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Arc welding
About: Arc welding is a research topic. Over the lifetime, 25393 publications have been published within this topic receiving 168182 citations.
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19 Jul 2005
TL;DR: In this article, the adjustment operations such as inching, retracting, and gas checking of a welding wire without using a button provided on a welding power source or a remote control are presented.
Abstract: [PROBLEMS] To perform adjustment operations such as inching, retracting, and gas checking of a welding wire by an operator using a button provided on an arc welding torch without using a button provided on a welding power source or a remote control. Provide a welding torch that can be performed. In an arc welding torch, one of a plurality of adjustment modes including an inching mode for feeding a welding wire in a forward direction, a retract mode for feeding a welding wire in a reverse direction, and a gas check mode for discharging a shielding gas. The adjustment mode selection means 23 for selecting one, the display means 22 for displaying the adjustment mode selected by the adjustment mode selection means in an identifiable manner, and the adjustment mode selected by the adjustment mode selection means An execution button 24 for outputting an adjustment mode command MC and data sending means for sending the adjustment mode command to the welding power source are provided. [Selection] Figure 2
50 citations
TL;DR: In this paper, a finite element-based simulation of the plasma arc welding process is presented, which determines the weld pool's three-dimensional capillary surface shape, the approximate solid-liquid phase boundary, and calculates the pool's 3D flow and temperature fields.
50 citations
TL;DR: Two cases of retinal burns resulting from exposure to MIG welder emissions which presented on consecutive days to the Leicester Royal Infirmary are presented, this is the first report of such injuries relating specifically to Mig welding.
Abstract: A new generation of arc welder has recently become widely available at a price which is within reach of most amateurs and part-time mechanics, known as the MIG welder (metal-arc inert gas welder). In MIG welding the arc is ensheathed in a stream of inert gas which prevents the molten metal from oxidising. The stream of gas changes the character of the emitted radiation, and it is possible that this type of welder poses a greater threat to sight than previously recognised. Radiation in the ultraviolet range emitted by arc welders is absorbed by the unprotected cornea and lens, giving rise to a keratoconjunctivitis, or 'arc-eye,' which, though intensely painful, is not considered a threat to sight. Radiation in the visible and near infrared spectrum, however, penetrates the eye to be absorbed by the retina and may cause thermal or photochemical damage which may be permanent and sight-threatening. Retinal injuries resulting from exposure to ordinary electric welding arcs have been reported, but such injuries are uncommon. Two cases of retinal burns resulting from exposure to MIG welder emissions which presented on consecutive days to the Leicester Royal Infirmary are presented. This is the first report of such injuries relating specifically to MIG welding.
50 citations
TL;DR: In this article, the effect of laser beam on arc plasma was investigated, and the influence of laser power on the welding quality was investigated and it was found that the threshold value for laser power which can improve welding quality is 50-70 W in hybrid welding.
Abstract: The previous work indicated that there were interactions between laser beam and arc plasma in low-power laser/arc hybrid welding. In order to study the interactions, the spectra of plasmas in tungsten inert gas (TIG) welding and hybrid laser/TIG welding of magnesium alloy are acquired, and the differences between them are analyzed. In hybrid welding, the intensities of emission spectra of Mg I and Mg II are much stronger than in TIG welding, while those of Ar I and Ar II are a little weaker than in TIG welding. The temporal characterizations of the sensitive lines of Ar I, Ar II, Mg I, and Mg II are studied to investigate the effect of laser beam on arc plasma. In addition, the influence of laser power on the welding quality is investigated, and it is found that the threshold value of laser power which can improve the welding quality is 50-70 W in hybrid welding. Finally, the electron temperature and electron density of welding plasma are estimated, and the interaction between laser and arc is discussed.
50 citations
TL;DR: In this paper, the weldability of different zinc-coated steels with aluminum is discussed, using a 2.5kW ultrasonic spot welding welder, and the results show that soft hot-dipped zinc (DX56-Z)-coated steel results in better weld performance than hard (galv-annealed) zinc coatings (DX53-ZF).
Abstract: Dissimilar joining of aluminum to steel sheet in multimaterial automotive structures is an important potential application of ultrasonic spot welding (USW). Here, the weldability of different zinc-coated steels with aluminum is discussed, using a 2.5-kW USW welder. Results show that soft hot-dipped zinc (DX56-Z)-coated steel results in better weld performance than hard (galv-annealed) zinc coatings (DX53-ZF). For Al to hard galv-annealed-coated steel welds, lap shear strengths reached a maximum of ~80% of the strength of an Al-Al joint after a 1.0 s welding time. In comparison, welds between Al6111-T4 and hot dipped soft zinc-coated steel took longer to achieve the same maximum strength, but nearly matched the Al-Al joint properties. The reasons for these different behaviors are discussed in terms of the interfacial reactions between the weld members.
50 citations