WO2021210076A1 - 穴あけ装置および穴あけ方法 - Google Patents

穴あけ装置および穴あけ方法 Download PDF

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Publication number
WO2021210076A1
WO2021210076A1 PCT/JP2020/016467 JP2020016467W WO2021210076A1 WO 2021210076 A1 WO2021210076 A1 WO 2021210076A1 JP 2020016467 W JP2020016467 W JP 2020016467W WO 2021210076 A1 WO2021210076 A1 WO 2021210076A1
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WIPO (PCT)
Prior art keywords
drill
drilling
axis
discharge
gas
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/JP2020/016467
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English (en)
French (fr)
Japanese (ja)
Inventor
慧 藤川
山田　毅
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Mitsubishi Heavy Industries Ltd
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Mitsubishi Heavy Industries Ltd
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Filing date
Publication date
Application filed by Mitsubishi Heavy Industries Ltd filed Critical Mitsubishi Heavy Industries Ltd
Priority to JP2022514906A priority Critical patent/JP7331250B2/ja
Priority to PCT/JP2020/016467 priority patent/WO2021210076A1/ja
Publication of WO2021210076A1 publication Critical patent/WO2021210076A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B47/00—Constructional features of components specially designed for boring or drilling machines; Accessories therefor
    • B23B47/34—Arrangements for removing chips out of the holes made; Chip- breaking arrangements attached to the tool
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working

Definitions

  • the present disclosure relates to a drilling device and a drilling method for drilling a portion to be machined in which a plurality of materials to be machined are stacked.
  • Patent Document 1 discloses that a vacuum source is connected to an exhaust channel of a chamber formed by a main body portion fixed to a work piece, and cutting debris is discharged together with a fluid in the chamber through the exhaust channel.
  • Patent Document 1 by closing the inlet opening into which the cutting tool is inserted into the main body with a disk, the airflow flows in from the supply channel, and the cutting debris is discharged from the exhaust channel together with the airflow circulated in a cyclone shape in the chamber. Discharge.
  • Patent Document 1 since the cutting piece is discharged from the exhaust channel together with the air flow circulated in the chamber in a cyclone shape, the cutting piece having a relatively short length existing in the chamber without adhering to the cutting tool is discharged from the exhaust channel. Can be discharged. However, in Patent Document 1, it is difficult to reliably remove a relatively long cutting piece adhering to a groove of a cutting tool. Therefore, the cutting tool operates with a relatively long cutting piece attached, and the cutting piece may damage the workpiece.
  • the present disclosure has been made in view of such circumstances, and it is possible to remove the cutting debris adhering to the groove portion of the drill having the drilling portion and prevent the work material from being damaged by the cutting debris. It is an object of the present invention to provide a drilling device and a drilling method.
  • the drilling device is a drilling device for drilling a portion to be machined in which a plurality of materials to be machined are stacked, and is formed in a tubular shape extending along an axis and is the first of the workpieces.
  • a first support that supports one surface
  • a second support that is formed in a tubular shape that extends along the axis and supports the second surface of the workpiece, and a hole that drills the workpiece.
  • the drilling portion includes a drill having a circular cross-sectional shape orthogonal to the axis and a groove formed on the outer peripheral surface that swivels along the axis, and the drill is rotated around the axis.
  • the first support has a drive mechanism for moving the inside of the first support along the axis so that the drill comes into contact with or separates from the first surface of the work piece.
  • a discharge portion that discharges a gas for removing cutting chips generated by drilling a portion to be machined by the drill portion from the groove of the drill toward a predetermined position on the outer peripheral surface of the drill, and the cutting. It has a suction unit that sucks dust together with gas, and the discharge unit has a gas in a direction that coincides with the tangential direction of the outer peripheral surface that passes through the predetermined position when the drill is viewed in a plan view along the axis. Is discharged.
  • the drilling method is a drilling method for drilling a portion to be machined in which a plurality of materials to be machined are stacked, and is described by a first support formed in a tubular shape extending along an axis.
  • the drilling step comprises a drilling step of drilling a portion to be machined by a drill having a circular shape and a groove formed on an outer peripheral surface that swivels along the axis, and the drilling step is centered on the axis.
  • the drill is rotated and the inside of the first support is moved along the axis so as to come into contact with the first surface of the workpiece so as to be in contact with the first surface of the workpiece. Is discharged from the discharge portion of the first support toward a predetermined position on the outer peripheral surface of the drill, and the gas is discharged to the suction portion of the first support. The cutting chips are sucked together with the gas, and the discharge unit discharges the gas in a direction corresponding to the tangential direction of the outer peripheral surface passing through the predetermined position when the drill is viewed in a plan view along the axis.
  • a drilling device and a drilling method capable of removing cutting chips adhering to a groove portion of a drill having a drilling portion and preventing the work material from being damaged by the cutting chips.
  • FIG. 3 is a cross-sectional view taken along the line AA of the drilling device shown in FIG. It is a partial enlarged view in the vicinity of the processed portion of the drilling apparatus shown in FIG. It is a flowchart which shows the drilling method executed by the drilling apparatus which concerns on 1st Embodiment of this disclosure. It is a vertical cross-sectional view which shows the drilling apparatus before performing a support process.
  • FIG. 1 is a perspective view showing a stringer 210 and a clip 220.
  • FIG. 2 is a schematic configuration diagram showing a drilling device 100 according to the first embodiment of the present disclosure.
  • FIG. 3 is a vertical cross-sectional view showing the drilling device 100 according to the first embodiment of the present disclosure.
  • FIG. 4 is a cross-sectional view taken along the line AA of the drilling device 100 shown in FIG.
  • FIG. 5 is a partially enlarged view of the vicinity of the workpiece portion of the drilling device 100 shown in FIG.
  • the vertical cross-sectional view shown in FIG. 3 is a cross-sectional view taken along the line BB of FIG.
  • the white arrows shown in FIGS. 3 to 5 indicate the air flow direction.
  • the drilling device 100 of the present embodiment is a device for drilling a portion to be machined in which a plurality of materials to be machined are stacked.
  • examples of the plurality of work materials include stringers 210 and clips 220 used in aircraft.
  • the stringer 210 is a long member arranged along the axial direction of the aircraft.
  • the clip 220 is a member for fastening the stringer 210 to a frame (not shown) that holds the fuselage of the aircraft divided into panels in a cylindrical shape.
  • the stringer 210 and the clip 220 are made of, for example, an aluminum alloy.
  • the drilling device 100 of the present embodiment drills a hole in a work portion 300 in which a stringer 210 and a clip 220 are overlapped.
  • the processed portion 300 is a portion in which the stringer 210 and the clip 220 are overlapped and integrated, and the insertion hole 303 is formed by the drilling process by the drilling device 100.
  • a rivet (not shown) formed of an aluminum alloy is inserted into the through hole formed in the workpiece 300 by the drilling process.
  • the rivet device (not shown) fastens the stringer 210 and the clip 220 via the rivet by deforming the rivet inserted in the through hole.
  • a single clip 220 is shown in FIG. 1, a plurality of clips 220 are attached to the stringer 210 at a plurality of locations in the length direction.
  • the stringer 210 and the clip 220 formed of the aluminum alloy are adopted as the work material to be drilled by the drilling device 100, but other embodiments may be used.
  • a metal material other than the aluminum alloy or a material other than the metal material may be adopted.
  • the drilling device 100 of the present embodiment includes an upper clamp (first support) 10, a lower clamp (second support) 20, a drilling unit (drilling portion) 30, and a drilling unit (drilling portion) 30.
  • a suction blower 40, a discharge blower 50, an injection blower (injection unit) 60, and a control unit 70 are provided.
  • the control unit 70 and the other units are electrically connected so as to be able to communicate with each other via the signal line 101.
  • the drilling device 100 of the present embodiment drills a hole in a work portion 300 in which a work material composed of a stringer 210 and a clip 220 is overlapped.
  • the drilling device 100 cuts the upper surface 301 of the workpiece 300 by the drilling unit 30 arranged on the upper surface (first surface) 301 side of the workpiece 300, and reaches the lower surface (second surface) 302 of the workpiece 300.
  • the axis X shown in FIG. 3 is a straight line orthogonal to the upper surface 301 and the lower surface 302 of the workpiece 300.
  • the upper clamp 10 is a member formed in a cylindrical shape extending along the axis X.
  • the upper clamp 10 includes an upper moving mechanism (not shown) that moves so as to come into contact with or separate from the upper surface 301 of the workpiece 300 along the axis X in response to a control signal from the control unit 70.
  • the upper clamp 10 has a cylindrical portion 11 having an inner peripheral surface 11a extending along the axis X, and is connected to the tubular portion 11 so as to approach the connecting position with the tubular portion 11 and the outer diameter and the outer diameter It is provided with a diameter-reduced portion 12 whose inner diameter is reduced.
  • the inner and outer diameters of the reduced diameter portion 12 are reduced in order to avoid interference with the clip 220, and the reduced diameter portion 12 has a cylindrical shape extending along the axis X.
  • the upper clamp 10 supports the upper surface 301 of the workpiece 300 by bringing the lower end of the tubular portion 11 into contact with the upper surface 301 of the workpiece 300.
  • the upper clamp 10 has a discharge port (discharge part) 13 that discharges air (gas) toward the inside of the cylinder portion 11 and a suction port (suction) that sucks cutting chips 400 generated by drilling by the drilling unit 30 together with air. Part) 14. Details of the discharge port 13 and the suction port 14 will be described later.
  • the lower clamp 20 is a member formed in a cylindrical shape extending along the axis X.
  • the lower clamp 20 includes a lower moving mechanism (not shown) that moves along the axis X so as to come into contact with or separate from the lower surface 302 of the workpiece 300 in response to a control signal from the control unit 70.
  • the lower clamp 20 supports the lower surface 302 of the workpiece 300 by bringing the upper end into contact with the lower surface 302 of the workpiece 300.
  • the drilling unit 30 is a mechanism for drilling a hole 300 in a state where the upper surface 301 is supported by the upper clamp 10 and the lower surface 302 is supported by the lower clamp 20.
  • the drilling unit 30 forms an insertion hole 303 for inserting a fastener such as a rivet or a bolt into the workpiece 300 by performing the drilling process. Further, when the insertion hole 303 is formed, the workpiece 300 is cut to generate cutting chips 400.
  • the cutting chips 400 have a length of about 30 mm.
  • the drilling unit 30 has a drill 31 formed so as to extend along the axis X, and a drive mechanism 32 for rotating the drill 31 around the axis X.
  • the drive mechanism 32 drills inside the tubular portion 11 and the reduced diameter portion 12 along the axis X so as to contact or separate from the upper surface 301 of the workpiece 300 in response to the control signal transmitted from the control unit 70. Move 31.
  • the drill 31 has a circular cross-sectional shape (cross-sectional shape of the outer shape excluding the groove 31a) orthogonal to the axis X, and a pair of grooves 31a that swivel along the axis X are formed on the outer peripheral surface. It is a member formed in a substantially rod shape.
  • the drill 31 is driven by the drive mechanism 32 and rotates around the axis X along the clockwise rotation direction RD.
  • the suction blower 40 is a device in which the suction port 14 serves as a suction source for sucking the cutting chips 400 together with air.
  • the suction blower 40 is connected to the suction port 14 of the upper clamp 10 via the suction pipe 41.
  • the suction blower 40 sucks air through a filter (not shown) and discharges it into the atmosphere after passing through the filter, thereby guiding the air existing inside the tubular portion 11 of the upper clamp 10 to the suction port 14. Generate airflow.
  • the suction blower 40 has a suction capacity of, for example, 3.5 m 3 / min.
  • the discharge blower 50 is a device that generates an air flow of air discharged from the discharge port 13.
  • the discharge blower 50 is connected to the discharge port 13 of the upper clamp 10 via the discharge pipe 51.
  • the discharge blower 50 releases the solenoid valve and discharges compressed air to blow air to the discharge port 13 via the discharge pipe 51.
  • the injection blower 60 is a device that injects air (gas) for removing cutting chips 400 of the machined portion 300 adhering to the drilling unit 30 at a retracted position where the drilling unit 30 is retracted from the machined portion 300. ..
  • the injection blower 60 is connected to the injection port 61 via the injection pipe 62 shown in FIG.
  • the jet port 61 has an injection flow path 61a having a linearly extending axis Y1 as a central axis and a cross-sectional shape orthogonal to the axis Y1 having a circular cross section.
  • the air flowing through the jet flow path 61a is jetted toward the removal position P4 of the outer peripheral surface 31b of the drill 31.
  • the direction in which the injection port 61 discharges air is preferably the direction along the axis Y1 and coincides with the helix angle ⁇ of the groove 31a of the drill 31.
  • the control unit 70 includes an upper moving mechanism (not shown) of the upper clamp 10, a lower moving mechanism (not shown) of the lower clamp 20, a drilling unit 30, a suction blower 40, a discharge blower 50, and an injection blower 60. Is a device that controls.
  • the control unit 70 is composed of, for example, a CPU (Central Processing Unit), a RAM (Random Access Memory), a ROM (Read Only Memory), a computer-readable storage medium, and the like. Then, as an example, a series of processes for realizing various functions are stored in a storage medium or the like in the form of a program.
  • the control unit 70 realizes various functions when the CPU reads a program into a RAM or the like and executes information processing / arithmetic processing.
  • the upper clamp 10 has a discharge port 13 that discharges the air (gas) discharged by the discharge blower 50 toward the inside of the cylinder portion 11, and a drill 31 that discharges the air discharged from the discharge port 13. It has a suction port 14 for sucking together with the cutting chips 400 generated by cutting the workpiece 300.
  • the discharge port 13 has a linearly extending axis Y as a central axis, and has a circular cross-sectional shape (for example, a diameter of 0.5 mm or more and 1.5 mm) perpendicular to the axis Y.
  • the discharge flow path 13a (below) is provided inside.
  • the air flowing through the discharge flow path 13a flows from the discharge position P1 where the discharge flow path 13a and the inner peripheral surface 11a of the tubular portion 11 intersect, to the inner peripheral surface 11a of the tubular portion 11 of the upper clamp 10 and the outer peripheral surface of the drill 31. It is discharged to the annular space S1 around the axis X formed between the 31b and 31b.
  • the pressure of the air discharged from the discharge port 13 to the annular space S1 is set to, for example, 3 kg / cm 2 or more and 7 kg / cm 2 or less.
  • the cross-sectional shape orthogonal to the axis Y of the discharge port 13 is circular, but other embodiments may be used.
  • it may be any shape different from the circular shape such as an ellipse.
  • the annular space S1 is a space formed between the inner peripheral surface 11a of the cylindrical tubular portion 11 having a radius R1 centered on the axis X and the outer peripheral surface 31b having a radius R2 of the drill 31.
  • the radius R1 is set to, for example, 7.5 mm or more and 9 mm or less.
  • the radius R2 is set to, for example, 2.5 mm or more and 3.5 mm or less.
  • the discharge port 13 discharges the air supplied from the discharge blower 50 through the discharge pipe 51 from the discharge position P1 toward the removal position (predetermined position) P2 of the outer peripheral surface 31b of the drill 31.
  • the outer peripheral surface 31b of the drill 31 means a surface through which the position (maximum outer diameter position) where the distance from the axis X is the longest passes when the drill 31 is rotated around the axis X.
  • the position having the radius R2 with respect to the axis X is the maximum outer diameter position.
  • FIG. 4 is a cross-sectional view taken along the line AA of the drilling device 100 shown in FIG. 3, which is a plan view of the drill 31 along the axis X.
  • the discharge port 13 is in the tangential direction of the outer peripheral surface 31b passing through the removal position P2 of the outer peripheral surface 31b of the drill 31 when the drill 31 is viewed in a plane along the axis X. It is also possible to take the form of discharging air in the direction corresponding to the TD.
  • the discharge port 13 is arranged so that the extension line of the axis Y, which is the central axis of the discharge flow path 13a, is in contact with the outer peripheral surface 31b at the removal position P2. That is, the discharge port 13 is installed so that the tangent line of the removal position P2 is arranged on the extension line of the axis Y.
  • the direction in which the discharge port 13 discharges air is set to match the tangential direction TD of the outer peripheral surface 31b passing through the removal position P2, but other embodiments may be used.
  • the direction in which the discharge port 13 discharges air from the discharge position P1 is the tangential direction of the outer peripheral surface 31b passing through the removal position P2 within a predetermined angle range (for example, ⁇ 5 ° to 5 °) with respect to the tangential direction TD. It may be different from the direction that coincides with TD.
  • the rotation direction RD at which the drill 31 rotates is the same direction as the tangential direction TD that coincides with the discharge direction of the air discharged from the discharge position P1.
  • the drive mechanism 32 of the drilling unit 30 rotates the drill 31 at the removal position P2 so that the outer peripheral surface 31b moves in the same direction as the air discharge direction.
  • the discharge speed of the air discharged from the discharge port 13 may be set in a range of 10 times or more and 25 times or less of the moving speed of the drill 31 along the rotation direction RD.
  • the discharge position P1 at which the discharge port 13 discharges air is a position separated by a length L1 from the upper surface 301 of the workpiece 300 along the axis X.
  • the removal position P2 on the outer peripheral surface 31b of the drill 31 is a position separated by a length L2 from the upper surface 301 of the workpiece 300 along the axis X.
  • the processed portion 300 refers to a portion where the stringer 210 and the clip 220 are drilled, but the case is not limited to the case where the two members are overlapped, and three or more workpieces may be overlapped.
  • the removal position P2 is arranged at a lower position than the discharge position P1 in the height direction along the axis X.
  • the discharge port 13 discharges air from the discharge position P1 in a direction intersecting the upper surface 301 of the workpiece 300.
  • the direction in which the discharge port 13 discharges air is a direction along the axis Y, which coincides with the helix angle ⁇ of the groove 31a of the drill 31.
  • the helix angle ⁇ is the inclination angle of the groove 31a with respect to the direction along the axis X, which is the axial direction of the drill 31.
  • the helix angle ⁇ is set to, for example, 20 ° or more and 40 ° or less.
  • the direction in which the discharge port 13 discharges air is set to match the helix angle ⁇ of the groove 31a, but other embodiments may be used.
  • the direction in which the discharge port 13 discharges air may be different from the helix angle ⁇ of the groove 31a in a predetermined angle range (for example, an angle range of ⁇ -5 ° or more and ⁇ + 5 ° or less).
  • the suction port 14 has a cross-sectional shape of a cross section orthogonal to the axis Z, with the axis Z intersecting the axis X which is the central axis of the drill 31 and extending linearly as the central axis.
  • a suction flow path 14a having a circular shape (for example, a diameter of 10 mm or more and 14 mm or less) is formed.
  • the axis Z is an axis that serves as the central axis of the suction port 14. The air flowing through the suction flow path 14a is sucked from the annular space S1 to the suction position P3 where the suction flow path 14a and the inner peripheral surface 11a of the tubular portion 11 intersect.
  • the air and cutting chips 400 guided to the suction flow path 14a at the suction position P3 are guided from the suction flow path 14a to the suction blower 40 via the suction pipe 41.
  • the height of the suction position P3 shown in FIG. 5 along the axis X from the upper surface 301 is set so that the suction port 14 does not interfere with the clip 220.
  • the suction position P3 of the suction port 14 is a position separated by a length L3 from the upper surface 301 of the workpiece 300 along the axis X. Since the length L3 is longer than the length L1, the suction position P3 is arranged at a higher position than the discharge position P1 in the height direction along the axis X. The discharge port 13 is arranged at a position higher than the discharge position P1 in order to avoid interference with the clip 220.
  • the suction position P3 at which the suction port 14 sucks the cutting chips 400 together with the air is arranged at an angle ⁇ 2 from the removal position P2 in the circumferential direction around the axis X.
  • the angle ⁇ 2 is preferably set to, for example, 90 ° or more and 180 ° or less. That is, it is preferable that the suction position P3 is arranged within a half circumference from the removal position P2 in the circumferential direction around the axis X.
  • the discharge position P1 at which the discharge port 13 discharges air is arranged at an angle ⁇ 1 from the removal position P2 in the circumferential direction around the axis X.
  • the angle obtained by adding the angle ⁇ 1 and the angle ⁇ 2 is preferably set to, for example, 90 ° or more and 270 ° or less.
  • FIG. 6 is a flowchart showing a drilling method executed by the drilling device 100 according to the present embodiment.
  • FIG. 7 is a vertical cross-sectional view showing the drilling device 100 before executing the support step.
  • FIG. 8 is a vertical cross-sectional view showing the drilling device 100 after executing the support step.
  • FIG. 9 is a vertical cross-sectional view showing the drilling device 100 in the drilling step.
  • step S101 (supporting step), the upper moving mechanism (not shown) of the upper clamp 10 is controlled by the control signal transmitted from the control unit 70, and the lower end of the tubular portion 11 is close to the upper surface 301 of the workpiece 300. Move in the direction. The upper clamp 10 moves to a position where the lower end of the tubular portion 11 comes into contact with the upper surface 301 of the workpiece 300 to support the upper surface 301 of the workpiece 300.
  • step S101 the lower moving mechanism (not shown) of the lower clamp 20 is controlled by the control signal transmitted from the control unit 70, and the upper end of the lower clamp 20 is in a direction close to the lower surface 302 of the workpiece 300. Moving. The lower clamp 20 moves to a position where the upper end contacts the lower surface 302 of the workpiece 300 to support the lower surface 302 of the workpiece 300.
  • step S101 the drilling device 100 changes from the state shown in FIG. 7 to the state shown in FIG.
  • step S102 the drill 31 of the drilling unit 30 executes drilling in the workpiece 300 while the workpiece 300 is supported by the upper clamp 10 and the lower clamp 20.
  • the drive mechanism 32 of the drilling unit 30 is controlled by a control signal transmitted from the control unit 70, and moves from the retracted position shown by the solid line in FIG. 8 to the position on the axis X shown by the broken line in FIG.
  • step S102 the drive mechanism 32 of the drilling unit 30 is controlled by the control signal transmitted from the control unit 70.
  • the drilling unit 30 moves inside the reduced diameter portion 12 and the tubular portion 11 of the upper clamp 10 in a direction close to the upper surface 301 of the workpiece 300 (downward direction in FIG. 8) along the axis X, and is shown in FIG. The state shown in 9 is obtained.
  • the drive mechanism 32 rotates the drill 31 along the rotation direction RD about the axis X until the insertion hole 303 is formed in the workpiece 300.
  • the drilling unit 30 When the drilling unit 30 further moves in a direction closer to the upper surface 301 of the workpiece 300, the tip of the drill 31 comes into contact with the upper surface 301 of the workpiece 300, and the drill 31 starts drilling.
  • the drill 31 moves further downward along the axis X while in contact with the workpiece 300, the insertion hole 303 is formed in the workpiece 300 as shown in FIGS. 1 and 5.
  • step S102 the discharge blower 50 is controlled by the control signal transmitted from the control unit 70.
  • the discharge blower 50 supplies air to the discharge port 13 via the discharge pipe 51.
  • the discharge port 13 discharges air for removing the cutting chips 400 generated by the drilling of the workpiece 300 from the groove 31a of the drill 31 toward the removal position P2 of the outer peripheral surface 31b of the drill 31.
  • step S102 the suction blower 40 is controlled by the control signal transmitted from the control unit 70.
  • the suction blower 40 sucks air from the discharge pipe 51 and discharges the cutting chips 400 from the annular space S1 to the suction port 14 together with the air.
  • step S103 the drilling unit 30 is moved upward along the axis X from the position where the drill 31 is inserted into the insertion hole 303 in response to the formation of the insertion hole 303 in the workpiece 300. It is moved and retracted from the work piece 300. The drilling unit 30 moves to a position on the axis X shown by a broken line in FIG. 8, and then moves to a retracted position shown by a solid line in FIG.
  • step S104 injection step
  • air for removing cutting chips 400 from the groove 31a of the drill 31 from the injection port 61 toward the outer peripheral surface 31b of the drill 31. Is injected.
  • the injection step of step S104 may not be executed. Since step S104 is an effective means for removing the cutting debris when the cutting debris is returned to the retracted position while being wound around the trill, when the drill 31 is inside the cylinder portion 11 even if S104 is omitted. It is possible to remove cutting chips.
  • the drilling process for forming the insertion hole 303 in the workpiece 300 is executed.
  • the drilling device 100 of the present embodiment the upper surface 301 of the workpiece 300 on which the stringer 210 and the clip 220 are stacked is supported by the upper clamp 10, and the lower surface 302 of the workpiece 300 is supported by the lower clamp 20. Then, by rotating the drill 31 having the groove 31a formed on the outer peripheral surface 31b around the axis X, the workpiece 300 is drilled. Cutting chips 400 are generated from the workpiece 300 to be cut by the drill 31, and the cutting chips 400 grow along the groove 31a of the drill 31. When the cutting chips 400 grow to a predetermined length or longer, the end portion of the cutting chips 400 protrudes to the outside of the outer peripheral surface 31b of the drill 31.
  • the air for removing the cutting chips 400 generated by the drilling of the workpiece 300 by the drilling unit 30 from the discharge port 13 from the groove 31a of the drill 31 is the outer circumference of the drill 31. It is discharged toward the removal position P2 of the surface 31b.
  • the discharge port 13 discharges air in a direction corresponding to the tangential direction TD of the outer peripheral surface 31b passing through the removal position P2 when the drill 31 is viewed in a plane along the axis X. Therefore, the air discharged from the discharge port 13 is blown to the end portion of the cutting chips 400 protruding outward from the outer peripheral surface 31b of the drill 31.
  • the end portion of the cutting chips 400 is pulled away from the outer peripheral surface 31b of the drill 31, and the cutting chips 400 are separated from the groove 31a of the drill 31.
  • the cutting chips 400 separated from the groove 31a of the drill 31 are sucked by the suction port 14 together with the air discharged from the discharge port 13.
  • the cutting chips 400 adhering to the groove 31a of the drill 31 of the drilling unit 30 are removed by the air discharged from the discharge port 13, so that the groove of the drill 31 is removed. It is possible to prevent the stringer 210 and the clip 220 from being damaged by the cutting chips 400 as they grow with the cutting chips 400 attached to the 31a.
  • the suction position P3 is arranged within a half circumference from the removal position P2 through which the air discharged from the discharge port 13 passes in the circumferential direction around the axis X. Therefore, the air discharged from the discharge port 13 is guided to the suction port 14 together with the cutting chips 400 while holding the velocity component discharged from the discharge port 13 without circling around the axis X.
  • the cutting chips 400 are circulated around the axis X and sucked from the removal position P2 without damaging the workpiece 300.
  • the cutting chips 400 can be guided toward the position P3.
  • the drilling device 100 of the present embodiment since air is discharged from the discharge position P1 in the direction intersecting the upper surface 301, the cutting chips 400 separated from the groove 31a of the drill 31 are guided toward the upper surface 301. Since the cutting chips 400 separated from the groove 31a of the drill 31 are not guided in the direction away from the upper surface 301, it is possible to prevent the cutting chips 400 from being discharged to the outside of the upper clamp 10 without being guided to the suction port 14. ..
  • air is discharged in a direction corresponding to the helix angle ⁇ of the groove 31a of the drill 31. Therefore, the end portion of the cutting chips 400 can be separated from the outer peripheral surface 31b along the direction corresponding to the helix angle ⁇ of the groove 31a of the drill 31, and the cutting chips 400 can be more reliably separated from the groove 31a of the drill 31.
  • the outer peripheral surface 31b of the drill 31 moves in the same direction as the air discharge direction at the removal position P2 through which the air discharged from the discharge port 13 passes. Therefore, it is possible to always apply a force in the direction of separating the cutting chips 400 from the groove 31a to the cutting chips 400 adhering to the grooves 31a of the drill 31, and to promote the separation of the cutting chips 400 from the grooves 31a. Further, since the drill 31 gives the cutting chips 400 a velocity component from the removal position P2 toward the suction port 14, the cutting chips 400 can be more reliably guided to the suction port 14.
  • the drilling unit 30 is retracted from the machined portion 300, and at the retracted position, air is injected toward the outer peripheral surface 31b of the drill 31 to discharge the air from the discharge port 13.
  • the cutting chips 400 that remain in the groove 31a without being removed by air can be removed before the next drilling process is performed.
  • FIG. 11 is a partially enlarged view of the vicinity of the workpiece 300 of the drilling device 100A according to the present embodiment.
  • This embodiment is a modification of the first embodiment, and is the same as that of the first embodiment except for the cases described below, and the description thereof will be omitted below.
  • the discharge port 13 of the drilling device 100 of the first embodiment discharges air from the discharge position P1 in a direction intersecting the upper surface 301 of the workpiece 300.
  • the discharge port 13A of the drilling device 100A of the present embodiment discharges air from the discharge position P1A in a direction parallel to the upper surface 301 of the workpiece 300.
  • the upper clamp 10A of the drilling device 100A of the present embodiment has a discharge port 13A.
  • the discharge port 13A has an axis Y1 extending linearly as a central axis, and has a discharge flow path 13Aa having a circular cross-sectional shape (for example, a diameter of 0.5 mm or more and 1.5 mm or less) in a cross section orthogonal to the axis Y1.
  • a circular cross-sectional shape for example, a diameter of 0.5 mm or more and 1.5 mm or less
  • the air flowing through the discharge flow path 13Aa flows from the discharge position P1A where the discharge flow path 13Aa and the inner peripheral surface 11Aa of the tubular portion 11A intersect, to the inner peripheral surface 11Aa of the tubular portion 11A of the upper clamp 10A and the outer peripheral surface of the drill 31. It is discharged to the annular space S1 around the axis X formed between the 31b and 31b.
  • the pressure of the air discharged from the discharge port 13A to the annular space S1 is set to, for example, 3 kg / cm 2 or more and 7 kg / cm 2 or less.
  • the discharge port 13A discharges the air supplied from the discharge blower 50 through the discharge pipe 51 from the discharge position P1 toward the removal position (predetermined position) P2A of the outer peripheral surface 31b of the drill 31. do.
  • the discharge port 13A discharges air from the discharge position P1 in a direction parallel to the upper surface 301 of the workpiece 300.
  • the drilling device 100A of the present embodiment since air is discharged from the discharge position P1A in the direction parallel to the upper surface 301, the cutting chips 400 separated from the groove 31a of the drill 31 are guided in the direction parallel to the upper surface 301. .. Since the cutting chips 400 separated from the groove 31a of the drill 31 are not directly guided toward the upper surface 301, it is possible to prevent the cutting chips 400 from being directly guided to the upper surface 301 and damaging the upper surface 301.
  • FIG. 12 is a partially enlarged view of the vicinity of the workpiece 300 of the drilling device 100B according to the present embodiment.
  • This embodiment is a modification of the first embodiment, and is the same as that of the first embodiment except for the cases described below, and the description thereof will be omitted below.
  • the upper clamp 10 of the drilling device 100 of the first embodiment includes a single discharge port 13.
  • the upper clamp 10B of the drilling device 100B of the present embodiment includes a discharge port 15 in addition to the discharge port 13.
  • the upper clamp 10B of the drilling device 100B of the present embodiment has a discharge port 15.
  • the discharge port 15 has an axis Z1 extending linearly as a central axis, and has a discharge flow path 15a having a circular cross-sectional shape (for example, a diameter of 0.5 mm or more and 1.5 mm or less) in a cross section orthogonal to the axis Z1.
  • a circular cross-sectional shape for example, a diameter of 0.5 mm or more and 1.5 mm or less
  • the air flowing through the discharge flow path 15a flows from the discharge position P5 where the discharge flow path 15a and the inner peripheral surface 11Ba of the tubular portion 11B intersect, to the inner peripheral surface 11Ba of the tubular portion 11B of the upper clamp 10B and the outer peripheral surface of the drill 31. It is discharged to the annular space S1 around the axis X formed between the 31b and 31b.
  • the pressure of the air discharged from the discharge port 15 to the annular space S1 is set to, for example, 3 kg / cm 2 or more and 7 kg / cm 2 or less.
  • the discharge port 15 discharges air supplied from the discharge blower 50 via the discharge pipe 52 from the discharge position P5 toward the removal position (predetermined position) P6 of the outer peripheral surface 31b of the drill 31. do.
  • the discharge port 15 discharges air from the discharge position P1 in a direction parallel to the upper surface 301 of the workpiece 300.
  • air is discharged from both the discharge port 13 and the discharge port 15 to the outer peripheral surface 31b of the drill 31. Therefore, as compared with the case where air is discharged from a single discharge port, the cutting chips 400 adhering to the groove 31a of the drill 31 can be reliably removed.
  • the cutting chips 400 separated from the groove 31a of the drill 31 are in the direction parallel to the upper surface 301. Be guided. Since the cutting chips 400 separated from the groove 31a of the drill 31 are not directly guided toward the upper surface 301, it is possible to prevent the cutting chips 400 from being directly guided to the upper surface 301 and damaging the upper surface 301.
  • the drilling device 100B of the present embodiment even if the cutting chips 400 are guided to the upper surface 301 by the air discharged from the discharge port 13 toward the upper surface 301, the cutting chips 400 are guided in the direction parallel to the upper surface 301 from the discharge position P5. It is possible to prevent the cutting chips 400 from colliding with the upper surface 301 due to the discharged air.
  • the discharge port 13 of the present embodiment discharges air from the discharge position P1 in a direction intersecting the upper surface 301 of the workpiece 300, but other embodiments may be used. ..
  • air may be discharged from the discharge position P1 in a direction parallel to the upper surface 301 of the workpiece 300.
  • the drilling device (100) described in the embodiment described above is grasped as follows, for example.
  • the drilling apparatus (100) according to the present disclosure is formed in a tubular shape extending along an axis (X) by drilling a work piece (300) in which a plurality of work materials (210, 220) are stacked.
  • the support (20) and the drilling portion (30) for drilling the workpiece are provided, and the drilling portion has a circular cross-sectional shape orthogonal to the axis and swivels along the axis.
  • the axis of the drill (31a) is formed on the outer peripheral surface of the drill (31a) so as to rotate the drill around the axis and contact or separate the drill from the first surface of the workpiece.
  • the first support has a drive mechanism (32) that moves the inside of the first support (10) along the above, and the first support is a cutting debris generated by drilling a portion to be machined by the drilling portion. It has a discharge portion (13) for discharging a gas for removing the gas from the groove of the drill toward a predetermined position on the outer peripheral surface of the drill, and a suction portion (14) for sucking the cutting chips together with the gas. Then, the discharge unit discharges gas in a direction that coincides with the tangential direction of the outer peripheral surface that passes through the predetermined position when the drill is viewed in a plan view along the axis.
  • the first surface of the workpiece in which a plurality of workpieces are stacked is supported by the first support, and the second surface of the workpiece is supported by the second support.
  • a drill having a groove formed on the outer peripheral surface is rotated around an axis to drill a hole in a portion to be machined.
  • Cutting chips are generated from the workpiece to be cut by the drill, and the cutting chips grow along the groove of the drill.
  • the end portion of the cutting chips protrudes to the outside of the outer peripheral surface of the drill.
  • a gas for removing cutting chips generated by drilling a part to be machined by the drilling part from the discharge part is sent to a predetermined position on the outer peripheral surface of the drill. It is discharged toward.
  • the discharge unit discharges gas in a direction that coincides with the tangential direction of the outer peripheral surface that passes through a predetermined position when the drill is viewed in a plane along the axis. Therefore, the gas discharged from the discharge portion is sprayed on the end portion of the cutting chips protruding outward from the outer peripheral surface of the drill.
  • the end portion of the cutting chips is separated from the outer peripheral surface of the drill, and the cutting chips are separated from the groove of the drill.
  • the cutting chips separated from the groove of the drill are sucked by the suction part together with the gas discharged from the discharge part.
  • the cutting chips adhering to the groove portion of the drill included in the drilling portion are removed by the gas discharged from the discharge portion, so that the cutting chips are left in the groove of the drill. It is possible to prevent the work material from being damaged by cutting chips that grow while adhering.
  • the suction position for sucking the cutting chips in the circumferential direction around the axis is arranged within a range of half a circumference from the predetermined position.
  • the suction position is arranged within a half circumference from a predetermined position through which the gas discharged from the discharge portion passes in the circumferential direction around the axis. Therefore, the gas discharged from the discharge unit is guided to the suction unit together with the cutting chips while retaining the velocity component discharged from the discharge unit without orbiting around the axis.
  • the cutting chips are circulated around the axis and the cutting chips are moved from the predetermined position to the suction position without damaging the workpiece. Can be guided.
  • the discharge position at which the discharge portion discharges the gas is a position separated from the first surface along the axis, and the discharge portion is the position from the discharge position.
  • a configuration in which the gas is discharged in the direction intersecting the first surface is preferable. According to the drilling device having this configuration, since the gas is discharged from the discharge position in the direction intersecting the first surface, the cutting chips separated from the groove of the drill are guided toward the first surface. Since the cutting chips separated from the groove of the drill are not guided in the direction away from the first surface, it is possible to prevent the cutting chips from being discharged to the outside of the first support without being guided to the suction portion.
  • the discharge portion discharges gas in a direction corresponding to the helix angle of the groove of the drill.
  • the gas is discharged in the direction corresponding to the helix angle of the drill groove, so that the end of the cutting chip is separated from the outer peripheral surface along the direction corresponding to the helix angle of the drill groove. , Cutting chips can be more reliably separated from the groove of the drill.
  • the discharge portion discharges gas from the discharge position in a direction parallel to the first surface.
  • the gas since the gas is discharged from the discharge position in the direction parallel to the first surface, the cutting chips separated from the groove of the drill are guided in the direction parallel to the first surface. Since the cutting chips separated from the groove of the drill are not directly guided toward the first surface, it is possible to prevent the cutting chips from being directly guided to the first surface and damaging the first surface.
  • the drive mechanism rotates the drill so that the outer peripheral surface moves in the same direction as the gas discharge direction at the predetermined position.
  • the outer peripheral surface of the drill moves in the same direction as the gas discharge direction at a predetermined position through which the gas discharged from the discharge portion passes. Therefore, it is possible to always apply a force in the direction of separating the cutting chips adhering to the groove of the drill from the groove portion and promote the separation of the cutting chips from the groove. Further, since the velocity component from the predetermined position toward the suction portion is given to the cutting chips by the drill, the cutting groove can be more reliably guided to the suction portion.
  • a gas for removing the cutting chips from the groove of the drill toward the outer peripheral surface of the drill at a retracted position where the drilled portion is retracted from the machined portion It is preferable to have a configuration including an injection unit for injecting. According to the drilling device of this configuration, the drilling portion is retracted from the workpiece and the gas is injected toward the outer peripheral surface of the drill at the retracting position, so that the groove is not removed by the gas discharged from the discharging portion. The cutting debris adhering to the can be removed before the next drilling operation is performed.
  • a hole is drilled in a portion to be machined in which a plurality of materials to be machined are stacked, and a first support formed in a tubular shape extending along an axis extends the portion to be machined.
  • a hole is drilled in the workpiece by a drill having a circular cross-sectional shape orthogonal to the axis and a groove formed on the outer peripheral surface that swivels along the axis.
  • a drilling step (S102) for performing machining is provided, and in the drilling step, the drill is rotated about the axis and the drill is brought into the axis so as to come into contact with the first surface of the workpiece.
  • the gas for moving the inside of the first support along the same and removing the cutting debris generated by the drilling of the workpiece from the groove of the drill is released from the discharge portion of the first support.
  • the cutting chips When the cutting chips are discharged toward a predetermined position on the outer peripheral surface of the drill, the cutting chips are sucked together with the gas into the suction portion of the first support, and the discharge portion is viewed in a plan view along the axis.
  • the gas is discharged in a direction that coincides with the tangential direction of the outer peripheral surface that passes through the predetermined position.
  • the first surface of the workpiece in which a plurality of workpieces are stacked is supported by the first support, and the second surface of the workpiece is supported by the second support.
  • a drill having a groove formed on the outer peripheral surface is rotated around an axis to drill a hole in a portion to be machined.
  • Cutting chips are generated from the workpiece to be cut by the drill, and the cutting chips grow along the groove of the drill.
  • the end portion of the cutting chips protrudes to the outside of the outer peripheral surface of the drill.
  • a gas for removing cutting chips generated by drilling a part to be machined by a drilling part from a discharge part is sent to a predetermined position on an outer peripheral surface of the drill. It is discharged toward.
  • the discharge unit discharges gas in a direction that coincides with the tangential direction of the outer peripheral surface that passes through a predetermined position when the drill is viewed in a plane along the axis. Therefore, the gas discharged from the discharge portion is sprayed on the end portion of the cutting chips protruding outward from the outer peripheral surface of the drill.
  • the end portion of the cutting chips is separated from the outer peripheral surface of the drill, and the cutting chips are separated from the groove of the drill.
  • the cutting chips separated from the groove of the drill are sucked by the suction part together with the gas discharged from the discharge part.
  • the cutting debris adhering to the groove portion of the drill is removed by the gas discharged from the discharge portion, so that the cutting debris grows with the cutting debris adhering to the groove portion of the drill. Therefore, it is possible to prevent the work material from being damaged by the cutting chips.
  • the suction position for sucking the cutting chips in the circumferential direction around the axis is arranged within a range of half a circumference from the predetermined position.
  • the suction position is arranged within a range of half a circumference from a predetermined position through which the gas discharged from the discharge portion passes in the circumferential direction around the axis. Therefore, the gas discharged from the discharge unit is guided to the suction unit together with the cutting chips while retaining the velocity component discharged from the discharge unit without orbiting around the axis.
  • the cutting chips are circulated around the axis and the cutting chips are moved from the predetermined position to the suction position without damaging the workpiece. Can be guided.
  • the discharge position at which the discharge portion discharges the gas is a position separated from the first surface along the axis, and the drilling step is performed from the discharge position.
  • a configuration in which the gas is discharged in a direction intersecting the first surface is preferable. According to the drilling method of this configuration, since the gas is discharged from the discharge position in the direction intersecting the first surface, the cutting chips separated from the groove of the drill are guided toward the first surface. Since the cutting chips separated from the groove of the drill are not guided in the direction away from the first surface, it is possible to prevent the cutting chips from being discharged to the outside of the first support without being guided to the suction portion.
  • the drilling step preferably has a configuration in which gas is discharged from the discharge portion in a direction corresponding to the helix angle of the groove of the drill.
  • the gas is discharged in the direction corresponding to the helix angle of the drill groove, so that the end of the cutting chip is separated from the outer peripheral surface along the direction corresponding to the helix angle of the drill groove. , Cutting chips can be more reliably separated from the groove of the drill.
  • the drilling step preferably has a configuration in which gas is discharged from the discharge position in a direction parallel to the first surface.
  • the gas since the gas is discharged from the discharge position in the direction parallel to the first surface, the cutting chips separated from the groove of the drill are guided in the direction parallel to the first surface. Since the cutting chips separated from the groove of the drill are not directly guided toward the first surface, it is possible to prevent the cutting chips from being directly guided to the first surface and damaging the first surface.
  • the drilling step preferably has a configuration in which the drill is rotated so that the outer peripheral surface moves in the same direction as the gas discharge direction at the predetermined position.
  • the outer peripheral surface of the drill moves in the same direction as the gas discharge direction at a predetermined position through which the gas discharged from the discharge portion passes. Therefore, it is possible to always apply a force in the direction of separating the cutting chips adhering to the groove of the drill from the groove portion and promote the separation of the cutting chips from the groove. Further, since the velocity component from the predetermined position toward the suction portion is given to the cutting chips by the drill, the cutting groove can be more reliably guided to the suction portion.
  • a gas for removing the cutting chips from the groove of the drill toward the outer peripheral surface of the drill at the retracted position where the drilled portion is retracted from the workpiece It is preferable to have a configuration including an injection step of injecting. According to the drilling method of this configuration, the drilling portion is retracted from the workpiece and the gas is injected toward the outer peripheral surface of the drill at the retracting position, so that the groove is not removed by the gas discharged from the discharging portion. The cutting debris adhering to the can be removed before the next drilling operation is performed.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Drilling And Boring (AREA)
  • Auxiliary Devices For Machine Tools (AREA)
PCT/JP2020/016467 2020-04-14 2020-04-14 穴あけ装置および穴あけ方法 Ceased WO2021210076A1 (ja)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113996845A (zh) * 2021-12-17 2022-02-01 刘博� 自定位式螺丝智能生产用钻床铁屑清理装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11170104A (ja) * 1997-12-15 1999-06-29 Ishikawajima Harima Heavy Ind Co Ltd 穴明け機の工具清掃装置および清掃方法
JP2006281416A (ja) * 2005-04-04 2006-10-19 Nippon Mektron Ltd プリント基板の穴加工装置
JP2008126376A (ja) * 2006-11-22 2008-06-05 Mitsubishi Electric Corp 工作機械用集塵装置
JP5171826B2 (ja) * 2006-08-28 2013-03-27 ザ・ボーイング・カンパニー 切削工具破片除去システム

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11170104A (ja) * 1997-12-15 1999-06-29 Ishikawajima Harima Heavy Ind Co Ltd 穴明け機の工具清掃装置および清掃方法
JP2006281416A (ja) * 2005-04-04 2006-10-19 Nippon Mektron Ltd プリント基板の穴加工装置
JP5171826B2 (ja) * 2006-08-28 2013-03-27 ザ・ボーイング・カンパニー 切削工具破片除去システム
JP2008126376A (ja) * 2006-11-22 2008-06-05 Mitsubishi Electric Corp 工作機械用集塵装置

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113996845A (zh) * 2021-12-17 2022-02-01 刘博� 自定位式螺丝智能生产用钻床铁屑清理装置
CN113996845B (zh) * 2021-12-17 2023-11-03 刘博� 自定位式螺丝智能生产用钻床铁屑清理装置

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