WO2016166908A1 - 拡径用ドリルビット - Google Patents
拡径用ドリルビット Download PDFInfo
- Publication number
- WO2016166908A1 WO2016166908A1 PCT/JP2015/078687 JP2015078687W WO2016166908A1 WO 2016166908 A1 WO2016166908 A1 WO 2016166908A1 JP 2015078687 W JP2015078687 W JP 2015078687W WO 2016166908 A1 WO2016166908 A1 WO 2016166908A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- cutting blade
- diameter
- drill bit
- individual cutting
- individual
- Prior art date
Links
- 239000002826 coolant Substances 0.000 claims description 45
- 230000002093 peripheral effect Effects 0.000 claims description 18
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 238000000605 extraction Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 8
- 239000000110 cooling liquid Substances 0.000 description 7
- 125000006850 spacer group Chemical group 0.000 description 3
- 229910000851 Alloy steel Inorganic materials 0.000 description 2
- 229910003460 diamond Inorganic materials 0.000 description 2
- 239000010432 diamond Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000000112 cooling gas Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28D—WORKING STONE OR STONE-LIKE MATERIALS
- B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
- B28D1/14—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by boring or drilling
- B28D1/146—Tools therefor
-
- 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
- B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
- B24B5/02—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centres or chucks for holding work
- B24B5/06—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centres or chucks for holding work for grinding cylindrical surfaces internally
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B51/00—Tools for drilling machines
- B23B51/0018—Drills for enlarging a hole
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B51/00—Tools for drilling machines
- B23B51/0018—Drills for enlarging a hole
- B23B51/0045—Drills for enlarging a hole by expanding or tilting the toolhead
-
- 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
- B24B33/00—Honing machines or devices; Accessories therefor
- B24B33/02—Honing machines or devices; Accessories therefor designed for working internal surfaces of revolution, e.g. of cylindrical or conical shapes
-
- 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
- B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
- B24B5/36—Single-purpose machines or devices
- B24B5/40—Single-purpose machines or devices for grinding tubes internally
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28D—WORKING STONE OR STONE-LIKE MATERIALS
- B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
- B28D1/14—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by boring or drilling
-
- 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
- E21B10/26—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers
- E21B10/32—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers with expansible cutting tools
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2226/00—Materials of tools or workpieces not comprising a metal
- B23B2226/75—Stone, rock or concrete
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2270/00—Details of turning, boring or drilling machines, processes or tools not otherwise provided for
- B23B2270/04—Use of centrifugal force
Definitions
- the present invention mainly relates to a drill bit for expanding a diameter for expanding a part of a pilot hole drilled in a concrete body or the like.
- an undercut drill device which is inserted into a straight-shaped prepared hole drilled in a concrete body or the like and expands the innermost part of the prepared hole.
- This undercut drill device includes a hollow cylindrical cylindrical body that is inserted into a pilot hole, a contact member that sits on the opening edge of the pilot hole and rotatably supports the cylindrical body via a bearing, A shaft that slidably engages with the cylindrical body and rotates integrally with the cylindrical body, a truncated cone-shaped cone portion provided on the distal end side of the cylindrical body and having four guide grooves on the outer peripheral surface, and a distal end portion of the shaft Four arms that are attached and engage with each guide groove, and two cutting blades and two guide portions that are alternately provided on the outer surface of the front end of the four arms are provided.
- the cutting blade and the guide part are located inside the cylindrical body with the shaft pulled up.
- the cylindrical body and the shaft inserted into the prepared hole are integrally rotated and the shaft is moved downward, the four arms are opened outward while being moved downward by the guide groove of the cone portion.
- a cutting blade grinds the internal peripheral surface of a pilot hole, and an enlarged diameter part is formed in the bottom part (deepest part) of a pilot hole.
- Such a conventional undercut drill device has a structure in which the arm having the cutting edge is guided by the outer peripheral surface of the cone portion, so the cone portion must be supported by the cylindrical body, and the structure is extremely complicated. There was a problem. In addition, it is configured to grind the inner peripheral surface of the pilot hole by opening the arm provided with the cutting edge outward by the guide groove while moving downward, so the shape of the enlarged diameter portion formed is naturally constrained Was to occur.
- An object of the present invention is to provide a drill bit for expanding the diameter, which has a simple structure and can give a degree of freedom to the shape of the expanded diameter portion to be formed.
- the diameter expansion drill bit of the present invention is used by being inserted into a pilot hole drilled in a housing, and is a diameter expansion drill bit for expanding a part of the pilot hole by grinding, and a part of the pilot hole
- a cutting blade portion having a plurality of individual cutting blade portions for grinding, a cutting blade holding portion that holds the plurality of individual cutting blade portions so as to be slidable in the radial direction, and a shank that supports the cutting blade holding portion
- the plurality of individual cutting blade portions are arranged in a plurality in the circumferential direction and in a plurality of steps in the axial direction, and the plurality of individual cutting blade portions in each step are cut by a centrifugal force accompanying rotation. It slides so that it may each expand radially outward with respect to a blade holding part, It is characterized by the above-mentioned.
- each of the plurality of individual cutting blade portions held by the cutting blade holding portion receives the centrifugal force and radially outwards.
- Move the slide That is, the plurality of individual cutting blade portions that rotate together with the cutting blade holding portion slide and move so as to expand radially outward by centrifugal force, and the prepared holes are ground to expand the diameter.
- each individual cutting blade portion is configured to move by centrifugal force, the structure can be simplified.
- the plurality of individual cutting edge portions of each step are expanded by centrifugal force, a diameter-enlarged portion having an arbitrary shape can be formed in the axial direction by setting the moving stroke differently for each step. . That is, the shape of the enlarged diameter portion to be formed can have a degree of freedom.
- the plurality of individual cutting blade portions of each step have different radial movement strokes for each step.
- the moving stroke for each step becomes longer toward the tip.
- a diameter-enlarged portion having a substantially truncated cone shape that expands toward the tip can be formed in the prepared hole.
- the plurality of individual cutting blade portions in each step have the same radial movement stroke for each step.
- a substantially cylindrical enlarged diameter portion can be formed in the prepared hole.
- the cutting blade holding part is formed in a shape that expands toward the tip.
- a diameter-enlarged portion having a substantially truncated cone shape that expands toward the tip can be formed in the prepared hole.
- each individual cutting edge part has a guide part which guides extraction from the enlarged diameter part formed in the pilot hole on the base end side outer peripheral surface.
- the cutting edge holding portion has a spire portion that is coaxially located at the tip portion and protrudes, and the spire portion is preferably made of a super steel material.
- the diameter-enlarged portion can be formed at a predetermined depth position with the spire portion pressed against the hole bottom of the pilot hole and rotated, with the hole bottom of the pilot hole used as a reference.
- the spire portion makes point contact with the center of the hole bottom, friction with the hole bottom can be minimized as much as possible during rotation, and rotational blurring of the cutting edge portion can be suppressed as much as possible.
- the spire portion is made of a super steel material, wear of the spire portion can be suppressed as much as possible. Thereby, an enlarged diameter part can always be formed in the predetermined position from the hole bottom of a pilot hole.
- the cutting blade holding portion has a plurality of cutting blade openings for slidably holding a plurality of individual cutting blade portions at each stage, and each individual cutting blade portion includes a grinding portion having an arcuate cross section.
- the individual cutting blade portion that moves radially outward by the centrifugal force slides with the rib portion guided by the cutting blade opening of the cutting blade holding portion.
- the cutting blade main body including the grinding part moves parallel to the radial outside.
- a pilot hole (part) can be ground efficiently.
- the retaining portion can easily regulate the moving end position of the cutting blade main body that moves radially outward, that is, the moving stroke of the individual cutting blade portion.
- the plurality of individual cutting blade portions in each stage are constituted by two individual cutting blade portions disposed at 180 ° point symmetrical positions.
- the cutting edge portion can be simply and compactly configured without impairing the cutting performance.
- the shank portion communicates with the shank main body having a flow path in the shank for supplying a coolant to the cutting edge portion via the cutting edge holding portion, and from the tip end portion of the shank main body. It is preferable to have a coolant pipe extending to a position corresponding to a plurality of individual cutting blade portions at the most advanced stage in the cutting blade holding portion.
- the coolant when the coolant is discharged from the coolant pipe, the coolant is supplied from the front end side of the cutting blade portion (a plurality of individual cutting blade portions at the most advanced stage) via the cutting blade holding portion. Can be cooled. Since the coolant supplied from the front end side of the cutting edge portion flows toward the opening of the pilot hole while cooling the individual cutting edge portions of each stage, the cutting edge portion can be efficiently cooled. Further, when the coolant is a liquid, the coolant that has received centrifugal force presses each individual cutting edge portion so as to scatter in a radial manner, and promotes its expansion.
- FIG. 4 is a structural diagram (a) of a bit portion in the drill bit for diameter expansion according to the first embodiment, a structural diagram (b) in an exploded state thereof, and a structural diagram (c) in an exploded state rotated by 90 °. It is a disassembled perspective view of the cutting blade part in a bit part. It is explanatory drawing showing the expansion state of the individual cutting blade part of each step
- This diameter-expanding drill bit mainly expands the diameter of a pilot hole formed in a concrete or other structure to drive the post-construction anchor, and increases the pull-out strength of the post-installation anchor. To get. That is, in order to make the post-installed anchor driven into the prepared hole exhibit a theoretical wedge effect, this diameter-expanding drill bit forms an expanded portion in a part of the prepared hole.
- FIG. 1 is an external view of a diameter expansion device that forms a diameter expansion portion in a pilot hole.
- the diameter expansion device 1 has a hand-held electric drill 2, a coolant attachment 3 attached to the electric drill 2, and a diameter expansion drill bit 10 attached to the coolant attachment 3. ing. That is, the diameter-expanding drill bit 10 is used by being detachably mounted on the rotating shaft 3a of the coolant attachment 3 connected to the electric drill 2 constituting the power source.
- a coolant flow path is formed on the rotating shaft 3a, and a coolant supply device (not shown) is connected to the coolant attachment 3, and the coolant is supplied from the coolant supply device to the coolant attachment. 3 is supplied to the distal end portion of the diameter-expanding drill bit 10.
- the coolant attachment 3 incorporates a valve for opening and closing the coolant flow path (not shown), and the valve is configured by abutting the diameter-expanding drill bit 10 against the hole bottom Ha of the pilot hole H. “Open” and “closed” when separated from the hole bottom Ha.
- the pilot hole H is drilled by a vibration drill, a hammer drill, a core bit, or the like.
- the drill bit for diameter expansion 10 is detachably mounted on the rotating shaft 3a (coolant attachment 3) of the diameter expansion device 1 on the base end side and the bit portion 11 that forms the diameter expansion portion Hb in the pilot hole H, And a shank portion 12 that coaxially supports the bit portion 11 on the side.
- the bit part 11 is unitized and is detachably attached to the tip part of the shank part 12 by screw joining.
- the shank part 12 is integrally formed by the shank main body 15 which supports the bit part 11, and the large diameter shaft part 16 with which the rotating shaft 3a is mounted
- the shaft portion 16 has a fastening portion 16a formed with a female screw at its fore end, and the fastening portion 16a is screwed to the rotating shaft 3a of the coolant attachment 3 formed with a male screw.
- tip external thread part 15a in which the bit part 11 screws together is formed in the front-end
- an in-shank flow path 17 for coolant is formed in the axial center of the shank body 15 and the shaft portion 16.
- the cooling liquid supplied from the cooling liquid attachment 3 is supplied to the bit unit 11 through the in-shank channel 17.
- the above-described diameter expanding device 1 is a wet type using a cooling liquid, and a dry type using no cooling liquid is also prepared.
- the shank portion 12 does not have the in-shank channel 17, and the diameter expanding drill bit 10 is directly connected to the electric drill 2.
- compressed air or cooling gas is introduced instead of the cooling liquid.
- the unitized bit portion 11 is used as a common part in these wet and dry diameter expanding drill bits 10.
- the bit part 11 includes a cutting edge part 21 having a plurality of (six in the embodiment) individual cutting edge parts 22 for grinding the pilot hole H, and a plurality of individual cutting edge parts. And a cutting blade holding portion 23 for holding the blades 22 so as to be movable in the radial direction. Further, the plurality (six) of individual cutting blade portions 22 are arranged in a plurality (two) in the circumferential direction and in a plurality of stages (three) in the axial direction.
- the diameter-expanding drill bit 10 is rotated in a state where the bit portion 11 is inserted into the pilot hole H, and the individual cutting edge portions are divided into two and three stages in total by centrifugal force. 22 expands radially outward and grinds the enlarged diameter portion Hb.
- the cutting blade portion 21 includes a first pair of first individual cutting blade portions 22A (see FIG. 4A) located on the shank portion 12 side and a second pair of second individual cutting blades. It has a portion 22B (see (b) in FIG. 4) and a pair of third individual cutting blade portions 22C (see (c) in FIG. 4) located on the tip side.
- the cutting blade holding portion 23 has a holding portion main body 25 that holds the cutting blade portion 21 and a holding portion receiver 26 on the shank portion 12 side to which the holding portion main body 25 is screwed.
- the holding portion receiver 26 includes a first female screw portion 31 having a small diameter formed on the proximal end side, and a second female screw portion 32 having a large diameter formed on the distal end side.
- the first female screw portion 31 is screwed with the distal end portion (tip male screw portion 15a) of the shank portion 12 (shank main body 15), and the second female screw portion 32 is screwed with the proximal end portion of the holding portion main body 25.
- the base end side half of the holding portion receiver 26 is formed in a tapered shape so as to be largely chamfered.
- the holding portion receiver 26 may be formed integrally with the shank portion 12.
- the holding part main body 25 includes a flange-shaped tip flange part 41, a cylindrical cylindrical holding part 42 that is connected to the tip flange part 41 and holds the cutting edge part 21, a cylindrical screw part 43 that is connected to the cylindrical holding part 42, have.
- the holding part body 25 includes a spire part 45 provided at the tip of the center part of the tip flange part 41, and a plurality of (two) slit parts 46 (cutting blades) formed in the cylindrical holding part 42 and the cylindrical screw part 43. Opening).
- the six individual cutting blade portions 22 constituting the cutting blade portion 21 are held along the outer peripheral surface of the holding portion main body 25.
- the front end flange portion 41 has a front end half portion formed in a tapered shape, and a spire portion 45 is attached to an axial center portion of this portion.
- the spire portion 45 is made of, for example, a super steel alloy (super steel material), and is integrally formed of a tip conical portion 45a and a columnar portion 45b continuous therewith. Further, the cone angle of the tapered portion of the tip flange portion 41 and the cone angle of the tip cone portion 45a are formed at the same angle, and the tip cone portion 45a is positioned on the extension of the tapered portion of the tip flange portion 41. It has become.
- the tip flange portion 41 is formed to have the largest diameter in the bit portion 11, and the diameter is slightly smaller than the pilot hole H (about 0.5 mm).
- the diameter-expanding drill bit 10 rotates the spire portion 45 in a state of abutting against the hole bottom Ha of the pilot hole H, and forms a diameter-expanded portion Hb in the deep part of the pilot hole H. That is, when forming the enlarged diameter portion Hb, the enlarged diameter drill bit 10 is rotated in a state where the tip cone portion 45a is abutted against the center of the hole bottom Ha.
- the tip conical portion 45a (spire portion 45) makes point contact with the center of the hole bottom Ha, and the friction with the hole bottom Ha can be minimized when rotating.
- the spire portion 45 is made of a super steel alloy, wear of the spire portion 45 can be suppressed as much as possible.
- rotation blur of the bit part 11 (cutting edge part 21) can be suppressed as much as possible by the spire part 45 and the large-diameter tip flange part 41. Therefore, the enlarged diameter portion Hb can always be formed at a predetermined position from the hole bottom Ha of the prepared hole H.
- the spire part 45 is attached to the front-end
- the cylindrical screw portion 43 is formed with a male screw on the outer peripheral surface and has the same diameter as the cylindrical holding portion 42.
- the two slit portions 46 are formed so as to cut from the proximal end of the cylindrical screw portion 43 toward the cylindrical holding portion 42.
- the two slit portions 46 are formed at 180 ° point symmetrical positions in the circumferential direction of the cylindrical holding portion 42 and the cylindrical screw portion 43. Therefore, the individual cutting blade portions 22 of each step held by the slit portion 46 are also arranged at 180 ° point symmetrical positions in the circumferential direction. Further, the individual cutting blade portions 22 of each step are mounted on the cylindrical holding portion 42 so as to slide from the proximal end of the cylindrical screw portion 43, that is, from the small edge.
- the cylindrical screw portion 43 is screwed into the second female screw portion 32 of the holding portion receiver 26 in a state where the three-stage and each pair of individual cutting blade portions 22 are attached to the cylindrical holding portion 42.
- the three individual cutting edge portions 22 held by the cylindrical holding portion 42 are sandwiched between the tip flange portion 41 and the holding portion receiver 26 with a minute gap therebetween in the axial direction. It becomes a state.
- a spacer 34 is incorporated in the inner peripheral portion of the cylindrical screw portion 43 on the holding portion receiver 26 side.
- the spacer 34 is formed in a cylindrical shape, and comes into contact with the proximal end of the first individual cutting blade portion 22 ⁇ / b> A at the cylindrical screw portion 43. That is, the spacer 34 is in contact with the rib portion 52 and the retaining portion 53 (described later) of the first individual cutting blade portion 22 ⁇ / b> A, and the cutting blade body 51 (described later) is not in contact with the cylindrical screw portion 43.
- a minute clearance is configured. Thereby, the movement to the radial direction of the individual cutting blade part 22 by a centrifugal force is performed smoothly.
- the individual cutting blade portion 22 includes a cutting blade body 51 provided along the outer peripheral surface of the cutting blade holding portion 23, and a rib portion protruding from the inside of the cutting blade body 51. 52 and a widened retaining portion 53 (stopper) provided at the tip of the rib portion 52.
- the cutting blade body 51 has a substantially 1 ⁇ 4 arc cross-sectional shape, and a grinding portion 55 is formed on the outer periphery thereof.
- the rib portion 52 is engaged with the slit portion 46 so as to be slidable in the radial direction. That is, the cutting blade main body 51 is located outside the holding portion main body 25 (cylindrical holding portion 42), and the retaining portion 53 is located inside. In this state, the rib portion 52 is slidable with respect to the slit portion 46. Is engaged. And the length of the rib part 52 becomes a moving stroke of the individual cutting blade part 22.
- the pair of individual cutting blade portions 22 held by the holding portion main body 25 is configured to be able to expand by a moving stroke radially outward by a centrifugal force generated by rotation. That is, in the initial state of expansion, the inner surface of the cutting blade body 51 is in contact with the outer peripheral surface of the cylindrical holding portion 42, and in the expanded state, the outer surface of the retaining portion 53 is the inner periphery of the cylindrical holding portion 42. Contact the surface (see FIG. 4). However, it is preferable that the actual grinding of the enlarged diameter portion Hb is managed by time (about 10 seconds).
- the cutting blade portion 21 includes the first pair of first individual cutting blade portions 22A, the second pair of second individual cutting blade portions 22B, and the third step. And a pair of third individual cutting blade portions 22C.
- the first individual cutting blade portion 22A, the second individual cutting blade portion 22B, and the third individual cutting blade portion 22C are formed such that the rib portion 52 becomes longer in this order. That is, the first individual cutting blade portion 22A, the second individual cutting blade portion 22B, and the third individual cutting blade portion 22C are formed in this order so that the moving stroke in the radial direction becomes longer (see FIG. 4).
- a diameter-expanded portion Hb having a shape that expands stepwise (substantially truncated cone shape) toward the hole bottom Ha is formed (see FIG. 5).
- first individual cutting blade portion 22A, the second individual cutting blade portion 22B, and the third individual cutting blade portion 22C are formed with a tapered guide portion 56 on the outer peripheral surface of the base end side.
- the guide portion 56 of the first individual cutting blade portion 22A is formed large, and the guide portions 56 of the second individual cutting blade portion 22B and the third individual cutting blade portion 22C are formed small and in the same shape.
- the enlarged diameter drill bit 10 is pulled out from the pilot hole H.
- the individual cutting edge portion 22 is returned to the original position by the guide portion 56, and the enlarged diameter drill bit 10 is It can be pulled out smoothly.
- the cutting blade body 51 is composed of a diamond cutting blade having an arc cross section. That is, the cutting blade body 51 includes the guide portion 56 described above, and has a diamond grinding portion 55 on the outer peripheral portion thereof. Thereby, the inner peripheral surface of the pilot hole H is ground toward the outer side, and the enlarged diameter part Hb of a predetermined dimension is formed. Note that a weight or the like may be provided on the inner surface of the cutting blade body 51 so that a strong centrifugal force acts on the individual cutting blade portion 22.
- the cutting blade main body 51 Since the cutting blade main body 51 has an arc shape, the actual grinding portion shifts from the entire arc-shaped peripheral surface to the intermediate portion as the spread proceeds (see FIG. 4). That is, as the grinding progresses, the frictional resistance of the cutting blade body 51 decreases, so that the grinding can proceed smoothly. But you may comprise the circular arc-shaped outer peripheral part of the cutting-blade main body 51 by the circular arc with a larger curvature than the circular arc with respect to the rotation center of the cutting-blade holding
- the diameter expansion operation of the pilot hole H by the diameter expansion drill bit 10 will be described.
- a pilot hole H is formed in advance in a target concrete frame A or the like.
- the concrete frame A in this case includes a foundation, a beam, and the like in addition to a concrete outer wall, an inner wall, and a slab.
- the diameter expansion drill bit 10 attached to the diameter expansion device 1 is inserted into the pilot hole H, and the spire portion 45 of the bit part 11 is abutted against the hole bottom Ha of the pilot hole H.
- the electric drill 2 is driven to rotate the diameter expanding drill bit 10.
- the diameter-expanding drill bit 10 rotates, centrifugal force acts on the 6 individual cutting edge portions 22, and the individual cutting edge portions 22 expand outward (see FIG. 5).
- the grinding part 55 of the rotating cutting blade main body 51 grinds the inner surface of the pilot hole H, and forms the enlarged diameter part Hb in the inner part of the pilot hole H.
- the first individual cutting blade portion 22A, the second individual cutting blade portion 22B, and the third individual cutting blade portion 22C are formed in this order so that the moving stroke in the radial direction becomes longer, it is expanded stepwise.
- An enlarged diameter portion Hb having an opening shape (substantially truncated cone shape) is formed.
- the cooling liquid is supplied. The cooling liquid cools the cutting edge part 21 and also cleans the pilot hole H and leaks out from the slit part 46 to individually cut. The expansion of the blade 22 is promoted.
- the coolant that has received the centrifugal force presses the individual cutting blade portion 22 so as to radiate radially, and the coolant that adheres to the slit portion 46 functions as a lubricant, and the individual cutting blade portion 22 expands. Promote opening.
- the radial movement stroke in the order of the first individual cutting blade portion 22A, the second individual cutting blade portion 22B, and the third individual cutting blade portion 22C. Is formed so as to be long, the diameter-enlarged portion Hb having a substantially truncated cone shape can be easily formed.
- the individual cutting edge part 22 is the structure expanded by centrifugal force, an apparatus structure can be simplified.
- cylindrical holding portion 42 and the holding portion receiver 26 may be integrally formed, and the tip flange portion 41 may be screwed into the cylindrical holding portion 42.
- the number of individual cutting blade portions 22 in each step may be three or more, and the number of steps of the individual cutting blade portions 22 may be four or more.
- the two individual cutting edge portions 22 of each step are formed in a tapered shape that follows the tapered shape of the formed expanded diameter portion Hb.
- the cutting blade body 51 of the first individual cutting blade portion 22A has a shape that follows the tapered shape of the upper stage portion of the enlarged diameter portion Hb
- the cutting blade body 51 of the second individual cutting blade portion 22B has the enlarged diameter portion Hb.
- the cutting blade body 51 of the third individual cutting blade portion 22C is formed in a shape following the tapered shape of the lower portion of the enlarged diameter portion Hb.
- the moving stroke of radial direction may become long in order of 22 A of 1st individual cutting blade parts, 22B of 2nd individual cutting blade parts, and 22 C of 3rd individual cutting blade parts. Yes. That is, the first individual cutting blade portion 22A, the second individual cutting blade portion 22B, and the third individual cutting blade portion 22C are formed such that the rib portion 52 becomes longer in this order.
- the entire grinding by each of the first individual cutting blade portion 22A, the second individual cutting blade portion 22B, and the third individual cutting blade portion 22C can be formed.
- the guide portion 56 can be omitted.
- the diameter-expansion drill bit 10 which concerns on 3rd Embodiment, a different part from 1st Embodiment is mainly demonstrated.
- this diameter-expanding drill bit 10 in the bit portion 11, the two individual cutting blade portions 22 of each step are configured to have the same radial movement stroke for each step. That is, in the first individual cutting blade portion 22A, the second individual cutting blade portion 22B, and the third individual cutting blade portion 22C, the rib portions 52 are formed to have the same length.
- the entire grinding is performed by each of the first individual cutting edge 22A, the second individual cutting edge 22B, and the third individual cutting edge 22C.
- a substantially cylindrical enlarged diameter portion Hb can be formed.
- the cutting edge holding part 23 (cylindrical holding part 42) is formed in a shape that expands stepwise toward the tip.
- the rib portions 52 are formed to have the same length in the first individual cutting blade portion 22A, the second individual cutting blade portion 22B, and the third individual cutting blade portion 22C.
- the entire grinding is performed by grinding each of the first individual cutting blade portion 22A, the second individual cutting blade portion 22B, and the third individual cutting blade portion 22C.
- the substantially frustoconical diameter-enlarged portion Hb can be formed.
- the cutting edge holding part 23 (cylindrical holding part 42) is formed in a tapered shape that expands toward the tip.
- Each individual cutting edge portion 22 has a grinding portion 55 having a taper angle following the taper angle of the cutting edge holding portion 23. That is, as in the second embodiment, the two individual cutting edge portions 22 of each step are formed in a tapered shape following the tapered shape of the formed enlarged diameter portion Hb.
- the rib portion 52 is formed to have the same length in the first individual cutting blade portion 22A, the second individual cutting blade portion 22B, and the third individual cutting blade portion 22C.
- the first individual cutting blade portion 22A, the second individual cutting blade portion 22B, and the third individual cutting blade portion 22C are ground by the grinding.
- the diameter-enlarged portion Hb having a truncated cone shape as a whole can be formed.
- a coolant pipe 18 (coolant pipe) is provided at the tip of the shank portion 12 and is connected to the in-shank flow path 17. That is, the shank portion 12 of the sixth embodiment communicates with the shank main body 15 having the in-shank flow path 17 and the in-shank flow path 17, and from the distal end portion of the shank main body 15 to the third individual blade at the cutting blade holding portion 23. And a coolant pipe 18 extending to a position corresponding to the cutting edge portion 22C.
- An in-shank channel 17 is formed at the shaft center of the shank body 15, and the tip of the in-shank channel 17 is somewhat narrowed to a small diameter.
- the coolant pipe 18 is attached to the front-end
- the coolant pipe 18 is formed of stainless steel or the like, and the base end portion thereof is attached to the shank body 15 (the shank internal channel 17) by press fitting or the like.
- a coolant pipe 18 having an inner diameter that is the same as the diameter of the tip of the flow passage 17 in the shank is prepared, and the tip of the flow passage 17 in the shank is expanded in accordance with the outer diameter of the coolant pipe 18. It is more preferable to press-fit the coolant pipe 18 into the part.
- the rib portion 52 is formed shorter than the radius of the coolant pipe 18.
- the coolant is discharged from the tip of the coolant pipe 18 into the cutting blade holder 23.
- the coolant discharged from the coolant pipe 18 is directed to the opening through the slit 46 in the order of the third individual cutting edge 22C, the second individual cutting edge 22B, and the first individual cutting edge 22A.
- Flow in the pilot hole H thereby, since the coolant flows smoothly in the pilot hole H, each individual cutting edge portion 22 can be efficiently cooled.
- shank body 15 and the coolant pipe 18 may be integrally formed. Further, a small hole may be appropriately formed in the peripheral wall surface of the coolant pipe 18. For example, a small hole is formed corresponding to the second individual cutting blade portion 22B and the first individual cutting blade portion 22A, and the expansion of each individual cutting blade portion 22 is promoted by the coolant that receives centrifugal force. Also good.
- 1 drilling device 2 electric drill, 3 coolant attachment, 10 diameter drill bit, 11 bit section, 12 shank section, 15 shank body, 17 shank passage, 18 coolant pipe, 21 cutting edge section, 22 individual Cutting edge part, 22A 1st individual cutting edge part, 22B 2nd individual cutting edge part, 22C 3rd individual cutting edge part, 23 cutting edge holding part, 25 holding part body, 26 holding part receiving, 41 tip flange part, 42 Cylindrical holding part, 43 cylindrical screw part, 45 spire part, 46 slit part, 51 cutting blade body, 52 rib part, 53 retaining part, 55 grinding part, 56 guide part, A concrete frame, H pilot hole, Ha hole bottom , Hb expanded part
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- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
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- Processing Of Stones Or Stones Resemblance Materials (AREA)
- Grinding Of Cylindrical And Plane Surfaces (AREA)
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Abstract
Description
このアンダーカットドリル装置は、下穴に挿入される中空円筒状の筒体と、下穴の開口縁部に着座し、ベアリングを介して筒体を回転自在に支持する当て部材と、同軸上において筒体にスライド自在に係合し、筒体と一体回転するシャフトと、筒体の先端側に設けられ、外周面に4つのガイド溝を有する円錐台形状のコーン部と、シャフトの先端部に取り付けられ、各ガイド溝に係合する4つのアームと、4つアームの先端部外面に交互に設けた2つの切刃および2つのガイド部と、を備えている。
切刃およびガイド部は、シャフトを引き上げた状態で筒体の内側に位置している。下穴に挿入した筒体およびシャフトを一体回転させ、シャフトを下動させてゆくと、コーン部のガイド溝により4つのアームが下動しながら外側に開いてゆく。これにより、切刃が下穴の内周面を研削し、下穴の底部(最奥部)に拡径部が形成される。
また、切刃を設けたアームを、下動させながらガイド溝により外側に開くようにして、下穴の内周面を研削する構成であるため、形成される拡径部の形状に、自ずと制約が生ずるものとなっていた。
この構成によれば、個別切刃部が、基端側外周面にガイド部を有しているため、切刃部を引き抜くときに、このガイド部を介して個別切刃部を元の位置に移動させることができる。したがって、形成した拡径部分の形状に拘わらず、拡径用ドリルビットを円滑に引き抜くことができる。
同図に示すように、この拡径用ドリルビット10では、ビット部11において、各段の2つの個別切刃部22が、形成される拡径部Hbのテーパー形状に倣ったテーパー形状に形成されている。すなわち、第1個別切刃部22Aの切刃本体51は、拡径部Hbの上段部分のテーパー形状に倣った形状に、第2個別切刃部22Bの切刃本体51は、拡径部Hbの中断部分のテーパー形状に倣った形状に、第3個別切刃部22Cの切刃本体51は、拡径部Hbの下段部分のテーパー形状に倣った形状に、それぞれ形成されている。
同図に示すように、この拡径用ドリルビット10では、ビット部11において、各段の2つの個別切刃部22は、段毎の径方向の移動ストロークが同一に構成されている。すなわち、第1個別切刃部22A、第2個別切刃部22Bおよび第3個別切刃部22Cにおいて、リブ部52が、同一の長さに形成されている。
同図に示すように、この拡径用ドリルビット10では、ビット部11において、切刃保持部23(円筒保持部42)は、先端に向かって段階的な拡開する形状に形成されている。一方、第3実施形態と同様に、第1個別切刃部22A、第2個別切刃部22Bおよび第3個別切刃部22Cにおいて、リブ部52が、同一の長さに形成されている。
同図に示すように、この拡径用ドリルビット10では、ビット部11において、切刃保持部23(円筒保持部42)は、先端に向かって拡開するテーパー形状に形成されている。また、各個別切刃部22は、切刃保持部23のテーパー角に倣うテーパー角の研削部55を有している。すなわち、第2実施形態のように、各段の2つの個別切刃部22が、形成される拡径部Hbのテーパー形状に倣ったテーパー形状に形成されている。そして、この場合も、第1個別切刃部22A、第2個別切刃部22Bおよび第3個別切刃部22Cにおいて、リブ部52が、同一の長さに形成されている。
同図に示すように、この拡径用ドリルビット10では、シャンク部12の先端にシャンク内流路17に連なる冷却液パイプ18(冷却剤パイプ)が設けられている。すなわち、第6実施形態のシャンク部12は、シャンク内流路17を有するシャンク本体15と、シャンク内流路17に連通すると共に、シャンク本体15の先端部から切刃保持部23における第3個別切刃部22Cに対応する位置まで延びる冷却液パイプ18と、を有している。
Claims (10)
- 躯体に穿孔した下穴に挿入して用いられ、前記下穴の一部を研削により拡径するための拡径用ドリルビットであって、
前記下穴の一部を研削するための複数の個別切刃部を有する切刃部と、
前記複数の個別切刃部を、それぞれ径方向にスライド移動可能に保持する切刃保持部と、
前記切刃保持部を支持するシャンク部と、を備え、
前記複数の個別切刃部は、周方向に複数且つ軸方向に複数段に亘って配設され、
前記各段の複数の個別切刃部は、回転に伴う遠心力により、前記切刃保持部に対し径方向外側にそれぞれ拡開するようにスライド移動することを特徴とする拡径用ドリルビット。 - 前記各段の複数の個別切刃部は、段毎の径方向の移動ストロークが異なることを特徴とする請求項1に記載の拡径用ドリルビット。
- 前記段毎の移動ストロークは、先端に向かって順次長くなることを特徴とする請求項2に記載の拡径用ドリルビット。
- 前記各段の複数の個別切刃部は、段毎の径方向の移動ストロークが同一であることを特徴とする請求項1に記載の拡径用ドリルビット。
- 前記切刃保持部は、先端に向かって拡開する形状に形成されていることを特徴とする請求項4に記載の拡径用ドリルビット。
- 前記各個別切刃部は、基端側外周面に、前記下穴に形成した拡径部分からの引き抜きを案内するガイド部を有していることを特徴とする請求項1ないし5のいずれか一項に記載の拡径用ドリルビット。
- 前記切刃保持部は、先端部に同軸上に位置して突設した尖塔部を有し、
前記尖塔部は、超鋼材料で構成されていることを特徴とする請求項1ないし6のいずれか一項に記載の拡径用ドリルビット。 - 前記切刃保持部は、前記各段の複数の個別切刃部をスライド移動可能に保持する複数の切刃開口部を有し、
前記各個別切刃部は、
断面円弧状の研削部を含む切刃本体と、
前記切刃本体を支持すると共に、前記切刃開口部に対し径方向にスライド自在に係合するリブ部と、
前記リブ部に設けられ、前記切刃開口部に対し抜け止めとなる抜止め部と、を有していることを特徴とする請求項1ないし7のいずれか一項に記載の拡径用ドリルビット。 - 前記各段の複数の個別切刃部は、180°点対称位置に配設した2つの前記個別切刃部で構成されていることを特徴とする請求項1ないし8のいずれか一項に記載の拡径用ドリルビット。
- 前記シャンク部は、
前記切刃保持部を介して前記切刃部に冷却剤を供給するための、シャンク内流路を有するシャンク本体と、
前記シャンク内流路に連通すると共に、前記シャンク本体の先端部から前記切刃保持部における最先端段の前記複数の個別切刃部に対応する位置まで延びる冷却剤パイプと、を有していることを特徴とする請求項1ないし9のいずれか一項に記載の拡径用ドリルビット。
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JP2016522073A JP6081666B1 (ja) | 2015-04-13 | 2015-10-08 | 拡径用ドリルビット |
SG11201608694SA SG11201608694SA (en) | 2015-04-13 | 2015-10-08 | Diameter expansion drill bit |
RU2016141064A RU2635703C1 (ru) | 2015-04-13 | 2015-10-08 | Буровое долото для расширения диаметра |
US15/304,277 US10239231B2 (en) | 2015-04-13 | 2015-10-08 | Diameter expansion drill bit |
EP15877376.2A EP3103586A4 (en) | 2015-04-13 | 2015-10-08 | Diameter expansion drill bit |
CN201580011714.5A CN106255573B (zh) | 2015-04-13 | 2015-10-08 | 扩径用钻头 |
KR1020167017312A KR101837526B1 (ko) | 2015-04-13 | 2015-10-08 | 확경용 드릴 비트 |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114434662A (zh) * | 2021-12-22 | 2022-05-06 | 中铁四局集团第二工程有限公司 | 离心摆臂式铁路箱梁锚穴凿毛器 |
CN117943915A (zh) * | 2024-03-26 | 2024-04-30 | 山西富兴通重型环锻件有限公司 | 一种用于法兰盘内孔面的研磨装置 |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3085507B1 (en) * | 2014-11-20 | 2023-08-09 | FS Technical Corporation | Anchor hole formation method |
WO2016166908A1 (ja) * | 2015-04-13 | 2016-10-20 | Fsテクニカル株式会社 | 拡径用ドリルビット |
KR20180067242A (ko) * | 2016-12-12 | 2018-06-20 | 인천대학교 산학협력단 | 드릴 비트 |
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CN114352206B (zh) * | 2021-11-25 | 2024-01-12 | 湖北兴龙工具有限公司 | 扩径用钻头 |
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Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS55138055U (ja) * | 1979-03-26 | 1980-10-01 | ||
JP2001129821A (ja) * | 1999-11-04 | 2001-05-15 | Shinobu Ito | あと施工アンカーの取付孔を形成する方法および下穴拡径具 |
JP2005280243A (ja) | 2004-03-30 | 2005-10-13 | Sanko Techno Co Ltd | アンダーカットドリル装置 |
US20120070244A1 (en) * | 2009-02-19 | 2012-03-22 | Izhak Stern Y.D.E. Engineers Ltd. | Nibbling Mechanism for Construction Material |
JP2012148462A (ja) * | 2011-01-19 | 2012-08-09 | Tokyo Electric Power Co Inc:The | 切削装置及びそれを用いた工法 |
WO2014129119A1 (ja) * | 2013-02-19 | 2014-08-28 | Fsテクニカル株式会社 | 拡径用ドリルビット |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SU438773A1 (ru) * | 1973-07-02 | 1974-08-05 | Специализированный Трест По Производству Работ По Бурению Скважин На Воде | Расширитель скважин |
CH662776A5 (fr) * | 1984-08-16 | 1987-10-30 | Sarkis Sa | Outil de percage de trous a chambre et son utilisation. |
US4976323A (en) * | 1989-06-30 | 1990-12-11 | Kitchens Richard A | Counterboring device for wells |
US5233791A (en) * | 1992-03-02 | 1993-08-10 | Mcqueen Jr Joe C | Apparatus for grinding the internal surface of pipe |
US5528830A (en) * | 1994-02-18 | 1996-06-25 | Hansen; Fredrick M. | Rotary cutting tool for tubing, conduit and the like |
EP1777365B1 (en) * | 2005-10-18 | 2009-08-05 | Services Petroliers Schlumberger SA | An expandable drill bit |
US7686103B2 (en) * | 2007-06-06 | 2010-03-30 | San Juan Coal Company | Drill bit with radially expandable cutter, and method of using same |
US8308530B2 (en) * | 2009-08-31 | 2012-11-13 | Ati Properties, Inc. | Abrasive cutting tool |
WO2011137494A1 (en) * | 2010-05-07 | 2011-11-10 | Obelix Holdings Pty Ltd | Undercutting tool |
WO2012015976A1 (en) * | 2010-07-27 | 2012-02-02 | Ginn Richard S | System for sacro-iliac stabilization |
CN202964929U (zh) * | 2012-11-28 | 2013-06-05 | 雷建 | 可变径电钻钻头 |
JP6086750B2 (ja) * | 2013-02-19 | 2017-03-01 | Fsテクニカル株式会社 | 拡径用ドリルビット |
JP6126410B2 (ja) * | 2013-02-19 | 2017-05-10 | Fsテクニカル株式会社 | 拡径用ドリルビット |
WO2016166908A1 (ja) * | 2015-04-13 | 2016-10-20 | Fsテクニカル株式会社 | 拡径用ドリルビット |
-
2015
- 2015-10-08 WO PCT/JP2015/078687 patent/WO2016166908A1/ja active Application Filing
- 2015-10-08 CN CN201580011714.5A patent/CN106255573B/zh active Active
- 2015-10-08 KR KR1020167017312A patent/KR101837526B1/ko active IP Right Grant
- 2015-10-08 RU RU2016141064A patent/RU2635703C1/ru active
- 2015-10-08 JP JP2016522073A patent/JP6081666B1/ja active Active
- 2015-10-08 EP EP15877376.2A patent/EP3103586A4/en not_active Withdrawn
- 2015-10-08 US US15/304,277 patent/US10239231B2/en active Active
- 2015-10-08 SG SG11201608694SA patent/SG11201608694SA/en unknown
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS55138055U (ja) * | 1979-03-26 | 1980-10-01 | ||
JP2001129821A (ja) * | 1999-11-04 | 2001-05-15 | Shinobu Ito | あと施工アンカーの取付孔を形成する方法および下穴拡径具 |
JP2005280243A (ja) | 2004-03-30 | 2005-10-13 | Sanko Techno Co Ltd | アンダーカットドリル装置 |
US20120070244A1 (en) * | 2009-02-19 | 2012-03-22 | Izhak Stern Y.D.E. Engineers Ltd. | Nibbling Mechanism for Construction Material |
JP2012148462A (ja) * | 2011-01-19 | 2012-08-09 | Tokyo Electric Power Co Inc:The | 切削装置及びそれを用いた工法 |
WO2014129119A1 (ja) * | 2013-02-19 | 2014-08-28 | Fsテクニカル株式会社 | 拡径用ドリルビット |
Non-Patent Citations (1)
Title |
---|
See also references of EP3103586A4 * |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114434662A (zh) * | 2021-12-22 | 2022-05-06 | 中铁四局集团第二工程有限公司 | 离心摆臂式铁路箱梁锚穴凿毛器 |
CN117943915A (zh) * | 2024-03-26 | 2024-04-30 | 山西富兴通重型环锻件有限公司 | 一种用于法兰盘内孔面的研磨装置 |
CN117943915B (zh) * | 2024-03-26 | 2024-05-31 | 山西富兴通重型环锻件有限公司 | 一种用于法兰盘内孔面的研磨装置 |
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JPWO2016166908A1 (ja) | 2017-06-22 |
EP3103586A1 (en) | 2016-12-14 |
US20170136654A1 (en) | 2017-05-18 |
RU2635703C1 (ru) | 2017-11-15 |
SG11201608694SA (en) | 2017-11-29 |
CN106255573A (zh) | 2016-12-21 |
JP6081666B1 (ja) | 2017-02-15 |
KR20160135699A (ko) | 2016-11-28 |
EP3103586A4 (en) | 2018-03-28 |
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US10239231B2 (en) | 2019-03-26 |
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