, the
easier it is to obtain the streamline flow.
(L: length of a tube, D: diameter of a tube)
Gas lens has this logic applied.
●
As gas is spouted from a nozzle in a streamline flow,
it has good shield effect.
●
Even a small gas flow rate brings about sufficient
shield effect.
●
As the tungsten extension can be adjustable, more
space between a nozzle and a workpiece can be
obtained.
●
That makes it easier for operator to observe arc and
the working area well. Moreover, welding in a
narrow area will be feasible.
●
The productivity will rise and the damage to a nozzle will be far reduced.
Therefore, a gas nozzle is very useful in high-quality or complicated welding.
Note: 1. Gas lens is incorporated as standard for an air-cooled torch and a water-cooled torch.
2. When a nozzle for a gas lens is not used, an insulator on Parts List in Item 13 is not necessary.
8.5
Rear Collet Body Assembly
Rear collect body assembly can be separated from the torch body.
To reduce electrode replacement time, prepare more than two rear collect body assemblies equipped with
new electrodes.
Fig. 8.1 Rear Collet Body Assembly
Gas lens controls the flow of shield gas at a uniform pace.
Gas lens has the following advantages.
●
普
通
の
5
~
7
倍
●
突
き
出
し
長
さ
を
大
き
く
で
き
ま
す
。
5 to 7 times
longer than usal
This length
Is adjustable