Forming <br>undulations (ribs): The sheet is partially stretched into convex and concave shapes with a die. <br>Flanging: Use a mold to turn the hole or outer edge of the sheet into a straight wall.
forming<br>Undulation (rib pressing): use a die to locally stretch the sheet into convex and concave shapes.<br>Flanging: turn the hole or outer edge of the plate into a straight wall with a die.
take a desired shape Fluctuation (rib pressing): The sheet metal is partially stretched into convex and concave shapes with a die. Flanging: Turn the hole or outer edge of the sheet into a straight wall with a die.