Claims
- 1. A fabrication method of an industrial part having high-aspect-ratio through-hole sections using a punch and a die, comprising:
a first step of drilling a first hole section in a first sheet of sheet material with said punch; a second step of lifting said first sheet in tight contact with a stripper under a condition that said punch is not pulled out from the first hole section; a third step of lifting said punch so that a tip section of said punch is slightly drawn in from a bottom section of said lifted first sheet of sheet material; a fourth step of drilling a second hole section in a second sheet of sheet material with said punch; a fifth step of lifting said second sheet in tight contact with said first sheet under a condition that said punch is not pulled out from the second hole section; and a sixth step of lifting said punch so that a tip section of said punch is slightly drawn in from the bottom section of said lifted second sheet of sheet material; wherein, subsequently, the fourth to sixth steps are repeated for lamination of a plurality of sheets of sheet material.
- 2. A fabrication method of an industrial part having high-aspect-ratio through-hole sections according to claim 1, wherein a spacer is interposed between said die and said stripper when the hole section is drilled with said punch in the first and fourth steps.
- 3. A fabrication method of an industrial part having high-aspect-ratio through-hole sections according to claim 2, wherein a spacer is about 5-15 μm thicker than a total thickness of sheet material present in the die and the stripper.
- 4. A fabrication method of an industrial part having high-aspect-ratio through-hole sections according to claim 1, wherein after the above fourth to sixth steps are repeated for lamination of a desired number of sheets of sheet material, a work-receiving jig is inserted into a space over the die, and laminated sheets of sheet material are transferred to the work-receiving jig.
- 5. A fabrication method of an industrial part having high-aspect-ratio through-hole sections according to claim 1, wherein the method includes:
a step of removing refuse at he first hole section of the first sheet material under a condition that a tip section of the punch is slightly protruded from the bottom section of the first sheet of the sheet material between the second and the third steps, and a step of removing refuse at the second hole section of the second sheet material under a condition that the tip section of the punch is slightly protruded from the bottom section of the second sheet of sheet material.
- 6. A fabrication method of an industrial part having high-aspect-ratio through-hole sections according to claim 5, wherein the refuse is removed by an air-blow means where refuse is removed by a low of compressed air or an adhesion means where refuse is removed by sticking the refuse on an adhesive medium.
- 7. A fabrication method of an industrial part having high-aspect-ratio through-hole sections according to claim 1, wherein the accuracy of a size of said through-hole sections which are drilled in said industrial part is arranged to be similar to that of said hole sections drilled in said one sheet of said sheet material.
- 8. A fabrication method of an industrial part having high-aspect-ratio through-hole sections according to claim 1, wherein the ratio of the diameters, or the shortest distances from one edge to the opposing edge of said through-hole sections to the axial lengths of said sections is approximately, 1:1-1:15.
- 9. A fabrication method of an industrial part having high-aspect-ratio through-hole sections according to claim 1, wherein the ratio of the distance between said through-hole sections adjacent to each other to the axial length of said corresponding sections is approximately 1:1-1:15.
- 10. A fabrication method of an industrial part having high-aspect-ratio through-hole sections according to claim 1, wherein the diameter of said through-hole sections is 100 μm or less.
- 11. A fabrication method of an industrial part having high-aspect-ratio through-hole sections according to claim 1, wherein the distance between said through-hole sections adjacent to each other is 100 μm or less.
- 12. A fabrication method of an industrial part having high-aspect-ratio through-hole sections according to claim 1, wherein said sheet material is used with a bonding agent previously applied thereto.
- 13. A fabrication method of an industrial part having high-aspect-ratio through-hole sections according to claim 1, further comprising a step of inserting a bonding sheet between said first sheet of sheet material and said second sheet of sheet material.
Priority Claims (4)
Number |
Date |
Country |
Kind |
2000-218378 |
Jul 2000 |
JP |
|
2000-280573 |
Sep 2000 |
JP |
|
2001-076832 |
Mar 2001 |
JP |
|
2001-131490 |
Apr 2001 |
JP |
|
CROSS-REFERENCE OF RELATED APPLICATION
[0001] The present invention is a Continuation-in-Part Application of the pending U.S. patent application Ser. No. 09/771,223 filed on Jan. 26, 2001.
Continuation in Parts (1)
|
Number |
Date |
Country |
Parent |
09771223 |
Jan 2001 |
US |
Child |
09883133 |
Jun 2001 |
US |