US20050139396A1 - Fixing arrangement - Google Patents
Fixing arrangement Download PDFInfo
- Publication number
- US20050139396A1 US20050139396A1 US10/504,348 US50434804A US2005139396A1 US 20050139396 A1 US20050139396 A1 US 20050139396A1 US 50434804 A US50434804 A US 50434804A US 2005139396 A1 US2005139396 A1 US 2005139396A1
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- US
- United States
- Prior art keywords
- cutting tooth
- shaft
- arrangement according
- securing arrangement
- drill bit
- 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.)
- Abandoned
Links
- 238000005520 cutting process Methods 0.000 claims abstract description 74
- 239000000463 material Substances 0.000 claims description 18
- 230000002093 peripheral effect Effects 0.000 abstract 1
- 238000003780 insertion Methods 0.000 description 5
- 230000037431 insertion Effects 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 230000000717 retained effect Effects 0.000 description 3
- 230000036346 tooth eruption Effects 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000005266 casting Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/62—Drill bits characterised by parts, e.g. cutting elements, which are detachable or adjustable
- E21B10/627—Drill bits characterised by parts, e.g. cutting elements, which are detachable or adjustable with plural detachable cutting elements
- E21B10/633—Drill bits characterised by parts, e.g. cutting elements, which are detachable or adjustable with plural detachable cutting elements independently detachable
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
- E21B10/48—Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of core type
- E21B10/485—Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of core type with inserts in form of chisels, blades or the like
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/60—Drill bits characterised by conduits or nozzles for drilling fluids
- E21B10/605—Drill bits characterised by conduits or nozzles for drilling fluids the bit being a core-bit
Definitions
- This invention relates to a securing arrangement for retaining a cutting tooth on a drill bit, wherein the cutting tooth has a tool head and a shaft, the shaft is accommodated in a shaft receiver of the drill bit or of a holder which is connected to the drill bit, and the cutting tooth rests on support faces of the drill bit with one or a plurality of contact faces.
- the drill bit includes pocket-shaped notches, into which each base part is welded.
- the base part has a shaft receiver, which is tapered.
- the shaft of the cutting tooth can be inserted into the shaft receiver.
- the shaft has a conical outer outline.
- a spring cotter is used to secure the cone connection and connects the base part to the shaft.
- the drill bit includes a shoulder which is offset relative to the contact faces in the direction of the axis of the drill bit and is associated with and spaced from the cutting tooth.
- the cutting forces occurring during the cutting operation can be absorbed mostly via the inclined support faces.
- This type of supporting, in interaction with the space makes it possible for the shaft of the cutting tooth to be substantially free of the cutting forces and reduces the danger of the tool breaking. Also, the space also makes it possible for the cutting tooth to be adjusted if the support face of the drill bit and/or the contact face of the cutting tooth becoming worn.
- the shaft receiver is admitted partially into the shoulder face, which is formed by the shoulder and faces the cutting tooth.
- a particularly sturdy support of the cutting tooth is produced when the drill bit provides two contact faces for each cutting tooth, and the two contact faces are set opposite one another.
- the securing arrangement is configured advantageously so that, at least over a portion of its longitudinal region, which extends in the direction of the axis of the drill bit, the shaft of the cutting tooth is surrounded around the circumference completely by the shaft receiver. At the same time, a lateral deviation of the cutting tooth is prevented in a secure manner.
- the shaft of the cutting tooth includes at least one calibrating receiver, which is set back relative to the inner wall of the shaft receiver. In this case, the cutting tooth can then be produced true to measurement in the region of its shaft. Superfluous material can be used in the region of the calibrating receiver.
- the shaft of the cutting tooth is tapered at least over a portion of its longitudinal extension in the direction of its free end.
- the shaft receiver is also tapered at least in a regional manner, and an outside cross-section of the shaft is smaller than the inside cross-section of the shaft receiver. This arrangement simplifies the mounting of the cutting tooth into the shaft receiver. If the tool head of the cutting tooth includes one or a plurality of radial recesses in its region directed radially inwards, then material pockets are formed on the cutting tooth. Residue material collects in the pockets and forms a layer for protection against wear.
- the tool head is closed at its circumferential end region with triangular, convexly curved shaped faces.
- the hard material elements are admitted into a web, which is disposed in a region of the cutting tooth lying radially outwards and which extends in the direction of the axis of the drill bit and protrudes above a base part of the cutting tooth.
- the hard material elements protrude in a regional manner in the radial direction above the web.
- the hard material elements form calibrating pins, which constantly free-cut the cutting tooth in the drill hole.
- the tool head of the cutting tooth includes a top face, into which a hard material insert, such as a hard metal insert, is inserted.
- FIG. 1 is a side view of a drill bit
- FIG. 2 is a perspective view of the drill bit in FIG. 1 ;
- FIG. 3 is a vertical section view of the drill bit
- FIG. 4 is a detailed representation taken from the view shown in FIG. 3 ;
- FIG. 5 is a side perspective view of a cutting tooth
- FIG. 6 is a rear perspective view of the cutting tooth shown in FIG. 5 ;
- FIG. 7 is a section view taken through the shaft of the cutting tooth as shown in FIGS. 5 and 6 .
- FIGS. 1 and 2 show a drill bit 10 , produced in one piece from a casting that is annular and has a base body 11 .
- the base body 11 On a lower edge, the base body 11 has a securing ring 19 , which is in the form of a mounting.
- mounting projections 21 are integrally formed around the circumference on the base body 11 .
- the mounting projections 21 in this case, are spaced equally from one another so that a space 16 is produced.
- the base body 11 has webs 15 between the mounting projections 21 .
- the webs 15 each form an end face, which extends in the radial direction. All end faces of the webs 15 rest on a common plane. Inclined faces 18 proceed from the end faces at angle.
- the inclined faces 18 are facing the interior, which is surrounded by the drill bit 10 .
- the end faces and the inclined faces 18 pass over at their circumferential ends into deflecting faces 26 of the mounting projections 21 .
- the deflecting faces 26 project above the end faces in the direction of the axis of the drill bit.
- the deflecting faces 26 each pass over into a roof portion 25 that passes over into a support face 24 .
- the support face 24 in this case, is disposed at an angle to the horizontal.
- the two support faces 24 of one mounting projection 21 in this case, are aligned opposite one another and are part of a tool receiver 20 .
- the tool receiver 20 has a shaft receiver 22 , which has an oval cross-section, with an insertion channel 22 .
- the insertion channel 22 . 1 ends in an opening 12 and is machined into the base body 11 in the shape of a window.
- the opening 12 in this case, is developed so that it widens outwardly in a continuous manner proceeding from the inner wall 17 . 1 of the base body 11 .
- FIGS. 2 and 4 The disposition and development of the insertion channel 22 . 1 and of the opening 12 is shown in FIGS. 2 and 4 .
- cutting teeth 30 can be inserted into the tool receiver 20 .
- FIGS. 5 to 7 The development of the cutting teeth 30 is shown in FIGS. 5 to 7 .
- the cutting teeth 30 have a tool head 31 , on which a shaft is integrally formed.
- the tool head 31 has hard metal inserts 35 .
- the shaft 32 has a threaded portion 33 .
- the cutting tooth 30 is inserted with its shaft 32 into the insertion channel 22 . 1 . In the installed state, the cutting tooth 30 rests with corresponding mating faces on the support faces 24 .
- the threaded portion 33 extends into the region of the opening 12 , so that a nut 34 can be screw-connected.
- the cutting tooth 30 can be tensioned on the support faces 24 with the nut 34 .
- As the cross-sectional geometry of the shaft 32 of the cutting tooth 30 is adapted to the outline of the insertion channel 22 . 1 , it is retained in a non-rotatable manner.
- the cutting tooth 30 has two shaped faces 36 , which pass over into the deflecting faces 26 of the support parts 25 in a seamless manner.
- projections 13 are disposed on the outer face of the base body 11 and have elements 14 produced from hard metal for protection against wear.
- the base body 11 also has projections 17 . 2 which extend into the interior of the drill bit 10 and optimize protection against wear at that location.
- FIGS. 5 to 7 provide a more detailed representation of one embodiment of a cutting tooth 30 .
- the cutting tooth 30 has a tool head 31 , on which a shaft 32 is integrally formed via a rounding transition.
- the shaft 32 ends at the end remote from the tool head 31 , in a threaded portion 33 .
- the tool head 31 has an upper top face 31 . 1 , into which a hard metal insert 35 is admitted.
- a web 37 . 1 , 37 . 2 proceeds from the top face 31 . 1 at both the front and the rear.
- the top face 31 . 1 passes over into a steeply descending concavely curved wall 38 . 2 which is divided longitudinally by two ribs 38 and the web 37 . 1 .
- the ribs 38 and the web 37 . 1 form recesses 38 . 1 , which serve as material pockets for accommodating residue material.
- FIG. 6 at the rear the top face passes over into a wall 38 . 3 , which extends parallel to the axis of rotation of the drill bit 10 .
- the wall 38 . 3 supports the web 37 . 2 .
- the web 37 . 2 has hard material elements 39 . 3 that protrude above the web 37 . 2 .
- the walls 38 . 2 and 38 . 3 pass over into one another at the sides of the cutting tooth 30 by shaped faces 36 that are triangular and are convexly curved.
- the shaft 32 is adjacent to a base part 39 of the tool head 31 .
- the shaft 32 has an oval cross-section, as shown in FIG. 7 .
- the shaft 32 forms calibrating receiver 31 . 1 on the two longitudinal sides.
- Flat regions 32 . 2 are provided at the side of the shaft 32 and serve the calibration. Consequently, four true to measurement shaft regions can be forged between the calibrating receiver 31 . 1 and the flat regions 32 . 2 .
- the shaft regions prevent the shaft 32 from jamming when inserted into the shaft receiver 22 .
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- Engineering & Computer Science (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Drilling Tools (AREA)
- Milling Processes (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
A fixing arrangement for holding a cutting tooth on a cutter. The cutting tooth has a tool head and a shank. The shank is accommodated in a shank-receiving element of the cutter or a holder connected to the cutter. One or several bearing surfaces of the cutting tooth each lies on support surfaces of the cutter. The cutting tooth can be supported in a stable and reliable manner by inclining the support surfaces and the bearing surfaces in a peripheral direction and by providing the cutter with a shoulder which is arranged in the direction of the cutter in an offset position relative to the bearing surfaces, the shoulder being associated with the cutting tooth at a distance.
Description
- 1. Field of the Invention
- This invention relates to a securing arrangement for retaining a cutting tooth on a drill bit, wherein the cutting tooth has a tool head and a shaft, the shaft is accommodated in a shaft receiver of the drill bit or of a holder which is connected to the drill bit, and the cutting tooth rests on support faces of the drill bit with one or a plurality of contact faces.
- 2. Discussion of Related Art
- A securing arrangement is known from European Patent Reference EP 0 439 821 A 1. In this case, the drill bit includes pocket-shaped notches, into which each base part is welded. The base part has a shaft receiver, which is tapered. The shaft of the cutting tooth can be inserted into the shaft receiver. To create a cone connection, the shaft has a conical outer outline. A spring cotter is used to secure the cone connection and connects the base part to the shaft.
- In operation, particularly where the loads are jerky and intermittent, the cone connection can become worn. The cutting tooth is then no longer retained without play and this leads to a heavy increase in wear until the tool finally breaks.
- It is one object of this invention to provide a securing arrangement of the type mentioned above but where the cutting tooth is retained on the drill bit in a secure manner.
- This object is achieved with support faces and contact faces that are set to be inclined in a circumferential direction. The drill bit includes a shoulder which is offset relative to the contact faces in the direction of the axis of the drill bit and is associated with and spaced from the cutting tooth. The cutting forces occurring during the cutting operation can be absorbed mostly via the inclined support faces. This type of supporting, in interaction with the space, makes it possible for the shaft of the cutting tooth to be substantially free of the cutting forces and reduces the danger of the tool breaking. Also, the space also makes it possible for the cutting tooth to be adjusted if the support face of the drill bit and/or the contact face of the cutting tooth becoming worn.
- According to a preferred embodiment of this invention, the shaft receiver is admitted partially into the shoulder face, which is formed by the shoulder and faces the cutting tooth. A particularly sturdy support of the cutting tooth is produced when the drill bit provides two contact faces for each cutting tooth, and the two contact faces are set opposite one another. When the securing arrangement is developed so that the cutting tooth includes a threaded portion, which is mounted on the shaft, a nut is screw-connectable to the threaded portion, and the cutting tooth is pressed onto the support faces via the contact faces in a pre-tensioned manner by the nut, so that the shaft can then build up an initial tensioning, which absorbs even intermittent, jerky tool loads in a secure manner without loosening of the threaded connection.
- The securing arrangement is configured advantageously so that, at least over a portion of its longitudinal region, which extends in the direction of the axis of the drill bit, the shaft of the cutting tooth is surrounded around the circumference completely by the shaft receiver. At the same time, a lateral deviation of the cutting tooth is prevented in a secure manner. In this case, the shaft of the cutting tooth includes at least one calibrating receiver, which is set back relative to the inner wall of the shaft receiver. In this case, the cutting tooth can then be produced true to measurement in the region of its shaft. Superfluous material can be used in the region of the calibrating receiver.
- In one embodiment of this invention, the shaft of the cutting tooth is tapered at least over a portion of its longitudinal extension in the direction of its free end. The shaft receiver is also tapered at least in a regional manner, and an outside cross-section of the shaft is smaller than the inside cross-section of the shaft receiver. This arrangement simplifies the mounting of the cutting tooth into the shaft receiver. If the tool head of the cutting tooth includes one or a plurality of radial recesses in its region directed radially inwards, then material pockets are formed on the cutting tooth. Residue material collects in the pockets and forms a layer for protection against wear.
- An improved cutting performance is provided if the tool head is closed at its circumferential end region with triangular, convexly curved shaped faces. In addition, the hard material elements are admitted into a web, which is disposed in a region of the cutting tooth lying radially outwards and which extends in the direction of the axis of the drill bit and protrudes above a base part of the cutting tooth. The hard material elements protrude in a regional manner in the radial direction above the web. The hard material elements form calibrating pins, which constantly free-cut the cutting tooth in the drill hole.
- To improve the cutting performance even further, at a region remote from the shaft, the tool head of the cutting tooth includes a top face, into which a hard material insert, such as a hard metal insert, is inserted.
- This invention is described in detail in view of an embodiment represented in the drawings, wherein:
-
FIG. 1 is a side view of a drill bit; -
FIG. 2 is a perspective view of the drill bit inFIG. 1 ; -
FIG. 3 is a vertical section view of the drill bit; -
FIG. 4 is a detailed representation taken from the view shown inFIG. 3 ; -
FIG. 5 is a side perspective view of a cutting tooth; -
FIG. 6 is a rear perspective view of the cutting tooth shown inFIG. 5 ; and -
FIG. 7 is a section view taken through the shaft of the cutting tooth as shown inFIGS. 5 and 6 . -
FIGS. 1 and 2 show adrill bit 10, produced in one piece from a casting that is annular and has abase body 11. On a lower edge, thebase body 11 has a securingring 19, which is in the form of a mounting. On a side remote from thesecuring ring 19,mounting projections 21 are integrally formed around the circumference on thebase body 11. Themounting projections 21, in this case, are spaced equally from one another so that aspace 16 is produced. Thebase body 11 haswebs 15 between themounting projections 21. Thewebs 15 each form an end face, which extends in the radial direction. All end faces of thewebs 15 rest on a common plane.Inclined faces 18 proceed from the end faces at angle. Theinclined faces 18, in this case, are facing the interior, which is surrounded by thedrill bit 10. The end faces and theinclined faces 18 pass over at their circumferential ends into deflectingfaces 26 of themounting projections 21. The deflecting faces 26 project above the end faces in the direction of the axis of the drill bit. The deflecting faces 26 each pass over into aroof portion 25 that passes over into asupport face 24. Thesupport face 24, in this case, is disposed at an angle to the horizontal. The two support faces 24 of onemounting projection 21, in this case, are aligned opposite one another and are part of atool receiver 20. Thetool receiver 20 has ashaft receiver 22, which has an oval cross-section, with an insertion channel 22.1 between the two support faces 24. The insertion channel 22.1 ends in anopening 12 and is machined into thebase body 11 in the shape of a window. Theopening 12, in this case, is developed so that it widens outwardly in a continuous manner proceeding from the inner wall 17.1 of thebase body 11. - The disposition and development of the insertion channel 22.1 and of the
opening 12 is shown inFIGS. 2 and 4 . As shown inFIG. 2 , cuttingteeth 30 can be inserted into thetool receiver 20. The development of the cuttingteeth 30 is shown in FIGS. 5 to 7. According to these Figures, the cuttingteeth 30 have atool head 31, on which a shaft is integrally formed. Thetool head 31 has hard metal inserts 35. At its free end theshaft 32 has a threadedportion 33. - The cutting
tooth 30 is inserted with itsshaft 32 into the insertion channel 22.1. In the installed state, the cuttingtooth 30 rests with corresponding mating faces on the support faces 24. - The threaded
portion 33 extends into the region of theopening 12, so that anut 34 can be screw-connected. The cuttingtooth 30 can be tensioned on the support faces 24 with thenut 34. As the cross-sectional geometry of theshaft 32 of the cuttingtooth 30 is adapted to the outline of the insertion channel 22.1, it is retained in a non-rotatable manner. As shown inFIG. 1 , the cuttingtooth 30 has two shaped faces 36, which pass over into the deflecting faces 26 of thesupport parts 25 in a seamless manner. - To calibrate the
drill bit 10,projections 13 are disposed on the outer face of thebase body 11 and haveelements 14 produced from hard metal for protection against wear. - In the region of the inner wall 17.1, the
base body 11 also has projections 17.2 which extend into the interior of thedrill bit 10 and optimize protection against wear at that location. - FIGS. 5 to 7 provide a more detailed representation of one embodiment of a cutting
tooth 30. The cuttingtooth 30 has atool head 31, on which ashaft 32 is integrally formed via a rounding transition. Theshaft 32 ends at the end remote from thetool head 31, in a threadedportion 33. Thetool head 31 has an upper top face 31.1, into which ahard metal insert 35 is admitted. To form a receiver for the hard metal insert, which is in the form of a straight pin, a web 37.1, 37.2 proceeds from the top face 31.1 at both the front and the rear. - As shown in
FIG. 5 , the top face 31.1, near or in the region of the inside of the cuttingtooth 30, passes over into a steeply descending concavely curved wall 38.2 which is divided longitudinally by tworibs 38 and the web 37.1. Theribs 38 and the web 37.1 form recesses 38.1, which serve as material pockets for accommodating residue material. As shown inFIG. 6 , at the rear the top face passes over into a wall 38.3, which extends parallel to the axis of rotation of thedrill bit 10. The wall 38.3 supports the web 37.2. The web 37.2 has hard material elements 39.3 that protrude above the web 37.2. The walls 38.2 and 38.3 pass over into one another at the sides of the cuttingtooth 30 by shapedfaces 36 that are triangular and are convexly curved. - The
shaft 32 is adjacent to abase part 39 of thetool head 31. Theshaft 32 has an oval cross-section, as shown inFIG. 7 . Theshaft 32 forms calibrating receiver 31.1 on the two longitudinal sides. Flat regions 32.2 are provided at the side of theshaft 32 and serve the calibration. Consequently, four true to measurement shaft regions can be forged between the calibrating receiver 31.1 and the flat regions 32.2. The shaft regions prevent theshaft 32 from jamming when inserted into theshaft receiver 22.
Claims (22)
1. A securing arrangement for retaining a cutting tooth (30) on a drill bit (10), wherein the cutting tooth (30) includes a tool head (31) and a shaft (32), the shaft (32) is accommodated in a shaft receiver (22) of one of the drill bit (10) and a holder connected to the drill bit (10), and the cutting tooth (30) rests on support faces (24) of the drill bit (10) with at least one contact face (39.1), the securing arrangement comprising: the support faces (24) and the contact faces (39.1) inclined in a circumferential direction, the drill bit (10) having a shoulder (27) offset relative to the at least one contact face (39.1) in a direction of an axis of the drill bit (10) and associated with and spaced from the cutting tooth (30).
2. The securing arrangement according to claim 1 , wherein the shaft receiver (22) is admitted at least partially into a shoulder face formed by the shoulder (27) and faces the cutting tooth (30).
3. The securing arrangement according to claim 2 , wherein the drill bit (10) has two of the contact faces (39.1) for each cutting tooth (30), and the two contact faces (39.1) are opposite one another.
4. The securing arrangement according to claim 3 , wherein the cutting tooth (30) has a threaded portion (33), mounted on the shaft (32), a nut (34) is screw-connectable to the threaded portion (33), and the cutting tooth (30) is pressed onto the support faces (24) via the contact faces (39.1) in a pre-tensioned manner by the nut (34).
5. The securing arrangement according to claim 4 , wherein at least over a portion of a longitudinal region extending in the direction of the axis of the drill bit, the shaft (32) of the cutting tooth (30) is circumferentially surrounded by the shaft receiver (22).
6. The securing arrangement according to claim 5 , wherein the shaft (32) of the cutting tooth (30) includes at least one calibrating receiver (32.1) setback relative to an inner wall of the shaft receiver (22).
7. The securing arrangement according to claim 6 , wherein that the shaft (32) of the cutting tooth (30) is tapered at least over a portion of a longitudinal extension in a direction towards a free end and the shaft receiver (22) is tapered at least in a regional manner, and an outside cross-section of the shaft (32) is smaller than an inside cross-section of the shaft receiver (22).
8. The securing arrangement according to claim 7 , wherein the tool head (31) of the cutting tooth (30) includes at least one radial (38.1) near a region directed radially inwards.
9. The securing arrangement according to claim 8 , wherein the tool head (31) is closed at circumferential end regions with triangular convexly curved shaped faces (36).
10. The securing arrangement according to claim 9 , wherein the tool head (31) has at least one element (39.3) of hard material near a second region directed radially outwards.
11. The securing arrangement according to claim 10 , the at least one hard material element (39.3) is admitted into a web (37.2), disposed near the cutting tooth (30) lying radially outwards and extending in the direction of the axis of the drill bit and protruding above a base part (39) of the cutting tooth (30), and the hard material elements (39.3) protrude in a regional manner radially above the web (39.2).
12. The securing arrangement according to claim 11 , wherein remote from the shaft (32) the tool head (31) of the cutting tooth (30) has a top face (31.1) into which a hard material insert is inserted.
13. The securing arrangement according to claim 1 , wherein the drill bit (10) has two of the contact faces (39.1) for each cutting tooth (30), and the two contact faces (39.1) are opposite one another.
14. The securing according to claim 1 , wherein the cutting tooth (30) has a threaded portion (33) mounted on the shaft (32), a nut (34) is screw-connectable to the threaded portion (33), and the cutting tooth (30) is pressed onto the support faces (24) via the contact faces (39.1) in a pre-tensioned manner by the nut (34).
15. The securing arrangement according to claim 1 , wherein at least over a portion of a longitudinal region extending in the direction of the axis of the drill bit, the shaft (32) of the cutting tooth (30) is circumferentially surrounded by the shaft receiver (22).
16. The securing arrangement according to claim 15 , wherein the shaft (32) of the cutting tooth (30) includes at least one calibrating receiver (32.1) set back relative to an inner wall of the shaft receiver (22).
17. The securing arrangement according to claim 1 , wherein the shaft (32) of the cutting tooth (30) is tapered at least over a portion of a longitudinal extension in a direction towards a free end and the shaft receiver (22) is tapered at least in a regional manner, and an outside cross-section of the shaft (32) is smaller than an inside cross-section of the shaft receiver (22).
18. The securing arrangement according to claim 1 , wherein the tool head (31) of the cutting tooth (30) includes at least one radial (38.1) near a region directed radially inwards.
19. The securing arrangement according to claim 1 , wherein the tool head (31) is closed at circumferential end regions with triangular convexly curved shaped faces (36).
20. The securing arrangement according to claim 1 , wherein the tool head (31) has at least one element (39.3) of hard material near a second region directed radially outwards.
21. The securing arrangement according to claim 20 , the at least one hard material element (39.3) is admitted into a web (37.2) disposed near the cutting tooth (30) lying radially outwards and extending in the direction of the axis of the drill bit and protruding above a base part (39) of the cutting tooth (30), and the hard material elements (39.3) protrude in a regional manner radially above the web (39.2).
22. The securing arrangement according to claim 1 , wherein remote from the shaft (32) the tool head (31) of the cutting tooth (30) has a top face (31.1) into which a hard material insert is inserted.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10205643A DE10205643C1 (en) | 2002-02-12 | 2002-02-12 | Drill bit with detachable cutting teeth |
DE10205643.9 | 2002-02-12 | ||
PCT/EP2002/014789 WO2003068438A1 (en) | 2002-02-12 | 2002-12-28 | Fixing arrangement |
Publications (1)
Publication Number | Publication Date |
---|---|
US20050139396A1 true US20050139396A1 (en) | 2005-06-30 |
Family
ID=27674601
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/504,348 Abandoned US20050139396A1 (en) | 2002-02-12 | 2002-12-28 | Fixing arrangement |
Country Status (6)
Country | Link |
---|---|
US (1) | US20050139396A1 (en) |
CN (1) | CN1617781A (en) |
AU (1) | AU2002361225A1 (en) |
DE (1) | DE10205643C1 (en) |
GB (1) | GB2399526B (en) |
WO (1) | WO2003068438A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2792864C1 (en) * | 2022-08-15 | 2023-03-28 | Акционерное общество Научно-производственная фирма "Геофизические Исследования, Технологии, Аппаратура, Сервис" (АО НПФ "ГИТАС") | Core bit |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU2003900227A0 (en) * | 2003-01-20 | 2003-02-06 | Transco Manufacturing Australia Pty Ltd | Attachment means for drilling equipment |
CN105156036B (en) | 2015-08-27 | 2018-01-05 | 中国石油天然气集团公司 | Convex ridge type on-plane surface cutting tooth and diamond bit |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
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SE455770B (en) * | 1987-07-02 | 1988-08-08 | Sandvik Ab | DRILL WITH EXCHANGABLE SHOES |
DE3933867C2 (en) * | 1989-10-11 | 1995-08-17 | Bauer Spezialtiefbau | Drill bit with teeth arranged around the circumference for drill pipes |
DE3943076A1 (en) * | 1989-12-27 | 1991-07-04 | Hilti Ag | HAND DEVICE WITH MILLING OR GRINDING WHEEL |
DE4002907A1 (en) | 1990-02-01 | 1991-08-08 | Leffer Stahl & App | Cylindrical cutting head forms extension of borehole drill pipe |
DE4226363C2 (en) * | 1992-08-10 | 1995-07-06 | Bauer Spezialtiefbau | Drill bit with widely distributed, detachably arranged tooth bodies |
AU5175898A (en) * | 1996-11-08 | 1998-05-29 | Everett D. Hougen | End face mounted insert |
SE516052C2 (en) * | 2000-03-17 | 2001-11-12 | Sandvik Ab | drilling Tools |
-
2002
- 2002-02-12 DE DE10205643A patent/DE10205643C1/en not_active Expired - Fee Related
- 2002-12-28 AU AU2002361225A patent/AU2002361225A1/en not_active Abandoned
- 2002-12-28 US US10/504,348 patent/US20050139396A1/en not_active Abandoned
- 2002-12-28 CN CNA028276337A patent/CN1617781A/en active Pending
- 2002-12-28 GB GB0416779A patent/GB2399526B/en not_active Expired - Fee Related
- 2002-12-28 WO PCT/EP2002/014789 patent/WO2003068438A1/en not_active Application Discontinuation
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2792864C1 (en) * | 2022-08-15 | 2023-03-28 | Акционерное общество Научно-производственная фирма "Геофизические Исследования, Технологии, Аппаратура, Сервис" (АО НПФ "ГИТАС") | Core bit |
Also Published As
Publication number | Publication date |
---|---|
GB2399526B (en) | 2005-07-27 |
WO2003068438A1 (en) | 2003-08-21 |
GB0416779D0 (en) | 2004-09-01 |
GB2399526A (en) | 2004-09-22 |
CN1617781A (en) | 2005-05-18 |
DE10205643C1 (en) | 2003-10-16 |
AU2002361225A1 (en) | 2003-09-04 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: BETEK BERGBAU- UND HARTMETALLTECHNIK KARL-HEINZ SI Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:KAMMERER, KARL;SCHILLINGER, WILLI;REEL/FRAME:016352/0035 Effective date: 20040729 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO PAY ISSUE FEE |