Objective •To gain experience and knowledge of the use of MIG arc-weld a rc-welding ing and materials safe • To discipline should
students
using
workshop
•To •To provi provide de expos exposur ure e to the the studen students ts about about securit! is important •"nsure that the students that the! know how to use TIG-machine and hand tools in the right wa! •Improve the students during their patience do workpiece •#ble to help students in the job environment re$uires skill
Introduction Metal inert gas welding, or MIG welding, is the most widely used of the arc welding processes. It is suitable for everything from hobbies and small fabrications or repairs, through to large structures, shipbuilding and robotic welding. MIG can be used on a broad range of materials and thicknesses, and the latest SuperPulse technology enables MIG to give a finish that is similar to that obtained with TIG tungsten inert gas! welding, yet with the speed for which MIG is renowned. The concept underlying MIG welding is simple, with the arc being struck between the tip of the reel"fed wire as it emerges from the torch, and the workpiece. # shielding gas prevents o$idation forming, or the use of some flu$" cored wires avoids the need for a shielding gas. %ith most MIG welding sets, the user sets the wire feed speed, which determines the current& then the user sets the voltage to suit that current. 'ase of use is clearly a ma(or benefit of MIG in many applications, but speed is also important. It is far )uicker to lay down weld metal with MIG than TIG, MM# manual metal arc " or *stick* welding! or gas welding.
%#&"T' ()*I+G ,O* %ome of the measures that need to .e done while in welding workshop area ,ell-dressed/ neat and safe
•
,ear goggles when welding Goggles protect the e!es when students operate TIG welding •
(o not look at welding with the naked e!e as strong arc light can cause e!e pain/ glare and 0uic! •
1ut the lid onto the shirt before use TIG welding
•
,hen wearing an apron workshop alwa!s tie back not in front •
*emove watches/ rings and 2racelets as the! can endanger !ourself while using welding conditions and cause in0ur! •
Turn o3 welding 2efore cleaning
•
#lwa!s ensure TIG welding and hand tools are clean •
Make sure the door is not greas! so as to avoid injuries from occurring •
2efore getting into the workshop the students must clad mechanical workshop •
%tudents who use TIG welding or e$uipment without the permission of the lecturer will be disciplinar! action •
In the event of an! injur! to the student/ please report it immediatel! to a lecturer in action further •
apparatus
&unction
,elding machine uses an alternating current entr! 4#)5 and produces direct current 4(65
Machine MIG
1urpose is to guide the welding wire from the wire feeder/ through the gun cable and up to the contact tip MIG Guns
-&low meter gas measure serves as a gauge for the working pressure re$uired -There are readings on the outside while the inside of the glass tube there is a ball 7oat that will be used to show the pressure level of work re$uired Prest"+"ite MIG %elding Gas -egulators
-Meter readings will be taken at the center of the ball at the top of the ball
used as a tool for cleaning, polishing
,ire brush
sed for high production welding and have the fastest of the wire feed speeds. 6ase ,ire &eed
1rotect the e!e from the light when welding
%hield
*eferences Internet 05 http899wwwmachinebuildingnet9ta9t:0;;htm <5 https899artisansas!lumcom9introduction-totig-welding9 =5 http899wwwwballo!scouk9TIG9what-is-tigweldinghtml
2ook 05
2asic TIG > MIG ,elding
<5
The Miller Mig Handbook
3)
How to Weld" book by Bridigum
6O+6?)%IO+ &rom the results of this assignment I have learned man! things during this protect/ especiall! in dealing with MIG machine This is because there are several steps that must be followed before conducting proper welding MIG is &or example8 adjust the gas pressure which is suitable for welding workpiece I also gain experience and knowledge of the use of MIG arc-welding and materials safe #t last also know how to use MIG-machine and hand tools in the right wa!
Title MIG ,elding4Metal Inert Gas5 ?ecture8 @#&IA#+ 2I+ @B O%+I+
0 6lear the part of the metal sheet before start welding
< 1ut two metal sheet on the 7at place to butt weld
=6onnect the earth line one the iron material so that current can be discharge
; %etting the MIG machine suitable current #69(6 and the spark
C +ext weld the nails at the side between two metal sheet
D #fter weld the nails /then butt weld the metal sheet at the side between two metal
E #fter butt joints/clear the slag to make sure the welding is done
F )se the -cramp to let the metal sheet to became ? shape and weld the nails at both side of the metal sheet
H #fter weld the nails at the both side can start the corner joint
0:#fter welding the corner joint o3 the power and the gas / let the machine at the safet! condition
