JPS6033616B2 - Tool spindle that can be used with both large and small diameter tools - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is a machine tool, particularly a machine tool with an automatic tool changer, in which a large diameter tool shank is inserted and gripped into a tool spindle with a removable tool shank having a different shank shape. This invention relates to a tool spindle that can be used in combination with large diameter tools and small diameter tools.

The earlier application of the same applicant, Hakama Gansho No. 51-33109 "Adapter for gripping small diameter tools" has a shank of the same shape as a large diameter tool with a taper shank, and a small diameter tool with a straight shank is inserted inside the shank. A Kokubo tool gripping adapter is disclosed, and by using this Kokubo tool gripping adapter, it is possible to commonly mount both a large and small tool on one tool spindle. There is.

The object of the present invention is to arrange a group of large-diameter tools and a group of small-diameter tools with mutually different shank shapes at minimum intervals in a tool storage magazine so that they do not interfere with each other, which is the object of the prior application. In order to increase the number of tools that can be stored in the tool storage magazine, we have created a small diameter tool that has a shank of the same shape as a large diameter tool with various shank shapes, and into which small diameter tools with various shank shapes can be inserted. To provide a tool gripping adapter. Another object of the present invention is to provide the above-mentioned small tool gripping adapter in order to reduce the overall number of tools in a group control system production line, to achieve efficient tool utilization and to reduce maintenance and management costs. A machine tool equipped with an automatic tool changer that can commonly mount both large-diameter tools and small-diameter tools with various shank shapes on one tool spindle is installed in the production line, and different types of machining can be performed. To provide a tool spindle that can be used in combination with a large-diameter tool and a small-diameter tool, which allows various tools to be diverted and used in common between machines.

In order to achieve the above object, the present invention has a shank having the same shape as a straight shank Oyo tool, and by providing a small diameter tool gripping adapter into which a straight shank small diameter tool can be inserted. To provide a tool spindle that allows both a straight shank large-diameter tool and a straight shank small-diameter tool to be commonly mounted on the same tool spindle.

In addition, the present invention has a shank having the same shape as a large straight shank tool, and by providing an adapter for holding a small diameter tool into which a small diameter tool with a taper shank can be inserted. To provide a tool spindle that allows both a flat tool and a tapered shank small depression tool to be commonly mounted on one tool spindle.

Furthermore, the present invention has a shank having the same shape as a large-diameter taper shank tool, and has four taper shank holes inside the shank.
・A tool spindle that makes it possible to mount both a large diameter tool with a taper shank and a small diameter tool with a taper shank in common on one tool spindle by providing a small diameter tool gripping adapter into which a tapered shank tool can be inserted. is to provide.

Furthermore, the present invention provides a small-diameter tool gripping adapter that has a shank having the same shape as a large-diameter taper-shank tool, and also serves as a gripping member for inserting and gripping a straight-shank small-diameter tool into the adapter. To provide a tool spindle that allows both a large-diameter taper shank tool and a straight shank four-way tool to be commonly mounted on one tool spindle.

Hereinafter, each embodiment of the present invention will be described in detail based on the drawings.

Each example described below is based on the Samurai Kao 51-33109
It is attached to the tool spindle of the spindle head of a machine tool such as a machine tool with an automatic tool changer disclosed in No. ``Small Diameter Tool Gripping Adapter''. 1 and 2 show a first embodiment of the present invention, FIG. 1 shows a straight shank small hollow tool Ts attached via an adapter, and FIG. 2 shows a straight shank small hollow tool Ts. The shank is shown with the big tool TL attached.

A tool spindle 2 is rotatably supported on the spindle head 1 by bearings 3A and 38. A through hole 4 is bored in the tool spindle 2 from the front end to the rear, and a tapered hole 4A is formed at the front end of the through hole 4. A large diameter tool gripping collet 5 having a tapered outer peripheral portion 6A that fits into the tapered hole 4A is inserted into the through hole 4 so as to be slidable in the direction of the bag,
The rear end is mated to the front end of the tool swab 6. The through hole of the huge tool gripping collet 5? Inside, a circular information plate 8 is inserted so as to be slidable in the direction of the drum.

A two-part retraction collet 9 is screwed into the sliding plate 8, and the tip of the retraction collet 9 extends to the vicinity of the tool gripping portion 58 of the large-diameter tool gripping collet 5. The collar 1 inserted into the spring is fixed to the flange 7A of the through hole 7, and a disk spring is inserted between the collar and the super motion plate 8. Therefore, the slat plate 8G is always biased backward by the disk spring 111.The pin 12 provided on the sliding plate 8 fits into the long register 13 of the large-diameter tool gripping collet 5, and slides. The motion plate 8 is prevented from rotating.

Two pins 14A and 148 are screwed into the tool spindle 2 in a radial direction facing each other, and the large-diameter tool gripping collet 5
The tip thereof reaches the through hole 7 of the large diameter tool gripping collet 5 through the long grooves 15A and 15B. Slanted surfaces 16A, 16B are formed in the intermediate portion of the retracting collet 9 to engage and come into contact with the tips of the pins 14A, 14B.
6B rides on the tips of the pins 14A and 14B, and the retraction collet 9 is closed. As shown in Fig. 2, the rear part of the shank part 17 of the straight shank Daiyo tool TL has a stepped hole 1 in its center with a narrow entrance and a wide inside.
8 is formed, and the stepped portion 18A of the hole 18 can be engaged with the stepped portions 19A and 19B at the tip of the retraction collet 9.

In the state shown in FIG. 2, the retraction collet 9 is retracted to the rear of the large-diameter tool by the pressing force of the disc spring 11.

Therefore, the rear end 8A of the sliding plate 8 fixed to the pull-in collet 9 is separated from the threaded portion front end 6A of the tool striped rod 6. Therefore, after gripping the flange portion of the large-diameter tool TL by the tool transfer arm 201, which has the same structure as the tool transfer arm disclosed in the previous article, when the tool tightening rod 6 moves forward from the state shown in FIG. The flat tool gripping collet 5 moves forward and the large-diameter tool gripping collet 5 begins to open, at the same time the disc spring 11 begins to loosen. When the large diameter tool gripping collet 5 moves forward slightly, the front end 6A of the threaded part of the tool attachment rod 6 comes into contact with the rear end 8A of the sliding plate 8, and as the large diameter tool gripping collet 5 moves forward, the retraction collet 9 is also integrated. move forward. As the retraction collet 9 moves forward, the inclined surfaces 16A and 16B move toward the pin 14 as described above.
A, Climb onto the tip of turtle 4B and pull it in to collect 9
is closed, and the hole 18 at the rear of the shank part 17 of the Oyo tool T is closed.
The stepped portion 19A of the retracting collet 9,
The outer diameter of turtle 9B becomes smaller. Therefore, the tool transfer arm 201
Therefore, if the large tool TL is pulled out forward in the axial direction,
The Daiyo tool TL is extracted from the tool master 2.

Next, when a new large-diameter tool TL is inserted into the tool spindle 2 by the two tool transfer arms, the large-diameter tool gripping collet 5 moves back and begins to close as the tool retainer 6 moves back. With the retreat of the large-diameter tool gripping collet 5, the retracting collet 9 is also caused to retreat via the disc spring 11, and the inclined surfaces 16A, 1
6B separates from the tips of the pins 14A and 14B, and the retraction collet 9 opens.
A, 198 engages with the stepped portion 18A of the hole 18 of the shank portion 17 of the large diameter tool TL, and the large diameter tool T
Pull L. At the same time as this operation is completed, the large tool gripping collet 5 is tightened. Therefore, “Okami Tools TL
is strongly locked to the tool spindle 2 by the gripping force of the Oyo tool gripping collet 5 and the pulling force of the retraction collet 9.A disc-shaped tool shank holding plate 2 is attached to the front of the tool spindle 2. and holds the large light portion 17A of the shank portion 17 of the large tool TL inserted into the tool spindle 2.

In addition, a key 22 is attached to the front surface of the tool shank holding plate 21, and when the Oyo tool TL is inserted into the tool spindle 2,
The key 22 is fitted into the keyway 23 of the flange portion of the large-diameter tool TL to prevent the large-diameter tool T from rotating. As shown in FIG. 1, the small-diameter tool gripping adapter 24 has exactly the same external structure as the shank wing 7 of the large tool T.

The small diameter tool gripping adapter 24 has a through hole 2 at its axis.
5 is bored, and a tapered hole 25A is formed at the front end of the through hole 25.
is formed. The through hole 25 has the tapered hole 2
A small-diameter tool gripping collet 26 having a tapered outer circumferential portion 26A that is engaged with the collet 5A is inserted so as to be movable in the axial direction.
At the rear of the Koyo tool gripping collet 26, a stepped hole 27 with a narrow entrance and a wide inside is formed in the center of the same machine as in the case of the Oyo tool T, and a stepped hole 27A of the hole 27, The stepped portion 19A at the tip of the retracting collet 9 can be engaged with the turtle 9B.

However, the hole 27 is formed shallower than the hole angle 8 of the Daiyo tool TL, and when the retracting collet 9 moves forward, the front end of the retracting collet 9 comes into contact with the bottom surface of the hole 27, causing the small diameter tool gripping collet 26 to be slightly The action of pushing out and loosening the small diameter tool gripping collet 26 is performed. A tool shank holding plate 28 is attached to the front end surface of the small-diameter tool holding adapter 24, and an elastic link 29 inserted into the inner surface of the plate fits into a V-groove 30A formed in the shank portion 30 of the small-diameter tool Ts. Adapter 2 for holding a small diameter tool Ts
4 is always locked. The flange portion of the small-diameter tool gripping adapter 24 is also formed with a key groove 31 to which the key 22 joins, as in the case of the large-diameter tool TL, and the small-diameter tool gripping adapter 24 is prevented from rotating. There is.

Further, the keyway 31 of the small-diameter tool gripping adapter 24 is deeply hollowed out, and a pawl 32 is pivotally supported by a pin 33 in the keyway 31 . The tip of the pawl 32 can be engaged with the groove 22A formed in the key 22, and the gripping pawl of the tool transfer arm 20 can be used to hold the tool after the tool gripping adapter 24 is inserted into the tool spindle 2. , spring 34
As a result, the claw 32 is urged outward, and the engagement state between the groove 22A and the tip of the claw 32 is maintained. Next, a description will be given of the tool exchange operation when only the small diameter tool Ts is extracted from the small diameter tool gripping adapter 24.

First, by using the gripping claw of the tool transfer arm 28, the hanging tool Ts is
After gripping the flange portion of the tool TL, when the tool clamping rod 6 moves forward from the state shown in Fig. 5, the tool clamping collet 5 moves forward, similar to the tool changing operation of the large diameter tool TL. begins to open. When the large-diameter tool gripping collet moves forward slightly, the retracting collet 9
also move forward together, and the inclined plane 6A9 168 and pin 14A,
The retraction collet 9 begins to close due to the engagement with the tip of the piston 48.During its forward movement, the retraction collet 9 contacts the bottom of the hole cloud 7 of the small-diameter tool gripping collet 26, and continues to grip the small-diameter tool during the remaining forward stroke. Push out the collet 26 slightly and loosen the small diameter tool gripping collet 26.

When the large diameter tool gripping collet S and the retraction collet 9 have completed their advancement, the outer diameters of the stepped portions 9A and 9B of the retraction collet 9 are smaller than the entrance diameter of the hole 27 at the rear of the small diameter tool gripping collet 26. Therefore, if the small diameter tool Ts is extracted forward in the axial direction from the tool transfer arm 28' against the elastic force of the link 29, the small diameter tool Ts
Only the small tool is pulled out from the small tool gripping adapter 24.

At this time, the small-diameter tool gripping adapter 24 has a claw 32 that is attached to the key 2.
Since it is hooked on the groove 22A of No. 2, it does not slip out from the tool spindle 2. Next, when a new small-diameter tool Ts is inserted into the small-diameter tool gripping adapter 24 of the tool spindle 2 by the tool transfer arm 201, the large-diameter tool gripping collet 5 retreats as the tool clamping rod 6 retreats. and start to close.

As the large-diameter tool gripping collet 5 retreats, the retracting collet 9 is also retreated via the disc spring il, and the inclined surface 16
A, 16B are separated from the tips of pins 14A, 14B,
The retraction collet 9 opens, and the steps 19A and 19B at the tip of the retraction collet 9 engage with the step 27A of the hole 27 at the rear of the tool gripping collet 26, thereby pulling in the small diameter tool gripping collet 26 and holding the small diameter tool Ts. grasp. After this, while bending the disc spring 1 1, the Oyo tool gripping collet 5
By moving back slightly, the small diameter tool gripping adapter 2
4 is grasped again by the Oyo tool gripping collet 5, and further pressing force is applied to the retraction collet 9 via the disc spring turtle 1.Next, the small diameter tool Ts is attached to the small diameter tool gripping adapter 24. We will explain the tool exchange operation when removing the mamamo from the tool spindle 2.
After gripping the flange portion of the small-diameter tool gripping adapter 24 with the gripping claws 8, the tool gripper 6 is moved forward in the same manner as the tool changing operation of the small-diameter tool Ts, and the tool gripping collet S is opened and the tool gripping collet S is opened. The retraction collet 9 is moved forward to close the retraction collet 9. When the gripping claw of the tool transfer arm 20 grips the flange portion of the small diameter tool gripping adapter 24, the tool gripping claw of the tool transfer arm 28 pushes the claw 32, In order to remove the tip of the pawl 32 from the groove 22A of the key 22, the small diameter tool gripping adapter 24 can be pulled out from the tool spindle 2 by moving the tool transfer arm 2 box forward in the direction of the wisteria line. "The small diameter tool Ts is held in the small diameter tool gripping adapter 24 by the elastic force of the link 2 flea, so it will not come off from the small diameter tool gripping adapter 24 during the tool change operation. As mentioned above, the straight shank The large diameter tool TL, the straight shank small diameter tool Ts, and the small diameter tool gripping adapter 24 are connected to the tool spindle 2.
selectively installed. Next, a second embodiment of the present invention will be explained in detail based on FIG.

FIG. 3 shows an embodiment in which both a straight shank large-diameter tool and a tapered shank small-diameter tool can be commonly mounted on one tool spindle. The small-diameter tool gripping adapter 35, which has the same shank shape as the large-diameter tool, has a through hole 36 at its center, and a tapered hole 36A at the front end of the through hole 36.

The taper shaft portion 37 of the small diameter tool Ts is inserted into the taper hole 36A. At the rear of the tapered shank portion 37, there is a bull stud 3 that engages with a retraction collet to be described later.
7A is installed. Adapter 3 for gripping small diameter tools
A ring spring 38 is inserted into the middle of the shank portion of 5, and the ring spring 38 protrudes slightly from the surface of the through hole 36. The ring spring 38 is attached to the rear part of the taper shank portion 37 of the small diameter tool Ts. V-shaped groove 37 to fit into
B is formed. Therefore, when the small diameter tool Ts is removed from the tool spindle 2 while being attached to the small diameter tool gripping adapter 35, the small diameter tool Ts will not fall off from the small diameter tool gripping adapter 35. The other structure of the small-diameter tool gripping adapter 35 is exactly the same as that of the first embodiment, and the tip of the claw 32 is normally caught in the groove 22A of the key 22, and the small-diameter tool gripping adapter 35 is This prevents it from coming off the tool spindle 2. A sliding plate 8 that is slidably inserted into the through hole 7 of the Oyo tool gripping collet 5 is screwed with a two-part retracting collet 40, and the tip of the retracting collet 40 is connected to the small tool gripping collet 5. adapter 3
5, and its tip grips the pull stud 37A of the small diameter tool Ts.

Further, a pin 14 is provided on the outer periphery of the intermediate portion of the retracting collet 40.
Slanted surfaces 41A, 41B that engage and come into contact with the tips of A, 14B
is formed, and when the large-diameter tool gripping collet 5 moves forward, the inclined surfaces 41A, 41B move along the tips of the pins 14A, 14B, and the retracting collet 40 opens.
Release the grip of the pull stud 37A. Daiyo Tools T
L (not shown) has exactly the same shank shape as the small diameter tool gripping adapter 35.

However, in order to prevent interference with the tip of the retracting collet 40,
At the rear axis, there is a through hole 3 for a small diameter tool gripping adapter.
A hole with the same diameter as 6 is bored. In the second embodiment of the present invention shown in FIG. 3, a tool exchange operation when only the small diameter tool Ts is extracted from the small diameter tool gripping adapter 35 will be described.

First, after gripping the flange portion of the small-diameter tool Ts by the gripping claw of the tool transfer arm 20, when the tool gripping collet 5 moves forward as the tool vertical attachment 6 moves forward from the state shown in FIG.
The large diameter tool gripping collet 5 begins to open. When the Oyo tool gripping collet 5 moves forward slightly, the front end 6A of the threaded part of the tool tightening bar 6 and the rear end 8A of the sliding plate 8 come into contact with each other, so that the retracting collet 40 moves forward together, and the forehead slopes 41A, 41B are moved forward. Moving along the tips of the pins 14A, 14B, the retraction collet 40 opens and releases the grip on the pull stud 37A. During its forward movement, the retracting collet 4 comes into contact with the rear end of the taper shank portion 37 of the small diameter tool Ts, and with the remaining forward stroke, it pushes out the small diameter tool Ts slightly, causing the taper hole 36A and the shank portion 37 to connect. Release the tense state. Even in this state, the ring spring 38 remains fitted into the V-shaped groove 37B at the rear of the tapered shank portion 37. Therefore, the small depression tool T of the taper shank is moved by the tool transfer arm 20 against the elastic force of the ring spring 38.
If s is pulled out forward in the direction of the marking line, only the small diameter tool Ts is pulled out from the small diameter tool gripping adapter 35.

Next, when a new small diameter tool Ts is inserted into the small diameter tool gripping adapter 35 of the tool spindle 2 by the tool transfer arm 201, the large tool gripping collet 5 moves back as the tool attachment rod 6 moves back. and begin to close. As the large-diameter tool gripping collet 5 retreats, the retracting collet 40 is also caused to retreat via the disk spring 11, and the inclined surfaces 41A and 41B move toward the pin 14A.
, 14B, the retraction collet 40 closes and grips the bull stud 37A of the small diameter tool Ts.
With the remaining stroke of the retracting collet 40, the small indecent tool T
s is pulled in and locked into the small diameter tool gripping adapter 35. Thereafter, the small diameter tool gripping adapter 35 is gripped by a slight backward movement of the large tool gripping collet 5. Next, a description will be given of a tool exchange operation when the small diameter tool Ts is removed from the tool spindle 2 while being attached to the small diameter tool gripping adapter 35.

First, after gripping the flange portion of the small-diameter tool gripping adapter 35 by the tool transfer arm 20', the tool replacement rod 6 is advanced in the same manner as the tool exchange operation of the small-diameter tool Ts, and the large-diameter tool gripping collet 5 is moved forward. At the same time as opening, retract collet 4
Q is moved forward to release the grip on the pull stud 37A.
When the tool transfer arm 20 grasps the flange portion of the small depression tool grasping adapter 35, the tool grasping claw of the tool transfer arm 28 pushes in the claw 32 and removes the tip of the claw 32 from the groove 22A of the key 22. By moving the transfer arm 28 forward in the direction of the track line, it becomes possible to pull out the small-diameter tool gripping adapter 35 from the tool spindle 2.
S is held in the small tool gripping adapter S box by the elastic force of the ring spring holder, so it will not slip out of the small adjustment tool gripping adapter S box during the tool exchange operation. The tool exchange operation of attaching to and removing from the tool spindle 2 is exactly the same as in the case of the Kojaku tool gripping adapter Ikuhan.As mentioned above, the straight shank large-diameter tool TL and the tapered shank small-diameter tool Ts In addition, a small diameter tool gripping adapter 3 is selectively attached to the tool spindle 2. Next, a third embodiment of the present invention will be described in detail based on the figure below.

Figure 4 shows both a large diameter tool TL with a taper shank (not shown, but it has the same shank shape as the adapter turtle 3 for gripping hook tools) and a small-diameter tool Ts with a large shank on one tool spindle. This shows an example in which it is possible to commonly install the tool. A taper hole 42A is formed into which the taper shank portion of the TL (not shown) and the taper shank portion A of the small-diameter tool gripping adapter 3 can be inserted.

A key holder 2 is attached to the front surface of the tool handle 2, and the adapter umbrella 3 for holding the large-sized tool TL and small-diameter tool is connected to the tapered hole 42.
When inserted into A, the key 22 is inserted into the keyway of the Oyo tool TL flange part and the key groove 44 of the Oyo tool gripping adapter 43.
compete with each other to prevent rotation of the large tool TL and the large tool gripping adapter 43. Further, the key groove 44 of the small tool gripping adapter 48 is deeply hollowed out, and the claw 46 of the key groove 441 is movably supported by the pin 46. The tip of the claw pin 6 can be engaged with the groove 22A formed in the key 2. When the small-diameter tool gripping adapter Tsuru 8 is attached to the taper hole crane 2A, the tip of the claw pin 6 can be engaged with the groove 22A formed in the key 2. 5 is pushed outward, and the engagement state between the groove 22A and the tip of the claw 45 is maintained.The center of the adapter mother 3 for gripping small diameter tools has a tapered hole 48A and a parallel hole turtle light B. A through hole consisting of is drilled, and the taper shank part 49A of the small diameter tool Ts is fitted into the tapered hole &8A, and the parallel part 49B at the rear end of the small diameter tool Ts is fitted into the parallel hole 4B.

Groove depth 0 at the rear of the shank part of the small diameter tool gripping adapter 43
In 1, a link-sama medical turtle is inserted, and the link spring 5 and the parallel hole protrude slightly into the climbing B. A groove 52 into which the link spring trap fits is formed in the parallel portion 49B of the small tool Ts. Therefore, t small flea tool Ts
When removing the small diameter tool T from the taper hole A of the tool spindle 2 while it is attached to the small diameter tool gripping adapter 3,
s will not fall off from the small-diameter tool gripping adapter turtle 3. A large diameter tool TL is attached to the rear end of the shank of the small diameter tool Ts.
Similarly, a bull stud 581 with the same shape and positioned in the same position when the tool is inserted into the spindle is installed. t Small diameter tool gripping adapter &3
protrudes rearward from the rear end of the

A tool weaving rod 5 is also inserted into the through-hole box 2 of the tool spindle 2 so as to be slidable in the depth direction.

There are multiple small holes 55 in a radial manner at the front end of the tool cotton-attached humiliation mother.
A steel ball 56 that fits into the pull stud 53 is inserted into the drilled small hole 561 . In the through hole 42 of the tool spindle 2, there is a sleeve 57 at the twill part of the taper hole A.
is inserted. The sleeve 57 is equipped with a hard-working odor holder 54.
A small diameter portion 57A that slidably receives the tool, and a large portion 578 into which the steel ball 56 can escape when the tool attachment rod 5 moves forward are formed. Inside the tool tightening rod 54 is a T-rod 5.
8 is inserted so as to be able to slide over it, and is always urged forward by a spring 59. Therefore, when the small-diameter tool Ts held via the small-diameter tool holding adapter 43 is removed from the tool spindle 2, the rod 58 moves forward and t
This prevents the steel ball 56 from falling. In the third embodiment of the present invention shown in the lower figure, the tool exchange operation when only the 4 flea tool Ts is extracted from the small tool gripping adapter 43 will be described.

First, after gripping the flange portion of the small-diameter tool Ts with the two tool transfer arms, when the tool tightening rod 64 is advanced from the state shown in FIG. , the engagement between the steel ball 56 and the bull stud 53 is disengaged, and the front end of the tool attachment rod 54 comes into contact with the rear end of the shank of the small diameter tool Ts, pushing out the small diameter tool Ts slightly and separating the small diameter tool Ts from the small diameter tool Ts. The tightly tightened state with the tool gripping adapter 43 is released. However, since the link spring 51 does not come out of the groove 52, the small diameter tool Ts is held within the small diameter tool gripping adapter 43. The tool tightening rod 54 is further moved forward slightly, and the front end of the tool tightening rod 54 is applied to the rear end of the small diameter tool gripping adapter 43.
After loosening it slightly from the taper hole 42A, stop. At this time, since the claw 45 is urged outward by the spring 47, the engagement state between the groove 22A and the tip of the claw 45 is maintained. Therefore, if the small-diameter tool Ts of the taper shank is extracted forward in the axial direction by the gripping claw of the tool transfer arm 20 against the elastic force of the ring spring 51, only the small-diameter tool Ts is extracted from the small-diameter tool gripping adapter 43.

Next, when the tool transfer arm 20 is also inserted into the new small diameter tool Ts and the diameter tool gripping adapter 43, the tool tightening rod 54 is moved back and the steel ball 56 and the bull stud 53 of the small diameter tool Ts are engaged. Then, the small-diameter tool Ts and the small-diameter tool gripping adapter 43 are locked in the taper hole 42A of the tool spindle 2 via the small-diameter tool Ts. Next, a description will be given of a tool exchange operation when the small diameter tool Ts is removed from the tapered hole 42A of the tool spindle 2 while being attached to the small diameter tool gripping adapter 43.

First, after gripping the flange portion of the small-diameter tool gripping adapter 43 with the gripping claw of the tool transfer arm 20, the tool cotton swab 54 is advanced in the same manner as the tool exchange operation of the small-diameter tool Ts, and the small-diameter tool Ts and the small-diameter While releasing the tightened state with the tool gripping adapter 43, the small diameter tool gripping adapter 43
loosen slightly with respect to the tapered hole 42A. Tool transfer arm 20
When gripping the flange portion of the small-diameter tool gripping adapter 43, the tool gripping claw of the tool transfer arm 20 pushes in the claw 45, removes the tip of the claw 45 from the groove 22A of the key 22, and moves the tool swab 54 forward. Then, pull stud 53 and steel ball 56
By disengaging the small diameter tool gripping adapter 43, the tool transfer arm 20 moves forward in the axial direction.
can be extracted from the taper hole 42A of the tool spindle 2.

During this tool exchange, the climbing tool Ts is held in the small diameter tool gripping adapter 43 by the elastic force of the link spring 51. The tool exchange operation of attaching and removing the large tool TL to and from the tapered hole 42A of the tool spindle 2 is exactly the same as in the case of the small-diameter tool gripping adapter 43 described above.

As described above, the tapered shank large tool TL, the tapered shank 4-flea tool Ts, and the small-diameter tool gripping adapter 43 are selectively attached to the tool main frame 2. Finally, a fourth embodiment of the present invention will be described in detail based on FIG.

FIG. 5 shows an embodiment in which both a tapered shank large-diameter tool TL (not shown) and a straight-shank small-diameter tool Ts can be commonly mounted in the taper hole 42A of one tool spindle 2. It shows. That is, as in FIG. 4, the taper shank portion of the large-diameter tool TL and the taper shank portion 60A of the small-diameter tool gripping adapter 60 can be inserted into the taper hole 42A at the front end of the tool spindle 2.

A parallel hole 62 into which a straight shank portion 61 of a small-diameter tool Ts can be inserted from the front is bored in the bag center of the small-diameter tool gripping adapter 60. In addition, an elastic link 63 is inserted into the inner surface of the front end of the parallel hole 62, and fits into the V-groove 61A formed in the shank portion 61 of the small tool Ts.
The small diameter tool Ts is always locked in the small diameter tool gripping adapter 60. The small diameter tool gripping adapter 60' is formed with a plurality of slit IJ portions 60B, and the small diameter tool gripping adapter 60 itself serves as a collet (gripping member) for gripping the small hollow tool Ts. Therefore, when the small diameter tool gripping adapter 60 is drawn into the tapered hole 42A of the tool spindle 2, the small diameter tool gripping adapter 60 closes and grips the small diameter tool Ts. The small diameter tool gripping adapter 60 is pushed out slightly from the tapered hole 42A (there is some play in the ball direction between the tip of the pawl 45 of the small diameter tool gripping adapter 60 and the groove 22A of the key 22, so the small diameter tool cannot be gripped. ), the small-diameter tool gripping adapter 60 opens and releases the gripping state of the small-diameter tool Ts, but the elastic link spring 63 does not fit into the V-groove 61A of the small-diameter tool Ts. Since it is stuck in, the small tool Ts does not fall off from the small tool gripping adapter 60. In order to draw the small-diameter tool gripping adapter 60 into the tapered hole 42A, use the Oyo tool T.
Similarly to L, at the rear end of the Koyo tool gripping adapter 60,
Pull stud 6 that can engage with steel ball 56 of tool vertical rod 54
4 is installed. The rest of the structure is exactly the same as the embodiment shown in FIG. 4 above. In a fourth embodiment of the present invention shown in FIG.
The tool exchange operation when only the small diameter tool Ts is extracted from the tool will be explained. First, after gripping the flange portion of the small-diameter tool Ts with the gripping claw of the tool transfer arm 20, when the tool tightening rod 54 is advanced from the state shown in FIG.
7, the steel ball 56 disengages from the pull stud 64, and the front end of the tool tightening rod 54 comes into contact with the rear end of the small diameter tool gripping adapter 60, and the small diameter tool is gripped. Slightly push out the adapter 60 for small diameter tool Ts
Release the grip state. Therefore, if the small diameter tool Ts is extracted forward in the axial direction by the gripping claw of the tool transfer arm 20 against the elastic force of the ring spring 63, only the small diameter tool Ts is extracted from the 4-diameter tool gripping adapter 60.

Next, when a new small-diameter tool Ts is inserted into the small-diameter tool gripping adapter 60 by the gripping claw of the tool transfer arm 20, the vertical tool rod 54 retreats and the 4.
and attach the small diameter tool gripping adapter 60 to the tool spindle 2.
The exchange of the two-diameter tool Ts is completed by locking it into the taper hole 42A and grasping the small-diameter tool Ts. Next, a description will be given of a tool exchange operation in the case where the Koyo tool Ts is removed from the tapered hole 42A of the tool spindle 2 with the Kokubo tool gripping adapter 601 attached.

First, after gripping the flange portion of the small-diameter tool gripping adapter 60 with the gripping claw of the tool transfer arm 20, the tool replacement rod 54 is advanced in the same manner as the tool exchange operation of the small-diameter tool Ts described above, and the small-diameter tool gripping adapter 60 is Push out the adapter 60 slightly. When the gripping claw of the tool transfer arm 20 grips the small-diameter tool gripping adapter 60, the tip of the claw 45 comes off the groove 22A of the key 22, so the tool transfer arm 20 moves forward in the axial direction.
Connect the small diameter tool gripping adapter 60 to the taper hole 4 of the tool spindle 2.
It becomes possible to extract from 2A. During this tool exchange, the small diameter tool Ts is moved by the elastic force of the ring spring 63.
It is held within the small tool holding adapter 60. The tool exchange operation of attaching and removing the large-diameter tool TL to and from the taper hole 42A of the tool spindle 2 is exactly the same as in the case of the above-mentioned 4. tool gripping adapter 60.

As described above, the tapered shank large tool TL, the straight shank small diameter tool Ts, and the small diameter tool gripping adapter 60 are selectively attached to the tool spindle 2. In the fourth embodiment of the present invention described above, if a tapered hole is bored in the center of the small-diameter tool gripping adapter 60 instead of the parallel hole 62, the other structure is exactly the same, and a small-diameter tool with a tapered shank can be used. It becomes possible to install it. As stated above, the present invention is not limited to the configurations shown in the examples, and modifications are expected without departing from the technical idea of the present invention as described in the claims. .

[Brief explanation of the drawing]

1 and 2 show a first embodiment of the present invention, and FIG. 1 is a cross-sectional view of the spindle head showing a state in which a straight shank small-diameter tool Ts is attached via an adapter; Fig. 2 is a cross-sectional view of the spindle head showing the state in which the straight shank Daiyo tool TL is installed, and Fig. 3 is the second embodiment of the present invention.
FIG. 4 is a sectional view of the spindle head showing an embodiment of the present invention.
FIG. 5 is a sectional view of the main shaft showing a fourth embodiment of the present invention. In the figure: 1...Spindle head, 2...Tool spindle, 4A
...7per hole, 5...large diameter tool gripping collet, 6...
...Tool cotton attachment, 9...Retracting collet, 11...
Belleville spring, 16A, 16B... Inclined surface, 19A, 19
B...Stepped portion, 20...Tool transfer arm, 2
4... 4. Adapter for gripping the Yomo tool, 26...
・Small diameter tool gripping collet, 29...Ring, 3
2...Claw, 34...Spring, 35...
・Adapter for gripping small diameter tools, 37...Naper shank part, 37A...Pull stud, 39...Steel ball, 37B
...V-shaped groove, 40...Retraction collet,
41A, 41B...Slanted surface, 43...Small tool gripping adapter, 45...Claw, 48A...7-pa hole, 49A...Boopa shank portion, 51...Steel ball , 5
3...Full Stud, 54...Tool cotton stick, 56...Steel ball, 60...Kohyo tool gripping adapter, 60A...71 Passyunk Department, 60
B...Sliwa IJ part, 61...Straight shank part,
63...Ring, 64...Pull stud, TL...
...Large diameter tool, Ts...Small diameter tool. Figure 5 Figure 1 Figure 2 Shinnu

Claims (1)

[Scope of Claims] 1. A tool spindle having a tool tightening member for gripping the straight shank of a large-diameter tool mounted on the tool spindle, and a straight shank of the large-diameter tool to be mounted on the tool spindle. an adapter for gripping a small-diameter tool, which has a gripping member inside thereof that is movable in the axial direction of the spindle and grips the straight shank portion of a small-diameter tool by moving in the axial direction; and the gripping member and the tool. It consists of an engaging member that is provided between the tool clamping member in the main shaft, disengages from the gripping member when the tool clamping member moves forward, and engages when it retreats, and is used not only for large-diameter tools, but also for large-diameter tools. A tool spindle that can be used in combination with large-diameter tools and small-diameter tools, characterized in that small-diameter tools can also be attached to and tightened on the tool spindle via a small-diameter tool gripping adapter. 2. A tool spindle having a tool tightening member that grips a straight shank of a large diameter tool mounted on the tool spindle, and a shank having the same shape as the straight shank of the large diameter tool to be mounted on the tool spindle. a small-diameter tool gripping adapter having a taper hole into which a taper shank portion of a small-diameter tool can be inserted, and a small-diameter tool gripping adapter provided between a rear end of the taper shank portion of the small-diameter tool and a tool tightening member in the tool spindle, and an engaging member that engages with the rear end of the taper shank portion of the small diameter tool to push out the small diameter tool when the tool tightening member moves forward and pull it in when it retreats, and the engagement member engages with the rear end of the taper shank portion of the small diameter tool to push out the small diameter tool when the tool tightening member moves forward and pull it in when it retreats. A tool spindle that can be used with both large-diameter tools and small-diameter tools, which is characterized by the fact that it is also attached to the tool spindle and tightened. 3. A tool spindle having a tool tightening member that engages with the rear end of the taper shank portion of a large diameter tool mounted on the tool spindle to pull the large diameter tool into the tool insertion hole and tighten it, and a tool spindle to be mounted on the tool spindle. , a small diameter tool that has the same shank shape as the taper shank portion of the large diameter tool, has a tool insertion hole into which the taper shank portion of the small diameter tool can be inserted, and can be attached to the tool insertion hole by an automatic tool changer. The small-diameter tool-gripping adapter itself or the rear end of the tapered part of the small-diameter tool that protrudes rearward from the small-diameter tool-gripping adapter is attached to the tool so that the tool-gripping adapter and the rear end of the shank part of the large-diameter tool are approximately at the same position. A tool spindle that can be used in combination with large-diameter tools and small-diameter tools, characterized in that not only large-diameter tools but also small-diameter tools can be mounted and tightened on the tool spindle via a small-diameter tool gripping adapter by pulling in with a tightening member.