WO2011036739A1 - 切削工具 - Google Patents
切削工具 Download PDFInfo
- Publication number
- WO2011036739A1 WO2011036739A1 PCT/JP2009/066462 JP2009066462W WO2011036739A1 WO 2011036739 A1 WO2011036739 A1 WO 2011036739A1 JP 2009066462 W JP2009066462 W JP 2009066462W WO 2011036739 A1 WO2011036739 A1 WO 2011036739A1
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- WO
- WIPO (PCT)
- Prior art keywords
- blade
- hole
- cutting tool
- axis
- cutting
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B51/00—Tools for drilling machines
- B23B51/04—Drills for trepanning
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- 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
- B23B2226/27—Composites
- B23B2226/275—Carbon fibre reinforced carbon composites
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2265/00—Details of general geometric configurations
- B23B2265/12—Eccentric
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T408/00—Cutting by use of rotating axially moving tool
- Y10T408/89—Tool or Tool with support
- Y10T408/893—Hollow milling Tool
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T408/00—Cutting by use of rotating axially moving tool
- Y10T408/89—Tool or Tool with support
- Y10T408/895—Having axial, core-receiving central portion
Definitions
- the present invention relates to a cutting tool, and more particularly to a cutting tool capable of preventing chip clogging.
- Fiber drilling with a fiber reinforced composite material typified by FRP (fiber reinforced plastic), especially CFRP (carbon fiber reinforced plastic) as the work material because the internal fibers are difficult to cut, the fibers are tangled and the peripheral wall of the hole There is a problem that fluffing occurs, or the laminated fiber layer is peeled off and delamination occurs on the peripheral wall of the hole. Further, chips generated by drilling a fiber reinforced composite material contain a large amount of fibers. When these chips are scattered, the working environment is deteriorated. Therefore, there has been a demand for reducing the amount of generated chips.
- FRP fiber reinforced plastic
- CFRP carbon fiber reinforced plastic
- Patent Document 1 A drilling tool including a chip discharge groove 12 formed on the outer periphery and a tip 13 fixed to a tip ridge line portion of the chip discharge groove 12 is disclosed (Patent Document 1).
- Patent Document 1 since cutting is not performed in the vicinity of the axis O of the tool body 10, the work material inside the hole 10a is cut out by the cutting edge 16 of the tip 13, and the inside of the hole 10a. Remain in. Furthermore, since only the portion where the cutting edge 16 is cut becomes chips, the amount of generated chips can be reduced.
- the present invention has been made to solve the above-described problems, and an object thereof is to provide a cutting tool capable of preventing chip clogging.
- a cutting tool is formed by a body rotated about an axis, a hole opening in a front end surface of the body, the hole and an outer peripheral surface of the body.
- the blade portion includes a bottom blade formed at the tip in the axial direction, and an inner side surface that passes through the inner edge of the bottom blade and intersects with a rake face and a ridge line, and the inner side surface is
- the rotation trajectory passing through the inner edge of the bottom blade is a cylindrical bottom surface and is inclined in a direction away from the virtual cylindrical side surface along the axial center as it goes in the direction opposite to the rotation of the body.
- the axis of the body is configured to deviate from the axis of the hole.
- the cutting tool according to claim 3 is the cutting tool according to claim 2, wherein the blade portion is formed or held at the thickest portion of the wall portion.
- the cutting tool according to claim 4 is a body rotated about an axis, a hole opening in a front end surface of the body, a wall formed by the hole and an outer peripheral surface of the body, and the wall A notch portion that is notched from the tip surface of the portion and communicates with the hole portion, and a blade portion that is formed or held at a portion where the notch portion intersects the tip surface of the wall portion, and the blade portion is A bottom blade formed at the tip in the axial direction, and an inner side surface that passes through the inner edge of the bottom blade and intersects with a rake face via a ridge line, and the ridge line is formed by the inner edge of the bottom blade. It inclines in the direction away from the front end surface of the body toward the rear end side with respect to a straight line parallel to the axis passing through.
- the cutting tool according to claim 5 is the cutting tool according to claim 4, wherein a plurality of the notch portions are formed in the wall portion, and the blade portion is a portion where the notch portion intersects the tip surface of the wall portion. Formed or held in each of the.
- a cutting tool according to a sixth aspect is the cutting tool according to any one of the first to fifth aspects, wherein the blade portion includes an outer peripheral blade that intersects with the bottom blade via an outer peripheral corner.
- the cutting tool according to claim 7 is the cutting tool according to any one of claims 1 to 6, wherein the hole is penetrated from a front end surface of the body to a rear end, and a rear end side is a front end side. It is formed with a larger diameter.
- the body rotated about the axis, the hole opening in the front end surface of the body, the wall formed by the hole and the outer peripheral surface of the body, A notch portion that is notched from the tip surface of the wall portion and communicates with the hole portion, and a blade portion that is formed or held at a portion where the notch portion intersects the tip surface of the wall portion, the blade portion at the tip end in the axial direction Since the bottom blade to be formed is provided, the work material is cut out by the bottom blade.
- the workpiece to be cut out is formed in a cylindrical shape having a cylindrical trajectory along the axial center with the rotation trajectory of the inner end of the bottom blade as a cylindrical bottom surface.
- the blade portion has an inner side surface that passes through the inner edge portion of the bottom blade and intersects with the rake face via a ridge line, and the inner side surface has a rotation trajectory passing through the inner edge portion of the bottom blade as a cylindrical bottom surface. It is inclined in a direction away from the virtual cylindrical side surface along the center toward the opposite direction of the body rotation. This inclination makes it easy to discharge chips in the direction opposite to the rotation of the blade portion, and thus has an effect of preventing chip clogging.
- the axis of the body is configured to deviate from the axis of the hole, the axis of the body and the hole A clearance corresponding to the amount of deviation from the axial line can be formed on the inner side surface and wall portion of the blade portion. Since the relief can be formed by providing a hole that is eccentric from the axis of the body, the cutting tool can be easily manufactured, and the productivity of the cutting tool can be improved.
- the blade portion is formed or held at the thickest portion of the wall portion.
- a relief can be provided in the part.
- the body rotated around the axis, the hole opening in the tip surface of the body, the wall formed by the hole and the outer peripheral surface of the body, A notch portion that is notched from the tip surface of the wall portion and communicates with the hole portion, and a blade portion that is formed or held at a portion where the notch portion intersects the tip surface of the wall portion, the blade portion at the tip end in the axial direction Since the bottom blade to be formed is provided, the work material is cut out by the bottom blade.
- the work material to be cut out is formed in a cylindrical shape having a cylindrical side surface parallel to an axis centered on the rotation locus of the inner end portion of the bottom blade.
- the blade portion includes a rake face and an inner side surface that intersects with the ridge line while passing through the inner edge portion of the bottom blade, and the ridge line is in a straight line parallel to the axis passing through the inner edge portion of the bottom blade.
- the body is inclined away from the front end surface toward the rear end side. This inclination makes it easy to discharge chips to the rear end side of the hole, and thus has an effect of preventing chip clogging.
- a plurality of notches are formed in the wall, and the blade has a notch that intersects the tip surface of the wall. Since it is formed or held in each of the parts, by making the number of blades plural, if the cutting speed and the feeding speed are the same, the feeding speed per tooth can be reduced, so the effect of improving the surface roughness can be obtained. is there. Furthermore, it is possible to suppress eccentricity and chatter vibration during cutting, and to prevent an increase in the hole diameter of the work material and breakage of the cutting tool.
- the blade portion includes an outer peripheral blade that intersects with the bottom blade via an outer peripheral corner. Cutting can be performed by cutting the outer peripheral corner into the work surface and cutting the work material. Further, the outer peripheral blade cuts off the inner peripheral portion of the hole formed in the work material. Thereby, there exists an effect which can improve the surface roughness of the hole formed in a work material.
- the hole is penetrated from the front end surface to the rear end of the body, Since the end side is formed with a diameter larger than the front end side, chips introduced into the hole during cutting can be easily discharged to the rear end side, and the effect of preventing chip clogging more efficiently can be obtained. is there.
- FIG. 1 is a front view of the cutting tool in 1st Embodiment of this invention
- (b) is a side view of the cutting tool in the arrow Ib direction view of Fig.1 (a)
- FIG. It is a side view of the cutting tool in the arrow Ic direction view of (a).
- (A) is a perspective view of the blade part of a cutting tool, and its vicinity,
- (b) is an enlarged view of the tip side shown in Drawing 1 (a) of a cutting tool.
- A) is a front view of the cutting tool in 2nd Embodiment
- (b) is a front view of the cutting tool in 3rd Embodiment.
- (A) is a side view of the cutting tool in 4th Embodiment
- (b) is a side view of the cutting tool in 5th Embodiment.
- (A) is a front view of the cutting tool in 6th Embodiment
- (b) is a side view of the cutting tool in the arrow Vb direction view of Fig.5 (a)
- (c) is a perspective view of a blade part.
- (D) is a partially enlarged side view of the cutting tool showing an enlarged portion indicated by Vd in FIG. 5 (b).
- FIG. 1A is a front view of the cutting tool according to the first embodiment of the present invention
- FIG. 1B is a side view of the cutting tool as viewed in the direction of arrow Ib in FIG. (C) is a side view of the cutting tool as viewed in the direction of arrow Ic in FIG.
- the arrow illustrated in FIG. 1A indicates the rotation direction of the cutting tool.
- FIG.1 (b) and FIG.1 (c) illustration of the intermediate part of the axial direction of a cutting tool is abbreviate
- the cutting tool 1 includes a body 2, a hole 3 that opens to the front end surface 2 a of the body 2, and a wall 4 that is formed by the hole 3 and the outer peripheral surface 2 b of the body 2.
- the notch 5 cut out from the tip surface 2a of the wall 4 and communicated with the hole 3 and the blade 6 formed at the portion where the notch 5 and the tip surface 2a of the wall 4 intersect are mainly used. It is prepared for.
- the cutting tool 1 is configured as a solid type in which the blade portion 6 and the shank 7 are integrated with the body 2.
- the cutting tool 1 is rotated about the axis O by transmitting the rotational force of a processing machine such as a machining center (not shown) via a shank 7 formed on the rear end side of the body 2 (see FIG. 1 (a) in the direction of the arrow), the workpiece can be cut.
- a processing machine such as a machining center (not shown)
- shank 7 formed on the rear end side of the body 2 (see FIG. 1 (a) in the direction of the arrow)
- the body 2 is formed of a cemented carbide or high-speed tool steel into a substantially shaft-like body, and the rear end side is a part attached to the processing machine via the shank 7.
- a blade portion 6 is provided on the end surface (tip surface 2 a) of the body 2 opposite to the shank 7.
- the outer peripheral surface 2b of the body 2 is formed with a back taper 2c whose outer diameter is reduced from the front end surface 2a toward the rear end within a predetermined range from the front end surface 2a. By forming the back taper 2c, the feed movement in the axial direction of the body 2 can be performed smoothly.
- the inclination angle ⁇ 1 (see FIG. 1B) of the distal end surface 2a with respect to a cross section (axial cross section perpendicular to the axis O of the body 2) is configured to be 2 to 10 °.
- both cutting efficiency and processing accuracy of the cutting tool 1 can be achieved.
- the inclination angle ⁇ 1 of the distal end surface 2a becomes smaller than 2 °, the cutting depth during cutting tends to decrease and the cutting efficiency tends to decrease.
- the inclination angle ⁇ 1 becomes larger than 10 °, the wall portion 4 is easily bent, and chatter vibration is generated, and the machining accuracy tends to be lowered.
- the body 2 is provided with a hole 3 that opens to the front end surface 2a.
- the hole 3 is a part in which chips during cutting are accommodated.
- the hole 3 in the cross section perpendicular to the axis of the body 2, the hole 3 is formed so that the cross-sectional outline is substantially circular.
- the hole 3 has the same diameter from the front end surface 2 a of the body 2 to the shank 7, and is formed to penetrate in parallel with the axis O. Since the hole 3 is formed so as to penetrate from the front end surface 2a to the shank 7, by connecting a suction device (not shown) to the shank 7, chips generated during cutting are sucked from the hole 3 and It is possible to prevent chips from being scattered.
- the ratio (s / S) of the area s of the cross-sectional outline of the hole 3 to the area S of the cross-sectional outline of the outer peripheral surface 2b of the body 2 is 0.5 to 0.8. Is preferred. Thereby, both suppression of chip clogging and securing of the rigidity of the wall portion 4 can be achieved. Note that, as the ratio (s / S) becomes smaller than 0.5, the amount of work material to be cut increases, so that the amount of chip generation increases and chip clogging tends to occur. On the other hand, as it becomes larger than 0.8, the thickness of the wall portion 4 becomes thinner and the rigidity of the wall portion 4 tends to decrease.
- the hole 3 is formed at a position where the axis c thereof is deviated from the axis O of the body 2, and the axis c of the hole 3 is centered toward the rear end of the body 2 on the front end surface 2 a. It is located in the part which inclines and descends from O (FIG. 1 (a) and FIG. 1 (b) upper side, FIG.1 (c) paper surface back side).
- a wall 4 is formed by the outer peripheral surface of the hole 3 and the body 2. Since the axis c of the hole 3 and the axis O of the body 2 are deviated, the thickness of the wall 4 is nonuniform along the rotational direction as shown in FIG. Yes.
- the amount of deviation between the axis c of the hole 3 and the axis O of the body 2 depends on the outer diameter A of the body 2 but is 0.01 mm or more and 0.5 mm or less. Is preferred. Further, the ratio (a / A) of the eccentricity a to the outer diameter A of the body 2 is preferably 0.8 or less. Thereby, both suppression of chip clogging and securing of the rigidity of the wall portion 4 can be achieved.
- the amount of eccentricity is smaller than 0.01 mm, the gap (relief) between the cylindrical side surface (described later) and the hole 3 of the work material that is hollowed out by the bottom blade 6a and the hole 3 becomes small, and thus chips are clogged. Is likely to occur. If the amount of eccentricity exceeds 0.5 mm or the ratio a / A exceeds 0.8, the thickness of the wall portion 4 on the eccentric side (the upper side in FIG. 1 (a)) becomes thin and easily breaks. .
- the notch portion 5 is a portion that is notched from the front end surface 2 a of the wall portion 4 and communicates with the hole portion 3, and is a portion that guides chips during cutting to the hole portion 3.
- the notch 5 is the thickest part of the wall 4 on the front end surface 2a (the part where the straight line s passing through the axis O starting from the axis c and the wall 4 intersects in the front end view in the direction of the axis O).
- a) Lower side is cut out with a predetermined opening width in the rotation direction (arrow direction in FIG. 1A) from the start point to the end point 5a.
- the end 5a of the notch 5 is not formed from the outer peripheral surface 2b toward the axis O, but toward the line where the plane passing through the axis O and the axis c and the inner peripheral surface of the hole 3 intersect.
- the outer peripheral surface 2b is formed. Thereby, the thickness of the wall part 4 in the direction opposite to the rotation (the direction opposite to the arrow in FIG. 1A) can be gradually reduced from the blade part 6 to the terminal end 5 a of the notch part 5.
- the central angle ⁇ 2 with respect to the wall 4 (see FIG. 1A) is set to about 240 °, but the central angle ⁇ 2 is 90 ° to 270 ° (the central angle with respect to the notch 5). Can be appropriately set within a range of 270 ° to 90 °. Thereby, both suppression of chip clogging and securing of centripetalness can be achieved.
- the central angle ⁇ 2 becomes smaller than 90 °, the centripetality is lowered, and the rigidity of the wall portion 4 is lowered and tends to be broken.
- the central angle ⁇ 2 becomes larger than 270 °, the opening width of the notch portion 5 becomes narrower, so that chips generated during cutting are less likely to enter the notch portion 5 and chip clogging tends to occur. Be looked at.
- the length l from the bottom blade 6a in the axial direction of the notch 5 is preferably 0.1 mm or more and less than the thickness of the work material.
- improvement of cutting efficiency and ensuring of the rigidity of the wall part 4 can be made compatible.
- the length l of the notch 5 becomes shorter than 0.1 mm, it is difficult to increase the depth of cut during cutting, and thus the cutting efficiency tends to decrease.
- the length 1 of the notch portion 5 becomes longer than the thickness of the work material, the rigidity of the wall portion 4 decreases, and chatter vibration tends to occur and it tends to break.
- the blade portion 6 includes a bottom blade 6a formed at the tip in the direction of the axis O.
- the bottom blade 6 a is formed in a portion where the notch portion 5 and the tip end surface 2 a of the wall portion 4 intersect with each other in parallel with the cross section perpendicular to the axis of the body 2.
- the blade portion 6 includes an outer peripheral blade 6c that intersects with the bottom blade 6a via an outer peripheral corner 6b.
- the outer peripheral blade 6c is formed in parallel to the axis O as a straight blade connected to the intersecting ridge line 2d (see FIG. 1C) between the notch portion 5 and the outer peripheral surface 2b of the body 2.
- the clearance angle ⁇ 3 (see FIG. 1C) of the flank 6d of the blade portion 6 is preferably 2 ° to 10 °.
- the clearance angle ⁇ 3 becomes smaller than 2 °, the flank wear tends to increase.
- the clearance angle ⁇ 3 becomes larger than 10 °, the blade edge strength tends to decrease and the bottom blade 6a tends to be damaged.
- FIG. 2A is a perspective view of the blade portion 6 of the cutting tool 1 and the vicinity thereof
- FIG. 2B is an enlarged view of the tip surface 2a of the cutting tool 1 shown in FIG. Note that the arrows illustrated in FIG. 2B indicate the rotation direction of the cutting tool 1.
- the blade portion 6 includes an inner side surface 6h that passes through the inner end portion 6e of the bottom blade 6a and intersects with the rake face 6f and the ridgeline 6g.
- the inner side surface 6h is a virtual cylindrical side surface (rotating along the axis O) along the axis O with the rotation locus r passing through the inner end 6e of the bottom blade 6a as the cylindrical bottom surface. It is inclined in a direction away from the rotation direction of the body B (the direction opposite to the arrow in FIG. 1A) with respect to the surface r obtained by continuing the locus r from the front side to the back side of the paper. As shown in FIG.
- the cutting tool 1 has a tangent t of the cross-sectional outline of the hole 3 at the inner end 6e of the bottom blade 6a and the bottom blade 6a in the front end view in the direction of the axis O. Are configured orthogonally.
- the inner end portion 6e has a cylindrical trajectory r and a cylindrical bottom surface along the axis O.
- the inner side surface 6h is inclined in a direction away from the body 2 in the direction opposite to the rotation of the body 2 (the direction opposite to the arrow in FIG. 1A). Relief is given in the opposite direction), making it easier to discharge chips. Thereby, chip clogging of the cutting tool 1 can be prevented.
- the inclination of the inner side surface 6h is formed by shifting the axis c of the hole 3 with respect to the axis O of the body 2 and drilling the hole 3 in the body 2, so that the cutting tool 1 can be easily formed. It can be manufactured and productivity can be improved.
- the blade portion 6 since the blade portion 6 is formed at the thickest portion of the wall portion 4 (the portion where the straight line s passing through the axis O starting from the axis c of the hole portion 3 intersects the wall portion 4), the blade portion 6 rotates. Relief can be given to the inner peripheral surface of the wall portion 4 in the opposite direction. As a result, friction between the wall portion 4 in the direction opposite to the rotation of the blade portion 6 and the work material can be avoided, so that the inner end portion 6e of the bottom blade 6a can be stably fed into the work material, and cutting can be performed. Can be improved.
- the wall portion 4 is gradually formed thin from the blade portion 6 to the terminal end 5a of the notch portion 5, it is possible to suppress interference between the work material to be cut out and the cutting tool 1. As a result, the eccentricity and chatter vibration of the cutting tool 1 during cutting can be suppressed, and breakage can be prevented.
- the cutting tools 11 and 21 in the second embodiment and the third embodiment will be described with reference to FIG.
- the tangent t of the cross-sectional outline of the hole 3 at the inner end 6e of the bottom blade 6a and the bottom blade 6a are configured to be orthogonal to each other when viewed from the front end in the direction of the axis O.
- the case where the central angle ⁇ 2 with respect to the portion 4 is set to about 240 ° has been described.
- the tangent t of the cross-sectional contour line of the hole 3 at the inner end portion 16e of the bottom blade 16a and the bottom blade 16a are 90 in the front end view in the direction of the axis O.
- FIG. 3A is a front view of the cutting tool 11 according to the second embodiment of the present invention
- FIG. 3B is a front view of the cutting tool 21 according to the third embodiment of the present invention.
- the bottom blade 16a formed on the blade portion 16 of the cutting tool 11 has a cross-sectional contour of the hole 3 at the inner end portion 16e of the bottom blade 16a in the front end view in the direction of the axis O. It intersects with the tangent t of the line at an angle ⁇ 4 exceeding 90 °.
- the angle ⁇ 4 is preferably 90 ° ⁇ 4 ⁇ 100 °. This makes it possible to achieve both cutting performance and tool life, reduce the chip thickness, reduce the variation in cutting resistance, and suppress chatter vibration.
- the cutting ability tends to decrease
- the angle ⁇ 4 becomes larger than 100 °
- the edge strength on the outer peripheral side tends to decrease and the chip tends to be broken, and the tool life tends to decrease.
- the cutting edge tends to bite into the work material, and undulation tends to occur on the inner wall of the hole in the work material.
- the blade portion 26 of the cutting tool 21 is formed with the bottom blade 26 a inserted in the tip end in the direction of the axis O.
- both the inner end portion 26e and the outer peripheral corner 26b are cut first into the work material, so that the machinability can be improved.
- the cutting tools 11 and 21 in the second embodiment and the third embodiment are configured so that the central angle ⁇ 2 of the wall portions 14 and 24 is about 180 °, and therefore the cutting tool 1 in the first embodiment.
- the opening width of the notches 15 and 25 can be improved.
- chips can be easily guided from the notches 15 and 25 to the hole 3, and chip clogging can be suppressed.
- center angle (theta) 2 of wall parts 14 and 24 is comprised at about 180 degrees, the terminal ends 15a and 25a of the notches 15 and 25 of the cutting tools 11 and 21 are toward the axial center O from the outer peripheral surface 2b. Is formed.
- the thickness of the wall portions 14 and 24 in the direction opposite to the rotation is changed from the blade portions 16 and 26 to the terminal ends 15a and 25a of the notches 15 and 25.
- the thickness can be gradually reduced.
- the cutting tools 1, 11 and 21 can be appropriately selected to be suitable for the hardness and rigidity of the work material.
- the cutting tools 31 and 41 in 4th Embodiment and 5th Embodiment are demonstrated.
- the hole 3 is formed in the same diameter from the front end surface 2 a to the rear end side of the body 2 so as to penetrate in parallel with the axis O, and the outer peripheral blade 6 c is a straight line parallel to the axis O. The case where it was comprised as a blade was demonstrated.
- the hole 33 is formed so as to penetrate from the front end surface 2a of the body 2 to the rear end side, and the outer peripheral blade 36c has a shaft. The case where it is comprised as the twist blade twisted with respect to the center O is demonstrated.
- FIG. 4A is a side view of the cutting tool 31 according to the fourth embodiment of the present invention
- FIG. 5B is a side view of the cutting tool 41 according to the fifth embodiment of the present invention.
- the outer peripheral blade 36c of the cutting tool 31 is configured as a twisted blade twisted with respect to the axis O.
- the torsion angle of the outer peripheral blade 36c can be appropriately set according to the hardness, rigidity, etc. of the work material.
- the cutting force is divided into the component forces in the axial direction and the feed direction, the cutting resistance in the feed direction can be reduced and the burden of cutting can be distributed and heavy cutting compared to the case of a straight blade. (Increase in feed speed and cutting depth) is possible.
- the hole 33 of the cutting tool 31 is formed so as to penetrate from the front end surface 2a of the body 2 to the rear end thereof, chips introduced into the hole 33 during cutting are removed. It can be easily discharged to the rear end side, and chip clogging can be prevented more efficiently.
- the outer peripheral blade 46c of the cutting tool 41 is configured as a curved twist blade.
- the same cutting is performed with a long cutting edge.
- the burden of cutting is further dispersed, and further heavy cutting is possible depending on the hardness and rigidity of the work material.
- the hole 43 of the cutting tool 41 is formed with a bottom.
- the hole 43 is formed in a circular shape having the same diameter from the front end surface 2 a to the bottom surface 43 a of the body 2.
- the depth of the hole 43 is set to be equal to or greater than the thickness of the work material.
- FIG. 5A is a front view of the cutting tool 51 in the sixth embodiment
- FIG. 5B is a side view of the cutting tool 51 as viewed in the direction of the arrow Vb in FIG.
- FIG. 5C is a perspective view of the blade portion 56, and FIG.
- FIG. 5D is a partially enlarged side view of the cutting tool 51 showing an enlarged portion indicated by Vd in FIG. 5B.
- the arrows illustrated in FIG. 5A indicate the rotation direction of the cutting tool 51.
- illustration of the intermediate part of the axial direction of the cutting tool 51 is abbreviate
- the cutting tool 51 includes a body 2, a hole 53 that opens to the front end surface 2 a of the body 2, and a wall 54 that is formed by the hole 53 and the outer peripheral surface 2 b of the body 2.
- the cutout 55 is cut out from the front end surface 2a of the wall portion 54 and communicated with the hole 53, and the blade portion 56 held at the portion where the cutout portion 55 and the front end surface 2a of the wall portion 54 cross each other. It is prepared for.
- the blade portion 56 is constituted by a chip and joined to the body 2 by brazing.
- the body 2 includes a hole 53 that opens to the front end surface 2a.
- the hole 53 in the cross section perpendicular to the axis of the body 2, the hole 53 is formed in a substantially circular cross-sectional outline.
- the axis c of the hole 53 coincides with the axis O of the body 2, and the hole 53 is formed concentrically with the body 2.
- the hole 53 has the same diameter from the front end surface 2 a to the rear end of the body 2, and is formed to penetrate in parallel to the axis O.
- the notches 55 are formed by cutting out to a predetermined length in the axial direction at equal intervals from the three positions of the front end surface 2a of the wall 54 with equal opening widths. Blade portions 56 (tips) are held at portions (three places) where the notch portion 55 and the tip surface 2a of the wall portion 54 intersect.
- the blade portion 56 intersects with the rake face 56f and the ridge line 56g while passing through the bottom blade 56a formed at the tip in the direction of the axis O and the inner end portion 56e of the bottom blade 56a (see FIG. 5C).
- An inner side surface 56h is mainly provided.
- the blade portion 56 includes an outer peripheral blade 56c that intersects with the bottom blade 56a via an outer peripheral corner 56b.
- the inner end 56 e of the bottom blade 56 a is configured to protrude inward (axial center O side) from the contour line of the hole 53.
- a ridge line 56g (see FIG.
- the work surface is cut into a cylindrical shape by cutting the work surface with the bottom blade 56a.
- the cylindrical side surface of the workpiece to be hollowed out has a cylindrical shape with the cylindrical bottom surface taken along the rotation locus of the inner end portion 56e of the bottom blade 56a and the cylindrical side surface along the axis O.
- the cylindrical side surface includes a straight line u parallel to the axis O passing through the inner end portion 56e of the bottom blade 56a.
- the cutting tool 51 has a ridge line 56g between the inner side surface 56h and the rake face 56f with respect to a straight line u parallel to the axis O passing through the inner end portion 56e of the bottom blade 56a from the front end surface 2a of the body 2 to the rear end side. Since it inclines in the direction which leaves
- the notch portion 55 is formed at three locations, and the blade portion 56 is held at each of the portions where the notch portion 55 intersects the tip surface 2a of the wall portion 54. If the cutting speed and the feed speed are the same, the feed speed per blade can be reduced, and the surface roughness can be improved. Thereby, it can prevent that delamination arises in fiber reinforced composite materials, such as CFRP. Furthermore, eccentricity and chatter vibration during cutting can be suppressed, and the enlargement of the hole diameter of the work material and breakage of the cutting tool 51 can be prevented.
- the inclination angle ⁇ 5 of the ridge line 56g with respect to the straight line u can be set as appropriate within a range of 2 ° to 10 °.
- the inclination angle ⁇ 5 in the range of 2 ° to 10 °, it is possible to prevent chip clogging by giving an appropriate clearance, and to secure the strength of the blade edge.
- the clearance becomes smaller and chip clogging tends to occur more easily.
- the inclination angle ⁇ 5 becomes larger than 10 °, the cutting edge strength decreases and the tool life tends to decrease.
- the clearance angle of the flank 56d (see FIG. 5C) of the blade portion 56 is preferably 2 ° to 10 °. Thereby, both reduction of flank wear and securing of cutting edge strength can be achieved. As the clearance angle becomes smaller than 2 °, the flank wear tends to increase. As the clearance angle becomes larger than 10 °, the cutting edge strength tends to decrease and the bottom blade 6a tends to be damaged.
- the durability test performed using the cutting tool 1 configured as described above will be described.
- the durability test the total number of through-holes that can be continuously processed without causing delamination on the inner wall of the hole when the work material is drilled under a predetermined condition by the cutting tool 1. It is a test to measure.
- the test is made concentrically with the body 2 in place of the cutting tool 1 described in the first embodiment (hereinafter referred to as “the product of the present invention”) and the eccentric hole 3 of the cutting tool 1.
- the product of the present invention has an outer diameter of the body 2 of 6.35 mm, an inner diameter of the hole 3 of 5.175 mm, a deviation amount (eccentricity) between the axis c of the hole 3 and the axis O of the body 2 of 0.3 mm,
- the central angle ⁇ 2 with respect to the wall portion 4 is 240 °.
- the conventional product is different only in that the amount of eccentricity is 0, and the other configuration is the same as that of the product of the present invention.
- both the product of the present invention and the conventional product are a work material: CFRP (carbon fiber reinforced plastic) with a thickness of 19 mm, a machine used: a vertical machining center, a cutting fluid: an emulsion type, and the cutting speed and feed speed are the same. The test was originally performed.
- CFRP carbon fiber reinforced plastic
- the cutting tool 1 demonstrated the case where the blade part 6 and the shank 7 were comprised as a solid type united with the body 2, it is not necessarily limited to this, Other It is also possible to apply to other types.
- Other types include, for example, a type in which the blade (chip) is joined to the body by brazing, a throw-away type with a replaceable blade tip, and a body and shank formed separately and joined by fastening or welding. Type to do.
- the back taper 2c is formed on the outer peripheral surface 2b of the body 2 to give relief in the feed direction, but the present invention is not necessarily limited to this. In place of the back taper 2c, it is also possible to give relief in the direction opposite to the rotation of the outer peripheral surface 2b of the body 2.
- the holes 3, 33, 43, and 53 have been described in the case where the shape of the cross-sectional outline is a circular shape when viewed from the front end.
- the shape is not necessarily limited to this, and other shapes and It is also possible to do. Examples of other shapes include an elliptical shape, an oval shape, and a polygonal shape. Since chips can be accommodated also in these holes, the same effect is obtained.
- the blade portion 56 is configured with a chip.
- the present invention is not necessarily limited to this, and the blade portion 56 may be configured integrally with the body 2.
- the blade part 56 was hold
Abstract
Description
2 ボデー
2a 先端面
2b 外周面
3,33,43,53 孔部
4,14,24,54 壁部
5,55 切欠部
6,16,26,56 刃部
6a,16a,26a,56a 底刃
6e,26e,56e 内側端部
6f,56f すくい面
6g,56g 稜線
6h,56h 内側側面
6b,26b 外周コーナ
6c,36c,46c,56c 外周刃
c 軸線
O 軸心
r 回転軌跡
Claims (7)
- 軸心回りに回転されるボデーと、そのボデーの先端面に開口する孔部と、その孔部および前記ボデーの外周面により形成される壁部と、その壁部の先端面から切欠され前記孔部に連通する切欠部と、その切欠部が前記壁部の先端面に交わる部位に形成または保持される刃部とを備える切削工具において、
前記刃部は、軸心方向の先端に形成される底刃と、
その底刃の内側端部を通りつつ、すくい面と稜線を介して交わる内側側面とを備え、
前記内側側面は、前記底刃の内側端部を通る回転軌跡を円筒底面とし前記軸心に沿う仮想の円筒側面に対して、前記ボデーの回転反対方向に向かうにつれて離れる方向に傾斜していることを特徴とする切削工具。 - 前記ボデーの軸心は、前記孔部の軸線とずれて構成されていることを特徴とする請求項1記載の切削工具。
- 前記刃部は、前記壁部の最も厚い部位に形成または保持されていることを特徴とする請求項2記載の切削工具。
- 軸心回りに回転されるボデーと、そのボデーの先端面に開口する孔部と、その孔部および前記ボデーの外周面により形成される壁部と、その壁部の先端面から切欠され前記孔部に連通する切欠部と、その切欠部が前記壁部の先端面に交わる部位に形成または保持される刃部とを備える切削工具において、
前記刃部は、軸心方向の先端に形成される底刃と、
その底刃の内側端部を通りつつ、すくい面と稜線を介して交わる内側側面とを備え、
前記稜線は、前記底刃の内側端部を通る前記軸心と平行な直線に対して、前記ボデーの先端面から後端側に向かうにつれて離れる方向に傾斜していることを特徴とする切削工具。 - 前記切欠部は前記壁部に複数形成されており、前記刃部は、前記切欠部が前記壁部の先端面に交わる部位の各々に形成または保持されていることを特徴とする請求項4記載の切削工具。
- 前記刃部は、前記底刃と外周コーナを介して交わる外周刃を備えていることを特徴とする請求項1から5のいずれかに記載の切削工具。
- 前記孔部は、前記ボデーの先端面から後端に亘って貫通されており、後端側が先端側より拡径して形成されていることを特徴とする請求項1から6のいずれかに記載の切削工具。
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA2719726A CA2719726C (en) | 2009-09-23 | 2009-09-23 | Cutting tool |
CN2009801218580A CN102083597B (zh) | 2009-09-23 | 2009-09-23 | 切削工具 |
PCT/JP2009/066462 WO2011036739A1 (ja) | 2009-09-23 | 2009-09-23 | 切削工具 |
US12/736,364 US8753049B2 (en) | 2009-09-23 | 2009-09-23 | Cutting tool |
DE112009005271T DE112009005271T5 (de) | 2009-09-23 | 2009-09-23 | Schneidwerkzeug |
JP2010511008A JP5431310B2 (ja) | 2009-09-23 | 2009-09-23 | 切削工具 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2009/066462 WO2011036739A1 (ja) | 2009-09-23 | 2009-09-23 | 切削工具 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2011036739A1 true WO2011036739A1 (ja) | 2011-03-31 |
Family
ID=43781896
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2009/066462 WO2011036739A1 (ja) | 2009-09-23 | 2009-09-23 | 切削工具 |
Country Status (6)
Country | Link |
---|---|
US (1) | US8753049B2 (ja) |
JP (1) | JP5431310B2 (ja) |
CN (1) | CN102083597B (ja) |
CA (1) | CA2719726C (ja) |
DE (1) | DE112009005271T5 (ja) |
WO (1) | WO2011036739A1 (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2011235407A (ja) * | 2010-05-11 | 2011-11-24 | Next I&D株式会社 | 穿孔装置 |
JP2013141708A (ja) * | 2012-01-06 | 2013-07-22 | Honda Motor Co Ltd | バリ取り工具 |
JP6835194B1 (ja) * | 2019-12-12 | 2021-02-24 | 株式会社タンガロイ | 穴あけ工具 |
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US20130164088A1 (en) * | 2011-12-21 | 2013-06-27 | Peter Diamantis | Drill for composite materials |
JP6561442B2 (ja) * | 2014-09-10 | 2019-08-21 | キョーラク株式会社 | 被加工物の加工方法、穴あけドリル |
FR3040322B1 (fr) * | 2015-08-25 | 2018-03-30 | Safran Aircraft Engines | Outil de percage |
CN105500466A (zh) * | 2016-01-08 | 2016-04-20 | 苏州市职业大学 | 一种木材切断机 |
JP6828336B2 (ja) * | 2016-09-16 | 2021-02-10 | 株式会社ジェイテクト | 加工方法 |
DE102017103592A1 (de) | 2017-02-22 | 2018-08-23 | Gühring KG | Bohrwerkzeug für Faserplatten |
CN111085787B (zh) * | 2019-12-16 | 2022-02-22 | 安徽高德铝业有限公司 | 一种铝材加工用旋切装置 |
CN115609695B (zh) * | 2022-12-20 | 2023-03-10 | 诸城华源生物质科技有限公司 | 一种车间生产废木料切断设备 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB256153A (en) * | 1926-03-19 | 1926-08-05 | John Gell | Improvements in and relating to lathe & like tools |
US2556745A (en) * | 1946-10-08 | 1951-06-12 | Zimmermann Lukas | Cutting tool |
US4338050A (en) * | 1980-07-07 | 1982-07-06 | The Boeing Company | Method and tool for generating holes in composite materials |
JPS60228011A (ja) * | 1984-04-09 | 1985-11-13 | サントレード リミテツド | ワークピースに孔を明けるドリル |
JPH02237707A (ja) * | 1989-03-09 | 1990-09-20 | Mitsubishi Metal Corp | 穴明け工具 |
US6273652B1 (en) * | 1999-09-10 | 2001-08-14 | Woodworker's Supply | Plug cutter with radial relief and plug ejecting portion |
Family Cites Families (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US640108A (en) * | 1899-06-17 | 1899-12-26 | Henry M Dalzell | Tubular crown-saw. |
US1187618A (en) * | 1915-12-07 | 1916-06-20 | Nat Acme Mfg Co | Metal-turning tool. |
US2062257A (en) * | 1934-12-18 | 1936-11-24 | Harry Barker | Tubular saw |
US2674908A (en) * | 1953-05-25 | 1954-04-13 | John R Willingham | Gun drilling tool |
US2847885A (en) * | 1956-08-02 | 1958-08-19 | Cleveland Twist Drill Co | Deep hole drill |
US2869405A (en) * | 1957-06-05 | 1959-01-20 | American Iron & Machine Works | Trepanning head |
US3592554A (en) * | 1968-08-05 | 1971-07-13 | Akio Takahara | Trepan boring tool |
SU529910A2 (ru) * | 1972-01-07 | 1976-09-30 | Институт сверхтвердых материалов АН Украинской ССР | Алмазное сверло |
JPS5325983A (en) * | 1976-08-24 | 1978-03-10 | Sumitomo Metal Ind Ltd | Method and device for extracting test piece from metal material |
US4322187A (en) * | 1980-06-18 | 1982-03-30 | Hougen Everett D | Annular hole cutter |
JPS5854921B2 (ja) * | 1980-12-10 | 1983-12-07 | 株式会社ミヤナガ | コアドリル |
US4452554A (en) * | 1981-09-21 | 1984-06-05 | Hougen Everett D | Annular hole cutter |
JPS59143616U (ja) * | 1983-03-14 | 1984-09-26 | 萬デザイン株式会社 | 環状カツタ− |
US5007777A (en) * | 1986-12-18 | 1991-04-16 | Noboru Itokazu | Hole saw |
CH676098A5 (en) * | 1988-11-02 | 1990-12-14 | Fraisa Ag | Hollow milling cutter with grooved body - has inner cylindrical surface on axis offset from cutter axis |
FR2640535B1 (fr) * | 1988-12-19 | 1994-07-08 | Aerospatiale | Outil a trepaner de precision pour des panneaux en materiau sandwich |
JP2933150B2 (ja) * | 1992-06-11 | 1999-08-09 | 株式会社 ミヤナガ | ホールカッターの刃先構造 |
JPH08118124A (ja) * | 1994-10-25 | 1996-05-14 | Citizen Watch Co Ltd | 電着工具 |
JP2001527469A (ja) * | 1997-06-17 | 2001-12-25 | ノートン カンパニー | 研磨工具の耐摩耗性を改良する方法 |
JPH1128609A (ja) * | 1997-07-04 | 1999-02-02 | Nok Corp | コアドリル |
US6786684B1 (en) * | 2001-08-15 | 2004-09-07 | Robert J. Ecker | Tubular hole cutter |
-
2009
- 2009-09-23 CN CN2009801218580A patent/CN102083597B/zh not_active Expired - Fee Related
- 2009-09-23 JP JP2010511008A patent/JP5431310B2/ja not_active Expired - Fee Related
- 2009-09-23 CA CA2719726A patent/CA2719726C/en not_active Expired - Fee Related
- 2009-09-23 WO PCT/JP2009/066462 patent/WO2011036739A1/ja active Application Filing
- 2009-09-23 DE DE112009005271T patent/DE112009005271T5/de not_active Withdrawn
- 2009-09-23 US US12/736,364 patent/US8753049B2/en not_active Expired - Fee Related
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB256153A (en) * | 1926-03-19 | 1926-08-05 | John Gell | Improvements in and relating to lathe & like tools |
US2556745A (en) * | 1946-10-08 | 1951-06-12 | Zimmermann Lukas | Cutting tool |
US4338050A (en) * | 1980-07-07 | 1982-07-06 | The Boeing Company | Method and tool for generating holes in composite materials |
JPS60228011A (ja) * | 1984-04-09 | 1985-11-13 | サントレード リミテツド | ワークピースに孔を明けるドリル |
JPH02237707A (ja) * | 1989-03-09 | 1990-09-20 | Mitsubishi Metal Corp | 穴明け工具 |
US6273652B1 (en) * | 1999-09-10 | 2001-08-14 | Woodworker's Supply | Plug cutter with radial relief and plug ejecting portion |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2011235407A (ja) * | 2010-05-11 | 2011-11-24 | Next I&D株式会社 | 穿孔装置 |
JP2013141708A (ja) * | 2012-01-06 | 2013-07-22 | Honda Motor Co Ltd | バリ取り工具 |
JP6835194B1 (ja) * | 2019-12-12 | 2021-02-24 | 株式会社タンガロイ | 穴あけ工具 |
JP2021091062A (ja) * | 2019-12-12 | 2021-06-17 | 株式会社タンガロイ | 穴あけ工具 |
Also Published As
Publication number | Publication date |
---|---|
JP5431310B2 (ja) | 2014-03-05 |
CA2719726C (en) | 2013-04-23 |
CN102083597A (zh) | 2011-06-01 |
CA2719726A1 (en) | 2011-03-23 |
JPWO2011036739A1 (ja) | 2013-02-14 |
US20120170990A1 (en) | 2012-07-05 |
CN102083597B (zh) | 2013-11-06 |
US8753049B2 (en) | 2014-06-17 |
DE112009005271T5 (de) | 2013-01-10 |
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