JPS6028617B2 - Machine tool tool storage magazine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an auxiliary magazine added to increase the number of stored tools in addition to a tool storage magazine that is standardly attached to a machine tool such as a machining center.

Recently, with the diversification of workpieces processed by machining centers, the number of tools stored in tool storage magazines is increasing.

In addition, tool storage magazines can be broadly classified into shelf type, chain type, and disc type depending on their shape, but shelf type magazines have complicated controls for taking out and returning tools, and chain type magazines have a complicated structure. Due to problems such as the possibility of damage, a disk-type magazine with a simple structure is often used.

Therefore, if you try to store a large number of tools with a disk-type magazine, the disk will become huge. As a countermeasure to this problem, it is possible to increase the number of tools and increase the size by making the magazine in which the tool pots are arranged multi-layered. This prevents

However, there is a structural limit in trying to further increase the number of tools.

In view of these problems, the present invention provides a first
A second tool storage magazine (hereinafter referred to as auxiliary magazine) outside the machining machine equipped with a chain-type tool storage magazine.
By adding a tool exchange arm, the operation of the tool exchange arm can be selected from the two magazines under the control of the control device to enable tool exchange, and furthermore, by making it easy to exchange the auxiliary magazine, the magazine The present invention provides an auxiliary magazine for a machining center that can be used as a changer and can be loaded into a DNO line that processes various workpieces.

Furthermore, when the auxiliary magazine is moved, the driving part of the auxiliary magazine can be removed from the fixed side, thereby providing an auxiliary magazine with simplified piping and wiring. Embodiments of the present invention will be described in detail below with reference to the drawings.

As shown in FIGS. 1 and 2, an auxiliary magazine 3 is provided above a first tool storage magazine 2 provided on the side surface of a column of a machining center.

Further, a tool exchange arm is provided near each of the magazines 2 and 3 for exchanging tools.

- Also, the auxiliary magazine 3 is provided so as to be movable left and right toward the tool exchange arm 4. Also in Figure 2,
The tool exchange position of the first tool storage magazine 2 is P, and the tool exchange position of the auxiliary magazine 3 is P2.

That is, the tools called to the tool exchange positions P, , P2 of the respective magazines can be exchanged by one tool exchange arm 4.

The tool exchange arm 4 is disclosed in Japanese Patent Application Laid-Open No. 54-1634.
It is already known as 85. Figure 2 “In Figure S~
A first frame 5 constituting an auxiliary magazine 3 is fixed to an upper side surface of a first tool storage magazine 2 provided on the side surface of a column of a machining center. In the sectional view taken along the line A-A in the diagram shown in FIG. 5, a hydraulic motor 6 for stirring the chain of the auxiliary magazine 3 is provided at one end of the first frame 6.

Further, a guide rail 7 is fixed to the upper end surface of the first frame 5 in the longitudinal direction. (Fig. S) Furthermore, a guide 9 with a U-shaped groove 8 cut in the lower side surface of the first frame 5 is provided in parallel with the guide rail 7 with the groove 8 facing upward. The second frame body 5' supports a plurality of cam followers C, , C2, and C3 provided on the upper side surface of the second frame body 5' so as to be removable.

(FIGS. 4 and 6) Furthermore, in the second frame 5', the lower side of the guide rail 7 is provided with a cam follower C4 and a pad Pa to prevent the second frame S' from floating up. ing. (Fig. 4, Fig. 8) Also, both sides of the guide rail 7 are sandwiched between guide rollers G, , G2...○4 provided on the upper side of the second frame 5'. There is.

(FIG. 4) A plurality of rollers R, , R2 provided at the bottom of the second frame 5' are guided by U-shaped grooves 8 of a guide 9 provided at the bottom side of the first frame 5, and are rolled. They are movably engaged. (Fig. 6) On the other hand, a block B provided at the center of the side surface of the second frame 5' has a cam roller R for driving the auxiliary magazine.
is rotatably supported on the first frame 5 side.

(Fig. 6, Fig. 7) Also, in Fig. 10, the first frame 5
Inside, a drum cam D is rotatably supported by bearings J and J2 parallel to the floor surface.

Further, the drum cam D is connected to an output shaft M of an electric motor M provided on the side surface of the end of the first frame through a coupling Cp.

(FIG. 18) A cam roller R for driving the auxiliary magazine provided on the side surface of the second frame 5' is engaged with a groove of the drum cam D. (Figure 6 and Figure 7) That is, the second frame 5' is rotated by the rotation of the drum cam D which is engaged with the auxiliary magazine driving cam roller R provided on the side surface of the frame 5'. (FIG. 6) Furthermore, sprocket ball support shafts 10 and 81 are provided at both ends of the second frame 5', respectively.

(Figure S) In the second frame 5' of the auxiliary magazine 3, there is a drive shaft dragon fin at a position away from the tool exchange arm 4. Jujikimyo 1
1 is provided. (Figure 1, Figure 1) The drive shaft 1
The skin is fixed at right angles to a tension plate P provided on the side surface of the second frame 5'.

Furthermore, a coupling 16 is rotatably supported on the tension plate P parallel to the drive shaft IQ.The tension plate P is also fixed to the side surface of the second frame 5. It is attached with a bolt 23 through the block B' (Fig.
,,The elongation of Ch2 is adjusted with the bolt 23. On the other hand, it is provided coaxially and oppositely to the output shaft 12 of the hydraulic motor 6 provided on the first frame 5 and the coupling 16 .

Further, a biased D cam 13 is inserted into the output shaft 12 of the hydraulic motor 6 via a key 1 hook.

(Fig. 5) Further, one end of the eccentric cam 3 has a protrusion 5.
is provided.

A groove 16' that crosses the axis of the coupling 16 is cut in the end of the coupling 16, which is provided opposite to the eccentric arm 13. A protrusion at the end of the eccentric cam 13 is engaged with the groove 16'. (FIG. 5) Furthermore, at the tool loading position of the auxiliary magazine, it is parallel to the moving direction of the auxiliary magazine, allowing movement of the auxiliary magazine.

Further, a spool shaft 18 of a mechanical valve 17 for controlling the flow rate of oil supplied to the hydraulic motor 6 is in contact with the eccentric cam 13 at right angles to the sea bream core of the eccentric cam 13 via a roller.

Furthermore, a pinion gear 19 is provided on the side of the coupling 16 opposite to the hydraulic motor 6 side.

(FIG. 5) Two rows of sprocket wheels 20 are rotatably supported on the drive shaft 10 of the auxiliary magazine 3 via bearings 21, 21'.

Furthermore, a gear 22 is provided on the side surface of the sprocket wheel 20.
is fixed. The gear 22 meshes with the pinion gear 19 at the end of the coupling shaft. Furthermore, a sprocket wheel 20', which is the same as the sprocket wheel 20 of the drive shaft 10, is rotatably supported on a driven shaft 11 provided on the tool changing arm 4 side of the second frame 5' constituting the auxiliary magazine 3. There is.

(FIG. 5) Further, a block 24 is provided on the side surface of the second frame 5' constituting the auxiliary magazine 3 near the driven shaft 10.

(FIG. 4) A through hole 25 is bored in the block 24 so that the sprocket wheel 20' of the driven shaft 11 faces toward the teeth. (FIG. 14) Furthermore, an index pin 26 is slidably inserted into the through hole 25 of the block 24. (FIG. 14) Also, within the through hole 25, the index pin 26 is urged toward the sprocket wheel 20' by a spring 28 from behind the index pin 26.

(FIGS. 5 and 14) On the other hand, a cylinder 30 is inserted into a through hole 29 provided at the bottom of the first frame 5 perpendicularly to the floor surface.

(FIGS. 5 and 13) Alternatively, an engaging portion 32 is provided at the tip of the piston rod 31 of the cylinder 30, and a U-shaped groove 33 is cut into the outer periphery of the engaging member 32. (FIGS. 5 and 13) The block 241 is further provided with the index pin 26 at a position away from the index pin 26.
A through hole 34 is cut in a direction perpendicular to the hole. (FIG. 13) A spline shaft 35 is rotatably inserted into the through hole 34, and a swing arm 36 is inserted into the spline shaft 35.
is playing the drum.

Further, a pin 37 protrudes toward the engaging member 32 from the side surface of the end of the sowing arm 36 . Furthermore, the pin 37
is engaged with the U-shaped groove 33 of the predetermined engagement member 32. (
(Fig. 13) Also, an arm 3 is attached to the other end of the spline shaft 35.
8 is inserted, and a pin 39 protrudes from the side surface of the tip of the arm 38.

Further, as shown in FIG. 5, a groove 40 is cut in the center outer periphery of the index pin 26. Further, on the arm 38 side of the block 24, an elongated hole (x) into which the index pin 26 is inserted is provided at right angles to the hole 25 into which the index pin 26 is inserted. (FIG. 14) The pin 39 of the arm 38 passes through the long hole X and engages with the groove 401 of the index pin. (Figure 5, 14
(Figure) On the other hand, a gear 41 is fixed to the first frame 5 side of the sprocket 20' of the driven shaft 11.

Further, a through hole 42 is provided in the second frame 5' in parallel with the driven shaft 11. (Figure 5) The through hole 42
A shaft 44 is rotatably supported through bearings 43, 43'. Furthermore, a pinion gear 45 is provided at the end of the shaft 44, and the gear 45 meshes with the gear 41 of the driven gear 11. Further, a pulse generating dog 46 is provided on the opposite side of the shaft 44 from the pinion gear 45. (FIGS. 5, 11, and 12) A proximity switch 46' is supported by a bracket 47 provided at the bottom of the first frame 5', facing the pulse generating dog 46. .

(FIGS. 11 and 12) On the other hand, two rows of endless chains Ch, Ch2 are stretched between the sprocket wheels 20, 20' which are supported on the drive shaft 10 and the driven shaft 11.
Further, a plurality of pot supporting brackets 48, 48' are provided in pairs at equal intervals on the two rows of chains Ch, , Ch2. (FIGS. 5 and 9) Also, as shown in FIGS. 4 and 6, the endless chains Ch, , Ch2 are guided by guide rails 51, 52, and 53 at the top and bottom of the chains. The above is an explanation of the structure, and next, its operation will be described.

That is, as shown in Fig. 2, the first
The tools called to each tool calling position P and P2 of the tool storage magazine 2 and the auxiliary magazine 3 are exchanged by one tool exchange arm.

The operation of the tool changing arm 4 differs depending on whether the tool to be used in the next process is at P or P2, and the can control device is controlled. The tool called to the tool exchange position P of the first tool storage magazine 2 is exchanged with the tool on the spindle by the tool exchange arm 4 by known means.

(Figure 3-A) Next, the tool exchange position P2 of the auxiliary magazine 3
This section explains the operation when exchanging a tool that is called.

(Third view) That is, the auxiliary magazine 3 moves toward the arm 4 in order to insert the marking tool into the grip of the tool exchange arm 4, which is waiting in a position perpendicular to the floor surface.
(Fig. C) Through this movement, the tool called to the tool exchange position P2 of the auxiliary magazine 3 is transferred to the tool exchange position P2.
The grip part of the arm 4 is placed on the line of movement of the arm 4.

The tool exchange arm 4 holding the tool moves forward perpendicularly to the plane of the paper while maintaining the same posture, and pulls out the tool from the pot at the tool exchange position P2. (Figure 3-C) In this state, the auxiliary magazine 3 is retreated to its original position. (Fig. 3D) Subsequently, the tool gripped by the tool exchange arm 4 is exchanged with the tool on the main spindle by known means. - That is, the tool exchange arm 4 holding a used tool is standing by at a standby position with the arm moved forward perpendicular to the floor and perpendicular to the plane of the paper. During this time, the auxiliary magazine once returns to the retracted position, and the pot in which the used tool is to be stored is called to the tool exchange position P2.
In this state, the auxiliary magazine 3 moves toward the arm 4 again. (Figure 3-C) As the auxiliary magazine 3 moves, the empty pot 50 stops at a position behind the used tool held by the arm 4. Subsequently, the tool exchange arm 4 is retracted vertically toward the plane of the paper, and the used tool is stored in the empty pot.

The auxiliary magazine 3 then retreats to its original position again. (Figure 3-B) Next, the operation of the auxiliary magazine 3 will be described in detail.

That is, when a command to call up a tool to be used in the next process is given by the tape, the spool shaft 18 of the flow rate control valve 17, which presses the decelerating eccentric force 3 of the hydraulic motor 6, is activated by switching the valve (not shown). It separates from the biased D cam and allows the hydraulic motor 6 to rotate.

Therefore, ``50, 50' pots each storing a plurality of tools.
The chains Ch, , Ch2 that support the are driven by a hydraulic motor 6. (FIG. 5) By driving this chain, the pinion gear 45 meshing with the gear 41 of the driven shaft 11 rotates.

As the pinion gear 45 rotates, a pulse generating dock 46 provided at the end of the shaft 44 rotates. This dock 46
The pulse count and the forward/reverse direction of rotation are detected by the signal from the proximity switch caused by the rotation of the motor. (Figures 11 and 12)
That is, the sprocket wheel 20 of the drive shaft 10 has a coupling 16 that engages with the eccentric cam 13 via the protrusion 15, and a gear 22 that meshes with a pinion gear 19 provided on the coupling 16. is driven by. (FIG. 5) When the target tool, which is subsequently called by the tape command for tool exchange displacement P2, is closed half a pitch, the deceleration spool 18 of the hydraulic motor 6 assists the eccentric cam. Due to the contact of the spool 18, the amount of oil supplied to the hydraulic motor 6 is gradually reduced by the movement of the spool by the eccentric cam. Therefore sprocket wheels 20, 20
The rotation of ' is decelerated, and when the calling tool is called to the predetermined position P2, the rotation of the hydraulic motor 6 is stopped by switching a valve (not shown). (FIG. 5) At this time, the piston rod 31 is raised by the action of the cylinder 30 provided in the first frame 5 near the driven shaft 11. (Fig. 3) The swinging arm 36, which is engaged with the engagement part village 32 at the tip of the piston rod 31 via the pin 37, swings upward about the spline shaft 35. (FIGS. 3 and 14) With this swing, the arm 38 at the end of the spline 35 swings toward the sprocket wheel 20'. Peck the arm 38
The index pin engaged with the pin 39 abuts the tooth bottom of the sprocket wheel 20' via the roller 27. (FIGS. 13 and 4) Furthermore, the index pin 26 is held pressed against the sprocket wheel 20' by a spring 28. That is, the tools in the auxiliary magazine 3 are called and positioned at the tool exchange position P2 in the manner described above. Next, the drum cam D is rotated in a fixed direction by the electric motor M.

The roller R provided on the side surface of the second frame 5', which is engaged with the drum D by the rotation of the drum cam D,
It moves toward the tool exchange arm 4 together with the frame 5'.
During this movement, the projection 1 of the eccentric cam 13 of the hydraulic motor 6
The groove 16' of the coupling 16, which engages with the auxiliary magazine 3, is oriented in the direction of movement of the auxiliary magazine 3. Therefore, as the auxiliary magazine 3 moves, the projection 15 of the eccentric cam 13 that is engaged with the coupling groove 16' slides into and leaves the groove 16'. (FIG. 5) Further, as the auxiliary magazine 3 moves, the protrusion 37 of the swing arm 36 that is engaged with the sub-coupling portion 32 of the cylinder 30 for operating the index pin 26 is moved into the groove of the engagement member 32. Leaving 33rd. (FIGS. 13 and 14) That is, the auxiliary magazine 3 is moved toward the tool exchange arm 4 by the rotation of the drum cam D via the roller R that is engaged with the drum cam groove.

By moving the auxiliary magazine 3, the tool at the tool exchange position P2 is inserted into the grip part of the tool exchange arm 4. When inserting this replacement tool, the advancing speed of the auxiliary magazine 3 is reduced by a predetermined curve of the cam groove 0 of the drum cam D. (FIG. 10) Subsequently, the replacement tool is gripped by the tool replacement arm 4 and pulled out from the auxiliary magazine 3, and the tool is replaced from the main shaft by known means.

Next, the tool exchange arm 4 holding the used tool returns to the standby position. Next, the empty pot of the auxiliary magazine 3 in the retracted position is called up at P2 to store the used tools. In this state, the auxiliary magazine 3 moves forward again, and the empty pot indexed at P2 moves to the tool exchange arm gripping portion. Subsequently, the used tool is returned to the empty pot P2 by the backward movement of the tool exchange arm 4. Thereafter, the auxiliary magazine 3 returns to its original position by the rotation of the drum cam D.

With this restoring operation of the auxiliary magazine, each engaging member that has been disconnected from each drive source is reengaged. (Figure 5)
That is, the protrusion 3 of the swinging arm 36 for driving the index pin 26
7 and the engagement member 32, and furthermore, the protrusion 15 of the eccentric cam 13 of the output shaft 12 of the hydraulic motor 6 and the groove 16' of the coupling 16 engage, respectively.

(FIG. 5) When a tool is retrieved from the auxiliary magazine 3 by a tape command in this state, the index pin 26 resists the spring 28 due to the action of the sill 30 and separates from the sprocket wheel 20'. (FIGS. 13 and 14) When the index pin 26 is removed, the pot storing each tool is driven by the hydraulic motor 6, and the predetermined tool is called out by the above-mentioned means. That is, by providing the auxiliary magazine 3 as described above, it is possible to increase the number of stored tools, and furthermore, by being able to use it as a magazine changer, it is effective in that it is possible to respond to the diversification of processing worts. has.

Furthermore, when the auxiliary magazine is moved, each driving section provided on the fixed side is disengaged from the moving section, which is effective in that the piping can be fixed and simplified.

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]

Figure 1 is an overall front view of the machine tool, Figure 2 is an overall side view of the machine tool, Figure 3-A is a diagram of the tool called out at P, held by the tool change arm, The figure shows the tool called out at P2, Figure 3-C shows the tool called out at P2 inserted into the tool exchange arm grip by the advancement of the auxiliary magazine, and Figure 3-A shows the tool called out at P2. FIG. 4 is a side view of the auxiliary magazine of the present invention, and FIG. 5 is the A-A in FIG. 4.
Cross-sectional view, Figure 6 is a GG cross-sectional view of Figure 4, Figure 7 is a cross-sectional view of Figure 6.
Figure 8 is a cross-sectional view taken along line K-K in Figure 4, Figure 9 is a cross-sectional view taken along line N in Figure 8, Figure 10 is a cross-sectional view taken along line ○-○ in Figure 8, 11 is a sectional view taken along the line Q-Q in FIG. 5, FIG. 12 is a sectional view along arrow S in FIG. 11, FIG. 13 is a sectional view taken along U-U in FIG. A V arrow view is shown. In the figure, 1...column, 2...first tool storage magazine, 3...auxiliary magazine, 4...
...Tool exchange arm, 5...First frame, 5
'...Second frame body, 6...Hydraulic motor, 7.
...Guide rail, 8...Groove, 9...
・Guide, 10... Drive shaft, 11...
Driven shaft, 12... Output shaft, 13... Eccentric cam, 16... Coupling, 17...
...Flow control mechanical valve, 18...Spool shaft, 19...
...Pinion gear, 20, 20'... Sprocket wheel, 22... Gear, 26... Index pin,
28...Spring, 30...Cylinder, 32...
・Engagement part village, 40...Groove, 41...Gear, 45...Pinion gear, 46...Dock, 46'...Proximity switch ,48,48',
49, 49'""" Bracket, 5OG50'... Pot, 51, 52, 53, 51', 52', 53'... Guide rail, P... 7 Nension plate, P.
...Tool exchange position of the first tool storage magazine, P2...
...Tool exchange position of the second tool storage magazine, C,,C
2, C3, C4...Guide roller, R...
・Cam loaf for driving the auxiliary magazine, R. ,R2・”…
Roller, D...Drum cam, M...Electric motor, Cp...
・Coupling, day...Gripping part, ×...Elongated hole,
Ch,, Ch2... Endless chain. Fig. 1 Fig. 2 Fig. 3 State map Fig. 3-(0) Fig. 3 small) Fig. 3-0 Fig. Figure 6 Figure 7 Figure 10 Figure 14

Claims (1)

[Claims] 1. A machine tool with a tool changer, including a main spindle, a tool change arm having a grip for exchanging tools on the main spindle, and having two stopping positions, a standby position and a tool change position, on the conveyance path of the grip; a first tool storage device provided to set a tool changing position of the tool changing arm as a first tool changing position; and a first tool storage device provided so as to be movable back and forth so as to set a standby position of the tool changing arm as a second tool changing position. a second tool storage device, a drive device that drives the second tool storage device forward and backward, and a control device that drives and controls the tool exchange arm to two positions, a standby position and a tool exchange position. A tool storage magazine for a machine tool, characterized in that when exchanging tools in the second tool storage device, a second tool exchange position of the second tool storage device is moved to a standby position.