JPS645759A - Chamfering method for glass disc - Google Patents
Chamfering method for glass discInfo
- Publication number
- JPS645759A JPS645759A JP15907787A JP15907787A JPS645759A JP S645759 A JPS645759 A JP S645759A JP 15907787 A JP15907787 A JP 15907787A JP 15907787 A JP15907787 A JP 15907787A JP S645759 A JPS645759 A JP S645759A
- Authority
- JP
- Japan
- Prior art keywords
- glass disc
- grinding stones
- internal
- chamfering
- advance
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
Abstract
PURPOSE:To improve productivity by turning a glass disc approximately about a center axis, supporting a rotary grinding face having a rotation axis in the same plane as center axis in such a way as to advance and retreat freely and pressing rotary grinding stones for contact with the internal and external edge corners of the glass disc in an aslant direction under a rotating state. CONSTITUTION:A glass disc 2 is turned and grinding stones 51a and 41a for the internal and external surfaces thereof are made in contact with both surfaces of the glass disc 2 under the predetermined force, thereby chamfering internal and external edge corners 22 and 25 on the surface 23 of the glass disc 2. As a result, the entire surface of the grinding stones 41a and 51a can be used for chamfering and it is possible to extend the lifetime thereof and unify a chamfered shape. Also, the grinding stones 41a and 51a can be made to advance and retreat elastically via cushion materials 41c and 51c fitted in the direction of the rotary axes 41e and 51e of the grinding stones 41a and 51a. A deviation in radial and thickness directions, therefore, can be absorbed when the glass disc 2 turns eccentrically, thereby preventing the occurrence of a micro-crack and a fracture.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15907787A JPS645759A (en) | 1987-06-26 | 1987-06-26 | Chamfering method for glass disc |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15907787A JPS645759A (en) | 1987-06-26 | 1987-06-26 | Chamfering method for glass disc |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS645759A true JPS645759A (en) | 1989-01-10 |
Family
ID=15685716
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15907787A Pending JPS645759A (en) | 1987-06-26 | 1987-06-26 | Chamfering method for glass disc |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS645759A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0489645U (en) * | 1991-06-20 | 1992-08-05 | ||
| JPH04346429A (en) * | 1991-05-24 | 1992-12-02 | Shin Etsu Handotai Co Ltd | Mirror-chamfering device of wafer periphery |
| JPH0551553U (en) * | 1991-12-12 | 1993-07-09 | 清 大滝 | Disk polishing and grinding equipment |
| JPH0572361U (en) * | 1992-03-09 | 1993-10-05 | 株式会社八紘エンジニアリング | Work clamp device for lens polishing machine |
| WO2001048752A1 (en) * | 1999-12-27 | 2001-07-05 | 3M Innovative Properties Company | Process for mirror-finishing the edge of a recording disk raw plate |
| US6860795B2 (en) | 2001-09-17 | 2005-03-01 | Hitachi Global Storage Technologies Netherlands B.V. | Edge finishing process for glass or ceramic disks used in disk drive data storage devices |
| JP2009285790A (en) * | 2008-05-29 | 2009-12-10 | Daitron Technology Co Ltd | Machining apparatus |
-
1987
- 1987-06-26 JP JP15907787A patent/JPS645759A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04346429A (en) * | 1991-05-24 | 1992-12-02 | Shin Etsu Handotai Co Ltd | Mirror-chamfering device of wafer periphery |
| JPH0489645U (en) * | 1991-06-20 | 1992-08-05 | ||
| JPH0551553U (en) * | 1991-12-12 | 1993-07-09 | 清 大滝 | Disk polishing and grinding equipment |
| JPH0572361U (en) * | 1992-03-09 | 1993-10-05 | 株式会社八紘エンジニアリング | Work clamp device for lens polishing machine |
| WO2001048752A1 (en) * | 1999-12-27 | 2001-07-05 | 3M Innovative Properties Company | Process for mirror-finishing the edge of a recording disk raw plate |
| US6860795B2 (en) | 2001-09-17 | 2005-03-01 | Hitachi Global Storage Technologies Netherlands B.V. | Edge finishing process for glass or ceramic disks used in disk drive data storage devices |
| US6991521B2 (en) | 2001-09-17 | 2006-01-31 | Hitachi Global Storage Technologies Netherlands B.V. | Edge finishing process for glass or ceramic disks used in disk drive data storage devices |
| CN100379521C (en) * | 2001-09-17 | 2008-04-09 | 日立环球储存科技荷兰有限公司 | Edge finishing process for glass or ceramic disks used in disk drive data storage devices |
| JP2009285790A (en) * | 2008-05-29 | 2009-12-10 | Daitron Technology Co Ltd | Machining apparatus |
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