The World’s Biggest Crane

AL.SK90 one of the biggest machines in the World

In September 2008 Abnormal Load Engineering unveiled the world’s highest capacity land based crane. Designed and built by ALE’s Research & Development Unit in Breda, Netherlands, the crane has a capacity to lift 4,300 tonnes.

Intended for use in the engineering construction, nuclear and offshore fabrication industries, the crane can be dismantled and shipped around the world in standard 20ft and 40ft shipping containers.

In what is a first for a crane of this type, it can be relocated on site fully rigged saving considerable time during the construction schedule of major projects. The ability to lift heavy loads at large distances allows
engineers to complete foundations and pipe racks in advance of major equipment installation.
FPSO construction benefits from the ability to build much larger process packages and install them from the land side without relying on floating cranes or relocating the hull within the limited radius of conventional
cranes.

Specifications of the crane:
Load Moment: 96,000 tonne metres
Lifting Capacity: 4,300te using a strand lift system.
Lifting Capacity: 600te with a quick winch system.
Main Mast: 61 – 130 metres.
Lifting Speed: 10m per hour using a strand lift system and 150m per hour using the winch system.
Slewing Speed: 28m per hour loaded and 50m per hour unloaded.

Source: http://www.ale-heavylift.com/

CNC machinery and tools

A CNC machine tool is a powered mechanical device used to fabricate metal components of machines by the selective removal of metal. The term machine tool is usually reserved for tools that used a power source other than human movement, but they can be powered by people if appropriately set up. Many historians of technology consider that the true machine tools were born when direct human involvement was removed from the shaping or stamping process of the different kinds of tools. For instance, they consider that lathe machine tools were invented around 1751 by Jacques de Vaucanson because he was the first to mount the cutting instrument on a mechanically adjustable head, taking it out of the hands of the operator.
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CNC Plasma Cutting Machines

Plasma cutting is a process used to cut steel and other metals (or sometimes other materials) using a plasma torch. In this process, an inert gas (in some units, compressed air) is blown at high speed out of a nozzle; at the same time an electrical arc is formed through that gas from the nozzle to the surface being cut, turning some of that gas to plasma. This plasma is sufficiently hot to melt the metal and moving sufficiently fast to blow molten metal away from the cut. The result is very much like cutting butter with a hot jet of air. Plasma cutters have also been used in CNC machinery. Manufacturers such as Retro Systems and Plasma CAM build CNC cutting tables, some with the cutter built in to the table. The idea behind CNC tables is to allow a computer to control the torch head making clean sharp cuts. Modern CNC plasma equipment is capable of multi-axis cutting of thick material, allowing opportunities for complex welding seams on CNC welding equipment that is not possible otherwise. For thinner material cutting, plasma cutting is being progressively replaced by laser cutting, due mainly to the laser cutter’s superior hole-cutting abilities. A specialized use of CNC controlled Plasma Cutters has been in the HVAC industry. Software will process information on ductwork and create flat patterns to be cut on the cutting table by the plasma torch. This technology has enormously increased productivity within the industry since its introduction in the early 1980’s. A typical HVAC cutting machine is Plasma Automation’s Vicon Cutting Table Plasma cutters use a number of methods to start the pilot arc, depending on the environment the unit is to be used in and its age. Older cutters use a high voltage, high frequency circuit to start the arc. This method has a number of disadvantages, including risk of electrocution, difficulty of repair, sparkgap maintenance, and the large amount of radio frequency emissions. Plasma cutters working near sensitive electronics, such as CNC hardware or computers, use the contact start method. The nozzle and electrode are in contact. The nozzle is the cathode, and the electrode is the anode. When the plasma gas begins to flow, the nozzle is blown forward. A third, less common method is capacitive discharge into the primary circuit via a Silicon Controlled Rectifier. PC: plasma cutting machines also plasma systems cutting or plasma.