Improving Global Quality of Life
Improving Global Quality of Life
Improving Global Quality of Life
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9 Needs and challenges <strong>of</strong> major industry sectors for future applications<br />
advanced technological level as for steel fabrication due to lower priority in the past by fabrication and<br />
welding systems manufacturers.<br />
There is a great potential, in particular for aluminium ship structures for further improvement. Development<br />
is carried out in close co-operation between shipyards, research institutes, fabricators <strong>of</strong> production<br />
systems and welding supply companies. Suppliers <strong>of</strong>fer technologies and systems for robotic welding <strong>of</strong> ship<br />
structures. Off-line programming based on CAD data combined with a high degree <strong>of</strong> automatic generation<br />
<strong>of</strong> the complete control programmes for welding is required to fully realise the capacity and potential <strong>of</strong> the<br />
welding station.<br />
The main objective for using sensors in robotic welding <strong>of</strong> aluminium ship construction, is the need for<br />
localising the point where to start welding and then to follow the seam. There are remaining challenges and<br />
problems, which have to be solved before the technology can be considered to be ready for implementation<br />
in the production <strong>of</strong> aluminium constructions in shipyards. The future work will be focused on the <strong>of</strong>f-line<br />
programming. So far it has been focused mainly on the problems connected to accuracy. The strategy for<br />
handling the huge amount <strong>of</strong> data for a complex hull section and the welding required is not clear and has<br />
to be emphasised in future work.<br />
Generally, the business drivers in the shipbuilding industry include reducing both the cost <strong>of</strong> producing new<br />
ships and reducing the total ownership cost over the life <strong>of</strong> the ship.<br />
9.8.7 Hot topics<br />
Improved Joining Technologies for Ship Structures: There is the need for continued improvement<br />
and the application <strong>of</strong> “World-class” processes that increase efficiency, reduce rework, and shorten<br />
construction time. Joining processes such as precision arc welding, friction stir welding, and<br />
hybrid laser arc welding continue to be <strong>of</strong> high interest. Additionally, the shipyards have interest in<br />
expanding the use <strong>of</strong> automation for large marine structures using smart adaptive welding systems.<br />
Process Control: Application <strong>of</strong> process control that will result in more standardised production<br />
processes, improved accuracy control, and improved cost, quality, and schedule performance.<br />
Interest areas include advanced measurement techniques, expanded use <strong>of</strong> statistical process<br />
control, automated data storage, analysis, and transfer. Distortion prediction and accuracy<br />
control are important subsets <strong>of</strong> this. Controlling weld distortion continues to be a challenge for<br />
shipbuilders and the problem increases as lighter and lighter structures must be built. Technology<br />
needs include improved modelling and simulation tools and the development and application <strong>of</strong><br />
workable manufacturing processes capable <strong>of</strong> controlling distortion during fabrication. EWI has field<br />
demonstrated a novel automated technology, dubbed Transient Thermal Tensioning, for control <strong>of</strong><br />
buckling distortion on thin panels.<br />
Joining Non-traditional Materials: There is a need for increased performance (e.g. speed and<br />
manoeuvrability) and this is driving the requirement to reduce ship weight. This results in the use<br />
<strong>of</strong> non-traditional materials including non-metallic composites, high-strength steel, aluminium, and<br />
titanium. There are needs for materials joining processes for these materials and processes to join<br />
dissimilar combinations <strong>of</strong> these materials.<br />
Advanced Non-Destructive Inspection Techniques: Shipyards want to minimise the cost <strong>of</strong><br />
inspecting welds. New solutions include the implementation <strong>of</strong> advanced non-destructive inspection<br />
technologies. These technologies include processes for improved inspection under lagging,<br />
ultrasonic and digital radiographic inspection <strong>of</strong> welds, inspection <strong>of</strong> composite structures, and the<br />
Through Optimum Use and Innovation <strong>of</strong> Welding and Joining Technologies<br />
<strong>Improving</strong> <strong>Global</strong> <strong>Quality</strong> <strong>of</strong> <strong>Life</strong><br />
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