JP2020044614A - Nc circular table device - Google Patents

Abstract

To provide an NC circular table device which does not sacrifice a processing area on an NC machine tool, moreover, can prevent accumulation of chips due to processing and, further, can maintain rigidity on installation state onto the NC machine tool.SOLUTION: An NC circular table device provided with a rotary table constituted so as to attach a workpiece includes a bottom part and a housing. Therein, the bottom part is constituted so as to permit installation onto an NC machine tool via a fixing means, further, the housing is provided thereupon, the housing stores the rotary table ratably around a prescribed rotation shaft, further, has a plurality of clearance parts formed such that the fixing part is exposed on a part located on the lower side of the rotary table and a support part located between the plurality of clearances is constituted so as to support the housing and constituent elements of inner part thereof.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an NC rotary table device which is installed on a table of an NC machine tool and rotates and indexes a work.

  The NC rotary table device is one of auxiliary devices mounted on an NC machine tool. The NC rotary table device holds a work in a desired processing posture by using a rotary table configured to mount a desired target (work) to be processed. This is an apparatus that contributes to shortening of machining time and improvement of work efficiency by the NC machine tool. For example, Patent Document 1 discloses an example of an NC rotary table device. The NC rotary table device is movably installed on a table of an NC machine tool as shown in Patent Document 1 and the like.

  Conventionally, the installation of the NC rotary table device on the NC machine tool has been performed via a fixing member projecting from the NC rotary table device in the longitudinal direction of the table of the NC machine tool.

JP 2000-227805 A

  FIG. 5 shows an embodiment in which an NC rotary table device 10 ′ according to the related art is installed in an NC machine tool 1. A fixing member 26 'extending from the NC rotary table device 10' is provided before and after the bottom 12 'of the NC rotary table device 10', and a bolt 27 'is inserted as a fixing tool into the NC rotary table device. An apparatus 10 'is provided. For this reason, the area on the table 3 of the NC machine tool 1 is eroded by the amount of the extension of the fixing member 26 ', and the installation area of the NC rotary table device 10' is limited, and the processing area on the result table 3 is wasted space. There is a problem that it becomes narrower by 3 '. Further, there is also a problem that chips are accumulated in the protruding portion of the fixing member 26 ', and it becomes difficult to discharge the chips.

  The present invention has been made in view of such circumstances, and does not sacrifice a processing area on an NC machine tool, and can also prevent accumulation of chips due to processing. It is an object of the present invention to provide an NC rotary table device which can also maintain the rigidity in the above.

  According to the present invention, there is provided an NC rotary table device including a rotary table configured to be capable of mounting a workpiece, comprising a bottom portion and a housing, wherein the bottom portion can be installed on an NC machine tool via fixing means. And the housing is provided thereon, and the housing accommodates the turntable rotatably around a predetermined rotation axis, and in a portion located below the turntable, An NC rotary table having a plurality of ridges formed so that fixing means are exposed, and a support portion located between the plurality of ridges is configured to support the housing and components inside thereof. An apparatus is provided.

  By implementing the NC rotary table device according to the present invention, in a portion located below the rotary table, a plurality of burrs are formed so that the burrs are exposed, so that the burrs are located in each bur. This eliminates the need for the overhang-type fixing member conventionally required for mounting the NC rotary table device to the NC machine tool. Thus, the machining area on the NC machine tool is not sacrificed, and the accumulation of chips due to machining can be prevented. Further, according to the present invention, since the supporting portion located between the plurality of nuts is configured to support the housing and the components inside the housing, the NC rotary table device by providing the housing with the nuts is provided. Loss of rigidity is suppressed.

Preferably, in the NC rotary table device, the internal components include a bearing, the bearing rotatably supports the rotary table, and is inside the housing and rotates the housing. An NC rotary table device is provided, which is located on one side of a bisecting plane perpendicular to the axial direction and the support portion is provided on the one side.
Preferably, in the NC rotary table device, an NC rotary table device is provided in which the one side is a front side on which the work is mounted.
Preferably, in the NC rotary table device, an NC rotary table device is provided in which a diameter of the rotary table is 110 to 350 mm.
Preferably, in the NC rotary table device, the fixing means is a groove and a bolt, and is configured to be fixable by attaching the bolt so as to pass through a groove provided in the bottom. A table device is provided.
Preferably, in the NC rotary table device, an NC rotary table device is provided in which a plurality of the grooves are provided in parallel in the rotation axis direction.

1 is an overall configuration diagram of an NC machine tool equipped with an NC rotary table device according to an embodiment of the present invention. FIG. 2 is an overall perspective view of the NC rotary table device in FIG. 1. FIG. 3 is a front view of the NC rotary table device of FIG. 2. FIG. 4 is an enlarged vertical sectional side view taken along the line IV-IV in FIG. 3. The figure which shows the aspect which installed the NC rotary table apparatus which concerns on a prior art in the NC machine tool.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Various features shown in the embodiments described below can be combined with each other.

1. Overall Configuration FIG. 1 is an overall configuration diagram of an NC machine tool 1 equipped with an NC rotary table device 10 according to an embodiment of the present invention. As shown in FIG. 1, an NC rotary table device 10 according to an embodiment of the present invention is installed on an NC machine tool 1 and used. The NC machine tool 1 includes an NC control device 2, a table 3, and a tool 4 that performs a process such as cutting and drilling on a workpiece W. A slide block 5 is provided on the table 3, and an NC rotary table device 10 is provided on the slide block 5. The slide block 5 is movable in the longitudinal direction of the table 3. The NC rotary table device 10 is connected to the NC control device 2 by a cable 6 and a connector 7, and is controlled by a program incorporated in the NC control device 2.

2. Configuration of NC Rotary Table Apparatus 10 FIG. 2 is an overall perspective view of the NC rotary table apparatus 10 in FIG. As shown in FIG. 2, the NC rotary table device 10 includes a rotary table 11 configured to be able to mount a work W thereon. By controlling the rotation of the rotary table 11 with the work W attached, the work W is controlled to a desired processing posture. For this reason, as shown in FIG. 1, the tool 4 of the NC machine tool 1 can be applied to the workpiece W at a desired angle, which contributes to shortening of the machining time by the NC machine tool 1 and improvement of work efficiency. .

  FIG. 3 shows a front view of the NC rotary table device 10 of FIG. FIG. 4 is an enlarged vertical sectional side view taken along the line IV-IV of FIG. The NC rotary table device 10 includes a bottom portion 12 and a housing 13 coupled to the bottom portion 12. As shown in FIG. 4, a rotating body supporting portion 14 as an internal component is accommodated in the housing 13, and the rotating body supporting portion 14 rotates the rotating body as an internal component of the housing 13. The body 15 is rotatably supported.

  The rotating body 15 includes a spindle 16 having a center axis X extending in the front-rear direction (the left-right direction in FIG. 4) of the NC rotary table device 10, a worm wheel 17 fixed to an outer peripheral surface of the spindle 16, and a spindle 16. And a rotary table 11 concentrically fixed to the front surface 16a of the rotary table. The rotating body 15 is rotatable around a central axis X of the spindle 16. Therefore, the turntable 11 can also rotate around the central axis X of the spindle 16. On the front surface 13 a of the housing 13, a fixed outer ring portion 18 is provided around the turntable 11. The fixed outer race 18 is fixed to the rotating body support 14. A seal 18 a is provided in a gap between the rotary table 11 and the fixed outer race 18, and the seal 18 a is configured to prevent chips from entering the inside of the housing 13.

  A bearing 19 is interposed between the rotator 15 and the rotator support 14 as one of the components inside the housing 13. The bearing 19 rotatably supports the rotating body 15. The bearing 19 is located on one side of a bisecting surface (front and rear bisecting surface) Y, which is perpendicular to the center axis X of the rotating body 15 and bisects the housing 13 back and forth (right and left in FIG. 4). (On the side), and rotatably supports the first half of the rotating body 15 including the rotary table 11. Although FIG. 4 shows an example in which the bearing 19 is interposed on the front side which is one side, a pair of bearings 19 are interposed on the front side which is one side and the rear side which is the other side. May be implemented. In such a case, the rear bearing 19 (not shown) is located inside the housing 13 on the rear side (left side in FIG. 4) on the other side of the front and rear bisecting plane Y, and the rotating body The latter half of 15 is rotatably supported.

  A worm shaft 20 is rotatably accommodated in the housing 13, and the worm wheel 17 is rotated by the worm shaft 20. In the example of FIG. 4, the worm wheel 17 is located in the front and rear bisecting plane Y of the housing 13, and the worm shaft 20 meshes with the lowermost part of the worm wheel 17. Note that the position in the bisector Y is merely an example, and another preferable position may be determined. The worm shaft 20 is driven to rotate by a servomotor 21. As shown in FIG. 3, the servomotor 21 is housed in a motor box 22 fixed to a side surface of the housing 13.

  Although not shown, in FIG. 4, the rotating body 15 cannot rotate with respect to the rotating body support portion 14 on the rear side inside the housing 13 and on the other side of the front and rear bisecting plane Y. The air-driven clamp device for fixing the air-tight type is accommodated. This clamp device fixes the rotary table 11 so that it cannot rotate when the workpiece W is processed by the NC machine tool 1. Thus, the work W attached to the rotary table 11 is accurately processed by the tool 4. Although a detailed description of the clamp device is omitted here, it is described in, for example, Japanese Patent No. 4328060.

3. Features of the NC rotary table device 10 The NC rotary table device 10 according to the present embodiment has a feature in a structure for installation on the NC machine tool 1. Specifically, first, as shown in FIG. 4, the bottom 12 is configured to be installable on the slide block 5 of the NC machine tool 1 via the fixing means 23. Further, as shown in FIG. 2, the housing 13 has a plurality of burrs 24, 24, 24 formed at portions below the turntable 11 so that the fixing means 23 is exposed. Then, as shown in FIGS. 2 and 3, the supporting portions 25, 25 located between the plurality of braces 24, 24, 24 are formed by the housing 13 and the components (14, 15, 19, etc.) inside the housing 13. It is configured to support.

  As shown in FIG. 2, a plurality of grooves 26, 26, 26 constituting the fixing means 23 are formed on the front end face 12 a of the bottom 12. Each groove 26 extends rearward from the front end surface 12 a of the bottom portion 12, and is capable of receiving a shaft portion 27 a of a bolt 27 as a fixing tool that also forms the fixing means 23. The number of the groove portions 26 is not specifically limited as long as it is plural, but in the example of FIG. 2, three are formed at the left and right positions of the front end surface 12a of the bottom portion 12 and at the center position thereof. Although not shown in FIG. 2, a plurality of grooves 26 are similarly formed on the rear end face 12 b of the bottom 12. For example, the groove 26 is preferably formed in a U-shape or a U-shape to give a degree of freedom to the mounting position of the bolt 27. Further, it is preferable that the front end face 5a of the slide block 5 and the front end face 12a of the bottom portion 12 are aligned, and a plurality of U-shaped or U-shaped grooves 26 are provided in parallel in the central axis X direction. With such a configuration, it is possible to prevent chips from accumulating on the upper end surface of the slide block 5. Further, when the front end face 5a and the front end face 12a are aligned and removed during maintenance, the reproducibility of the position is improved.

  As shown in FIG. 2, each thread 24 is disposed at a position corresponding to each groove 26 as the fixing means 23 at a lower portion of the front surface 13 a and a lower portion of the rear surface 13 b (see FIG. 4) of the housing 13. You. Each thread 24 on the front surface 13 a of the housing 13 is formed as a recessed portion on the rear side of the housing 13, and each screw 24 on the rear surface 13 b of the housing 13 is formed as a recessed portion on the front side of the housing 13. . As shown in FIGS. 3 and 4, a head 27 b of a bolt 27 that is inserted into each groove 26 as a fixture is housed in each thread 24 in an exposed state. Each thread 24 has a rounded shape in order to secure safety when attaching the bolt 27 and to enhance design. It should also be noted that a tool for mounting the bolt 27 is large enough to enter and use the tool.

  The support portion 25 is located between the plurality of dents 24, 24, 24 at a lower portion of the front surface 13 a and a lower portion of the rear surface 13 b of the housing 13, and supports the housing 13 and a rotating body as an internal component thereof. The portion 14, the rotating body 15, the bearing 19, etc. are supported. The support portion 25 acts to suppress or compensate for the loss of rigidity of the NC rotary table device 10 due to the provision of the brush 24 in the housing 13. Therefore, the rigidity of the NC rotary table device 10 can be maintained.

  As shown in FIG. 4, the components inside the housing 13 supported by the front support portion 25 include a bearing 19. As described above, the bearing 19 is located inside the housing 13 and forward of the front and rear bisector Y of the housing 13. A large load is applied to the bearing 19 by the front half of the spindle 16, which is a component inside the housing 13, the rotary table 11, and the work W attached to the rotary table 11. Therefore, by providing the support portion 25 inside the housing 13 where the bearing 19 is located and forward of the front and rear bisecting surface Y of the housing 13, the rigidity of the NC rotary table device 10 can be efficiently maintained. Can be done. In the present embodiment, as is clear from the combination of FIGS. 3 and 4, two support portions 25, 25 are provided below the bearing 19. In FIG. 3, if the ridge 24 and the groove 26 located at the center are omitted, and the support portion 25 is provided also in this portion, the rigidity maintaining effect of the NC rotary table device 10 is further enhanced.

  Similarly, the support portion 25 on the rear side of the housing 13 supports the rear half of the housing 13 and components inside the housing 13.

  According to the NC rotary table device 10 according to the present embodiment, as shown in FIGS. 3 and 4, the head 27 b of the bolt 27 as a fixture is exposed in a portion located below the rotary table 11. Since a plurality of knurls 24, 24, 24 are formed, positioning the head 27b of the bolt 27 in each knurl 24 to mount the NC rotary table apparatus 10 to the NC machine tool 1 is conventionally required. The overhang-type fixing member 26 '(see FIG. 5) becomes unnecessary. Thus, the machining area on the NC machine tool 1 is not sacrificed, and the accumulation of chips due to machining can be prevented. In addition, since the support portions 25, 25 located between the plurality of braces 24, 24, 24 are configured to support the casing 13 and the components inside the casing 13, the NC provided by the casing 13 with the brass 24 is provided. Loss of rigidity of the rotary table device 10 is suppressed. Thereby, the rigidity of the NC rotary table device 10 can be maintained.

  Further, since the bearing 19 that rotatably supports the rotary table 11 is provided inside the housing 13 on the front side having the support portion 25, the bearing 19 to which a large load is applied is firmly supported by the support portion 25, and NC The rigidity of the rotary table device 10 can be maintained more reliably.

  In order to secure the rigidity of the NC rotary table device 10, the support portion 25 works most effectively when the diameter of the rotary table 11 is in the range of 110 to 350 millimeters. Specifically, for example, 110, 115, 120, 125, 130, 135, 140, 145, 150, 155, 160, 165, 170, 175, 180, 185, 190, 195, 200, 205, 210, 215, 220, 225, 230, 235, 240, 245, 250, 255, 260, 265, 270, 275, 280, 285, 290, 295, 300, 305, 310, 315, 320, 325, 330, 335, 340, 345, 350 millimeters and may be in the range between any two of the numerical values exemplified herein.

  In the present embodiment, when fixing the NC rotary table device 10 to the NC machine tool 1, a bolt 27 is attached so as to pass through a groove 26 provided in the bottom portion 12. For this reason, regardless of the length of the bolt 27, even if the length of the bolt 27 changes in more detail depending on the diameter of the rotary table 11, the vertical dimension of the thread 24 can be minimized. This can further contribute to maintaining the rigidity of the NC rotary table device 10.

4. Modifications The NC rotary table device 10 according to the present embodiment may be further ingeniously modified in the following manner.

  First, the present embodiment is characterized in that nuts 24, 24, 24 are provided below the front surface 13a of the housing 13 and below the rear surface 13b (see FIG. 4). The number is not limited to this. For example, the embodiment may be carried out so that two dents 24 or four or more dents 24 are provided.

  Second, the shapes of the burrs 24, 24, 24 are not limited to those shown in FIG. As described above, in the present embodiment, each thread 24 has a rounded shape in order to secure safety when attaching the bolt 27 and to enhance the design, but processing on the NC machine tool 1 is performed. As long as the effect of the present invention is obtained without sacrificing the area, the accumulation of chips due to processing can be prevented, and the rigidity in the state of being installed on the NC machine tool 1 can be maintained, the shape can be freely set. May be changed.

  Third, in the present embodiment, the rotary table 11 is driven to rotate via the worm shaft 20 and the worm wheel 17, but the present invention is not limited to this. For example, the rotary table 11 may be directly driven using a direct drive motor (not shown).

  Fourth, in the present embodiment, the slide block 5 is provided on the table 3 and the NC rotary table device 10 is provided on the slide block 5. However, the present invention is not limited to this. Not something. For example, the NC rotary table device 10 may be directly attached to the table 3 without using the slide block 5.

5. Conclusion As described above, according to the present embodiment, the machining area on the NC machine tool 1 is not sacrificed, and the accumulation of chips due to machining can be prevented. The NC rotary table device 10 which can also maintain the rigidity in the above can be implemented.

  The NC rotary table device 10 includes a turntable 11 configured to be able to mount a workpiece W thereon, and includes a bottom portion 12 and a housing 13. The housing 13 is provided so as to be installed on the machine 1, and the housing 13 is provided on the housing 1. The housing 13 rotatably accommodates the turntable 11 around a predetermined rotation axis, and is located below the turntable 11. In the portion to be fixed, the fixing means 23 has a plurality of dents 24 formed so as to be exposed, and the support portion 25 located between the plurality of dents 24 forms the housing 13 and the components (14, 15) inside thereof. , 19).

  Finally, various embodiments according to the invention have been described, but these have been presented by way of example and are not intended to limit the scope of the invention. The new embodiment can be implemented in other various forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. The embodiment and its modifications are included in the scope and gist of the invention, and are also included in the invention described in the claims and equivalents thereof.

1: NC machine tool 10: NC rotary table device 11: Rotary table 12: Bottom 13: Housing 19: Bearing 23: Fixing means 24: Slip 25: Support 26: Groove 27: Bolt W: Work X: Center axis Y : Bisecting plane

Claims (6)

An NC rotary table device including a rotary table configured to be capable of mounting a work,
Comprising a bottom and a housing,
The bottom is
It is configured to be installable on the NC machine tool via fixing means, and the casing is provided thereon,
The housing is
The rotary table is accommodated rotatably around a predetermined rotation axis, and, at a portion located below the rotary table, has a plurality of dents formed so that the fixing means is exposed,
A support portion located between the plurality of snails is configured to support the housing and components inside the housing.
NC rotary table device. The NC rotary table device according to claim 1,
Said internal components include bearings;
The bearing is
The rotary table is rotatably supported, and inside the housing, the housing is located on one side of a bisector perpendicular to the rotation axis direction,
The support portion is provided on the one side,
NC rotary table device. The NC rotary table device according to claim 1 or 2,
The one side is a front side to which the work is attached.
NC rotary table device. The NC rotary table device according to any one of claims 1 to 3,
The diameter of the turntable is 110 to 350 mm,
NC rotary table device. The NC rotary table device according to any one of claims 1 to 4,
The fixing means is a groove and a bolt,
It is configured to be fixable by being attached to the bolt so as to pass through the groove provided in the bottom portion,
NC rotary table device. The NC rotary table device according to claim 5,
A plurality of the groove portions are provided in parallel in the rotation axis direction,
NC rotary table device.