INTRODUCTION

Originally Inert Gas Tungsten Arc Welding (Tungsten InertGas) is a type of arc welding made the atmosphere control. Tungsten electrodes were used. Electrodes only to produce an arc only. So, for the weld when the metal Additional required to weld, trunk filler rod should be fed to the weld area as methods done in oxy-gas welding process asetilina.

During the welding process is a shield in the form of gas inert (argon & helium) is used to block the welded from atmospheric air. Shield works for prevent oxidation at the electrode tip, a puddle weld and the parent metal in the vicinity of the welded.

There are two types of commonly used welding nozzle weld TIG operation manually. For welding use per current is low (less than 200 amperes) when welding thin material, weld nozzles are usually of the type that can cooled in air conditioning. But, for welding require more current than 200 amperes, the nozzle weld should be cooled with water so that the electrodes do not become overheated.

TEORY

In TIG welding, electric arc occurs when electricity is passed to the tungsten electrode. The distance between the tip of the tungsten electrode and the workpiece surface will cause a flow of electrons. The flow of electrons in turn produce arc and high heat to melt metal.

TIG welding is done in a controlled atmosphere using a tungsten electrode which serves to produce an arc to melt the metal. Direct current or alternating current of high frequency is used to enable the resulting continuous and stable arc without touching the metal electrodes. The arc is ignited by pressing the starter switch is located on the blowpipe flame. Filler rod to feed and deposited into the cauldron of molten metal as an additive. During extended inert gas welding gas cylinder through the blowpipe from functioning as a shield to protect the molten crater of atmospheric air trapped in it.

OBJECTIVEThere are several purposes for doing this report. Among them:

To gain experience and knowledge of the use of TIG arc welding and materials safe.

To discipline students using workshop should. To provide exposure to the students about security is important. Ensure that the students that they know how to use TIG machine and

hand tools in the right way Improve the students during their patience do work piece. Able to help students in the job environment requires skill.

SAFETY DURING WORKSome of the measures that need to be done while in welding workshop are:

Well-dressed, neat and safe. Wear goggles when welding. Goggles protect the eyes when students

operate TIG welding. Do not look at welding with the naked eye as strong arc light can cause

eye pain, glare and juicy. Put the lid onto the shirt before use TIG welding. When wearing an apron workshop, always tie back not in front. Remove watches, rings and bracelets as they can endanger yourself

while using welding conditions and cause injury. Turn off welding before cleaning. Always ensure TIG welding and hand tools are clean. Make sure the floor is not greasy so as to avoid injuries from occurring. For the boys, they should ensure their hair short and neat. Before getting into the workshop the students must clad mechanical

workshop. Students who use TIG welding or equipment without the permission of

the lecturer will be disciplinary action. In the event of any injury to the student, please

report it immediately to a lecturer in action further.

APPARATUS FUNCTION

SAFETY EQUIPMENT FUNTION

GOOGLEProtective devices to protect your face and eyes from arc light.

GLOVEProtective equipment to protect the hand than the high temperature working material.

APRONto prevent sparks hit in shirt

Machine tig Welding machine uses an alternating current entry (AU) and produces direct current (DC).

Tungsten eletcrod used for drainage flow

Enhancer rod Rod additive used to strengthen the connection with the molten welding rod into a cauldron of molten enhancer.

APPARATUS FUNCTION

Regulator and Flow Meters There are three main parts of the regulator, cylinder pressure gauges and flow meters:

Flowmeter gas measure serves as a gauge for the working pressure required.

There are readings on the outside while the inside of the glass tube there is a ball float that will be used to mementukan pressure level of work required.

Meter readings will be taken at the center of the ball ata at the top of the ball.

HOS Hose is used to transport the gas from the cylinder to blowpipe. Hos is also used to drain water conditioning to blowpipe

PROCEDURE 1) clean the workpiece to be in welding

2) using iron as the base of the workpiece3) connect the earth line on iron material so that current can be

discharged4) set and adjust the appropriate protective gas and adjust the end point

tungsten5) upon completion of the current set on the machine ac / dc, take place

at the base of the workpiece metal6) Next put the two workpieces to locate the ends of the material and do

weld the nail on the connection of the workpiece7) Perform TIG weld to weld finish filling the space with the use of the

rod.8) Switch TIG weld and cover gas pressure when finished welding the

steel connections and cool the workpiece.9) Clean the slag on the workpiece by using an air purifier to get results

updates

LAP JOINT

For a lap weld, form the weld pool so that the edge of the overlapping piece and the flat surface of the second piece flow together. Since the edge will melt faster, dip the filler rod next to the edge and make sure you are using enough filler metal to complete the joint.

T-jointWhen welding a T-joint, the edge and the flat surface are to be joined together, and the edge will melt faster. Angle the torch to direct more heat to the flat surface and extend the electrode beyond the cup to hold a shorter arc. Deposit the filler rod where the edge is melting.

CONCLUSION

From the results of this assignment I have learned many things during this project, especially in dealing with TIG machine. This is because there are several steps that must be followed before conducting proper welding

TIG is. For example, adjust the gas pressure which is suitable for welding workpiece. I also use TIG welding as well although not mahir. I’m as a student have to comply with all.