Despite the pros the metal shearing process also has some notable disadvantages.
Disadvantages of sheet metal process.
Notable disadvantages of shearing.
However the disadvantages are that forming times are long production rates are low and the parts are not suitable for high temperature use.
It produces good surface finish.
In some applications especially in stretch wrapping the process is slower than competitive processes and it is not suited to high volume production.
Shearing is less than ideal with harder metals.
Stretch forming can be used to produce large parts with shallow contours but it is only suitable.
For example using the process for cutting tungsten is simply a bad idea.
Metal is more cost efficient when it comes to long term high volume lines of production.
This process is also used for straightening parts.
This process is for long parts with constant complex cross sections.
However stretch draw forming with mating dies can be done as rapidly and automatically as conventional.