Basics of welding techniques

In this chapter will discuss the basic electrical welding techniques.

a. The principle of electric welding

Joining of two or more metals into a melt or by searching with the electric arc flame as a source of electrical power as heat transfer. Used flame as a power divided into two, namely

1. Resistance welding
2. Electric arc welding flame


pan style="font-weight:bold;">b. Electrodes

Electrode is the most important part in the weld arc welding electrodes arc. During will expire at ongoing welding. Types will affect welding electrodes, so that the selection and appropriate types must be elekroda. Protective grouth based classified into 2 kinds of electrodes and electrode plain webbed.
Webbed electrode consists of core and protective a part or flux. Done flux coating can be a way in spray, dip or her destruction. Purposes in this flux at the electrode to burn will produce CO2 in order to protect the liquid welding, electric arc of oxygen that may have oxidized welding material so as to affect the nature of the mechanism weld metal.

So the membrane electrode has functions include:

1. preven formation of oxides and metals during nitrad welding process.

2. Making protective piston so as to reduce the speed of cooling, with the aim of the welded workpiece does not have brittle or fragile.

3. Provide special sifat2 of results-welded weld by adding certain substances contained in the membrane.

4. Stabilize the arc heat and direct flame of fire arc so easily in control.
Because the choice of the electrode should be appropriate to consider the following.

• Type in the metals that will weld
• Thickness of material that will las
• mechanical strength expected from the results of welding
• Outstanding welding and
• Establish hem workpiece