We can divide the welding processes into two major groups. A flowchart is a graphically representation of the process, algorithm or the stepbystep solution of the problem. Soldering copper pipe sheet metal fabrication figure 1 different types of soldering soldering is a common practice for assembling electrical components and. Welding and joining guidelines the hastelloy and haynes alloys are known for their good weldability, which is defined as the ability of a material to be welded and to perform satisfactorily in the imposed service environment. The purpose of the welding handbook for maritime welders is to provide guidance in modern welding and related processes and to provide the welder with a source of practical information on the right solution to specific onboard welding problems. The most popular processes are shielded metal arc welding smaw, gas metal. E i2rt where e is the heat energy, i is the current, r is the electrical resistance and t is the time that the current is applied. Flat welding, horizontal welding, vertical and overhead welding, groove weld, edge. Further, need for edge preparation and the rationale for selection of suitable groove design have also been presented. There are several forms of resistance welding, including spot welding, seam welding, projection welding, and butt welding. Welding is of following types authorstream presentation. Dnvglrushippt1ch3 documentation and certification types. Contents under pressure splash hazard flying objects particles electrical work types of face protection face shield welding shield donning face ppe safety goggles or goggles must always be worn under a face shield. The service performance of the welded component should be given.
Watch videos, read the latest industry news, learn how to get your certifications and get free stuff. Pdf files with special features may only be submitted provided that i the special features are supported by the societys production system and ii the society has accepted the use of such special features documents shall be in monochrome black and white unless otherwise required or necessary. In welding, it is possible to use filler materials with higher levels of manganese to overcome the formation of low melting point iron sulfide. Identify the different types of joints and welds explain the terms and symbols used for groove and fillet welds describe the different welding positions recognize the factors involved in the selection of joints. This handbook covers various welding processes, weld types, different electric arc welding processes, safety in electric arc welding, welding electrodes, oxy acetylene gas welding, its equipment, safety in gas welding filler rods, oxy acetylene gas cutting etc. Tungsten also called wolfram is a metal with a fusion point of more than 3300oc, which means more than double the fusion point of the metals which are usually welded. 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.
Introduction to welding technology page 3 of 9 of a welding rod is to supply filler metal to the joint. Plastic welding in plastic welding or pressure welding, the pieces of metal to be joined are heated to plastic state and then forced together by external pressure. Download types of welding joints ppt from here conclusion. Chapter 1 introduction to types and identification of metal. The welding process welding is a process for joining or fastening two pieces of similar metals workpieces by melting and fusing 1 the base metals being joined and 2 the filler metal applied. Once goggles are in place, position face shield over face and secure on brow with headband. Welding quality control flux core arc welding fcaw gasmetal arc welding gmaw gastungsten arc welding gtaw shielded metal arc welding smaw plasma arc cutting operations soldering, brazing, braze welding, wearfacing gas welding gas cutting introduction to welding basic heat treatment introduction to types and identification of metal. Welding and joining guidelines haynes international. Mar 29, 2011 dear all, pl help me to forward the welding safety ppt or photographs of welding accident due to non use of ppe. Plastic welding or pressure welding and fusion welding or nonpressure welding. Welding is usually performed on parts made of the same metal, but some welding operations can be used to join dissimilar metals. The sttir is the ideal solution for welding parts with threedimensional weld lines quickly in highvolume production. This type of filler metal is often used for gas welding.
Welders visual inspection handbook may 20 note this handbook is not intended to serve as a work procedure or to replace any existing procedures. Gas tungsten arc welding gtaw or tungsten inert gas tig welding. Classification of welding defects one of the iiw documents classifies all welding defects into six groups according to their appearance. Resistance welding and types of resistance welding in hindi 10. Each of the above type of welding can be further classified depending on other micro level characteristics. The following briefly presents different types of iron and steel made from iron. Therefore, it is recommended that precautions be taken to keep exposures as low as possible. Welding power supply shielding gas water plasmaforming gas plasmaforming gas water shielding gas cathode thoriated w direction of travel weld pool plasma stream solidified weld workpiece h.
Your primary concern as a steelworker will be gas and arc welding, the difference being in. Arc welding shielded metal arc welding smaw gas metal arc welding gmaw carbon arc welding flux cored arc welding fcaw submerged arc welding saw electroslag welding electrogas welding plasma welding stud arc welding. This method is probably the most popular type of welding process since it includes many of the most popular types of welding, such as mig, tig, and stick welding. Ionizing radiation is produced by the electron beam welding process and during the grinding pointing of thoriated tungsten electrodes for gas tungsten arc welding gtaw process. Applications certified robotic arc welder application. Arc welding is divided into consumable and nonconsumable electrode methods.
Types of welding manufacturing technology mechanical. Chemical goggles are generally stronger than safety glasses and are used for higher impact, particle and chemical splash protection. The adobe flash plugin is needed to view this content. It is solely intended to provide basic information about weld conditions, weld gauges, symbols and weld terms. Introduction welding is the process of coalescing more than one material part at their surface of contact by the suitable application of pressure or heat or both at the same time.
Types of eye protection goggles chemical laser welding chemical goggles protect your eyes, eye sockets, and the facial area immediately surrounding the eyes from impact, dust, and splashes. Manual welding with equipment that automatically controls one or more of the. After completing this learning unit you should be able to. The electrode and the work are part of an electric circuit. Tungsten also called wolfram is a metal with a fusion point of more than 3300oc, which means more than double the fusion point of. The art and science of joining metals by using the intrinsic adhesive and cohesive forces of attraction that exist within metals. Shielded metal arc welding smaw, also known as manual metal arc welding, mmaw. Relevant sketches are given wherever required to make the subject interesting. Welding with equipment that requires manual adjustment of the equipment controls in response to visual observation of the welding, with the torch, gun or electrode holder held by a mechanized device. Source extraction local exhaust is a mechanical device used to capture welding fume at or near the arc and filter contaminants out of the air.
Common welding types arc welding aw oxyfuel gas weldingofw resistance. Shielded metal arc welding, which is also known as stick welding, is the most widely used process. Welding is a fabrication or sculptural process that joins materials, usually metals or thermoplastics, by causing coalescence. Arc welding is a type of welding that uses a welding power supply to. In plastic welding or pressure welding process, the pieces of metal to be joined are heated to a plastic state and then forced together by external pressure. Experience gained from user contact and welding training of crewmembers showed that documentation aimed specifically at on board welding solutions was needed. Shielded metal arc welding employs the heat of the arc to melt the base metal and the tip of a consumable covered electrode. A free powerpoint ppt presentation displayed as a flash slide show on. Welding health and safety ss832 march 2015 page 4 gas metal arc welding gmaw or mig metal inert gas welding is an arc welding process wherein coalescence is produced by heating with an arc between a continuous filler metal electrode typically a steel alloy wire and the work. The second type of centerline cracking is known as bead shape induced cracking. There are four major types of gas metal arc welding, depending on the shielding gas or type of metal transfer used. The type of welding process used is related to the specific application.
Download as ppt, pdf, txt or read online from scribd. Pig iron comparatively weak and brittle with limited use. From pig iron, many other types of iron and steel are produced by the addition or deletion of carbon and alloys. Osha hexavalent chromium standards onehalf of the pel or if there is a change, for example to the workplace, work practices, materials or processes involved.
In electricarc welding, the term electrode refers to the component that conducts the current from the electrode holder to the metal being welded. Welding includes joining methods as diverse as fusion welding, forge welding, friction welding, braze welding, brazing, soldering and explosion welding. Fusion welding in fusion welding or non pressure welding, the material at the joint is heated to molten state and allowed to solidify. This lesson will show you the basics of welding process and working principle of welding, types of welding.
Two types of filler metals commonly used in welding are welding rods and welding. This is often done by melting the workpieces and adding a filler material to form a pool of molten material the weld pool that cools to become a strong joint, with pressure sometimes used in conjunction with heat, or by itself, to produce the weld. Refer to local procedures for technical or other specific data. Welding can be done without the use of a filler metal by the use of heat energy alone. This sample was created in conceptdraw diagram diagramming and vector drawing software using the flowcharts solution from the diagrams area of conceptdraw solution park. Ppt introduction to welding technology powerpoint presentation free to view id. Full details about the various welding processes can be found in the cwb. Now after studying all the different types of welding joints, we can decide what joint to use when we have different requirements. This is very process efficient because canit use high currents from 500 to 0 amperes, thereby obtaining deeper weld penetration into the. Sttir laser welding is a fast, fourstep process 1 as two component parts are brought together under a specific force, a beam of laser light is generated. Arc welding is a fusion welding process in which the heat required to fuse the metal is obtain from the electric arc between the base metal and an electrode.
Fixed automation welding is often applied to welding equipment performing dedicated movements on a weld joint that is highly repeatable in shapes such as circle, arc and longitudinal seams 8. Connects to 1 phase 230v 5060hz readably available power point. This includes welding equipment and machines, including mig welding, tig welding, and arc or stick welding. Welding, soldering, brazing max akhterov zettl group safety talk 110706 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.
Rules for classification and construction ii materials and. Two types of welding fusion welding melting base metals arc welding aw heating with electric arc resistance welding rw heating with resistance to an electrical current oxyfuel welding ofw heating with a mixture of oxygen and acetylene oxyfuel gas other fusion welding electron beam welding and. The welding processes differ in the manner in which temperature and pressure are combined and achieved. Joint type check the boxs to indicate the joint type. Experience gained from user contact and welding training of crewmembers showed that.
This circuit begins with the electric power source and includes the welding cables, an electrode holder, a workpiece connection, the workpiece. Types of welding position this chapter presents common types of welding position and various difficulties associated with them. Now we are in a situation where we can decide what joint to use when we need stronger welds. The arc welding is a fusion welding process in which the heat required to fuse the metal is obtained from an electric arc between the base metal and an electrode. Basically welding may be classified into three types. In addition to welding, other ancillary joining methods are discussed, including soldering and brazing. Rules for classification and construction ii materials and welding 3 welding 2 design, fabrication and inspection of welded joints. The welding of stainless steels 4 an excellent metallurgical quality, with a precise control of penetration and weld shape in all positions.
Gtaw or tig gas tungsten arc welding or tungsten inert gas or heliarc welding is a process in which the joining of metals is produced by heating therewith an arc between a tungsten non consumable electrode and the work. Many different energy sources can be used for welding including gas flames, electric arcs, electric resistance, lasers, electron beams, friction, molten metal baths and ultrasound. A welding procedure data sheet wpds is a document, used in conjunction with a. International journal of engineering research and general. Ppt arc welding powerpoint presentation free to download id. Hindi welding process and types by jyoti shinde unacademy. This could be accomplished using some type of quiz competition between groups of students. Welding, brazing, soldering does not include mechanical fastening such as bolts, rivets, screws, etc.
Scribd is the worlds largest social reading and publishing site. The electricityconsuming device the key component of the arc welding apparatus is the power source. Good weld appearance with smooth weld metal wetting. Electrical consumption from the approximately 110 000 to 000 arc welding machines in use in canada is estimated at 100 gwh a year. Accessibility for welding strength requirements cyclic or static loading material thickness welding process to be used material type code requirements cost side note. The most common types of welding are resistance welding rw, oxyfuel gas welding ofw, and arc welding aw. Tig welding method and application tig welding definition the designation tig comes from usa and is an abbreviation of tungsten inert gas. Welding with equipment that requires only occasional or no observation of the welding. Some forms of these metals are known or suspected to cause lung cancer in processes other than welding, asthma has also been reported. In gas shielded arc welding, both the arc and the molten puddle are covered by a shield of inert gas.
Steelworker advanced will present additional information about their properties. Welcome to welding types, this site about welding is to provide information and welding tips for all of the different types of welding. We recommend that you download this pdf document and assignment. Welding jobs, training, schools, advice and resources. This led to the development of the first welding handbook for onboard repair and maintenance. The actual powerpoint presentation can be obtained by contacting the outreach for k12 office. Exploring welding jobs and careers, schools, apprenticeships and training prgrams.
The welding process is divided into two major categories. In the past, power sources used transformerrectifier equipment with large stepdown transformers. The five basic types are butt, tee, corner, lap and edge. Heatingmma welding unit 5 manual arc welding duration 36 hours types of flux. The welding machine systems can be flexible and can be adapted to a differing range of weld automation application. Figure 32, shielded metal arc welding, also called stick welding, is the most common welding process. The electric arc is produced when two conductors are touches together and then separated by a small gap of 2 to 4 mm, such that the current continues to flow, through the air. They use various types or combinations of energy to provide the required power. Unfortunately, this concept cannot be applied to contaminants other than sulfur. Welding with equipment that requires only occasional or no observation of the welding and with no manual adjustment of the equipment controls. These welding are also known as liquidsolid welding. It is different to welding in that the parts being joined are not melted and are usually not the same material as the solder.
1368 399 858 451 554 169 1465 490 124 135 1111 1355 227 23 1273 1311 635 410 1081 1390 670 948 1159 533 425 494 129 1440 689 37 126 225 1208 1535 1509 1252 1390 661 633 514 324 675 1336 446 1144 1351 1370 1452