JPH0810502Y2 - Machine tool work pallet changer - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a work pallet changing device for a machine tool, and more particularly to a machine tool provided with a table index capable of attaching and detaching a vertical work pallet from a horizontal side. The present invention relates to an attached work pallet changing device.

[Prior art]

Conventionally, in numerically controlled machine tools such as machining centers, vertical specifications have a vertical spindle and a table that supports a work pallet on which workpieces are set, and horizontal specifications have a horizontal spindle. As a work pallet changing device that has a table index that supports the work pallet rotatably around the vertical axis and supplies the work pallet with the work set to such a machine tool, it is possible to machine multiple work pallets in a horizontal position. A work pallet changer that circulates the machine was used.

In recent years, in order to reduce the installation area of machine tools and increase the rigidity of machine tools, a vertically oriented main shaft and a table index that can be rotated around a horizontal axis are provided, and the work pallet is placed in a vertical posture and horizontally sideways. A machine tool adapted to be transferred to a table index and mounted therein has been developed and put into practical use.

The work pallet changing device 110 attached to the machine tool 100 will be explained. As shown in FIGS.
Pallet magazine to exchange and supply 20 to machine tool 100 1
A plurality of work pallet mounting portions 113 for mounting the work pallets 112 are provided on the pallet magazine 111 in a caterpillar shape so as to be rotatable around horizontal shafts 111a at both ends.

Further, a work attaching / detaching station 114 is provided on the side of the upper end of the pallet magazine 111, and at the work attaching / detaching station 114, the work 120 is positioned and set on the work pallet 112 in a horizontal posture.
The 12 is transferred to the horizontal work pallet mounting portion 113 corresponding to the work mounting / demounting station 114.

On the other hand, when supplying the work 120 to the machine tool 100,
The pallet magazine 111 is driven, and the work pallet 112 on which a predetermined work 120 is set is moved to the table index 101.
When the pallet magazine 111 is transferred vertically to the front end side of the pallet magazine 111 on the horizontal side of the machine, the work pallet 112 is transferred to the table index 101 via the transfer mechanism on the machine tool 100 side. It is designed to be transferred.

[Problems to be solved by the device]

The work pallet changing device 110 is configured such that the pallet magazine 111 can be swung in a caterpillar shape around the two horizontal shafts 111a to mount a plurality of work pallets 112. There is a problem in that the device itself becomes larger than the number of pallets 112 and the manufacturing cost becomes high.

In addition, there is a problem that the turning drive means for turning the pallet magazine 1111 becomes large and complicated, and the manufacturing cost of the work pallet changing device 100 becomes very high.

Further, in the work pallet changing device 110,
Since the work 120 is set on the work pallet 112 in a horizontal posture at the work attaching / detaching station 114,
Even if the work pallet 112 can be easily positioned and set if the work pallet 112 is in a vertical posture due to the shape of the work 120, it takes time to set the work 120, resulting in a decrease in work efficiency or inaccurate positioning, resulting in poor machining accuracy. There is a problem of decrease.

An object of the present invention is to provide a work pallet changing device which has a small size and a simple structure and is excellent in workability for mounting a work.

[Means for solving the problem]

The work pallet exchanging device of the present invention is a work pallet exchanging device for a machine tool equipped with a table index capable of attaching and detaching a vertical work pallet from the side in the horizontal direction. A regular hexagonal pallet magazine having a surface work pallet mounting portion, wherein any one of the work pallet mounting portions in a vertical posture corresponds to the horizontal side of the table index. A pallet magazine, in which the work pallet can be exchanged between the mounting portion and the table index, is provided so as to be rotatable about a horizontal axis concentric with the center of the regular hexagon, and each work pallet mounting portion has a horizontal axis. Workpieces provided with engaging members to which work pallets can be attached and detached from parallel directions, and are placed in the upward horizontal posture of the pallet magazine. A guide member and a support for transferring the work pallet of the work pallet mounting portion are provided on the outer side in the horizontal axis direction of the pallet mounting portion, and at least one of the work pallet mounting portions of the pallet magazine which is in a vertical posture is provided. A guide member and a support base for transferring the work pallet of the work pallet mounting portion are provided on the outer side in the horizontal axis direction, and a swing drive means for swinging and driving the pallet magazine around the horizontal axis is provided.

[Action]

In the work pallet changing device of the present invention, when the work to be processed by the machine tool is set on the work pallet, the work pallet magazine is placed in the upward horizontal position according to the shape of the work. At least one of outer support or pallet magazine
Using one of the vertical supports outside the work pallet mounting part in the horizontal axis direction, transfer the work pallet from the work pallet mounting part to the support base via the guide member, and position the work on the work pallet. set.

Next, the work pallet on which the work is set is transferred to the work pallet mounting portion via the guide member and mounted to the work pallet mounting portion via the engaging member. Thereafter, similarly, the pallet magazine is swiveled, and the work pallets on which the works are set are sequentially transferred to the work pallet mounting portion.

When the attachment of the work pallet to the pallet magazine is completed, the turning drive means is driven to turn the pallet magazine. According to the preset machining order, when a predetermined work pallet is vertically moved to a position corresponding to the horizontal side of the table index and transferred, the work pallet is transferred to the table index and the work is processed. Be started.

When the machining of the work is completed, the work pallet is transferred from the table index to the work pallet mounting portion in the stopped state, and then the pallet magazine is rotated to transfer the next work pallet to the table index as described above.

Next, the pallet magazine is rotated to bring the work pallet, on which the processed work is mounted, into the upward horizontal posture or the vertical posture, and the work pallet is transferred to the support base via the guide member, where the work is placed. Remove from work pallet. Similarly, the work pallet changing device sequentially supplies work pallets with work pieces to the machine tool.

In this way, since the pallet magazine is formed in a regular hexagonal shape, it is possible to provide a work pallet mounting portion having 6 sides, and further, since the number of work pallet mounting portions is large, the pallet magazine can be downsized. The installation area of the work pallet changer becomes smaller, which is advantageous in terms of installation space.

In addition, since the pallet magazine can be rotated about a horizontal axis that is concentric with the center of the regular hexagon, the rotating drive means for driving the pallet magazine can be made smaller and simpler, and therefore the manufacturing cost of the work pallet changing device is reduced. You can

Further, the work can be set on the horizontal work pallet or the vertical work pallet according to its shape, so that the work efficiency of the work attachment / detachment can be improved, and the work can be accurately positioned since it can be positioned on the work pallet. Can be improved.

[Effect of device]

According to the work pallet exchanging device of the present invention, as explained in the above section [Operation], the pallet magazine can be downsized despite the large number of surfaces of the work pallet mounting portion.
The work pallet changer has a smaller installation area, which is advantageous in terms of installation space. The regular hexagonal pallet magazine has a small variation in the weight distribution around its central horizontal axis, so the swivel drive means is small and simple. What you can do, reduce the production cost of the work pallet changer,
The work can be set on the work pallet in the vertical state or the horizontal posture according to the shape of the work, so that the work efficiency of the work attachment / detachment can be improved, and the machining accuracy of the work can be improved. Is obtained.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

In this embodiment, the present invention is applied to a work pallet changing device for a machining center.

Briefly explaining the machining center M,
As shown in FIGS. 1 to 3, the column 1 of the machining center M has a spindle head 3 having a spindle 2 oriented vertically.
Are provided so as to be movable in the vertical direction (Z-axis direction), and the column 1 is movable in the left-right direction (X-axis direction) and the front-back direction (Y-axis direction) via the guide rails 4 and 5. . Further, a table index 7 having a support portion 7a which is rotatable about a horizontal axis in the front-rear direction and detachably supports the work pallet WP, is provided at a substantially central portion of the front wall portion 6 of the frame of the machining center M in the left-right direction. A work pallet changing device PC provided near the right side of the machining center M and a work pallet WP are vertically transferred to the front wall portion 6 on the right side of the table index 7 and the table index 7. A guide device 8 having a transfer mechanism (not shown) for moving is provided.

On the left side of the machining center M, there is an input device and an operation panel 9a for inputting machining data such as machining order and machining information of a plurality of works W, and based on the machining data, a spindle head 3, a table index 7, A control device 9 for driving and controlling the guide device 8 and the work pallet changing device PC is provided.

Next, the work pallet changing device PC will be described.

The work pallet exchanging device PC is for supplying and exchanging a work W to be processed by the machining center M to the machining center M. A base member 10 is provided on the floor near the right side of the machining center M, and the base member 10 A support column 11 is erected at the left end of the base member 10
A support frame 60 is provided on the right side of the pallet magazine, which is supported above the base member 10 by the support columns 11 and the support frame 60 and is rotatable about a horizontal axis oriented in the left-right direction.
20 are provided.

The pallet magazine 20 is for circulating and transporting the work pallet WP on which the work W is set. As shown in FIGS. 3 and 4, the pallet magazine main body 21 has a hexagonal frame shape in a side view, and the pallet. The magazine main body 21 is provided with swivel support members 22 and 23 fixed to the left and right end surfaces respectively with bolts 21a, and the pallet magazine 20 is supported by the base ends 22a and 23a of the swivel support members 22 and 23 via bearings 24. It is supported by the column 11 and the support frame 60, respectively.

As shown in FIGS. 5 and 6, the outer peripheral side surface of the pallet magazine body 21 is provided with six work pallet mounting portions 25 for mounting the work pallets WP, and each work pallet mounting portion 25 has An engaging member 30 that can attach and detach the work pallet WP from the left-right direction is provided as follows.

That is, the engaging plate member 31 is fixed to the protrusion 25a formed in the left-right direction on the bottom of the work pallet mounting portion 25,
Guide support wheels 32 are rotatably mounted on the lower end portions of the engaging plate member 31 at predetermined intervals in the left-right direction.
A guide support wheel 33 having a diameter smaller than that of the guide support wheel 32 is provided on both end portions of 31.
Are mounted at predetermined intervals.

Guide support wheels 40 are mounted on the pallet magazine main body 21 on both sides of each work pallet mounting portion 25 at predetermined intervals.

Here, the work pallet WP will be described. The work pallet WP includes a substantially square pallet member 51, a disc-shaped fixing member 52 fixed to the lower end of the pallet member 51, and a fixing member.
The guide member 53 is fixed to the lower end of the disc 52 and has a disk shape smaller than that of the fixing member 52. The guide member 53 has an engaging groove 54 having a guide groove portion 54a.

Next, the support frame 60 and the work attachment / detachment stations 61 and 62 will be described.

The support frame 60 serves as a workbench for attaching / detaching the work W to / from the work pallet WP, and the first work attaching / detaching station 61 for attaching / detaching the work W is provided at the center of the upper surface of the support frame 60 and the upper portion of the front end surface, respectively. And a second work attachment / detachment station 62.

As shown in FIG. 4, the first work attaching / detaching station 61
Is a station for attaching and detaching the work W with the work pallet WP in a horizontal posture, and the first work attachment / detachment station 61 is provided with a support base turning mechanism as follows. That is, the housing portion 63 is provided in the support frame 60 in a recessed manner, a bearing 64 is annularly provided on the upper inner peripheral portion of the housing portion 63, and the housing portion 63 is rotatable about the vertical axis via the bearing 64. A turning table 65 is provided. In this way, by providing the support platform turning mechanism in the first work attaching / detaching station 61, a plurality of works W or odd-shaped works W can be easily set on the work pallet WP. On the upper surface of the swivel table 65, the engaging groove 54 of the work pallet WP
A support base 66 which can be engaged with is fixed to the left side of the support base 66, and a work pallet attachment portion 25 and a first work attachment / detachment station 61 which are in an upward horizontal posture at a position facing the first work attachment / detachment station 61. A guide member 67 for guiding the work pallet WP is fixedly provided on the support frame 60 in the left-right direction.

The second work attaching / detaching station 62 is a work pallet
It is a station for attaching and detaching the work W with the WP in the vertical posture.
A guide member 69 and a support base 68 are provided in the left-right direction so as to be continuous with the engaging member 30 of the work pallet mounting portion 25 in a vertical posture at a position facing the work attaching / detaching station 62, and the work base is provided on the support base 68. A transfer mechanism (not shown) for transferring the work pallet WP from the pallet mounting portion 25 to the second work mounting / demounting station 62 is provided. The engaging member 30 of the work pallet mounting portion 25, which is in a vertical posture facing the second work attaching / detaching station 62, is connected to the guide member 69 and the support base 68.

Next, the turning drive mechanism 70 for turning the pallet magazine 20 will be described. As shown in FIG. 4, the end face of the pallet magazine main body 21 is provided in the support frame 60 below the first work attaching / detaching station 61. A turning motor 71 composed of an electric motor with a brake is provided in the left-right direction concentrically with the center, and an output shaft 71a of the turning motor 71 is fixed to a base end 23a of a turning support member 23. When supplying the work W to the machining center M, the turning motor 71 is used.
Is controlled by a control signal from the controller 9. The turning motor 71 may be a hydraulic motor or an air motor.

The operation of the work pallet changing device PC configured as described above will be described.

When setting the above work W on the work pallet WP,
When setting the work pallet WP in a horizontal posture depending on the shape of the work W, the swivel table 65 of the first work attaching / detaching station 61 is rotated to position the support base 66 in the left-right direction and the pallet magazine
One of the work pallet mounting portions 25 is positioned in an upward horizontal position at a position facing the first work mounting / demounting station 61 by turning 20 and the work pallet WP is guided from the work pallet mounting portion 25 via the guide member 67. It is transferred to the support base 66.

As shown in FIG. 5, when the work pallet WP is transferred to the work pallet mounting portion 25, the guide support ring 32 contacts the lower inner end surface of the engaging groove 54 and the guide groove portion 54.
The guide support wheel 33 is rotatably engaged with a and the work pallet W
P is mounted so that it does not move in the direction orthogonal to the horizontal axis facing left and right. The guide support wheel 40 is in contact with the lower end side of the pallet member 51.

On the other hand, when setting the work pallet WP in a vertical posture depending on the shape of the work W, the pallet magazine 20 is swiveled to face the second work mounting / demounting station 62, and one of the work pallet mounting portions is provided.
25 in a vertical position and its work pallet mounting part 25
Then, the work pallet WP is transferred to the support base 68 via the guide member 69.

Next, the work W is positioned and set on the work pallet WP, and the work pallet WP is transferred to the work pallet mounting portion 25. Thereafter, in the same manner, the work W is set in the work pallet WP at the first work mounting / demounting station 61 or the second work mounting / demounting station 62, and the work pallet WP is sequentially transferred to the pallet magazine 20.

Work pallet with work for pallet magazine 20
When the installation of WP is completed, the controller 9 turns the turning motor.
A control signal is output to 71 to drive the turning motor 71,
The pallet magazine 20 is driven to rotate. Next, the work pallet WP in which the work W to be processed first is set
Is transferred to the right side of the guide device 8 in a vertical posture, a control signal is output from the control device 9 to cause the turning motor 71 to move.
Is stopped.

Next, the work pallet WP is transferred to the table index 7 by the guide device 8 and fixed to the support portion 7a, and the processing of the work W is started.

When the processing of the work W is completed, the work W is transferred from the table index 7 to the work pallet mounting portion 25 in the stopped state, and thereafter the pallet magazine 20 is driven to rotate, and the work W to be processed next is the above-mentioned. Similarly, it is transferred to the table index 7.

Next, the pallet magazine 20 is driven to rotate, and the work pallet WP on which the processed work W is mounted is the first work attaching / detaching station 61 or the second work attaching / detaching station 62.
Is transferred to the work pallet WP where the work W is removed. Similarly, the works W attached to the pallet magazine 20 are sequentially processed.

In this way, in the work pallet changing device PC,
6 because the pallet magazine 20 is shaped like a hexagon
Since one work pallet mounting portion 25 can be provided and the pallet magazine 20 can be downsized in comparison with the number of work pallets WP to be mounted, the work pallet changing device PC has a small installation area, which is advantageous for installation.

In addition, since the pallet magazine 20 can be swiveled around a horizontal axis that is concentric with the center of the hexagon, the pallet magazine 20 can be swung by a small swivel motor 71 with a small driving force, and the swivel drive mechanism 70 is greatly simplified. The work pallet changer PC can be manufactured at low cost.

Further, since the work W can be attached to the work pallet WP in the horizontal posture or the work pallet WP in the vertical posture according to the shape, the work efficiency can be improved and the work W can be accurately positioned on the work pallet WP. The processing accuracy can be improved.

The pallet magazine 20 is not limited to the hexagonal shape, but may be formed in various polygonal shapes as needed. Also,
The second work attachment / detachment station 62 may be added to the rear end surface of the support frame 60.

Further, the second work attachment / detachment station 62 can be used as a station dedicated to attachment / detachment of the work W, and the first work attachment / detachment station 61 can be used as a transfer station for connecting to another machine tool, or in another process. You may use W as a station for carrying in the set work pallet WP.

[Brief description of drawings]

FIGS. 1 to 6 show an embodiment of the present invention. FIG. 1 is a front view of a machining center and a work pallet changing device, FIG. 2 is a plan view of the same, and FIG. 3 is III-III of FIG. 4 is a sectional view taken along the line IV-IV in the state where one of the work pallet mounting portions is in an upward horizontal position, FIG. 5 is a side view of the main portion of the pallet magazine body, and FIG. Fig. 5
VI arrow views, FIGS. 7 and 8 relate to the prior art, FIG. 7 is a plan view of a machine tool and a work pallet changing device, and FIG. 8 is a side view of the device. 7: Table index, 20: Pallet magazine, 25: Work pallet mounting part, 30: Engaging member, 66
・ 68 …… Support base, 67 ・ 69 …… Guide member, 71 …… Spinning motor, M …… Machining center, W …… Workpiece, WP… Work pallet.

Claims (1)

[Scope of utility model registration request] 1. A work pallet exchanging device for a machine tool equipped with a table index capable of attaching and detaching a vertical work pallet from a horizontal side, in a position near one side of the machine tool, and a work pallet having six sides on an outer peripheral portion. In a regular hexagonal pallet magazine having a mounting portion, any one of the work pallet mounting portions in the vertical posture corresponds to the horizontal side of the table index, and the work pallet mounting portion in the vertical posture and the table. A pallet magazine in which the work pallets can be exchanged with the index is provided so that it can be rotated around a horizontal axis that is concentric with the center of the regular hexagon, and each work pallet mounting section is parallel to the horizontal axis. The work pallet has an engaging member that can be attached and detached. A guide member and a support base for transferring the work pallet of the work pallet mounting portion are provided on the outer side in the direction, and at least one vertical position of the work pallet mounting portion of the pallet magazine on the outer side in the horizontal axis direction. A work pallet for a machine tool, which is provided with a guide member and a support base for transferring the work pallet of the work pallet mounting portion, and a slewing drive means for slewing and driving the pallet magazine around a horizontal axis. Exchange device.