GB638349A - Grinding appliance for twist drills - Google Patents
Grinding appliance for twist drillsInfo
- Publication number
- GB638349A GB638349A GB11360/46A GB1136046A GB638349A GB 638349 A GB638349 A GB 638349A GB 11360/46 A GB11360/46 A GB 11360/46A GB 1136046 A GB1136046 A GB 1136046A GB 638349 A GB638349 A GB 638349A
- Authority
- GB
- United Kingdom
- Prior art keywords
- drill
- bar
- grinding
- block
- ground
- 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.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B3/00—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools
- B24B3/24—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of drills
- B24B3/247—Supports for drills
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
638,349. Grinding twist drills. GANZ, J. April 12, 1946, No. 11360. Convention date, April 13, 1945. [Class 60] An appliance for grinding twist drills is characterized in that the support for the drill to be ground comprises a bar of circular cross-section including a longitudinal groove of angular form with plane faces to take the drill to be ground and positioned obliquely in relation to the grinding surface to grind the point of the drill to a required cone angle, said bar being so mounted that a clearance is ground behind the cutting edge by a swinging movement of the bar. A drill 13 is held in a longitudinal angular groove 5 in a cylindrical bar 3 by a clamping spring 15, Fig. 3, tensioned by a nut 16, and is adjustable therealong by a step member 18, an inclined positioning lip 10 on the bar 3 bearing against a cutting edge of the drill. The bar 3 is secured adjustably about its own axis to determine the correct clearance angle, in a head 24, and the head 24 is rocked about an axis 25 in a block 26 for backing off by a grinding-wheel 1, a stop pin 34 engaging in a recess 35 in the block 26 limiting said backing off. The block 26, and with it the bar 3 and the drill, is pivotable about a vertical axis 28 to allow the bar support 3 to be moved away from the grinding-wheel for the insertion of a drill to be ground, a stop-pin 33 on the block 26 engaging a fixed stop-plate 32 to determine the working position, the position of the axis 25 determining the cone angle of the drill point.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH638349X | 1945-04-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB638349A true GB638349A (en) | 1950-06-07 |
Family
ID=4525244
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB11360/46A Expired GB638349A (en) | 1945-04-13 | 1946-04-12 | Grinding appliance for twist drills |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB638349A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001047665A1 (en) * | 1999-12-23 | 2001-07-05 | Erwin Junker Maschinenfabrik Gmbh | Method and device for grinding fluted tools |
| CN114633155A (en) * | 2022-02-23 | 2022-06-17 | 河南中烟工业有限责任公司 | Grinding explorator and grinding device for twist drill |
-
1946
- 1946-04-12 GB GB11360/46A patent/GB638349A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001047665A1 (en) * | 1999-12-23 | 2001-07-05 | Erwin Junker Maschinenfabrik Gmbh | Method and device for grinding fluted tools |
| CN114633155A (en) * | 2022-02-23 | 2022-06-17 | 河南中烟工业有限责任公司 | Grinding explorator and grinding device for twist drill |
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