Sunday 18 November 2018

Bends     For the  ease  of manufacturing, multiple bends on the  same plane  should occur in the same direction.     Avoid large  sheet metal  parts with small bent flanges.     In low  carbon  steel sheet  metal, the minimum radius of a  bend should be  onehalf the  material thickness or 0.80 mm (0.03  inch), whichever is  larger.     Bends specified as  angles may  be toleranced  at plus or minus one-half degree  at a location adjacent to the bends.   Curls     The minimum radius  is two times the material thickness with an opening  to a minimum of one  material thickness.     The minimum distance  between  a  curl and the edge  of  a  hole is the  radius of the  curl plus the  material thickness.     The minimum distance  a  curl should be from an internal bend is  six  times the material thickness plus the  radius of the curl.     The minimum distance  a  curl should be from an external bend is  nine times the material thickness plus the  radius of the  curl.   Dimples     The maximum diameter should be  six  times the material thickness, and a  maximum depth of one-half the  inside  diameter.     The minimum distance  that a  dimple should be  from a hole  is three  times the  material thickness plus the  radius of the  dimple.     The minimum distance  that a  dimple should be  from the  edge  is four  times the material thickness plus the  inside  radius of the dimple.   

Bends     For the  ease  of manufacturing, multiple bends on the  same plane  should occur in the same direction.     Avoid large  sheet ...