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OEM Update

High on welding practices

December 29, 2009 8:23 am

For any crane manufacturer the boom of the crane is the single most complicated and finely brought out part of the entire machine. Almost all booms are bent in complex oviform shapes, many use a pinning system to reduce tip loadings. A huge amount of effort goes into reducing boom weight to keep the axle loadings below the magic sum of 12 tons per axle. All this can be ensured through high quality steel and most advanced welding practices.
 
For all major European crane manufacturers – Grove, Liebherr, Tadano-Faun and Terex Demag — advanced welding standards are of utmost importance to keep the boom weight reduced and also ensure that they are of strong variants to undertake heavy lifting applications. As per companies, steel fabrication and welding of high quality steel are their core competence in making the final product.
 
Prototypes and complex components are manufactured by companies themselves while they have developed manufacturing and welding technologies to ensure quality booms. The welding specifications are passed on to vendors manufacturing the booms. One of the prominent European crane boom manufacturers is Belgium-based Vlassenroot. Major European, Chinese and Russian crane manufacturers source booms from Vlassenroot.
 
Every Vlassenroot boom starts as plate steel shipped via Antwerp, Canada from SSAB in Sweden. The steel plates are then bent and welded together into boom sections. Inside the boom, longitudinal welds are made using metal active gas welding, outside the weld is made using submerged arc welding.
 

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