Method for pulse forming

• US 3,417,456 A
• Filed: 09/30/1966
• Issued: 12/24/1968
• Est. Priority Date: 09/30/1966
• Status: Expired due to Term

• Current Assignee: Melvin J. Carlson
• Original Assignee: Melvin J. Carlson
• Inventors: Carlson, Melvin J.
• Application Number:
  US04/584,064
• Time in Patent Office: 816 Days
• US Class Current: 228/116
• CPC Class Codes: B21D 26/14 applying magnetic forces
• CPC Class Codes: Y10T 29/49805 Shaping by direct application of fluent pressure
• CPC Class Codes: Y10T 29/49917 by necking in cup or tube wall
• CPC Class Codes: Y10T 29/49927 Hollow body is axially joined cup or tube

Claims

1. A METHOD OF JOINING A TUBULAR WORKPIECE SELECTED FROM METAL AND PLASTIC MATERIAL TO A CYLINDRICAL WORKPIECE SELECTED FROM METAL AND PLASTIC MATERIAL COMPRISING THE STEPS OF:

(A) FABRICATING SAID TUBULAR WORKPIECE SO AS TO PROVIDE THREE INTEGRAL RINGS SPACED A PREDETERMINED DISTANCE APART, WITH A CENTER RING OF A RECTANGULAR CROSS SECTION HAVING A TOP AND A PAIR OF RINGS OF A RIGHT TRIANGULER CROSS SECTION EACH HAVING A PEAK SPACED ON EITHER SIDE OF SAID CENTER RING IN A MANNER SUCH THAT THE HYPOTENUSE OF EACH OF SAID TRIANGULAR RINGS AND SAID TIONS SLOPES TOWARDS SAID CENTER RING, THE DISTANCE FROM EACH SAID PEAK OF THE TRIANGULAR RINGS AND SAID TOP OF THE RECTANGULAR RING BEING APPROXIMATELY ONEHALF THE THICKNESS OF THE CYLINDRICAL WORKPIECE, (B) INSERTING SAID TUBULAR WORKPIECE INTO SAID CYLILNDRICAL WORKPIECE, ASSEMBLING THE WORKPIECES IN A HIGH ENERGY RATE FORMING MACHINE, SAID MACHINE HAVING A PAIR OF RINGS LOCATED ABOVE EACH SAID PEAK OF SAID TRIANGULAR RINGS AND JOINING SAID TUBULAR WORKPIECE TO SAID CYLINDRICAL WORKPIECE BY MEANS OF A HIGH ENERGY, HIGH SPEED IMPULSE.