JPS60155340A - Indexing/positioning device of main shaft attachment - Google Patents

Abstract

PURPOSE:To make it possible to automatically change the angle of an attachment main shaft by providing on the end face of a main shaft sleeve a positioning block with a piston rod free to move forward or backward and by engaging it with the whirl-stop pin of a main shaft attachment. CONSTITUTION:When a main shaft 3 is indexed to the exchange position by the change order and a main shaft attachment 6 is set on the main shaft 3, the key groove of a flange 9 is whirl-stopped and positioned with a main shaft key 3a and a taper shank 7 is fitted on the main shaft. Next, in order to set an attachment main shaft 11 at the prescribed angular position, the main shaft 3 is angle- indexed and flow paths 26 and 27 are switched. When the path 26 is supplied with oil, a piston rod 25 is pushed out and a whirl-stop pin cone face 12a engages with a concave section 25a at the tip of the rod 25, and therefore a shifter 14 disengages from a whirl-stop piece 15. In this way, a frame 10 is fixed and the rotation of the main shaft 3 is transmitted to the main shaft 11 so that a work can be machined with a drill or boring tool set on the main shaft 11. To change the direction, the flow path is switched to change the angle of the main shaft 6.

Description

TECHNICAL FIELD The present invention relates to a positioning device for indexing the attachment spindle of a swing spindle attachment (JIJ) stored in a magazine together with ordinary tools in a machining center.

A variety of conventional machining center tools are commercially available, including multi-axis attachments that can mount two or three drills, taps, etc. in parallel, and spindle attachments that have an attachment spindle perpendicular to the spindle. However, when this tool is mounted on an automatic tool changer or spindle, it is rotated in a fixed direction to avoid interference with other tools, changers, etc. If you want to change the direction, install a positioning block on the spindle side at the required position, but the orientation of the tool stored in the magazine is determined so that it will not interfere with other tools. This was a huge inconvenience.

SUMMARY OF THE INVENTION In view of the above, the present invention provides an indexing and positioning device for a spindle attachment which is capable of indexing and positioning a spindle attachment to a rectangular position 1d without manual operation.

Solution: The spindle is stored in the same way as the tool, and the machining direction must be determined by indexing the angle perpendicular to the attachment axis.The attachment frame supports the rotating shaft of the attachment, and a hole is printed parallel to the attachment axis. a locking pin provided slidably in the axial direction; a means for urging the locking pin to protrude toward the main shaft; It consists of a plurality of positioning blocks that engage with each other.

Example Hereinafter, embodiments of the present invention will be described based on the diagram] IJJ.

As for spindle attachments, we will explain those that have the attachment spindle in a direction perpendicular to the spindle, but there are also multi-axis attachments that have multiple drills, taps, etc. parallel to the spindle, or attachments that can perform planar machining. There is also a planer tool installed in the axial direction at a distance from the central axis (see Figure 6). The spindle sleeve 2 fitted on the spindle head has a bearing attached to it.
The main spindle 3 is supported so that it can rotate 1J1, and there is a drawbar at the center of the main spindle that lowers the tool onto the main spindle using a collet 4.
5, the well-known structure is inserted. The main spindle attachment 6 has a pull stud 8 at the tip of the taper shank 7, and a grip rM9a of an automatic tool attachment U is cut into the 78 part 7 land 9, and a relative rotation IJ] is enabled by a bearing on the center shaft following the flange 9. Attachment frame 10
or fitted. This attachment frame has
The attachment main shaft 11 is rotatably supported by bearings in the direction perpendicular to the main shafts, and the distance between the main shaft and the center shaft is N.
Rotation is transmitted by gears not shown. In addition, a part of the attachment frame 10 protrudes in the direction 1], and a detent pin 1 is attached to this part apart from the central axis and parallel to the center axis.
2 is axially supported in the sliding opening J'rji:.

This detent pin 12 is always urged to protrude by a spring 16 with a predetermined amount of protrusion toward the main shaft side, and in this state, the detent pin 12 is provided perpendicularly to the detent pin 12 and attached to the frame 10. The shifter 14, which is prevented from rotating by a rod 60, has a bifurcated end with a cut in the direction of the main axis, and is engaged with a rotation prevention piece 15 protruding in the direction of the flange 2 (11). )fl<Dt
Immediately, the tool shank 7 and the attachment frame 10 are integrally connected. - Between the ends of the spindle sleeve 2, a disk 18 of the same diameter forming a cylinder member is sandwiched between the donut circles @i6 and 17 of 24. Porto 21
installed by. The cylinder member is provided with a plurality of cylinders 22 having axes extending in the direction of the main shafts at the necessary circumferential elbows (positions that determine the direction of the attachment main shafts), and the disks 17 of td at positions corresponding to the cylinders 22. A hole 26 through which the piston rod passes is concentrically formed. A piston 24 is fitted into the cylinder 22, and a piston rod 25 having four portions 25& whose tip engages with the conical surface 12& of the head of the anti-rotation pin 12 passes through the hole 26 of the disk M, and prevents rotation when released. It is adapted to engage with the pin 12.

Further, the cylinder 22 is opened with conduits 26 and 27 for supplying pressure oil to both sides of the piston 24, respectively. This%u
The current amount of oil t% 28.29 is cut on both sides of the disc 18 so that each chamber of the D cylinders 22 is supplied with oil. Therefore, when pressure oil is sent to the flow path 26 or 27, each piston rod 25 of each cylinder 22 is energized to -t'' 114.

As shown in the figure, since the fR is in progress, pressure oil is sent to the oil passage 27, the piston 24 is pushed, and the piston rod 25 is retracted, and the main shaft attachment 6 is moved toward the shifter 1.
The attachment main shaft 11 is stored in a magazine in a fixed direction.

When the spindle 6 is indexed to the exchange position 1α by the exchange command and the spindle attachment ε is attached to the spindle 3 by the tool exchange arm, the keyway of the flange 9 of the spindle attachment 6 is rotated and positioned by the key 3a of the spindle, and the collet is The pull stud 8 is pulled up by the draw bar 5 through the pull stud 4 and lowered to the taper shank 7 or the main d-ill. Next, move the attachment main shaft 11 to the main I1.
l16 is angularly indexed. Flow Nb due to completion of indexing
When 26 and 27 are switched and pressurized oil is sent to the flow path 26, the piston 24 is pushed to the right position and the piston rod 25 is completely extended. The conical space 12& of the rotation stopper pin 120 engages with the four parts 25& at the tip of the piston rod 25 and is pushed in, so that the shifter 14 is disengaged from the rotation stopper piece 15.

For this reason, the attachment shaft 6 reframe 10 is fixed, and the rotation of the ball shaft 6 is transmitted from the taper shank 7 to the center shaft and the attachment shaft 11 through valves on both sides, and is mounted on this shaft. A drill or boring tool that is being drilled is used to make one tool.When you want to change the direction of the tool, l>if: Switch the oil to channels 26 and 27 to flow channel 27. Pressure oil is sent to move the piston rod 25 back and disengage it from the locking pin 12. Therefore, the locking pin 12 is pushed out by the spring 16 and moves toward the shifter 14.
When the spindle attachment 6 is rotated by being guided by the rotation stopper 30 and engaged with the rotation stopper piece 15, the main shaft attachment 6 becomes integrated with the attachment frame 10. After this, the main shaft 3 is indexed and the attachment main shaft 11 is directed to the desired direction. The piston rod 25 which switches the direction of the pressure oil to deliver the pressure h11 to the flow path 26 is made to protrude and similarly engaged with the locking pin 12. When machining is completed and a command to change the tool is issued, the direction of the pressure fluid is switched and the pressure fluid is sent to the flow path 26 to change the piston rod 2.
After moving the shifter 14 backward and engaging the rotation prevention piece 15 to integrate the attachment rotating part and the attachment frame 1o, the main spindle 6 is moved to the tool exchange position where the attachment main spindle 11 with one side does not interfere. , stored in a magazine by a tool changer.

Effects As detailed above, the present invention provides a positioning block 1d made of a piston rod capable of advancing and retracting according to commands at a predetermined angular position on the end face of the spindle sleeve, and engages with the rotation stop pin of the spindle attachment. Therefore, by using an inexpensive spindle attachment, the angle of the attachment spindle can be automatically changed and the number of attachments can be reduced.

4. 1st story 1■jmu naru 6mei Figure 1 is the wooden brother IJi (1) Vertical 1 circle diagram of installation, 2nd N
1 and 3 are views showing the Brenna river attachment.

3... Main shaft 6... Main shaft attachment 10...
Attachment frame 11...Attachment king +i・+! +12...
Stopping pin 14...Shifter 15...Stopping piece 22...Cylinder 25...Piston lot mark if
f-out・11 people Daiei Co., Ltd. g-: Rikosho

Claims (2)

[Claims] (1) In a No. machine tool where tools stored in a magazine and tools mounted on the spindle are exchanged by an automatic tool changer, the tools are stored in the same way as tools, and the machining direction is determined by indexing the angle within a plane perpendicular to the attachment axis. A detent pin is provided on an attachment frame of a spindle attachment for which it is necessary to determine the detent pin, parallel to the attachment axis and slidable in the axial direction, and means for urging the detent pin to protrude toward the spindle. (
A positioning device for the main spindle attachment. (2) The main shaft according to claim 1, wherein the rotating portion of the main shaft attachment is provided with an engaging member, and the rotating pin is provided with a shifter that engages with the retaining member when the pin is protruded. Attachment indexing and positioning device.