WO2008041011A1 - Dispositif d'ajustement de trépan - Google Patents

Dispositif d'ajustement de trépan Download PDF

Info

Publication number
WO2008041011A1
WO2008041011A1 PCT/GB2007/003810 GB2007003810W WO2008041011A1 WO 2008041011 A1 WO2008041011 A1 WO 2008041011A1 GB 2007003810 W GB2007003810 W GB 2007003810W WO 2008041011 A1 WO2008041011 A1 WO 2008041011A1
Authority
WO
WIPO (PCT)
Prior art keywords
drill bit
setting
holder
mounting
bit
Prior art date
Application number
PCT/GB2007/003810
Other languages
English (en)
Other versions
WO2008041011A8 (fr
Inventor
Stuart Harold Turner
Iain Bradfield
Original Assignee
Turner Intellectual Property Limited
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 Turner Intellectual Property Limited filed Critical Turner Intellectual Property Limited
Publication of WO2008041011A1 publication Critical patent/WO2008041011A1/fr
Publication of WO2008041011A8 publication Critical patent/WO2008041011A8/fr

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
    • B24B3/24—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of drills
    • B24B3/247—Supports for drills
    • 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
    • B24B3/24—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of drills
    • B24B3/26—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of drills of the point of twist drills
    • 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
    • B24B41/00—Component parts such as frames, beds, carriages, headstocks
    • B24B41/06—Work supports, e.g. adjustable steadies
    • B24B41/066—Work supports, e.g. adjustable steadies adapted for supporting work in the form of tools, e.g. drills

Definitions

  • the present invention relates to drill bit setting devices.
  • a drill bit In the sharpening of drill bits, a drill bit is presented to an abrasive medium such as a grinding wheel, and it is important that the presentation of the tip of the drill bit is correct relative to the abrasive medium.
  • a drill sharpening apparatus suitable for home use, which includes an abrasive medium in the form of a grinding wheel mounted for rotation within a housing, the apparatus including a holder for a drill bit which is mounted to present the drill bit correctly to the grinding wheel.
  • the apparatus also includes a setting device to permit correct setting of the drill bit within the holder.
  • a drill bit setting device including a holder for holding in use a drill bit substantially in alignment along a longitudinal axis of the bit, first limit means for limiting movement of the bit along the axis, and second limit means for limiting rotational movement of the bit around the axis, the first and second limit means defining a predetermined set position relative to the holder.
  • the first limit means is arranged to receive a tip of the bit to align or maintain alignment of the bit along the axis.
  • the device includes a setting member, which may include both the first and second limit means.
  • the first limit means include a first face, against which in the set position the drill bit may abut.
  • the first face may form at least part of an . annulus, and may slope away from the bit in use in a clockwise direction to form part of a spiral. Possibly, the first face slopes away from the bit in use in a direction inwardly towards the axis.
  • the second iimit means includes a second face, which may project from the first face towards the holder.
  • the first limit member includes two first faces, which may be diametrically opposed.
  • the second limit member includes two second faces, which may be diametrically opposed.
  • the setting member defines an axial recess, which extends along the longitudinal axis and may extend between the first faces.
  • the device includes mounting means for mounting the setting member in a predetermined position relative to the holder.
  • the mounting means include a first mounting for mounting the setting member.
  • the first mounting member releasably mounts the setting member.
  • the mounting means include a second mounting for mounting the holder, and the second mounting may releasably mount the holder.
  • a drill bit setting system including a drill bit setting device including a holder for holding in use a drill bit and mounting means for removably mounting a setting member in a predetermined position relative to the holder, the system including a first setting member and a second setting member, the first and second setting members interchangeably mountable in the mounting means to define different predetermined set positions for different size or different type drill bits relative to the holder.
  • the device includes any of the features described in the preceding statements.
  • the first and second setting members include first and second identification means respectively.
  • the first and second identification means are different.
  • drill bit sharpening apparatus including a drill bit setting device as described above.
  • a setting member for a drill bit setting device as described above.
  • a method of setting a drill bit for sharpening including the steps of positioning a drill bit to be sharpened within a holder, moving the drill bit along a longitudinal axis in the holder until further movement is prevented by first limit means and rotating the drill bit around the longitudinal axis until further movement is substantially prevented by second limit means.
  • the method includes providing a drill bit setting device as described above.
  • Fig. 1 is a side view of a conventional drill bit
  • Fig. 2 is a perspective view of part of a sharpening apparatus in use
  • Fig. 3 is a side schematic view of a drill bit setting device in use
  • Fig. 4 is a side schematic view of the sharpening apparatus in use
  • Fig. 5 is a perspective view of a setting block
  • Fig. 6 is a perspective view of part of the sharpening apparatus in a partially disassembled condition
  • Figs. 7 A to 7D are perspective views of different setting blocks.
  • Fig. 8 is a perspective view of another setting block.
  • Fig. 1 shows a conventional drill bit 10, the drill bit 10 including a shank 12, a pair of spiral flutes 14 being formed in the shank 12, and a tip 15.
  • the tip 15 includes a pair of opposed tip faces 18, a chisel edge 16 extending between the tip faces 18.
  • a leading edge 20 is formed between each tip face
  • drill bits are rotated clockwise into a material to form a hole, the leading edges 20 being the edges which cut into the material.
  • Fig. 2 shows sharpening apparatus 30 which includes a housing 32 which could be formed of a plastics material by moulding.
  • the sharpening apparatus 30 could include a mounting 34 for mounting the housing 32 to a drive motor, and could include a cavity 36 in which in use a grinding wheel is positioned for driving by the drive motor.
  • the sharpening apparatus 30 includes a drill bit setting device 40.
  • the setting device 40 includes mounting means which include a holder mounting 51 and a block mounting 63.
  • the setting device 40 includes a holder 42, which includes a first jaw 44 and a second jaw 46, the first jaw 44 being movable relative to the second jaw 46.
  • a pair of threaded members 48 project upwardly from the second jaw 46 on each side of the first jaw 44 to form a clamping screw.
  • a clamping nut 50 locates the first jaw 44 to the threaded members 48, and is arranged so that as the nut 50 rotates, the first jaw 44 is moved relative to the second jaw 46.
  • the second jaw 46 defines a recess 56 in which a drill bit 10 is receivable, to provide longitudinal alignment of the drill bit 10.
  • the recess 56 could be V-shaped.
  • the holder 42 includes mounting projections 52 which slidably engage within corresponding mounting slots 54 defined by the holder mounting 51.
  • the setting device 40 includes a setting member in the form of a setting block 60.
  • the setting block 60 includes a pair of mounting slots 66 which are slidably engageable with a corresponding pair of mounting projections 64 formed by the block mounting 63.
  • the setting block 60 includes a body 61 which mounts a setting plate 62.
  • the setting plate 62 includes first limit means in the form of a pair of diametrically opposed first faces 70.
  • the first faces 70 together form an annulus around a recess 74 defined by the setting plate 62.
  • Each of the first faces 70 slopes inwardly into the plate 62 from an outer edge of the annulus to an inner edge of the annulus, and also slopes inwardly moving around the annulus in a clockwise direction to form part of a spiral.
  • the setting plate 62 includes second limit means in the form of a pair of diametrically opposed second faces 72 which project outwardly from the first faces 70 at their inwardmost part, each second face 72 being formed between the inwardmost part of one first face 70 and the outwardmost part of the other first face 70.
  • the tool setting device 40 is assembled and used as follows.
  • the setting block 60 is slidably mounted to the block mounting 63
  • the holder 42 is slidably mounted to the holder mounting 51.
  • the holder mounting 51 and the block mounting 63 are integrally formed as part of the housing 32, and therefore provide a fixed, predetermined relationship between the setting block 60 and the holder 42.
  • the holder mounting slots 54 and the block mounting projections 64 extend substantially parallel to each other.
  • a drill bit 10 is positioned within the recess 56 and the clamping nut 50 adjusted to bring the first jaw 44 to act upon the drill bit 10.
  • the first jaw 44 is positioned so that the drill bit 10 is held substantially in alignment along the longitudinal axis 76, but permitting the drill bit 10 to move along the axis 76 and to rotate around the axis 76.
  • a light force is applied to the drill bit 10 for example by a user gripping the drill bit shank 12 and the drill bit 10 is moved along the axis 76 as indicated by arrow A in Fig. 2 until the tip faces 18 contact the first faces 70 of the setting plate 62. In this position, the tip 15 is received between the first faces 70, the chisel edge 16 being received within the recess 74 defined by the setting plate 62.
  • the first faces 70 thus limit movement of the bit 10 along the axis 76, and provide or maintain alignment of the bit 10 along the axis 76.
  • the force is maintained and the drill bit 10 is then rotated clockwise as shown by arrow B in Fig. 2.
  • the tip faces 18 maintain contact with and move along the first faces 70 until the leading edges 20 abut the second faces 72.
  • the second faces 72 thus limit the rotational movement of the bit 10 around the axis 76.
  • the drill bit 10 is now in a set position.
  • the application of the force is continued to maintain the drill bit 10 in the set position, and the clamping nut 50 is adjusted so that the first jaw 44 secures the drill bit 10 in the set position.
  • Fig. 3 shows schematically the setting device 40 in the set position, in which the bit 10 protrudes a predetermined set distance 80 from the holder 42 as set by the setting block 60.
  • the rotational orientation of the bit 10 has also been set to a predetermined orientation in accordance with the position of the second faces 72 of the setting plate 62.
  • the holder 42 with the bit 10 in the set position is now removed from the holder mounting 51 and can now be mounted in a sharpening position, in which the drill bit 10 is presented to a grinding wheel 82 as shown in Fig. 4, the set position ensuring that the drill bit is at the correct presentation of distance 80 and rotational orientation.
  • Figs. 7A to 7D show a plurality of setting blocks 60A 1 6OB, 6OC, 6OD, each setting block 60 including a body 61 which is substantially the same in each case and a setting plate 62A, 62B, 62C, 62D respectively.
  • Differently sized first faces 7OA, 7OB, 7OC, 7OD of different radii are formed in the setting plates 62A, 62B, 62C, 62D correspondingly, to accommodate different size drill bits, and the axial recesses 74A, 74B, 74C, 74D, are also of different radius.
  • the setting block 6OA shown on the left hand side of the drawing has an axial recess 74A and first faces 70A of relatively small radius to accommodate drill bits of relatively small diameter, for example in the range 4.0 to 5.5mm diameter.
  • the setting block 6OD on the right hand side of the drawing has an axial recess 74D and first faces 7OD of relatively large diameter, to accommodate drill bits for example of between 12 to 13mm diameter.
  • the first faces 70 receive the drill tip 15 to provide positive axial alignment of the tip 15. It will be noted that the centre of each of the annular first faces 70 and of the axial recess 74 progressively moves upwards as the first faces 70 and axial recess 74 increase in size, to correspond with the movement of the position of the longitudinal axis 76 of the drill bit 10 in the holder 42 as the drill bit 10 increases in size. It is important that the correct setting block 60 is used for each size drill bit 10, as otherwise the drill bit 10 will be set incorrectly for presentation to the grinding wheel 82.
  • each of the setting blocks 60 is substantially the same in each case, permitting a standard body 61 to be used with different setting B2007/003810
  • the setting plates 62 could include identification means, which could include markings and/or colours, each colour for example denoting a corresponding drill bit size range.
  • Fig. 8 shows a further setting block 60 which includes a body 61 of substantially the same design as previously described and a setting plate 162.
  • the setting plate 162 includes a planar part 86 and a projecting part 84 which projects from the planar part 86.
  • First faces 70 and second faces 72 are formed on the projecting part 84, and the projecting part 84 defines an axial recess 74, the first faces 70, the second faces 72 and the axial recess 74 being similar to those previously described.
  • the setting block 60 of Fig. 8 is used in a similar way to the setting blocks 60 previously described.
  • the projecting part 84 of the setting plate 62 permits the use of drill bits of different configuration.
  • standard drill bits have a 118° drill point angle.
  • standard drill bits have a 135° drill point angle.
  • the difference in drill point angle requires a different set position for the bit 10 to ensure correct presentation to the grinding wheel 82.
  • the setting blocks shown in Figs. 1 to 7 could be suitable for drill bits having a 118° drill point angle
  • the setting block of Fig. 8 could be suitable for a drill bit having a 135° drill point angle.
  • modular setting blocks 60 which are of a standardised size and shape to mount to the block mounting 63 permits use of the setting device 40 for a wide variety of drill bits, while providing simple and accurate setting of the drill bits to ensure correct presentation of the drill bits to the grinding wheel.
  • the setting device 40 could form part of the sharpening apparatus 30 as shown in Fig. 1 , or could be provided separately.
  • the holder and block mountings could be of any suitable design.
  • the holder could be of any suitable design.

Landscapes

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

Abstract

L'invention concerne un dispositif d'ajustement de trépan (40) comprenant un support (42) destiné à soutenir en utilisation un trépan (10) pratiquement aligné le long d'un axe longitudinal (76) du trépan (10). Le dispositif d'ajustement de trépan (40) comprend des premiers moyens de limitation (70) pour limiter le mouvement du trépan (10) le long de l'axe (76) et des seconds moyens de limitation (72) pour limiter le mouvement de rotation du trépan (10) autour de l'axe (76). Les premiers et seconds moyens de limitation (70), (72) définissent une position ajustée prédéterminée relativement au support (42).
PCT/GB2007/003810 2006-10-06 2007-10-05 Dispositif d'ajustement de trépan WO2008041011A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0619758A GB2442790A (en) 2006-10-06 2006-10-06 Drill Bit Setting Device
GB0619758.6 2006-10-06

Publications (2)

Publication Number Publication Date
WO2008041011A1 true WO2008041011A1 (fr) 2008-04-10
WO2008041011A8 WO2008041011A8 (fr) 2008-06-19

Family

ID=37454084

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2007/003810 WO2008041011A1 (fr) 2006-10-06 2007-10-05 Dispositif d'ajustement de trépan

Country Status (2)

Country Link
GB (1) GB2442790A (fr)
WO (1) WO2008041011A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI677403B (zh) * 2018-11-01 2019-11-21 林繼文 適用多種刀具研磨前定位角度可調整之校準夾具

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1577457A1 (de) * 1965-03-08 1970-04-23 Robinson Roland L Befestigung fuer Schneidwerkzeuge
US3952459A (en) * 1974-10-29 1976-04-27 Lisle Corporation Drill grinder
US4084353A (en) * 1976-05-06 1978-04-18 Houdaille Industries, Inc. Spade drill sharpening fixture
WO1997022440A1 (fr) * 1995-12-20 1997-06-26 Turner Intellectual Property Limited Ameliorations relatives a l'affutage de forets

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5788559A (en) * 1994-02-25 1998-08-04 Jungnitsch; Paul Lewis Web adjust drill bit sharpener and method of using

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1577457A1 (de) * 1965-03-08 1970-04-23 Robinson Roland L Befestigung fuer Schneidwerkzeuge
US3952459A (en) * 1974-10-29 1976-04-27 Lisle Corporation Drill grinder
US4084353A (en) * 1976-05-06 1978-04-18 Houdaille Industries, Inc. Spade drill sharpening fixture
WO1997022440A1 (fr) * 1995-12-20 1997-06-26 Turner Intellectual Property Limited Ameliorations relatives a l'affutage de forets

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI677403B (zh) * 2018-11-01 2019-11-21 林繼文 適用多種刀具研磨前定位角度可調整之校準夾具

Also Published As

Publication number Publication date
GB0619758D0 (en) 2006-11-15
WO2008041011A8 (fr) 2008-06-19
GB2442790A (en) 2008-04-16

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