Daihen MWP-18 Manuale di istruzioni - Pagina 12

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Changing Tungsten Electrode

(From φ 3.2 to φ 1.6)

4.1 Parts Necessary for φ 1.6

● Tungsten electrode ( φ 1.6 – 150 mm)

● Collet body (for φ 1.6)

● Collet (for φ 1.6)

● Lea collet (for φ 1.6)

4.2 How to Change

● Remove a set screw and take out a lea collet.

● Loosen a lea collet body by turning its head and remove a nozzle, a collet body, a tungsten electrode

and a collet.

● Insert a tungsten electrode ( φ 1.6) into a collet (for φ 1.6) prepared, and then screw that into a collet

body (for φ 1.6).

DO NOT forget to change an insulator as well when changing a collet body from φ 3.2 to φ 1.6.

● Screw a nozzle into a collet body.

● Insert a lea collet (for φ 1.6) into a lea collet body.

● Adjust the length of the part of a tungsten electrode that is sticking out according to the shape of the

welded and the location to be welded.

● As soon as the length to be stuck out is decided, tighten the head of a lea collet body and mount a set

screw.

Insulator

Nozzle

CAUTION

Connection to Welding Power Source

CAUTION

● Refer to an instruction manual for each welding power source, and connect a torch properly.

Collet

Collet Body

Thoriated Tungsten Electrode

● Make sure to tighten a collet body and a torch body firmly. If

either of them is loose even slightly, a collet might be burned and

seized up or an operator might get burn due to the heat-up.

● Stick out an electrode 5 to 10 mm from the tip of a nozzle. If the

tip of the electrode is located inside the nozzle, the nozzle might

become damaged due to the arc heat-up.

● Tighten each connection firmly. If there is any loosened part, fire or

burn might be caused due to the heat-up.

One set each

Lea Collet Body

Torch Body

Fig. 2

– 5 –

Lea Collet

Set Screw