|
Buses, trucks, tractors, trains, aircraft, cabins, wheelbarrows, this group covers a number of very different items.Tractors and trucks may require very heavy frame constructions, whereas an aircraft is built to weigh as little as possible.
Consequently, many different cutting, joining and surface treatment methods are used. Various materials are cut using oxy-fuel, plasma or laser cutting, depending on the type of material and the required weld preparation. For joining of components, the arc processes MIG, MAG, TIG and plasma welding are used. With the proper equipment and skills, high welding speeds and large material deposition rates during MAG welding will reduce production costs. Depending on the type of material and the weld quality requirements, gas welding can be chosen to join similar metals, and flame brazing/soldering for dissimilar and non-ferrous metals. Laser welding is used in certain special applications where the material thickness is small and the quality requirements are rigorous.
Weld distortions are a key problem in manufacturing of trains, for example. Large side panels are joined by welding, and may become distorted. Flame straightening is a highly effective method for correction of these distortions. If carried out by an experienced worker with the proper equipment, a considerable amount of money can be saved by straightening the distortions.
Flame gouging, another flame process, is used to remove weld imperfections before rewelding. Flame cleaning, on the other hand, targets the surface only and is use to remove layers such rust, paint or grease from large surface areas |
