1：Bridge width must larger than 1.5 times sheet thickness, Bridge width must larger than 1.8mm.
2：Must leave enough unload time when program.
3：The tools are designed according to the sheet thickness which provided by customers, so it can not process different sheet thickness.
4：Please notice the min. distance between the bridge-hole, we can design single brige and double brige tools and forming top surface can be flat and arc .
5：Forming height: M.S. and Al are 1.5 times sheet thickness, S.S. is 2 times, because of different sheet ductility.
6：Bridge has light sunken after forming, if thin sheet is narrow and long.