JP2001129737A - Tool conveying device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tool conveying device having a function for chucking or unchucking a tool holder without using a tool pot or an actuator. SOLUTION: The tool holder is chucked and unchucked in interlocking with the operation for vertically moving a tool holder chuck part for conveying the tool holder in a chucked state.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a machine tool including a tool magazine in which a plurality of holding portions are linearly arranged with one holding portion opened in one direction. The present invention relates to a tool transfer device configured to perform chucking and unchucking of a tool holder in conjunction with an operation of moving a tool holder chuck portion up and down between a magazine mounting position and to transfer the tool holder in a chuck state.

[0002]

2. Description of the Related Art Conventionally, a so-called disk-shaped tool magazine has been employed in machine tools. This disk-shaped tool magazine has a state in which a plurality of retaining grooves for detachably holding a tool are radially opened on the disk-shaped outer periphery. However, in this conventional machine tool, since the tool magazine has a disk shape and has a holding groove on the outer periphery, a large space that cannot be used is formed in the center of the tool magazine, and the tool magazine and the machine tool are not used. There has been a problem that a tool changer for automatically performing tool change between the main shaft and the main shaft becomes large in size.

[0003] In addition, when a tool is exchanged with a tool magazine, the tool magazine is indexed and rotated to find an empty holding groove at a tool exchange position, and is exchanged with a new tool.
Thereafter, the tool magazine was indexed and rotated again, a new tool was indexed to an extraction position for tool exchange, and then taken out to the tool exchange position, whereby a tool exchange operation by the tool exchange arm was performed for the first time. . For this reason, the time required for the replacement becomes longer, and in any case, it is necessary to perform the tool replacement while the machine is stopped for work via the tool magazine. It could not be operated, which hindered the efficiency of machining operations.

As a solution to these problems, a machine tool equipped with a so-called linear tool magazine, a tool changer, and a tool loader is disclosed in Japanese Patent Laid-Open No. Hei 10-347.
No. 5 discloses this. In this machine tool,
The tool holder is mounted on the linear tool magazine while being stored in the tool pot, and the tool holder is transported by the tool loader while being stored in the tool pot.
Therefore, a large number of tool pots must be prepared, which increases the cost, and there is a risk that the tool holder will be detached from the tool pot due to centrifugal force when the tool pot is conveyed on a curve.

Therefore, as shown in FIG. 7, a tool holder Th is used without using a tool pot and using an actuator 51.
The thing which chucks is proposed. That is, when the slider 32 is moved upward,
The fluid (for example, hydraulic pressure) is supplied from the opening 52 of the cylinder 53 of the actuator 51 attached to the lower part of the actuator 51 by the member 50, and the fluid (for example, hydraulic pressure) is discharged from the opening 54 to move the piston rod 55 to the left in FIG. , The chuck claws 56A and 56B are closed, and the pins 57A and 57B are inserted into the holes 5 of the shank 58 of the tool holder Th.
9A and 59B are engaged and chucked, and the tool holder Th is detached from the holding member 9 and moved to the upper transfer position.

On the other hand, when the tool holder Th is lowered from the transfer position and mounted on the holding member 9 of the tool magazine 6, the slider 32 is lowered by the action of the motor 29 and the ball screw 34 to move the tool holder Th to the tool magazine. The piston rod 55 is moved to the mounting position and is mounted on the holding portion 7 (see FIG. 4). The fluid (hydraulic pressure) is supplied from the opening 54 and the fluid (hydraulic pressure) is discharged from the opening 52 to move the piston rod 55 toward the drawing. To the right to move the chuck pawl 56
By opening A and 56B, the tool holder Th is uncucked.

[0007]

However, this tool transfer device 14 'requires an actuator 51 in addition to the vertical movement of the slider 32, so that the cost is reduced as in the case of using the tool pot. Had a problem. Therefore, an object of the present invention is to solve the problems of the conventional tool transfer devices and to provide a low cost, highly safe and simple tool transfer device.

[0008]

The present invention employs the following means to solve the above-mentioned problems. That is, the invention of claim 1 provides a machine tool including a tool magazine in which a plurality of holding portions are linearly arranged in a state of being opened in one direction, wherein a tool transport position, a tool change position or a tool magazine mounting position are provided. The tool holder is chucked and unchucked in conjunction with the operation of moving the tool holder chuck part up and down between, and the transfer is performed in a chuck state,
The tool transfer device is characterized in that the tool change or the tool magazine mounting is performed in an unchuck state.

A second aspect of the present invention provides a machine tool including a tool magazine in which a plurality of holding portions are linearly arranged in a state of being opened in one direction. A rotating body that rotates around the rotation axis according to the locus of the cam, a guide rail that is provided perpendicular to the rotating body, a slider that is vertically movably engaged with the guide rail,
A moving guide attached to the slider, a driving unit for moving the moving guide up and down, and a tool holder chuck provided on the slider positioned below the moving guide; A tool transfer device characterized in that a tool holder is chucked or unchucked in conjunction with vertical movement. Furthermore, a third aspect of the present invention is the tool transfer device according to the second aspect, wherein the driving unit includes a motor and a ball screw.

[0010]

Embodiments of the present invention will be described below in detail with reference to the drawings. It should be noted that the drawings are merely for the purpose of explanation, and some modifications may be made without departing from the spirit of the present invention. FIG. 1 is a side view of a tool transfer device according to the present invention, in which a tool holder chuck portion 37 is lowered to place a tool holder Th on a holding member 9 of a holding portion 7 of a tool magazine 6 and unchuck to perform tool magazine. Mounting position H
1 shows a state in which it exists. FIG.
FIG. 1 is a schematic front view of FIG. 1 as viewed in the direction of arrow A, and FIG. 3 is a side view of the tool transfer device according to the present invention. Unlike FIG. 1, the tool holder chuck 37 checks the tool holder Th to transfer the tool. This shows what is present at the position H2.

In FIGS. 1, 2 and 3, the moving body 22 forming the lower part of the tool transfer device 14 has a guide 35
A and 35B are rails 19 and 19 laid on a base 20.
And is mounted on the base 20 by being saddle-mounted.

The nut 18 is fixed to the moving body 22,
A ball screw 8 is screwed into the nut portion 18, and the ball screw 8 is connected to a motor 11 shown in FIG. The rotation of the motor 11 causes the ball screw 8 to rotate, the nut 18 to move accordingly, and the moving body 22 to move in the direction perpendicular to the plane of the drawing.

The rotating member 24 is loosely moved by the moving member 22, and the cam 23 attached to the lower portion of the rotating member 24 is provided with a cam groove 23 of a cam plate 21 provided on the base 20.
A is engaged. The rotating body 26 includes the rotating body member 24.
, And is configured to rotate around a rotation shaft 25 fixed to the moving body 22 via a bearing (not shown). Note that the cam 23 may be provided directly below the rotating body 26 so that the cam 23 is engaged in the cam groove 23A.

A support column 27 is erected on the rotating body 26, and a guide rail 30 is mounted on a side of the support column 27. A slider 32 is mounted via the guides 31, 31 so as to be able to move the guide rail 30 up and down. A nut portion 33 serving as a movement guide is attached to an upper portion of the slider 32, and a motor 29 is provided on a motor base 28 on the top of the column 27. A ball screw 34 is connected to the motor 29,
The ball screw 34 also rotates by the drive of the motor 29, and the nut portion 33 moves up and down. The driving unit referred to in the present specification includes, for example, the motor 29 and the ball screw 34.
Indicated by In addition, examples of the driving unit include a cylinder type actuator using energy such as a fluid.

A tool holder chuck 37 is mounted below the slider 32. Sliding shaft 36
A and 36B are loosened by the upper part 46A and the lower part 46B of the main body 46 of the tool holder chuck part 37, and the chuck member 3
8. 44 is a spring, and the sliding shaft 36
Base portions 43A and 43B are provided below A and 36B. The base portions 43A and 43B are provided with a sliding shaft 36A,
When 36B is lowered, the contact portion 26 of the rotating body 26
A, 26B (where it comes into contact with the base 43B of the rotating body 26, not shown). Although the case of two sliding shafts has been described, one sliding shaft other than two sliding shafts may be used. Overall, two cases are preferable.

The chuck member 38 is provided with an upper chuck 45A having pins 39A, and the lower portion 46B of the main body 46 is provided with a lower chuck 45B having pins 39B. The pins 39A and 39B engage with the holes 40A and 40B of the shank 41 of the tool holder Th, respectively.

FIG. 3 shows that the tool holder chuck portion 37 is
Shows the case where the tool magazine is moved up from the tool magazine mounting position H1 to reach the height of the tool transfer position H2.
The case of shifting from the state of FIG. 3 to the state of FIG. 1 will be described. First,
When the ball screw 34 is rotated by the operation of the motor 29 and the slider 32 is lowered, the tool holder chuck 37
Is also lowered, and the base portions 43A and 43B are brought into contact with the contact portions 26A,
26A and the pin 39A of the upper chuck 45A attached to the chuck member 38 is inserted into the hole 40A of the shank 41.
Get off.

Further, the tool holder Th descends together with the main body 46 of the tool holder chuck part 37 and stops at the bottom 47 of the holding part 7, but the lower part 46B of the main body 46 is lowered as it is, and the pin 39B is inserted into the hole of the shank 41. 40B
And the state of FIG. 1 is obtained.

On the other hand, the case of transition from the state of FIG. 1 to the state of FIG. The rotation of the ball screw 34 raises the slider 32 to raise the tool holder chuck portion 37, and at the same time, the pin 39B of the lower chuck 46B
The upper chuck 45 is pressed downward by the elastic force of the spring 44, and the pin 39A engages with the hole 40A, thereby engaging the tool holder Th.
h is engaged by the pins 39A and 39B and shifts to the position H2 in FIG.

The transfer of the tool holder chuck 37 from the tool transfer position H2 to the tool change position and vice versa are performed in the same manner.

FIG. 4 is a side view of a processing machine, for example, a machining center to which the tool transfer device 14 according to the present invention is applied.
FIG. 5 is a plan view thereof, and FIG. 6 is a front view thereof. As shown in FIGS. 4 and 5, a column 2 is provided on a base 1 of the machining center so as to be movable in the front-rear direction and the left-right direction, and a spindle head 3 is supported on the column 2 so as to be vertically movable. A spindle 4 is rotatably supported by the spindle head 3, and a tool T such as a drill is detachably attached to a tip of the spindle 4. The spindle 4 rotates in a state where the spindle head 3 is disposed at a lower machining position indicated by a chain line in FIG. 4, and the column 2 moves with respect to the work on the table (not shown), and the tool T performs predetermined machining on the work. Is applied. 5 is a tool changing device.

A frame 15 comprising a vertical portion 15A and a horizontal portion 15B is erected on the base 1, and a tool changing device 5 is provided at an end of the horizontal portion 15B of the frame 15.
Of the tool change arm 5A
A is supported rotatably around an axis parallel to the axis of the main shaft 4, passing through the central portion in the longitudinal direction of A. Further, tool holding portions 16 and 17 are formed at both ends of the tool changing arm 5A, respectively.

In a state where the spindle head 3 is arranged at an upper position shown by a solid line in FIG.
And the tool T2 moved upward from the tool magazine 6 by the tool transfer device 14 and transferred from the tool transfer position H2 to the tool exchange position H3.
It is grasped by 6, 17 and is simultaneously detached and replaced.

The horizontal portion 15B of the frame 15 is provided with a tool magazine 6 in which a plurality of holding portions 7 are arranged in a straight line in a state where the holding portions 7 are opened in one direction as shown in FIG.
It extends in the axial direction of the main shaft 4. A key groove (not shown) (when there is a key in the tool holder) or a key (not shown) (when there is a key groove in the tool holder) is provided at the bottom of the holding portion 7 to prevent the tool holder from rotating. . Similar detents are achieved for the tool grips 16, 17 in FIG.

An auxiliary tool magazine 12 is provided behind the vertical portion 15A of the frame 15. The auxiliary tool magazine 12 is raised to the height of the tool magazine mounting position H1 via the chain 13 of the lifting device 10 by driving a lifting motor (not shown). The tool holder is taken up by the tool transfer device 14 in the manner shown in FIG.
The tool is transported while maintaining the height of the tool transport position H2. In addition, as described above, the transport is performed by the nut portion 18 screwed to the ball screw 8 rotated by the operation of the motor 11.
Is performed by moving rightward as viewed in the figure as shown in FIG.

Next, the operation of the tool transfer device according to the present invention will be described with reference to FIGS. In FIGS. 1 and 4, the tool transfer device 14 includes a tool holder chuck 3.
7 is moved to the right in FIG. 4 while being held at the height of the tool magazine mounting position H1, and stopped at the holding section 7 having the tool holder Th. In FIG. 1, the motor 29
The ball screw 34 is rotated by the operation described above, the nut portion 33 screwed to the ball screw 34 moves upward, and the slider 32 also moves upward.

As the slider 32 moves upward,
Lower chuck 45 attached to lower part 46B of main body 46
B rises, and the lower chuck 45B pushes the tool holder Th upward while the pins 39B are engaged with the holes 40B of the shank 41 of the tool holder Th. When the tool holder is further pushed up, the chuck member 3 is actuated by the action of the spring 44.
8, the pin 39A is engaged with the hole 40A of the shank 41, and the tool holder Th is
A, the user is moved upward while being securely checked by the lower chuck 45B, and is moved from the tool magazine mounting position H1 to the tool transport position H2.

Next, the tool transfer device 14 is transferred rightward in FIG. 4 while maintaining the height of the tool transfer position H2, and is stopped when it reaches above the tool changer 5 in FIG. Thereafter, in FIG. 6, the tool holder chuck 37 is lowered to move the position of the tool holder Th from the tool transfer position H1 to the tool change position H3, and at the same time, the main spindle 4
Is raised toward the tool changing arm 5A. Then, the tool T2 (tool holder) held by the tool transfer device 14 is held by the tool holding portion 17 of the tool changing arm 5A. On the other hand, a tool T1 (tool holder) attached to the spindle 4
Is gripped by the tool gripper 16 of the tool change arm 5A. At this time, the tool holder chuck portion 37 is anti-jacking the tool holder Th.

The tools T1 and T2 are each
After being gripped by 6, 17 the tool transfer device 14 and the spindle 4
Evacuation at the same time. Next, the tool change arm 5A is
Rotate by 0 ° so that tool T2 is located below and tool T1 is located above. Then, the tool transfer device 14
By moving the spindle 4 forward and returning to the tool change position H3 and the tool attachment position H4, respectively, the tool T2 is attached to the spindle 4 and the tool T1 corresponds to the tool transfer device 14. Further, by raising the tool holder chuck portion 37, lowering the main shaft 4, and rotating the tool change arm 5A by 90 °,
The tool change is completed.

Further, the tool T1 (tool holder), which has been moved to the height of the tool transfer position H2 (see FIG. 3) by the tool holder check portion 37, is still being checked by the tool transfer device 14 as shown in FIG. The tool of the tool magazine 6 is conveyed to the left, and the tool of the tool magazine 6 is the empty holding part 7 or the holding part of the auxiliary tool magazine 12 (when it is located at the same height as the tool magazine 6 and the tool is empty). And the tool holder chuck portion 37 is lowered from the state shown in FIG. 3 to the state shown in FIG.

When the tool holder chuck 37 is lowered,
As shown in FIGS. 1 and 2, base portions 43A and 43B of sliding shafts 36A and 36B are in contact with contact portions 26A of rotating body 26,
26B, the pin 39A of the upper chuck 45A is disengaged from the hole 40A of the shank 41, and when the tool holder chuck portion 37 is further lowered, the tool holder Th is moved to the holding portion 7.
Contacting the bottom 47 of the tool holder and the tool holder chuck 3
7, the lower chuck 45B is lowered, the pin 39B of the lower chuck 45B is disengaged from the hole 40B of the shank 41, and the tool holder and, consequently, the tool are placed in an anti-jack state, and are mounted on the tool magazine or the auxiliary tool magazine. In the above embodiment, the replenishment and removal of tools in the auxiliary tool magazine 12 (the lowermost position) shown in FIG. 4 is performed manually, but all other operations are performed in sequence. It is automatically controlled by control or the like.
Note that the auxiliary tool magazine 12 may be moved up and down manually.

[0032]

According to the first and second aspects of the present invention, since the tool holder is directly chucked and transported, no tool pot is used, and no actuator for chuck is used. As a result, the cost can be greatly reduced, and there is no danger of the tool pot falling off as compared with the case using a tool pot, so that a remarkable effect that the reliability is further improved is exhibited.

According to the third aspect of the present invention, in addition to the above-described effects, the slider on which the tool holder chuck is attached can be moved to a predetermined position accurately and surely, and thus the chuck and anti-jack can be accurately moved. It can be performed smoothly, and a remarkable effect that the reliability is further improved is exhibited.

[Brief description of the drawings]

FIG. 1 is a side view of a tool transfer device according to the present invention, showing a state in which a tool holder is anti-yacked.

FIG. 2 is a schematic front view of FIG. 1 as viewed in the direction of arrow A.

FIG. 3 is a side view of the tool transfer device according to the present invention, showing a state where the tool holder is being checked.

FIG. 4 is a side view of a machining center to which the tool transfer device according to the present invention is applied.

FIG. 5 is a plan view of FIG. 4;

FIG. 6 is a front view of FIG. 4;

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

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Base 2 Column 3 Spindle head 4 Spindle 5 Tool exchange device 6 Tool magazine 7 Holding part 8 Ball screw 9 Holding member 10 Elevating device 11 Motor 12 Auxiliary tool magazine 13 Chain 14 Tool transfer device 15 Frame 16 Tool holding part 17 Tool holding part DESCRIPTION OF SYMBOLS 18 Nut part 19 Rail 20 Base 21 Cam plate 22 Moving body 23 Cam 23A Cam groove 24 Rotating body member 25 Rotating shaft 26 Rotating body 26A Contact part 26B Contact part 27 Support column 29 Motor 30 Guide rail 31 Guide 32 Slider 33 Nut part 34 Ball screw 35A Guide 35B Guide 36A Sliding shaft 36B Sliding shaft 37 Tool holder check part 38 Check member 43A Base part 43B Base part 44 Spring 45A Upper check 45B Lower check 46A Upper part of main body 46B of main body Lower part 47 Bottom part of holding part 50 Member 51 Actuator 52 Opening 53 Cylinder 54 Opening 56A Check claw 56B Check claw 57A Pin 57B Pin Th Tool holder

Claims (3)

[Claims] In a machine tool including a tool magazine in which a plurality of holding parts are opened in one direction and arranged linearly, a tool is moved between a tool transfer position and a tool change position or a tool magazine mounting position. The tool holder is chucked and unchucked in conjunction with the operation of moving the holder chuck portion up and down, the conveyance is performed in a chuck state, and the tool exchange or tool magazine mounting is performed in the uncuck state. A tool conveying device characterized by the above-mentioned. 2. A machine tool including a tool magazine in which a plurality of holding portions are opened in one direction and arranged in a straight line, wherein a moving body and a cam are provided around a rotating shaft provided on the moving body. A rotating body that rotates according to the trajectory, a guide rail that is provided perpendicular to the rotating body, a slider that is vertically movably fitted to the guide rail, a moving guide that is attached to the slider, and the moving guide And a tool holder chuck portion provided on the slider located below the moving guide and the movement guide, and the tool holder is chucked in conjunction with the vertical movement of the tool holder chuck portion, or A tool transfer device configured to be unchucked. 3. The tool transfer device according to claim 2, wherein the drive unit comprises a motor and a ball screw.