JP2003334737A - Work delivery device - Google Patents

Abstract

(57) [Summary] [PROBLEMS] This work transfer device only moves a loader chuck and an unloader chuck in one vertical direction in a simplified manner, and installs a pallet stocker or mounting base above the machine body. Configure the entire device in a small space. In this work transfer device, a mounting base (6) on which a pallet (5) is installed is mounted on a cover structure (4) provided outside a headstock (3). An intermediate transfer device 7 having a rotating chuck 10 is provided on the mounting base 6.
Further, a pickup device 8 for transferring the work 1 between the pallet 5 and the turning chuck 10 is provided. The work supply device 9 including the loader chuck 13 and the unloader chuck 14 transfers the work 1 between the turning chuck 10 and the main spindle 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work transfer device for transferring a work set on a pallet between the pallet and a spindle of a headstock via various chuck devices.

[0002]

2. Description of the Related Art Conventionally, as a pallet transfer positioning method, there is one disclosed in Japanese Patent Laid-Open No. 2001-25937. The pallet transfer positioning method is a method of supplying a work on a pallet to a machine tool and transferring and positioning a plurality of pallets with respect to a work supply device for returning a product of a processing machine onto the pallet. Process for stacking pallets on the pallet table, step b for moving the pallet table to position the top pallet at a position corresponding to the work supply device, work supply device for the work on the top pallet The process is to sequentially supply the machine tool and to return the processed products in sequence c. After the supply of the work on the top pallet is completed, the pallet table is returned to its original position and the top pallet is lifted to move the pallet below it. Next, the d process to be the top pallet,
After the step d, the steps b to d are repeated to complete the processing of the workpieces on all the pallets stacked on the pallet table.

A chuck device in a gantry loader disclosed in Japanese Patent Laid-Open No. 8-155773 is also known. In the chuck device, a loader chuck for delivering a work to the main shaft and an unloader chuck for pulling the work from the main shaft are arranged in the upper and lower longitudinal directions of the support. Further, the loader chuck arranged above the support body and the unloader chuck arranged below the support body are structurally the same, and are distinguished in this way only from the functional point of view. In the chuck device, the loader chuck and the unloader chuck mounted on the support have three chuck claws arranged at equal intervals on the circumference and pushers arranged at equal intervals between the chuck claws. is doing. The chuck claws are generally movable in the radial direction, and the diameters of the chuck claws are expanded when the chuck claws are separated from each other in the radial direction, and the diameters are reduced when the chuck claws are approached in the radial direction. The chuck claw has a gripping surface formed inside the tip, and is formed in a shape suitable for gripping the outer diameter surface of the work. The pusher shaft with the pusher attached is reciprocally attached to the pusher plate. The pusher shaft is urged in a direction to push out the pusher by a spring arranged on the pusher plate. Further, the support body is provided with limit switches for detecting the axial position of the pusher shaft between the loader chuck and the unloader chuck. The limit switch detects that the workpiece has been delivered to the chuck body of the headstock.
Alternatively, it is a switch for detecting that the work is picked up from the spindle.

[0004]

However, in the pallet transfer positioning method disclosed in Japanese Unexamined Patent Publication No. 2000-25937, when the work supply device is uniaxially driven and the loading device is uniaxially driven. Is
It is necessary to use a loader chuck such as a turning method, and when a loader chuck such as a turning method is used, there is a problem that it takes time to center each drive shaft. Further, in the chuck device, a loader chuck and an unloader chuck are vertically arranged on a support body, and an autoloader conveys a work set on a pallet to a spindle, or moves the autoloader vertically, horizontally, or rotationally to move the pallet. The work set on the pallet on the changer must be moved largely by transporting it from the spindle to the pallet, or by passing the processing tank between the spindle and the pallet, and the passage opening of the processing tank, etc. When passing through, there arises a problem that the support itself must be refracted at the boundary between the loader chuck and the unloader chuck to make it smaller in the vertical direction. Further, the above chuck device is used when the positions of the loader chuck and the unloader chuck are exchanged so as to face the spindle or pallet when the transfer device of the autoloader is operated,
It requires a considerable area for turning.

Therefore, the present applicant has solved each of the above problems.
In order to make a decision, we have developed the following work supply method and
(Patent Application No. 2002-58331).
The work supply method is a pallet table equipped with a pallet.
Which moves the cable back and forth on only one axis in the A-axis direction
The engine and swivel chuck device are orthogonal to the A-axis direction.
Reciprocate in the B-axis direction and the direction perpendicular to the B-axis (Y-axis)
With a gantry loader
3 points of the placed work points are memorized, and 3 points of work
Each work position on the pallet based on points
Calculation for each work position
This data is automatically offset by the offset correction function.
The tray changer in the A-axis direction and the gantry.
-Move the loader in the B-axis direction
Work core for work position with loader chuck
Aligning reduces the centering time and improves positioning accuracy.
It was made.

However, in the work supply method as described above, in the NC lathe, when a work is continuously and automatically machined, a work stock device such as a pallet changer is placed around the machine, and then a gantry loader is used. The so-called transfer device is configured to transfer the work. The work carried out from the work stocker is delivered to the chuck of the machine in the machine side machining room. On this occasion,
The machine side chuck only opens and closes the chuck jaws, and the gantry loader side inserts the work into the chuck. In the above-mentioned work supply method, generally, a gantry loader called a 2-axis type or a 3-axis type and an articulated robot are mainly used as a transfer device in many cases. Is being inserted and ejected. For example, in the conventional work supply method,
The work stock equipment such as pallet changer is laid out separately from the machine body, and the work discharged from the machine is transported to the stocker position for a long distance, and it takes a long time to transfer the work between chucks. It was Also, when the Y-axis of the gantry loader comes to the A-axis position, a moment corresponding to the load of the Y-axis is applied to the B-axis side, and the moment load is applied to the machine body base. It is not preferable. Moreover, in the conventional type work supply method, the work is delivered by the B-axis, but the positioning accuracy of the B-axis is inferior to that of the drive shaft of the machine body. In addition, the machine installation space requires a large space for both the machine body and the pallet changer adjacent to the machine body, which is a large space, and the number of drive axes of the entire machine is the same as that of the X-axis and Z-axis in the machine body. Two axes and two axes of gantry were required for a total of four axes.

[0007]

SUMMARY OF THE INVENTION An object of the present invention is to provide a stocker device for mounting a pallet on which a work is set, that is, a mounting base, to a machine body while preventing transmission of vibration between the machine body and the pallet. It is placed on the cover structure extended to the upper position to configure the entire device in a small space. Also, the conventional B-axis is eliminated, and the work pallet and the spindle are handed over. The movement of each chuck device is simplified by dividing the movement of each of the pick-up device and the intermediate delivery device provided and the work supply device, and the overlapping movements are made possible to reduce the total movement time of the movements of each chuck device. In particular, it is possible to shorten the operation time by shortening the operation time of the work supply device, in particular, by configuring the work supply device to operate in the vertical single-axis drive. To provide a workpiece transfer device.

According to the present invention, a headstock for rotatably supporting a spindle on which a work is mounted, a cover structure provided outside a machine body having the headstock, and a cover structure located above the headstock. A mounting base mounted on the cover structure and on which a pallet on which the work is set is installed, an intermediate delivery device including a swing chuck provided on the mounting base, the pallet and the swing chuck provided on the mounting base And a work supply device including a loader chuck and a unloader chuck for transferring the work between the revolving chuck and the main body chuck of the spindle. Regarding the delivery device.

The spindle stock rotatably supports the spindle for machining the workpiece, and transfers the workpiece to a transfer area and a standby area between the spindle and the loader chuck or the unloader chuck. The main shaft is supported so as to be linearly movable in order to move the work to the processing area.

The pickup device planarly moves the pickup chuck between a work support at a predetermined position on the pallet to which the predetermined work is delivered and the swivel chuck, and at the same time, the work. The pickup chuck is moved up and down with respect to the work support tool or the swivel chuck in order to deliver the above.

The intermediate delivery device swivels the swivel chuck to face the swivel chuck to the pickup chuck, swivels the swivel chuck to face the swivel chuck to the loader chuck or the unloader chuck, and The swing chuck is linearly moved to transfer the work to the loader chuck or the unloader chuck.

The work supply device vertically moves the loader chuck and the unloader chuck so as to face the swing chuck or the spindle.

The pickup device includes a left-right axis installed on the mounting base and extending in the left-right direction, a front-rear axis movable in the left-right direction along the left-right axis, and a right-angled direction extending in the left-right direction along the front-rear axis. The pickup chuck includes a vertical shaft movable in the front-rear direction and a downward chuck claw movable in the vertical direction along the vertical shaft.

The intermediate transfer device may be configured such that the swivel chuck of the intermediate transfer device is disposed so as to face the pickup chuck located at an end of the left and right shafts and the loader chuck or the unloader chuck of the work supply device. It comprises a turning device for turning and a linear movement device for moving the turning device in the left-right direction.

The swivel device for swiveling the swivel chuck in the intermediate transfer device is composed of a swivel cylinder for swiveling the swivel chuck upward and sideways, and the linear moving device opposes the swivel chuck to the pickup chuck. And a linear movement cylinder that moves the loader chuck or a position facing the unloader chuck.

The work supply device has a vertical movement device for vertically moving a chuck support device, to which the loader chuck and the unloader chuck are attached, between the main body chuck of the spindle and the swing chuck.

At least a pair of the pallets are placed on the mounting base, and the pallets on the mounting base are exchangeably placed.

The pallet on the mounting base is mounted on a slide table provided on the mounting base,
In addition, the slide base has an installation position set for transferring the work by the pickup chuck,
The work is set on or removed from a work support provided on the pallet, or the pallet is slid between the slide table and a setup position for mounting or removing the pallet for replacement of the pallet. It is configured to be possible.

The mounting base is provided with a positioning reference pin which determines an installation position set on a slide table on which a pallet is placed for transferring the work by the pickup chuck.

The pickup chuck, the swing chuck, the loader chuck and the unloader chuck are delivery confirmation sensors for confirming the presence or absence of the work,
A chuck claw for gripping the work and a pusher for pushing the work out of the chuck claw are respectively provided.

This work transfer device is constructed as described above, and the loader chuck and the unloader chuck of the work supply device are simple reciprocating movements of only one axis drive in the vertical direction, and the pallet is mounted. Since the base is installed above the machine body, the space of the entire device is reduced to about half, and the movement distance for transporting the work is shortened by the small space, especially between the pallet and the spindle. Pick-up device for moving work of
The chuck is divided into three chuck devices, an intermediate transfer device and a work supply device, so that the movement of each device can be duplicated, and the movement of each chuck can be simplified to ensure reliable movement and delivery. The total time required to transfer the work to and from the chuck device can be overlapped and shortened, which improves the processing efficiency and the device itself is compact so that the cost can be reduced and the pallet can be mounted. Since the installed mounting base is built into the machine body, their alignment is unnecessary and handling is simplified.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a work transfer device according to the present invention will be described below with reference to the drawings. The work transfer device according to the present invention is provided in an NC machine 49 for processing the work 1 into a predetermined shape. The pallet 5 is provided with a large number of work supports 38 for setting the work 1 to be processed by the NC machine 49 at a predetermined position. This work transfer device is provided separately on the outside of a machine main body, that is, a bed 35 mainly including a headstock 3 and a headstock 3 that rotatably supports a spindle 2 that rotatably supports the work 1 for processing the work 1. Mounting cover 6, which is mounted on the cover structure 4 so as to be located above the bed 35 having the cover structure 4 and the headstock 3, and which constitutes the stocker for mounting the pallet 5 on which the work 1 is set. An intermediate transfer device 7 provided with a swivel chuck 10 installed at an end of the base 6, and a pickup device provided with a mounting base 6 and provided with a pickup chuck 11 for delivering a work 1 between the pallet 5 and the swivel chuck 10. 8, and the workpiece 1 is received between the swing chuck 10 and the main body chuck 12 of the main shaft 2 (having the chuck claw 18 in the embodiment). And a work supply device 9 and a loader chuck 13 and the unloader chuck 14 to pass. Further, the cover structure 4 is provided with a cover 36 for surrounding the pallet 5 set on the mounting base 6.

NC in which this work transfer device is incorporated
In the machine 49, since the headstock 3 processes the work piece 1,
A spindle 2 rotatably driven by a drive motor 33 and the like is rotatably supported by a spindle stock 3, and a delivery area and a standby area for the workpiece 1 between the spindle 2 and the loader chuck 13 or the unloader chuck 14 are provided. The main spindle 2 is supported so as to be linearly movable so as to move to the machining area 26. Further, the pickup device 8 picks up between a large number of work supports 38 provided at predetermined positions on the pallet 5 to which a predetermined work 1 is delivered and the swivel chuck 10 of the intermediate delivery device 7. The chuck 11 is moved in a plane, and the pickup chuck 11 is moved up and down with respect to the work support 38 or the swivel chuck 10 for delivering the work 1.

The intermediate transfer device 7 swivels the swivel chuck 10 about the swivel shaft 32 in order to make the swivel chuck 10 face the pickup chuck 11, and makes the swivel chuck 10 face the loader chuck 13 or the unloader chuck 14. The swivel chuck 10 is swung, and the swivel chuck 10 is linearly moved to transfer the work 1 to the loader chuck 13 or the unloader chuck 14. The work supply device 9 connects the loader chuck 13 and the unloader chuck 14 to the swing chuck 10
Alternatively, it is moved up and down to face the main shaft 2.

In this work transfer device, specifically, the pickup device 8 includes a left-right shaft 15 and a left-right shaft 15 extending in the left-right direction (that is, the Z-axis direction) when viewed from the front installed on the mounting base 6. Along the front-rear shaft 16 that is movable in the left-right direction, a vertical shaft 17 that is movable in the front-rear direction that is perpendicular to the left-right direction along the front-rear shaft 16 (that is, in the X-axis direction), and a vertical direction that moves along the vertical shaft 17 ( That is, the pickup chuck 11 is provided with a downwardly facing chuck claw 45 that is movable in the Y-axis direction.

The intermediate transfer device 7 includes a pickup chuck 11 which is movable in a transfer area 19 at the end of the left and right shafts 15.
And the intermediate transfer device 7 so as to face the loader chuck 13 or the unloader chuck 14 of the work supply device 9.
The swivel device 20 for swiveling the swivel chuck 10 and the linear moving device 21 for moving the swivel device 20 in the left-right direction. Further, the swivel device 20 that swivels the swivel chuck 10 includes a chuck claw 46 of the swivel chuck 10.
Is composed of a revolving cylinder 22 for revolving the revolving shaft 32 around the revolving shaft 32 at an angle of 90.degree. In addition, the linear moving device 21 includes a position where the swing chuck 10 faces the pickup chuck 11 and a position where the swing chuck 10 faces the pickup chuck 11.
Alternatively, it is composed of a linear movement cylinder 23 that is moved to a position facing the unloader chuck 14.

The work supply device 9 includes a loader chuck 13
44 to which the unloader chuck 14 and the unloader chuck 14 are attached
A chuck support device 24 for supporting the main body chuck 12 of the main shaft 2 and the revolving chuck 10,
It has a vertical movement device 25 for uniaxially moving up and down. Further, the headstock 3 rotatably supports the main spindle 2, and a machining position 26 for machining the work 1 held by a main body chuck 12 attached to the main spindle 2 with a cutting tool (not shown), a work supply device 9 Loader chuck 13
Alternatively, in order to move the spindle 2 to each position of the delivery position for delivering the work 1 to and from the unloader chuck 14 and the retracted position for waiting the delivery of the work 1,
Can be moved in the left-right direction (that is, the Z-axis direction).

At least one pallet 5 and a pair of pallets 5 in FIG. 6 are placed on the mounting base 6, and the pallets 5 on the mounting base 6 are exchangeably placed. In addition, in this work transfer device, the mounting base 6
The upper pallet 5 is configured to be mounted on the slide base 34 provided on the mounting base 6. The slide base 34 has an installation position 27 set for the transfer of the work 1 by the pickup chuck 11 and a pallet 5.
The workpiece 1 is set or removed, or the pallet 5 is mounted on or removed from the slide base 34 by sliding through a linear motion guide unit such as a rolling bearing between the setup position 28 to be attached or detached. It is configured to be movable.

Positioning reference pins 29 are provided on the mounting base 6 so that the pallet 5 can be reliably set on the slide table 34 (that is, the installation position 27) on which the pallet is placed for the transfer of the work 1 by the pickup chuck 11. Has been. Further, in this work transfer device, the pickup chuck 11, the swing chuck 10, the loader chuck 13
Further, the unloader chuck 14 receives the work 1 from the delivery confirmation sensor 30 for confirming whether the work 1 is held or not, the chuck claws 45, 46, 47, 48 holding the work 1 and the chuck claws 45, 46, 47, 48. Each pusher 31 for pushing out is provided.

Next, an embodiment of the operation of the work transfer device will be described with reference to the drawings. In other words, this work transfer device is not limited to the following operation steps, and the operation steps can be arranged in various ways and determined.
Of course, the operating process can be changed by inputting those operating processes into the controller.

In explaining the operation of the work transfer device, the left and right sides of the paper surface of FIG. 4 are the left and right directions (that is, the NC machine 49 corresponds to the Z-axis direction), and the direction orthogonal to the paper surface of FIG. That is, the NC machine 49 corresponds to the X-axis direction) and the vertical direction of the paper surface of FIG. 4 (that is, the NC machine 49 corresponds to the Y-axis direction). First, the work 1 to be processed by the NC machine 49 is set on the pallet 5, and the slide table 34 for placing the pallet is pulled out to the setup position 28 to mount the pallet 5 on the slide table 34. The slide base 34 is pushed from the setup position 28 to the installation position 27 and installed at a predetermined position of the mounting base 6, that is, the installation position 27. At this time, one or a pair of pallets 5 are installed on the mounting base 6.

A. Passing process of the work 1 between the work 1 on the pallet 5 and the pickup chuck 11: First, the pickup device 8 is instructed by the controller.
The pickup chuck 11 moves to the position of the first work 1 set on the pallet 5. The movement of the pickup chuck 11 to the work 1 is performed by moving the front-rear shaft 16 in the left-right direction along the left-right shaft 15.
The vertical shaft 17 moves in the front-back direction along the front-back shaft 16.
When the vertical shaft 17 is located above the predetermined work 1, the pickup chuck 11 descends along the vertical shaft 17.
Since the chuck jaws 45 of the pickup chuck 11 are always open downward, when the pickup chuck 11 descends to a predetermined predetermined work piece 1, the chuck jaws 45 of the pickup chuck 11 holds the predetermined work piece 1 in place. Can be gripped. With the pickup chuck 11 gripping the work 1, the pickup chuck 11 is raised along the vertical shaft 17, and then the front and rear shaft 16 is moved along the left and right shaft 15 to the right side of the mounting base 6, and the front and rear shaft 16 is moved. Along the vertical axis 1
7 is moved backward to move the pickup chuck 11 to the delivery position 19 at the right end, and the pickup chuck 11 is stopped at a position above the swivel chuck 10 of the intermediate delivery device 7.

B. Delivery process of the work 1 between the pickup chuck 11 and the intermediate delivery chuck 7: chuck jaws 46 of the swivel chuck 10 provided in the intermediate delivery device 7.
Is opened upward by driving the turning device 20. Therefore, with the pickup chuck 11 positioned above the swivel chuck 10, the pickup chuck 11 is lowered along the vertical axis 17 to move the work 1 gripped by the chuck claws 45 of the pickup chuck 11 to the swivel chuck 10. Hand it over to the chuck claw 46. In the swivel chuck 10 to which the work 1 is transferred, the swivel cylinder 22 attached to the support body 40 is actuated, the swivel chuck 10 is swung 90 °, and the chuck claws 46 are directed toward the work supply device 9 side in the lateral direction. It becomes a standby state. Next, when the loader chuck 13 provided in the work supply device 9 moves up to a position facing the swivel chuck 10, the swivel chuck 10 is attached to the support body 40 fixed to the slider 42. In the support body 40, the plunger 39 is extended by the operation of the linear movement cylinder 23, and the slider 42 is attached to the base 43 on the mounting base 6.
The work 1 linearly moved to the right along the guide rail 41 fixed to the work 1 and held by the chuck claws 46 of the turning chuck 10 faces the chuck claws 47 of the loader chuck 13, and the work 1 can be delivered. .

C. Intermediate transfer device 7 and work supply device 9
Process of delivering work 1 between and: The chuck claw 47 of the loader chuck 13 and the chuck claw 48 of the unloader chuck 14 in the work supply device 9 are the swivel chuck 10.
It is installed so that it can always be opened laterally on the side. Therefore, when the chuck claws 47 of the loader chuck 13 stand by while the chuck claws 46 of the swivel chuck 10 hold the work 1 and open, the chuck claws 46 of the swivel chuck 10 face the chuck claws 46 of the swivel chuck 10 and stand by. As described above, the chuck claws 46 of the swivel chuck 10 are linearly moved in the direction of the chuck claws 47 of the loader chuck 13 by the operation of the linear movement cylinder 23, and the workpiece 1 gripped by the chuck claws 46 of the swivel chuck 10 is , To the chuck claw 47 of the loader chuck 13. Further, in the first delivery process of the first work 1, the work 1 has not been processed yet, so the chuck jaws 4 of the unloader chuck 14 are
Although the machined work 1 is not gripped by 8, the work 1 machined by the NC machine 49 is gripped by the chuck claw 48 of the unloader chuck 14 in the second delivery process of the work 1. Then, when the unworked work 1 is passed to the chuck claw 47 of the loader chuck 13, the chuck claw 46 of the swivel chuck 10 is retracted and the work supply device 9 is raised, so that the unloader chuck 1 is moved.
The chuck claw 48 of 4 is the chuck claw 4 of the swivel chuck 10.
6, when the chuck claw 46 of the swivel chuck 10 advances again, the chuck claw 46 of the swivel chuck 10 moves the machined work 1 to the unloader chuck 1
4 from the chuck claw 48.

D. Process of delivering the work 1 between the work supply device 9 and the spindle 2. The unprocessed work 1 is gripped by the chuck claw 47 of the loader chuck 13 of the work supply device 9, and the chuck claw 48 of the unloader chuck 14 is held.
The workpiece 1 is in an empty state where it is not gripped. Therefore, the work supply device 9 descends and stops at the position where the chuck claw 47 of the loader chuck 13 faces the main body chuck 12 of the spindle 2 in the first work 1 delivery process, but In the delivery process, the chuck claw 48 of the unloader chuck 14 stops at a position facing the main body chuck 12 of the spindle 2. When the machined workpiece 1 is present on the main body chuck 12 of the main spindle 2, the main spindle 2 extends from the headstock 3 to the delivery position indicated by the dotted line in FIG. 4, and the machined work 1 is unloaded from the main body chuck 12 of the main spindle 2. It is passed to the chuck claws 48 of the chuck 14, and then the main body chuck 12 of the spindle 2 is slightly retracted to the headstock 3 side, where the work supply device 9 is lowered and the chuck claws 47 of the loader chuck 13 are moved to the spindle 2 side. Body chuck 12
The spindle 2 advances slightly from the headstock 3, and the unworked workpiece 1 is passed from the chuck jaws 47 of the loader chuck 13 to the main body chuck 12 of the spindle 2. Next, the spindle 2 retracts to the headstock 3 side, the work supply device 9 rises, and the chuck claws 48 of the unloader chuck 14 move upward to a position facing the chuck claws 46 of the swivel chuck 10. Therefore, the unloader chuck 14
When the chuck claw 48 of the swivel chuck faces the empty chuck claw 46 of the swivel chuck 10, the chuck claw 46 of the swivel chuck 10 advances, and the chuck claw 46 of the swivel chuck 10 is processed from the chuck claw 48 of the unloader chuck 14. Work 1 is handed over. On the other hand, the main body chuck 1 of the spindle 2
When 2 grips the unworked workpiece 1, the spindle 2 becomes the workpiece 1
To a machining position 26, the machining liquid is ejected, and the work 1 is machined into a predetermined machining shape by a predetermined predetermined cutting tool (not shown).

E. A step of accommodating the processed work 1 from the intermediate delivery chuck 7 into the pallet 5 through the pickup device 8: The processed work 1 is rotated by the chuck 10
When the chuck claw 46 of the above is grasped, the forward / backward movement cylinder 23 of the linear movement device 21 retracts the turning chuck 10, moves it to the delivery position 19 of the end of the mounting base 6 which is the work delivery position, and the turning device 20 turns. The cylinder 22 operates and the chuck claw 46 of the swivel chuck 10 is swung upward. Chuck claw 46 of the turning chuck 10
Above the table, the chuck claws 4 of the pickup chuck 11
5 is positioned, the chuck claw 45 of the pickup chuck 11 is slightly lowered along the vertical axis 17, so that the processed work 1 gripped by the chuck claw 46 of the swivel chuck 10 is transferred to the pickup chuck 1
It is delivered to the chuck claw 45 of No. 1. Next, the pickup chuck 11 rises along the vertical axis 17 and
The vertical shaft 17 moves in the front-rear direction along the front-rear shaft 16, and the front-rear shaft 16 moves in the left-right direction along the left-right shaft 15,
Thereby, the chuck jaws 4 of the pickup chuck 11
5 is a predetermined work support tool 3 in which the pallet 5 is empty
8, the pickup chuck 11 is lowered along the vertical shaft 17, and the processed work 1 is set on a predetermined work support 38.

This work transfer device repeats the above-mentioned steps so that the work support 38 for the pallet 5 is supported.
It is possible to machine all the work 1 set in the NC machine 49. When all the machining of the work 1 set on the pallet 5 is completed, the pallet-mounting slide 3
4 is pulled out from the installation position 27 to the setup position 28 and replaced with a new pallet 5 on which the unworked work 1 is set, or the processed work 1 is taken out from the pallet 5 and the unworked work 1 is removed. Set up on the pallet 5.

[0038]

As described above, in the work transfer device according to the present invention, the mounting base, which is the pallet stocker, is attached to the cover structure separately provided outside the machine body having the headstock. The loader chuck and the unloader chuck of the work supply device can be configured to be a single axis drive in the vertical direction by reducing the space required for installation of the device itself and providing the pickup device and the intermediate transfer device on the mounting base. By simplifying the transfer area, shortening the transfer distance, and overlapping the movement times of each chuck device, the transfer time can be shortened, and the time required to transfer the work pallet to the spindle can be made closer to the time required to process the work. The work efficiency is increased, the cost of the machine itself is reduced, and the running cost of the work is increased. It can be reduced. Also, since the mounting base that mounts the pallet is mounted on the cover structure whose supporting state is separate and independent from the machine body equipped with the headstock, the process by the work transfer operation improves the machining accuracy of the NC machine. The work can be delivered reliably and with high accuracy without adversely affecting it, and without causing adverse effects on the accuracy of delivery of the work to and from each chuck device, such as vibration caused by machining of the work by the NC machine.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of a work transfer device according to the present invention.

FIG. 2 is a front view showing the work transfer device of FIG.

3 is a side view showing the work transfer device of FIG. 1. FIG.

4 is a front view showing a main part of the work transfer device of FIG. 1. FIG.

5 is a side view showing a main part of the work transfer device of FIG. 1. FIG.

6 is a plan view showing a main part of the work transfer device of FIG. 1. FIG.

FIG. 7 is an explanatory diagram showing the principle of the work transfer device shown in FIG. 4;

8 is a plan view showing an intermediate delivery device in the work delivery device of FIG. 1. FIG.

9 is a front view showing an intermediate delivery device in the work delivery device of FIG. 1. FIG.

[Explanation of symbols]

1 work 2 spindles 3 Headstock 4 Cover structure 5 pallets 6 Mounting base (stocker) 7 Intermediate delivery device 8 Pickup device 9 Work supply device 10 swivel chuck 11 Pickup chuck 12 Body chuck 13 Loader chuck 14 Unloader chuck 15 Left and right axis 16 front-rear axis 17 Vertical axis 19 Delivery position 20 swivel device 21 Linear movement device 22 swivel cylinder 23 Linear moving cylinder 24 Chuck support device 25 Vertical movement device 26 Processing position 27 Installation position 28 Setup position 29 Positioning reference pin 30 Delivery confirmation sensor 34 Sliding table on pallet 35 beds (machine body) 38 Work support on pallet 45,46,47,48 Chuck claw 49 NC machine

Claims (13)

[Claims] 1. A headstock for rotatably supporting a spindle on which a work is mounted, a cover structure provided outside a machine body having the headstock, and the cover so as to be located above the headstock. A mounting base mounted on a structure and on which a pallet on which the work is set is installed, an intermediate transfer device including a swing chuck provided on the mounting base, and a pallet and a swing chuck provided on the mounting base. Pick-up device having a pickup chuck for transferring the work between them, and a work transfer device including a work supply device having a loader chuck and an unloader chuck for transferring the work between the swing chuck and the main body chuck of the spindle. . 2. The headstock rotatably supports the spindle for processing the workpiece, and transfers the workpiece to a delivery area and a standby area between the spindle and the loader chuck or the unloader chuck. The work transfer device according to claim 1, wherein the main shaft is supported so as to be linearly movable to move the work to the processing area. 3. The pickup device planarly moves the pickup chuck between a work support at a predetermined position on the pallet to which the predetermined work is delivered and the swivel chuck, The work transfer device according to claim 1 or 2, further comprising moving the pickup chuck up and down with respect to the work support or the swing chuck to transfer the work. 4. The intermediate delivery device swivels the swivel chuck to face the swivel chuck to the pickup chuck, and swivels the swivel chuck to face the swivel chuck to the loader chuck or the unloader chuck. The work transfer device according to any one of claims 1 to 3, further comprising linearly moving the swivel chuck to transfer the work to the loader chuck or the unloader chuck. 5. The work transfer device according to claim 1, wherein the work supply device moves the loader chuck and the unloader chuck up and down in order to face the swivel chuck or the spindle. apparatus. 6. The pick-up device comprises a left-right axis extending in the left-right direction installed on the mounting base, a front-rear axis movable in the left-right direction along the left-right axis, and a left-right direction extending along the front-rear axis. Vertical axis that can move in the right-and-left direction at right angles,
The work transfer device according to any one of claims 1 to 5, further comprising: a pickup chuck having a downwardly movable chuck claw that is vertically movable along the vertical axis. 7. The intermediate delivery device of the intermediate delivery device is arranged so as to face the pickup chuck movable to the end of the left and right shaft and the loader chuck or the unloader chuck of the work supply device. The work transfer device according to claim 6, comprising a revolving device for revolving the revolving chuck and a linear movement device for moving the revolving device in the left-right direction. 8. A swivel device that swivels the swivel chuck in the intermediate delivery device is composed of a swivel cylinder that swivels the swivel chuck upward and sideways.
8. The linear movement device comprises a linear movement cylinder for moving the rotary chuck to a position facing the pickup chuck and a position facing the loader chuck or the unloader chuck. Work delivery device. 9. The work supply device includes a vertical movement device for vertically moving a chuck support device, to which the loader chuck and the unloader chuck are attached, between a main body chuck of the spindle and the swing chuck. The work transfer device according to claim 7. 10. The mounting base is provided with at least a pair of the pallets, and the pallets on the mounting base are exchangeably mounted. Work transfer device. 11. The pallet on the attachment base is attached to a slide table provided on the attachment base, and the slide table is set for delivery of the work by the pickup chuck. A set position and a set-up position for setting or removing the work on a work support provided on the pallet, or for mounting or removing the pallet on the slide base for replacing the pallet. The work transfer device according to any one of claims 1 to 10, wherein the work transfer device is configured to be slidable between them. 12. The mounting base is provided with a positioning reference pin that determines an installation position to be set on a slide table of a pallet for transferring the work by the pickup chuck. 1 to
Item 11. The work transfer device according to any one of items 11. 13. The pickup chuck, the swivel chuck, the loader chuck, and the unloader chuck, the delivery confirmation sensor for confirming the presence or absence of the work, the chuck claw for gripping the work, and the work for pushing out the work from the chuck claw. 13. A pusher for holding the pusher, according to any one of claims 1 to 12.
Work transfer device according to item.