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Manual Clarke Arc/Tig135 Welder

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Manual

PRINCIPLES OF OPERATION

The ARC/TIG welder, as its name suggests, is designed to be used for both Metal ARC, AND TIG

welding. To accomplish this, two sets of welding leads are required, one for each method

employed.

ARC WELDING

Shielded Metal Arc welding is by far the most widely used of the various arc welding processes.

It employs the heat of the arc to melt the base metal and the tip of a consumable flux covered

electrode.

The electrode and the workpiece are part of an electric circuit. This circuit begins with the

electric power source and includes the welding cables, an electrode holder, a workpiece

connection, the workpiece, and an arc welding electrode. One of the two cables from the power

source is attached to the work. The other is attached to the electrode holder.

Welding commences when an electric arc is struck between the tip of the electrode and the work.

The intense heat of the arc melts the tip of the electrode and the surface of the work close to the

arc. Tiny globules of molten metal rapidly form on the tip of the electrode, then transfer through

the arc stream into the molten weld pool. In this manner, filler metal is deposited as the electrode

is progressively consumed.

The arc is moved over the work at an appropriate arc length and travel speed, melting and fusing

a portion of the base metal and continuously adding filler metal. Since the arc is one of the

hottest of the commercial sources of heat (temperatures above 9000

F (5000

C) have been

measured at its centre), melting of the base metal takes place almost instantaneously upon arc

initiation.

If welds are made in either the flat or the horizontal position, metal transfer is induced by the

force of gravity, gas expansion, electric and electromagnetic forces, and surface tension. For

welds in other positions, gravity works against the other forces.

The process requires sufficient electric current to melt both the electrode and a proper amount of

base metal. It also requires an appropriate gap between the tip of the electrode and the base

metal or the molten weld pool. These requirements are necessary to set the stage for

coalescence.

The sizes and types of electrodes for shielded metal arc welding define the arc voltage

requirements within the overall range and the current requirements within the overall range. The

current may be either alternating or direct, depending upon the electrode being used, but the

power source must be able to control the level of current within a reasonable range in order to

respond to the complex variables of the welding process itself.

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Specifications

Brand	Clarke
Model	Arc/Tig135
Category	Welders
File type	PDF
File size	1.04 MB

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Can I store power tools in a shed or garage? Verified

In general, you can store power tools in a shed or garage, even if it sometimes freezes there. However, it is better for the lifespan of the power tool to store it in a dry place without major temperature fluctuations. In a shed or garage, differences in temperature can cause condensation to form, which can cause rust. In addition, tools that run on batteries last shorter and do not charge as well at very low temperatures. To be sure how your power tool needs to be stored, always thoroughly read the user manual.

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