KR20140081996A - Auto tool changer for machine tools - Google Patents

Auto tool changer for machine tools Download PDF

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Publication number
KR20140081996A
KR20140081996A KR1020120150664A KR20120150664A KR20140081996A KR 20140081996 A KR20140081996 A KR 20140081996A KR 1020120150664 A KR1020120150664 A KR 1020120150664A KR 20120150664 A KR20120150664 A KR 20120150664A KR 20140081996 A KR20140081996 A KR 20140081996A
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KR
South Korea
Prior art keywords
tool
clamp
pin
arm
change arm
Prior art date
Application number
KR1020120150664A
Other languages
Korean (ko)
Other versions
KR102022725B1 (en
Inventor
박용배
Original Assignee
두산인프라코어 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.)
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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, the tool change arm (10) having a pocket (11) at an end thereof on which a tool is disposed; A tool clamp (21) movably disposed in the region of the pocket (11) for pressing and clamping a tool received in the pocket (11); A clamp support bar (22) partly disposed in the tool change arm (10) and the remaining area being exposed from the tool change arm (10) to movably support the tool clamp (21); A tool exchange arm (10) is movably coupled in a direction crossing the longitudinal direction of the clamp supporting bar (22) and an end is exposed to the outside of the tool exchange arm (10) ) Locking the clamp support bar (22) to clamp the tool or unlocking the clamp support bar (22) so that the tool clamp (21) unclamps the tool; And a locking pin driving part 40 for driving the locking pin 31.

Description

Technical Field [0001] The present invention relates to an automatic tool changer for a machine tool,

The present invention relates to an automatic tool changer for a machine tool, and more particularly, to an automatic tool changer for a machine tool in which the operation of the apparatus can be stably replaced without being affected by the user environment or the use current, The present invention relates to an automatic tool changer for a machine tool capable of effectively preventing a tool from being disengaged.

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

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

In other words, a machine tool such as a machining center is equipped with an automatic tool changer (ATC), and an automatic tool changer removes the tool from the tool magazine and mounts it on the spindle for machining, while the tool mounted on the spindle Put it back in the tool magazine.

On the other hand, when the tool is exchanged, the tool may be released during the tool change due to an unexpected reason.

In order to prevent this, in case of disengagement of the tool, normal tooling work can not be carried out and even an accident may occur.

The tool release prevention device ensures smooth tool change of the spindle and tool magazine by locking or unclamping operation during tool change.

In applying such a tool leaving and leaving apparatus, in the related art, a locking or unclamping operation of the tool leaving and leaving apparatus has been applied by a hydraulic piston method.

The piston is associated with the spindle side tool clamping action during tool change. The piston is reciprocated by the action of a hydraulic solenoid valve connected to the piston and the tool separation preventing device of the arm in contact with the piston rod is pushed, As shown in Fig.

[0004] However, since the conventional tool displacement apparatus using the hydraulic piston system is operated by a hydraulic device such as a piston cylinder and operated by a hydraulic solenoid valve using hydraulic pressure, And the reliability of the operation due to the fear of freezing of the connecting pipe due to the cold fat or environment.

Further, in the case of the hydraulic solenoid valve, there is a problem in that the change of the solenoid valve operation time occurs when the current supply mode changes according to the user's environment.

In fact, since the automatic tool changer operates at a very high speed of about 1 second or so, there is a problem that the tool may be detached, the inside of the tool or the spindle may be damaged, and 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 above-mentioned problems, and it is an object of the present invention to provide a tool changer which can stably exchange a tool without being influenced by a user environment or an operating current, And an object of the present invention is to provide an automatic tool changer for a machine tool capable of effectively preventing the tool from being separated by clamping the tool.

In order to achieve the above-mentioned object, the present invention provides a tool change arm provided for tool change, the tool change arm having a pocket formed with a tool at an end thereof; A tool clamp movably disposed in the pocket region to press and clamp a tool received in the pocket; A clamp support bar partly disposed in the tool change arm and the remaining area being exposed from the tool change arm to movably support the tool clamp; Wherein the tool support arm is movably coupled to the tool change arm in a direction crossing the longitudinal direction of the clamp support bar and the end is exposed to the outside of the tool change arm, A locking pin for locking or unlocking the clamp support bar such that the tool clamp unclamps the tool; And a locking pin driving unit for driving the locking pin.

The present invention further provides the following specific embodiments with respect to the above embodiment of the present invention.

According to an embodiment of the present invention, the locking pin driving unit includes: a link unit driven by a driving force of the motor; A pin guide bar coupled to one end of the link unit to move in conjunction with 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 operation of the motor.

According to an embodiment of the present invention, the link unit includes a pin drive lever which is cam driven in operation of the motor; And a link member that is coupled to the pin drive lever and is operated in conjunction with the operation of the pin drive lever, wherein the pin guide bar is coupled to one side of the link member such that movement of the link member It is possible to exercise in conjunction with the operation.

According to an embodiment of the present invention, the pin drive lever is provided at one end with a first cam follower moved along a first groove formed at one end of the cam gear rotated by the operation of the motor, And can be moved about the first pivot portion by the action of the cam follower.

According to the present invention, the operation of the apparatus can be stably replaced without being influenced by the user environment or the operating current, as well as a tool capable of clamping the tool during tool change, An automatic tool changer for a machine is provided.

1 is a block diagram of an automatic tool changer for a machine tool.
2 is a perspective view of a main portion of an automatic tool changer for a machine tool.
3 is a rear perspective view of FIG. 2. FIG.
4 is a front view of Fig.
5 is a perspective view of the tool exchange arm;
Fig. 6 is a sectional view of Fig. 5. Fig.

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

Fig. 3 is a rear perspective view of Fig. 2, Fig. 4 is a front view of Fig. 2, Fig. 5 is a front view of the automatic tool changer for a machine tool, FIG. 6 is a cross-sectional view of FIG. 5. FIG.

Referring to these figures, the automatic tool changer for a machine tool of the present embodiment can be applied to, for example, a machining center to replace a tool, as well as to clamp the tool at the time of tool change, .

The structure of the tool exchange is similar to the number of techniques already registered and registered by the present applicant.

However, the general structure will be described first to explain the clamping or unclipping structure and operation of the tool.

The automatic tool changer for machine tools of the present embodiment is provided with a motor M (see Fig. 1) for generating power for clamping or unclamping operation of the tool, in addition to the tool changing operation. According to a preferred embodiment of the present invention, a direct current (DC) or alternating current (AC) servo motor may be applied to the motor M.

A 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. Thus, when the motor M is operated and the rotary shaft 60 is rotated, the cam gear 50 connected thereto can be rotated.

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

As the second cam follower 53 is moved on the second groove 52, the main lever 54 is moved with the second pivot portion 55 as an axis, (10) through which the tool is exchanged.

Thus, the tool change arm 10 is enabled to reciprocate forward / backward so that the tool can be moved out of the spindle or the tool magazine.

The cam follower (not shown) attached to the turret gear 71 is moved by the side groove (not shown) formed on the side surface of the cam gear 50 and consequently the turret gear 71 and the idle gear Thereby rotating the tool exchange arm 10 by virtue of this action, so that the tool of the spindle and the tool magazine can be exchanged with each other.

On the other hand, it is necessary to prevent the tool from being released during the exchange of such a tool, which is made possible by the following structure.

Particularly, since the below-described tool separation preventing structure is not operated by a hydraulic solenoid valve that uses hydraulic pressure as in the prior art, the operation of the apparatus can be stably replaced without being affected by the user environment or the use current Of course, the tool can be clamped during the tool change, thereby effectively preventing the tool from being detached.

Referring first to the tool change arm 10 with reference to Figs. 5 and 6, the tool change arm 10 is a portion that substantially exchanges the tool. To this end, the tool exchange 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, and formed at both ends of the tool change arm 10 so that the upward direction of the drive is opposite.

A pocket 11 of this tool exchange arm 10 is provided with a tool clamp 21 which is movably disposed in the pocket 11 region as shown in Figs. 5 and 6 to press and clamp the tool received in the pocket 11 .

After the tool clamp 21 is approached toward the tool, it is fitted into the end groove (G, Fig. 5) of the tool so that the tool can 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 is partly 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 within the tool exchange arm 10 and resiliently supports the clamp support bar 22 within the tool change arm 10. [

The supporting bar elastic member 23 which can be applied with a torsion coil compression spring is arranged in the direction in which the tool clamp 21 unclamps the tool, in other words, when the clamp support bar 22 pulls the tool clamp 21 to the tool clamp 21 Is biased elastically in a direction that allows the tool to be unclamped.

That is, when the end of the locking pin 31 protrudes as shown in FIG. 5, one region of the locking pin 31 in the tool changing arm 10 presses the clamp supporting bar 22 while supporting it The clamp support bar 22 advances the tool clamp 21 to cause the tool clamp 21 to clamp the tool.

However, when the end portion of the locking pin 31 is pressed by the locking pin driving portion 40, the force of supporting the clamp supporting bar 22 in the tool changing arm 10 disappears, so that the supporting bar elastic member 23 cause the clamping support bar 22 to enter the tool changing arm 10, which causes the tool clamp 21 to unclamp the tool.

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

The end of the locking pin 31 is disposed to be exposed to the outside of the tool change arm 10 and the clamping bar 22 is locked so that the tool clamp 21 can clamp the tool, To unlock the clamp support bar 22 to unclamp the clamp support bar 22.

A state in which the end of the locking pin 31 driven by the locking pin driving portion 40 is protruded so as to be exposed to the outside of the tool changing arm 10 as shown in Figure 5 locks the clamp supporting bar 22, To allow the tool to clamp.

Although not shown, the state in which the end of the locking pin 31 enters the tool changing arm 10 corresponds to the case where the tool clamp 21 unlocks the clamp supporting bar 22 to unclamp the tool.

By driving the locking pin 31 as described above, the tool can be clamped or unclamped in the pocket 11 of the tool change arm 10, and a locking pin driving part 40 is provided for this purpose.

The pin drive lever 43, the link member 44, the pin guide bar 45, and the pin pressing plate 46 all reciprocate in the same direction, as shown by the arrows in Fig.

The pin pressing plate 46 is moved toward the tool changing arm 10 by the link member 44 and the pin guide bar 45 when the pin driving lever 43 is moved toward the tool changing arm 10, The end of the pin 31 can be pressed.

Similarly, when the pin drive lever 43 is moved away from the tool change arm 10, the pin pressing plate 46 is separated from 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 driver 40 includes a link unit, a pin guide bar 45, (46).

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

The pin guide bar 45 is a long rod-shaped shaft which is coupled at one end to one side of the link unit and moves in conjunction with the movement of the link unit.

The pin pressing plate 46 is coupled to one end of the pin guide bar 45 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 machine tools 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 to the operation of the motor M. The link member 44 is coupled at one end to the pin drive lever 43 and is operated 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 machine tools of the present invention, one end of the pin guide bar 45 is coupled to one side of the link member 44, And has a structure that can move together.

The pin drive lever 43 may be moved about the first pivot portion 42 by the operation of the motor M described above.

A first cam follower 41 is provided at one end of the pin drive lever 43. The first cam follower 41 is moved along the first groove 51 formed at one end of the cam gear 50 rotated by the operation of the motor M so that the pin drive lever 43 is moved to the first pivot (42) as an axis.

The operation of the automatic tool changer for a machine tool having such a configuration will be briefly described below.

When the motor (M) is operated to exchange the tool, the automatic tool changer removes the tool from the tool magazine and mounts it on the spindle for machining, while the tool mounted on the spindle is housed in the tool magazine again.

At this time, when the tool is clamped to the pocket 11 of the tool changing arm 10, the pin pressing plate 46 is separated from the locking pin 31 by the separation operation of the pin driving lever 43 by the motor M do.

5, an end portion of the locking pin 31 is in a protruding state. In this case, a part of the locking pin 31 in the tool changing arm 10 presses the clamp supporting 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 the tool clamped to the pocket 11 of the tool changing arm 10 is to be unclamped, the approaching operation of the pin drive lever 43 by the servomotor M causes the link member 44 and the pin The guide bar 45 is driven so that the pin pressing plate 46 presses the locking pin 31.

When the end of the locking pin 31 is pressed by the pin pressing plate 46 by the locking pin driving unit 40 as described above, the force for supporting the clamp supporting bar 22 in the tool changing arm 10 The support bar elastic member 23 causes the clamp support bar 22 to be inserted 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, the operation of the apparatus can be stably replaced without being affected by the user environment or the use current, as well as the tool can be clamped during tool change, Can be effectively prevented.

In particular, in the case of this embodiment, the link unit, that is, the pin drive lever 43, the link member 44, the pin guide bar 45, and the pin pressing With the simple configuration of the plate 46, all the operations of the tool change and the action of clamping or unclamping are performed simultaneously by the operation of the motor M, which can provide an advantage over the conventional one.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. Accordingly, such modifications or variations are intended to fall within the scope of the appended claims.

10: tool changing 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 driving part 41: first cam follower
42: first pivot part 43: pin drive lever
44: link member 45: pin guide bar
46: pin pressing plate 50: cam gear
51: first groove 52: second groove
53: second cam follower 54: main lever
55: second pivot portion 56: motion transmission bar
60: rotating shaft

Claims (4)

A tool change arm provided for tool change, the tool change arm having a pocket formed with a tool at an end thereof;
A tool clamp movably disposed in the pocket region to press and clamp a tool received in the pocket;
A clamp support bar partly disposed in the tool change arm and the remaining area being exposed from the tool change arm to movably support the tool clamp;
Wherein the tool support arm is movably coupled to the tool change arm in a direction crossing the longitudinal direction of the clamp support bar and the end is exposed to the outside of the tool change arm, A locking pin for locking or unlocking the clamp support bar such that the tool clamp unclamps the tool; And
And a locking pin driving unit for driving the locking pin.
The method according to claim 1,
Wherein the locking pin driver comprises:
A link unit driven by a driving force of the motor;
A pin guide bar coupled to one end of the link unit to move in conjunction with 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 an operation of the motor.
3. The method of claim 2,
The link unit includes:
A pin drive lever which is cam driven to operate the motor; And
And a link member, one end of which is coupled to the pin drive lever and is operated in conjunction with the operation of the pin drive lever,
Wherein the pin guide bar is coupled at one end to one side of the link member and moves in conjunction with movement of the link member.
The method of claim 3,
The pin drive lever includes:
A first cam follower which is moved along a first groove formed at one side end of the cam gear rotated by the operation of the motor is provided at one end and the first cam follower is moved by the operation of the first cam follower Wherein the tool is moved in the direction of the arrow.
KR1020120150664A 2012-12-21 2012-12-21 Auto tool changer for machine tools KR102022725B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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 true KR20140081996A (en) 2014-07-02
KR102022725B1 KR102022725B1 (en) 2019-11-05

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Citations (3)

* 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
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

Patent Citations (3)

* 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
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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