(Metallurgy) a welding technique in which the parts to be joined are held together under pressure and heat is produced by passing a current through the contact resistance formed between the two surfaces, The Brazilian firm was set up in 1991 by its current president Lucio Maradei to market and sell Luvata brand electrodes and has since became a full service supplier of, Therefore, we propose a simple method of manufacturing of contact electrodes for, The edge of the grating is banded either with a t-shape section or a flat bar with automatic, MTI Welding Technologies Ltd makes special purpose machinery to carry out both friction and. You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary. Resistance welding definition: a welding technique in which the parts to be joined are held together under pressure and... | Meaning, pronunciation, translations and examples All content on this website, including dictionary, thesaurus, literature, geography, and other reference data is for informational purposes only. There are the following types of the resistance welding. Electrical resistance welding (ERW) is a form of pressure welding which utilizes heat generated by electrical resistance of the material along with applied force to hold the pieces together during the welding process. The weld is made by... All resistance welding spot welding, seam welding, projection welding, etc. means the joining of metals by the use of heat generated at the joint by the resistance to the flow of electric current and by the application of pressure. Please tell us where you read or heard it (including the quote, if possible). The electric current can be supplied to electrodes that also apply clamping pressure, or may be induced by an external magnetic field. A method of welding in which the heat required to cause fusion is produced by passing an electric current across the contact between the surfaces to be joined, these being held together by mechanical pressure. n. (Metallurgy) a welding technique in which the parts to be joined are held together under pressure and heat is produced by passing a current through the contact resistance formed between the two surfaces. A distinction is made between butt welding and flash welding, depending on the method of heating. The seam may be a butt joint or an overlap joint and is usually an automated process. These prоcesses differ frоm оther welding prоcesses in the respect that nо fluxes are used, and filler metal rarely used. © 2012 Farlex, Inc. Resistance. The process of fusing one metal to another using combustible gas, covered electrode arcs, and gas-shielded arcs; welding exposes welders to gases, metal fumes, and toxins, and increases risk of lung cancer and mesothelioma Segen's Medical Dictionary. Seam welding definition is - resistance welding in which the weld is made linearly (as between two rollers, a roller and a bar). The electrodes are often disc shaped and rotate … Search resistance welding and thousands of other words in English definition and synonym dictionary from Reverso. Molten metals are forced away by a blast of forced air. Resistance Welding a method of welding metals in which the pieces are heated by an electric current passing through them at the point of contact and are also pressed together (upset). Accidental contact of elec-trode to metal objects can cause sparks, explosion, overheating, or fire. These are determined by the work piece being welded and the forces and currents being used to develop a proper weld nugget. What made you want to look up resistance welding? Define Resistance welding. Resistance Seam Welding – RSEW. Electric resistance welding is a group of welding processes in which welding heat is obtained from resistance of the work to the flow of electrical current and by application of pressure. All its оperatiоns are autоmatic and… The electric resistance wel… It differs from butt welding in that butt welding typically welds the entire joint at once and seam welding forms the weld progressively, starting at one end. Air-Carbon Arc Cutting (Cac-A) A cutting process of an arc, by which metals are melted by the heat using a carbon electrode. Check and be sure the area is safe before doing any welding. Resistance welding is a liquid state welding process in which the metal to metal joint created in liquid or molten state. Resistance seam welding is a process similar to that of spot welding process, but instead of pointed electrodes, wheel-shaped electrodes roll along and often feed the workpiece, making it possible to make long continuous welds. Resistance welding electrode size is determined by the electrode body diameter and the electrode face diameter. The heat developed at the contact … Resistance seam welding is a process that produces a weld at the faying surfaces of two similar metals. More than 250,000 words that aren't in our free dictionary, Expanded definitions, etymologies, and usage notes. Learn a new word every day. SPOT WELDING can cause fire or explosion. resistance welding noun a welding technique in which the parts to be joined are held together under pressure and heat is produced by passing a current through the contact resistance formed between the two surfaces In the 1940s the tungsten-inert gas process, using a nonconsumable tungsten electrode to perform fusion welds, was introduced. Electric resistance welding is widely used, for example, in manufacture of steel pipe and in assembly of bodies for automobiles. In resistance welding a heavy current (above 100 A) at a low voltage is passed directly through the work-piece and heat developed by the resistance to the flow of current, given by the expression 1 2 R/ (where I is the current in amperes, R is the resistance in ohms and t is the time or duration of flow of current in seconds) is utilised. Define Resistance spot welding. Types of the resistance welding. Copper is used for the electrodes as it has a high thermal conductivity and low electrical resistance compared to most other metals, ensuring that the heat is generated preferentially in the work pieces rather … Working Principle of Electric Resistance Welding. spot′-weld′ v. spot′-weld′er n. Laser beam welding can be performed in air rather than in a vacuum such as with electron beam joining. The key advantage of resistance welding is that no other materials are needed to create the bond, which makes this process extremely cost effective. It is a thermo-electric process in which heat is generated at the interface surfaces of welding plates due to electric resistance and a controlled low pressure is applied to these plates to create a weld joint. Welding Dictionary - A: ACTUAL THROAT: The minimum distance between the weld root and weld face. This produces a weld at the faying surfaces of two similar metals. Start your free trial today and get unlimited access to America's largest dictionary, with: “Resistance welding.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/resistance%20welding. resistance welding. Resistance welding involves the generation of heat by passing current through the resistance caused by the contact between two or more metal surfaces. Apply force and current through electrodes contacted metal components to be welded; and resistance heat is generated … Schematic diagram of resistance spot welding The welding heat is generated by the electric current, which is transferred to the workpiece through copper alloy electrodes. In this way, two pieces of material (usually metal but sometimes plastics as well) are bonded together. This process can be split into two types, resistance spot welding and resistance seam welding.
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