GB223947A - Improvements in or relating to the manufacture of drills and similar tools - Google Patents
Improvements in or relating to the manufacture of drills and similar toolsInfo
- Publication number
- GB223947A GB223947A GB1457923A GB1457923A GB223947A GB 223947 A GB223947 A GB 223947A GB 1457923 A GB1457923 A GB 1457923A GB 1457923 A GB1457923 A GB 1457923A GB 223947 A GB223947 A GB 223947A
- Authority
- GB
- United Kingdom
- Prior art keywords
- bar
- drills
- shanks
- tempering
- severed
- 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
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B23P15/28—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass cutting tools
- B23P15/32—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass cutting tools twist-drills
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
223,947. Vickers, Ltd., and Smith, R. L. June 2, 1923. Drills, boring and like tools are made in pairs by hardening and tempering a bar and severing it at the middle, the severed ends being subsequently pointed and the usual cutting-edges formed. The shanks may be integral with the bar or may be electrically welded thereto. The drills may be made by twisting a profiled bar of double-drill length, Battening the ends and electrically welding thereto the shanks, after which the bar is annealed, straightened and turned. The flutes are then milled and the bar hardened and tempered. The bar is then severed by an emery-wheel &c. and the drill pointed and ground to finished size. The heating for tempering &c. may be effected by a low-voltage electric current and may be carried out in a combined electric welding and heating machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1457923A GB223947A (en) | 1923-06-02 | 1923-06-02 | Improvements in or relating to the manufacture of drills and similar tools |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1457923A GB223947A (en) | 1923-06-02 | 1923-06-02 | Improvements in or relating to the manufacture of drills and similar tools |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB223947A true GB223947A (en) | 1924-11-03 |
Family
ID=10043752
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1457923A Expired GB223947A (en) | 1923-06-02 | 1923-06-02 | Improvements in or relating to the manufacture of drills and similar tools |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB223947A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105081709A (en) * | 2015-09-30 | 2015-11-25 | 天津第一机床总厂 | Machining method for large bent top tool rest part |
-
1923
- 1923-06-02 GB GB1457923A patent/GB223947A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105081709A (en) * | 2015-09-30 | 2015-11-25 | 天津第一机床总厂 | Machining method for large bent top tool rest part |
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