JP2522030Y2 - Automatic tool changer for attachments - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic tool changer capable of supporting not only the main shaft of the machine but also an extension attachment main shaft or various angular attachment main shafts having different angles.

[0002]

2. Description of the Related Art A machining center as shown in FIG.
Various attachments having different angles that are detachably mounted on the spindle ram 101 are prepared to cope with various processing. Conventionally, the tool change for this attachment spindle is done with the vertical spindle of the extension attachment,
In most cases, the tool can be automatically changed with respect to the horizontal main axis of the 90 ° angular attachment 102. However, for angular attachments other than 90 °, the replacement arm unit 103 must be turned in accordance with the angle of the attachment. The tool 104 for clamping and unscrewing the spindle tool, which is commonly called a tool hammer device, which is fixed on the machine side, must also be tilted according to the attachment angle. Especially when various angular attachments with different angles are mixed, the structure becomes complicated. At present.

[0003]

[Problems to be Solved by the Invention] 9 described in the prior art
The method of manually performing a tool change for an angular attachment other than 0 ° has a problem that it becomes an obstacle to automation. The present invention has been made in view of such problems of the conventional technology, and has as its object to provide an automatic tool changer which can cope with a case where various angular attachments other than 90 ° are mixed. It is something to offer.

[0004]

In order to achieve the above-mentioned object, an automatic tool changer compatible with an angular attachment according to the present invention is applicable to not only the main spindle of the machine but also an extension attachment main spindle or various types of angular attachment main spindles having different angles. the automatic tool changer of the magazine with the machine tool, turning in accordance with the respective shaft angle of the camcorder main axis or angular attachment at a right angle plane to the direction of the movement is provided between the magazine and the spindle head to the movable carrier split An exchanging arm unit that can be extended, a swiveling table that is stored on the opposite side of the exchanging arm of the exchanging arm in the same direction as the exchanging arm swiveling axis, is swiveled 90 °, protrudes, and faces the carrier moving direction; driving means for turning as necessary, the revolving stand
A replacement arm provided at a protruding portion and facing the rear side of the angular attachment main spindle at the time of tool attachment / detachment, and acting on a pulling member of a mounting tool to remove and release a clamp. Things.

[0005]

After the division of the cutting process by the tool attached to the angular attachment attached to the spindle ram is completed, the angular attachment is turned to the tool changing angle, the spindle ram is positioned at the tool changing position, and the tool is set by the NC. An exchange command is output. The exchange arm unit that is waiting while holding the next tool by one of the grip claws is positioned at a predetermined position just before the tool exchange position by moving the carrier, and the exchange arm unit is turned in accordance with the angular attachment angle.

Next, the turntable is turned by 90 ° and protrudes in the carrier moving direction, and the spigot portion engages with the fitting portion at the rear end of the angular attachment by moving the carrier to the tool change position on the spindle side. Next, the unscrewing device in the swivel table operates to release the clamp of the attachment mounting tool and push the tool slightly out of the tapered hole of the attachment main shaft, and at the same time, the exchange arm extends in the direction of the rotation axis and removes the tool from the attachment main shaft. .

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment will be described with reference to FIGS. In the portal type machining center shown in FIG. 2, a table 2 is mounted on a bed 1 placed on the floor so as to be movable in the X-axis direction, and columns 3 are erected on the floors on both sides of the bed 1, and a top beam is placed on the column 3. 4 is fixed.
A guide surface in the W-axis direction parallel to the Z-axis is drilled on the front surface of the column 3, and the cross beam 5 is mounted on this guide surface so as to be movable and positionable, and guides the cross beam 5 in the Y-axis direction. Spindle head 6 on the surface
Are mounted so as to be movable and positionable.

A spindle ram 7 is supported on the spindle head 6 so as to be movable in the Z-axis position. A spindle and a horizontal spindle are rotatably supported on a head portion of the spindle ram 7, and are disposed below the spindle ram 7. Various angular attachments, for example, a 90 ° angular attachment 8A or a 45 ° angular attachment 8B are mounted so as to be detachable and turnable in a horizontal plane. The attachment spindle 9 is rotated by the vertical spindle of the machine.

A tool pulling rod 11 is fitted in the center hole of the attachment main shaft 9 so as to be movable in the axial direction. The tool pulling rod 11 is constantly urged by a plurality of disc springs 12 to pull in the tool T at its tip. Has a collet 13 for gripping the pull stud Ta, and a rear end of the collet 13 is fixed to the attachment body 14 and projects from a center hole of the rear lid 15. And back lid 1
5 has a spigot part 1 cut out from a swivel 16 which will be described later.
6a is engaged with the moving direction of the carrier 19
Are Kezu設to.

On the other hand, a tool magazine device 17 is installed on the left floor of the column 3, and a magazine pot 18 for storing a plurality of tools facing left in the Y-axis direction is connected endlessly by a link-like chain. , Is indexed to the front tool change position.

The carrier 19 is placed on the guide of the cross beam 5 in the Y-axis direction.
Is mounted so as to be movable and positionable, and an exchange arm unit 21 is supported on the right side of the carrier 19 so as to be pivotable in a plane perpendicular to the X-axis. Replacement arm unit 21
The tool change arm 22 can be turned about 90 ° and 180 ° around the change arm turning axis 23 and can be inserted and removed in the turning axis direction. The changing arm unit 21 is turned by an NC control servo motor (not shown). 23 can be indexed at an arbitrary angle within a range from 0 ° vertically to 90 ° horizontally.

[0012] In a recess (pocket) provided in the exchange arm unit 21 in parallel with the pivot shaft 23, the pocket crosses the pocket.
A swivel 16 pivotally supported by a support shaft 24 provided in the direction is stored . Pinion 26 to the distal end of the support shaft 24 Waso is fitted, engraved on the piston 28 of the oil pinion 26 is provided in parallel with the pivot axis 23 which is journalled in the exchange unit 21 <br/> pressure cylinder 27 Rack 28
a.

[0013] The swivel base 16 is 90 ° in a reciprocating piston that by the switching of the hydraulic fluid supplied to the hydraulic cylinder 27
Turned forward and reverse to make a right angle to the turning axis 23, right over half
(Figure 3) is projected from the right end surface of the change arm unit 21
The carrier in the moving direction . Tool change arm 22 on the end parts of the projection of the swivel slide 16 there
Aligns with the tool grip axis when attaching / detaching the tool of touchment spindle 9
A hydraulic cylinder 29 is formed at a right angle so as to be at a rear facing position . Also replace when the protruding part protrudes
Insert in the carrier movement direction on the side of the end that is the arm side
The part 16a is cut out. The tip of the piston rod 31 of the hydraulic cylinder 29 projects into the center of the spigot portion 16a, and presses the rear end face of the tool pulling rod 11 as necessary.

Next, the operation of this embodiment will be described.
Now, 90 ° angular attachment 8A to spindle ram 7
Is installed and the tool T mounted on the attachment spindle 9
The cutting process is performed. And the exchange arm 22
The replacement arm unit 21 that vertically and downwardly grips the next tool with one gripping claw is waiting at the left moving end.

When the cutting process by the attachment spindle 9 mounting tool is completed, the spindle ram 7 moves in the Z-axis and is positioned at a predetermined replacement position, and at the same time, the angular attachment 8A is turned, and the attachment spindle 9 is moved to the X-axis. When the tool is indexed forward and a tool change command is output from the NC, the carrier 19 moves to the main spindle side in the Y-axis direction and is positioned at a predetermined position before the tool change position. Next, the replacement arm unit 21 is turned by 90 ° to make the turning shaft 23 horizontal, pressure oil is sent from the port a of the hydraulic cylinder 27, and the turning table 16 is moved through the rack 28 a and the pinion 26.
Is developed by 90 °, and the right-hand majority projects in the X-axis direction.

Next, when the carrier 19 moves to the main spindle side again and is positioned at a predetermined tool change position, the swivel 16
Is engaged with the fitting portion 15a provided on the lid 15 of the 90 ° angular attachment. Next, the exchange arm 22 turns by approximately 90 ° to grip the used tool T of the attachment main shaft 9 with the other empty gripping claw.

Then, pressure oil is sent to the rear chamber of the hydraulic cylinder 29, the piston rod 31 advances, the tool pulling rod 11 is pushed out against the force of the disc spring 12, and the collet 13
Is opened, the used tool is slightly pushed out by hitting the end face of the pull stud Ta with the tip face. At the same time, the exchange arm 22 extends in the direction of the pivot axis to extract the used tool from the attachment main spindle 9, and the positions of the two tools to be rotated and held by 180 ° are switched, and the next tool is contracted in the direction of the pivot axis to insert the next tool into the attachment main spindle 9. .

Then, pressure oil is supplied to the front chamber of the hydraulic cylinder 29, the piston rod 31 is retracted, the tool pulling rod 11 is retracted by the force of the disc spring 12, and the collet 13 grips the neck of the pull stud Ta. Then, the next tool T is clamped to the attachment spindle 9. Next, the exchange arm 22
Is rotated in the opposite direction by approximately 90 ° and separated from the next tool, the carrier 19 is moved to the magazine side in the Y-axis direction, and the spigot portion 16a of the revolving base 16 is separated from the fitting portion 15a of the angular attachment 8A. The pressurized oil is sent to the port b of 27, and the swivel 16 rotates 90 ° and is stored in the pocket of the exchange arm unit. Next, the carrier 19 is continuously moved to the magazine side in the Y-axis direction, and the used tool T to be gripped is returned to the magazine pot 18 of the tool magazine device 17 by a sub-arm (not shown) via a ready station pot (not shown).

Next, a 45 ° angular attachment 8B
When the used tool T to be mounted on the tool is to be replaced, the carrier 19 is positioned at a predetermined position before the tool replacement position, and the replacement arm unit 21 is moved to the position indicated by the phantom line in FIG.
After turning by 5 ° and deploying the turntable 16 by 90 °, the carrier 19 is moved to the tool changing position, so that the spigot portion 16a engages with the fitting portion 15a.

Next, the exchange arm 22 is turned by approximately 90 ° to grip the used tool T with an empty gripping claw, and pressurized oil is sent to the rear chamber of the hydraulic cylinder 29 to push out the tool pulling rod 11 and collet. 13 is apart from the pull stud Ta, the used tool T is slightly pushed out from the main shaft taper hole of the 30 ° angular attachment 8B by hitting the tip of the pull stud with the tip of the tool pulling rod, and at the same time, the exchange arm 22 extends in the pivot axis direction. The used tool T from the attachment spindle.

Next, the next tool T is inserted into the attachment main shaft by the 180 ° rotation of the exchange arm 22 and the contraction in the direction of the rotation axis, the pressurized oil is sent to the front chamber of the hydraulic cylinder 29, and the tool pulling rod 11 retreats. After the next tool is clamped and the spigot part 16a separates from the fitting part 15a on the left side of the carrier, the turntable 16 is turned 90 ° and stored in the pocket of the exchange arm unit 21. In addition, in the case of an attachment having a built-in device for removing the main spindle and a tool clamp, automatic tool change is performed by a conventional change operation without expanding the swivel base.

[0022]

[Effects of the Invention] The present invention is configured as described above and has the following effects. The exchange arm unit provided on the carrier movable in the spindle head moving direction is turned in accordance with the angle of the main spindle of this machine or the attachment main spindle,
The swivel table, which is oriented in the same direction as the exchange arm pivot axis stored in the exchange arm unit, is turned by 90 ° and protrudes in the carrier movement direction. When using multiple angular attachments with different angles, it is not necessary to have a dedicated replacement device and a tool clamp removal device. Tool change can be performed quickly and reliably.

[Brief description of the drawings]

FIG. 1 is a side view of an attachment-compatible automatic tool changer and a 90 ° angular attachment according to the present embodiment.

FIG. 2 is a view of a portal machining center.

FIG. 3 is a top view of FIG. 1;

FIG. 4 is a side view of FIG. 3;

FIG. 5 is a perspective view showing a state in which a tool for a 90 ° angular attachment is being replaced by the attachment-compatible automatic tool changing apparatus.

FIG. 6 is a cross-sectional view showing a 90 ° angular attachment and a tool clamp removal device.

FIG. 7 is a view of a conventional portal machining center.

FIG. 8 is a perspective view of the automatic tool changing device during automatic tool changing for a 90 ° angular attachment by the conventional automatic tool changing device.

[Explanation of symbols]

 6 Spindle Head 7 Spindle Ram 8A 90 ° Angular Attachment 8B 45 ° Angular Attachment 11 Tool Pulling Bar 16 Swivel 19 Carrier 21 Replacement Arm Unit 22 Replacement Arm 27,29 Hydraulic Cylinder

Claims (1)

(57) [Scope of request for utility model registration] 1. An automatic tool changer for a machine tool with a magazine corresponding to an extension attachment spindle or various angular attachment spindles having different angles in addition to a main spindle of the machine, wherein the automatic tool changer is provided on a carrier movable between the magazine and the spindle head. identical in perpendicular plane to the direction of movement and the main shaft angle together turning indexable exchange arm unit of the camcorder main axis or angular attachment, the change arm pivot axis on the opposite side of the changing arm of the exchange arm unit A turntable that is stored and turned 90 degrees and projects in the direction of the carrier movement, drive means for turning the turntable as required, and a protrusion of the turntable.
Including said switching arm is provided at a portion of output acts on the pulling member of the opposed position to instrumentation <br/> Chakukogu the tool detachment at the rear of the angular attachment spindle and means for the removing over the clamp An automatic tool changer compatible with attachments.