KR20180029828A - machine tool having a multiple spindle head - Google Patents

Abstract

According to the present invention, a machine tool comprises: a spindle which is rotated by being coupled to a tool; a spindle motor which rotates the spindle; a column on which the spindle is installed; a column guide which is disposed between the column and the spindle and guide a vertical movement of the spindle; and a spindle driving unit which is disposed on the column and moves the spindle in a vertical direction. The machine tool further comprises: a cooler which cools a coolant and circulates the cooled coolant; a first cooling plate which is disposed between the spindle motor and the spindle and cooled by the coolant supplied from the cooler, and prevents heat of the spindle motor from being transferred to the spindle; and a second cooling plate which is disposed between the spindle driving unit and the column and cooled by the coolant supplied from the cooler, and prevents heat of the spindle driving unit from being transferred to the column. According to the present invention, cooling plates are installed between a spindle motor and a motor base, and accordingly, it is possible to prevent heat of the spindle motor from being conducted to the spindle.

Description

Machine tool having a multiple spindle head

To a machine tool capable of suppressing the heat of a motor from being transmitted to a spindle.

In general, a machining center is a machine tool that performs a wide range of machining operations that can be done in a lathe, milling, drilling, boring machine, and the like.

Such a machining center is generally divided into a vertical machining center in which a main shaft is vertically mounted and a horizontal machining center in which a main shaft is horizontally mounted.

The vertical machining center includes a bed, a table installed on the upper part of the bed, a table on which the work is placed, a column vertically mounted on the rear of the bed, and a spindle mounted on the column.

That is, the vertical machining center is configured to machine a workpiece placed on a table while being moved in a horizontal direction and a vertical direction with a cutting tool installed on the spindle.

In the conventional machine tool, there is a problem that the heat of the spindle motor that rotates the spindle is conducted to the surrounding structure to cause thermal expansion, resulting in a machining error.

Korean Patent Publication No. 10-2013-0019345

It is an object of the present invention to provide a machine tool capable of preventing heat generated in a motor from being conducted to the surroundings.

It is an object of the present invention to provide a machine tool in which a cooling plate cooled by a coolant is arranged between spindle motor spindles and a spindle can be maintained at a proper temperature by a cooled cooling plate.

An object of the present invention is to provide a refrigerant flow path structure of a cooling plate formed of a metal material.

An object of the present invention is to provide a machine tool capable of simultaneously cooling respective spindle motors for rotating respective spindles in a machine tool in which two spindles are arranged.

The present invention relates to a spindle in which a tool is coupled and rotated; And a spindle motor for rotating the spindle; A column in which the spindle is installed; A column guide disposed between the column and the spindle, the column guide guiding the up and down movement of the spindle; And a spindle driving unit disposed in the column and moving the spindle up and down, the machine tool comprising: a cooler for cooling a refrigerant and circulating the cooled refrigerant; A first cooling plate disposed between the spindle motor and the spindle, the first cooling plate being cooled by the coolant supplied from the cooler and inhibiting the heat of the spindle motor from being transmitted to the spindle; And a second cooling plate disposed between the spindle driving unit and the column and cooled by the refrigerant supplied from the cooler and inhibiting the heat of the spindle driving unit from being transmitted to the column.

Wherein the first cooling plate and the second cooling plate are formed of a metal material, and the first cooling plate and the second cooling plate have a supply port through which the refrigerant is injected; A discharge port through which the injected refrigerant is discharged; And a refrigerant flow path connecting the supply port and the discharge port.

The refrigerant flow path includes: a first rectilinear flow path (l) forming the supply port; A second rectilinear flow path connected to the first rectilinear flow path and intersecting with the first rectilinear flow path; A third linear oil forming the discharge port; A fourth rectilinear flow passage connected to the third rectilinear flow passage and intersecting with the third rectilinear flow passage; And a connecting passage connecting the second rectilinear passage and the fourth rectilinear passage.

And a manifold connected to the supply port to supply the coolant of the cooler to the first cooling plate and the second cooling plate and to supply the discharged coolant to the cooler.

The present invention is advantageous in that a cooling plate is provided between the spindle motor and the motor base, and the heat of the spindle motor is prevented from being conducted to the spindle through the cooling plate.

The present invention has the advantage that the cooling plate can be continuously cooled since the cooled refrigerant circulates through the cooling plate.

Since the present invention provides a manifold for simultaneously cooling two cooling plates, there is an advantage that a plurality of spindle motors can be cooled at the same time.

Since the refrigerant circulation unit can circulate the refrigerant only to one of the plurality of cooling plates, the present invention has an advantage that the temperature can be individually controlled for each cooling plate.

1 is a perspective view of a plurality of spindles of a machine tool according to a first embodiment of the present invention.
2 is a front view of Fig.
3 is a right side view of Fig.
4 is a plan view of Fig.
Fig. 5 is a right side view in which the automatic tool changer module is omitted in Fig. 2;
Fig. 6 is a schematic configuration diagram of Fig. 2. Fig.
Fig. 7 is a schematic configuration diagram of Fig. 5. Fig.
Fig. 8 is a schematic configuration diagram of Fig. 4. Fig.
FIG. 9 is a configuration diagram illustrating a cooling module according to the first embodiment of the present invention.
10 is an installation perspective view of the motor base shown in Fig.
11 is an exploded perspective view of the motor base shown in Fig.
12 is a side sectional view of Fig.
13 is a plan sectional view of the motor base shown in Fig.
14 is an exploded perspective view of the spindle base shown in Fig.
15 is a plan sectional view of the spindle base shown in Fig.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention, and the manner of achieving them, will be apparent from and elucidated with reference to the embodiments described hereinafter in conjunction with the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. To fully disclose the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

Hereinafter, the present invention will be described with reference to the drawings for explaining a washing machine and its control method according to embodiments of the present invention.

Fig. 1 is a perspective view of a machine tool having a plurality of spindles according to a first embodiment of the present invention, Fig. 2 is a front view of Fig. 1, Fig. 3 is a right side view of Fig. 5 is a right side view of the automatic tool changing module shown in Fig. 2, Fig. 6 is a schematic configuration diagram of Fig. 2, Fig. 7 is a schematic configuration diagram of Fig. 5, Fig. 8 is a schematic configuration diagram of Fig. FIG. 9 is a structural view illustrating a cooling module according to the first embodiment of the present invention, FIG. 10 is an installation perspective view of the cooling base shown in FIG. 9, FIG. 11 is an exploded perspective view of the cooling base shown in FIG. 10 Fig. 12 is a side sectional view of Fig. 10, Fig. 13 is a plan sectional view of the cooling base shown in Fig. 10, Fig. 14 is an exploded perspective view of the spindle base shown in Fig. Fig.

The machine tool according to the present embodiment includes a machining apparatus 100 for simultaneously processing a plurality of objects, and a turntable 200 for simultaneously loading and unloading the plurality of objects.

The processing apparatus 100 includes a bed 10, a saddle 20 disposed on the bed 10 and relatively moved in the left and right direction with respect to the bed 10, And a plurality of spindles (40) disposed on the column (30) and relatively movable with respect to the column (30) in a vertical direction, the column (30) And an automatic tool changer module 50 mounted on the column 30 and mounted with a plurality of tools and coupling any one of the tools to the spindle 40.

The bed 10 is fixed to the paper side.

The saddle 20 is disposed above the bed 10.

The saddle 20 is relatively moved in the lateral direction from above the bed 10.

A saddle guide 25 for guiding the moving direction of the saddle 20 is disposed between the saddle 20 and the bed 10. The saddle guide 25 may be an LM guide.

The saddle 20 is seated on the saddle guide and moved in the left and right direction.

And a saddle drive unit (not shown) for moving the saddle 20 in the left and right direction.

The column 30 is disposed above the saddle 20.

The column 30 may be relatively moved in the forward and backward directions while being mounted on the saddle 20.

Between the column 30 and the saddle 20, a column guide 35 for guiding the moving direction of the column 30 is disposed. The column guide 35 may be an LM guide.

And a column driver (not shown) for moving the column 30 in the forward and backward directions.

The spindle (40) is installed in the column (30).

The spindle 40 includes a spindle motor 600, a first motor base 610 on which the spindle motor 600 is installed, and a spindle shaft 45 rotated by the spindle motor 600.

A first cooling plate 520, which will be described later, is installed between the spindle motor 600 and the first motor base 610, and the first cooling plate 520 is cooled by the coolant.

The spindle shaft 45 is disposed through the first cooling plate 520.

The first motor base 610 may be a spindle 40 for fixing the spindle motor 600.

The spindle 40 is installed in the column 30 and can be moved up and down. Between the spindle 40 and the column 30, a spindle guide 45 for guiding the moving direction of the spindle 40 is provided. The spindle guide 45 may be an LM guide.

The column 30 is provided with a spindle driver 650 for moving the spindle 40 in a vertical direction. In this embodiment, the spindle driver 650 is a motor. The spindle 40 is moved up and down along the spindle guide 45 by the operation of the spindle driver 650. A second cooling plate 530, which will be described later, is disposed between the spindle driver 650 and the column 30. The spindle driver 650 is installed in the column 30 through the second motor base 660.

The axis of the spindle driver 650 is arranged to pass through the second cooling plate 530.

In this embodiment, two of the spindle drivers are arranged, and the plurality of spindles 40 can be driven in the vertical direction. In this embodiment, the first cooling plate 520 is installed on the first spindle 41 and the second spindle 42, respectively.

The automatic tool change module (50) is installed in the column (30).

The automatic tool changer module 50 is disposed on the side of the spindle 40.

In the present embodiment, a plurality of spindles 40 are provided, and the automatic tool changing module 50 is installed on the left and right sides of the column 30, respectively.

A plurality of tools are installed in the automatic tool changer module (50).

Thus, the spindle 40 can be continuously machined by receiving the tools of the automatic tool changer module 50.

The spindles 40 replace the tool in each automatic tool changer module 50.

Each of the automatic tool changer modules 50 is provided with a distance detecting tool (not shown) for detecting the height of the automatic tool changer module 50 with respect to a processing plate (not shown) on which an object is placed.

In the present embodiment, the automatic tool changer module 50 is of a rotary type, and one of the tools can be coupled with the spindle 40 by rotating a plurality of tools.

The process and structure of assembling the tool to the automatic tool change module 50 are generally known to those skilled in the art, so a detailed description thereof will be omitted.

Further, since the operation structure of the saddle drive unit, the column drive unit, and the spindle drive unit is generally known to those skilled in the art, a detailed description thereof will be omitted.

The turntable 200 includes a turn bed 210 and a rotation unit 220 for rotating the turn bed 210.

The turn-bed 210 may be divided into at least a plurality of zones.

In this embodiment, the turn-bed 210 is divided into a first zone 211 and a second zone 212.

A partition plate 215 may be provided to partition the first and second sections 211 and 212.

The first zone 211 and the second zone 212 are divided based on the partition plate 215 but do not refer to a specific area of the turnbee 210.

That is, in the present embodiment, the second zone 212 is where the object is machined, and the first zone 211 is where the object is loaded or unloaded.

Since the turn bed 210 is rotated by 180 degrees, the second section 212 refers to the processing apparatus 100 side in the partition plate 215.

The first zone 211 refers to the opposite side of the second zone 212 with respect to the partition plate 215.

So that processing of the object 240 occurs only in the second zone 212.

Loading or unloading of the object 240 occurs only in the first zone 211.

The partition plate 215 prevents workpieces from splashing when the work is processed in the other area, and protects the worker holding the object 240.

Unlike the present embodiment, the turn-bed 210 may be divided into three or four zones.

The turntable 200 is rotated 180 degrees when the object 240 is processed, and the unprocessed object loaded in another area is moved to the work area.

The turn bed 210 is preferably positioned at the height of the saddle 20.

The turn bed 210 is located in front of the saddle 20.

The rotation unit 220 is a device that rotates the turn-bed 210 by providing power.

The rotation unit 220 uses a motor in the present embodiment.

Power transmission members (not shown) may be disposed between the turn bed 210 and the motor to rotate the turn bed 210 using the rotational force of the motor.

The power transmitting members may be variously embodied such as a belt-pulley structure, a gear structure, and a chain structure. Further, the motor may be directly connected to the turn-bed 210, and the turn-bed 210 may be rotated by the rotational force of the motor.

A plurality of objects 240 may be loaded on the turn-bed 210 to perform processing.

In order to shorten the loading and unloading time, a plurality of objects are disposed on the pallet 230 on which the plurality of objects 240 are placed.

A pallet 230 corresponding to the number of the spindles 40 may be disposed in each of the zones 211 and 212.

So that a plurality of pallets 230 are loaded in the first area 211 in the arrangement direction of the spindle 40. A plurality of pallets 230 are also loaded in the second area 212 in the arrangement direction of the spindle 40. [

The pallets 230 are preferably fixed to the turnbeds 210 in order to suppress movement during processing.

The pallet 230 may be fixed to the turn-bed 210 through fastening means such as a bolt or a clamp.

A spindle disposed on the left side is defined as a first spindle 41 and a spindle disposed on the right side is defined as a second spindle 42. [

A pallet corresponding to the first spindle 41 is defined as a first pallet 231 and a pallet corresponding to the second spindle 42 is defined as a second pallet 232. [

The same number of objects 240 are disposed on the first pallet 231 and the second pallet 232.

The first and second spindles 41 and 42 simultaneously process the respective objects 240 disposed on the first and second pallets 231 and 232.

For example, when machining the first object of the first pallet 231, the first object of the second pallet 232 is also machined simultaneously.

Next, when the first and second spindles 41 and 42 are moved in the lateral direction and the second object of the first pallet 231 is operated, the second object of the second pallet 232 is processed .

As described above, in this embodiment, the objects of the pallets 231 and 232 are paired and processed, thereby shortening the processing time of the objects.

When processing is performed in the second zone 212, loading or unloading of the object 240 is performed in the first zone 211.

In the present embodiment, the object 240 is disposed on the pallet, and the first and second pallets 231 and 232 before the processing are loaded in the first area 211.

After the machining is finished, when the turn bed 210 is rotated 180 degrees, the first and second pallets 231 and 232 after machining are unloaded in the first zone 211.

Thus, the machine tool according to the present embodiment can minimize the time required from the machining of the object to the restart of machining.

The cooling module of the machining apparatus will be described in more detail with reference to Figs. 9 to 15. Fig.

The cooling module 500 includes a cooler 510 for cooling the coolant, a first cooling plate 520 for receiving the coolant of the cooler 510, a second cooling plate 510 for receiving the coolant of the cooler 510, A second cooling plate 530 or a spindle jacket 540 for supplying a coolant to the first cooling plate 520 and the second cooling plate 530; 540 to at least one of the manifolds.

The first cooling plate 520 is disposed between the spindle motor 600 and the first motor base 610. The second cooling plate 530 is disposed between the spindle driving unit 650 and the second motor base 660.

The first cooling plate 520 and the second cooling plate 530 may be cooled by the coolant supplied from the cooler 510. The coolant supplied from the cooler 510 is circulated through the first cooling plate 520 and the second cooling plate 530 and is then recovered by the cooler 510 and cooled.

The first cooling plate 520 cools the heat generated by the spindle motor 600 and minimizes thermal expansion of the spindle 40 by heat. In particular, the first cooling plate 520 suppresses the heat of the spindle motor 600 from being transmitted to the spindle 40.

The second cooling plate 520 cools the heat generated by the spindle driver 650 and minimizes thermal expansion of the column 30 by heat. Particularly, the second cooling plate 530 prevents the heat of the spindle driver 650 from being transmitted to the column 30.

The spindle jacket 540 is disposed to surround the spindle 40.

The coolant in the cooler 510 is circulated. The coolant of the cooler 510 may circulate through the manifold 550 and the first cooling plate 520. The coolant of the cooler 510 can circulate through the manifold 550 and the second cooling plate 530. The coolant of the cooler 510 can circulate through the manifold 550 and the spindle jacket 540.

The first cooling plate 520 is cooled through circulating refrigerant and can cool the main shaft motor 600 and the first motor base 610.

The second cooling plate 530 is cooled through circulating refrigerant and can cool the spindle driving unit 650 and the second motor base 660.

The spindle jacket 540 is cooled through circulating refrigerant and can cool the spindle 40.

The first cooling plate 520 is provided with a circulation flow path so that the refrigerant can be circulated. In the second cooling plate 530, a circulation channel is provided so that the refrigerant can be circulated. In the spindle jacket 540, a circulation flow path is provided so that the refrigerant can be circulated.

The manifold 550 can select the flow direction of the coolant, change the flow direction, and adjust the flow rate. The manifold 550 provides the coolant supplied from the cooler 510 to the first cooling plate 520, the second cooling plate 530, and the spindle jacket 540, The cooling plate 520, the second cooling plate 530, and the spindle jacket 540 to the cooler 510.

The first cooling plate 520 is formed of a metal material.

The first cooling plate 520 includes a supply port 521 through which refrigerant is injected, a discharge port 522 through which the injected refrigerant is discharged, and a refrigerant passage 525 through which the supply port 521 and the discharge port 522 are connected .

The refrigerant flow path of the first cooling plate 520 is formed in a circular shape. A refrigerant pipe (not shown) is coupled to the supply port 521 and the discharge port 522, respectively.

In order to form the circular refrigerant passage 525 as in the present embodiment, the first cooling plate 520 should be composed of an upper plate and a lower plate, and the refrigerant passage 525 is formed in at least one of the upper plate and the lower plate .

The refrigerant flow path 525 may be formed through milling because it is formed as a curved line.

The second cooling plate 530 is formed of a metal material.

In this embodiment, the second cooling plate 530 is formed with a straight coolant passage 535.

The second cooling plate 530 includes a supply port 531, a discharge port 531, and a coolant passage 535. The refrigerant passage 535 is connected to the first rectilinear flow passage 533 forming the supply port 531 and the first rectilinear flow passage 533, A third linear flow path 536 forming the discharge port 532 and a third linear flow path 536 connected to the third linear flow path 536 and intersecting the third linear flow path 536 And a connecting flow path 538 connecting the fourth rectilinear flow path 537 and the second rectilinear flow path 534 and the fourth rectilinear flow path 537.

The outer end of the second rectilinear flow path 534, the outer end of the fourth rectilinear flow path 537, and the outer end of the connection flow path 538 are closed. The outer end of the second linear flow path 534, the outer end of the fourth linear flow path 537 and the outer end of the connection flow path 538 may be closed by a cap 539 or the like.

The coolant passage 535 of the second cooling plate 530 may be formed by drilling or milling. The refrigerant flow path 535 formed in a straight line has an advantage of being easy to process.

It will be understood by those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. The scope of the present invention is defined by the appended claims rather than the foregoing detailed description, and all changes or modifications derived from the meaning and scope of the claims and the equivalents thereof are included in the scope of the present invention Should be interpreted.

10: Bed 20: Saddles
30: Column 40: Spindle
41: first spindle 42: second spindle
45: Spindle axis 50: Automatic tool change module
100: processing device 200: turntable
500: Cooling module 510: Cooler
520: first cooling plate 520: second cooling plate
540: spindle jacket 550: manifold
600: spindle motor 610: first motor base
650: Spindle drive unit 660: Second motor base

Claims (4)

A spindle to which the tool is coupled and rotated; A spindle motor for rotating the spindle; A column in which the spindle is installed; A column guide disposed between the column and the spindle, the column guide guiding the up and down movement of the spindle; And a spindle driver disposed in the column and moving the spindle up and down,
A cooler for cooling the refrigerant and circulating the cooled refrigerant;
A first cooling plate disposed between the spindle motor and the spindle, the first cooling plate being cooled by the coolant supplied from the cooler and inhibiting the heat of the spindle motor from being transmitted to the spindle;
And a second cooling plate disposed between the spindle drive unit and the column and cooled by the coolant supplied from the cooler and inhibiting the heat of the spindle drive unit from being transmitted to the column. The method according to claim 1,
Wherein the first cooling plate and the second cooling plate are formed of a metal material,
The first cooling plate and the second cooling plate may include a supply port through which the refrigerant is injected; A discharge port through which the injected refrigerant is discharged; And a refrigerant flow path connecting the supply port and the discharge port. The method of claim 2,
The refrigerant passage
A first rectilinear flow channel (l) forming the supply port;
A second rectilinear flow path connected to the first rectilinear flow path and intersecting with the first rectilinear flow path;
A third linear oil forming the discharge port;
A fourth rectilinear flow passage connected to the third rectilinear flow passage and intersecting with the third rectilinear flow passage;
And a connecting flow channel connecting the second linear flow passage and the fourth linear flow passage. The method of claim 2,
And a manifold connected to the supply port to supply the coolant of the cooler to the first cooling plate and the second cooling plate, and to supply the discharged coolant to the cooler, the coolant being connected to the discharge port.

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