JP2022100421A - Pushing and pulling device - Google Patents

Abstract

To provide a switchgear device for controlling opening and closing a chuck via a draw bar.SOLUTION: A switchgear device 20 is provided for controlling opening and supporting of a workpiece supporting mechanism 71 arranged on the front side of a main spindle by longitudinally moving a draw bar 15 that rotates together with a main spindle 12 in the direction of a central axis 9 of the main spindle. The device 20 includes: an actuator 30 via which a piston 35 that transmits force in both longitudinal directions moves longitudinally in the central axis direction relative to the draw bar; and a bearing assembly 50 for rotatably connecting the piston to the draw bar. The bearing assembly includes a thrust-type first bearing unit 51 arranged on the front side of the piston and including an angular bearing with at least three row combinations, and a radial second bearing unit 52 arranged on the rear side of the piston.SELECTED DRAWING: Figure 2

Description

The present invention relates to a device that opens and closes a collet chuck or the like that grips a work via a spindle.

In Patent Document 1, in a chuck device in a machine tool, in order to suppress the power consumption of a motor, a bearing (coordinating means) rotatably supports a piston (driving unit) with respect to a spindle, and an inertia generated by the piston. It is described that the force is not used as the load of the motor, the load of the motor is reduced, and the power consumption of the machine tool is suppressed.

Patent Document 2 discloses an apparatus for processing a rotating shaft outer peripheral surface having a runout at the tip of an alternator rotor or the like with high accuracy without performing core correction or the like of the rotating shaft. In this device, in a rotor in which the rotor shaft is press-fitted and fixed to the pole core, the base end portion of the rotor shaft is gripped by the collet chuck of the drive side rotating portion, and the support pin at the tip of the support portion provided on the driven side rotating portion that rotates synchronously. Is displaced by the amount of deflection of the tip with respect to the preset reference axis. In this state, both rotating portions are rotated to revolve the support pin with respect to the reference shaft, and the outer peripheral surface of the slip ring at the tip of the rotor shaft is machined.

Japanese Unexamined Patent Publication No. 2013-141720 Japanese Unexamined Patent Publication No. 2014-87923

The chuck closes when the drawbar is pushed (tip side, front side, forward movement) and closes when the work is gripped, and when the drawbar is pulled (rear side, backward movement). There is a device for gripping the work, but in either case, the push-pull device needs to transmit a force for reliably gripping the work to the chuck, and further, the generation of frictional force due to rotation should be suppressed to a low level. Is desirable. It is desirable to arrange thrust type bearings in order to receive the load in the axial direction (axial direction), but arranging an excessive number of bearing stages increases the cost and increases the resistance to the rotation of the shaft. Eh.

One aspect of the present invention is to move a drawbar that rotates with the spindle back and forth in the direction of the central axis of the spindle to open and support (open / close, open and grip) the work support mechanism provided on the front side (tip) of the spindle. It is a push-pull device (switchgear) that controls. The push-pull device has an actuator in which a piston that transmits a force in both front and rear directions moves back and forth in the central axis direction with respect to the draw bar, and a bearing assembly that rotatably connects the piston to the draw bar. The bearing assembly is a thrust type first bearing unit arranged on the front side of the piston, the first bearing unit including at least three rows of angular bearings, and a radial type arranged on the rear side of the piston. Includes a second bearing unit and.

This push-pull device has an asymmetric bearing arrangement in front of and behind the piston, with the thrust type first bearing unit placed on the front side near the work support mechanism of the piston and the radial type second bearing unit placed on the opposite side. including. In many devices, bearings are symmetrically arranged before and after an actuator such as a motor or piston so that the axial load in the front-back direction of the shaft can be applied almost evenly. In contrast, this push-pull device has a first bearing unit and a second bearing unit that are asymmetrically arranged, and the axial load is at least three rows of combinations arranged in front of the piston where the load is generated. It is covered by a thrust type first bearing unit composed of an angular bearing. This makes it possible to make the second bearing unit arranged at the rear a simple radial type configuration. Further, by arranging the bearing units in front of and behind the piston, the moment-bearing load of the spindle with respect to the piston is sufficiently secured. Therefore, at low cost, a push-pull device with a bearing assembly capable of appropriately supporting the opening and supporting of the work support mechanism, for example, the axial load and the moment load between the piston and the spindle for opening / closing, opening and gripping, is provided. can.

The first bearing unit includes a first angular bearing that receives an axial load on the front side, a second angular bearing that receives an axial load in the support direction of the work support mechanism, for example, the closing direction of the collet chuck, and an axial load on the rear side. It may include a third angular bearing that receives. The first and third angular bearings receive the open and support axial loads of the workpiece support mechanism, and the second angular bearings between them receive the support direction loads. As a result, the push-pull device can be rotated more stably while the work is gripped by a support mechanism such as a chuck. The rearmost angular bearing of the first bearing unit may be located approximately in the center of the piston. The first bearing unit having at least a three-row combination can be stored compactly, and the distance between the first and second bearing units can be secured.

The push-pull device may be a device operated by compressed air. That is, the push-pull device may have an air supply unit that supplies air to drive the piston to the actuator. Further, the air supply unit may include an air tank for power failure countermeasures attached to each of the push-pull devices. Compared to hydraulically operated push-pull devices, air-operated push-pull devices can simplify the structure in terms of seals, etc., but on the other hand, they have the force to continuously hold the work in the event of a power outage or loss of compressed air (air loss). Hard to get. By attaching an air tank to the push-pull device here, the force to hold the work for a certain period of time until the rotation speed of the push-pull device and / or the processing device equipped with the push-pull device decreases due to a power failure. Easy to secure continuously.

One of the other aspects of the present invention is the above-mentioned push-pull device, a draw bar to which the push-pull device is connected to one end side, and a work support mechanism provided at the tip of the main shaft and controlled by the draw bar, for example. It is a device (support device, holding device) having a collet chuck and a motor for rotationally driving the spindle. This device may be a processing device having a processing unit for processing a work supported by a work support mechanism.

The figure which shows an example of a processing apparatus. The figure which shows an example of a switchgear. The figure which shows a different example of a switchgear. The figure which shows an example of the support device.

FIG. 1 shows a schematic configuration of a lathe (machining device) which is an example of a device for gripping and machining a work with a chuck. This processing device 1 is a support device that grips and turns a work (workpiece, a member to be machined, a rod to be machined) 5 by a work support mechanism housed in a head 70 of a spindle 12, in this example, a collet chuck 71. (Work support device, holding device, swivel unit) 10 and a processing unit 80 provided with a tool 81 for processing the work 5.

The support device 10 is provided with a spindle 12 rotatably supported by the headstock 11, a head 70 provided at one end (front) 9a of the spindle 12, and rotating around the central axis 9 together with the spindle 12, and a head 70. A chuck (collet chuck) 71 housed in the center, a draw bar (shaft) 15 that penetrates the spindle 12 along the central axis 9 to operate the collet chuck 71, and a unit (opening / closing device, push) that opens and closes the chuck 71 by the draw bar 15. A pulling device) 20, a motor 13 for rotationally driving the spindle 12, and an air supply system (air supply unit) 100 for supplying air for operating the opening / closing device 20 are included.

The draw bar 15 rotates together with the main shaft 12 and further moves back and forth in the direction of the central shaft 9 to open and close the collet chuck 71, which is a support mechanism for the work 5, to open and support (grip) the work 5. The draw bar 15 is a hollow type shaft and includes a through hole 16. The draw bar 15 penetrates the spindle 12 and the switchgear 20. Therefore, the through hole 16 of the draw bar 15 is used as a path (supply path) for supplying the unprocessed work 5 to the chuck 71 from the rear 9b of the spindle 12 and / or a path (discharge path) for discharging the processed work 5. Can be used. The work 5 may be supplied and discharged from the front to the chuck 71.

The air supply system 100 includes an air pipe 103 that supplies compressed air supplied from an appropriate compressed air source, for example, an external compressor 111, to the opening / closing device 20, and a valve that controls the intake / exhaust of air to the opening / closing device 20, for example. It includes solenoid valves (control valves) 106 and 107, an air tank 108 for temporary failure to temporarily hold compressed air via a check valve (check valve) 109, and an oiler (lubricator) 105.

The processing apparatus 1 further includes a control unit 90 that controls the overall operation of the processing apparatus 1. The control unit 90 includes hardware resources including a CPU and a memory, and controls the processing apparatus 1 according to an algorithm specified in a program (program product). The control unit 90 controls the position of the tool 81 via the valve control unit 91 that controls the on / off control valves 106 and 107, the motor control unit 92 that controls the on / off of the motor 13, and the actuator of the machining unit 80. Includes unit 93.

FIG. 2 shows a schematic configuration of a switchgear (push-pull device) 20 and a head 70 by a sectional view. The switchgear 20 rotatably connects the piston 35 to the draw bar 15 with the actuator 30 in which the piston 35 transmitting the force in both directions X in the front-rear direction moves to the front-rear X in the direction of the central axis 9. It has a bearing assembly 50 to be used. The bearing assembly 50 includes a thrust type first bearing unit 51 arranged on the front side 9a of the piston 35 and a radial type second bearing unit 52 arranged on the rear side 9b of the piston 35. The first bearing unit 51 includes at least a three-row combination bearing set (angular bearing) 55. When the actuator 30 moves the draw bar 15 to the rear (opening direction, open side) P1 via the piston 35 and the bearing assembly 50, the chuck 71 opens and the work is released, and the actuator 30 moves the draw bar via the piston 35 and the bearing assembly 50. When 15 is moved forward (closed direction, supporting direction, gripping direction) P2, the chuck 71 closes and the work is gripped.

The actuator 30 of this example is a cylinder type in which the piston 35 moves internally in the axial direction 9 in the front-rear direction X. The piston 35 has a disc portion (piston body) 35a that extends radially with respect to the shaft 9 so as to receive air pressure, and a base portion (piston rod) that extends axially along the drawbar 15 on the center side of the disc portion 35a. ) 35b and the like. The base portion 35b is hollow, and the draw bar 15 penetrates the inside thereof, and the draw bar 15 and the piston rod 65 are rotatably connected by a bearing assembly 50 that transmits force in both front and rear directions. Therefore, the piston 35 moves synchronously with the draw bar 15 in both front-back directions (both directions of P2 and P1), and pushes and pulls the draw bar 15 back and forth to operate (control) the chuck 71, which is a work support mechanism.

The bearing assembly 50 includes a thrust type first bearing unit 51 arranged on the front side 9a of the piston 35 and a radial type second bearing unit 52 arranged on the rear side 9b. The first bearing unit 51 has a first angular bearing 56 that receives an axial load on the front side 9a from the front side 9a, a support direction of the work support mechanism, and a front side in which the chuck 71 grips the work 5 in this example. Includes a three-row combination bearing set 55 consisting of a second angular bearing 57 that receives the axial load of 9a and a third angular bearing 58 that receives the axial load of the rear 9b. The second bearing unit 52 includes a single row radial bearing 59. The radial bearing may be a deep groove ball bearing capable of carrying an axial load in both directions.

Angular bearings (angular ball bearings) 56, 57 and 58 are ball bearings capable of applying a radial load and an axial load in one direction, and the ball and the inner ring / outer ring have a contact angle. The larger the contact angle, the better the load capacity of the axial load, and the smaller the contact angle, the more advantageous for high-speed rotation. The first bearing unit 51 is in the closing direction in which the chuck 71 grips the work 5 in addition to the first and third angular bearings 56 and 58 that receive the axial loads of the front side 9a and the rear side 9b, respectively. A second angular bearing 57 that receives the axial load of the front side 9a is arranged. Therefore, in the switchgear 20, when the load becomes large, the axial load of the front side 9a can be applied by the two angular bearings 56 and 57, and the angular bearings 56 and 57 having a relatively small contact angle suitable for high-speed rotation can be applied. Therefore, the bearing set 55 that receives the thrust load can be configured.

Further, the first bearing unit 51 has a contact angle extending from the front side 9a to the front side 9a toward the shaft 9 so as to receive the axial load of the front side 9a, and the contact angle to the shaft 9 as well. It is provided with a set 55 of a second angular bearing 57 extending toward the front side 9a and a third angular bearing 58 having a contact angle extending toward the rear side 9b toward the shaft 9 so as to receive an axial load of the rear side 9b. Therefore, the first bearing 56 and the third bearing 58 form a bearing set that is combined on the rear surface with the second bearing 57 interposed therebetween, and can form a bearing set 55 having a large moment overload capacity and high rigidity. Further, the first bearing 56 and the second bearing 57 are combined in parallel, and the load capacity of the front side 9a, that is, the thrust (axial load) in the closing direction of the chuck 71 can be improved. The second bearing 57 and the third bearing 58 are combined on the rear surface, and the load capacity of the moment load can be improved even in this set.

As described above, in the bearing assembly 50 of the switchgear 20 of this example, the first bearing unit 51 of the three-row combination is mounted on the front side 9a near the chuck 71 that supports the work of the piston 35 so as to mainly receive the thrust load. It has an asymmetric bearing arrangement in front of and behind the piston 35, in which a second bearing unit 52 having a simple radial structure is arranged on the opposite rear side 9b. The bearing assembly 50 is generated by moving the piston 35 back and forth, and in particular, the axial load generated by gripping (supporting) the work 5 is at least three rows arranged on the front side of the piston 35 where the load is generated. It is loaded by a thrust type first bearing unit 51 composed of a combination of angular bearings. From this, the second bearing unit 52 arranged at the rear has a single row structure of the radial type bearing 59, and has an extremely simple configuration, thereby improving the ability to cope with high-speed rotation. On the other hand, since the bearing units 51 and 52 are arranged in front of and behind the piston 35, it is possible to secure a sufficient distance between the bearing units 51 and 52, and the disk portion 35a of the piston 35 is placed in the front-rear direction. The bearing assembly 50 has a sufficient load capacity for a moment load due to movement. Therefore, it is possible to provide a switchgear 20 provided with a bearing assembly 50 capable of appropriately supporting an axial load and a moment load between the piston 35 and the draw bar 15 accompanying the opening and support of the chuck 71, which is a work support mechanism, at low cost. ..

In the bearing assembly 50, the angular bearing 58 on the rearmost side 9b of the first bearing unit 51 is arranged in the vicinity of substantially the center (center in the axial direction) of the piston 35. The first bearing unit 51 having a three-row combination can be arranged on the short base portion 35b, and the entire switchgear 20 can be compactly configured. Further, by arranging the bearing in the center of the disk portion 35a having the largest mass, the rigidity of the base portion 35b can be ensured, and a switchgear 20 capable of stable high-speed rotation can be provided.

The cylinder portion 36 of the actuator 30 includes front and rear side plates 37a and 37b, a ring member 37c sandwiched between them, and a plurality of bolts 37d for fixing them, and a space in which the piston 35 moves is formed therein. ing. The cylinder portion 36 is fixed to the headstock 11 by an arm 38 extending from the side plate 37b so as not to rotate.

The disk-shaped piston 35 housed inside the cylinder portion 36 slides in the axial direction (front-back direction) X while maintaining the airtightness by the O-ring 39 inside the cylinder portion 36. Since the piston 35 is connected to the draw bar 15 via the bearing assembly 50, the piston 35 does not rotate even if the draw bar 15 rotates, and only in the axial direction (front-back direction) X with respect to the fixed cylinder portion 36. Slide. Therefore, the hermeticity can be maintained for a long period of time with a simple configuration using the O-ring 39. The sealing method is not limited to the O-ring, and a known method such as a gasket or fin can be adopted. Further, by supplying the lubricating material (lubricating oil) together with the air that operates the piston 35 by the oiler 105 prepared in the air system 100, the friction between the piston 35 and the O-ring 39 and the like can be reduced, and the piston 35 can be smoothly performed. Can provide an opening / closing device 20 that moves.

Further, the switchgear 20 can drive the piston 35 by moving air or other gas or fluid in and out of the space 31 on the front side and the space 32 on the rear side of the piston 35 via a fixed cylinder portion 36. .. Therefore, a rotary contact for supplying a drive medium such as air or oil to the actuator 30 is unnecessary, and a low-cost and highly reliable switchgear 20 can be provided. Further, the actuator 30 is attached with a rod-shaped guide 37e extending rearward to the front side plate 37b, and the piston 35 slides back and forth without rotating by moving along the guide 37e.

The switchgear 20 includes inlets 21 and 22 that introduce compressed air into the spaces 31 and 32 before and after the piston 35 inside the actuator 30, respectively. These introduction ports 21 and 22 may be provided so as to penetrate the side plates 37b and 37a, or may be provided so as to penetrate the ring member 37c. By introducing compressed air into the front space 31 via the introduction port 21, the piston 35 can be moved to the rear P1, and the draw bar 15 can be moved to the rear P1 in conjunction with the piston 35. Further, by introducing compressed air into the rear space 32 via the introduction port 22, the piston 35 can be moved to the front P2, and the draw bar 15 can be moved to the front P2 in conjunction with the introduction.

When the piston 35 moves to the front P2, the piston 35 stops at the point where the work 5 is gripped, and the piston 35 and the front side plate 52b do not basically interfere with each other. On the other hand, when the piston 35 moves in the open direction, the rear side plate 52a can be used as a stopper. In this case, a cushioning material that cushions the impact of collision with the piston 35 may be arranged in the space 32 to reduce the impact and noise when the piston 35 comes into contact with the side plate 52a.

In this opening / closing device 20, the fluid that drives the piston 35 may be a highly viscous liquid such as oil, but since the actuator 30 does not rotate, a rotating contact for supplying the fluid is unnecessary, and compressed air or the like is not required. It is easy to handle, leak is not so worrisome, and a gas that can be obtained at low cost can be used as the working fluid. When air is used as a working fluid, by providing a small capacity air tank 108 attached to each switchgear 20, even if the supply of air from the compressed air source is stopped due to a power failure, the processing device The air pressure inside the actuator 30 of the switchgear 20 can be maintained for a period of time until the rotation speed of the spindle 12 of 1 decreases, and the work 5 can be safely held.

Further, in this switchgear 20, since the actuator 30 does not rotate, it is not necessary to cover the switchgear 20 with a housing, which is safe. Further, the bearing assembly 50 can rotationally support the rear end of the draw bar 15. Therefore, the draw bar 15 may be hollow, and the hollow portion (through hole) 16 may also serve as a path for supplying or discharging the work. The switchgear 20 further includes parts for incorporating the bearing assembly 50, such as a cap (bush) 17 for setting the bearing assembly 50.

The head 70 of the support device 10 is fixed to the front of the head 70 from the front 9a, and is connected by a chuck (collet chuck) 71 for gripping the work, a sleeve 75 for opening and closing the chuck 71, and a sleeve 75 and a connecting member 74. A shaft ring 73 is provided, and a draw bar 15 is attached to the shaft ring 73. The chuck 71 includes a tapered portion 72 whose outer circumference expands toward the front 9a, and the sleeve 75 includes an inner peripheral surface 75a which expands corresponding to the shape of the tapered portion 72. Therefore, when the draw bar 15 is moved to the rear opening direction P1 by the opening / closing device 20, the sleeve 75 moves to the rear 9b to open the chuck 71, and the work can be released from the chuck 71. When the draw bar 15 moves in the front closing direction P2 by the opening / closing device 20, the sleeve 75 moves forward 9a to close the chuck 71, and the work can be gripped by the chuck 71.

FIG. 3 shows a different switchgear (push-pull device) 20. The switchgear 20 corresponds to a support device 10 having a reverse opening / closing direction. The chuck (not shown) of the support device 10 closes to hold the work when the draw bar 15 moves to the rear side 9b and is pulled. On the other hand, when the draw bar 15 moves to the front side 9a and is pushed, the work is released. Therefore, in the switchgear 20, the rear side 9b is the closing direction P2, and the front side 9a is the opening direction P1. The switchgear 20 has the same basic configuration as the switchgear shown in FIG. 2, and the arrangement of the bearing sets 55 of the first bearing unit 51 is different. That is, in the first bearing unit 51, the first angular bearing 56 that receives the axial load on the front side (push side) 9a from the front side 9a and the support direction of the work support mechanism, in this example, the chuck grips the work 5. A three-row combination bearing consisting of a second angular bearing 57 that receives an axial load on the rear side (pull side) 9b in the closed direction and a third angular bearing 58 that receives an axial load on the rear side (pull side) 9b. Includes set 55. Since this bearing set 55 loads the axial load (thrust load) of the pull side (rear side) 9a holding the work by the two bearings 57 and 58, the work 5 is stably held on the pull side. It can be rotated at high speed.

FIG. 4 shows a different support device 10a. This support device 10a is a support device called a tailstock, and is used in combination with a headstock (not shown) that supports the processing side in a device for processing a work 5 such as a rotor of a motor. The head 70 of the tailstock 10a includes a collet chuck 71 that grips the shaft 5a of the work 5 by opening and closing, and a support pin 79 that moves forward and backward along the central axis 9 of the chuck 71. The collet chuck 71 is controlled by a hollow draw bar 15. The tailstock 10a is a shaft 18 that controls a support pin 79, and is a pressure shaft 18 that is concentrically arranged along a central axis 9 inside a hollow draw bar 15 and a pressure shaft with respect to the draw bar 15. A spring (coil spring) 19 for pushing the 18 toward the support side of the front 9a to project the support pin 79 to support the center of the shaft 5a of the work 5 is included.

The tail stock 10a, together with the head stock (not shown), temporarily holds the rotating shaft of the shaft 5a of the work 5 with the support pin 79 in a state where the chuck 71 is opened. When the distance between the tailstock 10a and the headstock is shortened while the work 5 is held by the support pin 79 and the support pin 79 is housed inside the chuck 71, the chuck 71 grips the shaft 5a of the work 5 from the outside and heads. Support at 70. The headstock side may grip the shaft on the opposite side of the work 5, or the headstock may support the work 5 only with the support pin because it is gripped by the tailstock 10a. In a work 5 having a structure in which the moment of inertia is large, such as a rotor of a motor, when the work 5 is machined by holding the rotation axis of the work 5 once with a support pin 79 and then holding the work 5 with a chuck 71. It is possible to suppress the runout of.

The configuration of the switchgear 20 that controls the chuck 71 via the draw bar 15 is the same as that of the switchgear 20 shown in FIG. That is, the switchgear 20 can rotate the piston 35 with respect to the actuator 30 in which the piston 35 transmitting the force in both directions X in the front-rear direction moves to the front-rear X in the direction of the central axis 9 with respect to the draw bar 15, and the draw bar 15. Has a bearing assembly 50 connected to. The bearing assembly 50 includes a thrust type first bearing unit 51 arranged on the front side 9a of the piston 35 and a radial type second bearing unit 52 arranged on the rear side 9b of the piston 35. The first bearing unit 51 includes a bearing set (angular bearing) 55 in a three-row combination. The bearing set 55 receives the axial load of the front side (push side) 9a from the front side 9a, the first angular bearing 56 that receives the axial load of the front side (push side) 9a, and the axial load of the front side (push side) 9a in the closing direction in which the chuck 71 grips the work 5. It includes a second angular bearing 57 to receive and a third angular bearing 58 to receive the axial load of the rear (pull side) 9b.

In the switchgear 20, when the actuator 30 moves the draw bar 15 rearward (opening direction, open side) 9b via the piston 35 and the bearing assembly 50, the chuck 71 opens to release the work, and the actuator 30 moves the piston 35 and the bearing assembly 50. When the draw bar 15 is moved forward (closed direction, supporting direction, gripping direction) 9a via the 50, the chuck 71 closes and the work is gripped.

1 Processing equipment, 10 Support equipment, 20 Switchgear (push-pull equipment)
35 piston, 50 bearing assembly

Claims (7)

A push-pull device that controls the opening and support of a work support mechanism provided on the front side of the main shaft by moving a draw bar that rotates with the main shaft back and forth in the direction of the central axis of the main shaft.
An actuator in which a piston that transmits force in both front and rear directions moves back and forth in the central axis direction with respect to the draw bar.
It has a bearing assembly that rotatably connects the piston to the drawbar.
The bearing assembly is a thrust type first bearing unit arranged on the front side of the piston, the first bearing unit including at least three rows of angular bearings, and the rear side of the piston. A push-pull device, including a radial type second bearing unit. In claim 1,
The first bearing unit includes a first angular bearing that receives an axial load on the front side, a second angular bearing that receives an axial load in the support direction of the work support mechanism, and a third angular bearing that receives an axial load on the rear side. Push-pull device, including angular bearings. In claim 1 or 2,
The rearmost angular bearing of the first bearing unit is a push-pull device located approximately in the center of the piston. In any one of claims 1 to 3,
It has an air supply unit that supplies air for driving the piston to the actuator.
The air supply unit is a push-pull device including an air tank for power failure countermeasures attached to each push-pull device. The push-pull device according to any one of claims 1 to 4,
With a drawbar to which the push-pull device is connected to one end,
The work support mechanism controlled by the drawbar and
A work support device having a motor that drives the spindle to rotate. In claim 5,
The work support mechanism is a collet chuck, which is a work support device. The work support device according to claim 5 or 6,
A processing apparatus having a processing unit for processing a work supported by the work support mechanism.

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