KR102520194B1 - Automatic tool Changer - Google Patents

Abstract

An automatic tool changer is disclosed. In the automatic tool changer according to an embodiment of the present invention, an adapter unit capable of transferring high-pressure oil is provided on the front side of the disk, so that stable operation according to the rotation of the disk is possible.

Description

Automatic tool changer {Automatic tool Changer}

The present invention relates to a tool post used in a machine tool, and more particularly, to an automatic tool changer.

In general, a machine tool refers to a machine used for the purpose of processing a metal/non-metal workpiece into a desired shape and size using an appropriate tool by various cutting processing methods or non-cutting processing methods.

Various types of machine tools, including turning centers, vertical/horizontal machining centers, door type machining centers, Swiss turns, electric discharge machines, horizontal type NC boring machines, CNC lathes, and multi-tasking machines, are widely used in various industrial fields to suit the purpose of the work. It is being used.

Among machine tools, a multi-tasking machine refers to a turning center equipped with a multifunctional automatic tool changer (ATC) and tool magazine that performs various types of machining such as turning, drilling, tapping, and milling.

When loading or exchanging tools necessary for machining on a multi-task machine, the operator manually mounts the tools in the tool magazine. Various types of machine tools currently in use have operating panels to which numerical control (NC) or computerized numerical control (CNC) technology is applied. This operation panel has various function switches or buttons and a monitor.

In addition, the machine tool has a table on which the material, which is a workpiece, is seated and transported for processing, a pallet for preparing the workpiece before processing, a spindle that rotates with a tool or workpiece combined, a tailstock for supporting the workpiece, etc. etc. are provided.

In addition, tables, tool posts, spindles, tailstocks, and anti-locking devices are provided with a transfer unit that transfers along a feed axis to perform various processing, and a number of tools are used for various processing, and a number of tools are stored and stored. A tool magazine or turret is used as a form of tool storage. These machine tools use a plurality of tools for various processing, and a tool magazine is used in the form of a tool storage area for storing and storing a plurality of tools.

The machine tool is equipped with an automatic pallet changer (APC) to minimize non-processing time. The automatic pallet changer (APC) automatically exchanges a pallet between a workpiece processing area and a workpiece installation area, and a workpiece can be mounted on the pallet.

In addition, the machine tool is provided with an automatic tool changer (ATC) for withdrawing or re-accommodating a specific tool from a tool magazine according to a command of a numerical control unit to improve productivity.

In particular, the types of tool magazines used in machining centers and turning centers can be largely classified into two types. One is a drum type tool magazine and a chain type tool magazine. Conventionally used automatic tool changers (ATC) are divided into arm type and arm type depending on the tool clamping method. It is divided into armless type.

A conventional automatic tool changer is provided with a clamping unit for supplying or blocking hydraulic pressure to clamp or unclamp a tool on the side of a body constituting an outer shape, and a tool holder configured to clamp or unclamp a tool. do.

Since the clamping unit is installed on the side of the body, it is exposed to chips or cutting oil, causing frequent failure of the piston constituting the clamping unit, and a countermeasure is required.

Korean Patent Publication No. 10-2003-001187

Embodiments of the present invention are automatic tool changers that can be used with a gearbox inside the disk of the tool post, improving tool post compatibility, preventing contamination due to the inflow of foreign substances, and simplifying the hydraulic line for oil supply. want to provide

An automatic tool changer according to an embodiment of the present invention includes a disk 200 installed on a tool post body 100; a tool clamping unit 300 installed on one side of the disk 200 to engage a tool; And an end is coupled to the inside of the disk 200, and oil is selectively supplied to the tool clamping unit 300 via a gearbox G provided inside the disk 200, so that the tool clamping unit It includes an adapter unit 400 for clamping or unclamping a tool coupled to 200.

The adapter unit 400 includes an adapter unit 410 coupled to the name plate 10 located inside the disk 200; It includes an adapter cover 420 having an insertion groove 421 into which the adapter unit 410 is inserted.

The adapter part 410 includes a first hydraulic passage 402 formed through an axial direction after opening toward the inside from a side surface for clamping the tool; a second hydraulic passage 404 formed at a position spaced apart from the first hydraulic passage 402 for unclamping the tool; an oil leakage prevention member 406 coupled to the second hydraulic passage 404 and moving by hydraulic pressure to prevent oil from leaking to the outside; The oil leakage prevention member 406 is coupled to the first auxiliary passage 407 opened in a direction orthogonal to the second hydraulic passage 404 from the outside of the adapter part 410 and rotates the disk 200. ) and a positioning member 408 for preventing rotation.

The adapter part 410 further includes an elastic member S positioned at the front end of the oil leakage prevention member 406 and inserted into the second hydraulic passage 404 .

A plurality of first O-rings 411 are coupled to the outside of the adapter part 410 , and a first O-ring groove part 431 into which the first O-rings 411 are inserted is formed in the adapter cover 420 .

The positioning member 408 includes a pin part 408a screwed into the first auxiliary passage 407 and coupled to the oil leakage preventing member 406 in a surface contact state.

The positioning member 408 further includes a separation prevention member 408b provided to prevent the pin unit 408a from loosening.

The oil leakage preventing member 406 includes a contact portion 406a extending a predetermined length in an axial direction in a concave state to be in surface contact with an end of the pin portion 408a; An oil movement passage 406b opened through the center in an axial direction so that oil moves through the oil leakage prevention member 506 is included.

The oil leakage prevention member 406 is provided with an oil leakage prevention O-ring 406c on the outside so as to be in close contact with the inside of the second hydraulic passage 404 .

The adapter cover 420 includes a third hydraulic passage 422 communicating with the first hydraulic passage 402; A fourth hydraulic passage 424 communicating with the second hydraulic passage 404 is formed.

An inspection opening 420a opened to inspect the adapter unit 410 located inside is formed in the adapter cover 420, and an inspection opening cover 420b is installed in the inspection opening 420a.

An automatic tool changer according to an embodiment of the present invention includes a disk 200 installed on a tool post body 100; a tool clamping unit 300 installed on one side of the disk 200 to engage a tool; The tool clamping unit ( 200) for clamping or unclamping a tool coupled to the adapter unit 400, wherein the adapter unit 400 is coupled to the name plate 10 located inside the disk 200 ( 410) and an adapter cover 420 having an insertion groove 421 into which the adapter unit 410 is inserted, installed on the adapter unit 410 to prevent oil leakage during unclamping operation. The prevention member 406 is made of a material different from that of the adapter part 410 .

According to the present embodiments, a gearbox can be installed inside an automatic tool changer, so tool post compatibility is improved, and design and manufacturing diversity are improved because there is no space restriction on the side of a tool post body.

In the present embodiments, contamination by chips or cutting oil can be prevented, and problems caused by foreign substances are prevented.

In the present embodiments, problems due to collision when the disc is rotated are prevented, the load of the motor unit is reduced, and the layout of the hydraulic line for supplying oil can be simplified.

1 is a perspective view illustrating an automatic tool changer according to an embodiment of the present invention;
2 is a diagram illustrating a disk and an adapter unit of an automatic tool changer according to an embodiment of the present invention.
Figure 3 is a cross-sectional view showing an adapter according to an embodiment of the present invention.
4 is a view showing the configuration of an oil leakage prevention member according to an embodiment of the present invention.
Figure 5 is a perspective view showing an oil leakage prevention member according to an embodiment of the present invention.
6 is a cross-sectional view of an automatic tool changer according to an embodiment of the present invention and a flow of oil according to clamping or unclamping;

An automatic tool changer according to an embodiment of the present invention will be described with reference to the drawings. For reference, FIG. 1 is a perspective view illustrating an automatic tool changer according to an embodiment of the present invention, and FIG. 2 is a diagram showing a disk and an adapter unit of the automatic tool changer according to an embodiment of the present invention. 3 is a cross-sectional view showing an adapter unit according to an embodiment of the present invention.

In this embodiment, an adapter unit capable of transferring high-pressure oil is provided on the front side of the disk, and a stable tool exchange operation can be promoted through the adapter unit capable of preventing oil leakage.

1 to 3, the automatic tool changer according to the present embodiment has a disk 200 installed on a tool post body 100 and a tool clamping device installed on one side of the disk 200 to engage a tool. An end is coupled to the inside of the unit 300 and the disk 200, and the oil passing through the gearbox G (see FIG. 6) provided inside the disk 200 is transferred to the tool clamping unit 300. and an adapter unit 400 for clamping or unclamping a tool coupled to the tool clamping unit 200 by selectively supplying the tool to the tool clamping unit 200 .

In this embodiment, since the gearbox (G) (see FIG. 6) can be installed inside the disk 200, it is more advantageous to use various working tools and compatibility can be improved.

In this case, since the operator can perform the work more easily, work efficiency and work speed can be improved at the same time.

The tool post body 100 is equipped with a motor unit for rotating the disk 200, which will be described later, so that the disk 200 can be rotated stably.

The disk 200 has a configuration in which a plurality of open disk holes are formed in the circumferential direction and an oil passage is provided for the movement of oil.

The tool clamping unit 300 is provided with a tool holder to clamp a tool, and can clamp or unclamp the tool by hydraulic pressure generated from a separately provided hydraulic unit.

The adapter unit 400 is configured to be coupled to the inside of the disk 200, and includes an adapter unit 410 coupled to the name plate 10 located inside the disk 200, and the adapter unit 410 It includes an adapter cover 420 in which an insertion groove 421 is formed to be inserted.

The name plate 10 has numbers 1 to N written on the front, so that the operator can check the corresponding numbers and select and perform the necessary work.

The adapter unit 410 is formed in a cylindrical shape, and is assembled in a state in which the adapter cover 420 is coupled to the front and the name plate 10 is positioned at the rear, based on the drawing.

The adapter unit 410 according to this embodiment has a first hydraulic passage 402 formed through an axial direction after being opened from the side surface toward the inside for clamping the tool, and the first hydraulic passage 402 for unclamping the tool. It includes a second hydraulic passage 404 formed at a position spaced apart from the first hydraulic passage 402 .

And an oil leakage prevention member 406 coupled to the second hydraulic passage 404 and moving by the hydraulic pressure to prevent external leakage of oil, and the second hydraulic passage 404 outside the adapter part 410. ) It is coupled to the first auxiliary passage 407 opened in a direction orthogonal to the direction and includes a positioning member 408 for preventing rotation of the oil leakage prevention member 406 according to the rotation of the disk 200. .

In this embodiment, while the disk 200 rotates while the gear unit G is located inside the disk 200, hydraulic passages for supplying oil can be communicated with each other, so that stable clamping or unclamping can occur. Hydraulic movement may be possible.

The first hydraulic passage 402 and the second hydraulic passage 404 extend to communicate with the oil passage formed in the disk 200 as shown in the drawing.

A plurality of first O-rings 411 are coupled to the outside of the adapter part 410, and a first O-ring groove part 431 into which the first O-rings 411 are inserted is formed in the inner circumferential direction of the adapter cover 420. is formed

A plurality of first O-rings 411 are installed at predetermined intervals to prevent leakage of oil, and are not limited to the shape and arrangement shown in the drawings.

Since the first O-ring 411 is inserted into the first O-ring groove part 431 formed in the adapter cover 420, oil leakage through the adapter part 410 can be prevented even when the oil pressure fluctuates rapidly. there is.

In particular, in this embodiment, a plurality of first O-rings 411 are formed so that oil moving for different purposes through the first hydraulic passage 402 and the second hydraulic passage 404 of the adapter unit 410 is not mixed or leaked. ) is coupled between the first hydraulic passage 402 and the second hydraulic passage 404.

In addition, the adapter part 410 is also spaced apart from the front and rear with respect to the center, and the first O-ring 411 is coupled to the remaining positions to prevent mixing of oil and to prevent oil leakage even when the first hydraulic passage 402 or Movement to the second hydraulic passage 404 can be prevented.

Even if oil leaks in the first hydraulic passage 402, the movement can be blocked by the first O-ring 411 and the first O-ring groove 431 into which the first O-ring 411 is inserted. problems are prevented.

The first hydraulic passage 402 and the second hydraulic passage 404 are spaced apart from each other in the axial direction of the adapter unit 410 and are configured to move oil independently.

In this embodiment, since the oil leakage prevention member 406 is coupled to the second hydraulic passage 404, oil leakage can be stably prevented during the unclamping operation. The oil leakage prevention member 406 may move forward or backward by a predetermined distance in the second hydraulic passage 404 according to oil pressure.

In this embodiment, when a worker installs the oil leakage prevention member 406, an accurate installation position can be implemented through a contact portion 406a and a pin portion 408a to be described later so as not to erroneously assemble.

The oil leakage preventing member 406 is formed with a contact portion 406a extending a predetermined length in the axial direction in a concave state so as to be in surface contact with an end of a pin portion 408a to be described later, and the oil leakage preventing member 406 An oil movement passage 406b through which the center of the axial direction passes is formed so that oil is moved therethrough.

The adapter part 410 further includes an elastic member S positioned at the front end of the oil leakage prevention member 406 and inserted into the second hydraulic passage 404 .

The oil leakage prevention member 406 moves forward or backward in the axial direction by a certain length corresponding to the tolerance according to the pressure of the oil applied in the axial direction, and at this time, the shock absorption and tolerance that the nozzle can receive when the disk 200 rotates An elastic member (S) is provided to prevent micro-oil leakage caused by a gap due to and maintain a close contact state at all times.

The oil leakage prevention member 406 is provided with an oil leakage prevention O-ring 406c on the outside so as to be in close contact with the inside of the second hydraulic passage 404, so that the position is installed in the correct position in the initially installed state, and the pin part (to be described later) When the position is fixed by 408a), it is maintained without being rotated even when the oil pressure is rapidly changed.

The contact portion 406a is formed flat on a side surface of the oil leakage preventing member 406 facing the first auxiliary passage 407 . The contact portion 406a has a horizontal width and a vertical length that are relatively longer than the horizontal width of the pin portion 408a, which will be described later, and also has a relatively longer vertical length.

The reason why the contact portion 406a is formed in this way is that the adapter unit 400 also rotates when the disk 200 rotates, so that rotational force is applied to the adapter unit 400 .

In this case, the adapter unit 400 has a possibility to rotate in the second hydraulic passage 404, and in particular, when the adapter unit 410 is coupled to the adapter cover 420, oil may leak through gaps due to coupling tolerances. Therefore, even when a rotational force is applied to the oil leakage preventing member 406, it is necessary for stable operation to maintain the position in the correct position.

In this embodiment, a positioning member 408 is installed to prevent rotation of the oil leakage prevention member 406 and a pin portion 408a contacting the contact portion 406a is provided.

The pin part 408a has a screw thread formed on its outer circumferential surface to be screwed into the first auxiliary passage 407, and a screw thread is also formed in the first auxiliary passage 407 so as to be screwed together with each other to prevent leakage of oil as described above. (406) can be accurately positioned to promote stable operation.

That is, when the pin part 408a is screwed into the first auxiliary passage 407 and the front end is in close contact with the contact part 406a, the oil leakage prevention member 406 is accurately positioned in the second hydraulic passage 404. This improves installation stability.

The positioning member 408 further includes a separation prevention member 408b coupled to the outside of the pin portion 408a to prevent the pin portion 408a from loosening.

The separation prevention member 408b may be changed into other forms other than the form shown in the drawings, and is not particularly limited to the form shown in the drawings.

In this case, even when the screwed state of the positioning member 408 in the first auxiliary passage 407 is partially loosened, it can be stably coupled without being loosened any more by the separation preventing member 408b, thereby improving operational stability. It can be improved and durability can be increased.

In this embodiment, an accurate assembly position can be set when a worker couples the pin part 408a by the aforementioned contact part 406a. Therefore, the operator can perform the assembly operation more accurately, and the assembly accuracy of the operator is improved.

A third hydraulic passage 422 communicating with the first hydraulic passage 402 and a fourth hydraulic passage 424 communicating with the second hydraulic passage 404 are formed in the adapter cover 420 . After oil is supplied to the adapter unit 410, it is supplied to the third hydraulic passage 422 when clamping of the tool is performed, and supplied to the fourth hydraulic passage 424 when unclamping is performed, and then to the tool clamping unit. It is moved to 300 to clamp or unclamp the tool.

An inspection opening 420a opened to inspect the adapter unit 410 located inside is formed in the adapter cover 420, and an inspection opening cover 420b is installed in the inspection opening 420a.

The inspection port 402a is open to a predetermined size, so that the operator can easily visually check the presence or absence of abnormalities in the positioning member 408 after releasing the coupling state of the inspection port cover 420b and inspect the operator. convenience and efficiency are improved.

An automatic tool changer according to another embodiment of the present invention includes a disk 200 installed on a tool post body 100, a tool clamping unit 300 installed on one side of the disk 200 to engage a tool, and the disk An end is coupled to the inside of the 200, and oil is selectively supplied to the tool clamping unit 300 via a gearbox G provided inside the disk 200, so that the tool clamping unit 200 An adapter unit 400 for clamping or unclamping a tool coupled to the adapter unit 400, wherein the adapter unit 400 is coupled to the name plate 10 located inside the disk 200. And, an oil leakage prevention member including an adapter cover 420 having an insertion groove 421 formed therein to insert the adapter part 410 and installed on the adapter part 410 to prevent leakage of oil during an unclamping operation. 406 is made of a material different from that of the adapter part 410 .

The oil leakage prevention member 406 is made of a material different from that of the adapter part 410, and brass may be used as an example. In this way, the reason why the oil leakage prevention 406 is not the same material as the adapter unit 410 but a different material is used is to prevent deformation due to wear and promote stable operation.

For example, when the oil leakage prevention member 406 and the adapter part 410 are made of the same material, wear or deformation due to friction may occur, and oil leakage may occur during the movement of high-pressure oil. In this embodiment, the oil leakage prevention member 406 is made of a different material so that such abrasion or deformation is not prevented, so that problems caused by breakdowns are minimized even in the process of long-term use, and operational stability is improved, thereby improving workability and operator convenience. do.

In the above, one embodiment of the present invention has been described, but those skilled in the art can add, change, delete, or add components within the scope not departing from the spirit of the present invention described in the claims. The present invention can be variously modified and changed by the like, and this will also be said to be included within the scope of the present invention.

100: tool body
200: disk
300: clamping unit
400: adapter unit
402, 404: first and second hydraulic passages
406: oil leakage prevention member
406a: contact
406b: oil movement passage
406c: Oil leak prevention O-ring
408: positioning member
408a: pin part
408b: departure prevention member
410: adapter unit
411: first O-ring
420: adapter cover
420a: inspection port

Claims (12)

a disk 200 installed on the tool post body 100;
a tool clamping unit 300 installed on one side of the disk 200 to engage a tool; and
The tool clamping unit ( 200) includes an adapter unit 400 for clamping or unclamping a tool coupled to,
The adapter unit 400 includes an adapter unit 410 coupled to the name plate 10 located inside the disk 200 and an adapter cover having an insertion groove 421 into which the adapter unit 410 is inserted. Automatic tool changer comprising (420). delete According to claim 1,
The adapter part 410 includes a first hydraulic passage 402 formed through an axial direction after opening toward the inside from a side surface for clamping the tool;
a second hydraulic passage 404 formed at a position spaced apart from the first hydraulic passage 402 for unclamping the tool;
an oil leakage prevention member 406 coupled to the second hydraulic passage 404 and moving by hydraulic pressure to prevent oil from leaking to the outside;
The oil leakage prevention member 406 is coupled to the first auxiliary passage 407 opened in a direction orthogonal to the second hydraulic passage 404 from the outside of the adapter part 410 and rotates the disk 200. ) Automatic tool changer comprising a positioning member (408) for preventing rotation. According to claim 3,
The adapter part (410) further includes an elastic member (S) positioned at a front end of the oil leakage prevention member (406) and inserted into the second hydraulic passage (404). According to claim 1,
A plurality of first O-rings 411 are coupled to the outside of the adapter part 410, and a first O-ring groove 431 into which the first O-rings 411 are inserted is formed in the adapter cover 420. Automatic tool change Device. According to claim 3,
The positioning member 408 includes a pin portion 408a screwed into the first auxiliary passage 407 and coupled to the oil leakage preventing member 406 in a surface contact state. According to claim 6,
The positioning member 408 further includes a detachment prevention member 408b provided to prevent the pin part 408a from loosening. According to claim 6,
The oil leakage preventing member 406 includes a contact portion 406a extending a predetermined length in an axial direction in a concave state to be in surface contact with an end of the pin portion 408a;
An automatic tool changer comprising an oil movement passage (406b) opened through a center in an axial direction so that oil is moved through the oil leakage prevention member (506). According to claim 6,
The oil leakage prevention member 406 is equipped with an oil leakage prevention O-ring 406c on the outside so as to be in close contact with the inside of the second hydraulic passage 404. According to claim 3,
The adapter cover 420 includes a third hydraulic passage 422 communicating with the first hydraulic passage 402;
An automatic tool changer having a fourth hydraulic passage (424) communicating with the second hydraulic passage (404). According to claim 1,
The adapter cover 420 is formed with an inspection opening 420a opened for inspection of the adapter unit 410 located inside, and an inspection opening cover 420b is installed in the inspection opening 420a Automatic tool changer. a disk 200 installed on the tool post body 100;
a tool clamping unit 300 installed on one side of the disk 200 to engage a tool;
The tool clamping unit ( 200) includes an adapter unit 400 for clamping or unclamping a tool coupled to,
The adapter unit 400 includes an adapter unit 410 coupled to the name plate 10 located inside the disk 200 and an adapter cover having an insertion groove 421 into which the adapter unit 410 is inserted. including (420);
An automatic tool changer in which an oil leakage prevention member 406 installed on the adapter part 410 to prevent oil leakage during an unclamping operation is made of a material different from that of the adapter part 410.

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