JP2003175434A - Swivel type pickup chuck apparatus in automatic loader - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable application to a small-sized NC finishing machine by minimizing the swivel radius of a loader chuck and an unloader chuck and mounting pushers for directly detecting the presence or absence of a workpiece on each of them. <P>SOLUTION: A swivel type pickup chuck apparatus assembled in an auto loader includes a swivel cylinder 6 mounted on a conveyance rod 4 through a bracket 5, a swivel shaft 7 swivelably mounted on the swivel cylinder 6, the loader chuck 1 mounted on the swivel shaft 7, and the unloader chuck 2 mounted on the swivel shaft 7. The axially moving directions of the pushers 8 mounted on the loader chuck 1 and the unloader chuck 2 are set offset and orthogonal to each other. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a swivel type pickup chuck device in an autoloader for transferring a work between a spindle and a pallet.

[0002]

2. Description of the Related Art Conventionally, there is known a pickup chuck device in an autoloader as shown in FIG. 7 (see, for example, Japanese Patent Laid-Open No. 8-155773). 7A is a front view of the pickup chuck device, and FIG. 7B is a side view of the pickup chuck device. In the pickup chuck device, a loader chuck 31 that delivers the work 33 to the main shaft and an unloader chuck 32 that pulls the work 33 from the main shaft are arranged in the upper and lower longitudinal directions of the support body 30. Further, the loader chuck 31 arranged above the support 30 and the unloader chuck 32 arranged below the support are structurally the same, and are distinguished from each other only from a functional point of view.

The pickup chuck device includes a support 30.
The loader chuck 31 and the unloader chuck 32 attached to the two are provided with two or three chuck claws 34 arranged at equal intervals on the circumference and pushers 35 arranged at equal intervals between the chuck claws 34. Have Chuck claw 34
Are movable in the radial direction, and the diameters of the chuck claws 34 are increased when the chuck claws 34 are separated from each other in the radial direction, and are reduced when the chuck claws 34 are approached in the radial direction. The chuck claw 34 has a gripping surface formed inside the tip, and is formed in a shape suitable for gripping the outer diameter surface of the work 33. The pusher shaft 37 to which the pusher 35 is attached is reciprocally attached to the pusher plate 36. The pusher shaft 37 is biased in a direction in which the pusher 35 is pushed out by a spring 38 arranged on the pusher plate 36.

The support 30 has a limit switch 39 for detecting the axial position of the pusher shaft 37 of the loader chuck 31 and a limit switch 40 for detecting the axial position of the pusher shaft 37 of the unloader chuck 32.
Is provided. The limit switch 39 is a switch for detecting the delivery of the work 33 to the chuck body of the headstock, and the limit switch 40 is a switch for detecting the removal of the work 33 from the spindle. These limit switches 39, 40
Are arranged on the back side of the support 30 and are covered with a cover 41.

The loader chuck 31 is operated to operate the work 3
3 is transferred from the loader chuck 31 to the spindle,
While aligning the central axis of the loader chuck 31 (this central axis is also the central axis of the pusher shaft 37) with the spindle rotation axis, the chuck claw of the spindle is inserted into the central hole of the work 33, while the chuck of the loader chuck 31 is chucked. The diameter of the claw 34 is expanded. At this time, the pusher 35 pushes the work 33 toward the reference plane in the longitudinal direction by the action of the spring 38. Since the rear end surface of the work 33 is pressed against the reference plane in the longitudinal direction, the work 33 is set correctly. At this time, the limit switch 39 detects the delivery of the work 33. On the contrary, when the unloader chuck 32 pulls the work 33 from the main shaft, the central axis of the unloader chuck 32 (this central axis is also the central axis of the pusher shaft 37) and the main shaft rotation axis are aligned, and the chuck jaws of the unloader chuck 32 are aligned. 34 is expanded and the unloader chuck 3
Move 2 closer to the spindle. Next, the work 33 held by the main shaft resists the force of the spring 38 and pusher 35
Will be pushed. At this time, the buffering action of the spring 38 prevents an unreasonable force from acting on the work 33. When the pusher 35 is pushed in, the limit switch 40 detects the take-up of the work 33. The chuck claw 34 of the unloader chuck 32 has a reduced diameter, and the work 33
Hold the outer diameter surface of.

Further, a rotary pickup chuck device in an autoloader as shown in FIG. 8 is known.
In the swivel type pickup chuck device, a loader 51 that delivers a work 53 to a main shaft and an unloader 52 that picks up the work 53 from the main shaft are mounted orthogonal to a swivel shaft 60 that is swivelably provided on a support rod 50. .

In the swivel type pickup chuck device, a loader chuck 51 and an unloader chuck 52, which are attached to a support rod 50 via a swivel device, have two or three chuck claws 54 arranged at equal intervals on the circumference. And the pushers 55 arranged at equal intervals between the chuck claws 54. The chuck claws 54 are movable in the radial direction, and the chuck claws 54 expand in diameter when they are separated in the radial direction, and contract in diameter when they approach each other in the radial direction.
The chuck claw 54 has a gripping surface formed inside the tip, and is formed in a shape suitable for gripping the outer diameter surface of the work 53.

The swing device provided on the support rod 50 is
It is composed of a turning cylinder 59 attached to a bracket 58 fixed to the support rod 50, and a turning shaft 60 that turns in the turning cylinder 59. The loader chuck 51 and the unloader chuck 5 are attached to the tip of the rotary shaft 60.
2 and 2 are attached respectively. Further, the loader chuck 51 is operated to move the work 53 to the loader chuck 51.
When transferring from the loader chuck 5 to the spindle, the center axis of the loader chuck 51 and the spindle rotation axis are aligned with each other, and the chuck claws of the spindle are inserted into the center hole of the work 53 while the loader chuck 5 is loaded.
The diameter of the chuck claw 54 of No. 1 is expanded. The buffering action of the spring prevents an unreasonable force from acting on the work 53. The chuck claw 54 of the unloader chuck 52 contracts to grip the outer diameter surface of the work 53.

[0009]

However, the pickup chuck device shown in FIG.
Since the unloader chuck 32 and the unloader chuck 32 are vertically arranged on the support 30, the autoloader conveys the work 33 set on the pallet in the pallet changer to the spindle, or conveys the work 33 from the spindle to the pallet by the autoloader. At times, for example, when passing the processing tank between the spindle and the pallet, the support 30 has to be largely moved in the vertical direction, and when the passage opening of the processing tank is small, the processing tank is small. When passing through such a passage opening, there arises a problem that the support body 30 itself must be refracted at the boundary between the loader chuck 31 and the unloader chuck 32 to be smaller in the vertical direction. In addition, the pickup chuck device requires a required swivel area indicated by diagonal line S2 when the positions of the loader chuck 31 and the unloader chuck 32 are switched to face the spindle or pallet when the transfer device of the autoloader is operated. .

Further, in the swivel type pickup chuck device shown in FIG. 8, since the loader chuck 51 and the unloader chuck 52 are directly attached orthogonally to the swivel shaft 60, the loader chuck 51 and the unloader chuck 52 are arranged in the longitudinal direction. The length directly extends from the tip end surface of the swivel shaft 60, and when the transfer device of the autoloader is operated, when the positions of the loader chuck 51 and the unloader chuck 52 are exchanged to face the spindle or pallet,
There is a problem that the required swiveling area becomes large as indicated by reference numeral S3. Moreover, as shown in FIG. 8, in the swivel pickup chuck device, when the loader chuck 51 and the unloader chuck 52 are directly attached to the swivel shaft 60, the work pieces are attached to the loader chuck 51 and the unloader chuck 52. It is not possible to provide a pusher for detecting the presence or absence of Therefore, in the above-mentioned swivel type pickup chuck device, if a pusher for detecting the presence or absence of the work 53 is not provided, it is necessary to provide a detecting means for indirectly detecting the presence or absence of the work 53.

Further, in the swing type pickup chuck device as shown in FIG. 8, when the loader chuck 51 and the unloader chuck 52 are provided with pushers for detecting the presence or absence of the work, the pushers are moved in the axial direction relative to each other. In order to prevent interference, the length of the pusher in the longitudinal direction is added to the loader chuck 51 and the unloader chuck 52, so that the loader chuck 51 and the unloader chuck 52 can move in the axial direction. Since the size in the longitudinal direction must be extremely large, the turning radius becomes large, which makes it difficult to incorporate it into a small NC processing machine, and the apparatus itself becomes large.

[0012]

SUMMARY OF THE INVENTION An object of the present invention is to reduce the turning radius when exchanging the positions of both chucks by simply arranging the loader chuck and the unloader chuck so as to be orthogonal to each other and shift them to a small NC machining. The machine enables swivel to adapt to downsizing, and the presence or absence of the work held by the loader chuck and the unloader chuck can be directly detected by the pushers provided on the loader chuck and troubles in the automated system. It is an object of the present invention to provide a swivel type pickup chuck device that prevents the occurrence of

According to the present invention, between a main shaft for gripping and rotating the work for cutting the work, an unprocessed work pallet in which an unprocessed work is set, and a processed work pallet in which a processed work is set. In an autoloader having a loader transfer device for reciprocating, a turning cylinder fixed to a bracket provided on a transfer rod of the loader transfer device, a turning shaft rotatably attached to the turning cylinder, and the turning A loader chuck mounted on a shaft and supplying the unprocessed work from the unprocessed work pallet to the spindle, and an unloader mounted on the swivel shaft and supplying the processed work from the spindle to the processed work pallet. A chuck, and is used as the loader chuck and the unloader chuck. Re about pivot pickup chuck device, wherein a moving direction of the axial direction of the Re provided pusher each are orthogonally and offset to set each other.

The loader chuck and the unloader chuck are fixed to the tip of the turning shaft via a shear plate.

The loader chuck and the unloader chuck have a material handling chuck provided with a support body fixed to the shear plate and having chuck claws for holding the work, and a support which is inserted through a center of the material handling chuck. Pusher shafts, which are movably supported on the body via springs and have the pushers fixed to the respective ends, are provided.

At the other end of the pusher shaft, a proximity switch for confirming the presence or absence of the work is provided.

An X-axis adjuster, a Z-axis adjuster and a Y-axis rotation angle adjuster are interposed between the carrying rod and the bracket.

When the loader transport device is moved to the spindle, the controller swivels the swivel shaft so that the unloader chuck faces the spindle and receives the processed work on the spindle, and then further swivels. Control is performed by rotating the shaft so that the loader chuck faces the main shaft and setting the unprocessed work on the main shaft.

Further, the controller sets the machined work of the unloader chuck to a predetermined position of the machined work pallet by rotating the revolving shaft when moving the loader transfer device to the machined work pallet. Then, the loader transport device is further moved to the unworked work pallet and the swivel shaft is swung to face the loader chuck to the unworked work pallet so that the unworked work pallet is unworked. Performs control to receive the processed work.

This swivel type pickup chuck device is
As described above, by offsetting the pusher shaft axes of the loader chuck and the unloader chuck at right angles to each other, the pushers for detecting the presence or absence of the work are respectively attached to the loader chuck and the unloader chuck using the space of the chuck center bracket. The presence or absence of the work can be detected by each pusher, and the pusher shaft with the pusher can be fixed to the swivel shaft without interfering with each other in the axial reciprocating movement. It is possible to configure the turning radius of and to be small. In addition, the X-axis adjuster and Z
By providing the loader chuck and the unloader chuck with the shaft adjuster, the position adjustment and the centering adjustment can be easily performed, and the loader chuck and the unloader chuck can be positioned with high accuracy on the chuck body of the spindle or the pallet changer. You can

[0021]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a rotary pickup chuck device according to the present invention will be described below with reference to the drawings.

This swivel type pickup chuck device is
Although not shown, an autoloader having a loader transfer device that reciprocates between a spindle that holds and rotates the work 3 for cutting the work 3 with a cutting tool and a pallet assembly that transfers the work 3 (not shown). No.) is preferable. Generally, a pallet assembly is set on an NC processing machine by a transfer device or a pallet changer, but a pallet for an unprocessed work in which an unprocessed work 3A is set and a pallet for a processed work in which a processed work 3B is set. It consists of and.

This swivel type pickup chuck device is
Mainly, a swing cylinder 6 fixed to a bracket 5 provided on a transport rod 4 of a loader transport device, a swing shaft 7 swingably attached to the swing cylinder 6, a swing shaft 7 mounted on a swing shaft 7 and for unworked workpieces. It has a loader chuck 1 for supplying an unmachined work 3A from a pallet to a spindle, and an unloader chuck 2 which is attached to a turning shaft 7 and supplies a machined work 3B from the spindle to a pallet for a machined work. The loader chuck 1 and the unloader chuck 2 are fixed to the tip end of the turning shaft 7. In addition, between the transport rod 4 and the bracket 5,
An X-axis adjuster 16, a Z-axis adjuster 17, and a Y-axis rotation angle adjuster 21 are interposed so that the loader chuck 1 and the unloader chuck 2 can be adjusted to proper positions.

This swivel type pickup chuck device is
In particular, the pusher shafts 14 provided at the tips of the loader chuck 1 and the unloader chuck 2, respectively, are moved in the axial direction at right angles to each other, that is, the pusher shafts 14 are displaced in the longitudinal direction, and the axial direction of the pusher shaft 14 is changed laterally. The feature is that it is set to be offset in the direction. Since the pusher shafts 14 provided on the loader chuck 1 and the unloader chuck 2 are offset orthogonally to each other, the movement directions of the pusher shafts 14 are offset and arranged in an overlapping state. Therefore, in this swivel type pickup chuck device, when the position of the loader chuck 1 and the unloader chuck 2 is exchanged so as to face the spindle or the pallet when the transport device of the autoloader is operated, the swivel required area is the same as in FIG. As shown by S1, it can be made small and can be incorporated in a small NC processing machine. Moreover, this swivel type pickup chuck device includes a loader chuck 1 and an unloader chuck 2
Since the pushers 8 of 1 and 2 are incorporated, it is possible to directly detect the presence or absence of the work 3 gripped by the loader chuck 1 and the unloader chuck 2.

The loader chuck 1 and the unloader chuck 2 have shear plates 9 as shown in FIGS.
A material handling chuck 12 having chuck claws 11 for gripping a work 3 attached to a support body 10 fixed to
Also, the support 10 is inserted through the center of the material handling chuck 12.
A pusher shaft 1 which is reciprocally supported via a spring 13 and has a pusher 8 fixed to one end thereof.
Each has four. At the other end of the pusher shaft 14, a proximity switch 15 for confirming the presence or absence of the work 3 on the material handling chuck 12, that is, the presence or absence of the work 3, is provided. Wirings denoted by reference numerals 20 and 19 in FIGS. 2 and 5 are, for example, wirings 2 connected to a power supply for turning the turning shaft 7.
A wiring 19 for inputting 0 and the detection signal of the proximity switch 15 to the controller.

The controller of the NC processing machine rotates the swivel shaft 7 so that the unloader chuck 2 faces the main shaft when the swivel pickup chuck device is moved to the main shaft by the loader transfer device, and receives the processed work 3B of the main shaft. Then, the turning shaft 7 is turned to make the loader chuck 1 face the main shaft and the unworked workpiece 3A is set on the main shaft. In addition, the controller of the NC processing machine rotates the swivel shaft 7 to move the processed work 3B of the unloader chuck 2 to the processed work pallet when the swivel pickup chuck device is moved to the processed work pallet by the loader transfer device. The pallet for the unworked work is set to a predetermined position, the loader transport device is moved to the pallet for the unworked work, and the turning shaft 7 is swung to face the loader chuck 1 to the pallet for the unworked work so that the pallet for the unworked work is not moved. Processing work 3
It is configured to perform control for receiving A.

Here, an outline of an NC processing machine for cutting the work 3 will be described. The chuck body is mounted on a spindle rotatably mounted on a headstock and rotates together with the rotation of the spindle. The chuck body has, for example, three chuck claws on the front surface, and the work 3 is gripped by the chuck claws. The work 3 has, for example, a ring-shaped thin plate work or the like, and has a central hole or the like penetrating the center thereof. By subjecting the work 3 to cutting, for example, a hard disk spacer is manufactured. It The spacer is required to have a high degree of parallelism on both end faces. When the work 3 is cut by the NC processing machine, the work 3 is chucked by inserting the chuck claws into the center hole of the work 3 and opening the three chuck claws radially outward, that is, by expanding the diameter. Is gripped by.

Next, with reference to FIGS. 3 to 5, the swivel pickup chuck device provided in the autoloader will be described. The swivel type pickup chuck device has a loader chuck 1 that delivers a work 3 to a chuck body of an NC processing machine and an unloader chuck 2 that picks up the work 3 from the chuck body. The loader chuck 1 and the unloader chuck 2 are structurally structured. Have the same configuration, and are simply distinguished in this way from a functional point of view.

The autoloader is constructed to be movable relative to a base provided with a pallet and a chuck body of an NC processing machine. The swivel pickup chuck device in the autoloader includes a bracket 5 fixed to the transport rod 4, a swivel cylinder 6 attached to the bracket 5, a swivel shaft 7 swivelly attached to the swivel cylinder 6, and a swivel shaft 7. Shear plate 9 at the tip
It has a loader chuck 1 and an unloader chuck 2 which are attached via. As shown in FIG. 4, the loader chuck 1 and the unloader chuck 2 include three chuck claws 11 arranged at equal intervals on the circumference and each chuck claw 1
1 has pushers 8 arranged at equal intervals.
The chuck claws 11 are movable in the radial direction, and the diameters of the chuck claws 11 are expanded by separating the chuck claws 11 in the radial direction.
The diameter is reduced by approaching in the radial direction. The inside of the tip of the chuck claw 11 is, for example, formed into a circular arc surface and has a shape suitable for gripping the outer diameter surface of the annular work 3.

The pusher 8 is attached to a support body 10 which constitutes a pusher plate, and a pusher shaft 14 is reciprocally attached to the center of the support body 10.
The pusher shaft 14 is supported so as to be slidable in the axial direction with respect to the support body 10, and is biased by a spring 13 in a direction in which the pusher 8 is pushed out. In the support 10,
A proximity switch 15 for detecting the axial position of the pressure shaft 14 of the loader chuck 1 and a proximity switch 15 for detecting the axial position of the pressure shaft 14 of the unloader chuck 2 are provided. The proximity switch 15 of the loader chuck 1 connects the work piece 3 to the chuck body of the headstock.
It is a switch for detecting the delivery. The proximity switch 15 of the unloader chuck 2 is a switch that detects that the work 3 is pulled from the chuck body 1 of the headstock. The proximity switch 15 is arranged on the back surface side of the support body 10 and is covered with a cover 18. Further, the pressing device that operates to transfer the work 3 is constituted by the pusher 8, the pusher plate support 10, the pusher shaft 14, the spring 13, and the like.

The loader chuck 1 is operated, and the work 3
When the (unprocessed work 3A) is transferred from the loader chuck 1 to the chuck body of the NC processing machine, the central axis of the loader chuck (this central axis is also the central axis of the pressure shaft 14) and the rotation axis of the main shaft are aligned. The chuck claw of the chuck body is inserted into the center hole of the work 3, and the chuck claw 11 of the loader chuck 1 is expanded in diameter. At this time, the pusher 8 pushes the work 3 toward the reference plane in the longitudinal direction by the action of the spring 13. Then, since the rear end surface of the work 3 is pressed against the reference surface in the longitudinal direction, the work 3 is set correctly. Further, the proximity switch 15 detects the delivery of the work 3.

On the contrary, when the unloader chuck 2 picks up the work 3 (worked work 3B) from the chuck main body of the NC processing machine, the unloader chuck 2 has a central axis (this central axis is also the central axis of the pressure shaft 14). The diameter of the chuck claw 11 of the unloader chuck 2 is made to coincide with the rotation axis of the main shaft, and the unloader chuck 2 is brought closer to the chuck body of the NC processing machine. At that time, the processed work 3B held by the chuck body pushes the pusher 8 against the force of the spring 13. At this time, the buffering action of the spring 13 prevents an unreasonable force from acting on the work 3. When the pusher 8 is pushed in,
The proximity switch 15 detects the take-up of the work 3. Then, the chuck claws 11 of the unloader chuck 2 are reduced in diameter to grip the outer diameter surface of the work 3.

[0033]

Since the swivel pickup chuck device according to the present invention is constructed as described above, the loader chuck and the unloader chuck can be arranged by offsetting the pusher shaft axes so that they are orthogonal to each other. The turning radius of the chuck and the unloader chuck can be made small, and in particular, by providing the loader chuck and the unloader chuck with pushers respectively,
The presence / absence of the work can be directly detected and confirmed, and troubles in the automated system can be prevented. Moreover, since the pusher shaft adjusting mechanism is attached, centering can be easily achieved and the weight of the device itself is achieved. Yes, it enables high speed movement. Also, since the turning radius of both chucks can be made small, it is possible to turn inside a small machine,
The cycle time can be shortened in an automated system, and processing efficiency can be greatly improved.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a rotary pickup chuck device according to the present invention.

2 is a side view of the swivel pickup chuck device of FIG. 1. FIG.

3 is a side view showing a loader chuck or an unloader chuck in the swivel type pickup chuck device of FIG. 1. FIG.

FIG. 4 is a front view of FIG.

FIG. 5 is a rear view of FIG.

6A and 6B are explanatory views showing a swivel area of the swivel type pickup chuck device according to the present invention, FIG. 6A being a front view thereof, and FIG. 6B being a side view.

FIG. 7 is an explanatory view showing a swivel area of a conventional pickup chuck device, (A) is a front view thereof, and (B) is a front view thereof.
Is a side view.

FIG. 8 is an explanatory diagram showing a swivel region of a conventional swivel-type pickup chuck device, and FIG. 8A is a front view thereof,
(B) is a side view.

[Explanation of symbols]

1 Loader chuck 2 Unloader chuck 3 work 3A Raw work 3B processed work 4 Conveyor rod 5 bracket 6 Turning cylinder 7 rotation axis 8 pushers 9 Shear plate 10 Support 11 chuck claws 12 Material handling chuck 13 spring 14 Pusher shaft 15 Proximity switch 16 X-axis adjuster 17 Z-axis adjuster 21 Y-axis rotation angle adjuster

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Claims (7)

[Claims] 1. A reciprocating spindle between a spindle for gripping and rotating the work for cutting the work, a pallet for an unprocessed work in which an unprocessed work is set, and a pallet for a processed work in which a processed work is set. In an autoloader having a loader transfer device for moving, a turning cylinder fixed to a bracket provided on a transfer rod of the loader transfer device, a turning shaft rotatably attached to the turning cylinder, and a turning shaft A loader chuck mounted and supplying the unprocessed work from the unprocessed work pallet to the spindle, and an unloader chuck mounted on the swivel shaft and supplying the processed work from the spindle to the processed work pallet. And provided on the loader chuck and the unloader chuck respectively A swivel type pickup chuck device in which the axial movement directions of the pushers are set to be orthogonal to each other and offset. 2. The swivel pickup chuck device according to claim 1, wherein the loader chuck and the unloader chuck are respectively fixed to the tip of the swivel shaft via a shear plate. 3. The loader chuck and the unloader chuck have a material handling chuck provided with a support body fixed to the shear plate and having chuck claws for gripping the work, and a material handling chuck inserted through the center of the material handling chuck. 3. The swivel type pickup chuck device according to claim 2, further comprising pusher shafts that are reciprocally supported by the support member via springs and have the pusher fixed to one end thereof. 4. The swivel type pickup chuck device according to claim 3, wherein a proximity switch for confirming the presence or absence of the work is provided at the other end of the pusher shaft. 5. The X-axis adjuster, the Z-axis adjuster, and the Y-axis rotation angle adjuster are interposed between the transport rod and the bracket. The swivel-type pickup chuck device described in 1. 6. A controller receives the processed workpiece of the main spindle by rotating the rotary shaft so that the unloader chuck faces the main spindle when the loader transfer device moves the main spindle to the main spindle. The swivel pickup according to any one of claims 1 to 5, wherein the swivel shaft is swung to make the loader chuck face the main shaft so that the unworked workpiece is set on the main shaft. Chuck device. 7. A controller sets the machined work of the unloader chuck to a predetermined position of the machined work pallet by rotating the revolving shaft when the controller transfers the machined work pallet to the machined work pallet. Then, the loader transfer device moves the raw work pallet to the raw work pallet, and the swivel shaft is swung to face the loader chuck to the raw work pallet so that the raw work pallet is unprocessed. The swivel type pickup chuck device according to any one of claims 1 to 6, wherein control is performed to receive the work.