JPS6171939A - Tool replace magazine - Google Patents

Abstract

PURPOSE:To index a tool at a specified position quickly and exactly by fixing a single unit of magazine and the supporting frame of the central shaft with a pin aligning the center of the single unit of magazine equipped with a plurality of tool holding mechanisms on the periphery with the center of a supporting body. CONSTITUTION:On the periphery of the almost circle supporting body 12 of a magazine for tool replacement, a single unit of magazine 8 equipped with a plurality of tool holding mechanisms 13 for holding tools 3 is installed with the center of the supporting body 12 aligning with the center of the central shaft 11 which is so installed as to be rotated freely in the peripheral direction of the frame F1 and F2 of a tool pallet F and with the holding direction of the tools 3 made by the tool holding mechanisms 13 being almost parallel to the central shaft 11. A fixing hole 24a is provided to either the single unit of magazine 8 or the frame F2, and a fixing pin 23 for stopping the free rotation of the single unit of magazine 8 being inserted into the fixing hole 24a caused by the travel of a main spindle holding the tools 3 is provide to another one.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a replacement tool magazine used in a self-spindle 4@1 machine.

Recently, many processing facilities (FMS) have been provided in which a large number of machining centers and the like are installed side by side and these machine tools are collectively controlled by a computer. As with any other tool, the tools used in this equipment must be replaced when they reach the end of their service life, break, or when the object of processing changes.

The conventional method for replacing blue tools is (a)
Stop the machine tool and manually replace the tools in the tool magazine.

(b) Make the tool magazine of the machine tool replaceable and replace the tools together with the magazine.

(0) Exchange tools between the tool magazine of the machine tool and another sub-magazine.

However, in the case of (a) above, it is necessary to stop the machine and replace tools, which lowers the operating rate and requires human labor, so unmanned operation is not possible. There is a drawback.

In the case of (b), common tools and dedicated tools are used depending on the process and object of the workpiece in general machining, but when storing them in one tool magazine,
The replacement method of replacing the entire magazine is not only uneconomical as it requires common tools for each magazine, but also requires equipment for transporting the magazine and loading it onto the machine tool, as well as regular tools such as positioning and clamping equipment. This method has disadvantages in that it requires equipment other than the exchange device, is expensive, and requires a large space. Furthermore, in the case of a lot, a transport indexing device for the sub-magazine, a loading device for the tool magazine of the machine tool, etc. are required, and the above (bl
As in the case of , it is expensive and has the drawbacks of taking up a lot of space.

The present invention is designed to mount a single magazine equipped with a tool holding mechanism on the outer periphery so that the center axis coincides with the center of the support, and the tool holding mechanism holds the tool almost parallel to the central axis. The support frame for the magazine itself and the center shaft is
By providing individual fixing pins and fixing holes, the above-mentioned problem of conventional interlocking points is eliminated, and the tool can be quickly and accurately positioned by operating the main shaft of the machine tool without the need for a dedicated tool indexing device. It is an object of the present invention to provide a replacement tool magazine that can be indexed to the desired position and can hold a large number of long tools.

The present invention will be explained below with reference to the drawings.

FIG. 1 shows an overview of a replacement tool magazine 5 and a machine tool A according to the present invention. One tool 3 can be taken out from the main shaft 4 and mounted on the main shaft 4, and the tool 3 can also be taken out from the main shaft 4 and returned to the special tool magazine 1.

An automatic pallet changer C is disposed in front of the rotary chive B of the machine tool A, and the automatic pallet changer C is used to handle a workpiece barre (E) carried by an automatic guided vehicle or a tool pallet F carrying a replacement tool magazine (5) of the present invention. It is possible to feed the pallet onto the rotary table B through the automatic pallet changer C. Note that the machine tool A, rotary table B1, auto pallet changer C, etc. described above are well known.

2 to 4 show an embodiment of the replacement tool magazine 5 of the present invention, which is made up of a pair of magazine units 7 and 8 that are integrally connected by a body 6, and a pair of magazines 7 and 8 fixed to a tool pallet F. It is fixed via a stopper ring 25 to a central shaft 11 supported by a pair of bearings 9.10 provided at the upper ends of frames F2 and F2, and is movable in the axial direction together with the central shaft 11, and in the circumferential direction. It is rotatably provided. Each magazine unit 7.8 has a plurality of tool holding mechanisms 13 (eight in the figure) arranged at equal intervals on the outer periphery of a disk-shaped support 12, and the tool holding mechanisms 13 on the inner periphery. 1
At position 3, a locking member 16 is provided which moves along the outer periphery of a guide ring 14.15 fixed to the inner end surface of the bosses 9a, 10a of the bearing 9.10. The tool holding mechanism 13 includes a claw holder 13a whose back portion is fitted into a plurality of radial grooves 12b formed on the outer end surface of the support 12 and fixed to the support 12 with bolts or the like.
The root end is housed in the groove 13b of the claw holder 13a, and is rotatably supported by the claw holder 13a by a pivot 18, and has an arcuate protrusion 17a on the inner periphery of the distal end. a pair of claws 17.17 and the claw holder 13.
held in a hole 13c drilled in a, and a pair of claws 17.
17 between the root ends of the mold 17.17.
The tool consists of a pinch spring 19 biasing the distal end side of the tool toward the closing side, and a detent key 13t1 located between the distal end sides of the pair of pawls 17.17 and fixed to the pawl holder 13a. 3 is pushed between the pair of semi-annular claws from the tip side of the claws 17.17, the pair of claws 17.17 rotates about the pivot shaft 18 against the elasticity of the pinch spring 19, and the above-mentioned protrusion The tool 3 is held by inserting the strip 17a into a holding groove 3a provided in the tool 3. Further, the lock member 16 is slidably inserted in the axial direction into a plurality of holes 33 that are radially bored corresponding to the positions of the ring 12 and the claws 17 fixed to the outer end surface of the inner peripheral side of the support body 12. It is biased toward the center of the central shaft 11 by a pressing spring 2o provided between the lock member 16 and the claw holder 13a, rotates together with the support 12, and rotates at its inner end. Department (
To be precise, the positioning roller 21) provided at the inner end is
The guide ring 14.15 is inserted into a pair of positioning grooves 14a115a provided corresponding to the index position of the replacement tool magazine 5, and the outer end is inserted into the claw 17.17 of the tool holding mechanism 13.
The magazine 7.8 is removed from between the root ends of the molding 17.17, and the magazine 7.8 is removed from between the root ends of the molding 17.17.
When the guide ring 14.15 is rotated, the positioning roller 21 is pressed by the pressing portion 14b115b formed on the outer peripheral surface of the guide ring 14.15, and the outer end of the claw 17.17 is pressed against the root end of the claw 17.17 as shown by the two-dot chain line in FIG. 17, to prevent the opening and rotation of the claws 17 and 17.

Here, the pair of magazine units 7 and 8 are fixed as shown in FIG. Pushed to the right, the fixing pin 23 protruding from the ring 12A fixed to the support 12 of the other (right side in FIG. 2) magazine unit 8 is connected to the boss 10a of the bearing 10 and the guide ring 15. The fixed intervening member 24 has the same number of tool holding mechanisms 13 as the pair of single magazines 7.8 (16 in the figure).
), are inserted into the fixing holes 24a formed at equal intervals,
Free rotation about the central axis 11 is prevented.

Further, as shown in FIG. 4, the two magazine units 7.8 are supported on the central shaft 11 with the tool holding mechanisms 13 shifted from each other by a half pitch.

The fixing pin 23 and the fixing hole 24a are arranged so that the pair of magazine units 7.8 can be fixed to the frame F2 at every half pitch.
It constitutes a positioning mechanism that positions each tool holding mechanism 13 at a predetermined index position C (in the case of this embodiment, the central upper end position of the magazine 7.8). In addition, the tool holding mechanism 13 has the tips of the claws 17 facing outward, through which the tool 3 is inserted and extracted, and the rotation plane of the claws 17 about the pivot shaft 18 (perpendicular to the plane of the paper in FIG. 2). It is attached to the outer periphery of the support 12 with its upper and lower planes parallel to the support 12.

12B is a housing fixed to one of the supports 12, and the support 12 is fixed to the central shaft 11 by a spring ring 25 fitted therein. 2
6 is a sliding key whose tip fits into the keyway 27 to stop rotation of the locking member 16 in the circumferential direction;
It is fixed at A. Excessive movement of the magazine unit 7.8 to the right in FIG. 2 is prevented by the outer end surface of the support body 12 coming into contact with the guide ring 15.

Next, the operation of the replacement tool magazine of the present invention will be explained.

The tools 3 prepared at the tool station are held in a predetermined tool holding mechanism 13 of a replacement tool magazine 5 loaded on a tool pallet F. A computer that generally controls machine tools and the like stores the tool pallet store (replacement tool magazine A), the tool store and tool codes in the replacement tool magazine 5 (absolute codes are assigned to tools). The tool bar (F) waits at a pallet storage area until a replacement command is received from the computer.

When a replacement command is given according to the machining schedule, the tool barrel (F) loaded with the replacement tool magazine 5 is transported to the automatic pallet changer C of the machine tool A on an automatic guided vehicle, and is automatically changed along with the replacement tool magazine 5. It is drawn into pallet changer C. Machine tool A
When machining is in progress, the tool bar (F) waits on the automatic pallet changer C until the machining is completed.

When the machining by the machine tool A is completed, the tool barrel F is transferred onto the rotary table B of the machine tool A, and then, for example, the magazine unit 7 side is directed toward the spindle 4, and the center of the replacement tool magazine 5 is placed on the machine tool A. Control axis Y-axis movement plane (
vertical movement plane of the main axis). In addition, in parallel with the above, the tool 3 held in the spindle 4 is transferred to the dedicated tool magazine 1 by the action of the tool changer 2.

As shown above, the tool bar (F) is the rotary table B.
When the main shaft 4 is moved upward, the main shaft 4 descends along the Y axis and the main shaft 4
The tool stops when the center of the replacement tool 3 coincides with the center of the replacement tool 3 at the uppermost position of the replacement magazine 5, and the chuck in the main shaft 4 becomes open.

After that, the axis 4 moves forward along the Z axis, and the Yagajin single unit 7
One replacement tool 3 held in the uppermost tool holding mechanism 13 is grabbed. The main shaft 4, which has gripped the replacement tool 3, continues to rise along the Y-axis and reaches the normal automatic tool changing position, but at this time, the pawls 17 and 17 of the tool holding mechanism 13 compress the pinch spring 19 and move the shaft 18 to the center. Open it to remove the replacement tool 3. When this is completed, the tool changer 2 operates in a well-known manner, and loads the one replacement tool that was held onto the spindle 4 and taken out from the replacement tool magazine 5 into the special tool magazine 1, and also loads the replacement tool into the special tool magazine 1. The four tools to be replaced installed on the machine are taken out and held on the main spindle 4.

The main spindle 4 that has received the tool to be replaced from the tool changer 2 in this way is the magazine unit 7 from which the tool has been extracted.
After moving forward along the Z-axis directly above the empty tool holding mechanism 13, the tool is moved downward along the Y-axis and the tool is held in the claw 17.
17, the protrusion 17a is inserted into the bid holding groove 3a, and the tool holding mechanism 13 is made to hold the tool. At this time, the key groove formed in the seventh rung portion of the tool to be replaced and the detent key 13d of the tool holding mechanism 13 fit together. When the tool to be replaced is held in the tool holding mechanism 13, the
The spindle 4, which had been prevented from rotating in the circumferential direction, is now unlocked and moved to the left along the Z-axis in FIG. Move backwards and press the magazine unit 7.8 to release the fixing spring 2.
The fixing pin 23 is pulled out from the fixing hole 24a by moving it in the direction of the central axis 11 against the elasticity of the magazine 7.8.
Freely rotates in the circumferential direction. The above-mentioned movement of the magazine unit 7.8 by the main shaft 4 is performed via the tool to be replaced, but in this case, since the projection 17a of the claw 17 is fitted into the holding groove 3a of the tool, the Z-axis of the main shaft 4 The tool to be replaced will not be pulled out from the tool holding mechanism 13 due to the backward movement.

While holding the tool to be replaced, move backwards and insert it into the fixing hole 24, a.
The main shaft 4 from which the fixing pin 23 has been pulled out moves horizontally along the Y-axis while moving downward along the Y-axis (actually, the table base G moves in the X-axis direction. As a result, the main shaft 4 is substantially (The tool moves in an arc whose radius is the distance connecting the center of the center shaft 11 and the center of the tool to be replaced.) The replacement tool magazine 5 is rotated around the center shaft 11 and the next tool is assigned to the removal position. put out. At this time, the positioning roller 2 that had been fitted into the positioning grooves 14a and 15a of the guide ring 14.15
1 is detached from the positioning grooves 14a and 15a and the pressing portion 14
b, 15b and pushes the locking member 16 upward in FIG. 3 against the elasticity of the pressing spring 20, so that the outer end (the upper end in FIG. ．．
17, so that the tip side of the master mold 17.17 will not be accidentally opened and the tool to be replaced will not fall off while the magazine unit 7.8 is rotating. At the newly indexed tool take-out position, the next positioning roller 21 moves into the positioning groove 14.
a, 15a and temporarily fix the magazine unit 7.8 in that position. At this time, the outer end of the locking member 16 separates from between the root ends of the pair of claws 17.17, so
7 is unlocked to allow the replacement tool to be taken out from the tip side.

When the next replacement tool is placed in the removal position by performing a circular arc movement, the main shaft 4 moves forward along the two axes and inserts the fixing pin 23 into the fixing hole 24a. That is, the magazine unit 7.8 returns to the right in FIG. 2 due to the movement of the main shaft in the Z-axis direction and the action of the pressing fixing spring 22, and the fixing pin 23 is inserted into the fixing hole 24aK to stop free rotation in the circumferential direction. After that, the main shaft 4
clamps the chuck in the main shaft and retreats along the Z axis.

The above completes one tool exchange, but if many tools are to be exchanged, the above operation is repeated. When replacing the tool on the magazine unit 8 side, the quadri-tary table B is rotated 180 degrees to direct the magazine unit 8 toward the main shaft 4. However, in this case, the main shaft 4 is advanced and the fixing pin 23 is pulled out from the fixing hole 24&.

FIG. 5 shows another positioning mechanism in place of the fixing hole 24a and fixing pin 23, in which the S part 28 has two holes 28a and 128b drilled in an inverted T shape, and the bearing is attached to the boss 9a and 110I.
LK is fixed, and in one of the holes 281L, a fixing pin 29 having a roller 29m at its tip and a pressure-receiving protrusion 29b in the center is biased by a spring 30 toward the roller 291L (on the side of the support 12). A pressure pin 31 is inserted into the other hole 28b, and has a pressure pin 31 at its upper end and a pressure inclined surface 311 at its lower end.
When the main shaft 4 descends and moves the pressure pin 31 downward, the pressure inclined surface 31b presses the pressure receiving protrusion 29b and the fixing pin 29 resists the elasticity of the spring 300. Then, it is moved back to the left in FIG. 205, and the roller 291L is removed from the fixing hole (groove) 12a provided in the support body 12, thereby releasing the fixation of the replacement tool magazine 5.

In addition, in both the one embodiment of one set and the second embodiment shown in FIG. 5, the positioning mechanism is actuated either indirectly or directly by the movement of the main shaft 4.

Furthermore, the above description shows a case in which the present invention is applied to a machine tool equipped with an automatic worker changer that uses the tool changer 2 to perform normal tool changes between the dedicated tool magazine 1 and the spindle 4. However, the present invention is not limited to this, and can also be applied to a machine tool with an automatic tool changer that performs a normal tool change directly between the dedicated tool magazine 1 and the spindle 4 without using the tool changer 2. can.

As explained above, the replacement tool magazine of the present invention is
A magazine with a tool holding mechanism attached to the outer periphery of a nearly circular support body, which holds tools, is attached to a central axis that is rotatably installed in the circumferential direction of the frame of the tool pallet.
The center of the support body is aligned with the center of the central axis, and the tool holding mechanism is installed so that the direction in which the tool is held is approximately parallel to the central axis, and a fixing hole is provided in either the magazine unit or the frame, On the other hand, there is a fixing pin that is inserted into the fixing hole and stops the free rotation of the magazine when the main shaft that grips the tool moves, so it is equipped with a dedicated tool indexing device and drive device. The tool can be pulled out quickly and accurately without having to do anything. Further, in the case of the cross-pongee shown in the drawings of the present invention, the pair of single magazines 7 and 8 are arranged with the tool holding mechanisms 13 of each other shifted in phase by half a pitch and with a required interval. The tools held in the tool holding mechanism @13 of one magazine unit 7 and the tools held in the tool holding mechanism 13 of another magazine unit 8 do not interfere with each other. It has the advantage of being able to hold a large number of Furthermore, the heating tool magazine of the present invention has a configuration in which the fixing pin is inserted into the fixing hole to stop the free rotation of the magazine in the cylindrical direction, so that it cannot be held by the operator or the holder hw. Even if there is a bias on the mold side of the tool and a rotational moment is generated in the magazine itself, the magazine itself can be reliably prevented from rotating freely, and the fixing pin can be inserted and removed from the fixing hole easily. Since the movement is performed by moving the main shaft, there is also an advantage in that the structure can be simplified without requiring any other drive device.

[Brief explanation of the drawing]

Fig. 1 is a schematic plan view showing the relationship between the replacement tool magazine of the present invention and a machine tool, etc., Fig. 2 is a sectional view showing an embodiment of the replacement tool magazine of the invention, and Fig. 3 is a partially broken tool. FIG. 4 is a front view of the holding mechanism, FIG. 4 is a schematic front view of a pair of magazines, and FIG. 5 is a sectional view of another positioning mechanism. F... Tool pallet s Fl, Fl...
・Frame, 3...Tool, 4...Main shaft, 7.8...Magazine unit, 11...
Central axis, 12... Support body, 13... Tool holding mechanism, 13a... Claw holder, 17...
...Claw, 18...Pivot, 23...Fixing pin, 24 &...Fixing hole. Applicant: Niigata Co., Ltd. 1, Factory Diagram 5

Claims (1)

[Claims] A single magazine (8), which has a plurality of tool holding mechanisms (13) for holding tools (3) attached to the outer periphery of a substantially circular support (12), is attached to the frame (F_
1), (F_2), the center of the support body (12) is connected to the center axis (11) rotatably installed in the circumferential direction.
The magazine (8) and the frame (F_
A fixing hole (24a) is provided in either one of 2),
Furthermore, a fixing pin (23) is provided on the other side, which is inserted into the fixing hole (24a) and stops the free rotation of the magazine unit (8) when the main shaft (4) that grips the tool (3) moves. Features a replacement tool magazine.