MY163680A - Aluminum alloy substrate for magnetic disk, method of manufacturing aluminum alloy substrate for magnetic disk, and punching press die assembly of aluminum alloy substrate for magnetic disk - Google Patents
Aluminum alloy substrate for magnetic disk, method of manufacturing aluminum alloy substrate for magnetic disk, and punching press die assembly of aluminum alloy substrate for magnetic diskInfo
- Publication number
- MY163680A MY163680A MYPI20053486A MYPI20053486A MY163680A MY 163680 A MY163680 A MY 163680A MY PI20053486 A MYPI20053486 A MY PI20053486A MY PI20053486 A MYPI20053486 A MY PI20053486A MY 163680 A MY163680 A MY 163680A
- Authority
- MY
- Malaysia
- Prior art keywords
- aluminum alloy
- magnetic disk
- alloy substrate
- die assembly
- press die
- Prior art date
Links
Abstract
THE PRESENT INVENTION RELATES TO AN ALUMINUM ALLOY SUBSTRATE (10) FOR A MAGNETIC DISK WITH AN AVERAGE SHEAR DROP HEIGHT AT AN OUTER EDGE EQUAL TO OR LESS THAN 150 µM, AND ITS METHOD OF MANUFACTURE BY PUNCHING A PRESS DIE ASSEMBLY COMPRISING A DIE (20), A PUNCH (30) AND A STRIPPER (31) ALL OF WHICH SERVE TO PUNCH AN ALUMINUM ALLOY RAW STRIP (1) INTO A DOUGHNUT-LIKE SHAPE, AND A DIE SURFACE FOR PUNCHING WHICH HAS A PROJECTION PART (20B) HAVING A FLAT PORTION (12A) OF A PRESCRIBED WIDTH A WITH AN INNER EDGE CONTAINED IN A CUTTING EDGE (20A).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004227304A JP2006048817A (en) | 2004-08-03 | 2004-08-03 | Aluminum alloy substrate for magnetic disk, its manufacturing method and die for punch-pressing aluminum alloy substrate for magnetic disk |
Publications (1)
Publication Number | Publication Date |
---|---|
MY163680A true MY163680A (en) | 2017-10-13 |
Family
ID=36027175
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
MYPI20053486A MY163680A (en) | 2004-08-03 | 2005-07-28 | Aluminum alloy substrate for magnetic disk, method of manufacturing aluminum alloy substrate for magnetic disk, and punching press die assembly of aluminum alloy substrate for magnetic disk |
Country Status (2)
Country | Link |
---|---|
JP (1) | JP2006048817A (en) |
MY (1) | MY163680A (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5064755B2 (en) * | 2006-10-10 | 2012-10-31 | 古河電気工業株式会社 | Circular substrate, circular substrate processing method and processing apparatus |
JP4884915B2 (en) * | 2006-10-11 | 2012-02-29 | 古河電気工業株式会社 | Circular substrate punching press mold and magnetic alloy aluminum alloy substrate manufacturing apparatus |
-
2004
- 2004-08-03 JP JP2004227304A patent/JP2006048817A/en active Pending
-
2005
- 2005-07-28 MY MYPI20053486A patent/MY163680A/en unknown
Also Published As
Publication number | Publication date |
---|---|
JP2006048817A (en) | 2006-02-16 |
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