Press, punch & die

Abstract

The present invention resides in a press, punch and die combination to be used to form and bend the separate extending beams diameter of a circular sheet metal disc with an over hanging edge. One projection is bent and formed at a time. Then the disc is indexed. The over hanging shape is accomplished by having the axis center line of the punch at an acute angle to the surface of a die where a portion of the sheet metal rests while the other portion is formed with a groove or arc. A strong wheel of a large size is possible. In the annealed state a ¼ inch thick 1095 spring steel for a 22″ diameter wheel with 24 beams is easily formed one at a time. When hardened this material has an elastic limit of 150,000 to 310,000 psi.

1 . A press, punch and die combination which comprises a punch with it,s axis at an acute angle to the surface of a die where a portion of the sheet metal rests while the other portion is formed with an over hanging shape.  
   
   
       2 . The press, punch and die described in  claim 1 , wherein it can be connected to an indexing mechanism to drive a sheet metal circular disc with 4 to 2oo separate extending beams on the outer diameter to be bent separately.  
   
   
       3 . The press, punch and die described in  claim 1 , wherein a groove can be formed in the bent portion.