KR100428058B1 - A Tool Exchanging Device - Google Patents

Abstract

The present invention relates to a tool magazine and a tool boy device for storing a tool used in an ATC (Automatic Tool Changer) device in a machining center, and a tool magazine mounted on a sprocket and rotated horizontally with respect to the ground, and a change arm shaft. A first tool exchanger comprising a first change arm and a second change arm for exchanging a tool of the tool magazine and a tool of the main shaft while rotating symmetrically with respect to a center; a selected tool of the tool magazine and the tool changer And a second tool exchanger configured of a tool boy serving as an intermediate medium when the spindle tool is replaced.

Description

Tool Changer {A Tool Exchanging Device}

The present invention relates to a tool changer mounted on a machining center for selectively and continuously mounting a tool of a desired shape on a spindle, and more particularly, a tool magazine and a tool magazine for quick and easy tool change on the spindle. The tool boy and the tool boy which interlocks the rotation of the tool magazine and the change arm are installed between the change arms for continuously changing the tools of the spindle. will be.

Generally, tool magazines used in machining centers can be classified into two types, one being a drum type tool magazine and the other being a chain type tool magazine.

Hereinafter, the conventional drum type tool changer will be described with reference to the accompanying drawings.

1 is a plan view of a machining center including a conventional drum-type tool magazine, Figure 2 is a plan view showing the distance moved to the main axis around the axis of the conventional drum-type tool magazine, Figure 3 is a conventional drum Partial front view showing the lifting and lowering about the axis of the type tool magazine.

As shown in FIG. 1, the conventional tool changer 9 is a circular drum type tool magazine 1, and a predetermined number of tool grippers are formed on the outer circumference of the drum 1a constituting the tool magazine 1. (1b) to operate based on the program code input from the machining center.

The tool magazine 1 is rotated around a central axis driven by a driving means (not shown) so that the tool gripper 1b mounted on the outer periphery of the tool magazine 1 is the same as the main shaft 5. It stops on the horizon.

At this time, as shown in Figure 2, the tool magazine (1) is moved to the place designated as one side by the driving force of the driving means (not shown) in the central axis of the tool magazine (1) to move the tool gripper (1b) The tool 5a of the main shaft is held at.

In addition, as shown in FIG. 3, the entire tool magazine 1 is perpendicular to the main axis 5 in order to detach the tool 5a of the main shaft held by the tool gripper 1b of the tool magazine 1. It is lowered in phase to separate the main shaft 5 and the tool 5a.

Then, the tool magazine 1 is rotated to fit the selected tool 5a of the predetermined program on the position lowered from the main shaft 5 so that the selected tool 5a stops on the vertical line of the main shaft 5. do. As described above, the tool magazine 1 is raised to insert the tool 5a into the main shaft 5.

At this time, the tool magazine 1 is initialized by moving back to the central axis of the initial state as shown in FIG.

The conventional drum type tool changer configured as described above has a problem in that the entire tool magazine needs to be separated and replaced when many tools of different types are required because the tool gripper is mounted on the outer circumference of the drum.

In addition, the drum type tool magazine has a problem that the risk of safety accidents are scattered because the noise is large and the operation is large.

In addition, the drum type tool magazine takes up a larger space because the entire tool magazine moves and rotates when the tool in the spindle and the selected tool magazine are exchanged. As it becomes longer, there is a problem that the production efficiency is eventually reduced.

Accordingly, the present invention has been made in view of the above-described conventional problems, and a first object of the present invention is to provide a tool changer that allows a tool magazine tool to be exchanged more quickly and simply with respect to a main axis of a machining center. To provide.

The second object of the present invention is to provide a tool changer that can exchange tools more quickly and accurately by installing a change arm for exchanging a tool of the spindle between the spindle and the tool magazine and a tool boy that interlocks with the rotation of the tool magazine. It is.

These objects of the present invention, the drive shaft 11 connected to the drive means 50 (not shown), the drive sprocket 12 which is built up on the drive shaft 11, and the sprocket 12 of the drive sprocket 12 Tool magazine 13 for rotating the tool chain 13 corresponding to the number of teeth and the respective tool 15 for each tool gripper 14 of the tool chain 13 to rotate horizontally with respect to the ground. );

The first change arm 21a which is symmetrically installed so that the spindle 15 is included in the turning radius about the change arm shaft 21 so that the tool 15 is exchanged with respect to the machining center spindle 40. And a first tool exchange unit 20 formed of a second change arm 21b.

The tool 15 of the tool gripper 14 selected by lowering and interlocking with the rotation of the tool chain 13 is transmitted to the first change arm 21a to rotate to be mounted on the main shaft 40, and the main shaft 40 The tool port 31a and the tool port 31a which continuously receive the tool 15 which is separated from the tool 15 and moves to the second change arm 21b and transmit the tool 15 to the tool gripper 14 are guide shafts 33. A tool boy (31) comprising a first leg (31c) and a second leg (31d) connected to the bracket (31b) so as to pivot about the center,

The first cylinder 34 is installed on the upper portion so that the tool port 31a is raised and lowered about the guide shaft 33, and the first leg 31c and the second leg 31d are rotated while being selectively fitted. The first cylinder 32a and the second recess 32b corresponding to the shape of the movable die 32 having a predetermined interval and the second cylinder installed on the other side to reciprocate the movable die 32 It is achieved by the tool changer 100, characterized in that it comprises a; second exchange portion 30 made of (35).

In addition, the drive means 50 (not shown) is preferably a hydraulic motor using the hydraulic pressure as the driving force.

In addition, it is preferable that the first cylinder 34 and the second cylinder 35 use hydraulic pressure as a driving force.

In addition, the first leg 31c and the second leg 31d may be formed to have a constant angle with respect to the guide shaft 33.

Other objects, specific advantages and novel features of the present invention will become more apparent from the following detailed description and the preferred embodiments associated with the accompanying drawings.

1 is a plan view of a conventional drum type tool changer,

2 is a plan view of a tool changer showing a distance moved to a main axis about an axis of a conventional tool magazine;

3 is a partial front view of a tool changer showing lifting and lowering about an axis of a conventional tool magazine;

4 is a front view of a machining center including a tool changer according to the present invention;

5 is a plan view of FIG. 4 according to the present invention;

6 is a side view of FIG. 4 in accordance with the present invention;

7 is a front view of a second exchange unit including a tool boy according to the present invention;

8 is a flow chart of the operation of the toolboy with respect to the main shaft according to the present invention.

<Description of the symbols for the main parts of the drawings>

1: tool magazine 1a: drum

1b: Tool Gripper 3: Spindle

3a: Tool 9: Tool Changer

10: Tool magazine 11: Drive shaft

12: Sprocket 13: Toolchain

13a: roller link 14: tool gripper

15: Tool 16: Frame

20: first tool changing part 21: change arm axis

21a: First Change Arm 21b: Second Change Arm

30: second tool exchange part 31: tool boy

31a: Toolport 31b: Bracket

31c: 1st leg 31d: 2nd leg

32: movable plate 32a: first groove portion

32b: second groove 33: guide shaft

34: 1st cylinder 34a: piston rod

35: second cylinder 40: spindle

50: drive means 100: tool changer

Next, the present invention will be described in more detail with reference to the accompanying drawings with respect to a tool changer according to the present invention.

4 is a front view of a machining center including a tool changer according to the present invention, FIG. 5 is a plan view of FIG. 4 according to the present invention, and FIG. 6 is a side view of FIG. 4 according to the present invention.

4, 5 and 6, the tool changer 100 is divided into three parts, the tool magazine 10 is mounted to the sprocket 12 and rotates horizontally with respect to the ground, The first change arm 21a and the second change arm, which symmetrically rotate about the change arm axis 21 and exchange the tool 15 of the tool magazine 10 and the tool 15 of the main shaft 40 with each other. A tool of the main shaft 40 which is moved to the first tool changer 20, the tool 15 selected from the tool magazine 10, and the first tool changer 20 In the exchange of 15) is composed of a second tool exchange unit 30, which plays an intermediate role in the middle.

The tool magazine 10 is mounted on the sprocket 12 and mounted on the tool chain 13 corresponding to the number of teeth of the sprocket 12 and the tool chain 13 which rotates horizontally with respect to the ground. The tool 15 is composed of a plurality of tool grippers 14 which are individually held.

In addition, the sprocket 12 is installed on the drive shaft 11 connected to the drive means 50 and rotated, and about 12 teeth are formed on the outer circumference so as to be divided by 30 °. Therefore, the bite tool chain 13 of the sprocket 12 is continuously rotated at regular intervals by the number of teeth of the sprocket 12.

Here, the drive means 50 (not shown) is preferably a hydraulic motor used as a driving force hydraulically.

At this time, between about 24 roller links 13a constituting the tool chain 13, the same number of chains as the number of chains of the tool chain 13 so that the respective tool 15 can be held. Several tool grippers 14 are connected together, and the tool 15 held by the tool gripper 14 is rotated and stopped at an exchange position according to the number of the tool 15 selected in the program code of the machining center. do.

The tool magazine 10 as described above is very easy to expand, by increasing the number of the roller link 13a constituting the tool chain 13 by the number of tools (15) required, together with the tool gripper 14 to the roller The number of tools 15 can be increased by attaching to the link 13a.

At this time, the frame 16 for guiding the chain 13 is preferably divided into two frames 16 so as to be arbitrarily adjustable according to the number of the roller links 13a.

As described above, the tool boy 31 moves up and down on the vertical line of the tool 15 held by the tool gripper 14 in order to exchange and detach the tool 15 selected from the tool magazine 10. The first leg 31c and the second leg 31d are integrally formed at a predetermined angle so that the held tool 15 can be rotated within a predetermined angle range.

In addition, the second tool exchanger 30 includes the tool boy 31, and the tool boy 31 is connected to a guide shaft 33 fixed to one side thereof so that lifting and rotating can be performed. The first cylinder 34 is mounted vertically, and the second cylinder 35 is mounted horizontally on the other side.

In addition, the first tool exchange unit 20 may be connected to the tool boy 31 of the second tool exchange unit 30 so as to be interlocked with the first change arm 21a and the change arm shaft 21. The second change arm 21b is symmetrical with each other and is installed on the horizontal line at the same position as the tool port 31a which is lowered along the guide axis 33 to receive the tool 15 of the tool port 31a. do.

Accordingly, the first change arm 21a and the second change arm 21b are positioned at the same position as the tool 15 fitted to the main shaft 40 and the tool 15 mounted on the tool port 31 of the tool boy 31. You can rotate them on the horizon and exchange them.

In detail, when the rotating first change arm 21a rotates while holding the tool 15 of the main shaft 40, the second change arm 21b is the tool port 31a of the tool boy 31. As shown in FIG. When the tool 15 mounted on the holder is rotated and rotates in the same direction again in this state, the tool 15 of the main shaft 40 held by the first change arm 21a is connected to the tool port 31 of the tool boy 31. The tool 15 of the tool port 31a, which is transmitted to 31a and held by the second change arm 21b, is fitted to the main shaft 40.

In addition, the tool 15 of the main shaft 40 received by the tool boat 31a is mounted to the tool gripper 14 in which the tool holding is released.

7 is a front view of a second exchanger including a tool boy according to the invention, and FIG. 8 is a flow chart of the tool boy with respect to the spindle according to the invention.

As shown in FIGS. 7 and 8, the second exchange part 30 including the tool boy is vertically mounted to lift the tool boy 31 along the reciprocation of the piston rod 34a. The first cylinder 34 to be mounted, and the second cylinder 35 is mounted horizontally on the other side to rotate the tool boy 31 in accordance with the reciprocation of the piston rod (34a).

Here, the tool boy 31 is installed on the guide shaft 33 fixed to one side of the second exchange unit 30, and according to each reciprocation of each of the first cylinder 34 and the second cylinder 35 Lifting and turning is done.

The tool boy 31 is a tool port 31a which continuously receives the tool 15 which is separated from the main shaft 40 and moved to the second change arm 21b, and transmits the tool 15 to the tool gripper 14. The tool port 31a includes a first leg 31c and a second leg 31d connected to the bracket 31b to pivot about the guide shaft 33.

At this time, it is preferable that the first cylinder 34 and the second cylinder 35 use hydraulic pressure as a driving force.

The first cylinder 34 is vertically mounted to an upper portion of the second exchanger 30, and a piston rod 34a is connected to an upper side of the tool boy 31 to a lower portion thereof. The lifting and lowering of the piston rod 34a is made along with the reciprocating movement of the piston rod 34a.

At this time, the tool boy 31 is raised and lowered on a vertical line of the tool 15 held by the tool gripper 14 selected from the tool magazine 10.

In addition, the second cylinder (35) is horizontally mounted on the other side of the second exchange unit (30), and the first yaw of the movable die (32) connected to the piston rod (34a) of the second cylinder (35). The first leg 31c and the second leg 31d of the tool boy 31 corresponding to the groove portion 32a and the second recess portion 32b are rotated while being sequentially separated and coupled.

At this time, it is preferable that the first leg 31c and the second leg 31d are formed to have a constant angle with respect to the guide shaft 33.

Here, the first groove portion 32a and the second groove portion 32b of the movable die 32, and the first leg 31c and the second leg 31d of the tool boy 31 are the rack and the pinion. The first leg 31c and the second leg 31d are sequentially engaged according to the linear reciprocating movement of the movable die 32 so that the tool port 31a pivots about the guide shaft 33. As a result, the tool 15 of the main shaft 40 and the tool 15 of the tool gripper 14 held in the first change arm 21a may be exchanged while the tool port 31a is pivoted.

And, as shown in Figure 5, the operating sequence of the toolboy for the main axis according to the present invention is as follows.

First, the entire tool boy 31 descends along the guide shaft 33 so that the tool gripper 14 of the tool magazine 10 is coplanar with the holding position of the tool 15 of the tool gripper 14. The lowering operation of the tool boy 31 is performed by the piston rod 34a of the first cylinder 34.

At this time, the first leg 31c is engaged with the first groove portion 32a of the movable die 32 to maintain about 120 ° with respect to the main shaft 40.

Second, in accordance with the linear movement of the movable plate 32 connected to the piston rod 34a of the second cylinder 35, the first leg 31c and the second leg 31d of the tool boy 31 are sequentially When engaged with the first groove portion 32a and the second groove portion 32b of the movable plate 32 at the same time, it maintains about 60 ° with respect to the main shaft 40.

Third, according to the movement of the movable die 32 connected to the piston rod 34a of the second cylinder 35, the first leg 31c of the tool boy 31 is sequentially removed from the first recess 32a. And the second leg 31d is engaged with the second groove of the movable die 32 while the tool port 31a moves to the tool 15 replacement position of the first tool changer 20. It is moved.

Hereinafter, the operation procedure of the tool changer of the machining center will be described briefly.

The tool 15 mounted in the tool magazine 10 is stopped at the designated position by the program code input at the input unit.

When the tool boy 31 of the second tool changer 30 is lowered by the first cylinder 34 in conjunction with the tool magazine 10, the tool 15 of the tool gripper 14 is moved to the tool port. Is held in place.

The tool boy 31 is rotated by the piston rod 34a of the second cylinder 35 so that the tool 15 of the tool port is exchanged with the tool 15 of the main shaft 40. It is moved to the exchange position of the exchange unit 20.

The first chain arm 21a and the second chain arm 21b, which are mounted to the change arm shaft 21 so as to be symmetrical with each other, rotate. In this case, the first chain arm 21a is the tool 15 of the main shaft 40. ) And the second change arm 21b holds the tool 15 of the toolport 31a.

Thereafter, the first change arm 21a and the second change arm 21b are further rotated in the same direction while the first change arm 21a is placed on the tool port 31a of the tool 15 of the main shaft 40. The second change arm 21b transmits the tool 15 received from the tool port 31a, that is, the tool 15 held by the tool gripper 14 to the main shaft 40, and thus the main shaft ( The tool 15 of 40 is exchanged.

The tool port 31a holding the tool 15 used in the main shaft 40 delivers the tool 15 to the tool gripper 14 and is lifted up again by the first cylinder 34. Is initialized.

In the tool changer 100 according to the present invention as described above, the tool chain 13 of the tool magazine 10 is installed vertically in addition to being installed horizontally with respect to the ground, accordingly the tool boy 31 is also It can be installed vertically with respect to the ground.

The length of the tool chain 13 of the tool magazine 10 and the number of tool grippers 14 may be extended according to the size of the machining center.

As described above, according to the tool changer according to the present invention, the tool boy functions as a medium for tool change between the change arm and the tool magazine, so that continuous tool change can be performed more quickly and simply.

Accordingly, the tool change time in the production site is shortened, thereby increasing the production efficiency.

Although the present invention has been described in connection with the above-mentioned preferred embodiments, various other modifications and variations may be made without departing from the spirit and scope of the invention. Accordingly, it is intended that the appended claims cover such modifications and variations as fall within the true scope of the invention.

Claims (2)

A tool magazine 10 in which different tools 15 are individually held and rotated in respective tool grippers 14 of the tool chain 13; The first change arm 21a which is symmetrically installed so that the main shaft 40 is included in the turning radius so that the tool 15 is exchanged with respect to the machining center spindle 40 is rotated around the change arm shaft 21. And a first tool exchange unit 20 formed of a second change arm 21b. The tool of the tool gripper 14 selected in conjunction with the rotation of the tool chain 13 is transmitted to the first change arm 21a and rotated so as to be mounted on the main shaft 40, and is separated from the main shaft 40. The tool port 31a and the tool port 31a which continuously receive the tool 15 moved to the second change arm 21b and transmit the tool 15 to the tool gripper 14 are pivoted about the guide shaft 33. The tool boy 31 which consists of the 1st leg 31c and the 2nd leg 31d so that The first cylinder 34 and the first leg 31c and 31d installed in the upper portion so that the tool port 31a is elevated up and down about the guide shaft 33 are rotated while being selectively fitted. A movable cylinder 32 having a first recess 32a and a second recess 32b corresponding in shape, and a second cylinder installed on the other side to reciprocate the movable mold 32 And a second tool exchange unit (30) comprising (35). The method of claim 1, The first leg (31c) and the second leg (31d) is a tool changer, characterized in that formed to have a constant angle with respect to the guide shaft (33).