In conventional GMAW, the electric arc naturally follows the path of least resistance between the electrode and the base material. The arc is difficult to control, and under certain conditions (e.g. welding materials of different thicknesses) good welding seams are almost impossible.
When the laser beam is "added" to the gas metal-arc welding process, the arc follows the laser beam path, and is stabilized. Not only is the quality of the welding seam greatly improved, but welding speeds can be increased up to 100 % for the same welding depth. Also, oscillating seams or seams with a complex geometry are easy when using laser beam stabilization. The new welding process can be used for conventional steels as well as for high and higher strength steels, or for aluminium materials.Since the laser used for this welding method has a relatively low output power (200 to 400 watts), investment cost are also kept at a minimum, making this process especially attractive for small and middle-sized welding companies.
The economic use of this innovative welding process has already been verified by two industrial partners. The LZH carries out feasibility tests for various materials. Also, support for process integration can be offered.Contact:
You can find the LZH press releases with a WORD-download and when possible illustrations at www.lzh.de under "publications/press releases"
Michael Botts | idw
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Previous detections of gravitational waves have all involved the merger of two black holes, a feat that won the 2017 Nobel Prize in Physics earlier this month....
Material defects in end products can quickly result in failures in many areas of industry, and have a massive impact on the safe use of their products. This is why, in the field of quality assurance, intelligent, nondestructive sensor systems play a key role. They allow testing components and parts in a rapid and cost-efficient manner without destroying the actual product or changing its surface. Experts from the Fraunhofer IZFP in Saarbrücken will be presenting two exhibits at the Blechexpo in Stuttgart from 7–10 November 2017 that allow fast, reliable, and automated characterization of materials and detection of defects (Hall 5, Booth 5306).
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Scientists from the Max Planck Institute of Quantum Optics, using high precision laser spectroscopy of atomic hydrogen, confirm the surprisingly small value of the proton radius determined from muonic hydrogen.
It was one of the breakthroughs of the year 2010: Laser spectroscopy of muonic hydrogen resulted in a value for the proton charge radius that was significantly...
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