WO2023223710A1 - 反転装置及び工作機械 - Google Patents

反転装置及び工作機械 Download PDF

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Publication number
WO2023223710A1
WO2023223710A1 PCT/JP2023/014526 JP2023014526W WO2023223710A1 WO 2023223710 A1 WO2023223710 A1 WO 2023223710A1 JP 2023014526 W JP2023014526 W JP 2023014526W WO 2023223710 A1 WO2023223710 A1 WO 2023223710A1
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WO
WIPO (PCT)
Prior art keywords
workpiece
lower receiving
receiving part
reversing device
upper holding
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2023/014526
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English (en)
French (fr)
Japanese (ja)
Inventor
秀貢 河合
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Murata Machinery Ltd
Original Assignee
Murata Machinery Ltd
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Filing date
Publication date
Application filed by Murata Machinery Ltd filed Critical Murata Machinery Ltd
Priority to JP2024521600A priority Critical patent/JPWO2023223710A1/ja
Publication of WO2023223710A1 publication Critical patent/WO2023223710A1/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
    • 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
    • B23Q7/00—Arrangements for handling work specially combined with or arranged in, or specially adapted for use in connection with, machine tools, e.g. for conveying, loading, positioning, discharging, sorting

Definitions

  • the present invention relates to a reversing device and a machine tool.
  • a workpiece is machined at one end and the other end in the axial direction of the central axis.
  • the workpiece is transferred to the spindle and one end in the axial direction is processed first, then the workpiece is transferred to the reversing device and reversed, and then the workpiece is transferred to the spindle again and the other end in the axial direction is processed.
  • a reversing device a configuration is known in which, for example, two chucks are used, and the work is first gripped by one chuck, and then the work is transferred to the other chuck, thereby reversing the work.
  • Patent Document 1 describes a configuration in which a chuck of a reversing device pinches the sides of the work and rotates along a horizontal plane to reverse the work.
  • Patent Document 2 describes a configuration in which a support section on which a work is placed rotates along a horizontal plane to invert the work.
  • Patent Document 1 the chuck of the reversing device pinches the sides of the workpiece, so when the workpiece is gripped by the loader chuck of the loader device and conveyed to the reversing device, the chuck of the loader chuck pinches the workpiece with the chuck of the reversing device and then The grip needs to be released.
  • the chuck of the loader chuck pinches the workpiece with the chuck of the reversing device and then The grip needs to be released.
  • Patent Document 2 the workpiece is only placed on the support part, and there is a risk that the workpiece may fall from the support part when the support part is reversed.
  • An object of the present invention is to provide a reversing device and a machine tool that can reverse a workpiece with a simple configuration and easily transfer the workpiece to and from a loader device.
  • a reversing device is a reversing device that holds a cylindrical or disc-shaped workpiece with the axial direction of the central axis of the workpiece as a horizontal direction, and reverses the axial direction of the workpiece in a horizontal plane, A lower receiving part on which a workpiece is placed and abutting at least two places on the lower side of the outer peripheral surface of the workpiece, a rotation mechanism for rotating the lower receiving part about a rotation axis parallel to the vertical direction, and a lower receiving part.
  • an upper holding part provided above the pivot axis relative to the part and abutting at least one upper part of the outer peripheral surface of the workpiece placed on the lower receiving part, the lower receiving part and the upper holding part;
  • the part is relatively movable along the pivot axis, and when the workpiece is sandwiched between the lower receiver part and the upper presser part, the lower receiver part is rotated around the pivot axis by the rotation mechanism. Turn the workpiece over.
  • a machine tool is a machine tool that processes a cylindrical or disc-shaped workpiece, and includes a main shaft that holds and rotates the workpiece, and the above-mentioned reversing device.
  • the workpiece is easily reversed by rotating the lower receiving part around the pivot axis using the rotation mechanism while the workpiece is sandwiched between the lower receiving part and the upper holding part.
  • the workpiece can be reversed with this configuration.
  • since the workpiece can be placed on the lower receiving section there is no need to consider the timing of gripping or releasing the workpiece when transferring the workpiece to and from the loader device, simplifying control over the transfer of the workpiece. can be converted into
  • the lower receiving part includes two contact parts that contact two places on the lower side of the outer peripheral surface of the workpiece, and the two contact parts are arranged on both sides of the rotation axis.
  • a space is provided between the two abutting parts, which are arranged in symmetrical positions, into which the claw part of the loader device enters and allows the claw part to grip or release the workpiece placed on the lower receiving part. may be provided.
  • each of the two contact portions may have an inclined surface that slopes upward as the distance from the rotation axis increases. According to this configuration, even when the diameters of the workpieces are different, the workpieces can be stably held.
  • each of the two contact portions may have a width equal to or larger than a predetermined dimension in the axial direction of the central axis of the workpiece. According to this configuration, when the workpiece is placed on the lower receiving part, the workpiece is stably supported, so that falling of the workpiece can be avoided. Further, in the reversing device according to the above aspect, the lower receiving part may be fixed in position in the vertical direction, and the upper pressing part may be movable in the vertical direction. According to this configuration, the workpiece is held without moving the lower receiving part, so the configuration can be simplified.
  • the reversing device may include a measuring section that measures the outer diameter of the workpiece based on the relative movement amount between the lower receiving section and the upper holding section. According to this configuration, the outer diameter of the workpiece is measured at the timing when the workpiece is sandwiched between the lower receiving part and the upper holding part, so that the outer diameter dimension of the workpiece can be easily confirmed at the time of reversal.
  • the upper presser portion is provided at the vertical rod-shaped portion extending along the rotation axis, or at the lower end of the vertical rod-shaped portion and the vertical rod-shaped portion, and extends linearly in a direction perpendicular to the rotation axis. It may have an extending horizontal rod-shaped portion. According to this configuration, the upper side of the workpiece can be stably pressed downward by the vertical rod-shaped portion or the horizontal rod-shaped portion.
  • the reversing device according to the above aspect may include an upper rotation mechanism that rotates the upper presser part about the rotation axis in synchronization with the rotation of the lower receiving part about the rotation axis.
  • the workpiece can be stably reversed with the workpiece being sandwiched between the upper holding part and the lower receiving part.
  • the workpiece placed on the lower receiving part can be moved forward and backward with respect to positions sandwiching both sides of the work in the axial direction, and the upper rotating mechanism allows the workpiece to be moved forward and backward together with the lower receiving part and the upper holding part.
  • a shutter rotatable around the pivot axis may be provided. According to this configuration, when the workpiece shifts from the lower receiving part, it hits the shutter, so it is possible to prevent the workpiece from coming off the lower receiving part.
  • the machine tool since it is equipped with the reversing device according to the above aspect, even if the size of the workpiece changes due to setup change, it can be held between the lower receiving part and the upper holding part, so chuck replacement etc. is no longer necessary, and the work load can be reduced.
  • the reversing device may be arranged above the main spindle so that the vertical direction perpendicular to the rotational axis of the main spindle coincides with the rotation axis. According to this configuration, there is no need to move the workpiece in the horizontal direction between the main shaft and the reversing device, so the workpiece can be easily transported in the loader device.
  • FIG. 1 is a perspective view showing an example of a reversing device according to an embodiment.
  • FIG. 3 is a front view showing an example of a main part of the reversing device. It is a side view which shows the state mounted on the lower side receiving part.
  • FIG. 3 is a front view showing the relationship between the loader chuck and the claw portion.
  • FIG. 3 is a side view showing an example of a measuring section.
  • FIG. 2 is a side view showing an example of a shutter.
  • FIG. 3 is a front view showing the operation of the shutter.
  • FIG. 6 is a diagram illustrating an example of adjusting the shutter interval.
  • FIG. 7 is a diagram showing a workpiece placed on a lower receiving part by a loader device when the reversing device is in use.
  • FIG. 7 is a diagram showing a workpiece placed on a lower receiving part by a loader device when the reversing device is in use.
  • FIG. 7 is a diagram showing a
  • FIG. 3 is a diagram showing a workpiece released from being gripped by a loader chuck. It is a diagram in which the workpiece is inverted.
  • FIG. 3 is a diagram showing a workpiece being gripped by a loader device.
  • FIG. 3 is a diagram showing a workpiece received by a loader device.
  • FIG. 7 is a front view showing another example of the upper holding part.
  • FIG. 1 is a perspective view showing an example of a machine tool according to an embodiment.
  • the direction perpendicular to the XZ plane is expressed as the Y direction.
  • the X direction, Y direction, and Z direction will be described assuming that the direction indicated by the arrow in the figure is the + direction, and the direction opposite to the direction indicated by the arrow is the - direction.
  • FIG. 1 is a perspective view showing an example of a reversing device 100 according to the present embodiment.
  • the reversing device 100 holds a cylindrical or disc-shaped workpiece W to be processed with the axial direction of the central axis AX2 of the workpiece W as a horizontal direction, and the axial direction of the workpiece W is Flip in the horizontal plane.
  • the reversing device 100 includes a lower receiving part 10, a rotation mechanism 20, an upper pressing part 30, a lifting mechanism 40, and a control part 50.
  • the lower receiving part 10 receives the lower side of the workpiece W.
  • the workpiece W is placed on the lower receiving part 10, and the lower receiving part 10 contacts at least two places on the lower side of the outer circumferential surface of the workpiece W.
  • the lower receiving part 10 is arranged on the base 61 via a rotation mechanism 20 which will be described later.
  • the lower receiving part 10 has a fixed vertical position and does not move up or down.
  • the lower receiving part 10 has an abutting part 11 at the upper part.
  • the contact portion 11 contacts two locations on the lower side of the outer peripheral surface of the workpiece W.
  • Each contact portion 11 has a shape extending upward along a direction parallel to the rotation axis AX1, and is arranged at a target position across the rotation axis AX1.
  • Each contact portion 11 has a width equal to or larger than a predetermined dimension D in the axial direction of the central axis AX2 of the workpiece W.
  • the predetermined dimension D is set, for example, to an arbitrary length that can support the placed workpiece W. With this configuration, when the work W is placed on the lower receiving part 10, the work W is stably supported. Therefore, the workpiece W can be prevented from falling from the contact portion 11.
  • Each contact portion 11 has an inclined surface 11a.
  • the inclined surface 11a slopes upward as it moves away from the pivot axis AX1.
  • Each inclined surface 11a is arranged at a symmetrical position across the rotation axis AX1. The inclined surface 11a abuts on two lower parts of the outer circumferential surface of the workpiece W, respectively.
  • the workpiece W is supported while in contact with the two inclined surfaces 11a.
  • the inclined surface 11a By providing the inclined surface 11a, it becomes possible to stably hold the workpiece W even when the diameter of the workpiece W is different.
  • the length of the workpiece W in the direction of the central axis AX2 is longer than the predetermined dimension D of the contact portion 11, but if the length of the workpiece W is longer than the predetermined dimension D Even if the length is short, the workpiece W is similarly supported by each of the inclined surfaces 11a abutting on the lower two locations of the outer circumferential surface of the workpiece W.
  • a space 12 is provided between the two contact parts 11.
  • a claw portion 243a of a loader chuck 243 provided in a loader device 240 enters the space portion 12, and allows the claw portion 243a to grip or release a workpiece W placed on the lower receiving portion 10.
  • interference between the claw portion 243a of the loader device 240 and the lower receiving portion 10 can be avoided. Note that details of the space portion 12 will be described later.
  • the rotation mechanism 20 rotates the lower receiving part 10 around a rotation axis AX1 parallel to the vertical direction.
  • the rotation mechanism 20 includes a rotation table 21 and a rotation drive section 22.
  • the rotary table 21 has a disc shape, for example, and is arranged on the base 61.
  • the rotary table 21 supports the lower receiving part 10 on the upper surface side.
  • the rotary table 21 may be formed integrally with the lower receiving part 10, or may be formed separately and the lower receiving part 10 may be attached to the upper surface thereof.
  • the rotary table 21 is integral with the lower receiving portion 10 and is rotatable around the pivot axis AX1.
  • the rotation drive section 22 rotates the rotary table 21.
  • the rotation drive unit 22 includes a drive source such as a motor, and a transmission mechanism that transmits the drive force generated by the drive source to the rotary table 21.
  • the upper holding part 30 comes into contact with at least one upper part of the outer peripheral surface of the workpiece W placed on the lower receiving part 10.
  • the upper holding part 30 is provided on the base 61 via the lifting mechanism 40 and the support column 62.
  • the upper presser part 30 is arranged directly above the lower receiving part 10, but may be arranged away from directly above the lower receiving part 10.
  • the upper holding part 30 is movable in the vertical direction by a lifting mechanism 40. As described above, the vertical position of the lower receiving part 10 is fixed. Therefore, as the upper holding part 30 moves up and down in the vertical direction, the lower receiving part 10 and the upper holding part 30 are relatively movable along the pivot axis AX1. Note that instead of the upper holding part 30 moving up and down in the vertical direction, the lower receiving part 10 may be moved up and down, or both the upper holding part 30 and the lower receiving part 10 may be moved up and down.
  • the upper holding part 30 has a horizontal bar-shaped part 31 and a vertical bar-shaped part 32.
  • the horizontal rod-shaped portion 31 is used as a portion that comes into contact with the workpiece W.
  • the vertical rod-shaped portion 32 is provided so as to extend along the axial direction of the pivot axis AX1.
  • the horizontal rod-shaped portion 31 is provided at the lower end of the vertical rod-shaped portion 32 and has a shape that extends linearly in a direction perpendicular to the rotation axis AX1.
  • the horizontal bar-shaped portion 31 is connected to the vertical bar-shaped portion 32 at the upper side of the central portion in the longitudinal direction.
  • the vertical rod-shaped portion 32 may be rotatably held relative to the elevating member 41 around the pivot axis AX1. That is, the upper holding part 30 may be rotated around the pivot axis AX1 together with the rotation of the lower receiving part 10 (rotation of the workpiece W) while in contact with the workpiece W.
  • the lifting mechanism 40 moves the upper holding part 30 in the vertical direction.
  • the elevating mechanism 40 includes an elevating member 41 and an elevating drive section 42.
  • the elevating member 41 is held by a support 62.
  • the elevating member 41 is provided so as to be movable vertically along an elevating guide (not shown) provided on the support column 62 .
  • the elevating drive section 42 moves the elevating member 41 up and down.
  • As the elevating drive unit 42 for example, a cylinder device, a ball screw mechanism using an electric rotary motor, or the like is used.
  • the elevating member 41 moves up and down, the horizontal bar-shaped portion 31 and the vertical bar-shaped portion 32 also move up and down as one unit.
  • the control unit 50 controls the rotation drive unit 22 of the rotation mechanism 20 and the elevation drive unit 42 of the elevation mechanism 40.
  • the control unit 50 instructs the lower receiving part 10 and the upper holding part 30 to sandwich the work W by lowering the upper holding part 30 with the work W placed on the lower receiving part 10.
  • the control unit 50 rotates the lower receiving portion 10 around the rotation axis AX1 using the rotating mechanism 20, with the work W sandwiched between the lower receiving portion 10 and the upper holding portion 30, thereby reversing the work W. instruct them to do so.
  • FIG. 2 is a front view showing an example of the essential parts of the reversing device 100.
  • FIG. 2 shows an example in which the upper side of the workpiece W is held down by the upper holding part 30 with the workpiece W placed on the lower receiving part 10.
  • the workpiece W comes into contact with three places: the inclined surface 11a of each contact portion 11 of the lower receiving portion 10 and the lower surface 31a of the horizontal rod-shaped portion 31 of the upper holding portion 30.
  • the workpiece W is supported in a state in which it is in contact with the contact point P1 in each contact portion 11 of the lower receiving portion 10.
  • the workpieces WA and WB having smaller diameters than the workpiece W are supported in contact with each other at two locations at the contact points P2 and P3 in each contact portion 11. In this way, even when the diameters of the workpieces W are different, the workpieces W can be stably supported in a state where the workpieces W are in contact with different positions (contact points P1, P2, P3) on the inclined surface 11a.
  • the upper holding part 30 contacts the upper outer circumferential surface of the work W (WA, WB) even if the work W has a different diameter. Note that when the diameters of the workpieces W are different, the lower receiving part 10 does not move in the vertical direction, so the amount of descent of the upper holding part 30 is different. Therefore, even if the work W has different diameters, it is held stably because it is sandwiched between two places on the lower outer circumferential surface and one place on the upper outer circumferential surface.
  • the space 12 between the two contact parts 11 has a width L such that the claw part 243a of the loader chuck 243 of the loader device 240 can enter therein.
  • the height H in the vertical direction of the space portion 12 is set so as to ensure the opening/closing stroke of the claw portion 243a. Therefore, when transferring the workpiece W using the loader chuck 24, interference between the claw portion 243a and the lower receiving portion 10 can be avoided.
  • the width L and height H of the space portion 12 are appropriately set depending on the size and downward stroke of the claw portion 243a of the loader chuck 243 of the loader device 240 used.
  • FIG. 3 is a side view showing a state in which the workpiece W gripped by the loader chuck 243 is placed on the lower receiving part 10.
  • FIG. 4 is a front view showing the relationship between the loader chuck 243 and the claw portion 243a.
  • FIGS. 3 and 4 when the workpiece W is held by the lower receiving part 10 and the upper holding part 30, there is a space around the workpiece W between the contact parts 11 of the lower receiving part 10. A space 12 is ensured, and a space on both sides of the upper presser 30 (a space that does not interfere with the upper presser 30).
  • FIG. 3 is a side view showing a state in which the workpiece W gripped by the loader chuck 243 is placed on the lower receiving part 10.
  • FIG. 4 is a front view showing the relationship between the loader chuck 243 and the claw portion 243a.
  • the claw portion 243a of the loader chuck 243 is a three-sided claw that has an opening/closing stroke at one location on the lower side and two locations on the upper side in the radial direction with respect to the central axis AX2 of the workpiece W.
  • the claw portion 243a can move the work W between the reversing device 100 and the reversing device 100 without interfering with the lower receiving portion 10 and the upper holding portion 30. can be exchanged.
  • FIG. 5 is a side view showing an example of the measurement section 60.
  • the reversing device 100 may include a measuring section 60 that measures the outer diameter of the workpiece W based on the relative movement amount between the lower receiving section 10 and the upper holding section 30.
  • the measuring section 60 measures the moving distance of the upper presser section 30 from the initial position until it comes into contact with the upper side of the workpiece W, that is, the moving distance of the lifting member 41 of the lifting mechanism 40, and determines the outer diameter of the workpiece W based on the measurement result. Calculate.
  • the measurement unit 60 transmits the calculation result to the control unit 50. According to this configuration, the outer diameter of the workpiece W is measured at the timing when the workpiece W is sandwiched between the lower receiving part 10 and the upper holding part 30, so the outer diameter dimension of the workpiece W to be reversed can be easily confirmed.
  • the elevation drive unit 42 may be used as the measurement unit 60.
  • the control unit 50 instructs the lifting drive unit 42 to lower the lifting member 41, monitors the state in which the upper presser part 30 hits the work W and cannot be lowered, and monitors, for example, the pressure value by the cylinder device, the electric It is determined that the upper presser part 30 has hit the workpiece W from the torque value of the rotating motor, and the outer diameter of the workpiece W is measured by calculating the amount of descent of the elevating member 41 from the amount of drive until it hits the workpiece. Good too.
  • FIG. 6 is a side view showing an example of the shutters 81 and 82.
  • FIG. 7 is a front view showing the operation of the shutters 81 and 82.
  • the reversing device 100 may include an upper rotation mechanism 70 and a shutter mechanism 80.
  • the upper rotation mechanism 70 can rotate the upper holding part 30 around the rotation axis AX1 in synchronization with the rotation of the lower receiving part 10 around the rotation axis AX1.
  • the upper rotation mechanism 70 has a base 71 and an upper rotation drive section 72.
  • the base portion 71 is provided on the elevating member 41 of the elevating mechanism 40 and is rotatable together with the lower receiving portion 10 around the pivot axis AX1.
  • the base 71 may fix the vertical bar-shaped portion 32 of the upper presser 30, or may rotate the upper presser 30 around the pivot axis AX1 as the base 71 rotates.
  • the base portion 71 protrudes from the vertical rod-shaped portion 32 on both sides in the axial direction of the central axis AX2 of the workpiece W.
  • the upper rotation drive unit 72 rotates the base 71 in a direction around the rotation axis AX1.
  • As the upper rotation drive unit 72 for example, an electric motor (not shown) or the like is used.
  • the control unit 50 causes the upper rotation drive unit 72 to rotate the base 71 in synchronization with the rotation of the rotary table 21 by the rotation drive unit 22 (see FIG. 1).
  • the shutter mechanism 80 includes shutters 81 and 82 and a shutter drive section 83.
  • the shutters 81 and 82 are supported by the base 71 of the upper rotation mechanism 70.
  • the shutters 81 and 82 are arranged on the base 71 at positions sandwiching the upper presser part 30 therebetween.
  • the shutters 81 and 82 are provided so as to be movable up and down in a direction parallel to the rotation axis AX1.
  • the shutter drive unit 83 moves the shutters 81 and 82 up and down.
  • a cylinder device or the like is used, for example.
  • the shutters 81 and 82 are moved up and down along the axial direction of the rotation axis AX1 by the shutter driving section 83, and are placed in positions sandwiching both sides of the central axis AX2 of the workpiece W placed on the lower receiving section 10 in the axial direction. It is possible to advance and retreat respectively.
  • the shutters 81 and 82 are rotatable together with the lower receiving part 10 and the upper pressing part 30 in the direction around the rotation axis AX1 by the upper rotating mechanism 70.
  • the shutter mechanism 80 has shutter receiving parts 84 and 85 that receive the lower ends of the shutters 81 and 82 that have been lowered. As shown in FIGS. 6 and 7, the shutter receivers 84 and 85 protrude from both sides of the contact portion 11 of the lower receiver 10 and are provided with the space 12 left open.
  • FIG. 8 is a diagram showing an example of adjusting the interval between the shutters 81 and 82.
  • shutters 81 and 82 are provided movably along base 71 of upper rotation mechanism 70.
  • the distance between the shutters 81 and 82 can be adjusted, for example, according to the length of the central axis AX2 of the workpiece W in the axial direction.
  • the positions of the shutters 81 and 82 can be adjusted according to the length of the workpiece W, so the shutters 81 and 82 can be appropriately arranged with respect to the workpiece W, and falling of the workpiece W can be reliably prevented.
  • the operating state of the reversing device 100 will be explained with reference to FIGS. 9 to 13.
  • the workpiece W is conveyed to above the lower receiving part 10 while the workpiece W is gripped by the claw part 243a of the loader chuck 243 provided in the loader head 241 of the loader device 240, and then the loader head 241 is lowered and the work W is placed on the contact part 11 of the lower receiving part 10.
  • the loader chuck 243 directs the first portion Wa of the workpiece W toward the reversing device 100 and grips the second portion Wb.
  • the lower claw 243a enters the space 12 of the two contact parts 11, so interference between the claws 243a and the contact parts 11 is prevented. It is prevented. Note that details of the loader device 240 will be described later.
  • the claw portion 243a of the loader chuck 243 is opened to release the grip on the workpiece W.
  • the workpiece W is held on the contact portion 11.
  • the contact portion 11 has a width equal to or larger than the predetermined dimension D (see FIG. 3)
  • the workpiece W is simply placed on the contact portion 11 and held.
  • a first portion Wa is placed on the back side of the reversing device 100, and a second portion Wb is placed on the front side.
  • the upper holding part 30 is lowered to sandwich the workpiece W between the lower receiving part 10 and the upper holding part 30.
  • the lowering of the upper presser portion 30 may be performed before the loader head 241 is separated from the reversing device 100, for example, at a timing when the workpiece W is being gripped by the loader chuck 243.
  • the lower receiving part 10 is rotated by 180 degrees around the rotation axis AX1 by the rotation mechanism 20.
  • the upper holding part 30 may be rotated in synchronization with the rotation of the lower receiving part 10.
  • the first portion Wa of the work W is on the front side, and the second portion Wb is on the back side. That is, the workpiece W is in an inverted state.
  • the shutters 81 and 82 are lowered to cover both sides of the work W by the shutters 81 and 82 before reversing the work W. Make it.
  • the shutters 81 and 82 are lowered at the timing when the loader head 241 is separated from the reversing device 100. Even if the workpiece W comes off from between the lower receiving part 10 and the upper holding part 30 when the workpiece W is reversed, the workpiece W is prevented from falling by hitting the shutters 81 and 82. .
  • the shutters 81 and 82 are raised at the timing after the workpiece W is reversed. As a result, the workpiece W becomes able to be gripped by the loader head 241.
  • the loader head 241 is moved and the workpiece W is gripped by the loader chuck 243.
  • the lower claw 243a of the three claws 243a of the loader chuck 243 enters the space 12, so interference between the claw 243a and the contact portion 11 is prevented.
  • Ru The claw portion 243a of the loader chuck 243 grips the first portion Wa of the workpiece W.
  • the upper presser portion 30 is raised. Note that the timing for raising the upper presser portion 30 may be at the same time as the loader chuck 243 grips the workpiece W, or may be before the loader chuck 243 grips the workpiece W.
  • the loader head 241 rises a little while gripping the workpiece W, and then moves in a direction away from the reversing device 100.
  • the loader head 241 can transport the workpiece W in an inverted state. Note that this series of operations may be automatically performed by the control unit 50, or all or part of the series of operations may be manually operated by the operator.
  • the lower receiving part 10 is rotated around the rotation axis AX1 by the rotating mechanism 20 with the workpiece W being sandwiched between the lower receiving part 10 and the upper holding part 30. Since the workpiece W is reversed by turning, the workpiece W can be stably reversed with a simple configuration. Further, since the workpiece W can be placed on the lower receiving part 10, there is no need to strictly control the timing of gripping or releasing the workpiece W when transferring the workpiece W to and from the loader device 240. Control regarding the delivery of the workpiece W can be simplified.
  • the upper holding part 30 has a horizontal bar-shaped part 31 and a vertical bar-shaped part 32, and the lower surface 31a of the horizontal bar-shaped part 31 is in contact with the work W. , but not limited to this form.
  • FIG. 14 is a front view showing another example of the upper holding part 30.
  • the upper holding part 30 uses a vertical rod-shaped part 32 as a part that comes into contact with the work W.
  • the horizontal bar-shaped portion 31 is not provided at the lower end of the vertical bar-shaped portion 32.
  • the lower end surface 32a of the vertical rod-shaped part 32 comes into contact with the workpiece W.
  • FIG. 15 is a front view showing an example of the machine tool 300 according to the embodiment.
  • the machine tool 300 shown in FIG. 15 is a parallel two-axis lathe.
  • the machine tool 300 is not limited to a parallel two-axis lathe, and may be a lathe with a single machining axis or a two-axis opposed lathe.
  • the machine tool 300 includes a reversing device 100, a carry-in section 210, a main body section 220, a carry-out section 230, a loader device 240, and a control section 250.
  • the control unit 250 controls the machine tool 300 in an integrated manner, and may include, for example, the control unit 50 shown in FIG. 1.
  • the carry-in section 210 places the work W to be processed by the main body section 220.
  • the carry-in section 210 has a mounting table 211 that holds the work W.
  • An unprocessed workpiece W is held on the mounting table 211 .
  • the carry-in section 210 is provided so that the unprocessed workpiece W can be delivered to the loader device 240.
  • the main body part 220 processes the workpiece W using the tool T.
  • the main body portion 220 includes main shafts 213 and 214, turrets 215 and 216, and a reversing device 100.
  • the main shafts 213 and 214 are arranged side by side in the X direction, and are supported rotatably around a rotation axis AXS parallel to the Z direction by a bearing or the like (not shown).
  • Chucks 213a and 214a are provided at the -Z side ends of the main shafts 213 and 214, respectively.
  • the chucks 213a and 214a hold or release the workpiece W by being opened and closed by a drive unit (not shown).
  • the loader device 240 transfers the workpiece W to each of these chucks 213a and 214a.
  • the turret 215 is arranged on the -X side of the main shaft 213.
  • the turret 216 is arranged on the +X side of the main shaft 214.
  • Each of the turrets 215 and 216 is rotatable around an axis parallel to the Z direction by a drive device (not shown). Further, the turrets 215 and 216 are movable in the X direction and the Z direction by a drive device (not shown).
  • a plurality of holding parts for holding the tool T are provided on the circumferential surfaces of the turrets 215 and 216. The tool T is held in all or part of these holding parts. Therefore, a desired tool T is selected by rotating the turrets 215 and 216.
  • the tool T is replaceable for each holding part.
  • the tool T may be a cutting tool for cutting the workpiece W, or a rotary tool such as a drill or an end mill.
  • the reversing device 100 is provided in the main body portion 220.
  • the reversing device 100 is arranged above the main shaft 213 so that the vertical direction perpendicular to the rotation axis AXS of the main shaft 213 coincides with the rotation axis AX1. According to this configuration, there is no need to move the work W in the X direction between the main shaft 213 and the reversing device 100, so the work W can be easily transported in the loader device 240.
  • the reversing device 100 is arranged above the main shaft 213 in this embodiment, it may be arranged above the main shaft 214. That is, the reversing device 100 may be arranged above the main shaft 214 so that the vertical direction perpendicular to the rotation axis AXS of the main shaft 214 coincides with the rotation axis AX1.
  • the reversing device 100 may be provided outside the main body portion 220.
  • the reversing device 100 can be placed at any position within a range where the workpiece W can be transferred to and from the loader device 240.
  • the reversing device 100 may be arranged between the loading section 210 and the main body section 220 or between the main body section 220 and the unloading section 230.
  • the unloading section 230 places the workpiece W processed by the main body section 220.
  • the unloading section 230 has a mounting table 231 that holds the processed workpiece W.
  • a processed workpiece W is held on the mounting table 231 .
  • the mounting table 231 is provided so as to be able to receive the workpiece W from the loader device 240.
  • the loader device 240 transports the workpiece W between the loading section 210, the main body section 220, and the unloading section 230. Further, the loader device 240 transports the workpiece W between the main shafts 213 and 214 and the reversing device 100.
  • the loader device 240 includes a loader head 241 and a loader drive section 242.
  • the loader head 241 has two loader chucks 243.
  • the loader chuck 243 has a claw portion 243a that grips the work W.
  • the two loader chucks 243 are provided, for example, on a swivel joint, and have one orientation in which the workpiece W to be gripped is directed downward (-Y side) and one in which the workpiece W to be gripped is directed toward the spindles 213 and 214 (-Z side). It is possible to change the posture.
  • the loader device 240 transfers the workpiece W to and from the reversing device 100, the loader device 240 carries out the workpiece W in a posture facing the ⁇ Z side.
  • the loader drive unit 242 includes an X drive unit 244, a Z drive unit 245, and an elevation drive unit 246.
  • the X drive section 244 includes an X slider 244a and a guide rail 244b.
  • the X slider 244a moves in the X direction along the guide rail 244b by a drive unit (not shown).
  • the Z drive section 245 has a Z slider 245a that moves in the Z direction by a drive section (not shown) along a Z guide (not shown) provided in the X slider 244a.
  • the elevating drive unit 246 includes an elevating rod 246a that is moved up and down by a drive unit (not shown) along an elevating guide provided in the Z slider 245a.
  • the loader chuck 243 is provided at the lower end of the lifting rod 246a.
  • the loader drive unit 242 transports the workpiece W by moving in the X direction by the X slider 244a, moving in the Z direction by the Z slider 245a, moving up and down (movement in the Y direction) by the lifting rod 246a, or in a direction that is a combination of these.
  • the loader drive unit 242 transports the processed work W to the reversing device 100 using the main shaft 213, receives the work W reversed by the reversing device 100, and transports the work W to the main shaft 214.
  • the loader drive unit 242 when receiving the workpiece W from the main shaft 213 and transporting it to the reversing device 100, the loader drive unit 242 only needs to operate in the Z direction and the Y direction (up), and does not need to move in the X direction. Therefore, the operation between the main shaft 213 and the reversing device 100 can be simplified, and the control by the control unit 250 can be simplified.
  • the machine tool 300 since the machine tool 300 according to the present embodiment includes the above-described reversing device 100, even if the size of the workpiece W differs due to changeover, for example, the lower receiving part 10 and the upper holding part 30, it can be easily reversed. Therefore, there is no need to replace the chuck, which is required in conventional reversing devices using a chuck, and the work burden on the operator can be reduced.
  • the lower receiving part 10 is described using the two contact parts 11 on the left and right as an example, but the present invention is not limited to this form.
  • a contact portion 11 having a width equal to or larger than a predetermined dimension D on each of the left and right sides may be provided. good.
  • each of the upper ends of the plate-shaped member may be provided with the same inclined surface 11a, and the workpiece W may be placed thereon by contacting the lower side of the outer peripheral surface of the workpiece W.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Feeding Of Workpieces (AREA)
PCT/JP2023/014526 2022-05-16 2023-04-10 反転装置及び工作機械 Ceased WO2023223710A1 (ja)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4878571U (enrdf_load_stackoverflow) * 1971-12-28 1973-09-27
JPS60150941A (ja) * 1984-01-19 1985-08-08 Murata Mach Ltd ロボツトによる工作機械へのワ−クの供給方法
JPH04118905U (ja) * 1991-04-09 1992-10-23 村田機械株式会社 旋盤用ワーク反転装置
JP2002172560A (ja) * 2000-12-05 2002-06-18 Nsk Ltd トロイダル型無段変速機用トラニオンの加工方法及びその装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4878571U (enrdf_load_stackoverflow) * 1971-12-28 1973-09-27
JPS60150941A (ja) * 1984-01-19 1985-08-08 Murata Mach Ltd ロボツトによる工作機械へのワ−クの供給方法
JPH04118905U (ja) * 1991-04-09 1992-10-23 村田機械株式会社 旋盤用ワーク反転装置
JP2002172560A (ja) * 2000-12-05 2002-06-18 Nsk Ltd トロイダル型無段変速機用トラニオンの加工方法及びその装置

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