Topic
Butt welding
About: Butt welding is a research topic. Over the lifetime, 7153 publications have been published within this topic receiving 44467 citations.
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Papers
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08 Oct 1992
TL;DR: In this paper, a multiple operator welding apparatus is described for use in stick arc welding, GTAW, FCAW, ACAC, and GMAW arc welding processes, where one or more welding modules are selectively mounted in a main power frame and connected to the power source by a knife blade connector.
Abstract: A multiple operator welding apparatus is disclosed which is particularly well suited for use in stick arc welding, GTAW, FCAW, ACAC, and GMAW arc welding processes. One or more welding modules are selectively mounted in a main power frame and connected to the power source by a knife blade connector which permits removal and replacement of one or more welding modules while the power source is in use. The knife blade connector also permits one or more welding modules to be removed from the main power frame and used at a remote location. The welding module for use with the multiple operator welding apparatus incorporates an inductor which permits use of a reduced incoming module voltage while producing a satisfactory weld. The reduced incoming module voltage results in significant energy savings.
48 citations
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TL;DR: In this paper, a neural network and multiple regression methods were used to predict the top-bead width in robotic gas metal arc (GMA) welding process, and additional multi-pass butt welds were carried out in order to verify the performance of the multiple regression and neural network models as well as to select the most suitable model.
Abstract: With the advance of the robotic welding process, procedure optimisation that selects the welding procedure and predicts bead geometry that will be deposited has increased. Amajor concern involving procedure optimisation should define a welding procedure that can be shown to be the best with respect to some standard, and chosen combination of process parameters, which give an acceptable balance between production rate and the scope of defects for a given situation. This paper represents a new algorithm to establish a mathematical model for predicting top-bead width through a neural network and multiple regression methods, to understand relationships between process parameters and top-bead width, and to predict process parameters on top-bead width in robotic gas metal arc (GMA) welding process. Using a series of robotic GMA welding, additional multi-pass butt welds were carried out in order to verify the performance of the multiple regression and neural network models as well as to select the most suitable model. The results show that not only the proposed models can predict the top-bead width with reasonable accuracy and guarantee the uniform weld quality, but also a neural network model could be better than the empirical models.
48 citations
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14 Dec 2004TL;DR: In this article, a welding unit (27), comprising a welding device (1), with a welding torch unit (29) which may be connected by means of a tube group (23, 28), is described.
Abstract: The invention relates to a welding unit (27), comprising a welding device (1), with a welding torch unit (29) which may be connected thereto by means of a tube group (23, 28). At least one controller (4), a welding power supply (2) and, optionally, a wire supply unit (30) are arranged in the welding device (1). The welding torch unit (29) comprises at least two separate welding burners (10, 35), embodied for carrying out at least two independent separate welding processes. The invention further relates to a welding method, in which at least two different welding processes can be combined. According to the invention, such a welding unit (27) and welding method can be achieved, in which the amount of introduction of additional material and the heat or energy supply into the workpiece (16) may be adjusted as independently from each other as possible, whereby the first welding burner (10) is embodied for carrying out a welding process and at least one second welding burner (35) is embodied for carrying out a cold metal transfer welding process with a back-and-forth movement of a welding rod (32) and for synchronisation of the welding processes carried out with the at least two welding burners (10, 35).
48 citations
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24 Nov 2003TL;DR: A comparison of several processes for joining plastic materials shows that Friction Stir Welding stands as an able competitor with established processes.
Abstract: As plastics become candidates for an increasing number of applications, it is important to continue developing processes to join them efficiently. In the past, a few processes have dominated the area. Now a new process, Friction Stir Welding, enters the arena of competition with the established practices. This paper delivers a comparison of several processes for joining plastic materials. Process parameters investigated include machine and tool costs, part preparation, weld rate, joint efficiency, consumables, reproducibility, and process capability. When compared on these bases, Friction Stir Welding stands as an able competitor with established processes.
48 citations
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25 Apr 2008-Materials Science and Engineering A-structural Materials Properties Microstructure and Processing
TL;DR: In this paper, a new experimental procedure was adopted to eliminate the initial butt surface of two plates to be joined and examine the effect of the initial Butt surface on the formation of the zigzag line and the tensile properties of the welds.
Abstract: A new experimental procedure—stir-in-plate welding was adopted to eliminate the initial butt surface of two plates to be joined and examine the effect of the initial butt surface on the formation of the zigzag line and the tensile properties of the welds. The comparison between the butt and stir-in-plate welds indicated that under as-welded condition the zigzag line did not show up in the welds, and two welds exhibited similar tensile properties and fracture characteristics. After post-weld T6-treatment, the zigzag line appeared on the butt weld as zigzag micro-crack at the root tip and discontinuously-distributed cavities of 50–200 μm throughout the weld, which were verified to be associated with the oxide particles. This resulted in the reduced tensile strength and significantly deteriorated ductility with the fracture initiating and propagating along the zigzag line. No zigzag line was discernible on the T6-treated stir-in-plate weld.
48 citations