WO2001023127A1 - A boring bit - Google Patents
A boring bit Download PDFInfo
- Publication number
- WO2001023127A1 WO2001023127A1 PCT/GB2000/003581 GB0003581W WO0123127A1 WO 2001023127 A1 WO2001023127 A1 WO 2001023127A1 GB 0003581 W GB0003581 W GB 0003581W WO 0123127 A1 WO0123127 A1 WO 0123127A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- boring
- bit
- cutting
- tip
- boring bit
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B51/00—Tools for drilling machines
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27G—ACCESSORY MACHINES OR APPARATUS FOR WORKING WOOD OR SIMILAR MATERIALS; TOOLS FOR WORKING WOOD OR SIMILAR MATERIALS; SAFETY DEVICES FOR WOOD WORKING MACHINES OR TOOLS
- B27G15/00—Boring or turning tools; Augers
Definitions
- the present invention relates to a boring bit and particularly to a boring bit which is capable of right hand and left hand rotation to complete a boring operation.
- the machines used to perform these boring operations are of the Morbidelli type with multi heads and gear boxes connected to slim, quick-release chucks which screw or clamp on to the sides of the shank of the boring bit being used.
- the machines are provided with right and left hand driven chucks.
- a boring bit comprising a shank part and a cylindrical boring part, the boring part having a boring tip, a first longitudinally extending rectilinear grooved cutting channel in the surface of the boring part to form a pair of cutting edges for the boring bit, and a second longitudinally extending rectilinear grooved cutting channel in the surface of the boring part to form an additional pair of cutting edges for the boring bit.
- one of the cutting channels is of shorter longitudinal extent with respect to the boring tip than the other cutting channel.
- the axes of the first and second cutting channels are at 180° to one another around the cylindrical boring part of the bit.
- Fig. 1 (a) and (b) show perspective opposing side views of a boring bit to which the present invention has been applied;
- Fig. 2 (a) and (b) shows perspective opposing side views of a different type of boring bit to which the present invention has been applied.
- Fig. 1 (a) and (b) the invention is shown applied to a boring bit 1 having a shank 2 and a cylindrical cutting or boring part 3.
- the cutting part 3 has a conical boring tip 4 and a longitudinal cutting groove 5 formed in its cutting surface, see Fig. 1 (a).
- the cutting groove 5 is in the form of a rectilinear concave channel extending along the surface of the cutting part 3 to the conical tip 4 to form a pair of trailing rectilinear side cutting edges 5' and a pair of leading side cutting edges 5" which taper to meet at the conical lip 4.
- the trailing edges 5' and the leading edges 5" meet to form a pair of angularly spaced cutting edges 6 lying in a common circumferential plane.
- a further concave channel 7 is formed in the surface of the cutting part 3 of shorter longitudinal extent with respect to the boring tip 4 than the longitudinal channel 5.
- the shorter length channel 7 as with the channel 5 forms two further angularly spaced cutting edges 8 on the same circumference as the two angularly spaced cutting edges 6.
- the channels 5,7 formed in the surface of the cutting part 3 of the boring bits shown are opposed at 180° to one another around the surface of the cutting part 3 of the bit, this is not a limiting feature rather the invention envisages that the longitudinal channels 5,7 in the boring bit may be at other angular dispositions and may be more than two in number.
- Cutting occurs strongly in both rotational directions. A balanced cutting load is produced which reduces the likelihood of producing an oversized hole when used in machinery with worn spindle and chuck systems.
- the size of the hole to be produced is, in most cases, critical.
- a more rigid boring bit is possible both in compression and bending, which assists with hole diameter consistency.
- Cleaner holes both on entry and exit are produced, due to the combined end and side cutting action.
- the lip and spur version is particularly good for exit holes, leaving a clean fibre-free edge eliminating the need for clean-up operations.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Drilling Tools (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU74340/00A AU7434000A (en) | 1999-09-29 | 2000-09-18 | A boring bit |
EP00962692A EP1409184A1 (en) | 1999-09-29 | 2000-09-18 | A boring bit |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9922975.9 | 1999-09-29 | ||
GBGB9922975.9A GB9922975D0 (en) | 1999-09-29 | 1999-09-29 | A boring bit |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2001023127A1 true WO2001023127A1 (en) | 2001-04-05 |
Family
ID=10861771
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/GB2000/003581 WO2001023127A1 (en) | 1999-09-29 | 2000-09-18 | A boring bit |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1409184A1 (en) |
AU (1) | AU7434000A (en) |
GB (1) | GB9922975D0 (en) |
WO (1) | WO2001023127A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2942135A1 (en) * | 2014-05-07 | 2015-11-11 | European Aeronautic Defence and Space Company - EADS France | Method for drilling a stack of materials, drilling bit and drilling device |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1622209A (en) * | 1925-02-27 | 1927-03-22 | Irwin Auger Bit Company | Boring and reaming tool |
US2640379A (en) * | 1951-11-28 | 1953-06-02 | Graves Mark | Drill |
BE785066A (en) * | 1972-06-19 | 1972-10-16 | Gobbers Raymond H M | IMPROVEMENTS TO CUTTING TOOLS AND PROCEDURE FOR MANUFACTURING THESE CUTTING TOOLS. |
GB1401564A (en) * | 1972-10-26 | 1975-07-16 | Tipswitool Evelyn Diesmeier | Reamer-drill |
DE2616663A1 (en) * | 1976-04-15 | 1977-10-27 | Josef Bartmann | Drilling of conical and cylindrical holes in wood, plastics or metal - using bit with conically converging cutting flanks sepd. by continuous slot |
-
1999
- 1999-09-29 GB GBGB9922975.9A patent/GB9922975D0/en not_active Ceased
-
2000
- 2000-09-18 EP EP00962692A patent/EP1409184A1/en not_active Withdrawn
- 2000-09-18 AU AU74340/00A patent/AU7434000A/en not_active Abandoned
- 2000-09-18 WO PCT/GB2000/003581 patent/WO2001023127A1/en not_active Application Discontinuation
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1622209A (en) * | 1925-02-27 | 1927-03-22 | Irwin Auger Bit Company | Boring and reaming tool |
US2640379A (en) * | 1951-11-28 | 1953-06-02 | Graves Mark | Drill |
BE785066A (en) * | 1972-06-19 | 1972-10-16 | Gobbers Raymond H M | IMPROVEMENTS TO CUTTING TOOLS AND PROCEDURE FOR MANUFACTURING THESE CUTTING TOOLS. |
GB1401564A (en) * | 1972-10-26 | 1975-07-16 | Tipswitool Evelyn Diesmeier | Reamer-drill |
DE2616663A1 (en) * | 1976-04-15 | 1977-10-27 | Josef Bartmann | Drilling of conical and cylindrical holes in wood, plastics or metal - using bit with conically converging cutting flanks sepd. by continuous slot |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2942135A1 (en) * | 2014-05-07 | 2015-11-11 | European Aeronautic Defence and Space Company - EADS France | Method for drilling a stack of materials, drilling bit and drilling device |
US9649699B2 (en) | 2014-05-07 | 2017-05-16 | Airbus Group Sas | Method for drilling a stack of materials, drill bit and drilling device |
Also Published As
Publication number | Publication date |
---|---|
GB9922975D0 (en) | 1999-12-01 |
AU7434000A (en) | 2001-04-30 |
EP1409184A1 (en) | 2004-04-21 |
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