Stamping forming refers to overall stamping forming; welding forming refers to the final forming process is welding; with today's welding technology, the strength is no problem, and in most cases the cost of overall stamping forming Higher:
Generally, when the size of the component exceeds the molding capacity, welding molding will be chosen; molds can also be developed for overall stamping molding. Unless the batch size is large, the cost will be greatly increased, and there is no welding molding. Cost control;
Even if it is welded, the parts still need to be preformed first, usually using existing molds or existing special tools;
After preforming The parts should be pre-assembled according to the final size requirements. After the measured dimensions are qualified, the welding operation and control should be carried out according to the requirements of the welding process, and the welds should be subjected to non-destructive testing;
In fact, unless the raw materials ordered are sufficient size, otherwise when the overall stamping is formed, the raw materials often need to be spliced, and non-destructive testing is performed after welding, and then the whole is formed. Non-destructive testing is also required after forming. At this time, the cost of the overall stamping increases again;
Let’s talk about the strength issue. Generally, welding process evaluation requires mechanical performance testing. The mechanical properties of the weld will not be much lower than the base metal, or even stronger. This depends on the requirements for welding material selection. If the customer specifies If the strength is high, you can choose high-matching welding materials. If the customer chooses high toughness, you can choose low-matching welding materials, so the strength problem can basically be solved;
If the parts can be formed by integral stamping , and can be formed by welding. At this time, overall stamping is preferred, which has low cost and higher reliability.