Page 405 of 561

WIRE WELDING

Introduction

The advantages of wire welding are:

In Wire Welding a wire from a reel is fed through a welding torch passing a contact tip supplying the welding current. The wire melts and is transferred to the pool through the arc that is shielded by a gas. The shielding gas is necessary to prevent oxygen from the air oxidising the pool.

• Increased deposition rate (Weight of weld deposited per hour). • Increased operating factor (The time that the welder actually is welding).

The gas has the same function as the coating on an electrode producing a smoke shield.

Cylinder with shielding gas

Wire spool Wire feeder

Welding Torch

Power source

4.03

404