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WO2011132686A1 - Foret à canon - Google Patents

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Publication number
WO2011132686A1
WO2011132686A1 PCT/JP2011/059662 JP2011059662W WO2011132686A1 WO 2011132686 A1 WO2011132686 A1 WO 2011132686A1 JP 2011059662 W JP2011059662 W JP 2011059662W WO 2011132686 A1 WO2011132686 A1 WO 2011132686A1
Authority
WO
WIPO (PCT)
Prior art keywords
opening
flow passage
gun drill
portion flow
coolant
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/JP2011/059662
Other languages
English (en)
Japanese (ja)
Inventor
公志 西川
賢傑 崔
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.)
Tungaloy Corp
Original Assignee
Tungaloy 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 Tungaloy Corp filed Critical Tungaloy Corp
Publication of WO2011132686A1 publication Critical patent/WO2011132686A1/fr
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
    • B23B51/06—Drills with lubricating or cooling equipment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B51/00—Tools for drilling machines
    • B23B51/06—Drills with lubricating or cooling equipment
    • B23B51/063—Deep hole drills, e.g. ejector drills
    • B23B51/066—Gun drills

Definitions

  • the present invention relates to a single-blade gun drill in which a coolant flow passage is formed.
  • a gun drill When drilling small-diameter deep holes, a gun drill is generally used, and a single-edged gun drill is often used among gun drills.
  • Some single-blade gun drills have a flow passage formed therein so that coolant (cutting oil) supplied from the rear end portion is injected from the front end portion (see Patent Document 1). ).
  • coolant cutting oil supplied from the rear end portion
  • the coolant When the coolant is injected from the tip of the gun drill, the frictional force generated between the cutting edge and the hole bottom is reduced, and the cutting edge is also cooled.
  • the coolant also has a function of discharging the generated chips out of the machining hole.
  • the chip discharge effect depends on the coolant flow rate passing through the chip discharge groove formed on the side of the gun drill, and the higher the flow rate, the higher the discharge effect.
  • An object of the present invention is to provide a gun drill in which the chip discharge capability is improved by increasing the flow rate of the coolant flowing in the chip discharge groove without reducing the strength of the tip.
  • the gun drill of the present invention has a flow path for the coolant flowing along the longitudinal direction inside the substantially rod-shaped gun drill having a rotation axis extending in the longitudinal direction.
  • a chip discharge groove for discharging chips is formed on the outer peripheral surface of the gun drill along the longitudinal direction, and a rake face is formed along the longitudinal direction in the chip discharge groove, and the tip of the gun drill is formed.
  • a coolant guide surface is formed at the tip of the gun drill, the coolant guide surface intersects the flank surface, and intersects one wall surface defining the chip discharge groove,
  • the opening on the front end side of the flow passage has first and second openings, The first opening is formed in the flank; The second opening is formed to extend from the flank to the coolant guide surface, and an opening area of the second opening is larger than an opening area of the first opening.
  • the chip discharge capability is high. Since the chips are smoothly discharged out of the machining hole, the drill does not bite the chips or the chips are less likely to damage the inner wall of the machining hole.
  • the coolant is more efficiently injected onto the cutting edge than the conventional gun drill, so that the cooling ability of the cutting edge is high.
  • the gun drill of the present invention has improved chip discharge capacity and cutting edge cooling capacity compared to the conventional technique, the decrease in strength at the tip is minimized, and general drilling is performed. It can handle enough.
  • FIG. 1 is a front view of the single blade gun drill of the present embodiment.
  • 2A is a cross-sectional view taken along the line IIA-IIA in FIG. 2B is a cross-sectional view taken along the line IIB-IIB in FIG. 2C is a cross-sectional view taken along the line IIC-IIC in FIG.
  • FIG. 3 is a side view of the gun drill of FIG. 1 as viewed from the front end side.
  • FIG. 4 is an explanatory diagram for explaining an inclination angle of the coolant guide surface.
  • Drawing 5A is an explanatory view showing the shape of the 1st opening in another embodiment.
  • Drawing 5B is an explanatory view showing the shape of the 1st opening part in another embodiment.
  • FIG. 5C is an explanatory view showing the shape of the 1st opening in another embodiment.
  • Drawing 5D is an explanatory view showing the shape of the 1st opening in another embodiment.
  • FIG. 6 is a diagram illustrating a connection state between the shank portion flow passage and the tip portion flow passage according to another embodiment.
  • FIG. 7A is a front view of the first embodiment.
  • FIG. 7B is a left side view illustrating the shape of the tip of the first embodiment.
  • FIG. 8A is a front view of the second embodiment.
  • FIG. 8B is a left side view illustrating the shape of the tip of the second embodiment.
  • 9A is a front view of Comparative Example 1.
  • FIG. 9B is a left side view showing the shape of the tip of Comparative Example 1.
  • FIG. 9A is a front view of Comparative Example 1.
  • FIG. 9B is a left side view showing the shape of the tip of Comparative Example 1.
  • FIG. 9A is a front view of Comparative Example 1.
  • FIG. 10A is a front view of Comparative Example 2.
  • FIG. 10B is a left side view showing the shape of the tip of Comparative Example 2.
  • 11A is a front view of Comparative Example 3.
  • FIG. 11B is a left side view showing the shape of the tip of Comparative Example 3.
  • FIG. 1 is a front view of the single blade gun drill of this embodiment.
  • 2A to 2C are sectional views of the gun drill
  • FIG. 3 is a side view of the gun drill as viewed from the tip side.
  • the gun drill 1 includes a driver 2, and the driver 2 is formed at the rear end of the gun drill 1.
  • the driver 2 functions as a grip when the gun drill 1 is attached to the machine tool.
  • the gun drill 1 is substantially rod-shaped and includes a shank portion 1A and a tip portion 1B attached to the tip of the shank portion 1A, and one V-shaped chip discharge groove 3 is formed on the outer peripheral surface thereof.
  • the chip discharge groove 3 is linearly formed along the rotation axis CL from the tip of the gun drill 1 to the shank portion 1A. The generated chips are swept away by the coolant flowing in the chip discharge groove 3 and discharged out of the machining hole.
  • a flow passage for circulating coolant is formed inside the gun drill 1, and the flow passage is divided into two parts, a shank portion flow passage 4a and a tip portion flow passage 4b. It consists of
  • the shank portion flow passage 4a is a flow passage that extends to the inside of the driver 2 of the gun drill 1 and is connected to a coolant supply port (supply side opening) formed at an end portion on the side where the driver 2 is provided. It accounts for more than half of the entire road.
  • the range indicated by S1 in FIG. 1 is a portion where the shank portion flow passage 4a is formed. As shown in FIG.
  • the shank portion flow passage 4 a is formed almost entirely along the cross-sectional shape of the shank portion 1 ⁇ / b> A of the gun drill 1.
  • the shank portion 1A has a tubular cross-sectional shape having a substantially constant wall thickness within the range indicated by S1 in FIG.
  • the tip part flow passage 4 b is formed continuously with the shank part flow passage 4 a and is connected to a coolant injection port (injection side opening) formed at the tip of the gun drill 1.
  • the tip portion flow passage 4b is formed in the range indicated by S2 in the gun drill 1.
  • the tip portion flow passage 4b includes a first tip portion flow passage 4b1 connected to a substantially circular first opening (first injection port) and a second opening (curved in a substantially C shape). 2nd tip part flow path 4b2 connected to (2nd injection port).
  • the first tip portion flow passage 4b1 and the second tip portion flow passage 4b2 are formed so as to extend substantially in parallel along the rotation axis of the gun drill 1 without intersecting each other.
  • a rake face 5, a flank face 6, a cutting edge 7, and a coolant guide face 8 are formed at the tip of the gun drill 1.
  • the vicinity of the end of one groove wall of the chip discharge groove 3 functions as the rake face 5, and the generated chip is rounded by the rake face 5 and cut at an appropriate length.
  • the flank 6 is composed of a first flank 6a and a second flank 6b, and a cutting edge 7 is formed at the intersection ridgeline between the flank and the rake face 5.
  • the cutting edge formed at the intersecting ridge line portion between the first flank 6a and the rake face 5 functions as a central edge 7a for cutting the center portion of the machining hole
  • the second flank 6b and the rake face 5 The cutting edge formed in the intersecting ridge line portion functions as an outer peripheral blade 7b that cuts the outer peripheral side of the machining hole.
  • the first flank 6a intersects the second flank 6b at an obtuse angle, and its intersection IS_1 becomes the most distal end of the gun drill 1, and the rear end of the gun drill 1 increases as the distance from the intersection IS_1 increases. Inclined to the side. Further, the intersecting portion IS_1 is also inclined to the rear end side of the gun drill 1 with the intersection IS_2 between the center blade 7a and the outer peripheral blade 7b as a vertex. In other words, this will be described with reference to FIG. 3. The intersection IS_1 is inclined so as to go to the back side of the drawing as it is away from the intersection IS_2.
  • first flank 6a is inclined so as to go to the back side of the paper as it gets away from the intersection IS_1 with the second flank 6b.
  • first flank 6a is inclined in this way, a space is secured between the machining hole bottom and the first flank 6a during machining.
  • the second flank 6b is also inclined so as to go to the back side of the page as the distance from the intersection IS_1 with the first flank 6a increases.
  • intersection IS_1 between the first flank 6a and the second flank 6b is formed at a position deviated from the rotation axis CL of the gun drill 1. Therefore, the center blade 7a and the outer peripheral blade 7b intersect at an obtuse angle, and these intersections IS_2 are also necessarily located at a position deviated from the rotation axis CL of the gun drill 1.
  • the coolant guide surface 8 intersects the flank 6a at an obtuse angle, and also intersects the wall surface 5b of the chip discharge groove 3 that does not function as the rake surface 5. In other words, the coolant guide surface 8 is inclined so as to go to the back side of the paper surface as the distance from the intersection IS_3 with the flank 6a increases. In the present embodiment, the coolant guide surface 8 is a flat surface.
  • Chamfering is applied to the edge of the tip of the gun drill 1. By chamfering the edge, the portion is difficult to chip.
  • the first opening 9 a is formed in a substantially circular shape and is formed in the flank 6, and in the direction of rotation of the gun drill about the rotation axis CL, the first opening 9 a is It is formed in front of the second opening 9b.
  • the 1st opening part 9a is arrange
  • the first opening 9a is a plane in contact with the outer end of the outer peripheral blade 7b (a plane perpendicular to a straight line passing through the rotation axis CL and the outer end of the outer peripheral blade 7b) G in the flank 6; These are formed only in a region parallel to the plane G and between the plane F including the rotation axis CL.
  • the 1st opening part 9a is arrange
  • the shape of the second opening 9b is such that the second opening 9b extends along the circumferential direction around the rotation axis CL, and has an inner diameter side that is a concave curved curve toward the outer circumference. This part is composed of a curved curve. That is, when a circle with a predetermined diameter is moved in the circumferential direction along a circle with a predetermined radius centered on the rotation axis CL, it substantially coincides with the locus drawn by the circle with the predetermined diameter.
  • the second opening 9b is formed across the first flank 6a and the coolant guide surface 8, and does not extend to the cutting edge 7 side of the virtual plane F.
  • the opening area of the second opening 9b is larger than the opening area of the first opening 9b.
  • FIG. 2C is a sectional view taken along the line IIC-IIC in FIG.
  • the shank portion flow passage 4a and the tip portion flow passage 4b are on the supply port side of the tip portion flow passages 4b1 and 4b2 when viewed from the direction of the rotation axis CL.
  • They are in a positional relationship in which they are respectively included inside the outline of the opening on the injection port side of the shank portion flow passage 4a.
  • the pressure loss generated when the coolant moves from the shank portion flow passage 4a to the tip portion flow passage 4b is minimized. Can be suppressed.
  • a part of the second opening 9b extends from the first flank 6a to the coolant guide surface 8, so that the energy loss of the coolant flowing through the chip discharge groove 3 is minimized. become. That is, in the conventional gun drill, the coolant injected from the injection port once collides with the bottom of the machining hole and then flows into the chip discharge groove. Therefore, when the coolant collided with the bottom of the machining hole, a part of the energy that the coolant had was lost, and as a result, the flow rate of the coolant passing through the chip discharge groove was reduced.
  • the opening (injection port) is formed also in the coolant guide surface 8, the coolant injected from there once collides with the hole bottom of the machining hole. Although there is no change until now, a large space near the coolant guide surface 8 is secured, so that a large amount of coolant is guided to the chip discharge groove 3 with minimal energy loss. Therefore, the coolant flows through the chip discharge groove 3 at a larger flow rate than in the past.
  • the cooling effect of the coolant is enhanced by forming a part of the second opening 9b to extend to the coolant guide surface 8. That is, in the case of the conventional injection method, when passing through a narrow space, the coolant receives heat from the bottom of the processing hole where the coolant has become hot, and the coolant temperature has already risen before the cutting edge is cooled.
  • a large amount of coolant injected from the second opening 9b formed in the coolant guide surface 8 into a wide space is applied to the cutting edge 7 from the chip discharge groove 3 side. Therefore, the temperature rise of the coolant is suppressed and the cooling effect of the coolant is enhanced.
  • the second opening 9 b formed in the coolant guide surface 8 is located closest to the cutting edge 7 in the forward direction of the cutting edge 7. Accordingly, the amount of coolant directly applied to the rake face 5 is increased, and the cooling effect of the cutting edge 7 is increased. Furthermore, the second opening 9b formed in the coolant guide surface 8 is positioned farther from the machining hole bottom than the conventional gun drill, and the coolant guide surface 8 is open toward the chip discharge groove 3. Therefore, the rake face that rotates before the sprayed coolant reaches the bottom of the machining hole can move to the coolant arrival point, and the frequency at which the coolant directly collides with the rake face 5 is greatly increased. For this reason, the gun drill 1 of the present embodiment has a higher cooling effect than the conventional gun drill.
  • the coolant sprayed from here is from the side opposite to the second opening 9b across the cutting edge 7, that is, the flank 6 side. To the cutting edge 7 directly.
  • the coolant is applied in a large amount to the cutting edge 7 from two different directions, so that the temperature of the cutting edge 7 of the gun drill 1 of the present embodiment is less likely to rise than the conventional gun drill.
  • the second opening 9b is formed close to the coolant guide surface 8 side, and the first opening 9a is formed only in the flank 6 so that the space between the second opening 9b and the first opening 9a is increased. A sufficient wall thickness can be secured.
  • the gun drill 1 can have a rigidity that is applicable to cutting under normal cutting conditions.
  • FIG. 4 is an explanatory diagram for explaining the inclination angle of the coolant guide surface.
  • the coolant guide surface 8 when the coolant guide surface 8 is viewed in parallel to the center blade 7a, that is, the center blade 7a, it is 30 ° or more and 45 ° or less with respect to the straight line F1 orthogonal to the rotation axis CL. It is preferable to be formed so as to intersect within a range. That is, when the angle ⁇ in FIG. 4 is 30 ° or more and 45 ° or less, the coolant is more effectively guided to the chip discharge groove 3.
  • the gun drill of the present invention includes not only the above-described embodiment but also various other ones.
  • the first opening has a triangular shape (see FIG. 5A), a substantially triangular shape with rounded corners (see FIG. 5B), a semicircle (see FIG. 5C), and an arcuate shape (see FIG. 5D). ) Etc. are possible. That is, as long as it is formed only in the flank 6, the first opening 9 a may have any shape. Naturally, the flow rate of the coolant increases as the area of the first opening 9a increases. The shape of the 1st opening part 9a is adjusted so that the coolant which injected and turned up at the hole bottom of the processing hole may reach the cutting blade 7 in a larger amount.
  • a part of the tip portion flow passage 4b when viewed from the direction of the rotation axis CL, a part of the tip portion flow passage 4b can be formed to protrude outside the shank portion flow passage 4a. That is, as shown in FIG. 6, it is also possible to connect the tip part flow passages 4b1 and 4b2 so that a part of the opening part protrudes outside the opening part of the shank part flow passage 4a. In this case, as a matter of course, part of the openings 9a and 9b is formed so as to protrude from the extended line of the shank portion flow passage 4a.
  • the coolant flow rate is increased as compared with the conventional single-blade gun drill, but the coolant flow rate is decreased as compared with the above-described embodiment.
  • the first flank 6a is a plane, but it may be formed as two intersecting planes or curved surfaces. That is, for example, on the side opposite to the cutting edge 7 of the virtual plane F, a larger space between the first flank 6a and the machining hole bottom may be secured.
  • Example 2 when viewed from the direction of the rotation axis CL, the edge portion of the tip portion flow passage is formed to protrude outside the shank portion flow passage.
  • the opening 109a formed across the first flank 6a and the coolant guide surface 8 is formed in a circular shape instead of a curved shape as in the first embodiment. Further, the size of the opening 109b is smaller than the size of the opening 109a.
  • a single opening 110 having a larger area than the second opening 9b of Example 1 and extending in the circumferential direction is formed only in the first flank 6a.
  • the second opening 9b having the same shape as that of Example 1 is formed in the same region as that of Example 1. However, the circular opening having the same shape as the first opening 9a of Example 1 is used.
  • 111 is formed across both of the regions of the first flank 6 a divided into two by the virtual plane F.
  • Example 1 (see FIGS. 7A and B): Diameter 6 mm Coolant supply pressure 5 MPa Area of the first opening 0.665mm 2 Area of second opening 2.015mm 2 Length from the front end to the rear end 200mm Material Cemented carbide
  • Example 2 (see FIGS. 8A and 8B): Diameter 6 mm Coolant supply pressure 5 MPa Area of the first opening 0.665mm 2 Area of second opening 2.015mm 2 Length from the front end to the rear end 200mm Material Cemented carbide Comparative Example 1 (see FIGS.
  • Example 1 As shown in Table 1, when Example 1 and Comparative Example 1 are compared, the area of the opening of Comparative Example 1 is 85% of Example 1, whereas the flow rate is 79% of Example 1. It has become. This indicates that the injection performance of the coolant of Example 1 has improved beyond the degree of increase in flow rate due to a simple increase in the opening area.
  • Example 1 when Example 1 is compared with Comparative Example 2, the flow rate of Comparative Example 1 is only 84% of Example 1 although the area of the opening is about 9% larger than Example 1. ing. In the first embodiment, this means that a part of the second opening is formed on the coolant guide surface, and the formation of the first opening on the first flank produces a synergistic effect and the injection performance. It shows that improve.
  • Example 1 Regarding each single-blade gun drill cutting edge temperature, as shown in Table 1, the temperature of the cutting edge of Example 1 was the lowest, indicating the high cooling performance of Example 1.
  • the torsional rigidity of Example 1 is slightly larger than that of Comparative Example 1 and smaller than that of Comparative Example 2. However, the torsional rigidity of Example 1 is larger than that of Comparative Example 1 having a torsional rigidity having a practically no problem. Has been shown to have a sufficient size.

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

Abstract

L'invention concerne un foret à canon. Une face de coupe (5), une première face de dépouille (6a), une seconde face de dépouille (6b), une arête tranchante (7), et une face (8) de guidage de fluide de refroidissement sont formées sur une partie extrémité avant du foret à canon (1) sensiblement en forme de tige et dans lequel sont formés un passage (4a) d'écoulement de partie queue dans la partie interne duquel circule un fluide de refroidissement, et un passage (4b) d'écoulement de partie bout. Une première ouverture (9a) sensiblement de forme circulaire consistant en une ouverture d'injection du fluide de refroidissement, est formée à l'intérieur de la première face de dépouille (6a). Une seconde ouverture (9b) consistant en une autre ouverture pour fluide de refroidissement, est formée de façon à chevaucher la première face de dépouille (6a) et la face (8) de guidage de fluide de refroidissement. La surface de la seconde ouverture est plus grande que celle de la première ouverture.
PCT/JP2011/059662 2010-04-19 2011-04-19 Foret à canon Ceased WO2011132686A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2010096253A JP2013139059A (ja) 2010-04-19 2010-04-19 １枚刃ガンドリル
JP2010-096253 2010-04-19

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WO2011132686A1 true WO2011132686A1 (fr) 2011-10-27

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WO (1) WO2011132686A1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014147240A1 (fr) * 2013-03-21 2014-09-25 Gühring KG Outil de perçage multi-taillants à conduits de refroidissement intérieurs
US20150217383A1 (en) * 2012-08-24 2015-08-06 Botek Praezisionsbohrtechnik Gmbh Single-lip drill
US20150321267A1 (en) * 2013-01-29 2015-11-12 Osg Corporation Drill
US20160031016A1 (en) * 2013-03-26 2016-02-04 Osg Corporation Three-bladed drill with cutting fluid supply hole
CN105904004A (zh) * 2016-06-23 2016-08-31 重村钢模机械工业（苏州）有限公司 一种枪钻
CN106964802A (zh) * 2017-05-09 2017-07-21 山西平阳重工机械有限责任公司 小直径深孔扩孔方法及其刀具
CN107206510A (zh) * 2015-02-13 2017-09-26 博泰克精密钻孔技术有限公司 单刃深孔钻
US10814406B1 (en) * 2019-04-24 2020-10-27 Raytheon Technologies Corporation Internal cooling passages for rotating cutting tools

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6594473B2 (ja) * 2018-03-29 2019-10-23 みやび建設株式会社 ドリル取付治具、ドリル装置形成機構、及びドリル装置
CN114083001B (zh) * 2021-10-20 2022-12-30 厦门金鹭特种合金有限公司 一种叠层材料薄板孔加工刀具
JP7544300B1 (ja) 2024-02-06 2024-09-03 株式会社タンガロイ ボディ及び切削工具

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Publication number Priority date Publication date Assignee Title
JPS52136488A (en) * 1976-05-10 1977-11-15 Sumitomo Electric Ind Ltd Gun drill
JPS5541285U (fr) * 1978-09-11 1980-03-17
JP2003165010A (ja) * 2001-11-29 2003-06-10 Toshiba Tungaloy Co Ltd ソリッドガンドリル
JP2004160651A (ja) * 2002-11-11 2004-06-10 Ford Global Technologies Llc ガンドリル
JP2005001082A (ja) * 2003-06-13 2005-01-06 Mitsubishi Materials Corp ドリル

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52136488A (en) * 1976-05-10 1977-11-15 Sumitomo Electric Ind Ltd Gun drill
JPS5541285U (fr) * 1978-09-11 1980-03-17
JP2003165010A (ja) * 2001-11-29 2003-06-10 Toshiba Tungaloy Co Ltd ソリッドガンドリル
JP2004160651A (ja) * 2002-11-11 2004-06-10 Ford Global Technologies Llc ガンドリル
JP2005001082A (ja) * 2003-06-13 2005-01-06 Mitsubishi Materials Corp ドリル

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150217383A1 (en) * 2012-08-24 2015-08-06 Botek Praezisionsbohrtechnik Gmbh Single-lip drill
US9669474B2 (en) * 2012-08-24 2017-06-06 Botek Praezisionsbohrtechnik Gmbh Single-lip drill
US9604286B2 (en) 2013-01-29 2017-03-28 Osg Corporation Drill
US20150321267A1 (en) * 2013-01-29 2015-11-12 Osg Corporation Drill
EP2952278A4 (fr) * 2013-01-29 2016-09-14 Osg Corp Foret
WO2014147240A1 (fr) * 2013-03-21 2014-09-25 Gühring KG Outil de perçage multi-taillants à conduits de refroidissement intérieurs
US9636756B2 (en) 2013-03-21 2017-05-02 Guehring Kg Multi-lip drilling tool with internal cooling ducts
US20160031016A1 (en) * 2013-03-26 2016-02-04 Osg Corporation Three-bladed drill with cutting fluid supply hole
US9623490B2 (en) * 2013-03-26 2017-04-18 Osg Corporation Three-bladed drill with cutting fluid supply hole
EP2979794A4 (fr) * 2013-03-26 2016-11-16 Osg Corp Foret à trois arêtes avec trou d'alimentation en fluide de coupe
CN107206510A (zh) * 2015-02-13 2017-09-26 博泰克精密钻孔技术有限公司 单刃深孔钻
CN107206510B (zh) * 2015-02-13 2019-06-11 博泰克精密钻孔技术有限公司 单刃深孔钻
CN105904004A (zh) * 2016-06-23 2016-08-31 重村钢模机械工业（苏州）有限公司 一种枪钻
CN106964802A (zh) * 2017-05-09 2017-07-21 山西平阳重工机械有限责任公司 小直径深孔扩孔方法及其刀具
US10814406B1 (en) * 2019-04-24 2020-10-27 Raytheon Technologies Corporation Internal cooling passages for rotating cutting tools

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