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 like

Info

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
Application number
GB2532438A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JOHN WILLIAM SLADDEN
Bristol Aeroplane Co Ltd
Original Assignee
JOHN WILLIAM SLADDEN
Bristol Aeroplane Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by JOHN WILLIAM SLADDEN, Bristol Aeroplane Co Ltd filed Critical JOHN WILLIAM SLADDEN
Priority to GB2532438A priority Critical patent/GB518625A/en
Publication of GB518625A publication Critical patent/GB518625A/en
Expired legal-status Critical Current

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.
GB2532438A 1938-08-29 1938-08-29 Improvements relating to the manufacture of thread-cutting taps and the like Expired GB518625A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (7)

* Cited by examiner, † Cited by third party
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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