KR102022725B1 - Auto tool changer for machine tools - Google Patents

Auto tool changer for machine tools Download PDF

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Publication number
KR102022725B1
KR102022725B1 KR1020120150664A KR20120150664A KR102022725B1 KR 102022725 B1 KR102022725 B1 KR 102022725B1 KR 1020120150664 A KR1020120150664 A KR 1020120150664A KR 20120150664 A KR20120150664 A KR 20120150664A KR 102022725 B1 KR102022725 B1 KR 102022725B1
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KR
South Korea
Prior art keywords
tool
clamp
pin
support bar
locking pin
Prior art date
Application number
KR1020120150664A
Other languages
Korean (ko)
Other versions
KR20140081996A (en
Inventor
박용배
Original Assignee
두산공작기계 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 두산공작기계 주식회사 filed Critical 두산공작기계 주식회사
Priority to KR1020120150664A priority Critical patent/KR102022725B1/en
Publication of KR20140081996A publication Critical patent/KR20140081996A/en
Application granted granted Critical
Publication of KR102022725B1 publication Critical patent/KR102022725B1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
    • B23Q3/155—Arrangements for automatic insertion or removal of tools, e.g. combined with manual handling
    • B23Q3/1552—Arrangements for automatic insertion or removal of tools, e.g. combined with manual handling parts of devices for automatically inserting or removing tools
    • B23Q3/1554—Transfer mechanisms, e.g. tool gripping arms; Drive mechanisms therefore
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
    • B23Q3/155—Arrangements for automatic insertion or removal of tools, e.g. combined with manual handling
    • B23Q3/1552—Arrangements for automatic insertion or removal of tools, e.g. combined with manual handling parts of devices for automatically inserting or removing tools
    • B23Q3/1554—Transfer mechanisms, e.g. tool gripping arms; Drive mechanisms therefore
    • B23Q2003/155414—Transfer mechanisms, e.g. tool gripping arms; Drive mechanisms therefore the transfer mechanism comprising two or more grippers
    • B23Q2003/155425—Transfer mechanisms, e.g. tool gripping arms; Drive mechanisms therefore the transfer mechanism comprising two or more grippers pivotable
    • B23Q2003/155428—Transfer mechanisms, e.g. tool gripping arms; Drive mechanisms therefore the transfer mechanism comprising two or more grippers pivotable about a common axis

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Automatic Tool Replacement In Machine Tools (AREA)

Abstract

The present invention discloses an automatic tool changer for a machine tool. The automatic tool changer for a machine tool includes a tool change arm (10) provided for tool change and having a pocket (11) formed at an end thereof; A tool clamp 21 movably disposed in the pocket 11 region to press and clamp a tool received in the pocket 11; A clamp support bar (22) disposed at a portion within the tool change arm (10) and the remaining area exposed from the tool change arm (10) to movably support the tool clamp (21); The tool clamp arm 22 is movably coupled to the tool change arm 10 in a direction intersecting the longitudinal direction of the clamp support bar 22, and an end thereof is disposed to be exposed to the outside of the tool change arm 10, and the tool clamp 21 A locking pin (31) for locking the clamp support bar (22) to clamp the tool or for unlocking the clamp support bar (22) for the tool clamp (21) to unclamp the tool; And a locking pin driver 40 for driving the locking pin 31.

Description

Automatic tool changer for machine tools {Auto tool changer for machine tools}

The present invention relates to an automatic tool changer for a machine tool, and more particularly, it is possible to reliably change a tool without being affected by the operation of the device or the current of use, as well as the tool during the tool change. The present invention relates to an automatic tool changer for a machine tool which can be clamped to effectively prevent the tool from being separated.

In a machine tool, a plurality of tools are provided in a tool magazine, and the tools are selected and mounted on a spindle according to the processing purpose of the workpiece.

At this time, the automatic tool changer (ATC) is a device that mounts the selected tool on the spindle and moves the tool mounted on the spindle to the tool magazine.

In other words, machine tools such as machining centers are equipped with an automatic tool changer (ATC), which takes the tool out of the tool magazine and mounts it on the spindle for machining. Place it back in the tool magazine.

On the other hand, when such a tool change during the tool change due to unexpected reasons may occur when the tool is separated.

When the tool is dismounted, the normal workpiece machining operation may not proceed, and even an accident may occur, so that the tool disengagement device is installed in the arm replacing the tool to prevent this.

The tool release prevention device facilitates tool changeover between the spindle and the tool magazine through a locking or unlocking action during tool change.

In applying the tool release device, the locking or unlocking operation of the tool release device has been conventionally applied in a hydraulic piston method.

The piston is associated with the spindle-side tool clamping action during tool change. The piston is reciprocated by the operation of the hydraulic solenoid valve connected to the piston side, and the time of changing the tool by pushing the tool release prevention device of the arm in contact with the piston rod It is operated to be detachable to

However, such a tool release leaving apparatus using the conventional hydraulic piston method is operated by a hydraulic device such as a piston cylinder, which is operated by a hydraulic solenoid valve in which hydraulic pressure is used, and thus instantaneous operation according to hydraulic viscosity. This may cause reliability problems in operation due to changes in the point of view, and concerns about freezing of the connection lines due to cold weather or the environment.

In addition, in the case of the hydraulic solenoid valve, there is a problem that a change in the timing of the solenoid valve operation occurs when the current supply method changes according to the user environment.

In fact, since the automatic tool changer is operated at a very high speed of about 1 second, in this case, there is a problem that the tool can be dislodged and damage to the inside of the tool or spindle is required. Therefore, a new alternative is required.

Korean Patent Application No. 10-2003-0100930 Korean Patent Application No. 10-2004-0083651 Korean Patent Application No. 10-2008-0128971

Accordingly, the present invention has been made to solve the problems described above, the object of which is that the operation of the device can be reliably changed the tool without being affected by the user environment or the operating current, as well as during the tool change It is possible to provide an automatic tool changer for a machine tool that can clamp a tool and effectively prevent the tool from being separated.

In order to achieve the above object, the present invention, a tool change arm is provided for the tool change, the pocket is formed at the end is disposed a tool; A tool clamp movably disposed in the pocket area for pressing and clamping a tool received in the pocket; A clamp support bar, a portion of which is disposed within the tool changer arm and the remaining area is exposed from the tool changer arm to movably support the tool clamp; The clamp support bar is movably coupled to the tool changer arm in a direction intersecting the longitudinal direction of the clamp support bar, the end being exposed to the outside of the tool changer arm, and the tool support bar clamping the tool A locking pin that locks or unlocks the clamp support bar such that the tool clamp unclamps the tool; And a locking pin driving unit for driving the locking pin.

In addition, the present invention further provides the following specific embodiments of the above-described embodiment of the present invention.

According to an embodiment of the present invention, the locking pin driver includes: a link unit driven by a driving force of a motor; A pin guide bar having one end coupled to one side of the link unit and linked to a movement of the link unit; And a pin pressing plate coupled to one end of the pin guide bar to selectively press the locking pin based on the operation of the motor.

According to an embodiment of the present invention, the link unit includes a pin drive lever cam driven to the operation of the motor; And a link member having one end coupled to the pin driving lever and interlocked with the operation of the pin driving lever, wherein the pin guide bar has one end coupled to one side of the link member to move the link member. You can exercise in conjunction with.

According to an embodiment of the present invention, the pin driving lever has a first cam follower moving along a first groove formed at one end of the cam gear rotated by the operation of the motor, and provided at one end thereof. By the operation of the cam follower, the first pivot portion can move about the axis.

According to the present invention, the operation of the device can be reliably changed tools without being affected by the user environment or the operating current, as well as the clamping of the tool during the tool change can effectively prevent the tool from falling off An automatic tool changer for a machine is provided.

1 is a configuration diagram of an automatic tool changer for a machine tool.
2 is a perspective view of main parts of an automatic tool changer for a machine tool.
3 is a rear perspective view of FIG. 2.
4 is a front view of FIG. 2.
5 is a perspective view of a tool change arm.
6 is a cross-sectional view of FIG. 5.

Hereinafter, with reference to the accompanying drawings will be described a preferred embodiment of the present invention.

1 is a configuration diagram of an automatic tool changer for a machine tool, FIG. 2 is a perspective view of main parts of an automatic tool changer for a machine tool, FIG. 3 is a rear perspective view of FIG. 2, FIG. 4 is a front view of FIG. 2, and FIG. 5 is a tool. Perspective view of the exchange arm, and FIG. 6 is a cross-sectional view of FIG.

Referring to these drawings, the automatic tool changer for a machine tool of the present embodiment can be applied to a machining center, for example, to replace a tool, and to clamp a tool when changing a tool, thereby effectively preventing the tool from being separated. So that is one device.

The structure of the tool change is similar to a number of techniques already filed and registered by the applicant.

However, in order to explain the clamping or unclamping structure and operation of the tool, a general structure will be described first.

The automatic tool changer for a machine tool of the present embodiment is provided with a motor (M, see FIG. 1) for generating power for clamping or unclamping operations of the tool together with the tool replacement operation. Although not necessarily limited thereto, according to an exemplary embodiment of the present invention, the motor M may be a direct current (DC) or alternating current (AC) servobot.

The rotating shaft 60 is directly connected to the motor shaft of the motor M, and the cam gear 50 is coupled to the rotating shaft 60. Therefore, when the motor M is operated to rotate the rotation shaft 60, the cam gear 50 connected thereto may be rotated.

Although not shown in detail, the second groove 52 is machined on the other end surface of the cam gear 50.

As the second cam follower (CAM FOLLOWER) 53 is moved on the second groove 52, the main lever 54 moves about the second pivot part 55 as an axis, and this force is transmitted to the movement bar. It is delivered via tool 56 to a tool change arm 10 which exchanges a tool.

The tool change arm 10 thus enables forward / reverse reciprocating motion so that the tool can exit or enter the spindle or tool magazine.

And the cam groove (not shown) attached to the turret gear (TURRET GEAR, 71) is carried on the side groove (not shown) machined on the side of the cam gear 50, and as a result the turret gear 71 and the idle gear 72 rotates, and this action finally makes the spindle and tool magazine tools interchangeable by rotating the tool change arm 10.

On the other hand, the tool must be prevented from being released during the replacement of the tool, which is made possible by the following structure.

In particular, since the following tool escape prevention structure is not operated by a hydraulic solenoid valve using hydraulic pressure as in the prior art, it is possible to reliably change the tool without the operation of the device being affected by the user environment or the operating current. Of course, the tool can be clamped during tool change, which effectively prevents the tool from falling off.

Referring first to the tool changer arm 10 with reference to FIGS. 5 and 6, the tool changer arm 10 is the portion that substantially changes the tool. For this purpose, the tool change arm 10 is formed with a pocket 11 in which the tool is placed.

Pocket 11 having a hook shape is provided at both ends of the tool change arm 10, respectively, and is formed at both ends of the tool change arm 10 so that the driving phase direction is reversed.

The pocket 11 of the tool change arm 10 is provided with a tool clamp 21 movably disposed in the pocket 11 region as shown in FIGS. 5 and 6 to press and clamp a tool accommodated in the pocket 11. .

The tool clamp 21 is pressed close to the tool and then fits into the end groove G of the tool (see FIG. 5) while allowing the tool to be clamped in the pocket 11 of the tool change arm 10.

The tool clamp 21 is connected to the clamp support bar 22 for the operation of the tool clamp 21 as described above.

The rod-shaped clamp support bar 22 has a portion disposed within the tool change arm 10 and the remaining area is exposed from the tool change arm 10 to movably support the tool clamp 21.

A support bar elastic member 23 is provided in the tool change arm 10 to elastically support the clamp support bar 22 in the tool change arm 10.

The support bar elastic member 23, which can be applied as a torsional coil compression spring, is provided in the direction in which the tool clamp 21 unclamps the tool, that is, the clamp support bar 22 pulls the tool clamp 21 to hold the tool clamp 21. ) Is elastically biased in a direction that allows the tool to be unclamped.

That is, when the end portion of the locking pin 31 is protruded as shown in FIG. 5, one area of the locking pin 31 in the tool change arm 10 has an effect of pressing while supporting the clamp support bar 22. Clamp support bar 22 advances tool clamp 21 to cause tool clamp 21 to clamp the tool.

However, when the end of the locking pin 31 is pressed by the locking pin drive unit 40, the force used to support the clamp support bar 22 in the tool change arm 10 disappears. 23 allows the clamp support bar 22 to enter the tool change arm 10, thereby causing the tool clamp 21 to unclamp the tool.

On the other hand, as described above, the locking pin 31 is movably coupled to the tool change arm 10 in the direction crossing the longitudinal direction of the clamp support bar 22.

The end of this locking pin 31 is arranged to be exposed to the outside of the tool change arm 10, and the clamp support bar 22 is locked so that the tool clamp 21 clamps the tool or the tool clamp 21 is used for the tool. It serves to unlock the clamp support bar 22 to unclamp the.

The end of the locking pin 31 driven by the locking pin driver 40 protrudes so as to be exposed to the outside of the tool change arm 10 as shown in FIG. 5, for example, by locking the clamp support bar 22 to lock the tool clamp 21. This is the case when) is clamped.

Although not shown, the end of the locking pin 31 enters the tool change arm 10 when the clamp support bar 22 is unlocked to cause the tool clamp 21 to unclamp the tool.

As such, by driving the locking pin 31, the tool can be clamped or unclamped in the pocket 11 of the tool change arm 10, for which a locking pin drive 40 is provided.

As indicated by the arrows in FIG. 3, the pin drive lever 43, the link member 44, the pin guide bar 45, and the pin pressing plate 46 are all reciprocated in the same direction.

For example, when the pin drive lever 43 is approached toward the tool change arm 10, the pin pressing plate 46 is approached toward the tool change arm 10 by the link member 44 and the pin guide bar 45, and then locked. The end of the pin 31 can be pressed.

Likewise, when the pin drive lever 43 is operated with respect to the tool change arm 10, the pin pressure plate 46 is spaced with respect to the tool change arm 10 by the link member 44 and the guide bar 45. Away from the end of the locking pin 31.

3 and 4, according to another preferred embodiment of the automatic tool changer for a machine tool according to the present invention, the locking pin drive 40 includes a link unit, a pin guide bar 45, and a pin pressing plate. (46).

The link unit is driven by the driving force of the motor (M). According to a preferred embodiment of the present invention, the motor M may be a direct current (DC) or alternating current (AC) servobot.

Pin guide bar 45 is a long rod-shaped shaft that is coupled to one end of the link unit to move in conjunction with the movement of the link unit.

Pin pressing plate 46 is coupled to one end of the pin guide bar 45 serves to selectively press the locking pin 31 based on the operation of the motor (M).

When the pin pressing plate 46 presses the locking pin 31, the clamping of the tool is released, which is made possible by the synchronous control of the motor M.

Further, according to another preferred embodiment of the automatic tool changer for a machine tool according to the present invention, the link unit comprises a pin drive lever 43 and a link member 44.

The pin drive lever 43 is cam driven by the operation of the motor M. As shown in FIG. One end of the link member 44 is coupled to the pin drive lever 43 to operate in conjunction with the operation of the pin drive lever 43.

Further, in the link unit according to another preferred embodiment of the automatic tool changer for a machine tool of the present invention, one end of the pin guide bar 45 is coupled to one side of the link member 44 to move the link member 44. Has a structure that can interlock movement.

Looking at the configuration of the locking pin drive 40 in more detail, first, the pin drive lever 43 may be moved around the first pivot portion 42 by the operation of the motor (M) described above.

One end of the pin drive lever 43 is provided with a first cam follower 41. The first cam follower 41 moves along the first groove 51 formed at one end of the cam gear 50 that is rotated by the operation of the motor M, and the pin drive lever 43 moves to the first pivot part. (42) is moved to the axis.

Looking briefly at the operation of the automatic tool changer for a machine tool having such a configuration.

When the motor M is operated to change the tool, the automatic tool changer removes the tool from the tool magazine and mounts the tool on the spindle for processing, while the tool mounted on the spindle is stored back in the tool magazine.

At this time, when the tool is clamped in the pocket 11 of the tool change arm 10, the pin pressing plate 46 is spaced apart from the locking pin 31 by a separation operation of the pin drive lever 43 by the motor M. FIG. do.

Then, the end of the locking pin 31 is protruded as shown in FIG. 5, in which case an area of the locking pin 31 is pressed in the tool change arm 10 while supporting the clamp support bar 22. The clamp support bar 22 advances the tool clamp 21 to cause the tool clamp 21 to clamp the tool.

On the other hand, when unclamping a tool that has been clamped in the pocket 11 of the tool change arm 10, the link member 44 and the pin are moved by the approach action of the pin drive lever 43 by the servomotor M. The guide bar 45 is driven, thereby causing the pin pressing plate 46 to press the locking pin 31.

When the end of the locking pin 31 is pressed by the pin pressing plate 46 by the locking pin driver 40 as described above, the force supporting the clamp support bar 22 in the tool change arm 10 is reduced. As it disappears, the support bar elastic member 23 enters the clamp support bar 22 into the tool change arm 10, thereby causing the tool clamp 21 to unclamp the tool.

According to this embodiment having such a structure and operation, it is possible to reliably change the tool without being affected by the operation of the device or the operating current, as well as to clamp the tool at the time of tool change, so that the tool is released. Can be effectively prevented.

In particular, in the present embodiment, the link unit, that is, the pin drive lever 43, the link member 44, the pin guide bar 45, and the pin pressurization, together with the additional machining operation of the surface where the cam gear 50 is not used. Through the simple configuration of the plate 46, all the operations of the tool change and the action of clamping or unclamping together with the operation of the motor (M) can provide an advantageous effect than the prior art.

As described above, the present invention is not limited to the described embodiments, and various modifications and changes can be made without departing from the spirit and scope of the present invention, which will be apparent to those skilled in the art. Therefore, such modifications or variations will have to be belong to the claims of the present invention.

10: tool change arm 11: pocket
21 tool clamp 22 clamp support bar
23: support bar elastic member 31: locking pin
32: pin elastic member 33: elastic member housing
40: locking pin drive portion 41: first cam follower
42: first pivot portion 43: pin drive lever
44 link member 45 pin guide bar
46: pin pressure plate 50: cam gear
51: first groove 52: second groove
53: second cam follower 54: main lever
55: second pivot portion 56: movement transmission bar
60: rotating shaft

Claims (4)

motor;
A cam gear formed at one end of the first groove, a second groove formed at the other end thereof, and rotated by the operation of the motor;
A tool change arm provided for tool change, the tool change arm having a pocket formed at an end thereof;
A tool clamp movably disposed in the pocket area for pressing and clamping a tool received in the pocket;
A clamp support bar, a portion of which is disposed within the tool changer arm and the remaining area is exposed from the tool changer arm to movably support the tool clamp;
The clamp support bar is movably coupled to the tool change arm in a direction intersecting the longitudinal direction of the clamp support bar, the end of which is exposed to the outside of the tool change arm, and the tool support bar clamps the clamp support bar. A locking pin that locks or unlocks the clamp support bar such that the tool clamp unclamps the tool; And
Includes; locking pin driving unit for driving the locking pin,
The locking pin drive unit,
A link unit driven along the first groove of the cam gear by the driving force of the motor;
A pin guide bar having one end coupled to one side of the link unit and linked to a movement of the link unit; And
And a pin pressing plate coupled to one end of the pin guide bar to selectively press the locking pin based on the operation of the motor.
A movement transmission bar driven along the second groove of the cam gear by the driving force of the motor;
And a tool change arm (10) for forward and reverse reciprocating movement of the tool through the movement transfer bar.
delete The method of claim 1, wherein the link unit,
A pin drive lever cam driven to operate the motor; And
And a link member having one end coupled to the pin driving lever, the link member being operated in conjunction with the operation of the pin driving lever.
One end of the pin guide bar is coupled to one side of the link member, the automatic tool changer for a machine tool, characterized in that the movement in conjunction with the movement of the link member.
The method of claim 3,
The pin drive lever,
A first cam follower, which is moved along the first groove of the cam gear, is provided at one end and is moved around the first pivot part by the operation of the first cam follower. Device.
KR1020120150664A 2012-12-21 2012-12-21 Auto tool changer for machine tools KR102022725B1 (en)

Priority Applications (1)

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KR1020120150664A KR102022725B1 (en) 2012-12-21 2012-12-21 Auto tool changer for machine tools

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020120150664A KR102022725B1 (en) 2012-12-21 2012-12-21 Auto tool changer for machine tools

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KR20140081996A KR20140081996A (en) 2014-07-02
KR102022725B1 true KR102022725B1 (en) 2019-11-05

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009125912A (en) * 2007-11-28 2009-06-11 Okubo Gear Co Ltd Automatic tool changer
JP2009297798A (en) * 2008-06-10 2009-12-24 Mori Seiki Co Ltd Automatic tool changing device of machine tool

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20040083651A (en) 2003-03-24 2004-10-06 장준호 tea manufacturing process(Acori Rhizoma)of native plant

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009125912A (en) * 2007-11-28 2009-06-11 Okubo Gear Co Ltd Automatic tool changer
JP2009297798A (en) * 2008-06-10 2009-12-24 Mori Seiki Co Ltd Automatic tool changing device of machine tool

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