ppt and report on trends in welding

Trends in welding processes in engineering construction for infrastructure projects

R E Dolby
TWI Ltd, UK
Paper presented at the 56 ^th IIW Annual Assembly, 6 - 11 July 2003, Bucharest, Romania
'Trends in Welding Processes in Engineering Construction for infrastructure projects'

Abstract

The paper examines welding process trends in the construction of buildings, bridges, pipelines and other engineering items necessary for infrastructure in urban environments. Productivity gains in arc welding are reviewed, and the increasing use of laser cutting and welding, as well as laser-arc hybrid welding, particularly in Europe, is discussed and explained. Some friction technologies are already widely adopted, but they could make more impact with further development. Electron beam welding could also be used with economic benefit in some situations, but as with all non-arc processes, it will only be adopted if significant gains in productivity and cost reduction can be created to justify the more specialist welding equipment required. Many productivity improvements can come from non-welding activities in the fabrication process.

Building a Model Hydraulic Knuckle Crane mechnical project

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Abstract

A ship is a busy place. When out to sea, naval, research, and fishing vessels pull or push heavy loads, like research equipment and crab pots, into and out of the water. But equipment and pots can weigh hundreds of pounds. So how does a ship's crew lift loads efficiently and accurately? With a hydraulic knuckle crane, of course. But what is hydraulics and why does hydraulics make certain tasks easier? 

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