JPS5924936A - Replacer tool magazine - Google Patents

Abstract

PURPOSE:To provide a tool replacer magazine with simple construction, which does not require any spcially designed indexing device, by furnishing a location mechanism and a tool retaining machine in which indexing of the magazine is driven by operation of the spindle. CONSTITUTION:A replacer tool magazine 5 is fitted on a pallet F and transported to the center of spindle. The spindle with opened chuck operates in the direction of Z axis to grasp a new tool 3 in a tool retaining mechanism 13. When it operates at the next stage in the direction of Y axis, the pawl opens to get rid of the new tool. The spindle attains the tool replacement position, and when the replacement arm fits the used tool on the spindle, the pawl of the retaining mechanism is restituted and in which the tool is fitted. When the spindle thereafter operates in the direction of Z axis, single bodies of magazines 7, 8 are moved toward the center shaft 11 against the action of a spring 2, and a fixed pin 23 is drawn off from the fixation hole 24a to allow the magazines 7, 8 to rotate freely in the circumferential direction. Now rotational indexing will take place.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a replacement tool magazine for use in automatic machine tools.

Recently, many processing facilities (FMS) have been seen 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 in other cases, the raw soybean used in this equipment must be replaced when it reaches the end of its life, breaks, or if the object of processing changes.

The conventional method of replacing rock fishing tools is (→
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.

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

However, in the case of (a) above, the operating rate is low because it is necessary to stop the machine and replace tools, and it also requires human labor, so it is not possible to operate unmanned. There is.

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 requires a common tool for each magazine, which is not only uneconomical, but also requires a lot of energy to transport the magazine and load it into the machine tool, as well as positioning and clamping equipment, etc. for normal tool replacement. There are drawbacks such as requiring equipment other than the equipment, which is expensive and requires a large space.Furthermore, in the case of (0), equipment such as a sub-magazine transport indexing device, a loading device into the tool magazine of a machine tool, etc. is required, as mentioned above ←)
As in the case of , it is expensive and has the drawbacks of taking up a lot of space.

The present invention comprises a pair of single magazines each having a plurality of tool holding mechanisms on the outer periphery, the tool holding mechanisms of each other being shifted in phase by a half pitch, and mounted on a central axis facing each other with a required interval. Each magazine is equipped with a positioning member so that the tool holding mechanisms of both magazines can be positioned at predetermined index positions, solving the above conventional problems. To provide a replacement tool magazine capable of quickly and accurately indexing a tool to a predetermined position by operating the main axis of a machine tool without requiring an indexing device, and capable of holding a large number of long tools. With the goal.

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

FIG. 1 shows an overview of a replacement tool magazine 5, a machine tool A, etc. of the present invention.
This makes it possible to take out one tool 3 from the special tool magazine 1 and mount it on the main spindle 4, and also to remove the tool 3 from the main spindle 4 and return it to the special tool magazine 1.

An automatic pallet changer C is arranged in front of the rotary tape B of the machine tool A, and a work pallet E carried by an automatic guided vehicle or a tool barn F carrying a replacement tool magazine 5 of the present invention is mounted. can be sent onto the rotary table B through the automatic pallet changer C. Note that the machine tool A, rotary table B, auto nozalet changer C, etc. described above are well known.

Figures 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 barrel 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 the frames F1 and F2, and is movable in the axial direction together with the central shaft 11, and in the circumferential direction. It is rotatably installed. 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 boss 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 138, and is rotatably supported by the claw holder 13a by +*@is. An arcuate protrusion is formed on the inner periphery of the tip. A pair of claws 17.17 in which the claws 17a are formed, and the claw holder 13a.
held in a hole 13c drilled in the
A pinch spring 19 is installed between the root ends of the claws 17.17 and biases the distal ends of the claws 17.17 toward the closing side, and the distal ends of the pair of claws 7.17, and a detent key 13d fixed to the pawl holder 13a, and when the tool 3 is pushed between the pair of semi-circular pawls from the tip side of the pawl 17.17, the pair of pawls 17.17 will pinch. It is configured to rotate around a pivot 18 as a fulcrum against the elasticity of a spring 19, and to hold the tool 3 by fitting the protrusion 17a into a holding groove 3a provided in the tool 3. Further, the locking member 16 is slidably inserted in the axial direction into a plurality of holes 33 that are radially bored in a ring 12A fixed to the inner outer end surface of the support body 12 in correspondence with the positions of the claws 17. Ori,
The locking member 16 and the pawl holder 13a are biased toward the center of the central shaft 11 by a suppressing spring 20 provided between the locking member 16 and the pawl holder 13a, and rotate together with the support 12, so that the inner end (accurately To do this, the positioning roller 21) provided at the inner end is dropped into a pair of positioning grooves 14a115a provided in the guide ring 14.15 corresponding to the index position of the replacement tool magazine 5, and the outer end is The claws 17.17 of the tool holding mechanism 13 are removed from between the root ends to free the opening movement of the mold 17.17, and when the magazine unit 7.8 rotates relative to the guide i14.15, the guide ring 14.15 Pressing part 1 formed on the outer peripheral surface of
4b115b presses the positioning roller 21, and the outer end of the claw 1 is pressed as shown by the two-dot chain line in FIG.
It is inserted between the root ends of the claws 17.17 and prevents the claws 17.17 from opening and rotating.

Here, the pair of magazine units 7.8 are fixed to the right side in FIG. 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 moved between the boss 10a of the bearing 10 and the guide ring 1
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, and Free rotation about the shaft 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 every half pitch.
This constitutes a positioning mechanism that positions each tool holding mechanism 13 at a predetermined index position (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 weight 2 with its upper and lower planes parallel to the support weight 2.

12B is a housing fixed to one of the supports 12, and the support 12 is fixed to the central shaft 11 by a stopper 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.

Tool 3 prepared at the tool station is a tool baren)
It is held in a predetermined tool holding mechanism 13 of the replacement tool magazine 5 loaded in F. A computer that generally controls machine tools and the like stores the tool pallet store (replacement tool magazine IG), the tool black in the replacement tool magazine 5, and the tool code (the tools are given absolute codes). The tool barrel (F) waits in a pad storage room or the like until a replacement instruction is received from the computer.

When a replacement command is issued according to the machining schedule, the tool barrel (F) loaded with the replacement tool magazine 5 is placed on a heat-input conveyor and transferred to the autobalance chain of machine tool A.
It is carried to the pallet changer C and drawn into the automatic pallet changer C together with the spring 1 and the replacement tool magazine 5. When machine tool A is machining, the tool bar is used until machining is completed)
Wait on the Fake auto pallet changer C.

When the machining by the machine tool A is completed, the tool pallet F is transferred onto the rotary table 13 of the machine f't[mA, and then, for example, the magazine m body 7 side is directed toward the spindle 4, and the tool pallet F is moved to the center of the replacement tool magazine 5. can be made to coincide with the movement plane of the Y-axis of the machine tool control axis (vertical slider σr 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 described above, tool pallet F is transferred to rotary table B.
When it is moved upward, the main shaft 111 [14 descends along Yeh and stops when the center of the main shaft 4 and the center of the replacement tool 3 at the top position of the replacement magazine 5 coincide, and the main shaft 4
The inner chuck is open.

After that, the main shaft 4 moves forward along the Z axis, and the Yagajin single body 7
One replacement tool 3 held in the uppermost tool holding mechanism 13 is grabbed. The main shaft 4 that has gripped the replacement tool 3 moves up along the Y-axis and reaches the normal automatic tool changing position, but at this time the claws 17 and 17 of the tool holding mechanism 13 compress the clamping spring 19 and move the pivot 18. Open in the center and 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. Take out one tool to be replaced attached to the main spindle 4.
Put it in your mouth.

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.
170, 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 spindle 4, which had been prevented from rotating in the circumferential direction until then, is unlocked, and the tool to be replaced inserted into the tool holding mechanism 13 is held in the spindle chuck. While holding the magazine, move backward along the Z-axis to the left in Figure 2, and press the magazine unit 7.8 to release the fixing spring 22.
The fixing pin 2 is moved in the direction of the central axis 11 against the elasticity of the
3 from the fixing hole 24a, and the magazine 7.8 is free to rotate 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.
In this case, since the protrusion 17a of the claw 17 is fitted into the tool holding groove 3&, the tool to be replaced will not be pulled out of the tool holding mechanism 13 due to the retreat of the main shaft 4 along the Z axis.

The main shaft 4 moves backwards while holding the tool to be replaced and pulls out the fixing pin 23 from the fixing hole 24a, and moves laterally along the It moves in the X-axis direction. As a result, the main shaft 4 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 moved along the center shaft 11 Rotate around the center to index the next tool to the removal position. At this time, the positioning groove 1 of the guide ring 14.15
The positioning roller 21 that had been fitted into the positioning grooves 14a and 15a is removed from the positioning grooves 14a and 15a, and the pressing portion 14bS
lsb and pushes up the locking member 16 upwards in FIG. 3 against the elasticity of the pressing spring 20, so that the outer end (the upper end in FIG. 2) of the locking member 16 engages the pair of claws 17, 17.
This prevents the tool to be replaced from falling off due to the distal end of the pattern 17.17 being inadvertently opened during rotation of the magazine unit 7.8. At the newly indexed tool take-out position, the next positioning roller 21 moves into the positioning groove 14a,
15a and temporarily fix the magazine unit 7.8 in that position. At this time, the outer end of the locking member 16 is connected to the pair of claws 1.
7.17, the claw 17.17 is unlocked and the replacement tool can be taken out from the distal end 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 Z-axis and inserts the fixing pin 23 into the fixing hole 24a. That is, the magazine unit 7.8 is returned to the right in FIG. 2 by 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 24a to stop free rotation in the circumferential direction. It will be done. Thereafter, the main shaft 4 unclamps the chuck within 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 rotary 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 241L.

Note that if a plurality of replacement tools are stored in the magazine unit 7.8 without uneven weight, and if an excessive rotational moment does not act on the magazine unit 7.8, the positioning of the four-legged member 16 21 and the positioning grooves 14a and 15a of the guide ring 14.15 weakly fix the magazine unit 7.8 to the frame F and function as an index positioning mechanism for the tool holding mechanism 13. Fixed bin 2 above
3 and the fixing hole 24a can also be omitted.

FIG. 5 shows another positioning mechanism in place of the fixing holes 24& and the fixing pin 23, in which a cylindrical member 28 with two holes 28a128b formed in an inverted T shape has a bearing on the boss 9aslQa.
The one hole 28a has a roller 2 at its tip.
9a and a pressure-receiving protrusion 29b in the center thereof is fixed by a spring 30 to the roller 29a side (support 12
A pressure bottle 31 having a roller 31a at the upper end and a pressing slope 31b at the lower end is urged upward by a spring 32. When the main shaft 4 is lowered and the pressure pin 31 is moved downward, the pressure inclined surface 31b touches the pressure receiving protrusion 2.
9b is pressed to move the fixing bottle 29 backward to the left in FIG. It is supposed to be unfixed.

In the above embodiment, the circular motion of the main spindle 4 is transmitted to the replacement tool magazine 5 through the tool, and the tool is indexed to a predetermined position. It is also possible to index tools by moving or rotating the change tool magazine 4 back and forth, left and right, up and down, or the like.

Furthermore, the above description shows a case in which the present invention is applied to a machine tool with an automatic tool changer that performs normal tool changes between the dedicated tool magazine 1 and the spindle 4 using the tool changer 2. However, the present invention is not limited thereto, and can also be applied to a machine tool equipped 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
Single magazine 7 equipped with a plurality of tool holding mechanisms 13 on the outer periphery
．． 8 is attached to the center shaft 12 built on the frame F11Ft of the tool pallet F, and the magazine m body 7.8 is moved by utilizing the X, Y, and Z axis movement functions originally possessed by the main shaft 4 of the machine tool. Since the tool can be rotated and indexed to a predetermined position, the tool can be indexed quickly and accurately without the need for a dedicated tool indexing device and drive device. In addition, in the present invention, the pair of magazine units 7 and 8 are arranged with the tool holding mechanisms 13 shifted from each other by half a pitch and with a required interval, so that the tool holding mechanisms 13 of the single magazine unit 7 The tool held in the mechanism 13 and the tool holding mechanism 1 of the other magazine unit 8
Since the tools held in the holder 3 do not interfere with each other, there is an advantage that a large number of long tools can be held. Furthermore, a positioning mechanism is provided between the magazine unit and the frame to ensure that the magazine unit is correctly held in a predetermined position, so the operation of inserting and extracting tools into and out of the magazine unit using the main shaft is safe. And it can be done accurately.

[Brief explanation of drawings]

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 fixing mechanism. F... Tool bullet F, , F2...
Frame, 3...Tool, 7.8...1 magazine, 11...Center shaft, 12...Support, 13...Tool holding mechanism, 13a...Claw holder, 17...Claw, 18...Pivot.

Claims (1)

[Claims] A plurality of tool holding mechanisms in which a pair of claws for gripping tools are rotatably attached to a claw holder on a pivot are arranged with the tip of the claw □, where the tool is inserted and extracted, outward, and L1 and the pivot. A pair of single magazines, which are attached to the outer shoe of the support with the rotating plane of the center pawl parallel to the support, are attached to a central axis that is rotatably installed in the circumferential direction of the frame of the tool pallet. The tool holding mechanisms are mounted facing each other with a half-pitch phase shift and a required interval, and each of the tool holding mechanisms is positioned at a predetermined index position between the magazine support and the frame. A replacement tool magazine characterized by being provided with a positioning mechanism for positioning the tool.