WO2012105545A1 - ドリル及びそれを用いた切削加工物の製造方法 - Google Patents
ドリル及びそれを用いた切削加工物の製造方法 Download PDFInfo
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- WO2012105545A1 WO2012105545A1 PCT/JP2012/052125 JP2012052125W WO2012105545A1 WO 2012105545 A1 WO2012105545 A1 WO 2012105545A1 JP 2012052125 W JP2012052125 W JP 2012052125W WO 2012105545 A1 WO2012105545 A1 WO 2012105545A1
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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
- B23B51/02—Twist drills
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2251/00—Details of tools for drilling machines
- B23B2251/40—Flutes, i.e. chip conveying grooves
- B23B2251/406—Flutes, i.e. chip conveying grooves of special form not otherwise provided for
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2251/00—Details of tools for drilling machines
- B23B2251/44—Margins, i.e. the narrow portion of the land which is not cut away to provide clearance on the circumferential surface
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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
- B23B51/011—Micro drills
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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
- Y10T408/03—Processes
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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
- Y10T408/909—Having peripherally spaced cutting edges
- Y10T408/9095—Having peripherally spaced cutting edges with axially extending relief channel
- Y10T408/9097—Spiral channel
Definitions
- the present invention relates to a drill and a method of manufacturing a cut product using the drill.
- the chips generated from the cutting edges tend to be clogged at the place where the two grooves join.
- the work location may be altered or the inner wall of the processed hole may be deformed (surface roughness may be deteriorated) due to heat generation at the joining point due to clogged chips.
- the stress (cutting torque) applied to the spot during processing increases, and the drill may be broken.
- the groove shape changes when the grooves meet at the joining point of the grooves, the flow of chips that have passed through the grooves may change at the joining point and roughen the inner wall of the processed hole.
- a drill includes a main body portion and a cylindrical cutting portion.
- the cutting portion includes two cutting blades that are spaced apart from each other at the front end portion, two grooves that are continuous with each of the two cutting blades and extend spirally toward the rear end portion, and the front end portion A clearance extending in a spiral shape from the side toward the rear end portion and recessed inward with respect to the outer periphery of the cutting portion in a cross-sectional view.
- the said cutting part has the 1st joining groove
- a drill according to another embodiment of the present invention includes a main body portion and a cylindrical cutting portion.
- the cutting portion includes two cutting blades that are positioned apart from each other at the front end portion, and two cutting blades that are continuous with each of the two cutting blades and that spirally extend toward the rear end portion and merge with each other.
- a groove Each of the two grooves has a depth D with respect to the outer periphery of the cutting portion as viewed from a cross-sectional view on the tip end side of the merging portion, and reaches the bottom as the distance from the one end increases. The depth D decreases from the bottom toward the other end.
- the said cutting part has the 1st confluence
- the manufacturing method of the cut material which concerns on one Embodiment of this invention WHEREIN The process of rotating the said drill around a rotating shaft, The process of making the said 2 cutting blades of the said rotating drill contact a work material And a step of relatively separating the work material and the drill.
- the first joining groove obtained by joining the groove and the clearance has a curved shape with the bottom surface protruding outward in a cross-sectional view. Since it is possible to reduce clogging of chips discharged through each groove at the joining portion while ensuring a large inscribed circle), it is possible to combine excellent hole workability and excellent breakage resistance.
- FIG. 1 It is a figure which shows the drill which concerns on embodiment of this invention, (a) is a whole side view, (b) is a side view which expands and shows a cutting part. It is a figure which shows the drill shown in FIG. 1, (a) is a side view which expands and shows a cutting part, (b) is a front view.
- 2A and 2B are cross-sectional views taken along line X1-X1, FIG. 2B is a cross-sectional view taken along line X2-X2, and FIG. 2C is a cross-sectional view taken along line X3-X3.
- D is a sectional view taken along line X4-X4.
- the drill 1 of the present embodiment includes a main body 20 that is gripped by a rotating shaft of a machine tool, and a cutting portion 10 provided on one end side of the main body 20.
- the main body 20 is a part designed according to the shape of the rotating shaft of the machine tool.
- the cutting unit 10 is a part that contacts the work material 30.
- the cutting part 10 is a part having a main role in the cutting of the work material 30, and is a columnar shape in the present embodiment. That is, in the cross section perpendicular to the rotation axis O, the cutting portion 10 has a relationship of T1 and T2 where T1 is a diameter at the tip portion 10a and T2 is a diameter at a portion other than the tip portion 10a. is doing. Further, the diameter of the cutting portion 10 is constant from the front end portion 10a to the rear end portion 10b in a cross section perpendicular to the rotation axis O.
- two cutting edges 11 are formed at the distal end portion 10 a of the cutting portion 10.
- the first cutting edge 11a and the second cutting edge 11b are positioned so as to be 180 ° rotationally symmetric with respect to the rotation axis O (axis) of the cutting unit 10. That is, the first cutting edge 11a and the second cutting edge 11b are two-fold symmetrical with respect to the rotation axis O. With such an arrangement, it is possible to improve the straight running stability when the work material 30 is processed.
- first step for discharging chips generated from the two cutting edges 11 corresponding to the two cutting edges 11.
- a first groove 12a and a second groove 12b) are spirally formed along the rotation axis O.
- the first groove 12a and the second groove 12b are continuous with the first cutting edge 11a and the second cutting edge 11b, respectively, and from the front end 10a to the rear end 10b (main body).
- Part 20 side) is located in a spiral shape.
- the “outer periphery” of the cutting part 10 means a part indicated by a dotted line in FIG. 2B and FIG.
- the chisel edge 11c (11c1, 11c2) is located on the most distal end 10a side of the cutting part 10 as shown in FIG. 2, and the first cutting edge 11a and the second cutting edge 11b. In addition, it has a role of cutting the work material 30.
- the chips generated by the first cutting edge 11a during the cutting process have the first groove 12a continuous to the first cutting edge 11a.
- the chips generated through the second cutting edge 11b through the second cutting edge 11b are discharged to the rear end 10b through the second groove 12b continuous with the second cutting edge 11a. That is, the chips generated by the respective cutting blades 11 are separately discharged to the rear end portion 10 b side through the corresponding grooves 12.
- generated by the chisel edge 11c2 continuous to the 2nd cutting edge 11b are the 2nd flank which is located corresponding to each. It is discharged to the rear end portion 10b side through the first groove 12a and the second groove 12b via 14b.
- the arrow a indicates the direction of rotation of the drill 1.
- the drill 1 of the present embodiment has an outer periphery of the cutting portion 10 in the tip portion 10a of the cutting portion 10 excluding the cutting edge 11 in the tip view or the sectional view.
- a clearance 17 is formed which is recessed inward with respect to the reference.
- “sectional view” refers to a cross section perpendicular to the rotation axis O.
- the clearance 17 has a curved or arc shape with the bottom surface protruding outward, and extends from the front end portion 10a to the region on the rear end portion 10b side.
- the clearance 17 has a role of reducing contact between the drill 1 and the inner wall of the machining hole 31 of the work material 30 and can contribute to improvement of chip dischargeability.
- the drill diameter corresponds to the size of the cutting part 10 before the clearance 17 is formed.
- the second joining groove 12d is configured.
- “at least partially merged” means that the two components / parts are not completely merged, and are within the range in which the main features / purposes of each can be achieved.
- the state of being integrated For example, the partial merging of the first groove 12a and the second groove 12b has an integrated part, but the groove wall surface located between the two maintains a sufficient height. A state in which chips discharged through the interior do not go back and forth.
- the distance C from the outer periphery of the bottom surface (17 a 1, 17 b 1) of the clearance 17 is larger on the rear end portion 10 b side than on the front end portion 10 a side in sectional view. It is preferable.
- the distance C is preferably the largest in the first joining groove 12c.
- the distance C may be changed stepwise for each predetermined section, or may be changed gradually and continuously. Further, the distance C may be set to be the smallest between the front end portion 10a side and the rear end portion 10b side.
- the first merge groove 12c is configured by the clearance 17, the first groove 12a, and the second groove 12b.
- the shape of the bottom surface 12c1 of the first merging groove 12c can be relatively easily curved outwardly or It can be arcuate. Further, in accordance with the change in the distance C of the clearance 17, it is preferable that the depth D from the outer periphery of the two grooves 12 in a sectional view is smaller on the rear end portion 10b side than on the front end portion 10a side.
- the width L1 of the clearance 17 in a sectional view can be made larger on the rear end portion 10b side than on the front end portion 10a side.
- the width of the clearance 17 does not mean the length of the bottom surfaces 17a1 and 17b1, but the length of the corresponding outer periphery as shown in FIG. That is, in this specification, “width” means the length of an arc-shaped line segment along the outer periphery (see FIG. 3A).
- variety of the 1st clearance 17a means the opening length of a corresponding outer periphery.
- the widths of the two may be determined using the normal line of the outer circumference corresponding to the junction.
- the width L1 of the clearance 17 in a cross-sectional view is preferably smaller than the width L2 of the two grooves 12 on the distal end portion 10a side than the first joining groove 12c.
- the width L2 of the two grooves 12 in a cross-sectional view is preferably smaller on the rear end 10b side than on the front end 10a side.
- the cutting part 10 has a margin 16 in an area where the clearance 17 and the groove 12 do not exist.
- the margin 16 is a portion corresponding to the outer periphery of the cutting portion 10 in a cross-sectional view and has an arc shape.
- the first margin 16a is provided between the first groove 12a and the first clearance 17a at the tip 10a, and the second groove 12b and the second clearance 17b.
- a second margin 16b is located between each. As shown in FIG. 3, the first margin 16a disappears and the width L3 of the second margin 16b increases toward the rear end 10b.
- the margin 16 of the present embodiment extends from the front end portion 10a side to the rear end portion 10b side, and the width L3b on the rear end portion 10b side is larger than the width L3a on the front end portion 10a side in a sectional view.
- the strength of 1 can be improved.
- the width L3 of the margin 16 is the region shown in FIG. 3A, and the width L3a on the front end portion 10a side and L3b on the rear end portion 10b side are relative to each other in the cutting portion 10. It is a concept that means a general positional relationship, and is not clearly distinguished on the basis of a predetermined position.
- a merge groove 12c is formed. Note that the groove 12 and the clearance 17 are independent from each other on the front end portion 10a side or are only partially joined, but constitute a first joining groove 12c at a predetermined location on the rear end portion 10b side. ing.
- “merging” means that two or more components / parts are integrated with each other even in a state where their main features / roles are not fulfilled independently.
- the integration progresses and the groove wall surface located between the two becomes lower, and the chips discharged through the inside of each groove go back and forth.
- a convex boundary portion 12f described later is less than 50% of the depth D from the outer periphery of the ridge groove 12, or the end portion of the first groove 12a and the end portion of the second groove 12b are formed.
- a case where the inner angle of the corner is an obtuse angle is mentioned.
- the two grooves 12 are separated from each other, but the two grooves 12 and the two clearances 17 partially merge to form two second merge grooves 12d (see FIG. 2 (b) and FIG. 3 (a)). That is, in this embodiment, as shown in FIG. 2B and FIG. 3A, the first groove 12a and the second clearance 17b partially merge at the tip portion 10a of the cutting portion 10, In addition, the second groove 12b and the first clearance 17a are partially joined to form a second joining groove 12d.
- the distance C1 from the outer periphery of the bottom surface of the clearance 17 is smaller than the depth D1 with respect to the outer periphery of the groove 12.
- FIG. 3B shows a state in which the end of the first groove 12a and the end of the second groove 12b are continuous as a result of the change in the distance between the two grooves 12 as described above.
- FIG. 3 is a cross-sectional view illustrating a boundary portion between a region B and a region C.
- both the twist angles of the two grooves 12 may be changed.
- the distance C2 from the outer periphery of the bottom surface of the clearance 17 becomes larger toward the rear end portion 10b side, and the depth D2 with respect to the outer periphery of the groove 12 is the rear end portion 10b. It gets smaller as you go to the side.
- FIG. 3C shows a state in which a convex boundary portion 12f exists between the first groove 12a and the second groove 12b, and a cross-section showing a boundary portion between the region C and the region D FIG.
- the convex boundary portion 12f preferably has a predetermined height with respect to a portion of the first groove 12a and the second groove 12b having the largest depth D with respect to the outer periphery. It is possible to smoothly discharge chips without interfering with the chips flowing in the first groove 12a and the second groove 12b.
- the distance C3 from the outer periphery of the bottom surface of the clearance 17 becomes larger toward the rear end portion 10b side, and the depth D3 based on the outer periphery of the groove 12 is the rear end portion. It becomes smaller as it goes to the 10b side.
- the third joining groove 12e where the two grooves 12 join together further joins with the clearance 17 to form the first joining groove 12c whose bottom surface 12c1 has a curved shape protruding outward in a sectional view. (See FIG. 3D).
- the distance C4 from the outer periphery of the bottom surface of the clearance 17 is larger than the depth D4 with reference to the outer periphery of the groove 12, and as a result, the bottom surface 12c1 in a cross-sectional view as the first joining groove 12c is outward. Convex curve.
- the first joining groove 12c configured by joining the groove 12 and the clearance 17 has a curved bottom surface 12c1 that is convex outward in a sectional view.
- (Circle diameter) While ensuring the size of W, it is possible to reduce the clogging of chips discharged through each groove 12 at the joining point, so it is possible to combine excellent hole workability and excellent fracture resistance It becomes. That is, it is possible to suppress the work material 30 from being altered or the inner wall of the processed hole 31 from being deformed (surface roughness is deteriorated) due to the heat generated in the part clogged with chips as in the prior art. Moreover, it can also suppress that a drill breaks, when the stress added to the site
- the “inscribed circle” refers to the largest circle that can be formed in the cutting portion 10 in a cross section perpendicular to the central axis O.
- the diameter W of the inscribed circle 15 corresponds to the cross-sectional core thickness of the drill that serves as an index for improving the rigidity of the drill. Therefore, the larger the diameter W, the higher the rigidity of the drill.
- the cutting portion 10 has a diameter W of the inscribed circle 15 in a cross section perpendicular to the rotation axis O, and the rear end portion 10 b from the front end portion 10 a side. It gets bigger as you go to the side. That is, the diameter Wa of the inscribed circle 15 positioned on the front end portion 10a side and the diameter Wb of the inscribed circle 15 positioned on the rear end portion 10b side have a relationship of Wa ⁇ Wb. Therefore, since the cross-sectional core thickness of the drill increases toward the rear end portion 10b, the drill can have high rigidity.
- the center of the inscribed circle 15 in the vicinity of the distal end portion 10a is at the same position as the rotation axis O, but does not necessarily match in other portions other than the vicinity of the distal end portion 10a. More specifically, in the present embodiment, as shown in FIG. 3, a relationship of W1 ⁇ W2 ⁇ W3 ⁇ 4 is provided.
- the work material 30 is a resin substrate having low heat resistance or a composite substrate using the resin substrate.
- the composite substrate include a printed circuit board in which a copper foil is laminated on a glass / epoxy material in which a glass fiber is impregnated with a resin such as epoxy.
- the resin is softened by accumulating in the holes 31 and the roughness of the inner surface of the processed hole 31 is increased (the inner wall roughness is deteriorated).
- the drill 1 of this embodiment since the above-described effects can be obtained, the inner wall roughness of the printed circuit board can also be reduced, so that it can be suitably used.
- the drill 1 having the configuration of the present embodiment is suitably used as a small-diameter drill or deep hole drill with an outer diameter of the cutting edge 11 of less than 0.6 mm, preferably less than 0.3 mm, and in particular, It is suitable for drilling a work material 30 or the like that is susceptible to thermal damage.
- the drill 1 according to the present embodiment is, for example, L / when the length of the axis (length from the cutting edge 11 to the end of the groove 12) is L and the diameter (outer diameter of the cutting edge 11) is D. It is suitably used for deep hole machining where D is 5 or more.
- the drill 1 includes a cylindrical cutting part 10 and a main body part 20.
- the cutting part 10 is continuous with each of the two cutting edges 11a and 11b and the two cutting edges 11a and 11b that are located apart from each other at the front end part 10a, and extends spirally to the rear end part 10b. It has two grooves 12a and 12b that merge. Further, each of the two grooves 12a and 12b has a depth from the outer periphery of the cutting portion 10 that increases in distance from the one end 12a1 and reaches the bottom 12a3 in the sectional view, and reaches the bottom 12a3, and the depth increases from the bottom 12a3 toward the other end 12a2. It is getting smaller.
- the cutting part has the 1st confluence
- the first embodiment and the first embodiment are formed by merging the two grooves 12a and 12b that are recessed inward with respect to the outer periphery without having the clearance 17 as in the first embodiment.
- the bottom surface 12c1 includes a first joining groove 12c that is convex outward.
- the said structure can be comprised by changing the shape of two groove
- a third groove (not shown) is formed from the front end portion 10a side to the rear end portion 10b side with respect to the first joining groove 12c, and the third groove is formed in the first groove 12a.
- the second groove 12b, or the third groove 12e is provided between the first groove 12a and the second groove 12b, so that there is no convex boundary 12f as described above. It is also possible to form a convex curve.
- the drill according to each embodiment having the above-described configuration is used by inserting the main body portion 20 positioned on the rear end portion 10b side of the cutting portion 10 into the drill holding portion of the machine tool.
- a machine tool is not particularly limited as long as it is normally used by those skilled in the art, and examples thereof include various machines such as a machining center.
- a drill attached to such a machine tool is first rotated in the direction of arrow a about the rotation axis O. Next, the rotating drill is fed toward the front side in the direction of the rotation axis O and is pressed against the work material 30, for example. Thereby, the processing hole 31 having a predetermined inner diameter can be formed in the work material 30. Details will be described later.
- the manufacturing method of the cut workpiece according to the present embodiment includes the following steps (i) to (iv).
- This step is performed, for example, by fixing the work material 30 on the table of the machine tool to which the drill 1 is attached and bringing the drill 1 closer in a rotated state.
- the work material 30 and the drill 1 may be relatively close to each other.
- the work material 30 may be close to the drill 1.
- the cutting conditions are set so that a part of the cutting portion 10 of the drill 1 on the rear end portion 10b side does not penetrate or contact the work material 30. It is preferable. That is, when the chips pass through the grooves 12 formed in the partial region, the contact with the work material 30 is suppressed, so that excellent chip discharging performance can be achieved.
- the work material 30 and the drill 1 may be relatively separated from each other.
- the work material 30 may be separated from the drill 1.
- the drill 1 can reduce clogging of chips that are discharged through each groove while securing the core thickness. Therefore, the drill 1 has excellent hole workability and excellent breakage resistance. It becomes possible to combine. Therefore, the work material 30 can be cut stably over a long period of time.
- the drill 1 when performing the cutting of the workpiece 30 as described above a plurality of times, for example, when forming a plurality of processed holes 31 for one workpiece 30, the drill 1 is rotated. What is necessary is just to repeat the process which makes the 1st cutting blade 11a and the 2nd cutting blade 11b of the drill 1 contact the different location of the workpiece 30, hold
- a high-quality processed hole 31 can be obtained even for the work material 30 having low heat resistance for the reason described above.
- the step (i) of preparing the work material 30 is such that a plurality of substrates having conductors made of copper or the like patterned on the surface are interposed between each of the intermediate layers containing a resin material. It is preferable to comprise a step of laminating and a step of softening the resin material by heating the intermediate layer.
- the intermediate layer it is preferable to use a material obtained by impregnating a glass cloth with a resin material from the viewpoint of reinforcing the substrate as the work material 30 and maintaining insulation between the substrates. Accordingly, for example, by pressing under a temperature condition of 200 ° C. or higher, the resin material of the intermediate layer can be softened, and the work material 30 can be formed by laminating the substrates having surface irregularities without gaps.
- tip has viscosity or melt
- the configuration includes the two grooves 12a and 12b and the two clearances 17a and 17b.
- the configuration includes the single clearance 17 for the two grooves 12a and 12b. It may be.
- the clearance 17 is formed at the tip portion 10a of the cutting portion 10 has been described. Instead, the clearance 17 extends from the middle of the cutting portion 10 to the rear end portion 10b side. You may make it the structure which forms.
- the inscribed circle has a diameter (core thickness) W that is the largest in the portion of the cutting portion 10 where the first joining groove 12c is formed. It is good also as a structure where the diameter of an inscribed circle becomes larger in the rear end part 10b side rather than the 1 junction groove 12c.
- the shape of the cutting part 10 should just be a shape normally used by those skilled in the art, and is not limited to the structure of the above-mentioned embodiment.
- the cutting part 10 may be tapered so that the core thickness W increases from the front end part 10a toward the rear end part 10b.
- the cutting part 10 may be inclined so that the drill diameter (outer diameter) becomes larger or smaller as it goes from the front end part 10a to the rear end part 10b.
- the cutting unit 10 may be provided with a so-called undercut region.
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Abstract
Description
(第1の実施形態)
以下、本発明に係るドリルの第1の実施形態について、図1~図3を参照して詳細に説明する。
次に、本発明の第2の実施形態に係るドリルについて説明する。なお、基本的な構成については、第1の実施形態に係るドリルと同様であるため、図1~図3を適宜参照しつつ説明する。
次に、本発明に係る切削加工物の製造方法の一実施形態について、上述の第1の実施形態に係るドリル1を用いる場合を例に挙げて詳細に説明する。
Claims (19)
- 本体部と円柱状の切削部とを備え、
前記切削部は、
先端部に互いに離れて位置している2つの切刃と、
前記2つの切刃のそれぞれに連続し、後端部へ向かってらせん状に延びる2つの溝と、
前記先端部側から前記後端部側へ向かってらせん状に延び、断面視において前記切削部の外周を基準にして内方に窪んでいるクリアランスと、を有し、
前記切削部は、前記2つの溝の少なくとも一方と前記クリアランスとが合流しており、断面視で底面が外方に凸の曲線状である第1合流溝を有している、ドリル。 - 断面視で、前記第1合流溝の前記底面は、外方に凸の円弧状である、請求項1に記載のドリル。
- 前記切削部は、前記第1合流溝よりも前記先端部側に、前記2つの溝の一方と前記クリアランスとが少なくとも部分的に合流している第2合流溝をさらに有している、請求項1または2に記載のドリル。
- 前記第1合流溝は、前記第2合流溝と前記2つの溝の他方とが合流した溝である、請求項3に記載のドリル。
- 前記切削部は、前記第1合流溝よりも前記先端部側に、前記2つの溝が互いに合流している第3合流溝をさらに有している、請求項1または2に記載のドリル。
- 前記第1合流溝は、前記第3合流溝と前記クリアランスとが合流した溝である、請求項5に記載のドリル。
- 断面視における前記クリアランスの底面の前記外周からの距離Cは、前記先端部側よりも前記後端部側で大きい、請求項1~6のいずれかに記載のドリル。
- 断面視における前記クリアランスの前記底面の前記外周からの距離Cは、前記第1合流溝の領域において最も大きい、請求項1~7のいずれかに記載のドリル。
- 断面視における前記2つの溝の前記外周を基準にした深さDは、前記先端部側よりも前記後端部側で小さい、請求項1~8のいずれかに記載のドリル。
- 断面視における前記後端部側で、前記クリアランスの前記底面の前記外周からの距離Cは、前記2つの溝の前記外周を基準にした深さDよりも大きい、請求項1~9のいずれかに記載のドリル。
- 断面視における前記クリアランスの幅L1は、前記先端部側よりも前記後端部側で大きい、請求項1~10のいずれかに記載のドリル。
- 断面視における前記クリアランスの幅L1は、前記第1合流溝よりも前記先端部側において、前記2つの溝のいずれの幅L2よりも小さい、請求項1~11のいずれかに記載のドリル。
- 断面視における前記2つの溝の幅L2は、前記先端部側よりも前記後端部側で小さい、請求項1~12のいずれかに記載のドリル。
- 前記切削部は、前記第1合流溝が位置している領域において最も芯厚Wが大きい、請求項1~13のいずれかに記載のドリル。
- 前記切削部は、断面視において前記外周に位置しているマージンをさらに有している、請求項1~14のいずれかに記載のドリル。
- 前記マージンは、前記先端部側から前記後端部側へ向かって延び、断面視において前記先端部側における幅L3aよりも前記後端部側における幅L3bが大きい、請求項15に記載のドリル。
- 本体部と円柱状の切削部とを備え、
前記切削部は、
先端部に互いに離れて位置している2つの切刃と、
前記2つの切刃のそれぞれに連続し、後端部へ向かってらせん状に延びて互いに合流している2つの溝と、を有し、
前記2つの溝はそれぞれ、前記合流している部位よりも前記先端部側では、断面視において、一端から離れるにつれて前記切削部の外周を基準にした深さDが大きくなって底部に達し、前記底部から他端に向かうにつれて前記深さDが小さくなっており、
前記切削部は、前記合流している部位よりも前記後端部側で、断面視において底面が外方に凸の曲線状である第1合流溝を有している、ドリル。 - 断面視で、前記第1合流溝の前記底面は、外方に凸の円弧状である、請求項17に記載のドリル。
- 請求項1~18のいずれかに記載のドリルを回転軸まわりに回転させる工程と、
回転している前記ドリルの前記2つの切刃を、被削材に接触させる工程と、
前記被削材と前記ドリルとを相対的に離隔させる工程と、
を備える、切削加工物の製造方法。
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US13/821,841 US20130170920A1 (en) | 2011-01-31 | 2012-01-31 | Drill and method of manufacturing machined product using the same |
CN201280002568.6A CN103097062B (zh) | 2011-01-31 | 2012-01-31 | 钻头及使用该钻头的切削加工物的制造方法 |
JP2012555888A JP5238912B2 (ja) | 2011-01-31 | 2012-01-31 | ドリル及びそれを用いた切削加工物の製造方法 |
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JP (1) | JP5238912B2 (ja) |
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TWI554348B (zh) * | 2014-04-16 | 2016-10-21 | 創國興業有限公司 | 鑽頭結構 |
DE102014108513A1 (de) * | 2014-06-17 | 2015-12-17 | Franz Haimer Maschinenbau Kg | Rotationsschneidwerkzeug |
WO2017038867A1 (ja) | 2015-09-02 | 2017-03-09 | 三菱瓦斯化学株式会社 | ドリル孔あけ用エントリーシート、及びそれを用いたドリル孔あけ加工方法 |
CN106493413A (zh) * | 2015-09-08 | 2017-03-15 | 创国兴业有限公司 | 钻头结构 |
TWM513078U (zh) * | 2015-09-08 | 2015-12-01 | Tct Global Ltd | 鑽頭結構 |
JP6860856B2 (ja) * | 2015-11-26 | 2021-04-21 | 三菱瓦斯化学株式会社 | 繊維強化複合材の切削加工方法 |
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RU2018115306A (ru) | 2016-02-17 | 2020-03-17 | Мицубиси Гэс Кемикал Компани, Инк. | Способ обработки резанием и способ изготовления обработанного резанием изделия |
WO2018088267A1 (ja) | 2016-11-14 | 2018-05-17 | 三菱瓦斯化学株式会社 | 構成刃先形成用部材及び構成刃先形成方法 |
WO2018216756A1 (ja) | 2017-05-25 | 2018-11-29 | 三菱瓦斯化学株式会社 | 切削加工補助潤滑材、切削加工補助潤滑シート、及び切削加工方法 |
US11872641B2 (en) * | 2017-05-29 | 2024-01-16 | Kyocera Corporation | Drill and method for manufacturing machined product |
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JPWO2012105545A1 (ja) | 2014-07-03 |
US20130170920A1 (en) | 2013-07-04 |
CN103097062A (zh) | 2013-05-08 |
JP5238912B2 (ja) | 2013-07-17 |
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