DIE SET ASSEMBLY AND MAGNET MEANS FOR RELEASABLY ATTACHING DIES THEREIN

• US 3,782,166 A
• Filed: 06/09/1972
• Issued: 01/01/1974
• Est. Priority Date: 06/09/1972
• Status: Expired due to Term

• Current Assignee: Lawrence V. Whistler III, Lawrence V. Whistler Jr
• Original Assignee: Lawrence V. Whistler III, Lawrence V. Whistler Jr
• Inventors: Whistler, Lawrence V. Jr., Whistler, Lawrence V. III
• Primary Examiner(s): Lanham, Charles W.
• Assistant Examiner(s): Crosby, Gene P.
• Application Number:
  US05/261,402
• Time in Patent Office: 571 Days
• Field of Search: 72/462,470,474,475,446,447,448,324 83/619,698,699
• US Class Current: 72/462
• CPC Class Codes: B21D 37/04 Movable or exchangeable mountings for tools
• CPC Class Codes: B21D 37/10 Die sets; Pillar guides
• CPC Class Codes: B30B 15/026 Mounting of dies, platens or press rams
• CPC Class Codes: Y10S 100/918 Bolster and die
• CPC Class Codes: Y10T 83/883 Tools positioned by template
• CPC Class Codes: Y10T 83/9459 Magnetic connection
• CPC Class Codes: Y10T 83/9473 For rectilinearly reciprocating tool

Abstract

A die set assembly is disclosed with magnets provided for releasable attaching the dies in the assembly. A punch holder or shoe is provided with a die shoe spaced therefrom in aligned, confronting relationship. Magnets having opposite ends releasable attach at one end thereof to a punch means of the die set and releasable attach at the other end thereof to the punch holder. Other such magnets releasable attach one end thereof to a die means of the die set and releasably attach the other end thereof to the die shoe. A template arrangement is provided for aligning the die set.

Claims

1. A die set assembly, comprising a punch holder, a die shoe spaced from the punch holder in aligned confronting relationship therewith, a punch means, magnet means having opposite ends and releasably attached at one end thereof to said punch means and releasably attached at the other end thereof to said punch holder to releasably attach the punch means to the punch holder, a die means, and magnet means having opposite ends and releasably attached at one end thereof to the die means and releasably attached at the other end thereof to the die shoe to releasably attach the die means to the die shoe.

2. A die set assembly as in claim 1, wherein each of said magnet means has different magnetic strengths at the opposite ends thereof, the ends of greater magnetic strength attached to the punch means and the die means, respectively, and the ends of lesser magnetic strength attached to the punch holder and die shoe, respectively.

3. A die set assembly as in claim 2, wherein interengaging aligning means are on said punch means and said punch holder, and on said die means and said die shoe to align said punch means and die means relative to one another.

4. A die set assembly as in claim 3, wherein said interengaging aligning means comprises a template, and position locating means on each of said punch means, said die means, said punch holder, said die shoe, and as associated template to accurately position and align said punch means and die means.

5. A die set assembly as in claim 4, wherein said punch means comprises a punch plate having an upper face and lower face, a punch pad on the lower face of the punch plate, and punch steel on a lower face of the punch pad, said punch steel configured to produce a desired pattern in a workpiece, and said magnet means attached to the upper face of the punch plate.

6. A die assembly as in claim 5, wherein said template is substantially flat and planar and has a large opening therethrough, said punch plate being slightly larger than the size of the opening and positioned in overlying centered relationship relative to said opening by means of interengaging pin and guide bore means in said template and punch plate, said magnet means extending through said opening and into engagement with said punch holder, and said template secured in predetermined desired position on said punch holder by means of interengaging pin or post and guide bore means on said punch holder and said template.

7. A die set assembly as in claim 6, wherein said die means comprises a diE plate having an upper face and a lower face, die steel on the upper face of the die plate configured complementary to said punch steel to produce a desired pattern in a workpiece, and said magnet means attached to the lower face of the die plate.

8. A die set assembly in claim 7, wherein said die plate is slightly larger than the size of the opening in said template and is secured behind said template in centered relationship to said opening by means of interengaging pin or post and guide bore means on said template and said die plate, said magnet means attached to the lower face of said die plate and to said die shoe, said die steel extending upwardly through said opening in said template, and said template secured in desired position on said die shoe by means of interengaging pin or post and guide bore means on said die shoe and said template.

9. A die set assembly as in claim 8, wherein a plurality of magnets are positioned at predetermined points on said punch holder and said die shoe, respectively, to provide necessary support for said punch means and die means during the performance of work on a workpiece.

10. A die set assembly as in claim 9, wherein each of said magnet means comprises a permanent magnet, and said one end has a larger cross-sectional area than the other end to thus produce the greater magnetic strength at said one end.

11. A die set assembly as in claim 10, wherein the magnets attached to the die plate comprise spacing means to space the die means upwardly from the die shoe to a desired predetermined work elevation.

12. A die set assembly as in claim 11, wherein each of the magnet means has a longitudinal bore extending centrally therethrough, and a pin is securely fitted within said bore with one end of the pin projecting outwardly beyond the end of the magnet, and said punch plate and die plate each have a plurality of shallow recesses or bores therein at predetermined locations thereon, said pin in said magnet received in said shallow recesses to accurately locate the magnets relative to the punch plate and die plate, respectively.