What are the main materials of weldments?
The parts of weldments are mostly made of rolled metal materials (thin plates and profiles), while a small number of castings, forgings and stampings are made of blanks. Most of the latter can be directly welded, except for some processes that require machining, cutting (blanking), edge processing, forming and bending, and groove cleaning before welding. These processes are indispensable, and their importance lies in that the quality of material processing will directly or indirectly affect the product quality and production efficiency.
The workload of metal material processing accounts for a considerable proportion in welding production. For example, in heavy machinery welding structures, it accounts for 25%~60% of the total processing time. Therefore, improving the mechanization level of material processing technology and adopting advanced processing methods play an important role in improving processing quality and labor productivity.
