Welding, cutting, and brazing welding is a process that joins materials together by melting a metal work piece along with a filler metal to form a strong joint. Migmag welding 30 flux cored electrodes 33 tig welding 34 oxy fuel gas cutting 37 plasma cutting 44 safety always 46 conversion data inside back cover air products welders. Weldingoxy fuel wikibooks, open books for an open world. Oxyacetylene gas welding techniques basic understanding of the oxyacetylene gas welding process.
Please note materials for this lesson will continue to be used for the remaining two lessons. Chapter 3 introduction to welding in the navy as well as private industry, welding is widely used by metalworkers in the fabrication, maintenance, and repair of parts and structures. Pass a written test on safety and operation procedures on the oxy acetylene unit with a minimum of 100 accuracy. Oxyfuel welding commonly called oxyacetylene welding, oxy welding, or gas welding in the u. Fundamentals of gas cutting and welding ced engineering. Oxy acetylene welding is a welding process manually, in which the surfaces to be joined, which is warming to melt by a gas flame oxyacetylene with or without filler metal, where the connection process without emphasis. This heat is further used to melt interface surfaces of welding plates which are held together to form a joint. A distinct advantage of arc welding over gas welding is the concentration of heat. In this process, mostly oxyacetylene gas is used as fuel gas. The combination text and workbook approach allows students to work at their own pace. Welders handbook for gas shielded arc welding, oxy fuel.
Engineering, computer programming, education, and science involve welding. Hot work hazards hot work has the potential to unite all three parts of the fire triangle. Competencies given a functional oxy fuel gas unit, instruction and demonstration of use, each student will be able to. This video and page is not intended to be a complete oxyfuel safety course. Pass a written test on safety and operation procedures on the oxyacetylene unit with a minimum of 100 accuracy. Competencies given a functional oxyfuel gas unit, instruction and demonstration of use, each student will be able to. Introduction to welding technology page 3 of 9 of a welding rod is to supply filler metal to the joint. Oxyfuel welding equipment in the hands of an expert can actually do some things that tig welding struggles with. Describe the plasma arc cutting process and its applications in the. This is a good book to learn oxyfuel gas welding, this is a paperback version of the book. Of all the welding equipment there is, oxygen acetylene torch equipment training is probably the the most neglectedand this is the stuff most likely to hurt you.
Oxyfuel welding is a critical process in welding instruction. Oxy fuel refers to an oxygen and fuel gas mixture being burned rapidly from compressed sources, such as large acetylene cylinders or more commonly, a propane tank one you may find on a barbecue. Welding unit 6 oxyfuel cutting unit 7 plasma arc cutting. Here, from the american welding society, are ten reasons they are taking up the torch. Welding and allied processes include arc welding, oxyfuel gas welding, openflame soldering, brazing, thermal spraying, oxygen cutting, and arc cutting. Oxyfuel welding commonly called oxyacetylene welding, oxy welding, or gas welding in the united states and oxyfuel cutting are processes that use fuel gases or liquid fuels such as gasoline and oxygen to weld or cut metals.
Fusion weldinga welding process that joins metals by heating them to be a melting point and allowing them to fuse or flow together. Selecting, assembling and conducting preoperational checks of oxyacetylene gas welding equipment. Flux core welding fcaw shielded metal arc welding smaw stick welding. This type of filler metal is often used for gas welding. One application is welding oil soaked castings like crankcases and transmission housings. At this temperature of around 960c depending on type of alloy, the steel has lost protective properties against oxygen and is still solid. Oxy acetylene welding ofw fundamentals pressure settings. Resistance welding is a process used to join metallic parts with electric current.
Keep a reference book in the garage with your welding gear or print out this guide. In addition to the purposes of welding connecting, gas welding can also be used as preheating, brazing, cutting, and hard facing. How to operate an oxyacetylene cutting torch snapguide. Gas welding is a type of liquid state welding process in which fuel gases burns to generate heat. In electricarc welding, the term electrode refers to the component that conducts the current from the electrode holder to the metal being welded. Introduction to welding from the industrial revolution to. Module 2 unit 7 industrial insulation phase 2 2 plasma arc cutting revision 2. This process can be done with or without help of filler material. Presents the fundamentals of oxyfuel welding in an easy to understand text.
The harris products group is a world leader in metal working products used in the brazing, soldering, welding, cutting and gas distribution industries. Migmag welding 30 flux cored electrodes 33 tig welding 34 oxyfuel gas cutting 37 plasma cutting 44 safety always 46 conversion data inside back cover air products welders. An introduction to gas welding oxyacetylene this is a video by the world association of technology teachers. Gas welding and cutting oxy fuel welding, commonly referred to as oxy welding or gas welding is a process of joining metals by application of heat created by gas flame. Oxyacetylene welding, commonly referred to as gas welding, is a process which relies on combustion of oxygen and acetylene. The company was formed in 2006 with the merger of harris calorific, inc.
Now open both cylinders valves no specific order but only open the acetylene tank about a 12 turn, the oxygen should be opened all the way. Welding metals with oxyacetylene gas welding process in the downhand position. Free text books on welding hand books pdf are available for download. Read welding safety tips design of welded structures download esab welding handbook 8th edition download fundamentals of welding skills download friction stir welding from basics to applications download handbook for gas welders download metallurgical modelling of welding download principles of welding download resistance. Fusion welding, with or without filler metal, in which the heat for welding is produced by the combustion of a fuel gas or gasses with an admixture of oxygen. There are several forms of resistance welding, including spot welding, seam welding, projection welding, and butt welding. Upon successful completion of the course, the learner will be proficient in the following key areas. Once you learn the basics of gas welding, you will find the oxy fuel process adaptable to brazing, cutting, and heat treating all types of metals. A variety of fuel gases can be used in this task, such as propane, acetylene, natural gas, compressed gasoline fumes or anything else easily combustible. Oxyfuel oxyacetylene welding a guide to gas welding. Oxyfuel welding ofw is a group of welding processes that join metals by heating them with a fuel gas flame or flares with or without the application of pressure and with or without the use of filler metal. Oxy fuel welding includes any welding operation that makes use of a fuel gas combined with oxygen as a heating medium. Includes information about forehand and backhand welding, outofposition welding, welding thick materials, welding aluminum, oxyfuel cutting, brazing, soldering. Oxy fuel equipment is versatile, lending itself to welding, brazing, braze welding, silver soldering, metal heating for bending and forming and oxy fuel cutting.
When mixed together in correct proportions within a handheld torch or blowpipe, a relatively hot flame is produced with a temperature of about 3,200 deg. A stepbystep guide welding is a delicate art, but once you learn it, ordinary steel becomes a blank canvas for invention. There are still quite a few purists out there who swear by it for oxy fuel gas welding airframes. The welding metal should be of special wire, and in no case should the flame be held on to the weld until a foam is produced, as such foam is an indication that the metal is being burned. This specification prescribes requirements for the classification of bare magnesium all welding electrodes and rods for use with the gas metal arc, gas tungsten arc, oxyfuel gas, a. Spread your welds out to control heat and voltage on thin sheet metal like body panels.
French engineers edmond fouche and charles picard became the first to. Pure oxygen, instead of air, is used to increase the. However, it is still widely used for a variety of applications. The fuel gas commonly acetylene, when mixed with proper proportion of oxygen in a mixing chamber of welding torch, produces a very hot flame of about 57005800f. Arc welding is a process that uses an electric arc to join the metals being welded.
Oxyfuel gas welding, 7th edition technical book shop. Keep the gun a constant distance from the puddle about half an inch. The use of oxyfuel equipment is a necessity for teacher demonstrations and student practice as well as for parts identification. Further information can be obtained in the welding institute technical note 7 safety in welding and cutting. Oxyacetylene welding is a very common welding process that dates back to 1890s, wherein oxygen and acetylene are used as the two major welding gases. Designed as a workbook the text provides written and step by step task procedures to aid in learning the practice of welding. Oxyfuel gas welding introduces students to the fundamentals of gas welding and cutting processes with simple, easytounderstand instruction. Oxyfuel equipment is versatile, lending itself to welding, brazing, brazewelding, silver soldering, metal. Welding is an excellent job prospect, says the occupational outlook handbook. Tig welding 10 plasma welding 17 welding sheet 18 welding plate 20 welding pipes 22 defects in welds 24 the right gas. Page 162 in welding steel, remember that the welding material should never be added until the edges of the metal to be welded are fused, or molten, at the place where the weld is being made.
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