JP7152745B2 - Gear processing equipment - Google Patents

Description

The present invention relates to a gear machining apparatus for machining gears.

2. Description of the Related Art Various devices have been proposed for processing a gear by pressing the tool against the gear while synchronously rotating the gear to be machined and the gear-shaped tool.

For example, the applicant of the present application proposes a support member (arbor) to which a gear, which is an object to be processed, is detachably connected, and a first support member that detachably supports the support member and can rotate the support member around an axis. a work support unit, a gear rotation position sensor for detecting the rotational position of the gear supported by the first work support unit, and a gear supported by the first work support unit without changing the rotational position of the gear. a workpiece moving unit for attaching and detaching the gear to and from the support member; and a predetermined phase difference with respect to the rotational position of the gear detected by the gear rotation position sensor while the gear is being detached from the support member by the workpiece moving unit. a control unit that rotates the support member by operating the first work support unit such that the gears are connected with the predetermined phase difference, and the support member is moved from the first work support unit to the machining position a second work support unit disposed at a processing position, detachably supporting the support member and capable of rotationally driving the support member about an axis; and supported by the second work support unit. a tool unit having a tool for machining the gear while rotating while meshing with the gear, wherein the control unit performs operation control so that the support member and the tool rotate synchronously based on the predetermined phase difference. We have proposed a gear machining device that carries out machining (see Patent Document 1 below).

According to the gear machining apparatus, while one gear supported by the second work support unit is being machined by the tool unit, the other gear supported by the first work support unit is machined. The rotational position (phase) of the gear can be set, and the time required for setting the rotational position can be omitted to perform efficient machining.

Furthermore, according to the gear machining apparatus, the gear and support member conveyed from the first work support unit to the second work support unit always have the predetermined phase difference. Therefore, every time the coupled body of the gear and the support member is transferred from the first work support unit to the second work support unit, information about the phase difference between the gear and the support member is transferred from the first work support unit to the second work support unit. Synchronous rotation of the gear supported by the second work support unit and the tool can be realized without the need to transmit to the work support unit.

Japanese Patent No. 6210513

As described above, although the conventional gear machining apparatus has many advantages, there is still room for improvement in terms of workability for exchanging machined gears and unmachined gears.

That is, in the conventional gear machining apparatus, an operator includes the machined gear machined under the cooperation of the second work support unit and the tool unit, and the support member to which the machined gear is connected. The connected body is transported from the second work support unit to the first work support unit by the work transport unit, and the support member of the connected body is processed from the support member in a state of being supported by the first work support unit. The gear is removed, and the unmachined gear to be machined next is mounted on the support member that has become empty.

At this time, the operator holds the machined gear removed from the support member supported by the first work support unit with one hand, and holds the unmachined gear previously held with the other hand. It was necessary to attach it to the support member, and the work of exchanging the machined gear and the unmachined gear was troublesome.

In particular, when the gear to be machined is a heavy object such as a large-diameter gear or a shaft gear, the operator has to hold the heavy object with both hands, which is a heavy burden.

Further, in the conventional gear machining apparatus, the gear before machining is mounted and the rotational position of the gear before machining is set only after the machined gear is removed from the support member supported by the first work support unit. In this respect as well, there is a problem that it is difficult to improve workability.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a gear machining apparatus capable of facilitating the work of exchanging machined gears and unmachined gears.

In order to achieve the above object, the present invention includes a turning member that is rotationally driven around a turning center axis and first to third grippers that are supported by the turning member at equal intervals around the turning center axis. can directly or indirectly detachably support a workpiece including a gear that is an object to be processed and an arbor that detachably supports the gear in a non-rotatable and detachable manner around the axis; a transfer unit configured to sequentially position the respective grippers at the loading position, the processing position, and the discharging position arranged in the a processing unit that transfers the work body between them, supports an arbor of the work body so that it cannot rotate relative to an axis but is detachable, and can rotate the arbor about an axis; a tool unit including a tool for processing the gear by rotating synchronously with the gear mounted on the arbor rotationally driven by the gear and meshing with the gear, the tool unit being disposed at a loading position and detachably supporting the arbor; a carrying-in unit capable of connecting the pre-machined gear to the arbor; and a carrying-out unit arranged at a carrying-out position to detachably support the arbor and capable of removing the machined gear from the arbor. , an arbor rotation position detection sensor that detects the rotation position of the arbor of the workpiece supported by the loading unit, and a gear rotation position detection sensor that detects the rotation position of the pre-machining gear attached to the arbor. , the machining unit and the tool unit synchronously rotate the gear mounted on the arbor and the tool based on the rotational position of the gear before machining with respect to the arbor, which is detected by the arbor rotation position sensor and the gear rotation position sensor. To provide a gear machining device which is operated and controlled so as to attach a pre-machined gear to a gripper positioned at a carry-in position and remove a machined gear from the gripper positioned at a carry-out position. .

Preferably , the first to third grippers are configured to open and close independently of each other.

The gear machining apparatus according to the present invention may further include a tailstock unit that cooperates with the machining unit at the machining position to hold the gear rotatably around the axis.
The tail stock unit is positioned radially outward of a turning trajectory of the gear conveyed about the turning center axis by the conveying unit and between a loading position and a processing position with respect to a circumferential position around the turning center axis, or , a support column arranged on the table (bed) of the gear machining apparatus so as to be positioned between the machining position and the unloading position.

The gear machining apparatuses according to the various configurations of the present invention may further include a dressing unit for dressing the tool.
The dressing unit is supported so as to be able to come into contact with and separate from the tool on a fixed table fixed to the upper surface of a base support shaft that supports the revolving member so as to be rotatable around the center axis of revolving.

Alternatively, the gear machining apparatus according to the various configurations of the present invention may further include a plurality of dressing units for dressing the tools.
The plurality of dressing units are supported by a rotary table that is rotatably supported by a base support shaft that supports the rotatable member so as to be rotatable around the center axis of rotation.

The rotary table can be fixed at a plurality of dressing positions in which each of the plurality of dressing units faces the tool. It is supported by the rotary table so as to be able to come into contact with and separate from the tool.

According to the gear machining apparatus of the present invention, the first to third grippers supported by the revolving member that is rotationally driven about the revolving center axis at equal intervals about the revolving center axis detach the workpiece including the gear and the arbor. The grippers can be freely supported, and the revolving member can be positioned at equal intervals around the center axis of the revolving member such that the grippers can be sequentially positioned at the loading position, the processing position, and the unloading position, and the processing unit is located at the processing position. The tool unit is configured to deliver a work piece to and from a gripper attached to the tool unit , support an arbor of the work piece so as to be non-rotatable and detachable about the axis, and rotate the arbor about the axis. The tool is synchronously rotated with a gear mounted on an arbor that is rotationally driven by the machining unit and meshes with the gear to machine the gear . A carry-out unit that detachably supports an arbor and enables connection of a pre-machined gear to the arbor, and is disposed at a carry-out position, detachably supports the arbor and removes the machined gear from the arbor. is possible, and the rotational position of the arbor of the workpiece supported by the loading unit and the rotational position of the pre-machining gear mounted on the arbor are detected by an arbor rotational position detection sensor and a gear rotational position detection sensor, respectively. The machining unit and the tool unit are configured to rotate the gear mounted on the arbor and the The tools are controlled to rotate synchronously so that the pre-machined gear can be attached to the gripper positioned at the load-in position, and the machined gear can be removed from the gripper positioned at the carry-out position. Since it is configured as above, it is possible to facilitate the work of exchanging the machined gear and the unmachined gear.

FIG. 1 is a perspective view of a gear machining apparatus according to Embodiment 1 of the present invention. FIG. 2 is a plan view of the gear machining apparatus with the dressing unit removed. FIG. 3 is a partial perspective view including a conveying unit in the gear machining apparatus. FIG. 4 is a partial perspective view including a transfer unit of a gear machining apparatus according to a modification of the first embodiment. FIG. 5 is a partial perspective view including a dressing unit of a gear machining apparatus according to another modification of the first embodiment. FIG. 6 is a perspective view of a gear machining apparatus according to Embodiment 2 of the present invention. FIG. 7 is a plan view of the gear machining apparatus according to the second embodiment with the dressing unit removed. FIG. 8 is a perspective view of a gear machining apparatus according to Embodiment 3 of the present invention.

Embodiment 1
An embodiment of a gear machining apparatus according to the present invention will be described below with reference to the accompanying drawings.
FIG. 1 shows a perspective view of a gear machining apparatus 1A according to this embodiment.
Further, FIG. 2 shows a plan view of the gear machining apparatus 1A with the dressing unit 200 described below removed.

As shown in FIGS. 1 and 2, the gear machining apparatus 1A has three working positions, a load-in position 11, a machining position 12, and a carry-out position 13, which are equally spaced around the turning center axis X. Mounting of the gear 100a before machining at the carrying-in position 11, machining of the gear 100 at the machining position 12, and removal of the machined gear 100b at the carrying-out position 13 can be performed independently of each other. .

In the present embodiment, in the plan view shown in FIG. 2, the carry-in position is set on the upper side of the paper surface and the carry-out position is set on the lower side of the paper surface with reference to the processing position 12, and the gear 100 is transferred counterclockwise. However, it is also possible to set the carry-in position to the lower side and the carry-out position to the upper side, and move the gear 100 clockwise.

Specifically, the gear processing apparatus 1A includes a transport unit 20 that transports the gear 100 around the turning center axis X, a processing unit 40 that can rotationally drive the gear 100 around the axis at the processing position 12, and the processing unit and a tool unit 50 including a tool 51 composed of a threaded grindstone or the like for processing the gear 100 rotatably driven by 40 .

FIG. 3 shows a perspective view of only a part including the transport unit 20. As shown in FIG.
As shown in FIGS. 1 to 3, the transfer unit 20 includes a turning member 21 rotatable around the turning center axis X, first to third grippers 25a to 25c supported by the turning member 21, A turning driving member (not shown) such as an electric motor for driving the turning member 21 to rotate around the turning center axis X is provided.

The first to third grippers 25a to 25c are arranged at equal intervals around the rotation center axis X, and are configured to support the gear 100 directly or indirectly in a detachable manner.

In this embodiment, each of the grippers 25a to 25c has a pair of arms 26 that can be opened and closed. The gear 100 is released by gripping directly or indirectly and performing an opening operation in which the free ends of the pair of arms 26 are separated from each other.

The opening and closing operations of the pair of arms 26 can be realized by various configurations.
In the present embodiment, actuators 22a to 22c are installed on the upper surface of the turning member 21 to extend and retract by hydraulic pressure, pneumatic pressure or electric power. The proximal end is connected, and the arm 26 opens and closes according to extension and retraction of the operating rod 220a.

Instead of this, it is also possible to open and close the pair of arms 26 by the following configuration.
That is, the gripper 25 is provided with a gripping spring (not shown) that biases the free ends of the pair of arms 26 in a direction toward each other, and the pair of arms 26 is opened against the biasing force of the gripping spring. A cam mechanism (not shown) may be provided, and the pair of arms 26 may be vertically movable along the center axis X of rotation.

When the pair of arms 26 are positioned at the lowered position, the cam mechanism causes the pair of arms 26 to open against the urging force of the gripping spring, and when the pair of arms 26 is positioned at the raised position. Then, the closing operation of the pair of arms 26 by the urging force of the gripping spring is permitted.

The opening and closing operations of the pair of arms 26 are performed according to the elevation of the turning member 21 .
That is, as shown in FIG. 3, the turning member 21 is supported by the base support shaft 15 so as to be rotatable around the turning center axis X and vertically movable. In addition to being rotated around X, it can take a raised position and a lowered position by means of a turning elevation driving member (not shown) provided in the transfer unit 20 .

The pair of arms 26 of the first to third grippers 25a to 25c are integrally opened and closed according to the vertical movement of the turning member 21. As shown in FIG.

That is, when changing the position of the gear 100 around the turning center axis X, the turning member 21 is positioned at the raised position. At this time, the operating rods 220a of the actuators 22a-22c are shortened and the paired arms 26 of the first to third grippers 25a-25c are all closed. Then, when the gear is positioned at the target position around the turning center axis X, the turning member 21 is positioned at the lowered position. At this time, the operating rods of the actuators 22a-22c are extended to open the pair of arms 26 of the first to third grippers 25a-25c.

Instead of this, it is also possible to provide a transfer unit 20B in which each of the first to third grippers 25a to 25c can be individually moved vertically with respect to the turning member 21. FIG.

FIG. 4 shows a partial perspective view of a gear machining apparatus 1B according to a modification including the transport unit 20B.

As shown in FIG. 4, the transfer unit 20B includes first to third movable bodies 27a to 27c supported by the turning member 21 so as to be independently movable in the vertical direction along the center axis X of turning, and It has first to third lifting drive members 28a to 28c for vertically moving the first to third movable bodies 27a to 27c, respectively. to the third movable bodies 27a to 27c.

The first to third elevation driving members 28a to 28c are composed of hydraulic/pneumatic or electric actuators.
The first to third elevation drive members 28a to 28c are composed of first to third drive bodies fixed to the turning member 21 and first to third drive bodies extending upward from the first to third drive bodies. It has vertical operation rods 280a to 280c which are connected to the movable bodies 27a to 27c and which are vertically extended and contracted by the drive body. For example, the first to third drive bodies are fixed to the lower surface of the pivot member 21, and in this case, the first to third vertical operation rods 280a to 280c extend upward through the pivot member 21. be done.
Reference numerals 29a to 29c in FIG. 4 denote slide rails erected on the upper surface of the turning member 21 to guide and support the first to third movable bodies 27a to 27c so as to be vertically movable.

In the conveying unit 20B, for example, when the first to third grippers 25a to 25c are lowered, the gear 100 (in this embodiment, the gear 100 and If the clamping of the workpiece W) including the arbor 110 was insufficient due to the presence of foreign matter, only the gripper in the working position, together with the workpiece W it supports, is raised to seat (e.g. by releasing coolant oil). The operation of cleaning the location and then lowering the gripper again is repeated until the workpiece W is properly clamped to the working spindle. During this time, the grippers positioned at the other working positions, that is, the loading position and the unloading position, can stand by in the lowered position, enabling efficient work at each working position.

The turning member 21 rotates around the turning center axis X to one side, thereby moving the first to third grippers 25a to 25c to the carrying-in position 11 and the processing position 12, which are equally spaced around the turning center axis X. and an unloading position 13 in that order.

That is, the turning member 21 is moved to a first turning position (FIGS. 1 and 3) for positioning the first to third grippers 25a to 25c at the loading position 11, the processing position 12 and the unloading position 13, respectively, around the turning center axis X. 2), and the first to third grippers 25a to 25c are positioned at the processing position, unloading position, and loading position, respectively, by rotating 1/3 from the first turning position to one side around the turning center axis X. and a 1/3 rotation from the second rotation position to one side around the rotation center axis X to position the first to third grippers 25a to 25c at the unloading position, the loading position and the processing position, respectively. and a third pivot position to allow the

As shown in FIG. 2 and the like, in the present embodiment, the swivel member 21 has a ring shape having a central hole through which the base support shaft 15 is inserted. 25c are supported by the ring-shaped turning member 21 at equal intervals around the turning center axis X in a state where the free ends of the pair of arms 26 are positioned radially outward.

The processing unit 40 can transfer the gear 100 to and from the gripper 25 positioned at the processing position 12, and can rotate the gear 100 received from the gripper 25 around the axis at a predetermined rotational speed. is configured to

Although not shown in detail, the machining unit 40 includes a machining spindle that is directly or indirectly connected to the gear 100 so as not to rotate relative to the axis, and a gear machining driving member that drives the machining spindle to rotate around the axis. , a gear-side rotation sensor that directly or indirectly detects the rotational position of the gear 100, a clamp mechanism that can hold and release the direct or indirect connection of the gear 100 to the machining spindle, and the gear 100 to the machining spindle. and a seating sensor for confirming the close contact state when directly or indirectly connected.

In the gear machining apparatus 1A according to the present embodiment, as described above, the transfer unit 20 moves the workpiece W including the gear 100 and the arbor 110 to which the gear 100 is detachably connected around the turning center axis X. configured to be transported to

Accordingly, the processing unit 40 transfers the workpiece W including the gear 100 and the arbor 110 to and from the gripper 25 positioned at the processing position 12 , and the arbor 110 of the workpiece W received from the gripper 25 . and the machining spindle are configured to be detachably connected to each other so as to be non-rotatable relative to each other around the axis.

Specifically, when the one gripper 25 supporting the workpiece W formed by connecting the arbor 110 and the pre-machining gear 100a is positioned at the machining position, the one gripper 25 is moved together with the other gripper 25 or the one gripper Only 25 is positioned in the lowered position and the workpiece W is clamped on said working spindle. After the workpiece W is clamped to the machining spindle, the pair of arms 26 of the one gripper 25 are opened to separate the workpiece W from the one gripper 25 . In this state, the gear 100a before machining is machined by the tool unit 50. As shown in FIG. After completion of machining, the pair of arms 26 of the one gripper 25 are closed to grip the machined gear 100b, and in this state, the one gripper 25 together with the other grippers 25 or only the one gripper 25 is positioned at the raised position, and is transferred from the processing position 12 to the unloading position 13 in accordance with the turning of the turning member 21 about the center axis X of turning.

The tool unit 50 is aligned with both the rotational axis of the gear 100 supported by the processing unit 40 and the virtual axis L (see FIG. 2) connecting the rotational axis of the gear 100 and the turning center axis X of the transport unit 20. The tool 51 rotatably supported around the orthogonal tool rotation axis Y, a tool driving member (not shown) that drives the tool 51 to rotate around the tool rotation axis Y, and a tool that detects the rotational position of the tool 51. A side rotation sensor (not shown) is provided, and the tool 51 is rotated by the processing unit 40 after aligning the teeth so that the teeth do not collide according to the detection result of the gear side rotation sensor. It is configured so that machining can be performed by rotating it synchronously with the driven gear 100 .

The tool unit 50 further includes a tool moving mechanism (not shown) that moves the tool 51 in the vertical direction, the tool rotation axis direction, and the imaginary axis direction.

According to the gear machining apparatus 1A having such a configuration, the work of mounting the pre-machined gear 100a to the gripper 25 positioned at the carry-in position 11 and the work of mounting the machined gear 100a from the gripper 25 positioned at the carry-out position 13 The take-out work of 100b can be performed individually, and the work load on the worker can be effectively reduced.

That is, in a conventional gear machining apparatus configured to carry out the operation of removing the machined gear and the operation of mounting the gear before machining at one place, the operator removes the machined gear from the corresponding gripper with one hand. While gripping the gear with the other hand, it is necessary to attach the unprocessed gear that has been gripped in advance to the gripper.
In particular, when the gear to be machined is a large-sized gear such as a large-diameter gear or a gear with a shaft, the workload of the operator is increased.

On the other hand, in the gear machining apparatus 1A according to the present embodiment, the operator attaches the pre-machining gear 100a to the gripper positioned at the carry-in position 11 among the first to third grippers 25a to 25c. The operation can be performed at one location and the unloading operation of the machined gear 100b from the gripper located at the unloading position 12 can be performed at another location.
Therefore, the machined gear 100a and the unmachined gear 100b can be exchanged with both hands, and workability can be improved.

As described above, in the gear machining apparatus 1A according to the present embodiment, the transfer unit 20 is configured to transfer the workpiece W in which the gear 100 and the arbor 110 are connected.

In this case, the gear machining apparatus 1A is further provided with a carry-in unit 60 arranged at the carry-in position 11 and a carry-out unit 70 arranged at the carry-out position 13 .

The carry-out unit 70 includes a carry-out side arbor support mechanism 71 that detachably supports an arbor 110, and a carry-out side gear attachment/detachment mechanism (see FIG. abbreviated).

Specifically, when the one gripper 25 supporting the workpiece W formed by connecting the arbor 110 and the machined gear 100b is transferred to the carrying-out position 13 by the rotation of the rotating member 21, the one gripper 25 is lowered. The arbor 110 of the workpiece W is connected to the unloading side arbor support mechanism 71, and then the pair of arms 26 of the one gripper 25 is opened. As a result, the one gripper 25 and the workpiece W (connected body of the arbor 110 and the machined gear 100b) are separated.

Since the machined gear 100b connected to the arbor 110 is disconnected from the arbor 110 by the carry-out side gear attachment/detachment mechanism, the operator can quickly transfer the machined gear 100b to a conveyor or the like. can.

After the machined gear 100b is separated from the arbor 110, the one gripper 25 is raised to the raised position while the pair of arms 26 are closed and the empty arbor 110 is gripped. The one gripper 25 grips the empty arbor 110 and is transferred from the carry-out position 13 to the carry-in position 11 in accordance with the turning of the turning member 21 about the center axis X of turning.

The carrying-in unit 60 includes a carrying-in side arbor support mechanism 61 that detachably supports an arbor 110, and a carrying-in side gear attachment/detachment mechanism (see FIG. abbreviated).

When the one gripper 25 that grips the empty arbor 100 is transferred from the carry-out position 13 to the carry-in position 11, the one gripper 25 is lowered from the raised position to the lowered position, and the empty arbor 110 is moved to the carry-in side arbor. It is connected to the support mechanism 61 . In this state, the pair of arms 26 of the one gripper 25 are opened.

The operator inserts the unprocessed gear 100a to be processed next between the pair of arms 26 that are in the open state, and inserts the gear 100a into the empty arbor supported by the carry-in side arbor support mechanism 61. Plug into 110. The pre-machining gear 100a inserted into the arbor 110 is connected to the arbor 110 by the loading-side gear attachment/detachment mechanism.

After that, the pair of arms 26 are closed to grip the workpiece W in which the pre-machining gear 100a and the arbor 110 are connected. The one gripper 25 is raised from the lowered position to the raised position.

Then, the one gripper 25 grips the workpiece W in which the pre-machining gear 100a and the arbor 110 are connected, and in response to the rotation of the rotation member 21 around the rotation center axis X, the gripper 25 moves from the carry-in position 11. It is transferred to the processing position 12 .

As shown in FIGS. 1 and 2, the gear machining apparatus 1A according to the present embodiment further includes a tailstock unit 80 that cooperates with the machining unit 40 to sandwich the gear 100 at the machining position 12. have.

The tailstock unit 80 is configured to support the gear 100 supported by the processing unit 40 from above.

As shown in FIG. 2, the tailstock unit 80 is positioned radially outward of the turning locus R of the gear 100 conveyed around the turning center axis X by the conveying unit 20 and around the turning center axis X. It is cantilevered on a support column 90 erected on a table (bed) 95 so as to be positioned between the loading position 11 and the processing position 12 with respect to the directional position.

According to such a configuration, even if the gear 100, which is an object to be processed, has a large diameter, it is possible to prevent the support column 90 from coming into contact with the gear 100 conveyed by the conveying unit 20. .

2, the support column 90 is positioned radially outward from the turning locus R of the gear 100 and at a processing position 12 and a carrying-out position with respect to the circumferential position around the turning center axis X. It is also possible to place it on the table (bed) 95 so as to be positioned between 13 .

As shown in FIG. 1, the gear machining apparatus 1A according to this embodiment further includes a dressing unit 200 for dressing the tool 51. As shown in FIG.
In the present embodiment, the dressing unit 200 has a fixed table 510 fixed to the upper surface of the base support shaft 15, and a sliding table 510 that enables dressing teeth (not shown) to come into contact with and separate from the tool 51. supported by a mechanism.

Although the gear machining apparatus 1A according to this embodiment includes the single dressing unit 200, it may include a plurality of dressing units 205a and 205b instead.
FIG. 5 shows a partial perspective view of a gear machining apparatus 1C according to a modification including a plurality of dressing units 205a and 205b.

As shown in FIG. 5, in the modification 1C, the plurality of dressing units 205a and 205b are supported by a rotary table 215 that is rotatably supported by the base support shaft 15. As shown in FIG.

The rotary table 215 can be fixed at a plurality of dressing positions where each of the plurality of dressing units 205 a and 205 b faces the tool 51 .

The plurality of dressing units 205a and 205b are arranged through a slide mechanism that enables dressing teeth (not shown) to come into contact with and separate from the tool 51 in a state where the rotary table 215 is fixed at the corresponding dressing position. It is supported by the rotary table 215 .

In such a modified example, it is possible to perform appropriate dressing processing for a plurality of types of tools 51 without replacing the dressing units 205a and 205b.
Regardless of whether there is a single dressing unit or a plurality of dressing units, during the dressing operation, the dressing teeth (not shown) are brought close to the tool 51, and at the same time the tool 51 is moved toward the dressing unit. move to As a result, the slide length required for the slide mechanism can be shortened.

As described above, instead of performing tooth indexing after the unmachined gear 100a reaches the machining position 12 and engaging with the tool 51, one gear 100 is being machined while another gear 100a is at the carry-in position. By detecting the rotation angle of the teeth of the unmachined gear 100a, it is possible to shorten the time before starting machining at the machining position (machining preparation time).

That is, the loading unit 60 further includes an arbor rotation position sensor (not shown) that detects the rotational position of the arbor 110 supported by the loading-side arbor support mechanism 61 and an arbor supported by the loading-side arbor support mechanism 61. A gear rotation position sensor (not shown) that detects the rotational position of the gear 100a before machining attached to the arbor 110 mounted on the arbor 110 is provided. The angle indicating how much the reference position around the axis of the gear 100 is rotated with respect to the reference position around the axis of the arbor 110 in the state of the workpiece W fixed to the good.

When the arbor 110 is moved to the machining position 12 and set on the machining spindle of the machining unit 40, the machining spindle is corrected to an appropriate relative rotational position with respect to the tool unit 50 based on the detection signal. . This eliminates the possibility of the teeth colliding with each other when they are synchronously driven and meshed.

Embodiment 2
Another embodiment of a gear machining apparatus according to the present invention will be described below with reference to the accompanying drawings.
FIG. 6 shows a perspective view of the gear machining apparatus 2 according to this embodiment.
7 shows a plan view of the gear machining apparatus 2 with the dressing unit 200 removed.
In the drawings, the same reference numerals are given to the same members as in the first embodiment, and the description thereof will be omitted as appropriate.

As shown in FIGS. 6 and 7, the gear machining apparatus 2 according to this embodiment further includes a moving unit 250 compared to the gear machining apparatus 1A according to the first embodiment.

The moving unit 250 is configured to attach/detach the pre-machining gear 100 a to/from the arbor 110 of the workpiece W supported by the loading unit 60 without changing the rotational position.

In this embodiment, the moving unit 250 is supported by the support column 90. As shown in FIG.
That is, as shown in FIG. 7, the support column 90 is located radially outward from the transport locus R of the gear 100 transported by the transport unit 20, and is located at the carry-in position 11 and the machining position with respect to the rotation center axis X. Located between 12.

The moving unit 250 includes a vertically extending rail 252 supported by the support column 90 so as to be positioned above the workpiece W supported by the loading unit 60 , and a vertically moving rail 252 which extends vertically. A moving body 254 supported movably, a pair of gripping arms 256 supported by the moving body 254 and detachably gripping the gear 100 of the workpiece W supported by the loading unit 60, and the moving body 254 and a gripping arm driving member (not shown) for opening and closing the pair of gripping arms 256 .

In this embodiment, the carrying-in side arbor support mechanism 61 of the carrying-in unit 60 includes a carrying-in spindle (not shown) detachably connected to the arbor 110 and A gear rotation position sensor is provided.

The gear machining device 2 according to this embodiment operates as follows.
A pre-machining gear 100a attached to one gripper 25 positioned at the carrying-in position 11 by an operator is attached to an arbor 110 supported by the carrying-in spindle from the one gripper 25, and axially aligned relative to the arbor 110. Non-rotatably connected.

In this state, the gear rotational position sensor detects the phase (rotational position) of the gear 100 a before machining, and this phase information is transmitted to the control device of the gear machining apparatus 2 .

Next, the moving body 254 of the moving unit 250 is lowered, and the pair of gripping arms 256 moves the pre-machining gear 110a of the workpiece W supported by the loading spindle while avoiding interference with the gripper 25. With the pair of gripping arms 256 gripping the pre-machining gear 100a, the arbor 110 is disconnected from the pre-machining gear 100a, and the moving body 254 is lifted to remove the pre-machining gear 100a. The unprocessed gear 100a is removed from the arbor 110 without changing the phase (rotational position) of .

Next, when the gear 100a before machining is removed from the arbor 110 by the moving unit 250, only the arbor 110 is adjusted so that the arbor 110 has a predetermined phase difference with respect to the gear 100a before machining. is rotated by the loading spindle (not shown).

Then, the moving body 254 is lowered to transfer the unprocessed gear 100a gripped by the pair of gripping arms 256 to the arbor 110 again, thereby connecting the unprocessed gear 100a to the arbor 110 so as not to rotate relative to each other. .

In the workpiece W thus formed, the pre-machining gear 100a and the arbor 110 have the predetermined phase difference.

After that, the workpiece W is transported from the loading position 11 to the processing position 12 by the transport unit 20 and transferred from the transport unit 20 to the processing unit 40 at the processing position 12 .

In the tool unit 50 and the processing unit 40, the tool 51 and the arbor 110 are synchronized in a state where the rotational position of the tool 51 is aligned with the pre-processing gear 100a based on the predetermined phase difference. The gear 100a before machining is machined by the tool 51 while being rotated.

According to the gear machining apparatus 2 having such a configuration, in addition to the same effect as in the first embodiment, that is, the effect of improving the workability of exchanging the machined gear 100b and the unmachined gear 100a, It is possible to shorten the time required for synchronously meshing the tool 51 and the pre-machining gear 100a and to simplify the operation control.

That is, in the present embodiment, when conveyed to the machining position 12, the pre-machining gear 100a and the arbor 110 always have the predetermined phase difference.
Therefore, the pre-machining gear 100a and the tool 51 can be synchronously meshed based on the predetermined phase difference without transmitting the rotational position information detected at the carry-in position 11 to the processing position. Simplification can be achieved.

Embodiment 3
Another embodiment of a gear machining apparatus according to the present invention will be described below with reference to the accompanying drawings.
FIG. 8 shows a perspective view of the gear machining device 3 according to this embodiment.
In the drawings, the same members as those in Embodiments 1 and 2 are denoted by the same reference numerals, and description thereof will be omitted as appropriate.

The gear machining apparatus 3 according to the present embodiment differs from the gear machining apparatuses 1A and 2 according to the first and second embodiments in that the object to be conveyed by the conveying unit 20 is only the gear 100. are different.

That is, in the gear processing apparatus 3 according to the present embodiment, the unprocessed gear 100a held by one gripper 25 at the carry-in position 11 is transported as a single gear to the processing position 12, and at the processing position 12, the one The unmachined gear 100a is delivered from the gripper 25 to the machining unit 340, and the machined gear 100b that has been machined under the cooperation of the machining unit 340 and the tool unit 50 is received from the machining unit 340 to the one gripper 25. The machined gear 100 b that has been handed over and held by the one gripper 25 is transported as a single gear to the unloading position 13 and unloaded from the one gripper 25 at the unloading position 13 . The gripper 25, now empty, returns to the loading position 11 again.

Specifically, the gear machining apparatus 3 according to the present embodiment has a machining unit 340 instead of the machining unit 40, and further has the machining unit 340, as compared with the gear machining apparatus 1A according to the first embodiment. The carry-in unit 60 and the carry-out unit 70 are deleted.

The machining unit 340 includes, in addition to the machining spindle and the gear machining driving member, a machining arbor 345 connected to the machining spindle so as not to rotate relative to the axis, and a machining side that attaches and detaches the gear 100 to and from the machining arbor 345. A gear attachment/detachment mechanism (not shown) is provided.

The machining arbor 345 is arranged to transfer the gear 100 to and from the gripper 25 positioned at the machining position 12 .

In the gear machining apparatus 3 according to the present embodiment, the gear rotation sensor (not shown) for detecting the phase (rotational position) of the gear 100a before machining is mounted on the machining arbor 345. is arranged to detect the phase of

The gear machining device 3 according to this embodiment operates as follows.
An operator mounts the pre-machining gear 100 a on one gripper 25 at the carry-in position 11 .
The turning member 21 is rotationally driven about the turning center axis X so that the gear 100a before machining that is gripped by the one gripper 25 is transported from the carrying-in position 11 to the machining position 12 .

At the machining position 12 , the pre-machining gear 100 a is transferred from one gripper 25 to the machining arbor 345 .

After performing phase matching with the tool 51 based on the phase (rotational position) of the gear 100a before machining detected by the gear rotation position sensor (not shown), the gear 100a before machining and the tool 51 are meshed, and the The operation of the machining unit 340 and the tool unit 50 is controlled so that the machining arbor 345 and the tool 51 rotate synchronously to machine the gear.

The machined gear 100b is transferred from the machining arbor 345 to the corresponding gripper 25, and the turning member 21 is rotated so that the machined gear 100b gripped by the gripper 25 is conveyed from the machining position 12 to the unloading position 13. The machined gear 100 b is carried out from the gripper 25 at the carry-out position 13 by being rotationally driven around the turning center axis X.

Also in the gear machining apparatus 3 having such a configuration, it is possible to improve the workability of exchanging the machined gear 100b and the unmachined gear 100a, as in the above embodiments 1A and 2.

1A to 1C, 2, 3 Gear processing device 11 Carry-in position 12 Machining position 13 Carry-out position 20 Transfer unit 21 Turning members 25a-25c First to third grippers 40, 340 Machining unit 50 Tool unit 51 Tool 60 Carry-in unit 70 Carry-out unit 80 Tail stock unit 90 Support column 100a Gear before machining 100b Gears after machining 110, 345 Arbors 200, 205a, 205b Dressing unit 210 Fixed table 215 Rotary table 250 Moving unit W Workpiece X Turning center axis R Turning trajectory

Claims (5)

a turning member driven to rotate about a turning center axis; and first to third grippers supported by the turning member at equal intervals around the turning center axis, wherein each gripper has a gear as an object to be machined and the gear as an axis. A workpiece including an arbor that is non-rotatably and detachably supported can be detachably supported directly or indirectly, and the rotating member is placed at equal intervals around the center axis of rotation at a loading position, a processing position, and a carrying-out position. a transport unit configured to sequentially position each gripper in the
The workpiece is delivered to and from the gripper positioned at the processing position among the first to third grippers, and the arbor of the workpiece is supported so as to be detachable and non-rotatable relative to the axis, and a processing unit capable of rotationally driving the arbor about its axis;
a tool unit including a tool that is synchronously rotated with a gear attached to the arbor that is rotationally driven by the machining unit and meshes with the gear to machine the gear ;
a loading unit disposed at a loading position, detachably supporting the arbor, and capable of connecting a pre-machining gear to the arbor;
a carry-out unit disposed at a carry-out position, detachably supporting the arbor, and capable of removing the machined gear from the arbor;
An arbor rotation position detection sensor that detects the rotation position of the arbor of the workpiece supported by the loading unit and a gear rotation position detection sensor that detects the rotation position of the pre-machining gear attached to the arbor ,
In the machining unit and the tool unit, the gear mounted on the arbor and the tool rotate synchronously based on the rotational position of the gear before machining with respect to the arbor detected by the arbor rotation position sensor and the gear rotation position sensor. The operation is controlled as
1. A gear machining apparatus capable of attaching a pre-machined gear to a gripper positioned at a carry-in position and removing a machined gear from a gripper positioned at a carry-out position. 2. The gear machining apparatus according to claim 1, wherein said first to third grippers open and close independently of each other. a tailstock unit cooperating with the processing unit at the processing position to hold the gear rotatably about the axis;
The tail stock unit is positioned radially outward of a turning trajectory of the gear conveyed about the turning center axis by the conveying unit and between a loading position and a processing position with respect to a circumferential position around the turning center axis, or 3. The gear machining apparatus according to claim 1, wherein the gear machining apparatus is supported by a support column arranged between the machining position and the unloading position. A dressing unit for dressing the tool,
4. The dressing unit is supported so as to be able to come into contact with and separate from the tool on a fixed table fixed to an upper surface of a base support shaft that supports the turning member so as to be rotatable around a turning center axis. 4. The gear machining device according to any one of 1 to 3 . comprising a plurality of dressing units for dressing the tool;
The plurality of dressing units are supported by a rotary table rotatably supported by a base support shaft that supports the rotatable member so as to be rotatable around a center axis of rotation,
The rotary table can be fixed at a plurality of dressing positions in which each of the plurality of dressing units faces the tool,
The plurality of dressing units are supported by the rotary table so as to be able to come into contact with and separate from the tool when the rotary table is fixed at the corresponding dressing position. 5. The gear machining apparatus according to any one of 4 .

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