WO2023181814A1 - ドリル及び切削加工物の製造方法 - Google Patents

ドリル及び切削加工物の製造方法 Download PDF

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Publication number
WO2023181814A1
WO2023181814A1 PCT/JP2023/007565 JP2023007565W WO2023181814A1 WO 2023181814 A1 WO2023181814 A1 WO 2023181814A1 JP 2023007565 W JP2023007565 W JP 2023007565W WO 2023181814 A1 WO2023181814 A1 WO 2023181814A1
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WO
WIPO (PCT)
Prior art keywords
honing surface
region
tip
drill
honing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2023/007565
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English (en)
French (fr)
Japanese (ja)
Inventor
雅彦 黒田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kyocera Corp
Original Assignee
Kyocera Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kyocera Corp filed Critical Kyocera Corp
Priority to JP2024509894A priority Critical patent/JP7727830B2/ja
Priority to DE112023001553.8T priority patent/DE112023001553T5/de
Priority to US18/848,515 priority patent/US20250214155A1/en
Priority to CN202380028381.1A priority patent/CN118891122A/zh
Publication of WO2023181814A1 publication Critical patent/WO2023181814A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • B23B2251/08—Side or plan views of cutting edges
    • B23B2251/082—Curved cutting edges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2251/00—Details of tools for drilling machines
    • B23B2251/18—Configuration of the drill point
    • B23B2251/182—Web thinning
    • 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
    • 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
    • B23B2251/443—Double margin drills

Definitions

  • This embodiment relates to a method for manufacturing a drill and a cut workpiece.
  • the drills described in Patent Documents 1 and 2 are known as drills used when performing milling on a workpiece.
  • the drills described in Patent Documents 1 and 2 by chamfering or honing the boundary between the flank and the groove located on the tip side of the drill, stress concentration that occurs during cutting can be avoided. It is possible to obtain effects such as improving the chip evacuation performance of the drill.
  • the drill described in Patent Document 1 has a curved portion formed on the flank surface, which has the great advantage of reducing the load on the drill tip during drilling. Further, in the drill described in Patent Document 2, it is disclosed that the heel portion located on the tip side of the drill is rounded with an R surface to further improve chip evacuation performance.
  • a drill has a rod-shaped main body that extends from the tip toward the rear end along the rotation axis.
  • the main body includes a cutting blade located on the tip side, a thinning groove extending from the cutting blade toward the rear end, and a discharge groove located on the outer peripheral side of the thinning groove and extending from the cutting blade toward the rear end.
  • a first honing surface located at the intersection of the tip surface and the thinning groove; a first honing surface located at the intersection of the tip surface and the discharge groove; a second honing surface connected to the first honing surface.
  • the first honing surface is connected to the second honing surface, and has a first portion that increases in width as viewed from the tip as it approaches the second honing surface.
  • the second honing surface is connected to the first honing surface, and has a second portion whose width in a distal view increases as it approaches the first honing surface.
  • FIG. 2 is an enlarged view of area A1 shown in FIG. 1.
  • FIG. 3 is a plan view of the drill shown in FIG. 2 when viewed from direction B1.
  • FIG. 3 is a plan view of the drill shown in FIG. 2 when viewed from direction B2.
  • 5 is an enlarged view of area A2 shown in FIG. 4.
  • FIG. 5 is an enlarged view of area A2 shown in FIG. 4.
  • FIG. It is a schematic diagram showing one process of a manufacturing method of a cut workpiece concerning one embodiment. It is a schematic diagram showing one process of a manufacturing method of a cut workpiece concerning one embodiment. It is a schematic diagram showing one process of a manufacturing method of a cut workpiece concerning one embodiment. It is a schematic diagram showing one process of a manufacturing method of a cut workpiece concerning one embodiment.
  • the drill of the embodiment will be described in detail using the drawings. Further, in each of the figures referred to below, only the main members constituting the embodiment are shown in a simplified manner for convenience of explanation. Accordingly, the drill may include any components not shown in the figures to which this specification refers. Furthermore, the dimensions of the members in each figure do not faithfully represent the dimensions of the actual constituent members and the dimensional ratios of each member.
  • the drill 1 according to the embodiment of the present disclosure, as shown in the example shown in FIG. 1, has a substantially cylindrical main body 3 extending from the tip 3A toward the rear end 3B along the rotation axis O1.
  • the main body 3 can perform drilling while rotating in a rotational direction O2 about a rotation axis O1.
  • the main body 3 has a cutting part 5 located on the side of the tip 3A, and a shank part 7 located on the side of the rear end 3B with respect to the cutting part 5.
  • a cutting part 5 located on the side of the tip 3A
  • a shank part 7 located on the side of the rear end 3B with respect to the cutting part 5.
  • the main body of the drill of this embodiment is approximately cylindrical
  • the cutting portion and the shank portion are also approximately cylindrical.
  • the cutting part 5 includes a part that comes into contact with the workpiece, and this part plays a main role in cutting the workpiece.
  • the shank portion 7 is a portion that is gripped by a rotating spindle or the like in a machine tool, and may be designed according to the shape of the spindle.
  • the cutting part 5 and the shank part 7 may be constructed as separate members, or may be constructed integrally.
  • a drill 1 in which the cutting part 5 and the shank part 7 are formed as separate members is called a tip-exchangeable type, and a drill 1 in which the cutting part 5 and the shank part 7 are formed integrally is called a solid type.
  • the cutting part 5 has a cutting edge 9, a thinning groove 11, a discharge groove 15, a tip surface 17, and an outer peripheral surface 19.
  • the cutting edge 9 is located on the side of the tip 3A of the main body 3, as shown in FIGS. 2 and 3. Generally, the cutting edge 9 is called a tip edge, so in the following description, the cutting edge 9 may be referred to as a tip edge.
  • FIG. 3 is a plan view of the drill 1 viewed from a direction perpendicular to the rotation axis O1, and may also be referred to as a side view.
  • the thinning groove 11 and the discharge groove 15 are grooves extending from the cutting edge 9 toward the rear end 3B.
  • the distal end surface 17 is a surface located on the distal end 3A side and facing the distal end 3A side.
  • the outer peripheral surface 19 is a surface located on the outer peripheral side of the cutting part 5.
  • the number of thinning grooves 11, discharge grooves 15, tip surfaces 17, and outer circumferential surfaces 19 may correspond to the number of cutting edges 9.
  • the number of cutting edges 9 is two, and the number of thinning grooves 11, discharge grooves 15, tip surfaces 17, and outer circumferential surfaces 19 are also two.
  • the cutting edge 9 has a main cutting edge 21 extending from the rotation axis O1 side toward the outer circumferential surface 19 side.
  • the end of the main cutting edge 21 on the rotation axis O1 side is located closer to the tip 3A than the end of the main cutting edge 21 on the outer peripheral surface 19 side.
  • the main cutting edge 21 refers to a portion of the cutting edge 9 that is located on the ridge line where the tip surface 17 and the discharge groove 15 intersect, and has a positive rake angle.
  • the tip surface 17 functions as a flank surface
  • the discharge groove 15 functions as a rake surface.
  • FIG. 4 is a plan view of the drill 1 viewed from the tip 3A side along the rotation axis O1, and may be referred to as a front view or a tip view.
  • the cutting blade 9 when the main body 3 is viewed from the tip, the cutting blade 9 includes a chisel blade 23 including the rotation axis O1, and a thinning blade extending from the chisel blade 23 toward the outer circumferential surface 19 of the main body 3. It has 25.
  • the thinning blade 25 refers to a portion of the cutting blade 9 located on the ridgeline where the tip surface 17 and the thinning groove 11 intersect, and where the rake angle is a negative value. In the example shown in FIG. 4, the thinning blade 25 is located closer to the rotation axis O1 than the main cutting edge 21, and is connected to the main cutting edge 21. When viewed from the tip, the chisel blade 23, thinning blade 25, and main cutting blade 21 of the cutting blade 9 are lined up in this order from the rotation axis O1 toward the outer periphery.
  • the chisel blade 23 refers to the part of the cutting edge 9 that is located on the ridge line where the plurality of tip surfaces 17 intersect when the cutting portion 5 has a plurality of tip surfaces 17, and functions as a pseudo cutting edge. do.
  • the chisel blade 23 in the example shown in FIG. 4 intersects the rotation axis O1 and is connected to the thinning blade 25.
  • the cutting part 5 has a plurality of cutting edges 9, one of the plurality of cutting edges 9 is the first cutting edge 9A, and is located in front of the first cutting edge 9A in the rotation direction O2.
  • the cutting edge 9 that is attached is referred to as a second cutting edge 9B.
  • the first cutting edge 9A and the second cutting edge 9B each have a main cutting edge 21, a chisel blade 23, and a thinning blade 25.
  • the second cutting edge 9B is located in front of the first cutting edge 9A in the rotation direction O2 via the thinning groove 11 (or the discharge groove 15) and the tip surface 17.
  • the cutting edge 9 is located in front of the first cutting edge 9A in the rotational direction O2, and is closest to the first cutting edge 9A in the front in the rotational direction O2.
  • the blade 9 is defined as a second cutting edge 9B.
  • the thinning groove 11 is a groove located on the side of the tip 3A of the cutting part 5.
  • the thinning groove 11 is provided to reduce the core thickness of the cutting portion 5 on the tip 3A side. Therefore, the surface located on the rear side in the rotational direction O2 is inclined toward the front in the rotational direction O2 as it goes toward the rear end 3B.
  • the thinning groove 11 may be formed by grinding with a grindstone or the like.
  • the cutting portion 5 has a plurality of thinning grooves 11 separated from each other via the distal end surface 17 when viewed from the distal end.
  • the cutting part 5 has a plurality of thinning grooves 11, among the plurality of thinning grooves 11, the one extending from the first cutting edge 9A toward the rear end 3B side is referred to as the first thinning groove 11A. Furthermore, among the plurality of thinning grooves 11, those extending from the second cutting edge 9B toward the rear end 3B are referred to as second thinning grooves 11B.
  • the second thinning groove 11B is located in front of the first thinning groove 11A in the rotation direction O2.
  • the thinning groove 11 may have a thinning surface 13 located on the front side in the rotation direction O2.
  • the shape of the thinning surface 13 is not particularly limited, but may be a planar shape.
  • the cutting part 5 may have a plurality of thinning surfaces 13.
  • the first thinning groove 11A has a first thinning surface 13A
  • the second thinning groove 11B has a second thinning surface 13B.
  • the discharge groove 15 is generally called a flute and is located on the outer circumferential side of the thinning groove 11.
  • the discharge groove 15 is provided to discharge chips toward the rear end 3B. Therefore, the surface located on the rear side in the rotational direction O2 is generally inclined toward the rear in the rotational direction O2 as it goes toward the rear end 3B. Furthermore, the discharge groove 15 extends further toward the rear end 3B than the thinning groove 11.
  • the thinning groove 11 and the discharge groove 15 are open and connected to each other. Further, in the example shown in FIG. 1, the discharge groove 15 extends from the cutting blade 9 toward the rear end 3B in a twisted manner around the rotation axis O1, but may extend straight.
  • "extending in a twisted manner” means that the discharge groove 15 extends in a generally twisted manner from the cutting blade 9 toward the rear end 3B. As shown in FIG. 1, the discharge groove 15 may extend in a spiral shape. The discharge groove 15 may have a partially untwisted portion. When the discharge groove 15 extends in a twisted manner, the twist angle of the discharge groove 15 is not limited to a specific value, and may be set to about 10° to 35°, for example.
  • the cutting part 5 has a plurality of discharge grooves 15 separated from each other via the tip surface 17.
  • the one extending from the first cutting edge 9A toward the rear end 3B side is defined as the first discharge groove 15A
  • the one extending from the second cutting edge 9B toward the rear end 3B side is defined as the first discharge groove 15A.
  • the elongated portion is referred to as a second discharge groove 15B.
  • the second discharge groove 15B is located in front of the first discharge groove 15A in the rotational direction O2.
  • the tip surface 17 may have a plurality of inclined planes or may have a curved shape. Further, the distal end surface 17 may have an opening 27 through which coolant is discharged. In this case, the coolant is discharged from the opening 27 through the channel inside the main body 3.
  • a thinning groove 11 and a discharge groove 15 are located between the plurality of tip surfaces 17.
  • one of the plurality of tip surfaces 17 is referred to as the first tip surface 17A
  • the tip surface 17 located in front of the first tip surface 17A in the rotational direction O2 is referred to as the second tip surface. It shall be 17B.
  • the first tip surface 17A is adjacent to the first thinning groove 11A and the first discharge groove 15A in the front direction in the rotation direction O2. Specifically, as shown in FIG. 4, when viewed from the tip, the first tip surface 17A is located forward of these grooves in the rotational direction O2, and the first tip surface 17A is disposed between these grooves. are in contact with each other. Further, the first tip surface 17A may be connected to the second cutting edge 9B at the rear in the rotation direction O2. Since the first tip surface 17A is a surface extending from the second cutting edge 9B toward the first thinning groove 11A and the first discharge groove 15A, it may also be referred to as a flank surface with respect to the second cutting edge 9B.
  • the outer circumferential surface 19 is a surface area located at the outer edge of the cutting part 5.
  • the outer peripheral surface 19 may have a margin or a clearance.
  • the cutting portion 5 has a plurality of outer circumferential surfaces 19 separated from each other via the discharge grooves 15.
  • one of the plurality of outer circumferential surfaces 19 is a first outer circumferential surface 19A, and an outer circumferential surface located in front of the first outer circumferential surface 19A in the rotation direction O2. 19 is the second outer peripheral surface 19B.
  • each outer circumferential surface 19 is 180° rotationally symmetrical about the rotation axis O1. The above relationship holds true even when the first outer circumferential surface 19A is replaced with the first cutting edge 9A, the first thinning groove 11A, the first discharge groove 15A, or the first tip surface 17A.
  • the cutting part 5 has a first honing surface 29 located at the intersection of the first tip surface 17A and the first thinning groove 11A. Moreover, the cutting part 5 has a second honing surface 31 located at the intersection of the first tip surface 17A and the first discharge groove 15A. As shown in FIG. 4, when viewed from the tip, the first honing surface 29 and the second honing surface 31 each extend from the rotation axis O1 side toward the outer peripheral side of the main body 3.
  • first honing surface 29 is connected to the second honing surface 31.
  • the portion where the first honing surface 29 and the second honing surface 31 connect is referred to as a first connection portion P1.
  • the first honing surface 29 and the second honing surface 31 form a band of honing surfaces.
  • the second honing surface 31 may be connected to the first outer peripheral surface 19A.
  • the first honing surface 29 has a first portion 33.
  • the first portion 33 is a portion located on the outer peripheral side of the first honing surface 29, and is connected to the second honing surface 31 at the first connection portion P1.
  • the width of the first portion 33 increases as it approaches the second honing surface 31.
  • the width of the first portion 33 refers to the end point T1 of the first honing surface 29 on the rotation axis O1 side and the end point on the outer circumferential side of the second honing surface 31 when viewed from the tip. It refers to the width W1 in the direction perpendicular to the virtual straight line N passing through T2.
  • the width W1 of the first portion 33 may be 5 ⁇ m to 30 ⁇ m. Further, the amount of change in the width W1 of the first portion 33 may be 3 ⁇ m to 25 ⁇ m.
  • the widths (W2 to W5, WP1, WP2), which will be described later, are also specified using the above method.
  • the midpoint of the width is defined as the outer peripheral end point T2 of the second honing surface 31.
  • the expression that the width of the first portion 33 increases as it approaches the second honing surface 31 does not necessarily mean that the width of the first portion 33 increases continuously; There may be.
  • other parts (second part 35 to fifth part 51) to be described later approach a certain part, in other words, even if they increase in a certain direction, the width of each part does not necessarily increase continuously. It is not necessary, and some portions may have a constant width.
  • the second honing surface 31 has a second portion 35. As shown in FIG. 5, the second portion 35 is a portion located on the rotation axis O1 side of the second honing surface 31, and is connected to the first honing surface 29 at the first connection portion P1. Connected. The second portion 35 is connected to the first portion 33 at the first connection portion P1.
  • the width of the second portion 35 in the distal view increases as it approaches the first honing surface 29.
  • the width W2 of the second portion 35 shown in FIG. 5 may be 3 ⁇ m to 30 ⁇ m. Further, the amount of change in the width W2 of the second portion 35 may be 2 ⁇ m to 25 ⁇ m.
  • Chips generated during cutting may collide with the boundary between the flank surface and the thinning groove, as well as the boundary between the flank surface and the discharge groove 15, resulting in damage to these boundary areas.
  • the boundary portion has an angular shape, so the strength of the boundary portion tends to decrease.
  • a protruding shape such as a pointed shape or a convexly curved shape, so that chipping is likely to occur due to chip collision.
  • One way to solve the above problem is to provide a honing surface on the flank. This makes it possible to avoid damage to the boundary portion due to collision with chips, and to extend the life of the tool.
  • the honing surface is provided excessively with respect to the flank surface, the thickness of the main body will be reduced, which may reduce the rigidity of the drill. That is, if the honing surface is provided excessively, the life of the tool may be shortened. Furthermore, in the above case, there is a possibility that the chips that collide with the honing surface will flow to the side of the flank instead of the groove, and there is also a possibility that the chip evacuation performance of the drill will be deteriorated.
  • the width of the first portion 33 on the first honing surface 29 increases as it approaches the second honing surface 31, and the width of the second portion 35 on the second honing surface 31 increases as the width of the first portion 33 on the first honing surface 29 increases. It becomes larger as it approaches the surface 29.
  • the width of the honing surface can be relatively increased at the portion where the first tip surface 17A, the first thinning groove 11A, and the first discharge groove 15A intersect. This reduces defects in areas where chips are likely to collide.
  • the thickness of the main body 3 is ensured, making it easier to maintain the rigidity of the drill 1, and at the same time providing excellent performance in terms of chip evacuation.
  • the drill of this embodiment is a drill that achieves a reduction in the occurrence of fractures due to collision with chips, maintains the rigidity of the main body, and achieves good chip evacuation.
  • the first portion 33 When viewed from the tip, the first portion 33 extends toward the rear in the rotation direction O2 of the rotation axis O1 as it goes toward the second honing surface 31, and the second portion 35 extends as it goes toward the first honing surface 29. It may extend toward the rear in the rotation direction O2 of the rotation axis O1.
  • a band of honing surfaces consisting of the first honing surface 29 and the second honing surface 31 has a convex shape that protrudes rearward in the rotation direction O2 with the first connection portion P1 as the apex. .
  • the vicinity of the intersection of the first tip surface 17A, the first thinning groove 11A, and the first discharge groove 15A becomes more protruding, so by providing the first portion 33 and the second portion 35, Reduce the occurrence of defects.
  • the entire first honing surface 29 may be the first portion 33.
  • the width of the first honing surface 29 increases as it approaches the second honing surface 31.
  • the width of the honing surface on the outer peripheral side may be larger than the width of the honing surface on the rotation axis O1 side.
  • the drill 1 has the above configuration, the risk of breakage of the drill 1 due to collision with chips can be reduced while ensuring high rigidity and good chip evacuation performance of the drill 1.
  • the second honing surface 31 may have a first region 37 and a second region 39 located on the outer peripheral side of the first region 37.
  • the first region 37 may have a concave shape concave toward the front in the rotation direction O2 when viewed from the tip.
  • the second region 39 may extend toward the front in the rotation direction O2 toward the outer circumference when viewed from the tip.
  • the first region 37 may be connected to the second region 39, and the connecting portion in this case is referred to as a second connecting portion P2.
  • Chips generated during cutting may collide with the first region 37 when flowing from the first thinning groove 11A to the first discharge groove 15A.
  • the first region 37 does not have a concave shape, collisions of chips tend to concentrate near the end of the first region 37 on the rotation axis O1 side.
  • the first region 37 has a concave shape, it is possible to disperse the risk of chip collision to the outer peripheral side of the first region 37.
  • the width of the first discharge groove 15A increases, so that the chip discharge performance becomes even better.
  • the first region 37 may have a third portion 41 whose width increases as it approaches the outer circumferential surface 19.
  • the third portion 41 may be connected to the second region 39 at the second connection portion P2, or may be connected to the second portion 35. In such a case, the risk of breakage due to chip collision can be reduced while ensuring high rigidity and good chip evacuation of the drill 1.
  • the width W3 of the third portion 41 shown in FIG. 5 may be 5 ⁇ m to 50 ⁇ m. Further, the amount of change in the width W3 of the third portion 41 may be 3 ⁇ m to 45 ⁇ m.
  • the third portion 41 may include the bottom 43 of the first region 37.
  • the bottom portion 43 refers to a portion of the first region 37 where the boundary between the first discharge groove 15A and the first region 37 is recessed most forward in the rotation direction O2; may be said to be located at the front end in the rotational direction O2.
  • the region located on the outer peripheral side of the bottom portion 43 is defined as an outer region 45, and the region located inside the outer region 45 as an inner region 47.
  • the outer region 45 when viewed from the tip, the outer region 45 faces the first thinning groove 11A, so chips flowing from the first thinning groove 11A are directed to the outer region than the inner region 47. It is easy to collide with 45. Therefore, when the main body 3 has the above-mentioned configuration, the outer region 45 is honed to have a relatively wide width, so that damage due to chip collision is less likely to occur.
  • the second region 39 may have a fourth portion 49 whose width increases as it approaches the first region 37.
  • the fourth portion 49 may be connected to the first region 37 at the second connection portion P2.
  • the fourth portion 49 is a portion located on the front side in the rotational direction O2 in the second region 39, that is, a protruding portion, so there is a high risk of breakage of the drill 1 due to collision with chips. . Therefore, when the second region 39 has the above configuration, such risks can be reduced.
  • the width W4 of the fourth portion 49 shown in FIG. 5 may be 10 ⁇ m to 100 ⁇ m. Further, the amount of change in the width W4 of the fourth portion 49 may be 2 ⁇ m to 80 ⁇ m.
  • the second region 39 may have a fifth portion 51 whose width increases as it approaches the outer peripheral surface 19.
  • the fifth portion 51 may be connected to the first outer peripheral surface 19A or may be connected to the fourth portion 49. In such a case, the risk of breakage of the drill 1 due to collision with chips can be reduced while ensuring high rigidity of the drill 1 and good chip evacuation performance.
  • the width W5 of the fifth portion 51 shown in FIG. 5 may be 15 ⁇ m to 150 ⁇ m. Further, the amount of change in the width W5 of the fifth portion 51 may be 5 ⁇ m to 120 ⁇ m.
  • the width WP1 of the first connection portion P1 may be smaller than the width WP2 of the second connection portion P2. In this case, excessive honing in the vicinity of the first connection part P1 can be reduced, and the thickness of the main body 3 in the vicinity of the first connection part P1 can be ensured. Further, when viewed from the tip, the first connecting portion P1 may be located further forward in the rotational direction O2 than the second connecting portion P2.
  • the first region 37 may have the minimum portion S, where the portion of the second honing surface 31 where the width is the minimum is defined as the minimum portion S.
  • the minimum value of the width W1 of the first region 37 may be the width WS of the minimum portion S.
  • L2/ L1 ⁇ 5 may be satisfied.
  • the relationship between the distance L1 from the first connection portion P1 to the minimum portion S and the distance L2 from the minimum portion S to the second connection portion P2 in the direction along the virtual straight line N is may be L2/L1 ⁇ 5.
  • the width of the honing surface from the minimum portion S to the outer circumferential side gradually increases, so that damage due to chip collision is less likely to occur on the outer circumferential side of the main body 3.
  • the first thinning groove 11A may have a first thinning surface 13A connected to the first portion 33. Further, the length of the first honing surface 29 may be longer than the length of the boundary between the first tip surface 17A and the first thinning surface 13A. Specifically, as shown in FIG. 6, in the direction along the virtual straight line N, the length L3 of the first honing surface 29 is equal to the length L4 of the boundary between the first tip surface 17A and the first thinning surface 13A. In this case, L3>L4 may be satisfied. In such a case, it is possible to reduce the risk of breakage due to chip collision in a portion located near the rotation axis O1.
  • the distance from the rotation axis O1 to the end of the first honing surface 29 on the rotation axis O1 side may be smaller than one third of the outer diameter of the main body 3.
  • the relationship between the distance L5 from the rotation axis O1 shown in FIG. 4 to the end point T1 on the rotation axis O1 side of the first honing surface 29 and the outer diameter D of the main body 3 is such that L5>D/3. It's okay. In such a case, it is possible to reduce the risk of breakage due to chip collision in a portion located near the rotation axis O1.
  • the first honing surface 29 may be longer than the second honing surface 31.
  • the first discharge groove 15A also becomes relatively wide.
  • chip evacuation becomes even better.
  • the first region 37 may be longer than the second region 39, and the first region 33 may be longer than the other regions.
  • the third portion 41 may be longer than the second portion 35, and the fifth portion 51 may be longer than the fourth portion 49.
  • the length of the first honing surface 29 in the direction along the virtual straight line N may be 0.05D to 0.2D.
  • the length of the second honing surface 31 may be 0.2D to 0.4D.
  • the length of the first region 37 may be 0.2D to 0.38D.
  • the length of the second region 39 may be 0.02D to 0.2D.
  • the length of the first portion 33 may be 0.05D to 0.2D.
  • the length of the second portion 35 may be 0.01D to 0.1D.
  • the length of the third portion 41 may be 0.15D to 0.38D.
  • the length of the fourth portion 49 may be 0.02D to 0.2D.
  • the length of the fifth portion 51 may be 0.01D to 0.1D.
  • the main body 3 may have a honing surface having the same configuration as the first honing surface 29 or the second honing surface 31.
  • a honing surface having the same configuration as the first honing surface 29 or the second honing surface 31 may be provided at the boundary between the second tip surface 17B and the second thinning groove 11B.
  • the boundary between the second tip surface 17B and the second discharge groove 15B and the boundary between the second tip surface 17B and the second outer peripheral surface 19B have the same configuration as the first honing surface 29 or the second honing surface 31, respectively.
  • a honing surface may be provided having a.
  • Examples of the material of the main body 3 include cemented carbide or cermet.
  • Examples of the composition of the cemented carbide include WC-Co, WC-TiC-Co, and WC-TiC-TaC-Co.
  • WC, TiC, and TaC are hard particles
  • Co is a binder phase.
  • cermet is a sintered composite material in which a metal is combined with a ceramic component.
  • examples of the cermet include titanium compounds containing titanium carbide (TiC) or titanium nitride (TiN) as a main component.
  • the surface of the body 3 may be coated with a film using a chemical vapor deposition (CVD) method or a physical vapor deposition (PVD) method.
  • CVD chemical vapor deposition
  • PVD physical vapor deposition
  • the composition of the film include titanium carbide (TiC), titanium nitride (TiN), titanium carbonitride (TiCN), and alumina (Al 2 O 3 ).
  • a method for manufacturing a cut workpiece in an embodiment of the present disclosure includes: (1) a step of rotating the drill 1 around the rotation axis O1; (2) a step of bringing the cutting edge 9 of the rotating drill 1 into contact with the workpiece 100; (3) The step of separating the drill 1 from the workpiece 100 is provided.
  • the drill 1 is rotated around the rotation axis O1 and moved in the direction along the rotation axis O1 (Y1 direction), thereby moving the drill 1 into the workpiece. Make it relatively close to 100.
  • the cutting blade 9 of the drill 1 is brought into contact with the workpiece 100 to cut the workpiece 100. Then, as shown in FIG. 9, by moving the drill 1 in the Y2 direction, the drill 1 is moved relatively away from the workpiece 100.
  • the drill 1 is brought close to the workpiece 100 while the workpiece 100 is fixed and the drill 1 is rotated around the rotation axis O1. Moreover, in FIG. 8, the workpiece 100 is cut by bringing the cutting blade 9 of the rotating drill 1 into contact with the workpiece 100. Further, in FIG. 9, the drill 1 is rotated and moved away from the workpiece 100.
  • the drill 1 in each step, by moving the drill 1, the drill 1 is brought into contact with the work material 100, or by separating the drill 1 from the work material 100.
  • the drill 1 is brought into contact with the work material 100, or by separating the drill 1 from the work material 100.
  • the drill 1 is brought into contact with the work material 100, or by separating the drill 1 from the work material 100.
  • the workpiece 100 may be brought closer to the drill 1. Further, in the step (3), the workpiece 100 may be moved away from the drill 1. When continuing the cutting process, it is sufficient to keep the drill 1 in a rotated state and repeat the process of bringing the cutting edge 9 of the drill 1 into contact with different locations on the workpiece 100.
  • Typical examples of the material of the workpiece 100 include aluminum, carbon steel, alloy steel, stainless steel, cast iron, and non-ferrous metals.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Drilling Tools (AREA)
PCT/JP2023/007565 2022-03-24 2023-03-01 ドリル及び切削加工物の製造方法 Ceased WO2023181814A1 (ja)

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JP2024509894A JP7727830B2 (ja) 2022-03-24 2023-03-01 ドリル及び切削加工物の製造方法
DE112023001553.8T DE112023001553T5 (de) 2022-03-24 2023-03-01 Bohrer und verfahren zur herstellung eines maschinell bearbeiteten produkts
US18/848,515 US20250214155A1 (en) 2022-03-24 2023-03-01 Drill and method of manufacturing machined product
CN202380028381.1A CN118891122A (zh) 2022-03-24 2023-03-01 钻头及切削加工物的制造方法

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JP2022048639 2022-03-24

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JP (1) JP7727830B2 (https=)
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7740817B1 (ja) * 2024-11-15 2025-09-17 住友電工ハードメタル株式会社 ドリル

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5414089A (en) * 1977-07-05 1979-02-01 Caterpillar Mitsubishi Ltd Drill with chip breaker for high hardness
JPS63237809A (ja) * 1987-03-25 1988-10-04 Mitsubishi Metal Corp ドリル
JP2002301612A (ja) * 2001-04-02 2002-10-15 Toshiba Tungaloy Co Ltd ドリル
JP2019209439A (ja) * 2018-06-06 2019-12-12 株式会社タンガロイ ドリル
WO2020054702A1 (ja) * 2018-09-12 2020-03-19 京セラ株式会社 切削インサート、回転工具及び切削加工物の製造方法
JP2021088007A (ja) * 2019-12-02 2021-06-10 三菱マテリアル株式会社 ドリル

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0340499A (ja) 1989-07-07 1991-02-21 Matsushita Electric Ind Co Ltd 電子部品装着装置
DE19955172A1 (de) 1999-11-16 2001-05-23 Kennametal Inc Verfahren zum Schleifen einer Bohrspitze und Bohrerspitze

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5414089A (en) * 1977-07-05 1979-02-01 Caterpillar Mitsubishi Ltd Drill with chip breaker for high hardness
JPS63237809A (ja) * 1987-03-25 1988-10-04 Mitsubishi Metal Corp ドリル
JP2002301612A (ja) * 2001-04-02 2002-10-15 Toshiba Tungaloy Co Ltd ドリル
JP2019209439A (ja) * 2018-06-06 2019-12-12 株式会社タンガロイ ドリル
WO2020054702A1 (ja) * 2018-09-12 2020-03-19 京セラ株式会社 切削インサート、回転工具及び切削加工物の製造方法
JP2021088007A (ja) * 2019-12-02 2021-06-10 三菱マテリアル株式会社 ドリル

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7740817B1 (ja) * 2024-11-15 2025-09-17 住友電工ハードメタル株式会社 ドリル

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CN118891122A (zh) 2024-11-01
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US20250214155A1 (en) 2025-07-03
JP7727830B2 (ja) 2025-08-21

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