Welding welding is a materials joining process which produces coalescence of materials by heating them to suitable temperatures with or without the application of pressure or by the application of. Oxy acetylene is one of the oldest and most universally used welding processes. Experience gained from user contact and welding training of crewmembers showed that. Oxyfuel equipment is versatile, lending itself to welding, brazing, brazewelding, silver soldering, metal heating for bending and forming and oxyfuel cutting. Jan 14, 2017 in this video we will discuss about what is oxygen acetylene welding. This book will highlight the welding and cutting processes. Ppt oxyacetylene welding powerpoint presentation free to. This document contains general information about the topic discussed herein. Oxy acetylene welding o 2, c 2h oxyacetylene welding is a gas welding process.
When mixed together in correct proportions within a handheld torch or blowpipe, a hot flame is produced with a temperature of about 3,200c. Mostly oxy acetylene gas is used for all general purpose of welding. Harbor freight tools quality tools at discount prices. Oxygen acetylene welding easily understand youtube. The other equipments serves the same function as in case of oxyacetylene gas welding. Oxyacetylene welding oaw the oxyacetylene welding process uses a combination of oxygen and acetylene gas to provide a high temperature flame. Oxy acetylene gas welding process is widely used commercially for welding of ferrous and nonferrous metals particularly for thin sections up to 6 mm thick.
Workshop technology notes djj1043 workshop technology ahmad firdaus zawawil anwar. However, it is still widely used for a variety of applications. The edges of the pipes are bevelled at 70 and butted together with a gap of approximately 2. This document is not an application manual and does not contain a complete statement of all factors pertaining to that topic. Oxyacetylene and oxy mapp methylacetylenepropadiene welding are two types of gas welding processes. Before going to gas welding let me discuss what is welding so, welding is defined as a fabrication process that joins materials, usually metals or.
Cutting with the oxyfuel process is just the opposite from of welding. A mixture of oxygen and acetylene, burns as an intense focussed flame. Provided are a list of welding terms, the tools needed, safety precautions, and the benefits of oxy acetylene welding. Be sure cylinders are fastened with a chain as a protection against falling or rolling. Oxyacetylene welding is a very common welding process that dates back to 1890s, wherein oxygen and acetylene are used as the two major.
It comprises oxygen and acetylene gases stored under pressure in. Gas welding is also named as oxyfuel gas welding ofw. Oxy fuel welding commonly called oxyacetylene welding, oxy welding, or gas welding in the u. By the end of this unit each apprentice will be able to. The fuel gas selection is depends on the welding material. Applications neutral flame fusion welding of steel and cast iron. Gas cylinder is filled either by oxy acetylene gas, hydrogen gas, natural gas or other flammable gas. It is a welding process that melts and joins the metals by heating them with a flame caused by a reaction of fuel gas and oxygen. Oxyacetylene, commonly known as oxyfuel, is one of the. Usually fusion welding uses a filler material to ensure that the joint is filled. In this setting, the maximum flame temperature is about 3200 c, and the flame has a reducing effect on the work area. Oxy acetylene cutting safety in agriculture osha standard 1910.
Oxy fuel equipment is versatile, lending itself to welding, brazing, braze welding, silver soldering, metal heating for bending and forming and oxy fuel cutting. Oxyfuel welding, heating and cutting process manual installation and operation instructions before installing or operating, read and comply with these instructions controls corporation of america 1501 harpers road virginia beach, va 23454 to order call 18002250473 or 7574228330 fax 7574223125 april 2001 supersedes. Thus oxy acetylene welding enables accurate control of both the size and type of flame which is very important for joining nonferrous materials and metals of small section. Manual oxyflame cutting of a round hole or disc can be made easier using a. Oxy acetylene, equipment,types of flames,applications by mohammed shafi november 7, 2018 march 21, 2020 gas welding process pdf. Pdf comparison between oxyhydrogen gas welding and. In oxy acetylene welding, oxygen and acetylene gas are combined in a torch handle to produce a flame that burns at over 6000 degrees fahrenheit. Describe the components and their function of oxyacetylene welding plant. Benefits of learning oxy acetylene welding and cutting for teachers 11th. This lesson will show you the basics of welding process and working principle of welding, types of welding. The chemical action of the oxy acetylene flame can be adjusted by changing the ratio of the volume of oxygen to acetylene, using the valves on the torch or blowpipe.
Oxyacetylene welding by matt scott introduction oaw is a welding process that heats the base metal with a controlled mixture of acetylene and oxygen gas. Guidelines are given on the principal health and safety considerations for oxyacetylene welding to ensure safe welding practices. Identify and assemble oxy acetylene station gauges. Oxyacetylene welding is simple in concept two pieces of metal are brought together, and the touching edges are melted by the flame with or without the addition of filler rod. Leaving cert engineering welding notes welding is a fabrication process that joins materials, usually metals. Safety in gas welding, cutting and similar processes page 3 of 11 preventing fire from heat, sparks, molten metal or direct contact with flame the flame from an oxy fuel gas torch often called a blowpipe is a very powerful source of ignition. Manufacturing technology 1 pdf notes mt 1 notes pdf. Refer to the victor acetylene cutting tip chart in appendix a or welding nozzle flow data in appendix b for the recommended pressures. Welding, brazing, cutting and heating brazing sheet metal select the proper welding nozzle, brass rod size and flux. Video an introduction to gas welding oxyacetylene oxyacetylene gas welding is commonly used to permanently join mild steel. In this process coalescence or bond is produced by heating with the gas flame obtained from the combustion of acetylene with oxygen.
Oxygen and acetylene gas are burned at the tip of the nozzle on the welding torch. Oxy acetylene welding, brazing, cutting and heating lesson. Unit 9 oxyacetylene welding plant and safety duration 6. It comprises oxygen and acetylene gases stored under pressure in steel cylinders.
Oxy acetylene equipment is portable and easy to use. Identify and safely assemble regulators, hoses, torch and cylinders identify and understand the function of the component parts of the welding torch. This temperature provides enough heat to melt most metal. Cylinder of acetylene or mapp gas cylinder of oxygen. Open the valve on the acetylene cylinder no more than threefourths of a turn so it can be closed quickly in case of emergency.
Describe the hazards and safety features of oxyacetylene welding plant. Leak check and purging of heatingweldingbrazing torch. The oxyacetylene process produces a high temperature flame, over 3000 degrees c, by the combustion of pure oxygen and acetylene. Welding welding is a materials joining process which produces coalescence of materials by heating them to suitable temperatures with or without the application of pressure or by the application of pressure alone, and with or without the use of filler material.
Safety in gas welding, cutting and similar processes. Gas welding and cutting oxyfuel welding, commonly referred to as oxy welding or gas welding is a process of joining metals by application of heat created by gas flame. For the welding of steel, the oxyacetylene flame may be adjusted so that with a mixing ratio of about 1. Proper eye protection must be wornoperate only with instructors permission and after proper instructions have been received. Normally these cylinders have maroon line to indicate it. I really enjoy oxy fuel welding, i find it very relaxing. The process is also useful for a large amount of repair work. Oxy fuel gases oxy fuel gases numerous gases are available for use in oxy fuel operations.
For the welding of steel, the oxy acetylene flame may be adjusted so that with a mixing ratio of about 1. Harbor freight buys their top quality tools from the same factories that supply our competitors. Future metal workers will learn about types of flames. Oxyfuel gas cutting and welding operation of oxyfuel torches involves oxygen and flammable gases under pressure, open flames, flying slag and hot metal, meatl fumes and combustion products. This is often done by melting the workpieces and adding a filler material to form a pool of molten material that cools to become a strong joint, but sometimes pressure is used in conjunction with heat, or by itself, to produce the weld. 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. The cylinder is then baked, and the mixture forms a porous, spongelike mass. The heat from the torch allows for the melting and mixing of the base metal and filler metal to form a solid weld. Oxyfuel welding commonly called oxyacetylene welding, oxy welding, or gas welding in the u. Manufacturing technology 1 notes pdf mt 1 pdf notes book starts with the topics joining processes,classification of welding process,fusion welding,plastic welding,gas welding technique, oxy acetylene welding,friction welding,friction stir welding,brazing methods. Oxidation of the joint faces is prevented by an envelope made up of the products of combustion. When welding a patch panel or fender flare on a car, i use either oxy acetylene gas welding or wirefeed mig welding, in that order of preference. Adjust the oxygen regulator screw by turning it clockwise until the recommended pressure is achieved.
Aug 02, 2018 oxy acetylene welding it is the common method of gas welding. The important point to note is that the reaction occurs at a lower temperature. Oxy acetylene welding principle of operation when acetylene is mixed with oxygen in correct proportions in the welding torch and ignited, the flame resulting at the tip of the torch is sufficiently hot to melt and join the parent metal. Before you can weld or cut metal, you need to know the basics. Gas welding oxy acetylene welding oxy hydrogen welding. In bulletstyle notes, it covers how optic fibers work, their structure, different types, and their use. Acetylene acetylene is the primary fuel for oxy fuel welding and is the fuel of choice for repair work and general cutting and welding, acetylene generator as used in bali by a reaction of calcium carbide with water. Trade of metal fabrication phase 2 module 2 unit 6 unit 6 8 module 2 thermal processes unit 6 oxy acetylene welding duration 4 hours learning outcome. It is extremely versatile, and with enough skill and practice you can use this type of welding for virtually any metal. Fusion weldinga welding process that joins metals by heating them to be a melting point and allowing them to fuse or flow together. In fusion welding or non pressure welding, the material at the joint is heated to molten state and allowed to solidify. The chemical reaction between acetylene and oxygen is exothermic in nature.
In preparing these chapters, the author has had in mind his own early experience in oxyacetylene welding, and recognizes that, at best. After the acetylene cylinder is built, a wet cement mixture of various materials, such as asbestos or charcoal, is packed into the cylinder. Oxygenacetylene welding, or gas welding, is a process which relies on combustion of oxygen and acetylene. 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. For welding the mild steel, open oxygen torch valve and adjust to neutral flame. Correct flame adjustment is essential for the production of sound welded joints by the oxy acetylene process. Safety for oxyacetylene welding thompson rivers university. Oxyacetylene flame may also be used for all types of brazing.
The chemical action of the oxyacetylene flame can be adjusted. Oxygen acetylene welding, or oxy acetylene welding, is a process for joining metals that was introduced in 1903 by thomas wilson. Oxy acetylene welding leaving certificate engineering notes. All fusion welding processes have three requirements. Interpass heatingapplication of heat to a base metal during a welding process. Oxyacetylene welding, commonly referred to as gas welding, is a process which relies on combustion of oxygen and acetylene. When we come to oxygen cutting, we must consider the pure oxygen jet as a second tool, working handinhand with the flame. Competencies given a functional oxy fuel gas unit, instruction and demonstration of use, each student will be able to. Fundamentals of gas cutting and welding ced engineering. Temperatures from the combustion of oxygen o2 gas and ethyne, or acetylene c2h2 gas can reach 3,340 degrees celsius, which is hot enough to cut through steel.
The oxy acetylene welding process combines oxygen and acetylene gas to provide a high temperature flame for welding. How to master the fiery art of gas welding requiring a 6300degree open flame and combustible materials, gas welding has fallen out of favor. Typical applications of the process include fabrication of ventilation and airconditioning ducts and repair of vehicles. To produce only the flame, we use a welding torch, fitted with the appropriate size welding head or tip. Jan 25, 2017 oxy acetylene welding is a very common welding process that dates back to 1890s, wherein oxygen and acetylene are used as the two major welding gases. Seminar on gas welding seminar report pdf download. French engineers edmond fouche and charles picard became the first to develop oxygenacetylene welding in 1903. Gap wirea wire used for correct spacing of butt joints. We cut out the middleman and pass the savings to you.
In this process, mostly oxy acetylene gas is used as fuel gas. Oxyfuel oxyacetylene welding a guide to gas welding. Oxygen and acetylene together in a flame provide the heat necessary to melt most. To produce only the flame, we use a welding torch, fitted with the appropriate size welding. This process can be done with or without help of filler material. Oxyhydrogen welding produce oxyhydrogen gas on demand and gas cylinders is no longer required. The equipment is cheaper than most other types of welding rigs e. Careless use of oxy fuel torches has caused many fires. In this video we will discuss about what is oxygen acetylene welding. Oxy acetylene welding can used for welding of wide range of metals and alloys. The spark lighter is used to ignite the oxyacetylene mixture at the tip of cutting torch.
Oxy acetylene welding, brazing, cutting and heating unit. This heat is further used to melt interface surfaces of welding plates which are held together to form a joint. Tig welding is great, but few doityourselfers have a tig welder, so well stick with the first two. Oxygenacetylene welding, or gas welding, is a process which relies on. Definition, equipment, flames, working, types, advantages, disadvantages, applications in detail note. This welding on the web box will appear throughout the manual. Following the inspection and installation of the regulators and hoses, the checklist is divided into two sections. This is a special welding technique used for butt welding of steel pipes. Gas welding is my first choice because the metal stays fairly soft and workable, and metal. Oxyacetylene oa welding is one of the many types of welding supported by the prl. 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. If you have your own study notes which you think can benefit others, please upload on learnpick.
Apr 16, 2017 gas welding is a type of liquid state welding process in which fuel gases burns to generate heat. Oxy acetylene welding ofw fundamentals pressure settings. While welding, the pipes are rotated constantly so as to weld the seam in the horizontal position only. Oxyacetylene and oxy mapp methylacetylenepropadiene welding are two types of gas welding proc. In fact, the oxyacetylene flame burns at 6000 f, and is the only gas flame that is hot enough to melt all commercial metals. Chemical reactions and temperature distribution in a neutral oxyacetylene the secondary combustion is also called the protection envelope since co and h2 here consume the o2 entering from surrounding air, thereby protecting. Under pressure, dissolved acetylene is safe, but free acetylene over 15 psi pressure is unsafe. The real tool of the oxyacetylene welding process is the flame, not the torch. At the end of the articles you will find the download pdf button that you can easily download pdf.
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