JP2001079718A - Compound machining machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently perform gear cutting machining work in addition to machining work such as lathe turning, drilling, milling, etc. SOLUTION: A tool holder 6 comprises a hob shaft 12 of a hob 11 for gear cutting connected to a rear part of a rotaion shaft 9 of a clamp part 7 to be locked to a tool box main shaft 4 of a tool box 3 movable along X-, Y-, Z-, and B-axes through a reduction mechanism 10, and a tip part of the hob shaft 12 is supported by a filled part in an end surface of the tool box 3. On a casing 19 to cover the reduction mechanism 10, rear end parts of the rotation shaft 9 and the hob shaft 12 are respectively rotatably supported, a support member 21 is integrally connected to an end part of the casing 19, and its tip part is supported by a filled part 23 in the end surface of the tool box 3. The tool holder 6 is automatically attached to/detached from the tool box main shaft 4 by an automatic attaching/detaching device.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-tasking machine capable of performing a hobbing operation in addition to machining operations such as turning, drilling, and milling.

[0002]

2. Description of the Related Art Conventionally, when performing turning, drilling, milling and the like on one work, a multi-tasking machine (composite NC lathe) having these machining functions has been used. In addition, when the workpiece is subjected to gear cutting such as spline in addition to turning, drilling, and milling, since the multi-tasking machine is not provided with a hobbing function, the machining such as the turning is completed. Later, the work is set back on the hobbing machine and the gear cutting is performed.

However, if the work is set back on the hobbing machine and subjected to gear cutting in this way, the number of machining steps is increased and the productivity is low. For example, Japanese Patent Publication No. Hei 7-53323 or Japanese Unexamined Patent Publication No. Hei 4-269137. In Japanese Patent Laid-Open Publication No. H10-209, a multi-tasking machine provided with a hobbing mechanism is proposed.

[0004] In the multi-tasking machine described in Japanese Patent Publication No. 7-53323, a tool rest turret is provided on a tool rest (working part) that can be controlled to move in the X-axis and Z-axis directions around a turning center axis in the Z-axis direction. The gear processing unit (tool holder) is detachably mounted on the rotary tool mounting station (tool shaft) of the turret. In this gear processing unit, a rotating shaft having a predetermined angle with respect to the Z axis (main shaft) is rotatably supported, and a hob arbor provided with a hob is mounted on the upper end of the rotating shaft. Also, in this multi-tasking machine, gear generation is performed by synchronizing the rotation of the workpiece (rotation of the spindle) with the rotation of the rotary tool, and the rotation of the spindle with respect to the feed of the hob in the spindle axis direction. Is increased / decreased at a fixed ratio, and the gear is machined.

[0005] The multi-tasking machine described in Japanese Patent Application Laid-Open No. 4-269137 is capable of controlling movement in the X-axis and Y-axis directions, has an axis in the Y-axis direction, and is rotatable about that axis. B which is held movably in the axial direction
A tool spindle head (working portion) is provided at a tip of the shaft, and the tool spindle head rotatably holds a tool spindle (tool shaft) having an axis line orthogonal to the B axis. The hob tool is attached to the tip of. In this multi-task machine, the hob tool is fed in the Y-axis direction by synchronizing the rotation of the workpiece (rotation of the work spindle) and the rotation of the hob (rotation of the tool spindle), and cuts into the work to cut the gear. Is being done. It also describes that the gear is processed by controlling the B axis.

[0006]

However, the above-mentioned Japanese Patent Publication No. 7-53323 and Japanese Patent Laid-Open No. Hei 4-26913.
In the multi-task machine described in Japanese Patent Publication No. 7, since the hob is supported at the upper end of the rotary tool shaft or the tip of the tool spindle in a cantilever manner, the rigidity of the tool is low and the vibration control ability is low. There is a problem that machining efficiency, machining accuracy and tool life are inferior.

Further, in the multi-tasking machine described in Japanese Patent Publication No. 7-53323, since the hob exchange and the change of the inclination angle of the hob are performed manually, there is a problem that the setup takes a lot of time. Further, since there is no movement control function in the Y-axis direction, the position of the hob with respect to the workpiece to be cut cannot be moved to perform processing, and there is a problem that the wear of the cutting edge is concentrated and the life of the hob is extremely short. Note that Japanese Patent Application Laid-Open No. 4-26
Although the multifunction peripheral described in Japanese Patent No. 9137 has a movement control function in the Y-axis direction, it does not mention moving the cutting edge position of the hob.

The applicant of the present invention has proposed a hob unit which can be attached to a multi-tasking machine and is configured to support both ends of the hob in Japanese Patent Application No. 10-297819. By using the hob unit, it is possible to suppress the reduction of the tool rigidity, the reduction of the vibration control ability, and the concentration of the wear of the cutting blade as described above, but the hob replacement and the change of the inclination angle of the hob are manual. Therefore, there is a problem that it takes a lot of time for the setup.

The present invention has been made to solve such a problem, and in addition to machining operations such as turning, drilling, milling, and the like, a gear cutting operation can be performed, and a gear cutting operation is performed. It is an object of the present invention to provide a multi-tasking machine capable of improving machining efficiency, machining accuracy, and tool life while reducing setup time.

[0010]

In order to achieve the above-described object, a multi-tasking machine according to a first aspect of the present invention includes a headstock that supports a workpiece to be machined around a spindle, and a spindle head parallel to the spindle. Z axis, Y axis orthogonal to the Z axis, YZ
A machining unit movable in each of the X-axis perpendicular to the plane and the B-axis in the circumferential direction of the axis in the Y-axis direction, and a tool holder having a machining tool in the machining unit is detachable and detachable. In a multi-tasking machine having a tool shaft capable of transmitting a rotational driving force to a machining tool, the tool holder includes a clamp portion detachable from the tool shaft, a hob shaft fixed to the clamp portion, and a hob shaft. A gear cutting hob to be mounted, a machining reaction force receiving member that rotatably holds a rear end portion of the hob shaft and has one end extending toward a tool shaft of the machining portion near the tool axis; A fitting portion for supporting one end of the machining reaction force receiving member is provided near the tool axis of the machining portion.

In the present invention, one end of the machining reaction force receiving member is supported by the fitting portion when the clamp portion of the tool holder is mounted on the tool shaft. When the tool holder is mounted on the tool shaft, the processing portion moves by a predetermined amount in the X, Y, and Z axis directions, and the hob and the gear cutting surface of the workpiece are arranged so as to face each other. By moving a predetermined amount in the axial direction, the advance angle of the hob is set. Next, when the rotational driving force is transmitted from the tool shaft, the rotational driving force is transmitted to the hob shaft via the clamp portion, and the hob rotates to perform the gear cutting on the workpiece. Both ends of the hob shaft are supported by the processing portion via a clamp portion or a processing reaction force receiving member, and a processing reaction force is received by the processing reaction force receiving member during gear cutting by the hob.

According to the present invention, since the hob shaft is supported at both ends and the processing reaction force is received by the processing reaction force receiving member, the tool rigidity and the vibration control ability can be improved. Accordingly, there is an effect that the machining efficiency and machining accuracy of the workpiece to be machined can be improved and the tool life can be extended.

Further, according to the present invention, the exchange of the tool holder and the adjustment of the advancing angle of the hob can be easily performed, so that the setup time and labor required for the replacement can be reduced. In addition, even when the hob itself is replaced due to wear or other damage, the operation can be performed with the tool holder detached from the processing portion, so that there is no effect on the processing operation of the multi-tasking machine. is there. Further, by moving the processing portion in the Y-axis direction, the concentration of abrasion of the hob can be suppressed, and the tool life can be extended.

Next, a multi-tasking machine according to a second aspect of the present invention provides a headstock for supporting a workpiece to be machined around a main axis, a Z-axis parallel to the main axis, a Y-axis orthogonal to the Z-axis, and a YZ plane thereof. A processing part movable in each of the X-axis and the B-axis in the circumferential direction of the Y-axis in a direction perpendicular to the axis, and a tool holder provided with a processing tool in the processing part is detachable and the processing is performed. In a multi-tasking machine having a tool shaft capable of transmitting a rotational driving force to a tool, the tool holder has a clamp portion detachable from the tool shaft, and a rotating shaft fixed to the clamp portion,
A hob shaft connected to the rotating shaft via a speed reduction mechanism, a hobbing hob mounted on the hob shaft, and a rear end of the hob shaft rotatably held, and one end of the hob shaft is A machining reaction force receiving member extending toward the vicinity of a tool shaft, a hob shaft support portion rotatably supporting a tip end of the hob shaft near the tool axis of the machining portion, and the machining reaction force And a fitting portion for supporting one end of the receiving member.

In the present invention, when the clamp portion of the tool holder is mounted on the tool shaft, the end of the hob shaft is supported by the hob shaft support portion, and one end of the processing reaction force receiving member is fitted into the fitting portion. Supported by When the tool holder is mounted on the tool shaft, the processing portion moves by a predetermined amount in the X, Y, and Z axis directions, and the hob and the gear cutting surface of the workpiece are arranged so as to face each other. By moving a predetermined amount in the B-axis direction, the advance angle of the hob is set. Next, a rotational driving force is transmitted from the tool shaft to the rotating shaft via the clamp portion, and the rotational driving force is transmitted to the hob shaft via the reduction mechanism, and the hob rotates to cut the workpiece. Processing is performed. Both ends of the hob shaft are supported by a processing portion, and a processing reaction force of the hob is received by a processing reaction force receiving member.

According to the present invention, by reducing the rotational speed of the rotational driving force of the tool shaft to the optimal rotational speed for the rotation of the hob by the speed reduction mechanism, the torque can be increased and heavy cutting can be performed. Play. In addition, the same effects as those of the first invention are provided.

In the first and second aspects of the present invention, it is preferable that the processing reaction force receiving member is supported by a fitting portion via a buffer member and is displaceable in a hob axial direction. Thus, the processing reaction force received by the processing reaction force receiving member is released in the hob axial direction, thereby suppressing the bending of the processing reaction force receiving member,
Tool rigidity is increased. Therefore, there is an effect that the processing efficiency and the processing accuracy of the workpiece can be improved.

In the first and second aspects of the present invention, it is preferable that a portion of the processing reaction force receiving member located on the side of the hob has a substantially arc-shaped cross-sectional shape. By forming the processing reaction force receiving member in such a shape that it is not easily bent against the processing reaction force, tool rigidity is further increased, and the above-described effect is achieved.

In the first and second aspects of the present invention, it is preferable that a portion of the machining reaction force receiving member located on the side of the hob is arranged at a position facing the work to be cut via the hob. By arranging in this manner, the processing reaction force can be reliably received by the processing reaction force receiving member, the tool rigidity is increased, and the vibration is suppressed.

In the second invention, it is preferable that the speed reduction mechanism is a parallel axis speed reduction mechanism. This makes it possible to convert the rotational driving force transmitted from the tool shaft with an extremely simple configuration into the optimum rotation speed and torque for the hobbing by the hob and use the same, thereby achieving stable gear cutting and heavy cutting. This has the effect that it becomes possible.

In the first and second aspects of the present invention, it is preferable to provide an automatic attachment / detachment means for automatically attaching / detaching the tool holder to / from the tool shaft. Thus, by the automatic attaching / detaching means,
When the tool holder is automatically mounted on the tool axis, the relative position adjustment between the hobbing surface and the hobbing surface of the work to be machined and the setting of the advancing angle of the hob can all be automatically adjusted, greatly reducing the time required for setup. It has the effect of being able to.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a specific embodiment of a multi-tasking machine according to the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view of a main part of a multifunction machine according to a first embodiment of the present invention.

The multi-tasking machine 1 according to the first embodiment includes a headstock 2 for rotatably supporting a workpiece W around a spindle (C axis), and a tool rest 3 for processing the workpiece W. The tool rest 3 has a Z-axis parallel to the C-axis, a Y-axis orthogonal to the Z-axis, an X-axis orthogonal to the YZ plane, and a B-axis in the circumferential direction of the axis in the Y-axis direction. It is possible to move in each direction. The tool rest 3 is provided with a tool rest spindle (corresponding to a tool axis in the present invention) 4 to which a tool holder 6 having a fixed tool such as a cutting tool and a rotary tool such as a drill and a milling cutter can be attached and detached. Also, a tool magazine (not shown) for accommodating the tool holder 6 and an AT
An automatic attachment / detachment device (not shown) having a C (Auto Tool Change) arm 31 is provided, and the tool holder 6 in the tool magazine can be automatically mounted on the tool post spindle 4 by this automatic attachment / detachment device. At the same time, the tool holder 6 mounted on the tool rest spindle 4 can be automatically detached and stored in the tool magazine.

The tool post spindle 4 is connected to a rotary drive (not shown) for transmitting a rotary driving force to the rotary tool of the tool holder 6 mounted. Generally, 15/11 KW · 3600 rpm is used as the rotation drive device. The transmission torque in this case is about 10
kg · m.

FIG. 2 is a cross-sectional view for explaining a state in which the tool holder 6 is mounted on the tool post spindle 4.
The tool holder 6 has a tapered tapered shape and a pull stud 7 formed by integrating two cylindrical bodies having different diameters at a tip end.
a, a rotating shaft 9 having a V-shaped flange portion 7b and a phase determining ring 8 at the rear end of the clamping portion 7, and a reduction mechanism 10 at the rear of the rotating shaft 9. The hob shaft 12 is connected to the hob shaft 12, and the hob 11 for gear cutting is mounted on the hob shaft 12 via a key 11a.

FIG. 3 is an enlarged view of a portion P in FIG. The tip end of the hob shaft 12 is tapered and is supported by a fitting portion 14 formed on the end surface of the tool post 3 on the side of the tool post main shaft 4 via a rotation support mechanism 13. The rotation support mechanism 13 includes a support container 16 rotatably supported by the fitting portion 14 via a bearing 14a, and a tapered shape at the tip end of the hob shaft 12 via a disc spring 17 inside the support container 16. Hole 15a that matches
And a positioning block 15 having the following. The positioning block 15 is slid in the support container 16 by the action of the disc spring 17 and is prevented from falling off by a snap ring 18 attached to an open end of the support container 16.

When the tool holder 6 is mounted on the tool post main shaft 4, the hob shaft 12 is inserted into the hole 15a of the positioning block 15 and presses the positioning block 15 so that the hob shaft 12 is pressed. The disc spring 17 is contracted by the pressing force. When a rotational driving force is applied to the hob shaft 12 via the rotary shaft 9 and the reduction mechanism 10, the hob shaft 1
2, the supporting container 16 is configured to rotate with respect to the fitting portion 14.

The speed reduction mechanism 10 is fixed to a first gear 10a provided at a rear portion of the rotary shaft 9 and a rear portion of a hob shaft 12 of the hob 11 by a drawing bolt 12b so as to mesh with the first gear 10a. And a second gear 12a. In this embodiment, the speed reduction ratio of the speed reduction mechanism 10 is set to 3. Therefore, by decelerating using the speed reduction mechanism 10, the rotational driving force transmitted from the rotational driving device to the rotating shaft 9 is reduced to 120.
It is converted to a high torque of 0 rpm (MAX) and 30 kg · m. That is, the rotational speed and the torque are converted into gears suitable for hobbing by the hob 11.

The rear end of the rotary shaft 9 and the rear end of the hob shaft 12 are rotatably supported via a bearing 20 on a casing 19 covering the first gear 10a and the second gear 12a. In the casing 19, the speed reduction mechanism 10 is sealed by a seal 19a, and a support member 21 extending toward the surface of the tool post 3 is integrally fixed to an end of the speed reduction mechanism 10. This support member 21
Is provided with a locking mechanism 22 at the distal end thereof, and through the locking mechanism 22, the tool rest 3 on the side of the tool rest main shaft 4 is provided.
It is supported by the fitting portion 23 formed on the surface. The support member 21 has a substantially circular arc shape, and is made of a material that is lightweight and has a high Young's modulus. In addition, the casing 19 and the support member 21 in the present embodiment correspond to the processing reaction force receiving member in the present invention. Further, the locking mechanism 22 in the present embodiment corresponds to the buffer member in the present invention.

FIGS. 4A and 4B are enlarged sectional views (a) and (a) of a portion Q in FIG. 2 in a state where the tool holder 6 is mounted on the tool post main spindle 4.
2 (b) and FIG. 2 (c) are shown, respectively. 5 is an enlarged cross-sectional view (part (A)) of FIG. 2 in a state where the tool holder 6 is detached from the tool post spindle 4 (a). (C) is shown respectively. The locking mechanism 22 includes:
A tapered engaging member 2 having a tapered distal end via a disc spring 24 in a concave portion 21a formed at the distal end of the support member 21
5 is provided slidably. A block 23b having a hole 23a matching the tapered shape of the tip of the engaging member 25 is fitted in the fitting portion 23.

A groove 26 is provided on a side surface of the engaging member 25, and a stroke of the engaging member 25 is adjusted by a pin 27 mounted on the side of the supporting member 21 in the groove 26. It is configured as follows. Also,
A bar 28 for determining the phase of the support member 21 is provided on a side surface of the engagement member opposite to the surface having the groove 26.
The slide guide 29 is fixed to the phase determining ring 8 through a slide guide 29 formed in a rectangular shape so that the bar 28 does not hinder the sliding operation of the engagement member 25. Shape. The phase determining ring 8 is provided with a groove 30 having a shape to which the tip of the bar 28 can be attached and detached so as to maintain the relative positional relationship between the rotating shaft 9 and the engaging member 25. The phase of the groove 30 is provided on the outer periphery of the phase determining ring 8 and can be arbitrarily set with a set bolt.

According to the locking mechanism 22, the tool holder 6
When the tool is mounted in the tool post spindle 4, the tip of the engaging member 25 is inserted into the hole 23a of the block 23b, and the block 23b is pressed. Is contracted and the support member 21 is
Get inside. At this time, the bar 28 is pulled down relative to the phase determining ring 8 together with the engagement member 25, and the tip of the bar 28 is separated from the groove 30 of the phase determining ring 8, and (See FIG. 4C). Thus, the support member 21 is supported by the fitting portion 23.

On the other hand, when the tool holder 6 is disengaged from the tool post main spindle 4, the tip of the engaging member 25 is
a, the pressing force is not applied to the disc spring 24, and the disc spring 24 extends to push the engagement member 25 up from the recess 21a of the support member 21. At this time, the bar 28 is lifted together with the engaging member 25, and is lifted relatively to the phase determining ring 8, and its tip is fitted into the groove 30 (see FIG. 5C). Thus, the phase position on the tip side of the support member 21 is held so as to be stable.

FIG. 6 is a view as viewed in the direction indicated by the arrow F in FIG. In the tool holder 6, the central axes of the hob shaft 12, the rotary shaft 9 and the support member 21 are respectively arranged on a straight line in order, and the support member 21 is cut through the hob shaft 12 and the rotary shaft 9. It faces the work W. Further, a fitting portion 14 for supporting the hob shaft 12 and a support member 2
The fitting portion 23 that supports the first tool post 1 is disposed so as to face the center of the tool post main shaft 4.

When the tool holder 6 is not used, it is held in a tool magazine (not shown). When the tool holder 6 is mounted on the tool post main spindle 4, an automatic attachment / detachment device (not shown) having an ATC arm 31 is used. It is taken out of the tool magazine and mounted on the tool post spindle 4. That is, the ATC arm 31 grasps the V-shaped flange portion 7b at the rear end of the clamp portion 7, takes it out of the tool magazine, and fits the clamp portion 7 into the tool post main shaft 4. At this time, since the phase of the support member 21 and the hob shaft 12 is determined with respect to the clamp portion 7, their tips are supported by the fitting portions 14 and 23, respectively. Next, the pull stud 7a of the clamp portion 7 is pulled in by the collet claw 33 (see FIG. 2) by the well-known clamp mechanism 32 provided on the tool post main shaft 4, and the mounting of the tool holder 6 is completed.

Thereafter, the tool rest 3 is moved in the X, Y and Z directions by a predetermined amount so that the hob 11 and the gear cutting surface of the work W to be mounted on the headstock 2 are automatically opposed to each other. The hob 1 is moved by a predetermined amount in the B-axis direction.
The lead angle of 1 is automatically adjusted. The hob 11
Is set by Asin (m × π / hob PCD) (where m is a module).

Subsequently, when the rotary drive device is operated, the rotary drive force is transmitted to the clamp portion 7 to rotate the rotary shaft 9, and the rotary drive force is transmitted to the hob shaft 12 via the speed reduction mechanism 10. You. In this way, the hob 11 rotates to perform the gear cutting on the workpiece W. Further, the tool rest 3 is moved in the Y-axis direction by a predetermined amount, and the position of the hob 11 with respect to the workpiece W is moved to perform the gear cutting.

On the other hand, from the tool post spindle 4 to the tool holder 6
Similarly, when the VTC flange 31 is grasped by the ATC arm 31 and the retraction of the clamp 7 by the clamp mechanism 32 is released, the clamp 7 is detached from the tool post spindle 4. Then, as described above, the support member 21 is locked on the phase determining ring 8 and is conveyed into the tool magazine.

According to the present embodiment, the mounting of the tool holder 6
Since the detachment (tool change) and the setting of the advance angle of the hob 11 (movement in the B-axis direction) can be easily and automatically performed, the effect that the setup time and labor can be reduced can be achieved. To play. The case where the multi-tasking machine 1 of the present embodiment is used and the case of Japanese Patent Application No. 10-297819 filed earlier.
In comparison with the case where the hob unit described in No. 1 is used, the tool change time of the multi-tasking machine 1 of the present embodiment is 10 seconds.
Although the lead angle setting time is 1 second, the tool change time of the hob unit of the prior application (Japanese Patent Application No. 10-297819) is 12 minutes, and the lead angle setting time is 10 minutes. It is apparent that the multi-tasking machine 1 greatly reduces the tool change time and the lead angle setting time. When the hob 11 of the tool holder 6 is replaced due to damage such as wear, the tool holder 6 is detached from the tool post main spindle 4 and the hob 11 is replaced. It does not affect the processing work of.

According to the present embodiment, the hob shaft 12 of the hob 11
, The tip is supported by the fitting portion 14 on the surface of the tool post 3,
The rear end portion is supported by the insert portion 23 on the surface of the tool post 3 via the casing 19 and the support member 21 and has a two-sided structure, so that the tool rigidity and the vibration control ability can be improved. Thus, it is possible to improve the machining efficiency and machining accuracy of the work W to be machined and to improve the tool life. In addition, the supporting member 21 receives a processing reaction force during gear cutting,
The support member 21 is structured to be slidable in the axial direction by the locking mechanism 22 and the occurrence of bending due to the reaction force is suppressed, so that the tool rigidity and the vibration control ability are more reliably improved. I have.

The multi-tasking machine 1 of the present embodiment and the conventional
No.-53323, JP-A-4-269137), a shaft gear (φ90 × 400L, M
3, Z28, 200L). When comparing the machining efficiencies when machining, respectively, the machining time of the multi-tasking machine of this embodiment was 30 minutes, whereas the machining time was 30 minutes.
It is apparent that the machining time by the multi-functional machine described in Japanese Patent Application Laid-Open No. 4-269137 is 60 minutes, and the processing time by the multi-functional machine described in Japanese Patent Application Laid-Open No. 4-269137 is 60 minutes.

According to the present embodiment, the casing 19
Is prevented from protruding from the outer peripheral surface of the hob 11 facing the workpiece W, and interference with the workpiece W is suppressed. Therefore, the present invention is applicable to workpieces W of various shapes and sizes. Thus, there is an effect that the operation range can be expanded. Further, since the support member 21 is formed in a substantially circular arc shape and has a shape that does not easily bend with respect to the processing reaction force,
Tool rigidity is high and vibration is suppressed.

According to the present embodiment, since the rotational driving force transmitted from the rotational driving device by the speed reduction mechanism 10 can be converted into the rotational speed and the high torque suitable for the hobbing by the hob, stable gear cutting can be achieved. This produces an effect that machining and heavy cutting can be performed. Further, according to the present embodiment, since the movement in the Y-axis direction can be performed, the position of the hob 11 facing the workpiece W is shifted,
This has the effect of preventing wear concentration of the hob 11 and extending the tool life.

In this embodiment, the front end of the hob shaft 12 is configured to be supported by the fitting portion 14 via the rotation support mechanism 13. However, the present invention is not limited to this. The portion may be provided with a pull stud in which cylindrical bodies having different diameters are integrated, and may be configured to be drawn into the tool post 3 by a mechanism similar to the clamp mechanism of the clamp section 7.

In this embodiment, the speed reduction mechanism 10 is the first
Although it is constituted by a parallel shaft reduction mechanism configured to engage the gear 10a and the second gear 12a, the invention is not limited thereto, and a planetary reduction mechanism may be used. It is also desirable that the reduction ratio is arbitrarily changed according to the rotation speed and the torque of the rotary drive device.

Next, another embodiment of the tool holder 6 that can be attached to and detached from the tool post main spindle 4 of the multi-tasking machine 1 of this embodiment will be described. FIG. 7 shows a cross-sectional view (a) and a rear view (b) of a state in which the tool holder 6 ′ is mounted on the tool post spindle 4. The tool holder 6 ′ is used for the tool post spindle 4.
From the hob 11 via the clamp 7
In other respects, there is basically no difference in the tool holder 6 of the previous embodiment. Therefore, the same reference numerals are given to the same parts as those in the previous embodiment, and the detailed description thereof will be omitted.

In the tool holder 6 ', a hob shaft 12' is fixed to the rear end of the clamp portion 7 via a V-shaped flange portion 7b and a phase determining ring 8, and the hob shaft 12 'is connected to the hob shaft 12' via a key 11a. The hob 11 is mounted. The rear end of the hob shaft 12 'is connected to a support piece 34 rotatably supported via a bearing 20 in an L-shaped support member 21' by a pull-in bolt 12b. The support member 21 ′ is provided with a locking mechanism 22 at the distal end portion, and is supported by the fitting portion 23 on the surface of the tool post 3 when the support member 21 ′ is mounted on the tool post main shaft 4 as in the previous embodiment. It is configured as follows. At this time, the groove 3 of the phase determining ring 8 is used.
The tip of the bar 28 fitted in the cylinder 0 is separated from the groove 30.

The tool holder 6 'thus constructed
As in the previous embodiment, the V-shaped flange portion 7b is grasped by the ATC arm 31 and the clamp portion 7 is inserted into the tool post main shaft 4 and then clamped by the clamp mechanism 32. Next, the hob 11 is arranged on the gear cutting surface of the work W to be cut by the tool post 3, and a rotational driving force from a rotational driving device (not shown) is transmitted to the hob shaft 12 '.
Gear cutting is performed. In this manner, substantially the same effects as in the previous embodiment can be obtained.

In each of the above embodiments, the support members 21 and
The locking member 25 provided at the distal end of the support member 21 '
A locking mechanism 22 is used which has a structure slidable with respect to the support members 21 and 21 'by the action of a disc spring 24 built in the recesses of the first and second 21', but is not limited thereto. 8
As shown in FIG. 2, the tip of the support member 21 ″ is tapered to form a fitting portion 2 formed on the surface of the tool post 3.
The positioning mechanism 35 may be provided with a positioning block 35 having a hole 35a that matches the tapered shape of the tip of the support member 21 "via a disc spring 24 '. The inside of the fitting portion 23 is made slidable in the axial direction by the action of the disc spring 24 ', and is prevented from falling off by the snap ring 18 attached to the open end of the fitting portion 23. When the tool holders 6, 6 ′ are mounted on the tool post spindle 4, the support member 21 ″ has a hole 35
a, the positioning block 35 is pressed slightly, and the disc spring 24 'is contracted to be supported, and is slid in the axial direction so as not to bend by the reaction force during the gear cutting. ing.

Further, inside the support member 21 ″, a bar 29 ′ that is formed in a hole 29 ′ having a rectangular cross section formed in a direction perpendicular to the sliding direction and protrudes toward the phase determining ring 8. Further, a bar support member 2 ″ is provided inside the support member 21 ″ in a sliding direction, that is, in a vertical hole portion 29 ″ formed in the hole portion 29 ′ from the tip end.
8 "is provided, and the rear end of the bar support member 28" is connected to the bar 28 '. Before the tool holders 6, 6 'are mounted in the tool post spindle 4, the tip of the bar support member 28 "is connected to the tip of the support member 21", and the tip of the bar 28'. The portion is fitted in the groove 30 of the phase determining ring 8 and is held so that the phase position on the tip side of the support member 21 ″ is stabilized. A projecting member 36 is provided at the bottom of the fitting portion 23. The tool holders 6, 6 'are mounted in the tool post main spindle 4, and the tip of the support member 21 "is positioned at the positioning block 35.
When the protruding member 36 is pushed up, the projecting member 36
The bar support member 28 "is pushed down by penetrating into the vertical hole 29" from the tip of the bar. In this way, the bar 28 'is pushed down with respect to the phase determining ring 8, and the leading end thereof is in the groove 30.
It is configured to escape from. With this configuration,
As in the previous embodiment, the support member 21 ″ is provided by the bar 28 ′.
Is stably held.

In each of the above embodiments, the support members 21, 21 'are slidable in the axial direction by the action of the disc springs 24, 24'. However, the present invention is not limited to this. By using a hydraulic pressure instead of 24 ', the support members 21, 21' can be slidable in the axial direction.

Next, a multi-tasking machine 1 'according to a second embodiment of the present invention will be described. FIG. 9 is a perspective view of a main part of a multi-tasking machine 1 'according to the second embodiment. FIG.
2A is an enlarged view of a main part of the multi-tasking machine 1 ', and FIGS.

In the multitasking machine 1 'of the second embodiment,
A headstock 2 'for rotatably supporting the workpiece W around a spindle (C axis) is provided, and a tool rest 3' for processing the workpiece W is provided.
Z axis parallel to the axis, Y axis orthogonal to the Z axis, YZ
B in the circumferential direction of the X-axis and Y-axis directions perpendicular to the plane
It is movable in each direction of the axis. A tool station (tool axis and the first embodiment of the present invention) to which a tool holder having fixed tools such as the tool holders 6 and 6 ′ and a cutting tool and rotating tools such as a drill and a milling cutter can be attached and detached is provided on the tool rest 3 ′. 4 ′), and is rotatably held with its axis orthogonal to the Y-axis direction.
A turret 5 'having a drive source (not shown) for driving the rotary tool is provided. Note that the tool rest 3 ′ and the turret 5 ′ in the present embodiment correspond to a processing portion in the present invention.

In the vicinity of the tool station 4 'on the end face of the turret 5', fitting portions 14 ', 2 for supporting both ends of the hob shafts 12, 12' of the tool holders 6, 6 '.
3 ′ is provided, and the hob shaft 1 of the tool holder 6, 6 ′ is provided.
2, 12 'are configured to be supported at both ends.
When only the tool holder 6 'is used, it is sufficient that only the fitting portion 23' is provided.

According to the multi-tasking machine 1 'constructed as described above, the tool holders 6, 6' having the same structure as in the first embodiment can be automatically attached to and detached from the tool station 4 '. The same operation and effect can be obtained.

[Brief description of the drawings]

FIG. 1 is a perspective view of a main part of a multi-tasking machine according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view illustrating a mounted state of a tool holder.

FIG. 3 is an enlarged view of a part P in FIG. 2;

FIG. 4 is an enlarged cross-sectional view (a), an arrow B view (b) and an arrow C view (c) of a portion Q when the tool holder is mounted.

FIGS. 5A and 5B are an enlarged sectional view (A), a view (D), and a view (E), respectively, of the part Q when the tool holder is detached.

FIG. 6 is a view on arrow F of FIG. 2;

FIG. 7 is a sectional view (a) and a rear view (b) of another embodiment of the tool holder.

FIG. 8 is a diagram illustrating another embodiment of the locking mechanism.

FIG. 9 is a perspective view of a main part of a multi-tasking machine according to a second embodiment of the present invention.

FIGS. 10A and 10B are an enlarged view of a main part of the multi-tasking machine according to the second embodiment, and FIG.

[Explanation of symbols]

 1,1 'Multi-tasking machine 2,2' Headstock 3,3 'Turret (machining part) 4 Turret spindle (tool axis) 4' Tool station (tool axis) 5 'Turret 6,6' Tool holder 7 Clamp Part 7a Pull stud 7b V-shaped flange part 8 Ring for determining phase 9 Rotating shaft 10 Reduction mechanism 10a First gear 11 Hob 11a Key 12 Hob shaft 12a Second gear 12b Retraction bolt 13 Rotation support mechanism 14, 14 'Fitting part 15 Positioning block 16 Support container 17 Belleville spring 18 Snap ring 19 Casing 21 Support member 22 Locking mechanism (buffer member) 23, 23 'Fitting portion 24 Belleville spring 25 Engagement member 28 Bar 28' Bar support portion 29 Slide guide 29 " Vertical hole 30 Groove 31 ATC arm 32 Clamp 33 Collet claw 35 Positioning block 36 Projecting member

Claims (7)

[Claims] 1. A headstock for supporting a work to be machined around a spindle, a Z-axis parallel to the spindle, a Y-axis orthogonal to the Z-axis,
A processing part movable in each of an X-axis perpendicular to the YZ plane and a B-axis in a circumferential direction of the Y-axis, and a tool holder provided with a processing tool in the processing part; In a multi-tasking machine including a tool shaft capable of transmitting a rotational driving force to the machining tool, the tool holder, a clamp portion that can be attached to and detached from the tool shaft,
A hob shaft fixed to the clamp portion, a hobbing hob mounted on the hob shaft, and a rear end portion of the hob shaft rotatably held, one end of which is directed toward the tool shaft of the processing portion. A machining reaction force receiving member which is extended and provided, and a fitting portion which supports one end of the machining reaction force receiving member near the tool axis of the machining section. 2. A headstock for supporting a workpiece to be machined around a spindle, a Z-axis parallel to the spindle, a Y-axis orthogonal to the Z-axis,
A processing part movable in each of an X-axis perpendicular to the YZ plane and a B-axis in a circumferential direction of the Y-axis, and a tool holder provided with a processing tool in the processing part; In a multi-tasking machine including a tool shaft capable of transmitting a rotational driving force to the machining tool, the tool holder, a clamp portion that can be attached to and detached from the tool shaft,
A rotating shaft fixed to the clamp portion, a hob shaft connected to the rotating shaft via a speed reduction mechanism, a hobbing hob mounted on the hob shaft, and a rear end of the hob shaft are rotated. A machining reaction force receiving member having one end extended toward the vicinity of the tool axis of the machining section, and rotatably supporting the end of the hob shaft near the tool axis of the machining section. And a fitting portion that supports one end of the machining reaction force receiving member. 3. The multi-tasking machine according to claim 1, wherein the machining reaction force receiving member is supported by a fitting portion via a buffer member and is displaceable in a hob axial direction. 4. The multi-tasking machine according to claim 1, wherein a portion of the machining reaction force receiving member located on the side of the hob has a substantially arc-shaped cross-sectional shape. 5. The processing reaction force receiving member according to claim 1, wherein the portion located on the side of the hob is disposed at a position facing the work to be cut via the hob. Multi-tasking machine. 6. The multi-tasking machine according to claim 2, wherein the speed reduction mechanism is a parallel axis speed reduction mechanism. 7. The multi-tasking machine according to claim 1, further comprising an automatic attachment / detachment means for automatically attaching / detaching the tool holder to / from a tool shaft.