GB518625A - Improvements relating to the manufacture of thread-cutting taps and the like - Google Patents
Improvements relating to the manufacture of thread-cutting taps and the likeInfo
- Publication number
- GB518625A GB518625A GB2532438A GB2532438A GB518625A GB 518625 A GB518625 A GB 518625A GB 2532438 A GB2532438 A GB 2532438A GB 2532438 A GB2532438 A GB 2532438A GB 518625 A GB518625 A GB 518625A
- Authority
- GB
- United Kingdom
- Prior art keywords
- tap
- spindle
- gauge
- taps
- cutting edge
- 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
- B24B3/18—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of taps or reamers
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Milling, Broaching, Filing, Reaming, And Others (AREA)
Abstract
518,625. Grinding screw-tips &c. BRISTOL AEROPLANE CO., Ltd., and SLADDEN, J. W. Aug. 29, 1938, No. 25324. [Class 60] Taper taps, reamers and like conical milling- cutters are backed off in a machine with a grinding-wheel, whose operative surface is inclined to the axis of the tap, and having means for simultaneously rotating and axially moving the tap. The tap 15 is mounted between centres or between a chuck and a centre on head and tail stocks adjustable on a slide 11 angularly adjustable on a base 10. The tailstock spindle 65 is spring pressed to permit axial movement of the tap and has a releasing lever 71. The headstock spindle is in two parts 24, 25 relatively adjustable angularly and clamped by a nut 29 and conical surfaces 27. To avoid irregularity of backing-off due to irregularity of spacing of the flutes the tap is relocated for each flute by a gauge 61 mounted on a bar 59 carried by a member 37 on the outer spindle part this member also having an operating handle 38. This member is held against a stop 79 in the case of taps for left hand threads in which position the gauge locates the cutting edge in the horizontal plane through the line of centres which also contains the line of tangency of the grinding-wheel, and also a pin 46 carrying a roller 47 is vertical. The inner spindle is now rotated to bring a cutting edge of the tap into contact with the gauge and the two spindle parts are clamped together. A swash plate 53 is set over to an angle depending on the lead of the tap and is clamped at 57. Upward movement of the handle 38 then causes simultaneous rotation and axial advance of the tap. A spring 40. assists the return movement. When right hand thread taps are to be backed off the stop 79 is replaced by the stop'82, the swash plate is inclined in the opposite direction, a gauge engaging above the cutting edge is used, and the handle 38 is moved downwardly. The bevelled flange of the nut 55 may assist in setting the swash plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2532438A GB518625A (en) | 1938-08-29 | 1938-08-29 | Improvements relating to the manufacture of thread-cutting taps and the like |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2532438A GB518625A (en) | 1938-08-29 | 1938-08-29 | Improvements relating to the manufacture of thread-cutting taps and the like |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB518625A true GB518625A (en) | 1940-03-04 |
Family
ID=10225833
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2532438A Expired GB518625A (en) | 1938-08-29 | 1938-08-29 | Improvements relating to the manufacture of thread-cutting taps and the like |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB518625A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2547845A (en) * | 1948-03-04 | 1951-04-03 | Andreasson Rudolf William | Apparatus for relieving the teeth of circular cutting elements |
| US2715805A (en) * | 1953-06-30 | 1955-08-23 | Muller Hans | Cutter relieving holder |
| CN103481192A (en) * | 2013-09-21 | 2014-01-01 | 浙江省平湖市工具厂 | Workpiece turning spindle of screw tap relief-grinding machine |
| CN114650974A (en) * | 2019-09-18 | 2022-06-21 | 麻省理工学院 | Systems, compositions, and methods for making sharp edges |
| CN116276340A (en) * | 2023-03-30 | 2023-06-23 | 成都成量螺纹工具有限公司 | Special tool for grinding screw tip groove of screw tip tap |
-
1938
- 1938-08-29 GB GB2532438A patent/GB518625A/en not_active Expired
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2547845A (en) * | 1948-03-04 | 1951-04-03 | Andreasson Rudolf William | Apparatus for relieving the teeth of circular cutting elements |
| US2715805A (en) * | 1953-06-30 | 1955-08-23 | Muller Hans | Cutter relieving holder |
| CN103481192A (en) * | 2013-09-21 | 2014-01-01 | 浙江省平湖市工具厂 | Workpiece turning spindle of screw tap relief-grinding machine |
| CN114650974A (en) * | 2019-09-18 | 2022-06-21 | 麻省理工学院 | Systems, compositions, and methods for making sharp edges |
| CN114650974B (en) * | 2019-09-18 | 2023-08-29 | 麻省理工学院 | Systems, compositions, and methods for manufacturing sharp edges |
| CN116276340A (en) * | 2023-03-30 | 2023-06-23 | 成都成量螺纹工具有限公司 | Special tool for grinding screw tip groove of screw tip tap |
| CN116276340B (en) * | 2023-03-30 | 2023-10-17 | 成都成量螺纹工具有限公司 | Special tool for grinding screw tip groove of screw tip tap |
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