KR20170018575A

KR20170018575A - automatic tool changer

Info

Publication number: KR20170018575A
Application number: KR1020150112367A
Authority: KR
Inventors: 이준두; 남종우
Original assignee: (주)유지인트
Priority date: 2015-08-10
Filing date: 2015-08-10
Publication date: 2017-02-20

Abstract

The present invention relates to an automatic tool changer provided in a machine tool such as a machining center and capable of automatically changing a tool, and more particularly to an automatic tool changer having a drive unit installed horizontally on one side of a body to generate a driving force; A deceleration switching unit disposed on the inner side of the body to reduce the power input from the driving unit and change the power transmission direction in the vertical direction; A magazine shaft vertically positioned in the body and coupled to the decelerating switching unit and rotated; And a magazine assembly coupled to an upper end of the magazine shaft to mount a tool. Thus, the servo motor and the like can be configured in a state in which interference with other structures is minimized, Provides an effect.

Description

An automatic tool changer for a machine tool,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic tool changer provided in a machine tool such as a machining center and capable of automatically exchanging tools.

In general, machine tools are widely used for a wide variety of applications, including turning centers, machining centers, door machining centers, Swiss turn, electric discharge machines, and horizontal NC boring machines.

In particular, the machining center is a machine tool for automatically machining drilling, boring, milling, cutting, reaming, tapping, etc., in which various tools are arranged in circular magazines to exchange necessary tools in numerical control devices, It is processed automatically.

Since these machining centers must process various kinds of tools selectively for various types of automated machining, when the tool mounted on the main shaft completes machining for one process, An automatic tool changer (ATC) is indispensable to replace the tool housed in the tool magazine.

An automatic tool changer is divided into an arm type and an armless type according to a method of clamping a tool.

The armless automatic tool changer is mainly a vertical type machining center in which a plurality of tools provided on a magazine plate of a tool magazine are exchanged with only the movement of a column and a spindle without a separate change arm, Lt; / RTI >

However, in such an automatic tool changer, since the magazine plate is positioned in the horizontal direction and the drive sources such as the decelerator and the servo motor are vertically positioned in the vertical direction, the space utilization of the lower space is decreased, Motor or the like is often located inside the frame structure of the machining center, maintenance of the automatic tool changer is difficult due to the peripheral structure.

In addition, since a reducer and a servo motor are directly connected to a lower portion of the magazine plate, a considerable load is applied to the magazine plate side, thereby selecting the size (capacity) of the speed reducer and the servo motor, It is difficult to design and install an automatic tool changer.

KR Patent No. 10-1225189 KR Patent Publication No. 10-2011-0069933

SUMMARY OF THE INVENTION The present invention is conceived to solve the problems described above, and it is an object of the present invention to provide a servo motor and the like in a state in which interference with other structures is minimized by arranging a drive source The present invention also provides an automatic tool changer for a machine tool, which can be easily installed and maintained while equipment is in use.

According to an aspect of the present invention, there is provided an automatic tool changer for a machine tool, comprising: a driving unit installed on one side of a body in a horizontal direction to generate a driving force; A deceleration switching unit disposed on the inner side of the body to reduce the power input from the driving unit and change the power transmission direction in the vertical direction; A magazine shaft vertically positioned in the body and coupled to the decelerating switching unit and rotated; And a magazine assembly coupled to an upper end of the magazine shaft to mount a tool.

The body includes a base portion mounted on a main body frame of the machine tool, a switching portion on which the deceleration switching portion is provided on the base portion, a drive assembly portion on both sides of the switching portion, And a magazine supporter extending upward by a predetermined height in a cylindrical structure and having the magazine shaft and the magazine assembly installed above the switching driver.

It is preferable that a duct hole is formed in one side of the switching component and a duct cover is assembled in the duct hole.

Wherein the driving unit includes a driving shaft that is horizontally installed inside the body and that is rotated by a servomotor, the deceleration switching unit includes a driving cam that is mounted on the driving shaft and rotates, And a cam follower bearing mounted on the upper portion of the follower plate at a predetermined interval in the circumferential direction and meshed with the drive cam to transmit power.

The magazine assembly may include a magazine bracket assembled to the upper portion of the magazine shaft, a magazine plate assembled to the upper portion of the magazine bracket, and a tool holder installed around the magazine plate.

The body may include a magazine support portion that is vertically disposed at a predetermined height in a cylindrical shape and on which the magazine shaft is positioned, and the magazine bracket is formed to cover the outer side of the body with a skirt portion formed under the circumference thereof .

The above and other objects and advantages of the present invention will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings in which: In addition to the principal task solutions as described above, various task solutions according to the present invention will be further illustrated and described.

Since the automatic tool changer for a machine tool according to the present invention is configured to transmit power in the vertical direction through the deceleration switching unit in a state where the driving unit is positioned in the horizontal direction, it is possible to minimize the interference with other structures in the main frame of the machine tool The servo motor can be installed more easily. In particular, since most components such as the thermo motor are exposed to the upper part during the use of the mechanical equipment, the maintenance can be performed more easily.

1 is a front view showing an automatic tool changer for a machine tool according to an embodiment of the present invention.
2 is a right side view of an automatic tool changer for a machine tool according to an embodiment of the present invention.
3 is a left side view showing an automatic tool changer for a machine tool according to an embodiment of the present invention.
4 is a plan view showing an automatic tool changer for a machine tool according to an embodiment of the present invention.
5 is a cross-sectional view in the BB line direction of Fig.
6 is a cross-sectional view taken along the line AA of Fig.
7 is a perspective view of a body of an automatic tool changer for a machine tool according to an embodiment of the present invention.
8 is a cross-sectional view of a body of an automatic tool changer for a machine tool according to an embodiment of the present invention.
9 is a perspective view showing a coupling box of an automatic tool changer for a machine tool according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a front view, FIG. 2 is a right side view, FIG. 3 is a left side view, and FIG. 4 is a plan view of the automatic tool changer for a machine tool according to an embodiment of the present invention. . 5 and 6 are sectional views taken along the line B-B in Fig. 2 and in the direction of the line A-A in Fig.

1 to 6, an automatic tool changer for a machine tool according to an embodiment of the present invention includes a drive unit 30 installed horizontally on one side of a body 10, A deceleration switching unit 50 which is provided in the body 10 and changes the power transmission direction in a vertical direction in addition to the deceleration of the power inputted from the driving unit 30, And a magazine assembly 90 coupled to the upper end of the magazine shaft 70 and to which the tool is mounted.

The main components of the automatic tool changer for a machine tool according to an embodiment of the present invention will now be described in detail.

First, the body 10 is a structure mounted on a machine tool frame (not shown) such as a machining center to support the automatic tool changer.

7 and 8 are a perspective view and a cross-sectional view, respectively, of the body 10, showing a base 11 mounted on a main frame of the machine tool, and the decelerating switching part 50 provided on the base part 11 A drive assembling section 15 in which the drive section 30 is assembled in a horizontal direction on both sides of the switching section 13; And a magazine support portion 17 on which the magazine shaft 70 and the magazine assembly 90 are installed.

Here, it is preferable that the base portion 11 is formed with a plurality of bolt holes 12 so that the bolt B can be assembled to the body frame of the machine tool. The lower surface of the base portion 11 is configured to be opened to communicate with the switching component portion 13 and the lower cover 20 is assembled with the bolt 22 or the like so as to prevent the lower portion.

The switching component (13) has a housing structure having an internal space as a whole.

Particularly, the switching component 13 is provided with a duct opening 14 on the front side thereof, and the duct cover 25 is assembled to the duct opening 14. The construction of the duct 14 and the duct cover 25 is such that the mechanical components for power transmission such as the deceleration switching unit 50 are formed in the switching unit 13, So that maintenance can be easily performed.

5 and the like, the driving unit 30 includes a servo motor 31 positioned outside one side of the driving assembly 15 of the body 10, A driving shaft 39 extending horizontally inwardly of the body 10 and a driving shaft 39 extending from the inside of the coupling box 35 to the axis of the servo motor 31 And a coupling 37 connecting the drive shaft 39 and the drive shaft 39 to each other.

The servo motor 31 is preferably configured to output power through a gear box 32 which is formed in front of it and assembled to the coupling box 35. [

The coupling box 35 facilitates assembly and disassembly of the servomotor 31 and facilitates the maintenance of the coupling 37.

9 is a view showing such a coupling box 35. A flange portion 36 is configured to be assembled to the gear box 32 and the body 10 on both sides, The part has an open structure.

The drive shaft 39 is rotatably supported on the body 10 by bearings 40 and 41 at both ends thereof and a drive cam 51 of the deceleration switching unit 50, Respectively.

In FIG. 5, reference numeral 43 denotes an end cap for blocking the opposite side of the body 10 on which the drive shaft 39 is installed.

5 and 6, the deceleration switching unit 50 includes a driving cam 51 mounted on the driving shaft 39 and rotating as described above, and a driving cam 51 mounted on the lower end of the magazine shaft 70 A cam follower bearing 53 installed at a predetermined interval in the circumferential direction on the upper portion of the follower plate 55 so as to engage with the drive cam 51 and receive power, As shown in FIG.

The drive cam 51 has a helical cam groove 52 formed therein. When the drive cam 51 is rotated, the cam groove 52 continuously pushes the cam follower bearings 53 continuously arranged in the circumferential direction, and this action enables the follower plate 55 to rotate.

The deceleration switching unit 50 transmits the rotational power transmitted in the horizontal direction through the servo motor 31 to the vertical direction via the drive cam 51 and the cam follower bearing 53 and also transmits the rotational power through the drive cam 51 to the cam follower bearings 53, and at the same time, the deceleration is performed at the same time. This deceleration switching unit 50 basically uses the worm gear principle and constitutes a worm on the driving cam 51 without using the cam and the cam follower bearing and sets the gear teeth meshed with the worm on the follower plate 55 It is also possible to construct the worm wheel so as to switch the direction of power transmission and decelerate.

6 and the like, the magazine shaft 70 is vertically installed in the magazine supporting portion 17 of the body 10. The magazine shaft 70 has a flange portion 72 at a lower end thereof to be assembled with the follower plate 55 And a magazine plate 95, which will be described below, is assembled in the upper part.

Of course, the magazine shaft 70 is also rotatably supported in the body 10 through the bearing 80. Fig.

6 and the like, the magazine assembly 90 includes a magazine bracket 91 assembled to the upper portion of the magazine shaft 70, a magazine plate 95 assembled to the upper portion of the magazine bracket 91, And a tool holder 97 provided around the magazine plate 95.

The magazine bracket 91 may be formed to have a skirt portion 92 formed under the circumferential surface of the magazine bracket 91 so as to cover the magazine support portion 17 of the body 10. And a circular stepped surface 94 is formed around the hole 93 so that the magazine plate 95 can be fitted and assembled.

The center of the magazine plate 95 is assembled to the magazine bracket 91 and the tool holders 97 to which the tool is mounted are continuously installed on the periphery thereof.

As described above, the technical ideas described in the embodiments of the present invention can be implemented independently of each other, and can be implemented in combination with each other. While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many alternatives, modifications, and variations will be apparent to those skilled in the art. It is possible. Accordingly, the technical scope of the present invention should be determined by the appended claims.

10: Body 11: Base portion
13: Switching component 15: Drive assembly
17: Magazine support part 20: Lower cover
25: duct cover 30:
31: Servo motor 32: Gear box
35: coupling box 36: flange portion
37: coupling 39: drive shaft
43: end cap 50: deceleration switching section
51: driving cam 52: cam groove
53: cam follower bearing 55: follower plate
70: magazine shaft 72: flange portion
90: Magazine assembly 91: Magazine bracket
92: skirt portion 93: hole
94: stage surface 95: magazine plate
97: Tool holder

Claims

A driving unit installed on one side of the body in a horizontal direction to generate a driving force;
A deceleration switching unit disposed on the inner side of the body to reduce the power input from the driving unit and change the power transmission direction in the vertical direction;
A magazine shaft vertically positioned in the body and coupled to the decelerating switching unit and rotated;
And a magazine assembly coupled to an upper end of the magazine shaft to mount a tool.

The method according to claim 1,
The body includes a base portion mounted on a main body frame of the machine tool, a switching portion on which the deceleration switching portion is provided on the base portion, a drive assembly portion on both sides of the switching portion, And a magazine supporting portion extending upward by a predetermined height in a cylindrical structure and having the magazine shaft and the magazine assembly installed above the switching drive portion.

The method of claim 2,
Wherein the switching component is formed with a duct hole on one side thereof and a duct cover is mounted on the duct hole.

The method according to claim 1,
Wherein the driving unit includes a driving shaft which is installed inside the body in a horizontal direction and is rotated by a servomotor,
Wherein the deceleration switching unit includes a drive cam that is mounted on the drive shaft and rotates, a follower plate rotatably mounted on a lower end of the magazine shaft in a horizontal direction, and a follower plate that is installed at a predetermined interval in the circumferential direction on the follower plate, And a cam follower bearing which is engaged with the cam follower and receives power.

The method according to claim 1,
Wherein the magazine assembly comprises a magazine bracket assembled on top of the magazine shaft, a magazine plate assembled on top of the magazine bracket, and a tool holder mounted around the magazine plate. Device.

The method of claim 5,
And a magazine support portion disposed vertically with a predetermined height in a cylindrical shape and on which the magazine shaft is located,
Wherein the magazine bracket is formed so that a skirt portion is formed at a lower portion of the circumferential surface thereof so as to cover the outside of the body.