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WO2003057437A1 - Trepan - Google Patents

Trepan Download PDF

Info

Publication number
WO2003057437A1
WO2003057437A1 PCT/GB2003/000087 GB0300087W WO03057437A1 WO 2003057437 A1 WO2003057437 A1 WO 2003057437A1 GB 0300087 W GB0300087 W GB 0300087W WO 03057437 A1 WO03057437 A1 WO 03057437A1
Authority
WO
WIPO (PCT)
Prior art keywords
drill bit
cutting
bit according
crown
axially
Prior art date
Application number
PCT/GB2003/000087
Other languages
English (en)
Inventor
Anthony Davies
Han Shui Xiang
Original Assignee
Tcl Supplies Ltd.
Hangzhou Xiaoshan Jiajia Tools 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 Tcl Supplies Ltd., Hangzhou Xiaoshan Jiajia Tools Co.,Ltd filed Critical Tcl Supplies Ltd.
Priority to GB0415126A priority Critical patent/GB2398753B/en
Priority to AU2003202661A priority patent/AU2003202661A1/en
Publication of WO2003057437A1 publication Critical patent/WO2003057437A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B51/00—Tools for drilling machines
    • B23B51/04—Drills for trepanning
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B51/00—Tools for drilling machines
    • B23B51/04—Drills for trepanning
    • B23B51/0426—Drills for trepanning with centering devices
    • 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 high performance and versatile drill bit, for drilling
  • Conventional drill bits such as flat drill bits and twist drill bits, comprise cutting
  • Drill bits are known that have the ability to cut in three directions.
  • It comprises a crown having two forward (axial) cutting edges, two side
  • edges enables the cutting of grooves, recesses and curved bores, in addition to straight
  • the present invention provides a new highly versatile drill bit with a cutting blade
  • the present invention provides a drill bit comprising a crown and a
  • a drill bit wherein the crown comprises an odd number of cutting blades.
  • an embodiment of a drill bit according to the present invention provides a
  • the crown comprises three cutting blades. More preferably the three
  • cutting blades are disposed from the longitudinal axis of the drill bit at an angle of
  • each three cutting blade is
  • each cutting blade comprises a first axially cutting face, a radially
  • each cutting face and a second axially cutting face. More preferably each cutting face
  • first axially cutting face having a first axially cutting edge that bisects a radius of the
  • the first axially cutting edge trails the radius of the crown
  • trailing edge of the first axially cutting face lies on a radius of the crown.
  • the cutting blade having a wing.
  • the wing is wedge shaped. More preferably
  • the wing extends circumferentially from the end of each blade distal to the central
  • the wing has a curved outer face.
  • each wing extends circumferentially from the face of a blade adjacent the first axially cutting edge and the projecting edge of each wing forms a
  • each cutting blade is provided with a wedge shaped tooth that projects from
  • the blade in an axial direction to a greater extent than the first axially cutting face.
  • tooth tapers More preferably the tooth tapers to form a third axially cutting edge. Even more
  • the third axially cutting edge is provided proximal to the first axially cutting
  • the third axially cutting edge is curved from a first end where it
  • invention has a crown that comprises an axial tapered cutting tip positioned on the
  • tip is tapered at an angle of about 20° to about 40°. Even more preferably the cutting
  • the cutting tip tapers at an angle of about 25° to about 35°. Even more preferably the cutting tip
  • the tapered cutting tip is pyramidal and has three sides which are tapered at
  • an embodiment of a first aspect of the present invention comprises an
  • the attachment portion is of a wider diameter than the shank.
  • the collar has a rough texture for providing grip.
  • TiN0 3 titanium nitrate
  • drill bit comprising 1060 high carbon steel and is of the hardness HRC 45-55.
  • a further advantage is that the cutting blades are more stable while cutting, thereby
  • a further advantage of the present invention is that it provides a drill bit that has a
  • reaction force or angular friction
  • cutting blades of known drill bits are positioned so that they precede the radius, rather
  • the tapered cutting tip of the present invention preferably has three sides and comes to a sharp point. It is less likely to slip than the
  • An advantage of the present invention is that it provides a drill bit comprising a TiN0 3
  • a TiN0 3 coating provides an increase in the hardness of the drill surface.
  • a further advantage of a TiN0 3 coating is a reduction of friction, thereby favourably
  • coating are that it serves to inhibit corrosion and provides an attractive shiny finish to
  • Figure 1 shows a side view of a preferred embodiment of a drill bit according to the
  • Figure 2 shows an end view of three cutting blades of a crown of a preferred
  • Figure 3 shows a view along the longitudinal axis of a preferred embodiment of the
  • reaction force pointing into a channel are shown.
  • Figure 4 shows a view along the longitudinal axis of a drill bit where the blades
  • reaction force pointing out of a channel are shown.
  • FIG. 1 A preferred embodiment of a drill bit according to the invention is shown in figures 1
  • the drill bit comprises a crown (6); a shank (7) which extends from the crown
  • the drill bit has a TiN0 3
  • the shank (7) is coaxial with the crown (6) and is of significantly smaller diameter
  • the crown (6) comprises a cutting tip (1) on its central longitudinal axis.
  • the cutting tip (1) on its central longitudinal axis.
  • tip (1) comprises a pyramid having a base and three sides each tapered to a 30° point.
  • the crown (6) comprises three identical cutting blades which extend
  • the cutting blades are radially from the central longitudinal axis of the crown.
  • Each cutting blade comprises a first axially cutting face having a first axially cutting
  • the first and second axially cuttmg faces oppose each other and the first and second
  • cutting edges are for cutting in opposite directions.
  • the face bisects a radial plane of the crown at an angle of about 5° to about 10°.
  • the second axially cutting face bisects an axial plane of the crown at an angle
  • each cutting blade comprises a wedge shaped wing that extends
  • Each wing extends circumferentially from the face of a blade adjacent the crown.
  • each wing forms a radially cutting
  • the radial cutting edge (4) bisects an axial plane of the crown (6) at an angle
  • the radially outer face of the wing bisects a circumferential plane at an angle of 3° so
  • each cutting blade comprises a wedge shaped tooth located atop the join
  • Each tooth has a third axially cutting
  • the third axially cutting edge (3) is
  • cutting edge is curved from a first end where it meets the radially cutting edge to a

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Drilling Tools (AREA)
  • Earth Drilling (AREA)

Abstract

L'invention concerne un trépan polyvalent de haute performance qui est destiné à diverses applications telles que : perçage de puits de forage arrondis, fraisage, fraisurage, etc. Ce trépan comprend une couronne a diamant (6), qui comporte au moins trois lames racleuses, depuis laquelle s'étend une tige (7).
PCT/GB2003/000087 2002-01-14 2003-01-14 Trepan WO2003057437A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB0415126A GB2398753B (en) 2002-01-14 2003-01-14 Drill bit
AU2003202661A AU2003202661A1 (en) 2002-01-14 2003-01-14 Drill bit

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0200694A GB2388803B (en) 2002-01-14 2002-01-14 Drill bit
GB0200694.8 2002-01-14

Publications (1)

Publication Number Publication Date
WO2003057437A1 true WO2003057437A1 (fr) 2003-07-17

Family

ID=9929002

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2003/000087 WO2003057437A1 (fr) 2002-01-14 2003-01-14 Trepan

Country Status (3)

Country Link
AU (1) AU2003202661A1 (fr)
GB (2) GB2388803B (fr)
WO (1) WO2003057437A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6410725B1 (en) * 1999-02-26 2002-06-25 Myriad Genetics Inc. Method for extracting DNA from dried specimens

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1446194A (en) * 1922-05-20 1923-02-20 John T Mccullough Cutter
GB857366A (en) * 1958-02-24 1960-12-29 Crucible Steel Co America Alloy steel
US3988955A (en) * 1972-12-14 1976-11-02 Engel Niels N Coated steel product and process of producing the same
EP0181841A2 (fr) * 1984-08-08 1986-05-21 Jansson, Sonja Foret
GB2219229A (en) * 1988-05-03 1989-12-06 Kwo Werkzeuge Gmbh Drill bit
EP0418077A2 (fr) * 1989-09-13 1991-03-20 Vermont American Corporation Foret pour percer en ligne courbe
EP1034866A2 (fr) * 1999-03-10 2000-09-13 TIGRA Hartstoff GmbH Ebauche pour fraise à queue en materiau dur
US20010031180A1 (en) * 1999-12-10 2001-10-18 Vasudeva Kailash C. Drill bit for non-linear drilling
US6325806B1 (en) * 1995-10-30 2001-12-04 Biomedical Enterprises, Inc. Materials collection system and uses thereof

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US949126A (en) * 1909-04-28 1910-02-15 Michael H Lyons Cutter-head.
GB540073A (en) * 1940-07-22 1941-10-03 Ferranti Ltd Improvements in or relating to metal drills
GB684988A (en) * 1950-07-15 1952-12-31 Smith And Westwood Ltd Improvements in and relating to drill bits
DE9101623U1 (de) * 1990-02-13 1991-05-23 Giess & Quanz Gmbh, 5630 Remscheid Spanendes Werkzeug

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1446194A (en) * 1922-05-20 1923-02-20 John T Mccullough Cutter
GB857366A (en) * 1958-02-24 1960-12-29 Crucible Steel Co America Alloy steel
US3988955A (en) * 1972-12-14 1976-11-02 Engel Niels N Coated steel product and process of producing the same
EP0181841A2 (fr) * 1984-08-08 1986-05-21 Jansson, Sonja Foret
GB2219229A (en) * 1988-05-03 1989-12-06 Kwo Werkzeuge Gmbh Drill bit
EP0418077A2 (fr) * 1989-09-13 1991-03-20 Vermont American Corporation Foret pour percer en ligne courbe
US6325806B1 (en) * 1995-10-30 2001-12-04 Biomedical Enterprises, Inc. Materials collection system and uses thereof
EP1034866A2 (fr) * 1999-03-10 2000-09-13 TIGRA Hartstoff GmbH Ebauche pour fraise à queue en materiau dur
US20010031180A1 (en) * 1999-12-10 2001-10-18 Vasudeva Kailash C. Drill bit for non-linear drilling

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6410725B1 (en) * 1999-02-26 2002-06-25 Myriad Genetics Inc. Method for extracting DNA from dried specimens

Also Published As

Publication number Publication date
GB2388803B (en) 2005-11-02
GB0200694D0 (en) 2002-02-27
GB0415126D0 (en) 2004-08-11
GB2398753A (en) 2004-09-01
AU2003202661A1 (en) 2003-07-24
GB2398753B (en) 2006-02-08
GB2388803A (en) 2003-11-26

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