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Nemchinsky V.A.,Keiser University | Meyer D.W.,ESAB Welding and Cutting Products
EPJ Applied Physics | Year: 2010

The main force that detaches a molten droplet from the electrode (wire) during arc welding is the interaction of the arc current with its own magnetic field. The magnitude of this force depends on the current distribution inside the droplet. A method to regulate the current distribution is proposed. The current redistribution is achieved by striking an additional arc with the droplet serving as a cathode of this arc. By the current redistribution it is possible (i) to decrease the threshold current of the globular to spray transition during GMA welding, (ii) to achieve this transition in different plasma gases, and (iii) to control the propelling direction of the detaching droplet. Some preliminary experiments confirm the proposed method.

Martin C.,ESAB Welding and Cutting Products | Nemchinsky V.A.,Keiser University | Severance W.S.,ESAB Welding and Cutting Products
Journal of Physics D: Applied Physics | Year: 2013

Direct calorimetric measurements allowed us for the first time to experimentally determine the power delivered by iron oxidation during plasma arc current cutting of steel with oxygen as a plasma gas. Experiments were performed with 6.34 mm mild steel cut underwater with a 100 A arc. A comparison of the power input into the water and the electrical power of the arc allowed us to calculate the power of the chemical reaction. The measured power of reaction was approximately 20% of the total electrical power of the arc. © 2013 IOP Publishing Ltd.

Hahn H.,ESAB Welding and Cutting Products
Welding Journal | Year: 2015

Traceability satisfies regulatory and standard requirements, and also can be used to analyze efficiency and improve manufacturing operations. Traceability is defined by ASME as the ability to verify the history, location, or application of an item by means of documented recorded identification. The traceability process also generates additional data that can be used to analyze the efficiency of production processes for continuous improvement in lean or just-in-time manufacturing, to meet internal quality processes and systems standards such ISO 9000, and to make critical business decisions. To draw a traceability analysis, first of all we should create or import a work order from a resource planning systems (ERP). A geometry description of the part is applied using a unique name. Using existing drawings as parts in an order allows assigning each unique ordered part a serial number or other unique identifier. A database of the existing plates to be cut should contain geometry of the plate. After executing the numerical control program, the connected data should be stored for further use.

Ferree S.,ESAB Welding and Cutting Products | Lake F.,ESAB Welding and Cutting Products
Welding Journal | Year: 2012

A study was conducted to analyze a variety of processes, consumables, and shielding gas combinations to better understand fume emission rates for stainless steel joining and cladding applications. Chromium Cr(VI) was found to be one of the major welding fume constituents that needed to be controlled to provide safe working environments and to meet industry regulation requirements when joining or cladding with the stainless steel electrodes evaluated in the investigation. The investigation provided Cr(VI) data despite the existence of other constituents in stainless steel welding fumes. The comparisons between welding processes and electrodes in this study were meant to provide fabricators with information to help in selecting the optimum solution for their stainless steel arc welding applications and fume control.

Howell J.,ESAB Welding and Cutting Products
Welding Journal | Year: 2015

First-time buyers can quickly and easily move into welding automation using pre-engineered systems. Today, about one third of all robotic welding installations in North America are pre-engineered cells. One properly applied pre-engineered system with one operator can generally do the equivalent work of three productions welders. The cost benefits of replacing the labor cost of three skilled workers with one operator, plus a lease payment, can be significant. If the system is used on a daily basis for one shift, 100 percent return on investment is possible.

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