WO2023181638A1 - Machine-outil - Google Patents

Machine-outil Download PDF

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Publication number
WO2023181638A1
WO2023181638A1 PCT/JP2023/002779 JP2023002779W WO2023181638A1 WO 2023181638 A1 WO2023181638 A1 WO 2023181638A1 JP 2023002779 W JP2023002779 W JP 2023002779W WO 2023181638 A1 WO2023181638 A1 WO 2023181638A1
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WO
WIPO (PCT)
Prior art keywords
tool
coupling
section
tooth
turning
Prior art date
Application number
PCT/JP2023/002779
Other languages
English (en)
Japanese (ja)
Inventor
雅之 渡邉
Original Assignee
村田機械株式会社
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 村田機械株式会社 filed Critical 村田機械株式会社
Publication of WO2023181638A1 publication Critical patent/WO2023181638A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B29/00—Holders for non-rotary cutting tools; Boring bars or boring heads; Accessories for tool holders
    • B23B29/03—Boring heads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B29/00—Holders for non-rotary cutting tools; Boring bars or boring heads; Accessories for tool holders
    • B23B29/24—Tool holders for a plurality of cutting tools, e.g. turrets
    • B23B29/32—Turrets adjustable by power drive, i.e. turret heads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B5/00—Turning-machines or devices specially adapted for particular work; Accessories specially adapted therefor
    • B23B5/36—Turning-machines or devices specially adapted for particular work; Accessories specially adapted therefor for turning specially-shaped surfaces by making use of relative movement of the tool and work produced by geometrical mechanisms, i.e. forming-lathes
    • B23B5/40—Turning-machines or devices specially adapted for particular work; Accessories specially adapted therefor for turning specially-shaped surfaces by making use of relative movement of the tool and work produced by geometrical mechanisms, i.e. forming-lathes for turning spherical surfaces inside or outside

Definitions

  • the present invention relates to machine tools.
  • Machine tools can process workpieces of various shapes.
  • the technique described in Patent Document 1 relates to a machine tool that processes a workpiece that has a cavity formed inside and an opening that communicates from the cavity to the outside of the workpiece.
  • the machine tool described in Patent Document 1 includes a first portion extending in a first direction, and a second portion extending from an end of the first portion in a second direction intersecting the first direction, and the second portion extends in a second direction.
  • the inner wall of the workpiece is machined using a tool that has a blade at its tip.
  • the diameter of the opening in the workpiece may be smaller than the length of the second part of the tool. If the diameter of the opening is smaller than the length of the second portion, the machine tool changes the angle of the tool relative to the opening to insert the second portion into the cavity through the opening. The angle of the tool relative to the opening can be changed by rotating at least one of the tool and the workpiece.
  • the machine tool described in Patent Document 1 changes the angle of the tool with respect to the opening by rotating the workpiece.
  • the machine tool After inserting the second part into the cavity, the machine tool processes the inner wall of the workpiece.
  • the machine tool described in Patent Document 1 performs machining while rotating the tool.
  • a type of machine tool that rotates the tool when inserting the second part into the cavity through the opening and rotates the workpiece when machining the inner wall of the workpiece fixes the tool when machining the inner wall part. It is necessary to do so.
  • This problem can be solved, for example, by a machine tool that includes a turning device that holds the tool in a rotatable manner and a fixing device that holds the tool in a fixed manner. That is, the machine tool rotates the tool using the turning device to insert the second portion into the cavity, and fixes the tool using the fixing device to process the inner wall portion.
  • the tool held by the rotating device in order to process the inner wall. It is not easy to use, and it is inefficient.
  • the tool held by the fixing device after processing the inner wall using the fixing device, the tool held by the fixing device must be transferred to the rotating device in order to take out the second part from the cavity. It's inefficient.
  • a machine tool that processes a workpiece while rotating it.
  • the workpiece has a cavity formed inside and an opening communicating from the cavity to the outside of the workpiece.
  • the machine tool includes a first portion extending in a first direction, a second portion extending from an end of the first portion in a second direction intersecting the first direction, and a tool having a blade portion for machining an inner wall portion of a workpiece.
  • the machine tool includes a holding part that holds the first part.
  • the machine tool includes a turning section that turns the holding section around an axis perpendicular to a plane parallel to the first direction and the second direction.
  • the machine tool includes a braking section that brakes the turning of the turning section.
  • the pivoting section pivots the holding section when inserting the tool into the cavity through the opening.
  • the brake part brakes the turning by the turning part when processing the inner wall part.
  • the machine tool of the above embodiment can switch between rotating the tool and fixing the tool while holding the tool, and can efficiently process the inner wall of a workpiece having a cavity.
  • the machine tool may include an accommodating section that accommodates the turning section and the braking section.
  • the braking section may include a curvic coupling provided inside the turning section.
  • the curvic coupling may include a first annular coupling fixed to the pivot and having first teeth.
  • the curvic coupling may include an annular second coupling that is provided concentrically with respect to the first coupling, is fixed to the housing part, and has second teeth.
  • the curvic coupling may include an annular third coupling that is movable in the axial direction of the rotating portion and has a third tooth portion.
  • the rotating portion may be capable of rotating the holding portion when the third tooth portion is not engaged with the first tooth portion and the second tooth portion.
  • the rotating portion may be unable to rotate the holding portion when the third tooth portion is engaged with the first tooth portion and the second tooth portion.
  • the machine tool of this embodiment can switch between rotating the tool and fixing the tool using the curvic coupling.
  • the machine tool may include a control unit that controls the rotation of the rotation unit.
  • the braking section may include a positional displacement regulating section that restricts positional displacement between the second coupling and the third coupling in the circumferential direction.
  • the control section may stop the rotating section at an angle that allows the third tooth section to mesh with the first tooth section.
  • the braking section may include a braking device that presses the friction material against the rotating section.
  • the pivoting portion may be capable of pivoting the holding portion when the friction material is not pressed.
  • the rotating portion may be unable to rotate the holding portion when the friction material is pressed.
  • the machine tool of this aspect can switch between rotating the tool and fixing the tool using a brake device that presses a friction material against the rotating part.
  • the machine tool may be equipped with a tool rest to which tools are attached.
  • the machine tool may include a rotation drive unit that rotationally drives a tool attached to a tool post.
  • the turning section may be driven by a rotational drive section.
  • the machine tool of this embodiment can rotate the tool using a general-purpose tool post.
  • the tool rest may be a turret that radially attaches a plurality of tools and performs rotation indexing.
  • the machine tool of this embodiment can rotate the tool using a turret.
  • FIG. 1 is a front view schematically showing an example of the configuration of a machine tool 100.
  • FIG. 1 is a side view schematically showing an example of the configuration of a machine tool 100.
  • FIG. 2 is a side sectional view schematically showing an example of the configuration of a tool holding device 140.
  • FIG. It is a perspective view showing roughly an example of composition of the 1st coupling 145A and the 2nd coupling 145B. It is a perspective view which shows roughly an example of a structure of 3rd coupling 145C.
  • FIG. 3 is a perspective view schematically showing an example of a state in which a third coupling 145C is engaged with a first coupling 145A and a second coupling 145B.
  • FIG. 3 is a diagram schematically showing an example of control processing before starting machining of an inner wall portion I1 of a workpiece W1.
  • FIG. 6 is a diagram schematically showing an example of a procedure for inserting the tool 150 into the cavity C1 through the opening A1.
  • FIG. 6 is a diagram schematically showing an example of a procedure for inserting the tool 150 into the cavity C1 through the opening A1.
  • FIG. 6 is a diagram schematically showing an example of a procedure for inserting the tool 150 into the cavity C1 through the opening A1.
  • FIG. 6 is a diagram schematically showing an example of a procedure for inserting the tool 150 into the cavity C1 through the opening A1.
  • FIG. 6 is a diagram schematically showing an example of a procedure for inserting the tool 150 into the cavity C1 through the opening A1. It is a figure which shows schematically an example of the control process after finishing the process of the inner wall part I1 of the workpiece
  • FIG. 1 is a front view schematically showing an example of the configuration of a machine tool 100.
  • FIG. 2 is a side view schematically showing an example of the configuration of the machine tool 100.
  • a Z-axis whose right direction is the +Z direction when facing the paper
  • an X-axis whose upward direction is the +X direction when facing the paper
  • a Y-axis whose depth direction is the -Y direction when facing the paper. are shown perpendicular to each other.
  • the explanation may be made using three axes: the X axis, the Y axis, and the Z axis.
  • the Z direction is an example of the first direction.
  • the X direction is an example of the second direction.
  • the ZX plane is an example of a plane parallel to the first direction and the second direction.
  • the machine tool 100 is a machine that mainly removes unnecessary parts from a metal workpiece W1 by cutting, grinding, etc., and forms it into a desired shape.
  • the machine tool 100 of the embodiment processes the workpiece W1 while rotating it.
  • the work W1 has a cavity C1 formed inside and an opening A1 communicating from the cavity C1 to the outside of the work W1.
  • the workpiece W1 is, for example, a differential case.
  • the machine tool 100 includes a chuck 110, a turret 120, a rotation drive section 130, a tool holding device 140, a tool 150, a brake drive section 160, and a control device 170.
  • the chuck 110 is a component attached to the end of the spindle to hold the workpiece W1.
  • the chuck 110 is rotatably provided around the main axis AX1.
  • the main axis AX1 is an axis parallel to the Z axis.
  • the Z direction is a direction parallel to the main axis AX1.
  • the chuck 110 holds the work W1 and rotates the work W1 around the main axis AX1.
  • the turret 120 is a tool rest to which a plurality of tools are attached radially and performs rotation indexing.
  • the turret 120 includes a plurality of tool attachment parts TM1 that are provided so that tools can be attached thereto.
  • a tool holding device 140 can be attached to at least one tool attachment portion TM1 among the plurality of tool attachment portions TM1.
  • the turret 120 is provided so as to be movable in the Z direction and the X direction, and to be pivotable around the turret rotation axis AX2.
  • the turret rotation axis AX2 is an axis parallel to the Z-axis.
  • the Z direction is a direction parallel to the turret rotation axis AX2.
  • Turret 120 is an example of a tool post.
  • a turret is a stand on which tools and other items are attached.
  • the rotation drive unit 130 is a device that rotationally drives the tool attached to the turret 120.
  • the rotation drive unit 130 is, for example, a motor for rotating a tool attached to the turret 120.
  • the tool holding device 140 is a device that holds the tool 150 so that it can be switched between rotating and fixing the tool 150.
  • the tool 150 has a first portion 151 extending in a first direction, a second portion 152 extending from an end of the first portion 151 in a second direction intersecting the first direction, and a distal end of the second portion 152.
  • the tool has a blade portion 153 at the top.
  • FIG. 1 when the first portion 151 is viewed so that the first direction is parallel to the Z axis, the second portion 152 extends in +X direction from the ⁇ Z side end of the first portion 151 toward the ⁇ Z direction. curved in the direction.
  • the blade portion 153 is the cutting edge of the tool 150 that processes the inner wall portion I1 of the workpiece W1.
  • the tool holding device 140 holds the first portion 151 of the tool 150 at a predetermined specific position. By holding the specific position in the first portion 151 of the tool 150 by the tool holding device 140, the control device 170 can specify the position of the blade portion 153 when the tool holding device 140 holds the tool 150.
  • the tool holding device 140 includes a mechanism for rotating the tool 150 and a mechanism for braking the mechanism for rotating the tool 150.
  • the tool holding device 140 uses a mechanism for rotating the tool 150 to rotate the tool 150 around the rotation axis AX3 when inserting the tool 150 into the cavity C1 through the opening A1 of the workpiece W1.
  • the tool holding device 140 uses a mechanism that brakes a mechanism for rotating the tool 150 to fix the tool 150 when processing the inner wall portion I1 of the workpiece W1.
  • the rotation axis AX3 is an axis perpendicular to the ZX plane.
  • the brake drive unit 160 is a device that drives a mechanism that brakes a mechanism that rotates the tool 150.
  • the brake drive unit 160 drives a mechanism that brakes a mechanism that rotates the tool 150 using air, for example.
  • the control device 170 is a device that controls various operations of the machine tool 100.
  • the control device 170 controls the rotational operation of the chuck 110, for example.
  • the control device 170 controls, for example, the movement and rotation of the turret 120.
  • the control device 170 controls the rotation drive unit 130, for example.
  • the control device 170 controls the brake drive unit 160, for example.
  • Control device 170 is an example of a control section.
  • FIG. 3 is a side sectional view schematically showing an example of the configuration of the tool holding device 140.
  • the tool holding device 140 includes a housing section 141, a turning mechanism 142, a holding section 143, and a braking section 144.
  • the accommodating part 141 is a part that accommodates the turning mechanism 142 and the braking part 144.
  • the accommodating portion 141 has a first opening 141A and a second opening 141B.
  • the turning mechanism 142 is a mechanism for turning the holding part 143.
  • the turning mechanism 142 includes a first shaft 142A, a second shaft 142B, and a turning section 142C.
  • the first shaft 142A is a rotating shaft for transmitting the power of the rotational drive unit 130 to the second shaft 142B.
  • the first shaft 142A is exposed from the first opening 141A, and one end is connected to the rotation drive unit 130 when the tool holding device 140 is attached to the turret 120.
  • the first shaft 142A has a first gear CW1 at the other end.
  • the second shaft 142B is a rotating shaft for transmitting the power of the first shaft 142A to the rotating part 142C.
  • the second shaft 142B is supported by the first bearing B1.
  • the second shaft 142B has a second gear CW2 at one end.
  • the first gear CW1 and the second gear CW2 constitute a gear pair.
  • the second shaft 142B has a third gear CW3 at the other end.
  • the turning part 142C is a component that turns the holding part 143 around the turning axis AX3.
  • the rotating portion 142C is supported by a second bearing B2.
  • the rotating portion 142C has a cylindrical surface portion CS1 and a plane portion P1 that intersects with the generatrix of the cylindrical surface portion CS1.
  • the cylindrical surface portion CS1 has a fourth gear CW4.
  • the third gear CW3 and the fourth gear CW4 constitute a gear pair.
  • the plane portion P1 is exposed from the second opening 141B and is fixed to the holding portion 143.
  • the rotating section 142C is driven by the rotational drive section 130 via the first shaft 142A and the second shaft 142B.
  • the holding part 143 is a component that holds the tool 150.
  • the holding part 143 includes a support part 143A and a head part 143B.
  • the support portion 143A is a component that supports the head portion 143B.
  • the support portion 143A is fixed to the rotating portion 142C and the head portion 143B.
  • the head portion 143B is a component to which the tool 150 is attached.
  • the head portion 143B includes a tool attachment portion TM2 to which the first portion 151 of the tool 150 is attached.
  • the head portion 143B is fixed to the support portion 143A so that the axis of the first portion 151 of the tool 150 intersects the rotation axis AX3 when the tool 150 is attached.
  • the holding part 143 is movable in the Z direction and the X direction. Since the rotating portion 142C is pivotable around the pivot axis AX3, the holding portion 143 is pivotable around the pivot axis AX3.
  • the brake part 144 is a mechanism that brakes the rotation of the holding part 143.
  • the braking unit 144 includes a curvic coupling 145, a regulating pin 146, and a cylinder 147.
  • the curvic coupling 145 is a component that brakes the turning of the turning section 142C.
  • the curvic coupling 145 is provided inside the cylindrical surface portion CS1 of the rotating portion 142C.
  • the curvic coupling 145 includes a first coupling 145A, a second coupling 145B, and a third coupling 145C.
  • FIG. 4 is a perspective view schematically showing an example of the configuration of the first coupling 145A and the second coupling 145B.
  • FIG. 5 is a perspective view schematically showing an example of the configuration of the third coupling 145C.
  • FIG. 6 is a perspective view schematically showing an example of a state in which the third coupling 145C is engaged with the first coupling 145A and the second coupling 145B.
  • the first coupling 145A is an annular component.
  • the first coupling 145A has a first tooth surface portion TS1 that is perpendicular to the rotation axis AX3 and faces the third coupling 145C.
  • the first tooth surface portion TS1 has a plurality of first recesses T1 extending in the radial direction.
  • the first recess T1 is an example of a first tooth.
  • the first coupling 145A includes a first flange portion F1 provided on the outer periphery of the first tooth surface portion TS1.
  • the first flange portion F1 is fixed to the cylindrical surface portion CS1 of the rotating portion 142C. Since the first coupling 145A is fixed to the rotating portion 142C, it can rotate together with the rotating portion 142C.
  • the second coupling 145B is an annular component provided concentrically with respect to the first coupling 145A.
  • the second coupling 145B has a second tooth surface portion TS2 that is perpendicular to the rotation axis AX3 and faces the third coupling 145C.
  • the second tooth surface portion TS2 has a second recess T2 extending in the radial direction.
  • the number of second recesses T2 is the same as the number of first recesses T1 of the first coupling 145A.
  • the first coupling 145A has a pin insertion portion PI1 into which the regulation pin 146 is inserted.
  • the second recess T2 is an example of a second tooth.
  • the surface of the second coupling 145B opposite to the second tooth surface portion TS2 is fixed to the housing portion 141. Since the second coupling 145B is fixed to the accommodating portion 141, it does not turn even if the turning portion 142C turns.
  • the third coupling 145C is an annular component provided movably along the pivot axis AX3.
  • the third coupling 145C has a third tooth surface portion TS3 that is perpendicular to the rotation axis AX3 and faces the first coupling 145A and the second coupling 145B.
  • the third tooth surface portion TS3 has a convex portion T3 extending in the radial direction.
  • the number of protrusions T3 is the same as the number of first recesses T1 of first coupling 145A and second recesses T2 of second coupling 145B.
  • the convex portion T3 is an example of a third tooth portion.
  • the third coupling 145C has a pin fixing part PM1 into which the regulating pin 146 is inserted and fixed.
  • a surface of the third coupling 145C opposite to the third tooth surface portion TS3 is attached to the cylinder 147.
  • the third coupling 145C is arranged by the cylinder 147 at a position where the convex part T3 engages with the first concave part T1 and the second concave part T2, and a position where the convex part T3 does not engage with the first concave part T1 and the second concave part T2. It is possible to move.
  • the regulating pin 146 is a rod-shaped component that regulates positional deviation in the circumferential direction between the second coupling 145B and the third coupling 145C.
  • One end of the regulation pin 146 is inserted and fixed into the pin fixing part PM1 of the third coupling 145C.
  • the other end of the restriction pin 146 is inserted into the pin insertion portion PI1 of the second coupling 145B.
  • the regulating pin 146 has a length that does not come off from the pin insertion portion PI1 of the second coupling 145B even if the third coupling 145C moves to a position where the convex portion T3 does not engage with the first concave portion T1 and the second concave portion T2.
  • the regulating pin 146 Since the regulating pin 146 does not come out from the pin insertion portion PI1 even if the third coupling 145C moves, the regulating pin 146 regulates positional deviation in the circumferential direction between the second coupling 145B and the third coupling 145C. .
  • the regulating pin 146 is an example of a displacement regulating section.
  • the cylinder 147 is an actuator that performs linear motion.
  • the cylinder 147 includes a shaft portion 147A, a piston 147B, and a piston rod 147C.
  • the shaft portion 147A is a rod-shaped component that defines the direction in which the piston 147B and the piston rod 147C operate.
  • the shaft portion 147A is fixed to the accommodating portion 141 such that the axis of the shaft portion 147A overlaps the rotation axis AX3.
  • the piston 147B is a component that operates by air pressure received in the cylinder chamber and transmits mechanical force or movement. Piston 147B is fixed to piston rod 147C.
  • the brake drive unit 160 supplies air to the cylinder chamber to apply air pressure to the cylinder chamber. In FIG. 3, the piston 147B moves in the +Y direction due to the air pressure received in the first cylinder chamber CC1, and moves in the -Y direction due to the air pressure received in the second cylinder chamber CC2.
  • the piston rod 147C is a component that transmits force or movement from the piston 147B. Piston rod 147C is attached to piston 147B. The piston rod 147C includes a flange portion F2. The third coupling 145C is fixed to the flange portion F2.
  • FIG. 7 is a side cross-sectional view schematically showing an example of a state in which the turning section 142C can turn.
  • the brake drive unit 160 supplies air to the first cylinder chamber CC1 to apply air pressure to the first cylinder chamber CC1.
  • the piston 147B moves in the +Y direction due to the air pressure received in the first cylinder chamber CC1.
  • the third coupling 145C fixed to the piston rod 147C moves to a position where the convex portion T3 does not engage with the first concave portion T1 and the second concave portion T2.
  • the first coupling 145A becomes pivotable.
  • the rotating portion 142C fixed to the first coupling 145A can rotate the holding portion 143 when inserting the tool 150 into the cavity C1 of the workpiece W1. .
  • FIG. 8 is a side cross-sectional view schematically showing an example of a state in which the turning portion 142C cannot turn.
  • the brake drive unit 160 supplies air to the second cylinder chamber CC2 to apply air pressure to the second cylinder chamber CC2.
  • the piston 147B moves in the ⁇ Y direction due to the air pressure received in the second cylinder chamber CC2.
  • the third coupling 145C fixed to the piston rod 147C moves to a position where the convex portion T3 engages with the first concave portion T1 and the second concave portion T2.
  • the first coupling 145A becomes unable to rotate. Since the first coupling 145A cannot be turned, the turning part 142C fixed to the first coupling 145A cannot turn the holding part 143 when machining the inner wall part I1 of the workpiece W1.
  • FIG. 9 is a diagram schematically showing an example of control processing before starting machining of the inner wall portion I1 of the workpiece W1.
  • the turning section 142C is in a state where it can turn.
  • control device 170 When processing the inner wall portion I1 of the workpiece W1, the control device 170 starts controlling the turret 120 and the rotation drive unit 130 so that the tool 150 is inserted into the cavity C1 through the opening A1 of the workpiece W1. (S101).
  • the control device 170 controls the turret 120 and the rotation drive unit 130 so that the tool 150 is inserted while moving and turning (S102). In S102, the control device 170 controls the turret 120 to move the tool 150, and controls the rotation drive unit 130 to rotate the tool 150.
  • the machine tool 100 continues the control process of S102 until the tool 150 is inserted into the cavity C1 of the workpiece W1 (S103; NO ⁇ S102).
  • FIGS 10 to 13 are diagrams schematically showing an example of a procedure for inserting the tool 150 into the cavity C1 through the opening A1.
  • the tool 150 has the blade portion 153 facing the +X direction and is at the same position in the Y direction with respect to the opening A1 of the workpiece W1.
  • the tool holding device 140 is located at a position where the pivot axis AX3 is shifted in the +X direction from the opening A1 of the workpiece W1.
  • the control device 170 controls the rotation drive unit 130 to rotate the tool 150 so that the tool 150 is in a posture that allows the second portion 152 of the tool 150 to be inserted into the opening A1 of the workpiece W1. In FIG. 10, the control device 170 rotates the tool 150 counterclockwise when viewed from the +Y direction side.
  • control device 170 controls the turret 120 to move the tool 150 so that the second portion 152 of the tool 150 is inserted into the opening A1 of the workpiece W1.
  • the control device 170 is moving the tool 150 in the ⁇ Z direction.
  • the control device 170 controls the turret 120 to move the tool 150 so that the first portion 151 of the tool 150 is inserted into the opening A1, and controls the rotation drive unit 130 to rotate the tool 150. do.
  • the control device 170 moves the tool 150 in the -X direction and the -Z direction, and rotates the tool 150 clockwise when viewed from the +Y direction side.
  • the control device 170 further moves the tool 150 in the -X direction and the -Z direction, and further rotates the tool 150 clockwise when viewed from the +Y direction side.
  • the control device 170 stops the movement of the tool 150 and stops the rotation of the tool 150 (S104). .
  • the control device 170 controls the rotation drive unit 130 to stop the rotating part 142C at an angle that allows the convex part T3 of the third coupling 145C to engage with the first recess T1 of the first coupling 145A. do.
  • the control device 170 stops the movement of the tool 150 and stops the rotation of the tool 150 when the blade portion 153 of the tool 150 inserted into the cavity C1 faces the inner wall portion I1 of the workpiece W1. ing.
  • the control device 170 controls the brake drive unit 160 to apply air pressure to the second cylinder chamber CC2 so that the rotation by the rotation unit 142C is braked (S105). .
  • the piston 147B moves in the ⁇ Y direction due to the air pressure received in the second cylinder chamber CC2.
  • the third coupling 145C fixed to the piston rod 147C moves to a position where the convex portion T3 engages with the first concave portion T1 and the second concave portion T2.
  • the first coupling 145A becomes unable to rotate.
  • the swiveling portion 142C fixed to the first coupling 145A becomes unswivelable.
  • control device 170 controls the chuck 110 and the turret 120 so that the inner wall portion I1 of the workpiece W1 is machined (S106).
  • the control device 170 controls the chuck 110 to rotate the chuck 110 so that the workpiece W1 is rotated.
  • control device 170 controls the turret 120 to move the tool 150 so that the depth of cut in machining is defined.
  • control device 170 moves turret 120 in the X direction. That is, the X direction is a direction that defines the depth of cut in machining the inner wall portion I1 of the workpiece W1.
  • FIG. 14 is a diagram schematically showing an example of the control process after finishing the machining of the inner wall portion I1 of the workpiece W1.
  • the turning section 142C is in a non-turnable state.
  • the control device 170 controls the brake drive unit 160 to apply air pressure to the first cylinder chamber CC1 so that the rotation brake by the rotation unit 142C is released.
  • S201 As described above, when air is supplied to the first cylinder chamber CC1, the piston 147B moves in the +Y direction due to the air pressure received in the first cylinder chamber CC1. When the piston 147B moves in the +Y direction, the third coupling 145C fixed to the piston rod 147C moves to a position where the convex portion T3 does not engage with the first concave portion T1 and the second concave portion T2.
  • the first coupling 145A becomes pivotable.
  • the pivoting portion 142C fixed to the first coupling 145A becomes pivotable.
  • control device 170 starts controlling the turret 120 and the rotation drive unit 130 so that the tool 150 is taken out of the workpiece W1 (S202).
  • the control device 170 controls the turret 120 and the rotation drive unit 130 so that the tool 150 is taken out while moving and turning (S203).
  • the control device 170 controls the turret 120 to move the tool 150, and controls the rotation drive unit 130 to rotate the tool 150.
  • the procedure for taking out the tool 150 from the outside of the workpiece W1 is the reverse procedure of inserting the tool 150 into the cavity C1 through the opening A1.
  • the machine tool 100 continues the control process of S203 until the tool 150 is taken out from the workpiece W1 (S204; NO ⁇ S203).
  • the control device 170 stops the movement of the tool 150 and stops the rotation of the tool 150 (S104).
  • the machine tool 100 in the above embodiment is a machine that processes the workpiece W1 while rotating it.
  • the work W1 has a cavity C1 formed inside and an opening A1 communicating from the cavity C1 to the outside of the work W1.
  • the machine tool 100 includes a first portion 151 extending in a first direction, a second portion 152 extending from an end of the first portion 151 in a second direction intersecting the first direction, and a blade for machining an inner wall portion I1 of a workpiece W1.
  • a tool 150 having a portion 153 is provided.
  • Machine tool 100 includes a holding portion 143 that holds first portion 151 of tool 150 .
  • the machine tool 100 includes a turning section 142C that turns the holding section 143 around a turning axis AX3 that is perpendicular to a plane parallel to the first direction and the second direction.
  • the machine tool 100 includes a braking section 144 that brakes the turning by the turning section 142C.
  • the turning section 142C turns the holding section 143 when inserting the tool 150 into the cavity C1 through the opening A1.
  • the brake part 144 brakes the turning by the turning part 142C when processing the inner wall part I1.
  • the machine tool 100 can switch between rotating the tool 150 and fixing the tool 150 while holding the tool 150, and can efficiently process the inner wall I1 of the workpiece W1 having the cavity C1.
  • the machine tool 100 in the above embodiment includes a housing section 141 that houses the swing section 142C and the brake section 144.
  • the braking section 144 includes a curvic coupling 145 provided inside the turning section 142C.
  • the curvic coupling 145 includes an annular first coupling 145A that is fixed to the rotating portion 142C and has a first recess T1.
  • the curvic coupling 145 is provided concentrically with respect to the first coupling 145A, is fixed to the housing portion 141, and includes an annular second coupling 145B having a second recess T2.
  • the curvic coupling 145 is provided so as to be movable in the axial direction of the rotating portion 142C, and includes an annular third coupling 145C having a convex portion T3.
  • the rotating portion 142C can rotate the holding portion 143 when the convex portion T3 is not engaged with the first recess T1 and the second recess T2.
  • the rotating portion 142C cannot rotate the holding portion 143 when the convex portion T3 is engaged with the first recess T1 and the second recess T2.
  • the machine tool 100 can use the curvic coupling 145 to switch between rotating the tool 150 and fixing the tool 150.
  • the machine tool 100 in the above embodiment includes a control device 170 that controls the turning of the turning section 142C.
  • the braking portion 144 includes a regulating pin 146 that regulates positional deviation in the circumferential direction between the second coupling 145B and the third coupling 145C.
  • the control device 170 stops the rotating portion 142C at an angle that allows the convex portion T3 to engage with the first concave portion T1.
  • the machine tool 100 can prevent misalignment caused by misalignment of the third coupling 145C with respect to the first coupling 145A and the second coupling 145B in the circumferential direction.
  • the machine tool 100 in the above embodiment includes a turret 120 on which a tool is attached.
  • the machine tool 100 includes a rotation drive section 130 that rotationally drives a tool attached to a turret 120.
  • the rotation section 142C is driven by the rotation drive section 130.
  • the machine tool 100 can rotate the tool 150 using a general-purpose turret 120.
  • the third coupling 145C in the above embodiment has the same number of protrusions T3 as the number of first recesses T1 of the first coupling 145A and the number of second recesses T2 of the second coupling 145B.
  • the convex portions T3 only need to be able to engage with the first concave portions T1 and the second concave portions T2, and are not limited to the same number as the number of the first concave portions T1 and the number of the second concave portions T2.
  • the number of convex portions T3 may be smaller than the number of first concave portions T1.
  • the number of convex portions T3 may be smaller than the number of second concave portions T2.
  • the number of convex portions T3 may be smaller than the number of first concave portions T1 and the number of second concave portions T2.
  • the curvic coupling 145 in the above embodiment has a first recess T1 as a first tooth, a second recess T2 as a second tooth, and a convex T3 as a third tooth.
  • the curvic coupling 145 only needs to be able to engage the third tooth portion with the first tooth portion and the second tooth portion, and which tooth portion is concave and which tooth portion is convex. , is optional.
  • the curvic coupling 145 may have a convex first tooth, a convex second tooth, and a concave third tooth.
  • the curvic coupling 145 has a concave first tooth portion, a convex second tooth portion, a convex portion that meshes with the first tooth portion, and a concave portion that meshes with the second tooth portion. It may have a third tooth portion.
  • the curvic coupling 145 has a convex first tooth portion, a concave second tooth portion, a concave portion that meshes with the first tooth portion, and a convex portion that meshes with the second tooth portion. It may have a third tooth portion.
  • the curvic coupling 145 in the above embodiment has a first recess T1 extending in the radial direction as a first tooth, a second recess T2 extending in the radial direction as a second tooth, and a third recess T1 as a third tooth. It has a convex portion T3 extending in the radial direction.
  • the curvic coupling 145 is not limited to a shape extending in the radial direction, as long as the third tooth portion can be engaged with the first tooth portion and the second tooth portion.
  • the curvic coupling 145 has a first tooth portion extending in the circumferential direction, a second tooth portion extending in the circumferential direction, a portion meshing with the first tooth portion and a portion meshing with the second tooth portion each extending in the circumferential direction. It may have three teeth.
  • the curvic coupling 145 has a first tooth portion extending in the radial direction, a second tooth portion extending in the circumferential direction, a portion meshing with the first tooth portion extending in the radial direction, and a portion meshing with the first tooth portion extending in the radial direction.
  • the engaging portion may include a third tooth portion extending in the circumferential direction.
  • the curvic coupling 145 has a first tooth portion extending in the circumferential direction, a second tooth portion extending in the radial direction, a portion meshing with the first tooth portion extending in the circumferential direction, and a portion meshing with the first tooth portion extending in the circumferential direction.
  • the engaging portion may include a third tooth portion extending in the radial direction.
  • the braking unit 144 in the above embodiment includes a curvic coupling 145.
  • the braking section 144 only needs to be able to brake the turning by the turning section 142C, and is not limited to the configuration including the curvic coupling 145.
  • FIG. 15 is a side sectional view schematically showing a modification of the configuration of the tool holding device 140.
  • the braking unit 144 of the tool holding device 140 in the modified example includes a friction material 148 and a brake device 149.
  • the brake device 149 is a device that presses the friction material 148 against the rotating portion 142C.
  • the brake device 149 is provided inside the cylindrical surface portion CS1 of the rotating portion 142C, and is operated by air pressure received in the pressure chamber PC1.
  • the brake drive unit 160 supplies air to the pressure chamber PC1 to apply air pressure to the pressure chamber PC1, and removes air from the pressure chamber PC1 to lower the air pressure in the pressure chamber PC1.
  • the brake device 149 presses the friction material 148 against the inner surface of the cylindrical surface portion CS1 of the rotating portion 142C by the air pressure received in the pressure chamber PC1.
  • the brake drive unit 160 When inserting the tool 150 into the cavity C1 through the opening A1 of the workpiece W1, the brake drive unit 160 removes air from the pressure chamber PC1 to lower the air pressure in the pressure chamber PC1. When the air pressure in the pressure chamber PC1 decreases, the brake device 149 releases the pressing of the friction material 148 against the rotating portion 142C. Since the friction material 148 is not pressed, the turning section 142C can turn the holding section 143 when inserting the tool 150 into the cavity C1 through the opening A1 of the workpiece W1.
  • the brake drive unit 160 supplies air to the pressure chamber PC1 to apply air pressure to the pressure chamber PC1.
  • the brake device 149 presses the friction material 148 against the rotating portion 142C. By being pressed against the friction material 148, the rotating portion 142C is unable to rotate the holding portion 143 when machining the inner wall portion I1 of the workpiece W1.
  • the braking section 144 includes a braking device 149 that presses the friction material 148 against the rotating section 142C.
  • the rotating portion 142C can rotate the holding portion 143 when the friction material 148 is not pressed.
  • the rotating portion 142C cannot rotate the holding portion 143 when the friction material 148 is pressed.
  • the tool rest in the above embodiment and the above modification is the turret 120.
  • the tool post is not limited to the turret 120 as long as it is capable of attaching the tool holding device 140.
  • the tool rest may be, for example, a square tool rest.
  • a square turret is a turret that attaches knives on all sides and can rotate.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Machine Tool Units (AREA)

Abstract

Le problème décrit par la présente invention est de permettre la commutation entre amener un outil à tourner et amener l'outil à être fixe pendant que l'outil est maintenu et l'usinage de manière efficace d'une section de paroi interne d'une pièce qui a une section de vide et une ouverture. La solution selon l'invention porte sur une pièce qui a une section de vide formée en son sein et une ouverture qui communique de la section de vide à l'extérieur de la pièce. Cette machine-outil comprend un outil ayant une première partie qui s'étend dans une première direction, une seconde partie qui s'étend à partir d'une extrémité de la première partie dans une seconde direction qui croise la première direction et une section bord de coupe qui usine la section de paroi interne de la pièce. La machine-outil comprend une partie de maintien qui maintient la première partie. La machine-outil comprend une partie tournante qui fait tourner la partie de maintien autour d'un axe qui est orthogonal à un plan parallèle à la première direction et à la seconde direction. La machine-outil comprend une partie de freinage qui freine la rotation de la partie tournante. La partie tournante fait tourner la partie de maintien lorsque l'outil est inséré dans la section de vide par l'ouverture. La partie de freinage freine la rotation par la partie tournante lors de l'usinage de la section de paroi interne.
PCT/JP2023/002779 2022-03-23 2023-01-30 Machine-outil WO2023181638A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2022-046837 2022-03-23
JP2022046837 2022-03-23

Publications (1)

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WO2023181638A1 true WO2023181638A1 (fr) 2023-09-28

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001341013A (ja) * 2000-05-31 2001-12-11 Yamazaki Mazak Corp 内径加工方法
JP2007210062A (ja) * 2006-02-09 2007-08-23 Murata Mach Ltd タレット旋盤
JP2014087853A (ja) * 2012-10-29 2014-05-15 Tsugami Corp 工作機械
CN108380914A (zh) * 2018-04-26 2018-08-10 盐城工业职业技术学院 一种差速器内孔加工组合刀架

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001341013A (ja) * 2000-05-31 2001-12-11 Yamazaki Mazak Corp 内径加工方法
JP2007210062A (ja) * 2006-02-09 2007-08-23 Murata Mach Ltd タレット旋盤
JP2014087853A (ja) * 2012-10-29 2014-05-15 Tsugami Corp 工作機械
CN108380914A (zh) * 2018-04-26 2018-08-10 盐城工业职业技术学院 一种差速器内孔加工组合刀架

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