Topic
Electric resistance welding
About: Electric resistance welding is a research topic. Over the lifetime, 16761 publications have been published within this topic receiving 154851 citations.
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TL;DR: In this article, the behavior of thin welds of different grades of steels in dynamic loading conditions such as those experienced in automotive crash test is investigated. And the evaluation of resistance to dynamic failure will be studied through impact tensile test (ITT).
45 citations
TL;DR: In this paper, the possibilities and the technological conditions for welding structural steels, especially high-strength steels reproducibly and with high quality, are described and compared with common MIG/MAG and SAW welding as well as with electron and laser-beam welding.
45 citations
Patent•
01 Nov 1999
TL;DR: In this paper, a method of solid state welding for joining metal parts having opposed planar and parallel surfaces is described. But the method is performed at rotational velocities well below the normal critical surface velocity of friction welding and requires significantly less kinetic energy than conventional friction welding.
Abstract: A method of solid state welding for joining metal parts having opposed planar and parallel surfaces which includes quickly heating the opposed surfaces of the metal parts with a high frequency induction heater to the hot working temperature of the metal parts in a non-oxidizing atmosphere, continuously moving at least one of the parts relative to the other part generally parallel to the parallel surfaces of the parts, and quickly bringing the opposed surfaces of the parts together with an axial force approximately equal to the conventional friction welding forging force while continuing the relative motion of the parts until the absorbed kinetic energy is approximately equal to ten percent of the energy input required by conventional friction welding The resultant weld is of a quality equal to or greater than normal friction welding but has a much smaller volume of flash and requires significantly less kinetic energy than conventional friction welding and is performed at rotational velocities well below the normal critical surface velocity of friction welding The welded metal part includes a generally planar flash extending radially from the inner section of the opposed planar welded surfaces having a volume corresponding to a combined loss of length of less than 02 axial inches per inch of wall thickness Thus, the disclosed solid state welding method is substantially more efficient than prior friction or other welding methods and results in an improved product
45 citations
TL;DR: In this article, a double-ellipsoidal heat source model was proposed to simulate the effect of periodic and recurrent arcing and metal deposition phenomena in the cold metal transfer type of welding.
Abstract: A heat source model is proposed to simulate the effect of periodic and recurrent arcing and metal deposition phenomena in the cold metal transfer type of welding. This model will facilitate studying of weld pool behavior and resultant mechanical properties in detail for this type of welding. The proposed model utilizes a double-ellipsoidal heat source model as the basis and makes the geometrical and heat input parameters dependent on time.
45 citations
TL;DR: In this paper, a rotating arc system for narrow gap horizontal welding was developed for solving the problem that the molten pool sagged due to the gravity, and the asymmetry of joint formation indicated that the heat affected zone width and microstructure in upper side were larger than that in lower side.
Abstract: A rotating arc system for narrow gap horizontal welding was developed for solving the problem that the molten pool sagged due to the gravity. The characteristic of the system was that the synchronous rotation of nozzle and wire was generated by eccentric sleeve driven by motor. This process not only may reduce welding effective heat input due to an increase in the welding instantaneous velocity but also may disperse arc force which could counteract the gravity of upper side of molten metal. Both the two aspects were beneficial for horizontal weld formation. Experimental results indicated that shapely horizontal joint could be obtained in appropriate rotating parameters. The asymmetry of joint formation indicated that the heat affected zone width and microstructure in upper side were larger than that in lower side. The effective heat input difference near each side caused by the instantaneous velocity difference was the main reason why the formation characteristics occurred.
45 citations