Reasonable care is taken in the compilation and publication of this textbook to insure authenticity of the contents. May 10, 2018 schematic illustration of the shielded metal arc welding process the electrodes are in the shapes of thin, long rods that are held manually. It involved a bare metal rod with no flux coating to give a protective gas shield. Safety welding techniques joint preparation proper machine set up all other course materials will be provided.
The heat generated melts a portion of the electrode tip, its coating and the base metal in the immediate arc area. In spite of the use of welding shield an operator may develop eye pain if he welds continuously for long shifts say 6 to 10 hours. Shielded metal arc welding is one of worlds most popular welding processes, accounting for over half of all welding in some countries. Demonstrate surfacing weld horizontal position e6010e7018 guidelines for success assessment plan. Welding certification preparation course information dates.
Essential factors in gas shielded metal arc welding. Pdf shielded metal arc welding smaw part a agricultural. This installation, operation, and maintenance of arc welding equipment and the. This module is an exploratory and introductory course which leads you to shielded metal arc work national certificate level ii nc ii1. Shielded metalarc welding smaw is the simplest and used for many joining processes. This career certificate is for students wishing to concentrate their studies on the shielded metal arc welding process, procedures, and techniques. Shielded metal arc welding smaw also known as stick welding is an arc welding process which produces coalescence by heating with an electric arc between a covered metal electrode and the surface of the base metal. Shielded metal arc welding smaw, or manual metal arc welding was first invented in russia in 1888.
Parametric optimization of shielded metal arc welding. Shielded metal arc welding smaw, also known as manual metal arc welding mma or mmaw, flux shielded arc welding or informally as stick welding, is a. At the conclusion of the course, you will have the opportunity to attempt one american welding society smaw certification. Monday, june 24, 2019 wel1 shielded metal arc welding syllabus 3. Guidelines for shielded metal arc welding smaw miller welding. Shielded metal arc welding smaw course objective shieldedmetal arc welding, generally known as stick or arc welding, is the most basic of all welding types and is the easiest to master. Shieldedmetalarcweldingsmaw metal fabricating glossary. Pdf optimization of shielded metal arc welding smaw process. The need to chip away slag and replace spent electrodes make this welding process one of the less efficient welding methods.
Demonstrate the safe and correct set up of the smaw workstation 3. Welcome to the course of shielded metal arc work smaw. Because the electrodes used in the shielded metal arc welding process are consumable, it is necessary for the person performing the welding to periodically replace the electrode. May 02, 2020 shielded metal arc welding is the process of joining two metal pieces using a flux covered electrode which is melted in an electric arc and becomes a fused part of the pieces being welded. Exothermically assisted shielded metal arc welding adding exothermic flux to smaw electrodes enhances heat generation and increases melting rate by j.
Demonstrate surfacing weld flat position e6010e7018 5. An electric current, in the form of either alternating current or direct current from a welding power supply, is used to form an electric arc between the electrode and. Shielded metal arc welding smaw is often referred to as stick welding. Relate smaw electrode classification with base metals and joint criteria 4.
Tuesday, january 07, 2014 wel1 shielded metal arc welding syllabus guidelines for success assessment plan assessment is an integral part of the educational process at washburn tech and accurate feedback is an important tool in continuously improving. Guidelines for shielded metal arc welding smaw pdf. Oct 31, 2018 shielded metal arc welding smaw is a fusion welding process that uses a consumable, fluxcoated electrode to create an arc between the electrode and the work piece. This paper presents an expert system to help plan and train shielded metal arc welding smaw operations. October 7, 2015 this safety data sheet sds is for welding consumables and related products and may be used to comply with oshas hazard communication standard, 29 cfr 1910. Shielded metal arc welding unit 11 goodheartwillcox. Abstract the shielded metal arc welding smaw process is an arc welding process which produces coalescence of metal by heating them with an arc between a covered metal electrode and the work. A generalised electrical circuit for smaw is shown in fig. Shielded metal arc welding smaw or the conventional arc welding process is particularly dominant in structural joints. The welding process can use either alternating current ac or direct current dc. Welding procedure specification for shielded metal arc welding of steel pipe and fittings. Shielded metal arc welding smaw, also known as manual metal arc welding mma or mmaw, flux shielded arc welding or informally as stick welding, is a manual arc welding process that uses a consumable electrode covered with a flux to lay the weld an electric current, in the form of either alternating current or direct current from a welding power supply, is used to form an. Cmq smaw welding shielded metal arc welding youtube. Smaw is governed by a large variety of factors, and so it is very difficult to gain expertise in smaw procedures.
The composition and quantity of both are dependent upon the metal being welded, the process, procedures and. Execute corrective actions to repair surface flaws on welds and base metals 7. The essential factors in gas metal arc shielded welding provides information to assist welding personnel study the arc welding technologies commonly applied in gas shielded metal arc welding. Shielded metal arc welding smaw has been the welding industrys mainstay and heavily used in construction. Shielded metal arc welding mcgill university school of. The electrodes rods that are used have a coating called flux. Aug 18, 2016 shielded metal arc welding or smaw is the preferred welding process used when the items to be joined are composed of iron including ductile iron and cast iron or different kinds of steels including stainless steel and carbon steel. Once started, the process continues until the electrode is spent, allowing the operator to manage multiple gravity welding systems. This welding process can use either alternating current ac or direct current dc. The development of coated electrodes did not occur until the early 1900s when the kjellberg process was invented in sweden and the quasi arc method was introduced. Shielded metal arc welding smaw, also known as manual metal arc welding. Describe how to select shielded metal arc welding equipment and supplies. Tuesday, january 07, 2014 wel1 shielded metal arc welding syllabus guidelines for success assessment plan assessment is an integral part of the educational process at washburn tech and accurate feedback is an important tool in continuously improving the institutions technical programs. Describe the procedures and techniques for shielded metal arc welding.
There is not an adjustment to the arc volts on most manual arc welding machines. Download guidelines for shielded metal arc welding smaw book pdf free download link or read online here in pdf. Set up for shielded metal arc welding operations 5. Stick welding can be used for manufacturing, construction, and repairs, well suited for heavy metal size 4 millimetres upwards. In smaw, it is necessary to make the feeding movement in order to maintain a constant arc length. Students will master a variety of welding competencies including oxyfuel cutting and welding including shielded metal arc welding. The shielded metal arc welding smaw stick process generates an arc between a fluxcoated consumable electrode and the workpiece. This article will describe the use of fluxcoated welding rods and a simple, transformer type cracker box welding machine. For example, you might consider switching to shielded metal arc welding smaw to gas metal arc welding gmaw with a solid or metal coated wire, or opt to use lowmanganese filler metal. During the welding process the flux forms a gas shield that protects the weld puddle from atmospheric contamination. One of the most common types of arc welding is shielded metal arc welding smaw, which is also known as manual metal arc welding mmaw or stick welding.
Guidelines for shielded metal arc welding smaw pdf book. You will learn more about shielded metal arc welding in. More than 50% of industrial and maintenance welding currently is performed by this welding process. Set up components and accessories of a complete shielded metal arc welding system 4. Shielded metal arc welding smaw, also known as manual metal arc welding mma or mmaw, flux shielded arc welding or informally as stick welding, is a manual arc welding process that uses a consumable electrode covered with a flux to lay the weld. Read online guidelines for shielded metal arc welding smaw book pdf free download link book now. Exothermic flux additions to smaw electrodes can assist in the gen eration of heat and increase the rate of. Guidelines for shielded metal arc welding smaw warning this document contains general information about the topics discussed herein.
Molten metal travels from the electrode via the electrical arc and is deposited into the work piece. The main advantages of shielded metal arc welding are that highquality welds are made rapidly at a low cost. The first lesson of welding learn to run a straight bead everlast powertig 200dv duration. Electrode size is nominated by diameter of core wire and is determined by the amperage. Smaw is a wellestablished form of welding used extensively in commercial and industrial applications around the world. Oct 23, 2015 it serves as an automated version of the traditional shielded metal arc welding process, employing an electrode holder attached to an inclined bar along the length of the weld. Build pads of weld beads with selected electrodes in the flat. October 7, 2015 welding fumes and gases cannot be classified simply. Shielding metal arc welding smaw is often referred to as stick welding. Shielded metal arc welding smaw gas tungsten arc welding gtaw or tig. In this welding operation, an electric arc is generated by touching the tip of a coated electrode against the workpiece and withdrawing it quickly to a distance sufficient to.
The electrodes, also called rods, use a claylike coating called flux to provide a gas shield and a coating to protect the weld puddle from the atmosphere. Shielded metal arc welding smaw is a fusion welding process that uses a consumable, fluxcoated electrode to create an arc between the electrode and the work piece. A shielded metal arc welding expert system sciencedirect. Demonstrate proper electrode selection and use based on metal types and thicknesses 5. Welding procedure specification shielded metal arc weldingsmaw. Shielded metal arc welding in shielded metal arc welding, it is not sufficient to follow a predefined trajectory over the groove, as in the gas metal arc gma and flux cored arc fca processes, where wire feeding is automatic. Shielded metal arc welding smaw nc ii technical education and skills development authority. Using a file to measure hardness rockwell file reaction type of steel brinell. East service road, south superhighway, taguig city, metro manila table of contents. Shielded metal arc welding is one of the most widely used processes, particularly for short welds in production, maintenance and repair work, and for field construction. Applying shielded metal arc welding smaw techniques. Engine driven welding power supplies are widely used for shielded metal arc welding process in.
Program standards are aligned to the requirements of. One routine use of smaw is for joining pipe of various thicknesses and diameters. Because of its versatility and simplicity, it is particularly dominant in the maintenance and repair industry, and is heavily used in the construction of steel structures and in industrial fabrication. Introduction to shielded metal arc welding youtube. Corrosionpedia what is shielded metal arc welding smaw. This video explains how the shielded metal arc welding stick, smaw process works, and gives you an introduction on how to stick weld for beginner welders. It covers 4 common competencies in that a grade 7grade 8 technology and livelihood education tle student like you ought to possess. Make 2g, 5g, and 6g groove welds on carbon and stainless steel pipe 8. An electric current, either alternating current or direct current, forms electric arc between the electrode and the metals to be joined. This document is not an application manual and does not contain a complete statement of all factors pertaining to those topics. The welding course of study provides students with an opportunity to learn about the industry as it relates to welding. Shielding is obtained from decomposition of the electrode covering. This could mean changing consumables away from heavier wire, hilbert says.
The shielded metal arc welding smaw manual arc welding process is. Shielded metal arc welding smaw, also known as manual metal arc mma welding or informally as stick welding, is a manual arc welding process that uses a consumable electrode coated in flux to lay the weld. Dealing with welding fumes american welding society. Take a close look at your process and what youre using. The equipment is relatively simple, inexpensive, and portable. All books are in clear copy here, and all files are secure so dont worry about it.
Shielded metal arc welding is the process of joining two metal pieces using a flux covered electrode which is melted in an electric arc and becomes a fused part of the pieces being welded. Welding procedure specification shielded metal arc. Welding procedure data sheets shall require a new welding procedure specification and or welding procedure data sheet. It serves as an automated version of the traditional shielded metal arc welding process, employing an electrode holder attached to an inclined bar along the length of the weld. Smaw is well known for its versatility because it can be used in all welding positions, and in both production and repair welding situations.
682 623 1424 545 23 863 980 1109 1321 202 509 179 444 228 1146 559 56 453 517 202 911 1110 1149 831 606 1291 1563 1388 940 441 1339 1508 1350 1367 665 1212 563 918 333 1490