Claims
- 1. An apparatus for forming a powder material into a solid form through the application of pressure, comprising:
a die; a lower compression punch insertable into a lower end of said die, said compression punch having a center pin with a ceramic-tip passing therethrough where the ceramic reduces the wear of said outer surface of said center pin, wherein said center pin further comprises a mandrel arbor positively engaged and passing through said ceramic tip of said center pin; powder material for filling at least a portion of the cavity defined by said die, said lower compression punch and said center pin; and an upper compression punch, insertable into an upper end of said die to compact the powder material.
- 2. The apparatus of claim 1, wherein said mandrel is positively engaged along a planar surface between at least a portion of an end of said center pin and a shoulder of said mandrel.
- 3. The apparatus of claim 2, wherein said mandrel is fastened to said base by a retainer pin inserted in coaxially aligned holes in said base and said mandrel arbor.
- 4. The apparatus as recited in claim 1, wherein said tip is affixed to said shaft of said base by a retainer pin inserted in coaxially aligned holes in said base and said tip.
- 5. The apparatus as recited in claim 1, wherein said tip is affixed to said shaft of said base by a plug inserted in coaxially aligned holes in said base and said tip.
- 6. The apparatus as recited in claim 5, wherein said plug positively engages an inside diameter of the coaxially aligned holes in an interference fit.
- 7. The apparatus as recited in claim 5, wherein said plug is retained within an inside diameter of the coaxially aligned holes using an adhesive.
- 8. The apparatus as recited in claim 5, wherein said plug is retained within an inside diameter of the coaxially aligned holes using a phase change alloy.
- 9. The apparatus of claim 1, wherein said mandrel is positively engaged along a planar surface between at least a portion of an end of said center pin and a shoulder of said mandrel and is threadably engaged with the lower compression punch.
- 10. A method of manufacturing a compression center pin for use in a punch and die powder compaction apparatus, comprising the steps of:
forming a center pin base of a rigid material); forming a center pin tip of a ceramic material; and affixing the center pin tip to the center pin base, wherein the step of affixing the center pin tip to the center pin base includes inserting a plug into coaxially aligned holes in the center pin base and the center pin tip.
- 11. The method of claim 10, wherein said plug is positively engages an inside diameter of the coaxially aligned holes in an interference fit.
- 12. The method of claim 10, wherein said plug is retained within an inside diameter of the coaxially aligned holes using an adhesive.
- 13. The method of claim 10, wherein said plug is retained within an inside diameter of the coaxially aligned holes using a phase change alloy.
- 14. A compression punch insertable into die for forming a powder material into a solid form through the application of pressure, said compression punch comprising:
a base of a rigid material; and a ceramic tip, attached to said base, where the ceramic tip reduces the wear of at least a portion of an outer surface of the compression punch.
- 15. The apparatus as recited in claim 14, wherein said ceramic tip is affixed to a shaft extending from said base by a retainer pin inserted in coaxially aligned holes in said shaft and said ceramic tip.
- 16. The apparatus as recited in claim 15, wherein said ceramic tip is affixed to a shaft extending from said base by a plug inserted in coaxially aligned holes in said shaft and said ceramic tip.
- 17. The apparatus as recited in claim 16, wherein said plug positively engages an inside diameter of the coaxially aligned holes in an interference fit.
- 18. The apparatus as recited in claim 16, wherein said plug is retained within an inside diameter of the coaxially aligned holes using an adhesive.
- 19. The apparatus as recited in claim 16, wherein said plug is retained within an inside diameter of the coaxially aligned holes using a phase change alloy.
- 20. A center pin of a lower compression punch insertable into a die for forming a powder material into a solid form through the application of pressure, the center pin comprising:
a center pin base, said base having a shoulder; and a ceramic tip affixed to said base at the shoulder.
- 21. The center pin of claim 20, wherein said ceramic tip is affixed to a shaft extending from said base.
- 22. The center pin of claim 21 wherein the ceramic tip is affixed to the shaft via threaded mating surfaces.
- 23. The center pin of claim 22, further including means for preventing the threads from loosening.
- 24. The center pin of claim 23, wherein said means for preventing the threads from loosening includes an adhesive.
- 25. The center pin of claim 24, wherein said means for preventing the threads from loosening includes a through hole with a plug inserted therein.
- 26. The center pin of claim 20, wherein said ceramic tip is a cup-shaped tip having a threaded recess therein; and wherein said shoulder has a threaded region thereon for providing a mating surface to the threaded recess in the tip.
- 27. The center pin of claim 20, wherein said ceramic tip is affixed to said base using a mandrel arbor passing therethrough.
- 28. The center pin of claim 27 wherein said mandrel arbor is affixed to the base via threaded mating surfaces.
CROSS REFERENCE
[0001] Priority is claimed from the following related provisional application which is hereby incorporated by reference for its teachings: “CERAMIC CENTER PIN FOR COMPACTION TOOLING AND METHOD FOR MAKING SAME,” Luka Gakovic, Application No. 60/371,816, filed Apr. 11, 2002.
[0002] This application is a continuation-in-part of “CERAMIC CENTER PIN FOR COMPACTION TOOLING AND METHOD FOR MAKING SAME,” Luka Gakovic, Application No. 10/320,331, filed Dec. 16, 2002, which is also hereby incorporated by reference for its teachings.
Provisional Applications (1)
|
Number |
Date |
Country |
|
60371816 |
Apr 2002 |
US |
Continuation in Parts (1)
|
Number |
Date |
Country |
Parent |
10320331 |
Dec 2002 |
US |
Child |
10408431 |
Apr 2003 |
US |