GB653135A - Improvements in or relating to devices for drilling polygonal holes - Google Patents

Improvements in or relating to devices for drilling polygonal holes

Info

Publication number
GB653135A
GB653135A GB2193348A GB2193348A GB653135A GB 653135 A GB653135 A GB 653135A GB 2193348 A GB2193348 A GB 2193348A GB 2193348 A GB2193348 A GB 2193348A GB 653135 A GB653135 A GB 653135A
Authority
GB
United Kingdom
Prior art keywords
bar
tool
drilling
centre
sides
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
GB2193348A
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.)
HENRY MAURICE MARTIN FISHER
Original Assignee
HENRY MAURICE MARTIN FISHER
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 HENRY MAURICE MARTIN FISHER filed Critical HENRY MAURICE MARTIN FISHER
Priority to GB2193348A priority Critical patent/GB653135A/en
Publication of GB653135A publication Critical patent/GB653135A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B41/00—Boring or drilling machines or devices specially adapted for particular work; Accessories specially adapted therefor
    • B23B41/04—Boring or drilling machines or devices specially adapted for particular work; Accessories specially adapted therefor for boring polygonal or other non-circular holes

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Drilling Tools (AREA)

Abstract

653,135. Drilling polygonal holes. FISHER, H. M M. Aug. 19. 1948. No. 21933. [Class 83 (iii)] A tool for a device for drilling polygonal holes comprises a polygonal bar 10 which has one side less than the number of sides of the required hole, which will just rotate in the hole and which has cutting edges 15 formed on the end, the cutting edges being disposed radially from the centre of the bar to each corner with only one of the edges continued at least as far as the centre, and the other edges terminating short of the centre to permit the provision of chip-clearance channels 20. The tool is used in a device as described in Specification 397,002 or 653,129, in which the tool is rotated and, at the same time, gyrated by stationary guides conforming to the size and shape of the required hole. For drilling a hexagonal hole, five cutting edges 15 are formed on the end of a pentagonal bar 10 by a stepped clearance 16, 17, 18 provided behind each edge and by the chip-clearance grooves 20 in front of each edge. Grooves 22 for removing chips axially along the bar are provided in the sides of the bar adjacent the corners. The sides of the bar may be flat or, to give improved guiding of the tool in the stationary guides, may be slightly convex. A triangular tool for cutting square holes is also described.
GB2193348A 1948-08-19 1948-08-19 Improvements in or relating to devices for drilling polygonal holes Expired GB653135A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2193348A GB653135A (en) 1948-08-19 1948-08-19 Improvements in or relating to devices for drilling polygonal holes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2193348A GB653135A (en) 1948-08-19 1948-08-19 Improvements in or relating to devices for drilling polygonal holes

Publications (1)

Publication Number Publication Date
GB653135A true GB653135A (en) 1951-05-09

Family

ID=10171239

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2193348A Expired GB653135A (en) 1948-08-19 1948-08-19 Improvements in or relating to devices for drilling polygonal holes

Country Status (1)

Country Link
GB (1) GB653135A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2259264A (en) * 1991-09-06 1993-03-10 Kyokuei Kenmakako Kabushiki Ka Drilling brittle material
JP2011200955A (en) * 2010-03-25 2011-10-13 Dijet Industrial Co Ltd Cutting tool
US20150127135A1 (en) * 2013-11-06 2015-05-07 Apple Inc. Methods for machining sharp internal pocket corners with rotating cutting tools
CN115847113A (en) * 2022-12-16 2023-03-28 温州市强杰科技实业有限公司 Nut cutting forming device

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2259264A (en) * 1991-09-06 1993-03-10 Kyokuei Kenmakako Kabushiki Ka Drilling brittle material
GB2259264B (en) * 1991-09-06 1994-06-15 Kyokuei Kenmakako Kabushiki Ka A method of drilling a hole in a hard brittle material and a device therefor
JP2011200955A (en) * 2010-03-25 2011-10-13 Dijet Industrial Co Ltd Cutting tool
US20150127135A1 (en) * 2013-11-06 2015-05-07 Apple Inc. Methods for machining sharp internal pocket corners with rotating cutting tools
CN115847113A (en) * 2022-12-16 2023-03-28 温州市强杰科技实业有限公司 Nut cutting forming device
CN115847113B (en) * 2022-12-16 2023-06-27 温州市强杰科技实业有限公司 Nut cutting forming device

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