JPH09108976A - Tool magazine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent interference, between a tool and a tool pot in a tool magazine and a machine tool or an automatic tool replacing device, to improve a tool storing density. SOLUTION: A tool pot is arranged in a second tool pot fitting plate 13b too near to the utmost to an automatic tool replacing device 80. The front end surface of the fitting plate 13b is a second plane, parallel to and moreover different from a first plane where another tool pot is arranged. In vertical row tools T, excepting four tools T in a lower stage position, the tools T in an upper stage position are arranged slipped by a distance (l) in a front position. Consequently, the interference with the replacing device 80 can be prevented to increase a tool storing density, and also to reduce the installation floor areas for a tool magazine and a machine tool.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a tool magazine. More specifically, the present invention relates to a tool magazine in which tool pot groups in a tool magazine are arranged on at least two different parallel planes to prevent interference with an automatic tool changer or the like and to improve the tool storage density.

[0002]

2. Description of the Related Art A tool magazine of a numerically controlled machine tool is a device for storing a plurality of tools. Numerically controlled machine tools such as machining centers and turning centers are equipped with an automatic tool changer for automatically changing tools, and change tools between a spindle and a tool magazine. Various types of tool magazines for storing a plurality of tools are known. Among them, it is known that the matrix type tool magazine can save space because the tool density can be made high.

The tool mounting surface of the conventional matrix type tool magazine, that is, the front end surface of the tool pot is arranged substantially in the same plane. Therefore, when the tool in the tool pot is gripped by a tool take-out device such as a tool transfer device for tool exchange, position control in a plane, in other words, 2
Since the desired tool can be gripped by controlling the position in the axial direction, there is an advantage that the tool can be taken out relatively easily.

On the other hand, for example, when the automatic tool changing device is arranged at the end position of the tool magazine, the tool pot or the tool in the vicinity thereof interferes with each other, so that the tool pot cannot be arranged in the vicinity of the automatic tool changing device. Further, even if the automatic tool changer is arranged on the machine tool, the same problem occurs. Further, it is clear that the tool magazine and the machine tool should be arranged as close to each other as possible in order to improve space efficiency such as floor area.

However, if the tool magazine and the machine tool are arranged close to each other, each part of the machine tool interferes with the frame of the tool magazine, the tool pot, the tool, and the like, so that they cannot be brought closer than a predetermined distance. After all, there is a limit to increasing the tool storage density of the tool magazine above a predetermined level.

[0006]

The present invention has been made under the technical background as described above, and achieves the following objects.

An object of the present invention is to provide a tool magazine having a structure capable of increasing the tool storage density.

Another object of the present invention is to provide a tool magazine which does not interfere with an automatic tool changer or a machine tool.

Still another object of the present invention is to provide a tool magazine having a structure capable of reducing the floor area of a factory.

[0010]

The present invention employs the following means to achieve the above object.

A tool magazine which is a device for accommodating tools and is arranged on a first plane in the tool magazine and in such a manner that the axial directions of the tools are parallel to each other and holds the tools. A group, and a plane that is different from the first plane in the tool magazine, is parallel to the first plane, and is arranged such that the axes of the tools are parallel to each other and holds the tools. A tool magazine comprising a second tool pot group.

It is preferable that the first tool pot group and the second tool pot group are arranged in a vertical and horizontal matrix.

Further, it is preferable that the first tool pot group or the second tool pot group is arranged at a position where it does not interfere with the automatic tool changer arranged near the tool magazine.

Further, it is preferable that the first tool pot group or the second tool pot group is arranged at a position where it does not interfere with a machine tool arranged near the tool magazine.

[0015]

Embodiments of the present invention will be described below. FIG. 1 is a front view showing a tool magazine according to an embodiment of the present invention, and FIG. 2 is a right side view of FIG. FIG. 3 (a),
(B) is an enlarged view of the guide rail portion of FIG. 2. FIG. 4 is a plan view of FIG. The tool magazine 1 is called a matrix type in which a plurality of tool pots 2 are arranged vertically and horizontally on a vertical surface. The magazine main body 3 forming the main body of the tool magazine 1 is a frame having a substantially rectangular shape.

A level adjusting bolt 4 is provided on the lower surface of the magazine body 3. The level adjusting bolt 4 is for adjusting the height of the magazine body 3 and maintaining the adjusted installation accuracy of the tool magazine 1. One end of the magazine body 3 is integrally connected to the bed 6 of the machining center 5. Linear guide rails 7, 7 are arranged and fixed in parallel above and below the magazine body 3.

The linear guide rails 7, 7 are guide rails for moving the tool carrying device 10 for taking out the tool from the tool magazine 1, storing and carrying the tool, in the lateral direction (left and right direction in FIG. 1). On the magazine body 3, a plurality of first tool pot mounting plates 13a are arranged in parallel in the vertical direction (vertical direction). On each of the first tool pot mounting plates 13a, a plurality of tool pots 2 are arranged at equal intervals in the vertical direction.

The respective first tool pot mounting plates 13a are arranged in substantially the same plane in the tool magazine 1. The planes of the front surface of the plurality of first tool pot mounting plates 13a and the planes parallel to the front planes are called the first planes in this example. The "group" used in the set of tool pots 2 of this example is a mathematical concept including one or more.

Of the first tool pot mounting plate 13a, the second tool mounting plate 13b arranged at the upper position of the automatic tool changer 80 side is the lower third tool pot mounting plate 1a.
It is provided in a direction away from the main shaft 81 of the machining center 5 by a dimension 1 (L) from 3c (see FIG. 2).
The front surface of the second tool pot mounting plate 13b is a plane parallel to and different from the first plane, and is referred to as a second plane in this example.

In the present embodiment, the lower third tool pot mounting plate 13c is flush with the first tool mounting plate 13a, that is, the first tool mounting plate 13a.
Although it is arranged on the same plane as the plane, it may be arranged on the same plane as the second plane, and, unlike the first plane and the second plane, it may be a third plane parallel to these planes. .
The second and third planes referred to in the present invention are not the planes at specific positions but the same concept as the above-mentioned first plane.

5 (a), (b) and (c) show the tool pot 2, FIG. 5 (a) is a front view, and FIG. 5 (b) is a line bb in FIG. 5 (a). FIG. 5C is a cross-sectional view taken along the line of FIG. A first tool pot mounting plate 13 a is fixed to the magazine body 3 with bolts 14 on the front surface of the magazine body 3. The tool pot 2 is fixed to the first tool pot mounting plate 13a with bolts 19. A flange 15 is integrally formed on the front end surface of the tool pot 2.

Since the flange 15 is fixed to the first tool pot mounting plate 13a, the second tool pot mounting plate 13b and the third tool pot mounting plate 13c by the bolt 19, the tool pot 2 is eventually mounted on the first tool pot mounting plate 13c. It is fixed to the front surface of the plate 13a or the like. A convex portion 15b is integrally formed on the rear surface of the flange 15. Convex portion 15b
Is inserted into the holes formed in the first tool pot mounting plate 13a, the second tool pot mounting plate 13b, and the third tool pot mounting plate 13c, and is positioned at a predetermined angle.

The flange 15 of the tool pot 2 has a convex portion 15
a is formed. The convex portion 15a is inserted into a key portion 46 (see FIG. 8) which is a groove formed in the tool T, so that the tool T
The tool shank 16 of tool T
It is maintained at the set angle position which is the rotation angle direction of. Therefore, the positioning of the tool shank 47 in the rotational direction is maintained even when the tool T is gripped by the swinging pawl 45 of the tool gripping pawl mechanism 43 when the tool T is exchanged for tool exchange.

Inside the tool pot 2 is a tool shank 1
A taper hole (tool mounting hole) 17 for inserting 6 is formed. The inlet 18 of the taper hole 17 is in contact with the tool shank 16, but is escaped so as not to contact the deep peripheral surface position of the taper hole 17. Tool T pull stud 21
Is attached to the tool spindle of machine tools such as machining centers.
When clamped, it is pulled in the axial direction and clamped on the main shaft 81.

The pull stud 21 is inserted into an engagement support hole 22 formed at the deepest portion of the tool pot 2. The center line O of the tool pot 2 and the tool T forms an angle θ with the horizontal line. The angle θ is 15 degrees in this embodiment, but is 10 to 10.
It may be about 60 degrees. Since the tool pot 2 forms an angle θ with respect to the horizontal, the tool shank 16 and the pull stud 21 can be connected to each other by inserting the tool shank 16 of the tool T into the tool pot 2 through the inlet 18 of the tapered hole 17 and the engagement hole 22. It is supported by the weight of the tool itself and will not come out.

That is, there is an advantage that it is not necessary to clamp the pull stud 21 or the like on the tool pot 2 because it does not come out due to its own weight. In addition, the key portion formed on the tool shank 16 is a convex portion 15 a formed on the tool pot 2.
And is positioned around the tool axis.

The frame 25 of the tool-carrying device 10 the tool-carrying device 10 is in the form of schematic U-shape. Slide blocks 26, 26 are arranged above and below the end of the U-shaped frame 25. The slide blocks 26, 26 are movable on the linear guide rails 7, 7. Therefore, the upper and lower sides of the frame 25 are guided by the linear guide rails 7, 7 and can move to the left and right in the illustration of FIG.

A drive motor 29 such as a servo motor is arranged at a lower position of the frame 25. Drive motor 2
A pinion 28 is fixed to the output shaft of the output 9 through a reduction gear mechanism. The pinion 28 meshes with the rack 27. The rack 27 is fixed to the magazine body 3. When the drive motor 29 is started, the frame 2
5 moves to the left and right (in FIG. 1) on the linear guide rails 7, 7.

A ball screw 30 is vertically arranged on the side surface of the frame 25. The upper and lower sides of the ball screw 30 are the bearing bases 3 having the bearings fixed to the frame 25 built therein.
It is rotatably supported by 1, 31. Ball screw 30
At the lower end of the drive motor 32 through the toothed belt transmission mechanism.
Output shaft. Linear guide rails 8 are arranged in parallel on both sides of the ball screw 30 on the side surface of the frame 25.

On the linear guide rails 8 and 8, an elevating table 34 (see FIG. 6) is vertically movable via four slide blocks 9 (shown by a dashed line at the lower moving end). It is arranged. The ball nut 7 is mounted on the lift 34.
6 is fixed, and the ball screw 30 is screwed into the ball nut 76. By activating the drive motor 32, the ball screw 30 is rotationally driven to move the lift table 3
4 is moved up and down on the linear guide rails 8, 8.

A slide block 73,
73 is fixed. Linear guide rails 74, 74 are movably provided on the slide blocks 73, 73. The linear guide blocks 74, 74 are movable bases 7.
5 is fixed. After all, the movable table 75 tilted by the angle θ from the horizontal line is movably arranged on the elevating table 34 (see FIG. 7).

By moving a second cylinder 70, which will be described later, the movable table 75 is moved to the linear guide rails 74, 74,
It is guided by the slide blocks 73, 73 to move on the lift table 34, and is driven with respect to the lift table 34 in the axial direction of the tool T. Two parallel guide rods 36, 36 are arranged on the movable table 75 via the bushes 35, 35 at an angle θ from the horizontal.
It is provided so that it can move freely in an inclined direction.

The rear ends of the guide rods 36, 36 are connected at both ends of a connecting member 37. The central portion of the connecting member 37 is connected to the tip of the piston rod 39 of the first cylinder 38. Since the main body of the first cylinder 38 is fixed to the moving base 75, the guide rods 36, 36 are driven back and forth with respect to the moving base 75. Guide rod 36, 36
The grip claw main body 41 of the tool gripping head 40 is fixed to the tip of the with a bolt 42.

Therefore, by driving the first cylinder 38, the tool T is pulled out from the tool pot 2 provided on the first tool pot mounting plate 13a and inserted. First cylinder 3
By driving 8, the tool T is pulled out from the tool pot 2 provided on the first tool pot mounting plate 13a and inserted.

Tool Grasping Claw Mechanism 43 FIG. 7 is a side view of the tool conveying device, FIGS. 8A and 8B are diagrams showing the details of the tool grasping claw mechanism 43, and FIG. 8A is a front view. Yes, FIG. 8 (b) is a side view of FIG. 8 (a). At the tip of the tool gripping head 40, a tool gripping claw mechanism 43 is provided.
It has. The tool grasping pawl mechanism 43 includes a fixed pawl 44 and a swing pawl 45 arranged so as to face the fixed pawl 44. Tool T
Key portions (key grooves) 46, 46 are formed at two locations on the. The key portion (key groove) 46 is a recess for positioning the tool T at a predetermined angular position in the direction around the axis of the tool T.

The swing claw 45 is used for the tool shank 1 of the tool T.
The tool shank 1 swings when gripping or releasing 6
The flange portion 47 of 6 is gripped or released. Swing claw 45
Comprises a first claw member 48 and a second claw member 49. The first claw member 48 and the second claw member 49 swing around the support shaft 50. The first claw member 48 is disposed between the claw bodies 51, 51 integrally formed with the fixed claw 44 and is swingably supported.

The other end of the first claw member 48 is provided with a spring member 55.
Is arranged, and the head portion 52 at one end portion of the first claw member 48 presses in the direction of coming into contact with the outer circumference of Ta of the V-shaped gripping groove of the flange portion 47. The intermediate convex portion 53 of the first claw member 48
While being gripped by the tool shank 16 of the tool T, is inserted into the groove of the key portion 46 and is in contact with one corner of the key portion 46.

The spring member 5 is provided at the other end of the second claw member 49.
6 is arranged, and the head portion 57 of the second claw member 49 is the key portion 4
It is inserted into the groove 6 and is in contact with the other corner of the key portion 46.
After all, the head 57 of the second claw member 49 and the first claw member 52
The tool T is angularly positioned by the intermediate convex portion 53. One end of the stopper pin 60 is provided near the other end of the first claw member 48 so that the stopper pin 60 can be engaged with the stopper pin 60, and the stopper pin 60 is provided so as to be relatively movable in the guide hole 41 a of the grip claw body 41.

The stopper pin 60 has a movable table 7 on one side.
5 is fixed near the guide portion 75a (not shown). Further, the other side of the stopper pin 60 is guided by a guide member 60 a provided on the grip claw main body 51. Further, when the tool gripping pawl mechanism 43 is at the forward position (tool gripping / gripping release position) which is the direction in which the piston rod 39 extends by the first cylinder 38, the first pawl member 48 and the stopper pin 60 are not engaged. First without matching
The claw member 48 is swingable around a support shaft 50.

The first claw member 48 is a spring member 55.
Although it is always urged in the gripping direction by the tool T, when it is radially inserted into the flange portion 47 of the tool shank 16 of the tool T, it swings against the urging force of the spring member 55 and the fixed claw 4
The grip groove Ta of the tool shank 16 is gripped in cooperation with 4 and the like.

After gripping the grip groove Ta of the tool shank 16 of the tool T, the piston rod 39 is moved to the retracted position, which is the direction of contraction, to move the tool shank 16 of the tool T from the tool pot 2 in the A direction (see FIG. 7), the first claw member 48 and the stopper pin 60 engage with each other, and the stopper pin 60 regulates the swing of the first claw member 48. That is, the swinging claw 43 of the tool gripping claw mechanism 43 is restricted from swinging in the unclamping direction [clockwise direction in FIG. 8A], and the tool T is moved even if the tool transfer device 10 moves at high speed.
The gripped state is maintained stably, and the tool T does not jump out from the tool gripping claw mechanism 43.

In the second cylinder 70 shown in FIG. 7, the cylinder body is fixed to the moving table 75, and the piston rod 71 is connected to the connecting section 72 formed on the elevating table 75. When operating the tool gripping head 40, when the stroke of the first cylinder 38 is not sufficient, that is, when the tool T held in the tool pot 2 of the second tool mounting plate 13b is pulled out and inserted, the first The second cylinder 70 is operated together with the cylinder 38 to drive the tool gripping head 40. As shown in FIG. 2, the tools T in the tool magazine 1 are stored vertically aligned from the upper stage to the lower stage.

As described above, the most automatic tool changer 80
The second tool pot mounting plate 13b close to
Is arranged. The front end surface of the second tool pot mounting plate 13b is a plane parallel to and different from the first plane, and is referred to as a second plane in this example. The tools T in the tandem, except for the four tools T on the third tool pot mounting plate 13c in the lower position, are located at the front position (the left side in FIG. 2) by a distance l.
(Ell) It is arranged with a shift. This is to prevent interference with the automatic tool changer 80.

The automatic tool changing device 80 is for changing the tool T between the tool spindle 81 of the machining center 5 and the tool magazine 1. The transfer body 86 of the automatic tool changer 80 can be swung about the turning central axis 85 by an angle θ. The transfer body 86 is provided with a twin arm 87 for automatically exchanging the tool T by grasping the tool T and rotating it by 180 degrees.

Automatic Tool Changer 80 (Operation of First Embodiment) Next, the operation of the first embodiment will be described. First, the operation of selecting, extracting, and inserting the tool T in the tool pot 2 of the first tool pot mounting plate 13a will be described. In this case, the piston rod of the second cylinder 70 is driven in the contracting direction (solid line in FIG. 7). When a command to take out the tool T is issued from the tool magazine 1, the control device (not shown) issues a command to the tool transfer device 10 so as to move to the position where the tool T is stored. This command drives the drive motor 29 to rotate the pinion 28 of its output shaft. Since the pinion 28 meshes with the rack 27, it drives the frame 25 of the tool transfer device 10 left and right along the linear guide rail 7.

At the same time, by this command, the drive motor 32
Is activated to rotate the ball screw 30 and drive the elevating table 34 upward or downward. The piston rod 39 of the first cylinder 38 is moved forward in the extension direction. When a predetermined tool T is selected by driving the drive motor 32 in the vertical direction, the drive motor 29 is driven next, and the tool gripping claw mechanism 43 is driven.
The tool T can be held only by inserting the tool T into the flange portion 47 of the tool T.

That is, the swing claw 45 swings around the support shaft 50, and the first claw member 48 and the second claw member 49 swing to grip the flange portion 47. The tool T in the tool pot 2 of the first tool pot mounting plate 13a is pulled out,
The operation of inserting the piston rod 71 of the second cylinder 70
Is driven in the reduction direction (the state shown by the solid line in FIG. 7). The piston rod 39 of the first cylinder 38 on the moving base 75 is moved backward in the contracting direction to guide the two guide rods 36, 36 to the bush 35 and drive them. The tool gripping head 40 provided with the tool gripping claw mechanism 43 is
The tool shank 16 and the pull stud 21 are removed from the tool pot 2.

The tool gripping claw mechanism 43 includes a first cylinder 38.
When the tool is moved in the pulling-out direction by the backward movement in the contraction direction, the first claw member 48 and the stopper pin 60 are engaged with each other, and the first claw member 48 is prevented from swinging in the grip release direction. . When this extraction is completed, the frame 25 is driven to the position of the temporary holding pot 82. The tool T is inserted into the temporary holding tool pot 82 arranged in the automatic tool changer 80 by the reverse operation of the extraction operation of the tool T.

When the tool T is inserted into the tool pot 2 from the temporary holding tool pot 82, the tool transfer device 10 is operated in the reverse order of the above. When the tool T of the first tool pot mounting plate 13a in another column is selected, the movement space portion 13 at a position where the tool pot 2 is not arranged is selected.
The lifting table 34 is moved to c, 13c .... The tool T and the tool gripping head 40 do not interfere at the position of the moving space portion 13c.

When the tool T of the tool pot 2 of the upper second tool pot mounting plate 13b on the side of the machining center 5 is selected, the gripping position of the tool T is different, so the second cylinder 7
The moving table 7 is driven by driving the piston rod 71 of 0 in the extension direction.
5, the position of the first cylinder 38 and the like (from the solid line position in FIG. 7 to the two-dot chain line position) is changed. By operating the first cylinder 38 at this changed position, the tool T of the first tool pot mounting plate 13a can be extracted and inserted by the same operation as the tool T of the first tool pot mounting plate 13a. To do.

When the tool T pulled out from the tool pot 2 of the second tool pot mounting plate 15b is momentarily inserted into the holding pot 82, the piston rod 71 of the second cylinder 70 is reduced and the piston of the first cylinder 38 is moved. In order to move the rod 39 in the extension direction and return the tool extracted from the temporary holding pot 82 to the tool pot 2 of the second tool pot attachment plate 15b, the second cylinder 70 is in the extension direction and the first cylinder 38 is in the reduction direction. Move to.

The second tool pot mounting plate 13b on the side of the automatic tool changer 80 projects by a l dimension, but since the tool transfer device 10 does not pass through this position, the tool transfer device 10 is enlarged. It is possible to prevent the interference between the automatic tool changer 80 and the tool magazine 1 without performing the above.

(Other Embodiments) Although the automatic tool changer 80 of the above-described embodiment was provided in the magazine body 3 of the tool magazine 1, the automatic tool changer 8
0 may be fixed to the machining center 5. Further, an independent frame may be arranged between the tool magazine 1 and the machining center 5, and the tool magazine 1 may be arranged in this frame.

Further, in the above embodiment, the tool pot 2
Are arranged on the first plane and the second plane, but they may be arranged on a third plane which is different from the first plane and the second plane and is parallel to them. In the above embodiment, the tool magazine 1 has the tools T arranged in a matrix. However, this arrangement of tools may be other arrangements. In the above embodiment, the pull stud portion is engaged and supported,
It may be supported only by the tool shank.

[0055]

As described in detail above, according to the present invention, since the tool pots arranged in the tool magazine are arranged on a plurality of parallel planes, the tool storage density can be increased. In addition, the installation floor area of the tool magazine and machine tool can be reduced.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of a tool magazine of the present invention.

FIG. 2 is a right side view of FIG. 1;

FIG. 3 is an enlarged view of a guide rail portion of FIG.

FIG. 4 is a plan view of FIG.

5 (a), (b), and (c) show a tool pot, FIG. 5 (a) is a front view, and FIG. 5 (b) is FIG.
It is sectional drawing cut | disconnected by the bb line | wire of (a), and FIG.
FIG. 6 is a sectional view taken along line cc in FIG.

6 is a cross-sectional view of the tool transfer device when cut along line VI-VI in FIG. 2.

FIG. 7 is a side view of the tool transfer device.

8A and 8B are diagrams showing details of the tool gripping pawl mechanism, FIG. 8A is a front view, and FIG.
FIG. 9 is a side view of FIG.

[Explanation of symbols]

 1 ... Tool magazine 2 ... Tool pot 3 ... Magazine main body 5 ... Machining center 10 ... Tool transport device 13 ... Tool pot mounting member 25 ... Frame 30 ... Ball screw 34 ... Elevating table 43 ... Tool gripping claw mechanism 45 ... Swing claw 48 ... 1st nail | claw member 49 ... 2nd nail | claw member 51 ... Grip nail | claw main body 75 ... Moving base 80 ... Automatic tool changer 86 ... Transfer body

Claims (4)

[Claims] 1. A tool magazine, which is a device for accommodating tools, which is arranged on a first plane in the tool magazine and in which the axial directions of the tools are parallel to each other, and which holds the tools. A tool pot group, a second plane that is different from the first plane in the tool magazine and that is parallel to the first plane, and is arranged such that the axes of the tools are parallel to each other; A tool magazine comprising a second tool pot group to be held. 2. The tool magazine according to claim 1, wherein the first tool pot group and the second tool pot group are arranged in a vertical and horizontal matrix form. 3. The tool magazine according to claim 1 or 2, wherein the first tool pot group or the second tool pot group is located at a position where it does not interfere with an automatic tool changer arranged near the tool magazine. A tool magazine characterized by arranging. 4. The tool magazine according to claim 1, wherein the first tool pot group or the second tool pot group is arranged at a position where it does not interfere with a machine tool arranged near the tool magazine. A tool magazine that features