WO2022097190A1

WO2022097190A1 - Tool main shaft device

Info

Publication number: WO2022097190A1
Application number: PCT/JP2020/041163
Authority: WO
Inventors: 白木翔平
Original assignee: 株式会社Fuji
Priority date: 2020-11-04
Filing date: 2020-11-04
Publication date: 2022-05-12
Also published as: JPWO2022097190A1

Abstract

This tool main shaft device comprises: a main shaft head in which is provided a main shaft motor that rotates a mounted main shaft head tool; a table which rotatably supports the main shaft head; a receiving member which is fixed to a rotating member of the table that transmits rotation to the main shaft head, and which guides a cable of the main shaft motor along the axial center thereof; a rotation support member which rotationally supports the receiving member on the opposite side of the table from the rotating member; and a guide member which is fixed to the receiving member, which leads the cable in a direction orthogonal to said axial center, and which guides the cable to rotate in said axial center.

Description

Tool spindle device

The present invention relates to a tool spindle device having a wiring structure corresponding to a power cable or the like extending from a spindle head that rotates according to workpiece processing.

Examples of the tool spindle device having a wiring structure corresponding to a power cable or the like include those disclosed in Patent Document 1 below. This tool spindle device has a configuration in which a spindle head provided with a tool spindle for mounting a rotary tool such as a drill can be swiveled with respect to a base portion. The drive motor that rotates the tool spindle is a built-in type in order to make the configuration suitable for miniaturization of the spindle head. However, the built-in motor of the swingable spindle head needs to correspond to the wiring structure for the power cable extending from the built-in motor through the base portion. This is because it is necessary to absorb the turning motion and movement of the spindle head so that an excessive force is not applied to the power cable or the like.

In this respect, in the conventional tool spindle device, a swivel wiring box serving as a swivel connector is fixed to the tip of a cable protection pipe fixed to the swivel shaft portion. Electric cables and air hoses extending from the spindle head are guided to the swivel wiring box through the hollow holes of the swivel shaft and cable protection pipe, and cables that cannot be twisted are twisted via the connector in the box. The reconnection is made to one or more cables that are allowed, and the cables are led to the mobile wiring box through the inside of the soft protective cover.

Japanese Unexamined Patent Publication No. 2011-11285

In a tool spindle device where the spindle head is swiveled when the tool is rotated or coolant is ejected, the cable or the like is twisted and an unreasonable force is locally applied. Therefore, various measures have been taken so far to prevent the cables and the like from being twisted and damaged. Also in the above-mentioned conventional example, a cable that allows twisting is used as the cable between the swivel wiring box and the mobile wiring box. However, it is not clear from the conventional example how to handle cables that cannot be twisted, and it is required to provide a more realistic configuration.

Therefore, an object of the present invention is to provide a tool spindle device having a wiring structure corresponding to a power cable extending from a swivel spindle head in order to solve such a problem.

The tool spindle device according to one aspect of the present invention includes a spindle head having a built-in spindle motor that gives rotation to the mounted spindle head tool, a table that rotatably supports the spindle head, and the spindle head that transmits rotation to the spindle head. A receiving member that is fixed to the rotating member of the table and guides the cable of the spindle motor along the center of the axis, a rotating support member that rotationally supports the receiving member on the opposite side of the rotating member of the table, and the receiving member. It has a guide member which is fixed to the center of the shaft, guides the cable in a direction orthogonal to the center of the shaft, and guides the cable to rotate around the center of the shaft.

According to the above configuration, when the spindle head rotatably supported by the table swings, the cable extending from the spindle motor built in the spindle head is fixed to the rotating member along the center of the shaft. It is possible to prevent a local unreasonable force from being applied to the cable even if the spindle head swings, because the spindle head is mounted on the cable and held by the guide member and swings and deforms together.

It is a perspective view which showed the main structure of a compound processing machine. It is a side view which showed one Embodiment of a tool spindle device. It is a perspective view which showed the tool spindle device including the wiring structure through which a cable etc. passes. It is a perspective view which showed the tool spindle device including the wiring structure through which a cable etc. passes. It is a perspective view which showed a part of the wiring structure. It is a perspective view which showed a part of the wiring structure.

An embodiment of the tool spindle device according to the present invention will be described below with reference to the drawings. The tool spindle device of this embodiment constitutes a part of a multi-tasking machine. FIG. 1 is a perspective view showing the main structure of the multi-tasking machine. The multi-tasking machine 1 is a machine tool having both functions of an NC lathe and a machining center. Specifically, the first work spindle device 3 and the second work spindle device 4 for gripping the work W, and the first turret device 5 and the second turret device 6 having a plurality of tools T are arranged symmetrically. In addition to the opposed two-screw lathe, the tool spindle device 2 is provided in the center of the machine body.

The first and second

work spindle devices

3 and 4 have the same structure, a spindle is rotatably incorporated in the headstock 22, and a chuck mechanism 21 for gripping and releasing the work W to be machined is assembled therein. There is. The spindle is rotated by the drive of the spindle motor 23, and is given a phase determination at the time of machining and rotation at a predetermined speed with respect to the work W gripped by the chuck mechanism 21. The headstock 22 and the spindle motor 23 are mounted on the spindle slide 24, and the spindle slide 24 that slides along the guide rail 25 fixed to the front inclined surface 11 of the bed 7 is a screw shaft that is rotated by the Z-axis servomotor 28. It is configured to move in the Z-axis direction, which is the width direction of the machine body, by the ball screw mechanism of 27.

Next, in the first turret device 5 and the second turret device 6, a plurality of tools T (turret tools) are attached to the turret 31 at equal intervals in the circumferential direction, and are arbitrarily controlled by the rotation control of the indexing servomotor 32. Tool T is configured to be positioned at a machining position on the circumference. The first and

second turret devices

5 and 6 are provided with a drive mechanism for moving the turret 31 in two directions orthogonal to the Z axis. The substantially triangular base slide 34 is slidable 45 degrees forward diagonally upward with respect to the bed 7, and the turret slide 37 equipped with the turret 31 is slidably assembled 45 degrees forward diagonally downward with respect to the base slide 34. ing. The base slide 34 and the turret slide 37 are configured to move in each direction by a ball screw mechanism of a screw shaft rotated by each servomotor 39.

FIG. 2 is a side view showing the tool spindle device 2 of the present embodiment. The tool spindle device 2 processes the work W at a depth and an angle that cannot be achieved by the first and

second turret devices

5 and 6. The multi-tasking machine 1 can machine the work W at the same time by the first work spindle device 3 and the second work spindle device 4, and can also replace the tool T (spindle head tool) in the tool spindle device 2. Therefore, the multi-tasking machine 1 is provided with two separation shutters 15 that can be opened and closed so that each device is not affected by coolant, chips, and the like.

The tool spindle device 2 is a built-in type in which the servomotor 51 for the spindle and the tool spindle are built in the spindle head 41, and various tools T are replaced with respect to the tool mounting portion provided at the lower end portion. The spindle head 41 is rotatably attached to the B-axis table 42, and is configured to transmit the rotation of the B-axis motor 43 via a rotation transmission mechanism. When the front-rear direction of the machine orthogonal to the Z-axis is the Y-axis, the tool spindle device 2 can adjust the angle of turning the tool T around the horizontal rotation axis (B-axis) parallel to the Y-axis.

Further, the tool spindle device 2 moves the spindle head 41 in the horizontal Y-axis direction and the vertical X-axis direction in order to move the tool T to the work W gripped by the first and second

work spindle devices

3 and 4. A drive mechanism for driving is provided. A guide rail 36 in the Y-axis direction is fixed on the bed 7, and the guide portion 46 of the movable column 45 is slidably meshed with the bed 7. A vertical guide rail 38 is configured on the front side of the movable column 45, and a guide portion 47 of the B-axis table 42 is slidably meshed with the guide rail 38. Both the movable column 45 and the B-axis table 42 are provided with a ball screw mechanism, and the screw axis in each direction passes through the nut member fixed to the movable column 45 or the B-axis table 42, and the Y-axis servo-motor 48 or the X-axis servo The motor 49 is connected.

In the multi-tasking machine 1, the work W of the input side stocker is carried to the first work spindle device 3 by the work automatic transfer device, and is gripped by the chuck mechanism 21. In the first turret device 5, the tool T selected by driving the turret 31 moves so as to be lowered toward the front side of the machine body, and is positioned at the machining position with respect to the work W. In the first work spindle device 3, the work W gripped by the chuck mechanism 21 is rotated by the drive of the spindle motor 23, and the spindle slide 24 moves along the guide rail 25 in the Z-axis direction with respect to the work W. The tool T is applied to perform a predetermined process.

The first machining of the work W in the first work spindle device 3 is performed by the first turret device 5, the machining by adding the tool spindle device 2, or the machining by only the tool spindle device 2. When the work W is machined by the tool spindle device 2, the turret 31 moves toward the rear side of the machine body and separates from the first work spindle device 3. In the tool spindle device 2, the B-axis table 42 moves in the Y-axis direction and the X-axis direction, and the tool T of the spindle head 41 is carried to the machining position of the first work spindle device 3 with respect to the work W. Then, in the spindle head 41, the vertically downward tool T is tilted at a predetermined angle by the rotation of the B-axis motor 43.

Next, in order to move the work W from the first work spindle device 3 to the second work spindle device 4, both devices approach the center of the machine body, and the second work spindle device is opposed to the first work spindle device 3 that has stopped earlier. 4 goes to pick up the work W, and the chuck mechanisms 21 re-grasp the work W. In the second work spindle device 4, the second machining by the second turret device 6 is executed on the work W as in the first machining, or the machining by the tool spindle device 2 is performed, and the tool spindle device 2 alone is used. Processing is done. At that time, in the tool spindle device 2, the tool T of the spindle head 41 is carried to the machining position with respect to the work W of the second work spindle device 3, and in the spindle head 41, the tool T is rotated at a predetermined angle by the rotation of the B-axis motor 43. Can be tilted to.

In the work machining in the tool spindle device 2, the angle is adjusted by turning the vertically downward tool T up to 95 degrees to the left and right by rotating the B axis. Further, the spindle head 41 equipped with the tool T also moves in the front-rear direction and the up-down direction (Y-axis direction and X-axis direction) along the guide rails 36 and 38.

In the tool spindle device 2, in addition to the power cable, a plurality of various cables and hoses (hereinafter referred to as "cables, etc.") 52 such as a control cable, an air hose, and a coolant hose extend from the spindle head 41 to the rear of the machine body. In particular, in the tool spindle device 2, the servomotor 51 for the spindle outputs a high torque, so that the power cable is thick. Therefore, if the cable or the like 52 is simply wired or piped, the cable or the like 52 becomes a resistance to turning or moving the spindle head 41 when the work of the tool spindle device 2 is machined. On the other hand, the cable or the like 52 is damaged by applying an unreasonable force locally due to an unreasonable twist or displacement. Therefore, the tool spindle device 2 of the present embodiment is provided with a wiring structure in which cables and the like 52 are put together so as to follow the turning and displacement of the spindle head 41.

3 and 4 are perspective views showing a tool spindle device 2 to which a wiring structure for passing a cable or the like 52 is added. In particular, FIG. 3 is a view seen from the front side, and FIG. 4 is a view seen from the rear side. It is a figure. 5 and 6 are perspective views showing a part of the wiring structure. Therefore, first, the cable or the like 52 extends from the spindle head 41 to the rear of the tool spindle device 2 through the B-axis table 42 and the movable column 45. In the wiring structure, in order to support such a cable or the like 52, a receiving member 53 having a shape in which the circular tube shown in FIG. 5 is split in half is used. The receiving member 53 is fixed to the rotating portion of the B-axis table 42 that transmits rotation to the spindle head 41, and is configured to swing integrally with the rotation of the spindle head 41.

The movable column 45 has a vertically long through hole 451 formed in the central portion, and the receiving member 53 extends horizontally to the rear of the machine body through the through hole 451. Therefore, if the spindle head 41 turns and moves up and down, the receiving member 53 located at the center of the swing may swing and move up and down while the cable and the like 52 are mounted so as to be guided to the rear of the machine body. can. A mounting frame 55 is fixed to the guide portion 47 of the B-axis table 42, and the receiving member 53 is rotationally supported by the mounting frame 55. As shown in FIG. 5, the mounting frame 55 is assembled by joining a plurality of square pipes, and three vertical frames 501 extending in the front-rear direction are provided on a guide portion 47 via a fixing bracket 502. It is screwed to both the left and right sides.

Further, in the mounting frame 55, the horizontal frame 503 spanning the vertical frames 501 on both the left and right sides is connected to the opposite side of the fixing bracket 502. The upper and lower

horizontal frames

503a and 503b located on the front side of the machine body have a swing support structure shown in the enlarged portion of FIG. 5 so that the receiving member 53 swings while maintaining a posture parallel to the shaft center O of the spindle head 41. Is provided. A rotation support ring 57 is fixed to the end of the receiving member 53, and cam followers 58 that rotatably support the receiving member 53 via the rotation support ring 57 are attached to the upper and lower

horizontal frames

503a and 503b at three locations. ing. The cam follower 58, which is applied from above to the rotation support ring 57, is attached to a bracket 59 having an elongated hole and is screwed to a horizontal frame 503a. The rotation support ring 57 is a half-divided ring so that a cable or the like 52 placed on the receiving member 53 can pass through.

As shown in FIG. 6, the cable or the like 52 mounted on the receiving member 53 and extending to the rear of the machine body is bent so that the portion passing through the rotation support ring 57 is guided in the direction orthogonal to the axis center O. It is 521. The bent portion 521 is provided with a guide member 61 fixed to the rotation support ring 57 so that local deformation does not occur, and the cable or the like 52 is held so as to be wound around the bent portion 521. Therefore, when the spindle head 41 turns, the cable or the like 52 can be swung while the guide member 61 keeps the shape of the bent portion 521. A cable bear 62 arranged so as to rotate around the center O of the shaft is connected to the guide member 61, and the cable or the like 52 (omitted for convenience in FIG. 6) from the guide portion 61 is the cable bear 62. Is held in.

In the mounting frame 55, a rectangular frame is formed by the horizontal frame 503, and as shown in FIGS. 3 and 4, the guide member 61 and the cable bear 62 are housed therein. In the cable bear 62, the first end portion 621 is connected to the guide member 61, the cable bear 62 hangs downward from the guide member 61, and the second end portion 622 facing upward is connected to the mounting frame 55. In the state shown in FIGS. 4 and 6, the turning angle of the tool T pointing straight down is 0 degrees, and by turning 95 degrees to the left and right, the cable bear 62 is wound up or hangs down. transform.

The cable or the like 52 coming out of the second end 622 is passed over the cable bear 62 and turned to the opposite side, and passes through the movable terminal 63 provided in the mounting frame 55. The cable or the like 52 is held in the fixed terminal 63 so as to be sent downward from the movable terminal 63 to form a U-shaped portion 522 that hangs down greatly. The size of the U-shaped portion 522 is such that the head shaft 41 can be deformed in the front-rear direction and the vertical direction movement for the cable or the like 52.

In the tool spindle device 2 of the present embodiment, when the work W is machined, the spindle head 41 equipped with the tool T moves in the front-rear direction and the vertical direction (Y-axis direction and X-axis direction) of the machine, and further by rotating the B axis. The spindle head 41 swings to adjust the angle of the tool T. Therefore, the wiring structure of the cable or the like 52 can prevent a force that causes damage to the cable or the like 52 that accompanies the movement even if such movement is repeated.

Specifically, even when the spindle head 41 turns, the receiving member 53 swings in accordance with the spindle head 41, and the rotary support ring 57 and the guide member 61 swing integrally. Therefore, the cable or the like 52 mounted on the receiving member 53 and held by the guide member 61 swings in accordance with the spindle head 41, so that no force is locally applied. Further, the portion held by the cable bear 62 does not exert an unreasonable force on the cable or the like 52 that is deformed integrally with the cable bear 62. Further, when the spindle head 41 moves in the front-rear direction and the up-down direction, the U-shaped portion 522 changes according to each movement, but since the movement of the U-shaped portion 522 is large, it is local to the cable or the like 52. No force is applied.

Although one embodiment of the present invention has been described, the present invention is not limited to these, and various modifications can be made without departing from the spirit of the present invention.
For example, in the tool spindle device 2 of the above-described embodiment, the spindle head 41 moves in the front-rear direction and the up-down direction, but may only rotate on the B axis.

1 ... Multi-tasking machine 2 ... Tool spindle device 3 ... 1st work spindle device 4 ... 2nd work spindle device 5 ... 1st turret device 6 ... 2nd turret device 41 ... Spindle head 42 ... B-axis table 45 ... Movable column 51 ... Spindle servo motor 52 ... Cable, etc. 53 ... Receiving member 55 ... Mounting frame 57 ... Rotation support ring 58 ... Cam follower 61 ... Guide member 62 ... Cable bear 63 ... Fixed terminal 521 ... Bending part 522 ... U-shaped part

Claims

Spindle head with a built-in spindle motor that gives rotation to the mounted spindle head tool,
A table that rotatably supports the spindle head,
A receiving member fixed to a rotating member of the table that transmits rotation to the spindle head and guiding a cable of the spindle motor along the center of the axis.
A rotary support member that rotationally supports the receiving member on the opposite side of the rotary member of the table,
A guide member fixed to the receiving member, guiding the cable in a direction orthogonal to the axis center, and guiding the cable to rotate about the axis center.
Tool spindle device with.
The tool spindle device according to claim 1, wherein the guide member has a cable bear connected to an end parallel to the center of the shaft, and holds the cable guided from the spindle head from the guide member through the cable bear.
The first or second aspect of the present invention, wherein the table is movably assembled in a movable column that can move along the horizontal axis center, and the receiving member moves up and down together with the table. Tool spindle device.
The tool spindle device according to any one of claims 1 to 3, wherein the rotation support member is attached to a frame member fixed to the table.
The tool spindle device according to any one of claims 1 to 4, wherein the receiving member has a rotation support ring fixed to an end portion on which the rotation support member rotates and supports.
The tool spindle device according to claim 5, wherein the rotary support ring is a half-split ring.
The cable passes through the cable bear and moves along the axis center of the movable column and the table between the movable terminal formed on the frame member and the fixed terminal provided outside the movable column. The tool spindle device according to any one of claims 3 to 6, which is held so as to have a length that allows the movement in the vertical direction.