KR20040045223A - Automatic tool changing device of machining center - Google Patents

Abstract

PURPOSE: An automatic tool changing device of a machining center is provided to machine a workpiece without the completion of the tool return after installing a required tool at a main shaft. CONSTITUTION: An automatic tool changing device of a machining center is composed of a tool magazine(10) holding tools, a first tool changer(20) allowing the tool change to a main shaft of the machining center, a main body with a guide shaft and block positioned between the tool magazine and the first tool changer, a tool carrier for transmitting the tool to a tool gripper(11), a bracket hinged with the guide shaft, a first cylinder interlocked with the tool magazine, legs(33a,33b) allowing the bracket to rotate to the guide shaft, a second tool changer including a moving plate(35) having grooves(35a,35b) corresponding to the legs, and a second cylinder(36) turning the carrier to the guide shaft.

Description

Automatic Tool Changing Device Of Machining Center

The present invention relates to a tool changer capable of machining a workpiece even if the return process of the tool is not completed after mounting a tool of a desired shape with respect to the spindle mounted on the machining center. The tool magazine and the first tool changer which continuously change the tool of the spindle rotate clockwise with respect to the spindle so that the exchange can be made more quickly and easily, thereby minimizing the interference area with respect to the spindle. The tool changer is provided with a second tool changer for performing a series of tool clamping and unclamping operations, and relates to an automatic tool changer of a machining center for exchanging tools.

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.

Among these, the drum type is installed on the side and top of the machining center, and is mainly used as an automatic tool changer in a place where there is not enough space.

The drum type machining centers can be broadly divided into a separate type that is generally used when more than 40 tools (Tools) and a carrier and a tool lift of the most common form is added, and an integrated type that is mainly used when less than 20 tools.

Here, in the case of the integrated type, most of them are generally installed on the side of the machining center and, if necessary, may be installed on the column of the machining center.

In the case where the upper portion of the machining center is installed in the above, the width becomes a problem, and thus the technical problem of securing and maintaining the degree of the machine is difficult.

That is, since the installation position of the magazine and the tool changer is installed in the upper part of the machining center, the center of gravity is driven forward, so that even weight distribution is difficult throughout the machining center, which results in concentrated load in the first half of the lower part of the machining center. This takes

At this time, when the feed speed of the tool change shaft is high, the concentrated load is further increased at the lower portion of the machining center, thereby doubling the adverse effect of the machining center on the load.

Therefore, it is not suitable for the modern trend of reducing cycle time to meet increasing production.

In order to prevent this, there is a method of supplying a tool to the automatic tool changer while linearly moving the tool carrier up and down.

However, in order to avoid the problem of the main axis interference area, the magazine had to be installed high, resulting in an increase in the height of the equipment.

Therefore, an automatic tool changer of a machining center having a structure capable of overcoming the above problems should be developed.

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 process a workpiece without returning a tool to a magazine after a tool change is made to a spindle of a machining center. To provide an automatic tool changer for machining centers.

The second object of the present invention is to install a tool magazine on the upper side spindle of the machining center, and install a first tool exchanger and a second tool exchanger for exchanging tools of the spindle between the spindle and the tool magazine. It is to provide an automatic tool changer of a machining center that can change tools accurately and accurately.

The object of the present invention is a drum-type tool magazine 10 in which each of the different tools 12 are individually held and rotated;

The first consisting of the first change arm 21a and the second change arm 21b rotating about the change arm axis 21 so that the tool 12 is exchanged with respect to the main shaft 40 of the machining center 200. Tool exchange unit 20;

A body 31 positioned between the tool magazine 10 and the first tool changer 20 and having a guide shaft 31a and a guide block 31b;

The tool 12 of the tool gripper 11 is transferred to the first change arm 21a about the guide shaft 31a of the body 31 and rotated so as to be mounted on the main shaft 40. And a tool carrier (32) which continuously receives the tool (12) that is clamped and moved to the second change arm (21b) at 40 and transfers it to the tool gripper (11).

One side is connected to the side of the tool carrier 32 and the bracket 33 which is hinged to the guide shaft 31a through a central portion,

The other side is mounted on the other side of the body 31 so that the bracket 33 and the tool carrier 32 can move forward and backward with respect to the guide shaft 31a in conjunction with the rotation of the tool magazine 10. A first cylinder 34 connected to the bracket 33,

A first leg 33a and a second leg 33b connected to the other side so that the bracket 33 can be rotated about the guide shaft 31a;

The first and second grooves 35a and 35b corresponding in shape to rotate about the guide shaft 31a while the first and second legs 33a and 33b are selectively fitted. A second tool exchanger 30 having a movable plate 35 having a predetermined interval therebetween and fitted to the guide block 31b; And

Automatic tool exchange of a machining center, characterized in that the carrier 32 comprises a second cylinder (36) connected longitudinally to one side of the movable plate (35) to pivot about the guide shaft (31a) Achieved by the device.

The stopper 33C may be further provided at the side of the bracket 33 in the pivoting direction of the carrier 32.

In addition, the stopping block 31c may be further formed on the body 31 corresponding to the rotation line of the bracket 33 so as to correspond to the stopper 33c of the bracket 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 block diagram of an automatic tool changer of a machining center according to the present invention;

2 is a side view of the second tool changer of FIG. 1;

3 is a side view illustrating a state in which a second tool change unit performs a tool change operation with respect to the tool magazine according to FIG. 1;

4 is an operating state diagram of the second tool exchange unit according to the present invention.

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

10: Tool Magazine 11: Tool Gripper

12: tool 20: first tool changing part

21: change arm axis 21a: first change arm

21b: second change arm 30: second tool exchange part

31: body 31a: guide shaft

31b: Guide Block 31c: Stopping Block

32: tool carrier 33: bracket

33a: first leg 33b: second leg

34: first cylinder 35: moving plate

35a: first recess 35b: second recess

36: 2nd cylinder 40: main shaft

100: automatic tool changer 200: machining center

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

1 is a block diagram of an automatic tool changer of a machining center according to the present invention.

As shown in FIG. 1, the automatic tool changer 100 has a tool magazine 10 equipped with different tools 12 on the upper part of the main shaft 40 so that the tool 12 can be quickly changed. Located between the tool magazine 10 and the main shaft 40, the first tool exchange unit 20 and the second tool exchange unit 30 to move up or down in conjunction with the magazine 10 and the main shaft 40 ) Is located.

In the tool magazine 10, a plurality of tool grippers 11, in which respective different tools 12 are individually held, are continuously mounted along the circumferential direction.

The tool gripper 11 is composed of a total of 12, each divided by a 30 ° interval from the central axis, and is configured to rotate around the drive shaft by clamping different tools 12.

The tool magazine 10 is the second tool exchanger 30 while the tool 12 clamped to the tool gripper 11 is rotated according to the number of the tool 12 selected in the program code of the machining center 200. ) Will be stopped at the replacement position of the tool 12.

As such, when the tool 12 of the tool magazine 10 is stopped at the replacement position, the second tool exchanger 30 interlocked with the tool magazine 10 is positioned at the standby position and then rotates to the replacement position.

The second tool changer 30 clamps the tool 12 in a clockwise direction and then turns again counterclockwise to the tool 12 exchange position of the first tool changer 20 located below. Will stop.

Here, the first tool exchange unit 20 is symmetrically installed so that the main shaft 40 is included in the turning radius around the change arm shaft 21 so that the tool 12 is exchanged with respect to the main shaft 40 of the machining center. It consists of a 1st change arm 21a and a 2nd change arm 21b which rotate at an angle.

Therefore, the first tool changer 20 is pivoted in conjunction with the rotation of the second tool changer 30, thereby simultaneously clamping each tool 12 on both sides, which is the first change arm 21a. Silver clamps the tool 12 of the main shaft 40, and at the same time the second change arm 21b clamps the tool 12 of the second tool changer 30.

In addition, the first tool exchanger 20 rotates 180 ° again while clamping the tool 12 to both sides, so that the tool 12 of the main shaft 40 clamped to the first change arm 21a is replaced with the second tool. The tool 12 is unclamped to be clamped to the carrier 32 of the part 30 and clamped to the main shaft 40 of the tool 12 of the second change arm 21b. .

The first tool exchanger 20 for this purpose is located in a standby position in an unclamped state on both sides.

Therefore, since the main shaft 40 of the machining center 200 does not receive any interference in the process of performing the tool change, the workpiece can be immediately processed.

FIG. 2 is a side view of the second tool changer of FIG. 1, and FIG. 3 is a side view illustrating a second tool changer performing a tool change operation with respect to the tool magazine according to FIG. 1.

As shown in Fig. 2 and 3, the second tool exchanger 30 is located between the tool magazine 10 and the first tool exchanger 20, the guide shaft 31a and the guide A body 31 having a block 31b, a tool carrier 32 for clamping and unclamping the tool 12 clamped to the tool gripper 11 of the magazine 10, and the tool carrier One side is connected to the side of the 32 and the bracket 33 which is hinged to the guide shaft 31a through the central portion, the other side is connected to the other side of the body 31 and one side is connected to the bracket 33 And a first cylinder 34 having a function of moving the tool carrier 32 forward and backward, and a second cylinder having a function perpendicular to the first cylinder 34 to rotate the tool carrier 32. It consists of a cylinder 36.

The second tool exchange unit 30 is located behind the tool magazine 10.

Therefore, when the tool gripper 11 of the tool magazine 10 stops at the tool change position, the tool carrier 32 of the second tool changer 30 is advanced to the tool 12 of the tool magazine 10. Will be clamped.

In the above, the carrier 32 of the second tool exchanger 30 is advanced by the bracket 33 connected to the side so that the tool 12 of the magazine 10 is clamped.

The other side is mounted on the other side of the body 31 of the second tool exchanger 30 so that the bracket 33 and the tool carrier 32 can be lifted in conjunction with the rotation of the tool magazine 10. Is possible by the first cylinder 34 connected to the bracket 33.

In addition, the bracket 33 is one side is connected to the side of the carrier 32, the central portion is hinged to the guide shaft 31a of the body, the other side can be moved forward and backward with respect to the guide shaft (31a) It is made to be connected to the rod of the first cylinder 34 to.

In addition, the first cylinder 34 is hydraulically operated, and interlocked with the rotation of the magazine 10.

The bracket 33 is rotated so that the tool 12 clamped to the tool carrier 32 can be rotated back to the tool change position of the first tool change unit 20, which is the second tool change unit. It is possible by the second cylinder 36 inclined in the front of the (30).

The turning of the tool carrier 32 is possible by the linear movement of the second cylinder 36, which is possible by the first leg 33a and the second leg 33b integrally provided on the other side of the bracket 33. Do.

The first leg 33a and the second leg 33b are formed to be spaced apart from each other by 80 ° with respect to one side of the bracket 33.

The first leg 33a and the second leg 33b may be selectively fitted into and separated from each recess 35a and 35b of the movable plate 35 provided on the lower portion, thereby repeating the guide shaft 31a. It is made to turn around.

The movable die 35 is formed to correspond to the guide block 31b of the body 31 to be reciprocated in the axial direction of the second cylinder (36).

The movable plate 35 is guided on the guide block 31b and reciprocated up and down.

At this time, the movable plate 35 has a second cylinder 36 is connected to the rod along the longitudinal direction on one side.

Accordingly, the movable plate 35 is reciprocated on the guide block 31b according to the reciprocating motion of the second cylinder 36, and thus the shape corresponding to the respective recesses 35a and 35b. The first leg 33a and the second leg 33b of the bracket 33 are pivoted or rotated with respect to the guide shaft 31a while being fitted and separated.

At this time, the stopper 33c is installed on the side of the bracket 33 in the pivoting direction of the carrier 32, so that the tool can be accurately stopped at the tool changing position of the first tool changing part 20.

In addition, a stopping block 31c is provided at a portion of the body 31 corresponding to the rotation line of the bracket 33 so as to correspond to the stopper 33c of the bracket 33.

Therefore, the movable plate 35 is advanced on the guide block 31b by the reciprocating movement of the second cylinder 36. Accordingly, the bracket 33 is rotated in the clockwise direction so that the tool carrier 32 is rotated. 1 The tool change part 20 stops at the tool change position.

At this time, the stopper 33c provided on the side of the bracket 33 can stop the bracket 33 at the tool change position by the stopping block 31c provided on the side of the body 31. It is possible.

4 is an operating state diagram of the second tool exchange unit according to the present invention.

As shown in FIG. 4, the second tool changer 30 is waiting behind the tool magazine 10.

The tool magazine 10 rotates the tool 12 held by the tool gripper 11 according to the number of the tool 12 selected in the program code of the machining center 200 while the second tool changer 30 is rotated. Stop at the tool change position.

Then, the tool carrier 32 of the second tool changer 30 is advanced by the operation of the first cylinder 34 connected to the bracket 33, whereby the tool carrier 32 is the tool magazine 10. To clamp the tool 12.

At this time, the first leg 33a of the bracket 33 remains separated and the second leg 33b maintains the state coupled to the second recess 35b of the movable plate 35.

In conjunction with this, the second cylinder 36 pushes the movable die 35 connected to the other side to one side on the guide block 31b so that the bracket 33 rotates.

At this time, the first leg 33a of the bracket 33 is rotated and fitted into the first recess 35a of the movable plate 35, and the second leg 33b is inserted into the second recess 35b. Departure.

Therefore, the tool carrier 32 of the bracket 33 reaches the tool change position of the first tool change unit 20.

As described above, in the automatic tool changer 100 of the machining center, the second cylinder 34 and the first cylinder 36 are preferably hydraulic cylinders operated by hydraulic pressure.

The first leg 33a and the second leg 33b are formed at an angle of 80 ° with respect to the other side of the bracket 33, and the size of the bracket 33 or the second tool exchange. The angle may be changed depending on the scale of the part 30.

Accordingly, the size of the movable die 35 corresponding to each leg 33a and 33b of the bracket 33 may also vary, and the positions of the grooves 35a and 35b formed in the movable die 35 are different. It can also be different.

As described above, according to the tool changer of the machining center according to the present invention, the second tool changer functions as a medium for tool change between the first tool changer and the tool magazine, so that continuous tool change can be performed more quickly and simply. There are features that can be achieved.

In addition, even if the return process of the tool to be returned after the tool exchange is made to the spindle of the machining center, the interference to the spindle is not made, there is an advantage that the workpiece can be processed immediately.

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 (3)

A tool magazine 10 of a drum type in which each of the different tools 12 is individually held and rotated; The first consisting of the first change arm 21a and the second change arm 21b rotating about the change arm axis 21 so that the tool 12 is exchanged with respect to the main shaft 40 of the machining center 200. Tool exchange unit 20; A body 31 positioned between the tool magazine 10 and the first tool changer 20 and having a guide shaft 31a and a guide block 31b; The tool 12 of the tool gripper 11 is transferred to the first change arm 21a about the guide shaft 31a of the body 31 and rotated so as to be mounted on the main shaft 40. And a tool carrier (32) which continuously receives the tool (12) that is clamped and moved to the second change arm (21b) at 40 and transfers it to the tool gripper (11). One side is connected to the side of the tool carrier 32 and the bracket 33 which is hinged to the guide shaft 31a through a central portion, The other side is mounted on the other side of the body 31 so that the bracket 33 and the tool carrier 32 can move forward and backward with respect to the guide shaft 31a in conjunction with the rotation of the tool magazine 10. A first cylinder 34 connected to the bracket 33, A first leg 33a and a second leg 33b connected to the other side so that the bracket 33 can be rotated about the guide shaft 31a; The first and second grooves 35a and 35b corresponding in shape to rotate about the guide shaft 31a while the first and second legs 33a and 33b are selectively fitted. A second tool exchanger 30 having a movable plate 35 having a predetermined interval therebetween and fitted to the guide block 31b; And Automatic tool exchange of the machining center, characterized in that the carrier 32 comprises a second cylinder (36) longitudinally connected to one side of the movable plate 35 so as to pivot about the guide shaft (31a) Device. The method of claim 1, Automatic tool changer of the machining center, characterized in that the stopper (33C) is further provided on the side of the bracket (33) in the turning direction of the carrier (32). The method of claim 3, A stopping block 31c is further formed on the body 31 corresponding to the rotation line of the bracket 33 so as to correspond to the stopper 33c of the bracket 33. Tool changer.