|Fig. 1||Fig. 2|
It is well known that wood has grains.
Likewise, the metal has a flow of contexture. This is called "Metal Flow".
During the cutting and grinding processes, such metal flow is disrupted because unnecessary portions of a large piece of material are cut off. iFig.1j
In the case of cold forming, the material itself is shaped, and the metal flow is kept in tact. iFig. 2j
The rigidity of such cold formed parts is extremely improved because the metal flow is not disrupted as it would be with the cut and ground parts.
This is a photograph of actual metal flow.
Normally, we are not able to see such metal flow, but we photographed it after special treatment.