WO2008013725A2 - Drill for machining fiber reinforced composite material - Google Patents

Drill for machining fiber reinforced composite material Download PDF

Info

Publication number
WO2008013725A2
WO2008013725A2 PCT/US2007/016319 US2007016319W WO2008013725A2 WO 2008013725 A2 WO2008013725 A2 WO 2008013725A2 US 2007016319 W US2007016319 W US 2007016319W WO 2008013725 A2 WO2008013725 A2 WO 2008013725A2
Authority
WO
WIPO (PCT)
Prior art keywords
drill
degrees
angle
drill according
further including
Prior art date
Application number
PCT/US2007/016319
Other languages
French (fr)
Other versions
WO2008013725A3 (en
Inventor
Karthikeyan Sampath
Wangyang Ni
Original Assignee
Kennametal Inc.
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 Kennametal Inc. filed Critical Kennametal Inc.
Priority to BRPI0713514-9A priority Critical patent/BRPI0713514A2/en
Priority to JP2009521769A priority patent/JP2009544481A/en
Priority to CA 2654976 priority patent/CA2654976A1/en
Priority to EP07810590.5A priority patent/EP2043803A4/en
Priority to CN2007800248471A priority patent/CN101484263B/en
Publication of WO2008013725A2 publication Critical patent/WO2008013725A2/en
Publication of WO2008013725A3 publication Critical patent/WO2008013725A3/en

Links

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
    • B23B2222/00—Materials of tools or workpieces composed of metals, alloys or metal matrices
    • B23B2222/28—Details of hard metal, i.e. cemented carbide
    • 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
    • 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
    • B23B2226/00—Materials of tools or workpieces not comprising a metal
    • B23B2226/31—Diamond
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2228/00—Properties of materials of tools or workpieces, materials of tools or workpieces applied in a specific manner
    • B23B2228/10—Coatings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2251/00—Details of tools for drilling machines
    • B23B2251/04—Angles, e.g. cutting angles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2251/00—Details of tools for drilling machines
    • B23B2251/14—Configuration of the cutting part, i.e. the main 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
    • 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
    • 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

  • CFRP Carbon fiber reinforced plastic
  • CFRP composite materials pose tremendous problems in machining.
  • PCD polycrystalline diamond
  • Typical defects after drilling using conventional PCD drills include spalling, fiber pull-out, burning, and the like, as shown in FIGURE 8.
  • Drill geometry is considered as one of the most important factor affecting tool performance.
  • CFRP is extremely abrasive, which requires tools to have excellent hardness.
  • a split-point, two-fluted twist drill for machining fiber reinforced composite material.
  • the drill has a lip relief angle between about 10 and 20 degrees; a notch rake angle of between about -5 and 10 degrees; a chisel edge length up to about 0.035mm; a chisel edge angle of between about 105 and 120 degrees; a splitting angle between about 130 and 150 degrees; and a point angle of between about 70 and 100 degrees.
  • a split-point diamond coated twist drill for machining fiber reinforced composite material made of a substrate comprised of tungsten carbide cemented with cobalt in a range between about 3 to 10 wt. %, wherein said drill has a point angle of about 90 degrees.
  • a split-point, two-fluted, diamond coated twist drill for machining fiber reinforced composite material having a lip relief angle between about 10 and 20 degrees; a notch rake angle of between about -5 and 10 degrees; a chisel edge length less than about 0.035mm; a point angle of between about 70 and 100 degrees; a helix angle between about 25 and 35 degrees; a web thickness at the point prior to splitting of between about 20 and 30 percent of a drill diameter; a notch angle between about 30 and 40 degrees with respect to a longitudinal axis of the drill; a chisel edge angle between about 105 and 120 degrees; a splitting angle between about 130 and 150 degrees; a body clearance diameter between about 92 and 96 percent of the drill diameter; and a margin width between about 5 to 10 percent of the drill diameter.
  • FIGURE 1 is a partial perspective view of a drill for machining fiber reinforced composite materials according to an embodiment of the invention
  • FIGURE 2 is a partial side view of the drill of FIGURE 1 showing a point angle
  • FIGURE 3 is another partial side view of the drill of FIGURE 1 showing a relief angle
  • FIGURE 4 is an enlarged side view of the drill of FIGURE 1 showing the notch rake angle
  • FIGURE 5 is an end view of the drill of FIGURE 1 showing a splitting angle, web thickness and margin thickness;
  • FIGURES 6(a) and 6(b) compares the hole quality produced by a 5 ⁇ m diamond coated drill of the invention and a conventional PCD drill when drilling a type A CFRP composite material, respectively;
  • FIGURE 7 compares the hole quality produced by a conventional PCD drill and a diamond coated drill of the invention when drilling a type B CFRP composite material; and [0016] FIGURE 8 shows typical defects after drilling using conventional PCD drills.
  • a two-fluted, diamond coated twist drill prior to splitting is generally shown at 10 according to an embodiment of the invention.
  • the drill 10 is made from a tungsten carbide (WC) substrate with cemented cobalt (Co) in a range between about 3 to 10 wt. % and a diamond coating having a thickness in a range between about 3 to 20 ⁇ m deposited by using a chemical vapor deposition (CVD) process.
  • the hone radius (or cutting edge radius) is between about 5 to 30 microns after coating.
  • the drill 10 has a shank 11, a longitudinal axis 12 and includes two flutes, 14 and 16, at a helix angle 18 that is in a range between about 25 and 35 degrees with respect to the longitudinal axis 12.
  • a margin width 24 is maintained between about 5 to 10 percent of the drill diameter 22.
  • a body clearance diameter 26 is maintained at between about 92 to 96 percent of the drill diameter 22.
  • a web thickness 28 (the distance between cutting lips 38 and 40) at the point 30 (before splitting) is about 20 to 30 percent of the drill diameter 22.
  • Point angle 34 is between about 70 and 100 degrees, and preferably about 90 degrees.
  • a clearance angle or lip relief angle 36 is between about 10 and 20 degrees.
  • a chisel edge angle 42 is between about 105 and 120 degrees.
  • a chisel edge length 43 is less than about 0.035mm.
  • a splitting angle 44 (secondary cutting edge angle) is between about 130 and 150 degrees.
  • a notch angle 46 is between about 30 and 40 degrees with respect to the drill axis 12.
  • a notch rake angle 48 lies between about -5 and 10 degrees.
  • PCD polycrystalline diamond
  • FIGURES 6(a) and (b) compare the hole quality produced by a 5 ⁇ m diamond coated drill of the invention and a conventional polycrystalline diamond (PCD) drill when drilling a type A carbon fiber reinforced plastic (CFRP) composite material, respectively.
  • the 5 ⁇ m diamond coated drill of the invention produced unexpected results of much better hole quality than the conventional PCD drill.
  • the 5 ⁇ m diamond coated drill of the invention produced unexpected results by outperforming the conventional PCD drill in tool life (97 holes vs. 50 holes).
  • the uncoated WC-6 wt. % drill can only make 10 quality holes due to severe abrasive wear by carbon fibers.
  • the drill of the invention is not limited by the thickness of the diamond coating.
  • the drill of the invention can be made of a WC substrate with a diamond coating thickness in a range between about 3 to 20 ⁇ m.
  • the drill of the invention can be practiced with a radius of the cutting edge in a range between about 5 to 30 ⁇ m.
  • FIGURE 7 compares the hole quality produced by PCD drill and diamond coated drills when drilling a type B CFRP composite material. Both the 5 ⁇ m and 12 ⁇ m diamond coated drills produced unexpected results by outperforming the conventional PCD drill in hole quality and tool life.
  • the split-point, two-fluted twist drill 10 of the invention with a WC-6 wt. % Co substrate and either a 5 ⁇ m of a 12 ⁇ m diamond coating produced unexpected results by outperforming a conventional polycrystalline diamond (PCD) drill when machining fiber reinforced composite material, such as a Type A and B carbon fiber reinforced plastic (CFRP) composite material.
  • PCD polycrystalline diamond
  • CFRP carbon fiber reinforced plastic
  • the invention is not limited to a drill for machining CFRP composite material.
  • the drill of the invention can be used for machining glass fiber reinforced material, and the like.
  • the drill of the invention can be used in dry or wet environments.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Drilling Tools (AREA)

Abstract

A diamond coated drill (10) capable of drilling holes in fiber reinforced composite materials. The drill (10) is made from a tungsten carbide (WC) substrate with cemented cobalt (Co) in a range between about 3 to 10 wt. % and a diamond coating having a thickness in a range between 3 to 20 microns. The drill (10) includes a shank (11), a longitudinal axis and includes two flutes (14 and 16) at a helix angle (18) that is in a range between 25 and 35 degrees with respect to the axis (12). A margin width (24) is maintained between about 5 to 10 percent of the drill diameter (22). A body clearance diameter (26) is maintained at between about 92 to 96 percent of the drill diameter (22). A web thickness (28) before splitting is about 20 to 30 percent of the drill diameter (22). A clearance angle or lip relief angle (36) is between about 10 and 20 degrees. A chisel edge angle (42) is between about 105 and 120 degrees. A chisel edge length (43) is up to about 0.035mm. A splitting angle (44) is between about 130 and 150 degrees. A notch angle (46) is between about 30 and 40 degrees with respect to the drill axis (12). A notch rake angle (48) lies between about -5 and 10 degrees. A split point angle (34) is between about 70 and 100 degrees, and preferably about 90 degrees.

Description

DRILL FOR MACHINING FIBER REINFORCED COMPOSITE MATERIAL
BACKGROUND OF THE INVENTION
[0001 ] Carbon fiber reinforced plastic (CFRP) consist of a wide range of composite materials with different fiber type, fiber orientation, fiber content, and matrix materials. In recent years, the use of fiber reinforced composite materials has been steadily increasing in many industries. For example, CFRP composite materials have found increasing applications in aerospace and automotive industries due to their high specific strength and specific stiffness. As the use of such materials expands, there will be an increased need for a cost- effective method of producing high quality holes in such materials with dimensions which are within narrow tolerances.
[0002] However, CFRP composite materials pose tremendous problems in machining. Currently, the market is dominated by polycrystalline diamond (PCD) drills. Typical defects after drilling using conventional PCD drills include spalling, fiber pull-out, burning, and the like, as shown in FIGURE 8.
[0003] It has been recognized that spalling and fiber-pull out are caused by the tool thrust. Drill geometry is considered as one of the most important factor affecting tool performance. In addition, due to the high strength of the fiber reinforcement, CFRP is extremely abrasive, which requires tools to have excellent hardness.
[0004] Thus, there is a need to provide a drill that minimizes exit hole defects when machining CFRP composite materials.
BRIEF SUMMARY OF THE INVENTION
[0005] Briefly, according to this invention, there is provided a split-point, two-fluted twist drill for machining fiber reinforced composite material. The drill has a lip relief angle between about 10 and 20 degrees; a notch rake angle of between about -5 and 10 degrees; a chisel edge length up to about 0.035mm; a chisel edge angle of between about 105 and 120 degrees; a splitting angle between about 130 and 150 degrees; and a point angle of between about 70 and 100 degrees.
[0006] In another embodiment, a split-point diamond coated twist drill for machining fiber reinforced composite material made of a substrate comprised of tungsten carbide cemented with cobalt in a range between about 3 to 10 wt. %, wherein said drill has a point angle of about 90 degrees. [0007] In yet another embodiment, a split-point, two-fluted, diamond coated twist drill for machining fiber reinforced composite material having a lip relief angle between about 10 and 20 degrees; a notch rake angle of between about -5 and 10 degrees; a chisel edge length less than about 0.035mm; a point angle of between about 70 and 100 degrees; a helix angle between about 25 and 35 degrees; a web thickness at the point prior to splitting of between about 20 and 30 percent of a drill diameter; a notch angle between about 30 and 40 degrees with respect to a longitudinal axis of the drill; a chisel edge angle between about 105 and 120 degrees; a splitting angle between about 130 and 150 degrees; a body clearance diameter between about 92 and 96 percent of the drill diameter; and a margin width between about 5 to 10 percent of the drill diameter.
BRIEF DESCRIPTION OF THE DRAWINGS
[0008] Further features of the present invention, as well as the advantages derived therefrom, will become clear from the following detailed description made with reference to the drawings in which:
[0009] FIGURE 1 is a partial perspective view of a drill for machining fiber reinforced composite materials according to an embodiment of the invention;
[0010] FIGURE 2 is a partial side view of the drill of FIGURE 1 showing a point angle; [0011] FIGURE 3 is another partial side view of the drill of FIGURE 1 showing a relief angle;
[0012] FIGURE 4 is an enlarged side view of the drill of FIGURE 1 showing the notch rake angle;
[0013] FIGURE 5 is an end view of the drill of FIGURE 1 showing a splitting angle, web thickness and margin thickness;
[0014] FIGURES 6(a) and 6(b) compares the hole quality produced by a 5 μm diamond coated drill of the invention and a conventional PCD drill when drilling a type A CFRP composite material, respectively;
[0015] FIGURE 7 compares the hole quality produced by a conventional PCD drill and a diamond coated drill of the invention when drilling a type B CFRP composite material; and [0016] FIGURE 8 shows typical defects after drilling using conventional PCD drills. DETAILED DESCRIPTION OF THE INVENTION
[0017] Referring to FIGURES 1-5, wherein like reference characters represent like elements, a two-fluted, diamond coated twist drill prior to splitting is generally shown at 10 according to an embodiment of the invention. Preferably, the drill 10 is made from a tungsten carbide (WC) substrate with cemented cobalt (Co) in a range between about 3 to 10 wt. % and a diamond coating having a thickness in a range between about 3 to 20 μm deposited by using a chemical vapor deposition (CVD) process. The hone radius (or cutting edge radius) is between about 5 to 30 microns after coating.
[0018] The drill 10 has a shank 11, a longitudinal axis 12 and includes two flutes, 14 and 16, at a helix angle 18 that is in a range between about 25 and 35 degrees with respect to the longitudinal axis 12. A margin width 24 is maintained between about 5 to 10 percent of the drill diameter 22. A body clearance diameter 26 is maintained at between about 92 to 96 percent of the drill diameter 22. A web thickness 28 (the distance between cutting lips 38 and 40) at the point 30 (before splitting) is about 20 to 30 percent of the drill diameter 22. Point angle 34 is between about 70 and 100 degrees, and preferably about 90 degrees. A clearance angle or lip relief angle 36 is between about 10 and 20 degrees. A chisel edge angle 42 is between about 105 and 120 degrees. A chisel edge length 43 is less than about 0.035mm. A splitting angle 44 (secondary cutting edge angle) is between about 130 and 150 degrees. A notch angle 46 is between about 30 and 40 degrees with respect to the drill axis 12. A notch rake angle 48 lies between about -5 and 10 degrees. [0019] DRILL GEOMETRY
[0020] The geometry of the drill 10 of the invention was tested and compared with a number of different geometries as listed in Table I. The results of the comparison shows that the brad and spur point geometry and the 90-degree split point drill geometry demonstrated the results of the smallest exit hole defect size. However, the brad and spur point drill had chipping issues, and hence had a reduced tool life. Moreover, the brad and spur point drill is more difficult to grind, and its sharp edges make it unsuitable for coating. Thus, the 90- degree split point drill geometry demonstrated the best overall performance and results. Table I. Drills of Different Geometry and Corresponding Hole Defect Size
Drill Geometry Hole Defect Size (inch)
Brad and spur point 0.05
HP point 0.12
TX point (straight fluted) 0.13
90-degree split point 0.09
135 degree split point 0.15
185/90/70 degree split point 0.10
[0021 ] CVD DIAMOND COATINGS
[0022] The performance of the drill 10 of the invention on two types of carbon fiber reinforced plastic (CFRP) composite materials (namely, type A and B) that are being used in aircraft skin was evaluated. In particular, the 90-degree split point drill geometry was employed in this evaluation. Diamond coatings of two different thicknesses were deposited on drill substrate made of tungsten carbide (WC) with 6 wt. % cobalt (Co) by using a chemical vapor deposition (CVD) method. It will be appreciated that the invention is not limited by the particular weight percent of cobalt, and that the invention can be practiced with a WC substrate with cemented cobalt in a range of between about 3 to 10 wt. % cobalt. The conventional polycrystalline diamond (PCD) drill is currently the dominant product on the market for CFRP drilling. The radius of the cutting edge and the thrust when drilling the first hole are listed in Table II. As shown in Table II, the 90-degree split point drill geometry produced smaller thrust and sharper cutting edge, which is beneficial to hole quality, as observed by the inventors.
Table II. Drill Geometry, Cutting Edge Radius and Thrust
Figure imgf000005_0001
[0023] FIGURES 6(a) and (b) compare the hole quality produced by a 5 μm diamond coated drill of the invention and a conventional polycrystalline diamond (PCD) drill when drilling a type A carbon fiber reinforced plastic (CFRP) composite material, respectively. As shown, the 5 μm diamond coated drill of the invention produced unexpected results of much better hole quality than the conventional PCD drill. Moreover, the 5 μm diamond coated drill of the invention produced unexpected results by outperforming the conventional PCD drill in tool life (97 holes vs. 50 holes). As a comparison, the uncoated WC-6 wt. % drill can only make 10 quality holes due to severe abrasive wear by carbon fibers.
[0024] It will be appreciated that the drill of the invention is not limited by the thickness of the diamond coating. For example, the drill of the invention can be made of a WC substrate with a diamond coating thickness in a range between about 3 to 20 μm. Further, it will be appreciated that the drill of the invention can be practiced with a radius of the cutting edge in a range between about 5 to 30 μm.
[0025] FIGURE 7 compares the hole quality produced by PCD drill and diamond coated drills when drilling a type B CFRP composite material. Both the 5 μm and 12 μm diamond coated drills produced unexpected results by outperforming the conventional PCD drill in hole quality and tool life.
[0026] As described above, the split-point, two-fluted twist drill 10 of the invention with a WC-6 wt. % Co substrate and either a 5 μm of a 12 μm diamond coating produced unexpected results by outperforming a conventional polycrystalline diamond (PCD) drill when machining fiber reinforced composite material, such as a Type A and B carbon fiber reinforced plastic (CFRP) composite material. Further, the invention is not limited to a drill for machining CFRP composite material. For example, the drill of the invention can be used for machining glass fiber reinforced material, and the like. In addition, the drill of the invention can be used in dry or wet environments.
[0027] The documents, patents and patent applications referred to herein are hereby incorporated by reference.
[0028] While the invention has been specifically described in connection with certain specific embodiments thereof, it is to be understood that this is by way of illustration and not of limitation, and the scope of the appended claims should be construed as broadly as the prior art will permit.

Claims

CLAIMS What is claimed is:
1. A split-point, two-fluted, diamond coated twist drill for machining fiber reinforced composite material having a lip relief angle between about 10 and 20 degrees; a notch rake angle of between about -5 and 10 degrees; a chisel edge length less than about 0.035mm; and a point angle of between about 70 and 100 degrees.
2. The drill according to Claim 1, wherein the point angle is about 90 degrees.
3. The drill according to Claim 1 , further including a helix angle of said flutes between about 25 and 35 degrees.
4. The drill according to Claim 1, further including a web thickness at the point prior to splitting of between about 20 and 30 percent of a drill diameter.
5. The drill according to Claim 1, further including a notch angle between about 30 and 40 degrees with respect to a longitudinal axis of said drill.
6. The drill according to Claim 1 , further including a chisel edge angle between about 105 and 120 degrees.
7. The drill according to Claim 1, further including a splitting angle between about 130 and 150 degrees.
8. The drill according to Claim 1, further including a body clearance diameter between about 92 and 96 percent of a drill diameter.
9. The drill according to Claim 1 , further including a margin width between about 5 to 10 percent of a drill diameter.
10. A split-point, diamond coated twist drill for machining fiber reinforced composite material made of a substrate comprised of tungsten carbide cemented with cobalt in a range between about 3 to 10 wt. %, wherein said drill has a point angle of about 90 degrees.
11. The drill according to Claim 10, wherein the diamond coating has a thickness in a range between about 3 to 20 μm.
12. The drill according to Claim 11, wherein the thickness of the diamond coating is about 5 μm.
13. The drill according to Claim 11, wherein the thickness of the diamond coating is about 12 μm.
14. The drill according to Claim 10, further including a hone radius of between about 5 to 30 microns.
15. The drill according to Claim 10, wherein the cobalt is about 6 wt. %.
16. The drill according to Claim 10, further including a lip relief angle between about 10 and 20 degrees; a notch rake angle of between about -5 and 10 degrees; and a chisel edge length less than about 0.035mm.
17. The drill according to Claim 16, further including two flutes having a helix angle between about 25 and 35 degrees.
18. The drill according to Claim 16, further including a web thickness at the point prior to splitting of between about 20 and 30 percent of a drill diameter.
19. The drill according to Claim 16, further including a notch angle between about 30 and 40 degrees with respect to a longitudinal axis of said drill.
20. The drill according to Claim 16, further including a chisel edge angle between about 105 and 120 degrees.
21. The drill according to Claim 16, further including a splitting angle between about 130 and 150 degrees.
22. The drill according to Claim 16, further including a body clearance diameter between about 92 and 96 percent.of a drill diameter.
23. The drill according to Claim 16, further including a margin width between about 5 to 10 percent of a drill diameter.
24. A split-point, two-fluted, diamond coated twist drill for machining fiber reinforced composite material having a Hp relief angle between about 10 and 20 degrees; a notch rake angle of between about -5 and 10 degrees; a chisel edge length less than about 0.035mm; a point angle of between about 70 and 100 degrees; a helix angle between about 25 and 35 degrees; a web thickness at the point prior to splitting of between about 20 and 30 percent of a drill diameter; a notch angle between about 30 and 40 degrees with respect to a longitudinal axis of said drill; a chisel edge angle between about 105 and 120 degrees; a splitting angle between about 130 and 150 degrees; a body clearance diameter between about 92 and 96 percent of the drill diameter; and a margin width between about 5 to 10 percent of the drill diameter.
25. The drill according to Claim 24, wherein the diamond coating has a thickness in a range between about 3 to 20 μm.
26. The drill according to Claim 25, wherein the thickness of the diamond coating is about 5 μm.
27. The drill according to Claim 25, wherein the thickness of the diamond coating is about 12 μm.
PCT/US2007/016319 2006-07-24 2007-07-19 Drill for machining fiber reinforced composite material WO2008013725A2 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
BRPI0713514-9A BRPI0713514A2 (en) 2006-07-24 2007-07-19 diamond-coated, biplane and split-tip twist drill
JP2009521769A JP2009544481A (en) 2006-07-24 2007-07-19 Drill for cutting fiber reinforced composite materials
CA 2654976 CA2654976A1 (en) 2006-07-24 2007-07-19 Drill for machining fiber reinforced composite material
EP07810590.5A EP2043803A4 (en) 2006-07-24 2007-07-19 Drill for machining fiber reinforced composite material
CN2007800248471A CN101484263B (en) 2006-07-24 2007-07-19 Drill for machining fiber reinforced composite material

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US11/491,637 2006-07-24
US11/491,637 US20080019787A1 (en) 2006-07-24 2006-07-24 Drill for machining fiber reinforced composite material

Publications (2)

Publication Number Publication Date
WO2008013725A2 true WO2008013725A2 (en) 2008-01-31
WO2008013725A3 WO2008013725A3 (en) 2008-10-09

Family

ID=38971596

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2007/016319 WO2008013725A2 (en) 2006-07-24 2007-07-19 Drill for machining fiber reinforced composite material

Country Status (8)

Country Link
US (1) US20080019787A1 (en)
EP (1) EP2043803A4 (en)
JP (1) JP2009544481A (en)
CN (1) CN101484263B (en)
BR (1) BRPI0713514A2 (en)
CA (1) CA2654976A1 (en)
RU (1) RU2431548C2 (en)
WO (1) WO2008013725A2 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8163050B2 (en) 2007-01-22 2012-04-24 Aerospace Filtration Systems, Inc. Comb for inlet barrier filter system
CN102626853A (en) * 2011-02-07 2012-08-08 三菱综合材料株式会社 Cutting tool covered with diamond
GB2492583A (en) * 2011-07-06 2013-01-09 Sandvik Intellectual Property Twist drill for composite materials
JP2013506562A (en) * 2009-10-02 2013-02-28 マパル ファブリック フュール プラツィジョンズベルクゼウグ ドクトル．クレス カーゲー drill
US9694432B2 (en) 2011-09-19 2017-07-04 Exactaform Cutting Tools Limited Drill reamer
EP2550123B1 (en) 2010-03-25 2017-11-22 Klenk GmbH & Co. KG Drilling tool

Families Citing this family (34)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7950880B2 (en) * 2006-10-18 2011-05-31 Kennametal Inc. Spiral flute tap
US20090035083A1 (en) * 2007-08-03 2009-02-05 Hunter David T Double tipped diamond drill bit
DE102007044269A1 (en) * 2007-09-17 2009-03-19 Arno Friedrichs Partially ground tool bar made of sintered material
DE102008004564B4 (en) * 2008-01-15 2013-04-11 EMUGE-Werk Richard Glimpel GmbH & Co. KG Fabrik für Präzisionswerkzeuge Burr tool with point
US8061938B2 (en) * 2008-03-10 2011-11-22 Kennametal Inc. Cutting tool with chisel edge
DE102009025223A1 (en) * 2009-06-08 2010-12-09 MAPAL Fabrik für Präzisionswerkzeuge Dr. Kress KG drill
WO2011082161A1 (en) * 2009-12-28 2011-07-07 The Board Of Trustees Of The University Of Alabama For And On Behalf Of The University Of Alabama Fabrication method for diamond film coating of drill bit
GB201002375D0 (en) * 2010-02-12 2010-03-31 Element Six Production Pty Ltd A superhard tip, method for making same and tool comprising same
GB201007032D0 (en) 2010-04-27 2010-06-09 Dormer Tools Ltd Twist drill for advanced materials
CN102211218B (en) * 2011-04-01 2013-04-24 上海祥仁新材料有限公司 Diamond coated cutter and application thereof in processing of fiber composite material
KR20130032671A (en) * 2011-09-23 2013-04-02 대구텍 유한회사 Drilling tool for composite material
US20130098505A1 (en) * 2011-10-20 2013-04-25 Ci, Llc Cutting bit for pruning tool
JP5838858B2 (en) * 2012-02-28 2016-01-06 三菱マテリアル株式会社 Diamond coated cemented carbide drill with excellent wear resistance
CN103786265B (en) * 2012-10-30 2015-11-11 宁波江丰电子材料股份有限公司 The boring method of CFRP and CFRP workpiece
PL403436A1 (en) * 2013-04-05 2014-07-21 Politechnika Rzeszowska im. Ignacego Łukasiewicza Twist drill for drilling in composite materials
EP2990145B1 (en) 2013-04-26 2020-01-22 KYOCERA Corporation Drill and method for manufacturing cut product using same
CN103231415A (en) * 2013-04-27 2013-08-07 哈尔滨飞机工业集团有限责任公司 Method for producing holes on unidirectional composite tapes
JP6144766B2 (en) * 2013-07-22 2017-06-07 京セラ株式会社 CUTTING TOOL, CUTTING TOOL MANUFACTURING METHOD, AND CUTTING PRODUCT MANUFACTURING METHOD USING CUTTING TOOL
DE102013218446A1 (en) 2013-09-13 2015-03-19 Cemecon Ag Tool and method for cutting fiber reinforced materials
KR101995284B1 (en) * 2013-09-30 2019-07-02 쿄세라 코포레이션 Cutting tool and method for manufacturing cut product using same
DE102014204700B4 (en) * 2014-03-13 2022-02-17 Kennametal Inc. Rotary tool, in particular drilling tool and method for producing a rotary tool
CN104028812A (en) * 2014-06-16 2014-09-10 同济大学 Drill bit special for carbon fiber composite materials
CN104018156B (en) * 2014-06-18 2017-07-28 浙江工业大学 A kind of Metal Substrate/diamond laser composite coating and preparation method thereof
EP3081313A1 (en) * 2015-04-13 2016-10-19 Airbus Defence and Space GmbH Method and device for testing the surface condition of a component, in particular a carbon-fiber-reinforced plastic component
CN105195793B (en) * 2015-09-11 2017-11-10 沈阳航空航天大学 A kind of processing drill for fiber-reinforced resin matrix compound material
CN105215433B (en) * 2015-09-11 2017-06-30 沈阳航空航天大学 A kind of drill bit for processing fiber-reinforced resin matrix compound material
CN105345098B (en) * 2015-12-09 2018-08-28 湖南科技大学 A kind of drill bit capable of machining hole and hole forming method suitable for carbon fibre composite
WO2019049252A1 (en) * 2017-09-07 2019-03-14 住友電工ハードメタル株式会社 Rotary cutting tool
CN109986647A (en) * 2018-01-03 2019-07-09 宁波江丰电子材料股份有限公司 The processing method and drilling tool of carbon fibre reinforced plastic
USD878437S1 (en) * 2018-08-06 2020-03-17 Peter L. Bono Helical fluted forward and reverse rotation cutting tool
USD878438S1 (en) * 2018-08-06 2020-03-17 Peter L. Bono Helical fluted forward and reverse rotation cutting tool
JP1622531S (en) * 2018-08-07 2019-01-21
JP7082934B2 (en) 2018-10-31 2022-06-09 ユニオンツール株式会社 Drilling tool and its manufacturing method
JP7140816B2 (en) 2020-02-07 2022-09-21 ユニオンツール株式会社 Drill for printed wiring board

Family Cites Families (50)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2859645A (en) * 1957-04-05 1958-11-11 Cleveland Twist Drill Co Drilling bit for construction work
US3078546A (en) * 1960-06-13 1963-02-26 Bruce E Kiernan Cutting tool
US3387511A (en) * 1966-05-02 1968-06-11 Lockheed Aircraft Corp Twist drill
GB1317188A (en) * 1969-10-20 1973-05-16 Osborn Mushet Tools Ltd Twist drills
US3934319A (en) * 1975-04-21 1976-01-27 General Electric Company Cutting inserts
US4529341A (en) * 1982-09-29 1985-07-16 Hughes Helicopters, Inc. Drill bit for Kevlar laminates
JPS59219108A (en) * 1983-05-25 1984-12-10 Sumitomo Electric Ind Ltd Drill
US4556347A (en) * 1984-05-11 1985-12-03 Lockheed Corporation Split-point twist drill
US4756650A (en) * 1986-11-26 1988-07-12 Kabushiki Kaisha Kobe Seiko Sho Twist drill
US4789276A (en) * 1987-09-04 1988-12-06 Diversified Electronics, Inc. Twist drill for tough plastics
US4896503A (en) * 1987-11-19 1990-01-30 Alexandrex, Inc. Muffling and purifying device for combustion gases of general application
EP0320881B2 (en) * 1987-12-14 2003-10-22 Mitsubishi Materials Corporation Twist drill
US5230593A (en) * 1987-12-14 1993-07-27 Mitsubishi Kinzoku Kabushiki Kaisha Twist drill
US5011342A (en) * 1988-03-14 1991-04-30 501 Greenfield Industries, Inc. Twist drill
US4898503A (en) * 1988-07-05 1990-02-06 Lockheed Corporation Twist drill
US5141369A (en) * 1988-07-18 1992-08-25 Palace Hilard F Cutting tool for plastic materials
JPH02152708A (en) * 1988-12-02 1990-06-12 Hitachi Koki Co Ltd Twist drill for compound material machining
JP2890592B2 (en) * 1989-01-26 1999-05-17 住友電気工業株式会社 Carbide alloy drill
JP2984446B2 (en) * 1992-01-07 1999-11-29 三菱重工業株式会社 Drill
US5415500A (en) * 1993-10-04 1995-05-16 Rockwell International Corp. Method of drilling holes in reinforced metal matrix composites
JPH07164228A (en) * 1993-12-09 1995-06-27 Union Tool Kk Small diameter drill for printed board and machining method therefor
DE4424885A1 (en) * 1994-07-14 1996-01-18 Cerasiv Gmbh All-ceramic drill
US6036410A (en) * 1994-12-27 2000-03-14 Shun'ko; Evgeny V. Tip portion of the drill bit
US5622462A (en) * 1995-04-11 1997-04-22 Credo Tool Company Twist drill bit
US5636948A (en) * 1995-05-04 1997-06-10 Fullerton Tool Company, Inc. Drill for synthetic fiber filled plastic and like materials
US5599144A (en) * 1995-06-23 1997-02-04 International Business Machines Corporation Low friction flute tungsten carbon microdrill
DE69617692T2 (en) * 1995-07-27 2002-08-08 Ralph C. Mays BOHR
SE507827C2 (en) * 1996-05-02 1998-07-20 Sandvik Ab Drill
US5716170A (en) * 1996-05-15 1998-02-10 Kennametal Inc. Diamond coated cutting member and method of making the same
EP0971807B1 (en) * 1997-03-25 2003-10-22 GÜHRING, Jörg, Dr. Boring bit
US5931615A (en) * 1997-04-03 1999-08-03 Credo Tool Company Twist drill bit
US5846035A (en) * 1997-07-11 1998-12-08 General Electric Company Damage resistant drill
US6283682B1 (en) * 1997-09-30 2001-09-04 Jerald D. Plummer Helically fluted twist drill device
US6238151B1 (en) * 1998-09-28 2001-05-29 Mitsubishi Materials Corporation Drilling tool and throw-away tip for use in drilling work
US6315504B1 (en) * 1998-10-27 2001-11-13 Nachi-Fujikoshi Corporation Twist Drill
US5967712A (en) * 1998-11-03 1999-10-19 Kennametal Inc. Cutting tool for machining bores in materials having spring-back
DE19907749A1 (en) * 1999-02-23 2000-08-24 Kennametal Inc Sintered hard metal body useful as cutter insert or throwaway cutter tip has concentration gradient of stress-induced phase transformation-free face-centered cubic cobalt-nickel-iron binder
DE19955172A1 (en) * 1999-11-16 2001-05-23 Kennametal Inc Method of grinding a drill bit and drill bit
US6443674B1 (en) * 2000-05-19 2002-09-03 Ics Cutting Tools, Inc. Self-centering twist drill having a modified flat bottom section and a helical crown point tip
SE516229C2 (en) * 2000-05-26 2001-12-03 Eero Nygaard drill point
US20020127085A1 (en) * 2000-07-17 2002-09-12 Arthur Field Double-tech self-drilling screw
US6585460B1 (en) * 2000-11-13 2003-07-01 General Electric Company Drill having machine grindable cutting edge
JP4415485B2 (en) * 2000-11-14 2010-02-17 三菱マテリアル株式会社 Small drill
EP1923157B1 (en) * 2001-07-10 2020-07-29 Mitsubishi Materials Corporation Drill
US6676342B2 (en) * 2002-01-09 2004-01-13 Allied Machine & Engineering Corp. Drill with specialized drill point geometry
JP2003300110A (en) * 2002-04-03 2003-10-21 Osg Corp Drill and manufacturing method therefor
US7018144B2 (en) * 2002-07-02 2006-03-28 Mitsubishi Materials Corporation Drill
JP2004160581A (en) * 2002-11-12 2004-06-10 Mitsubishi Materials Kobe Tools Corp Manufacturing method for diamond coated tool, and diamond coated tool
DE20304580U1 (en) * 2003-03-21 2004-08-12 Gühring, Jörg, Dr. drill
US7237986B2 (en) * 2004-08-09 2007-07-03 Black & Decker Inc. High speed metal drill bit

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of EP2043803A4 *

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8163050B2 (en) 2007-01-22 2012-04-24 Aerospace Filtration Systems, Inc. Comb for inlet barrier filter system
JP2013506562A (en) * 2009-10-02 2013-02-28 マパル ファブリック フュール プラツィジョンズベルクゼウグ ドクトル．クレス カーゲー drill
EP2550123B1 (en) 2010-03-25 2017-11-22 Klenk GmbH & Co. KG Drilling tool
CN102626853A (en) * 2011-02-07 2012-08-08 三菱综合材料株式会社 Cutting tool covered with diamond
CN102626853B (en) * 2011-02-07 2015-11-25 三菱综合材料株式会社 Diamond-coated cutting element
GB2492583A (en) * 2011-07-06 2013-01-09 Sandvik Intellectual Property Twist drill for composite materials
WO2013005010A1 (en) 2011-07-06 2013-01-10 Sandvik Intellectual Property Ab Twist drill and method of drilling composite materials, use and method regrinding and manufacturing thereof
CN103648694A (en) * 2011-07-06 2014-03-19 山特维克知识产权股份有限公司 Twist drill and method of drilling composite materials, use and method regrinding and manufacturing thereof
RU2600465C2 (en) * 2011-07-06 2016-10-20 Сандвик Интеллекчуал Проперти Аб Twist drill and method of drilling composite materials, use and method regrinding and manufacturing thereof
US9597735B2 (en) 2011-07-06 2017-03-21 Sandvik Intellectual Property Ab Twist drill and method of drilling composite materials, use and method regrinding and manufacturing thereof
CN103648694B (en) * 2011-07-06 2017-06-09 山特维克知识产权股份有限公司 Fried dough twist drilling tool, the method for drilling composite, purposes and its grind again and manufacture method
US9694432B2 (en) 2011-09-19 2017-07-04 Exactaform Cutting Tools Limited Drill reamer

Also Published As

Publication number Publication date
CN101484263B (en) 2012-07-11
BRPI0713514A2 (en) 2012-01-31
US20080019787A1 (en) 2008-01-24
RU2431548C2 (en) 2011-10-20
CA2654976A1 (en) 2008-01-31
JP2009544481A (en) 2009-12-17
EP2043803A2 (en) 2009-04-08
WO2008013725A3 (en) 2008-10-09
RU2009106075A (en) 2010-08-27
CN101484263A (en) 2009-07-15
EP2043803A4 (en) 2015-09-23

Similar Documents

Publication Publication Date Title
EP2043803A2 (en) Drill for machining fiber reinforced composite material
US7431538B1 (en) End mill for orbital drilling of fiber reinforced plastic materials
EP1926567B1 (en) Twist drill
EP2286945B1 (en) Twist drill bit
CA1037298A (en) Cutting tool and method for making same
EP2729271B1 (en) Twist drill, method of drilling composite materials using such a twist drill and use of such a twist drill
US4480952A (en) Non-burring drill for composite materials
CN1891385A (en) Twist drill
CA2744899A1 (en) End mill for orbital drilling
US20020044843A1 (en) Hole forming tool
WO2010086988A1 (en) Double angle drill
CN113710394B (en) Insert and cutting tool provided with same
CN108179398A (en) A kind of diamond-coated drill and preparation method thereof
JP5258677B2 (en) Triple angle drill
Kwon et al. Performance enhancement of diamond-coating on step drill for machining CFRPs
US5813804A (en) Boring tool for composite laminate materials
KR20200080609A (en) A Tool for CFRP Hole with Good Cutting Performance
JP2008194774A (en) Long drill formed of super-hard material for deep hole boring
Jugrestan et al. Evaluation of the Problems that Arise during CFRP Drilling

Legal Events

Date Code Title Description
WWE Wipo information: entry into national phase

Ref document number: 200780024847.1

Country of ref document: CN

121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 07810590

Country of ref document: EP

Kind code of ref document: A2

DPE1 Request for preliminary examination filed after expiration of 19th month from priority date (pct application filed from 20040101)
WWE Wipo information: entry into national phase

Ref document number: 9765/DELNP/2008

Country of ref document: IN

ENP Entry into the national phase

Ref document number: 2654976

Country of ref document: CA

REEP Request for entry into the european phase

Ref document number: 2007810590

Country of ref document: EP

WWE Wipo information: entry into national phase

Ref document number: 2009521769

Country of ref document: JP

Ref document number: 2007810590

Country of ref document: EP

NENP Non-entry into the national phase

Ref country code: DE

ENP Entry into the national phase

Ref document number: 2009106075

Country of ref document: RU

Kind code of ref document: A

ENP Entry into the national phase

Ref document number: PI0713514

Country of ref document: BR

Kind code of ref document: A2

Effective date: 20081230

DPE1 Request for preliminary examination filed after expiration of 19th month from priority date (pct application filed from 20040101)