The actual powerpoint presentation can be obtained by contacting the outreach for k12 office. Now we are in a situation where we can decide what joint to use when we need stronger welds. This course manual will provide welding general guidance and safety procedures and should not be used as. Welding with equipment that requires only occasional or no observation of the welding. There are many different types of welding processes and in general they can be categorized as. Welding, brazing, soldering does not include mechanical fastening such as bolts, rivets, screws, etc. Welding can be performed in thousands of combinations regarding position, welding type, welding dimensions, and many other varying components of welding. 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. The welding processes differ in the manner in which temperature and pressure are combined and achieved. The various types of internal welding defects with their causes and remedies are listed below.
An ac or dc power sources, fitted with whatever controls may be needed, is connected by work cable to the workpiece and by an electrode cable to electrode holder of some type, which makes electrical contact with the welding electrode. The art and science of joining metals by using the intrinsic adhesive and cohesive forces of attraction that exist within metals. Scribd is the worlds largest social reading and publishing site. Which arc welding method you use depends mostly on the metal. 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. More commonly called mig welding this welding type is the most widely used and perhaps the most easily mastered type of welding for industry and home use. The welding process is divided into two major categories. Tig welding aluminum fabrication sheet metal forming round hole to rectangle hole transition duration. Pdf seminar underwater welding and inspections researchgate.
The adobe flash plugin is needed to view this content. Fluxcored arc welding fcaw this type of arc welding uses tubular electrodes filled with flux. In electricarc welding, the term electrode refers to the component that conducts the current from the electrode holder to the metal being welded. The electrode and the work are part of an electric circuit. Arc weldingdefinition, types, working, temperature. Experience gained from user contact and welding training of crewmembers showed that. In gas shielded arc welding, both the arc and the molten puddle are covered by a shield of inert gas. There are many types of welding techniques used to join metals. Flat welding, horizontal welding, vertical and overhead welding, groove weld, edge. Records of how often various types of defects occur, must show when changes in welding procedures are necessary, detecting poor welding practices or when the welders or welding.
Ppt stainless steel powerpoint presentation free to download id. Lets understand by an arc welding circuit or working diagram. This type of filler metal is often used for gas welding. Arc welding is divided into consumable and nonconsumable electrode methods. Shielded metal arc welding, which is also known as stick welding, is the most widely used process. These welding are also known as liquidsolid welding. This could be accomplished using some type of quiz competition between groups of students. Find powerpoint presentations and slides using the power of, find free presentations research about types of welding defect ppt. Introduction to welding technology page 3 of 9 of a welding rod is to supply filler metal to the joint.
View and download powerpoint presentations on types of welding defect ppt. Further, need for edge preparation and the rationale for selection of suitable groove design have also been presented. It uses a shielding gas along the wire electrode, which heats up the two metals to be joined. Each of the above type of welding can be further classified depending on other micro level characteristics. 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. Shielding is obtained entirely from an externally supplied gas mixture. 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. Welding is a fabrication or sculptural process that joins materials, usually metals or thermoplastics, by causing coalescence. They use various types or combinations of energy to provide the required power. Plastic welding or pressure welding and fusion welding or nonpressure welding. Covered electrodes for manual metal arc welding of high strength steel. Fusion welding in fusion welding or non pressure welding, the material at the joint is heated to molten state and allowed to solidify. Weld inspection serves as a quality control on fabrication, welding operations and welding procedures. 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.
Shielded metal arc welding employs the heat of the arc to melt the base metal and the tip of a consumable covered electrode. Different types of arc welding tulsa welding school. Pdf the purpose of this seminar is for general knowledge only on how. Welding is usually performed on parts made of the same metal, but some welding operations can be used to join dissimilar metals. Now after studying all the different types of welding joints, we can decide what joint to use when we have different requirements. Accessibility for welding strength requirements cyclic or static loading material thickness welding process to be used material type code requirements cost side note. Basically welding may be classified into three types.
In addition to welding, other ancillary joining methods are discussed, including soldering and brazing. Chapter 1 introduction to types and identification of metal. Ppt introduction to welding technology powerpoint presentation free to view id. The main types of welding used in industry and by home engineers are commonly referred to as mig welding, arc welding, gas welding, and tig welding. 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. 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. This circuit begins with the electric power source and includes the welding cables, an electrode holder, a workpiece connection, the workpiece. Ppt stainless steel powerpoint presentation free to.
What is welding defects types, causes and remedies. 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. Three basic types of oxyacetylene flames used in oxyfuelgas welding and cutting operations. Dmitri kopeliovich welding is a process of joining two metal pieces as a result of significant diffusion of the atoms of the welded pieces into the joint weld region. Due to its diverse nature and the precise needs of the industrial world, a complex collection of symbols has. Types of welding manufacturing technology mechanical. Manual metalarc welding also called shielded metalarc welding smaw. Three basic types of oxyacetylene flames used in oxyfuelgas welding andcutting operations. Types of welding position this chapter presents common types of welding position and various difficulties associated with them. If there is any slag in the weld, then it affects the toughness and metal weldability of the given material. 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. Download types of welding joints ppt from here conclusion. Pdf lecture 2 classification of welding processes i.
Strip wound hoses are known for their increased tensile strength. 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. Different types of stainless steel hoses stainless steel hoses are strip wound or corrugated. Download as ppt, pdf, txt or read online from scribd. Most welders used for mig welding are direct current machines of the constant voltage type. 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. Presentation pdf available december 20 with 6,854 reads. Connects to 1 phase 230v 5060hz readably available power point. Oxyfuel equipment is versatile, lending itself to welding, brazing, braze welding, silver soldering, metal.
Following is an overview of various kinds of arc welding techniques. Azmat ali khan 12mt34 usman nazir 12mt35 naveed imran 12mt28 haseeb ahmad 12mt32 muhammad farhan 12mt qamar zia 12mt10. This method requires a constant voltage and directcurrent power source, and is the most common industrial welding process. Controlling hazardous fume and gases during welding osha. Electric arc welding is the most widely used type of fusion 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.