Straight out of the arc: Advances in technology and techniques have taken arc welding into the high precision arena

Article Abstract:

An arc welding technique has been developed which is as accurate as laser and electron beam welding. It uses a contained DC arc plasma and has been used to weld stainless steel detonator capsules. The micro plasma torches feature a central negative tungsten electrode, surrounded by a water cooled, earthed copper nozzle. The temperature of the flame combined with the energy of electrons results in heating, and Argon gas steams are blown through the torch.

Welding, Electric welding

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The process that came in form the cold: High precision stainless steel parts can be made in one shot thanks to advances in cold forming

Article Abstract:

A new process allows small components to be cold forged to final shape in one shot. It is suitable for high speed mass product of small parts. Deep cold forming was used extensively during World War II when German engineers found the secret was to phosphate the steel first, then coat it in soap. The reaction of soap with the phosphate formed a chemically bonded lubricant layer, which prevented cracking.

Aluminum founding, Aluminum casting (Process)

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Light measures light with femto precision

Article Abstract:

Research examining measurement techniques for fibre optics is presented. Particular attention is given to the operational details of the technique, including its dependence on the analysis of spectral lines from reflected light emerging from a long length of optical fibre.

Methods, Measurement, Fiber optics, Optical measurements, Optical measurement

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