JP2015213985A - Machine tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a machine tool capable of suppressing transmission of vibration between a first processing part and a second processing part, through a bed body.SOLUTION: The machine tool includes: a bed body 4; a first processing part 8 provided at one side of the bed body 4; and a second processing part 12 provided at the other side of the bed body 4. A first spindle part of the first processing part is mounted on a first spindle support base 20 provided at one side of the bed body 4, and a second spindle part of the second processing part is mounted on a second spindle support base 45 provided at the other side of the bed body 4. Between the first spindle support base 20 and the second spindle support base 45, there is provided a slit space 80 extending in a front-to-back direction of the bed body 4, and a vibration suppression space 82 is provided under the slit space 80.

Description

  The present invention relates to a machine tool that processes a workpiece using a processing tool.

  In an NC lathe as an example of a machine tool, a bed main body installed on a factory floor, a first processing unit provided on one side of the bed main body, and provided on the other side of the bed main body. What comprises a 2nd process part is known (for example, refer patent document 1). In such a machine tool (for example, an NC lathe), the first processing unit includes a first main shaft portion for supporting the first main shaft and a first tool support disposed so as to face the first main shaft portion. A workpiece is mounted on the first main spindle via first chuck means, and the first processing tool is attached to the first tool support portion via, for example, first turret means. The second processing section includes a second main shaft portion for supporting the second main shaft, and a second tool support portion disposed to face the second main shaft portion, and the second main shaft has a second chuck. The workpiece is mounted through the means, and the second processing tool is attached to the second tool support portion through, for example, the second turret means.

Japanese Patent Laid-Open No. 11-58172

  However, such machine tools (for example, NC lathes) have the following problems to be solved. That is, since the bed body of the machine tool is integrally formed, if the workpiece is processed at the same time in the first and second processing parts, vibration generated during the processing in the first processing part is generated in the bed. The vibration propagated to the second processing portion through the main body and thus propagated may adversely affect the processing in the second processing portion, and vibration generated during processing in the second processing portion may cause the bed main body to be affected. May be adversely affected on the processing in the first processing unit due to the vibration transmitted to the first processing unit, and as a result, the propagation of the vibration through the bed main body may cause the first and / or It becomes difficult to process the workpiece with high accuracy in the second processing portion.

  Therefore, in order to solve such a problem, the bed body is divided into two parts, a first bed part and a second bed part, a first processing part is provided in the first bed part, and a second bed part is provided with a first processing part. Although it is conceivable to provide two working parts, in this case, there arises a new problem that the rigidity of the bed main body is lowered and the cutting ability (so-called cutting removal ability) is lowered.

  The object of the present invention is to adopt the structure of an integrated bed body in order to suppress a decrease in the rigidity of the bed body, and to propagate vibrations through the bed body between the first processing portion and the second processing portion. It is to provide a machine tool that can be suppressed.

The machine tool according to claim 1 of the present invention includes a bed main body, a first processing portion provided on one side portion of the bed main body, and a second processing portion provided on the other side portion of the bed main body. And the first machining part includes a first spindle part for supporting the first spindle and a first tool support part for supporting the first machining tool for machining the first workpiece. In the machine tool provided with the 2nd main axis part for supporting the 2nd main axis, and the 2nd tool support part for supporting the 2nd processing tool which processes the 2nd work piece, the 2nd processing part,
The first spindle portion is attached to a first spindle support provided on one side of the bed body, and the second spindle is a second spindle support provided on the other side of the bed body. A slit-like space extending in the front-rear direction of the bed body is provided between the first spindle support base and the second spindle support base, and is vibrated below the slit-like space. A suppression space is provided.

  In the machine tool according to claim 2 of the present invention, the first main spindle support is disposed on the inner side of the one side portion of the bed body, and the second main spindle is provided on the inner side of the other side portion. A support base is disposed, and an intermediate portion of the bed body is provided between the adjacent first spindle support base and the second spindle support base, and the slit-like space and the vibration suppression space are provided in the intermediate part. It is provided.

  In the machine tool according to claim 3 of the present invention, the vibration suppression space is filled with a vibration suppression member.

  Moreover, in the machine tool according to claim 4 of the present invention, the vibration suppressing member is made of any one of a metal granular member, a ceramic granular member, and granular sand, or a mixture thereof. To do.

  In the machine tool according to claim 5 of the present invention, there is provided a reinforcing connecting member for connecting the first spindle support base of the first machining section and the second spindle support base of the second machining section. It is selectively attached.

  Furthermore, in the machine tool according to claim 6 of the present invention, the one side portion of the bed body is provided with a first coolant space for circulating coolant corresponding to the first main shaft portion. The second side portion of the bed body is provided with a second cooling liquid space for circulating a cooling liquid corresponding to the second main shaft portion, and the reinforcing connecting member includes the first and second cooling liquid spaces. A coolant supply channel for supplying coolant to the second coolant space is provided, and a coolant return channel for returning the coolant from the first and second coolant spaces is provided. It is characterized by.

  According to the machine tool of the first aspect of the present invention, the first spindle support provided on one side of the one side of the bed body and the second spindle support provided on the other side of the bed body. A slit-like space extending in the front-rear direction of the bed body is provided therebetween, and a vibration suppression space is provided below the slit-like space, so that the first processed portion (particularly, the first main shaft portion) is 2 Propagation of vibrations through the bed body to the processing part is suppressed, thereby suppressing propagation of vibrations from the first processing part when processing in the second processing part, and the second processing part ( In particular, the propagation of vibrations from the second main spindle part) to the first processing part through the bed body is suppressed, whereby the influence of vibrations from the second processing part when processing is performed at the first processing part. As a result, even if the first and second processing parts are processed at the same time, It is possible to process the objects with high accuracy.

  According to the machine tool of the second aspect of the present invention, the first spindle support is disposed on the inner side of one side of the bed body, and the second spindle support is disposed on the inner side of the other side. In the machine tool having such a configuration, the slit-like space and the vibration suppression space are disposed in the middle portion of the bed body between the adjacent first spindle support base and the second spindle support base. Effectively suppressing the propagation of vibration from one machining part (especially the first spindle part) to the second machining part and the propagation of vibration from the second machining part (especially the second spindle part) to the first machining part. Can do.

  Moreover, according to the machine tool according to claim 3 of the present invention, since the vibration suppressing member is filled in the vibration suppressing space, propagation of vibration can be effectively suppressed by the vibration suppressing member. .

  Moreover, according to the machine tool according to claim 4 of the present invention, the vibration suppressing member is any one of a metal granular member, a ceramic granular member, and granular sand, or a mixture thereof. Further, it is possible to further effectively suppress the propagating vibration and further improve the processing accuracy of the workpiece.

  According to the machine tool of the fifth aspect of the present invention, the reinforcing connecting member is selectively attached between the first spindle support base of the first machining section and the second spindle support base of the second machining section. Since it is configured to be possible, the rigidity of the bed main body can be increased according to the purpose of use of the machine by attaching the reinforcing connecting member.

  Furthermore, according to the machine tool of the sixth aspect of the present invention, the coolant connection channel and the coolant return channel are provided in the reinforcing connecting member. (2) The coolant can be supplied to the first and second coolant spaces provided in the processing section, and the coolant from the first and second coolant spaces is returned as required through the coolant return channel. be able to.

The front view which shows the NC lathe as an example of the machine tool according to this invention. Sectional drawing which looked at the machine tool of FIG. 1 from the front. Sectional drawing which cut | disconnected the 1st process part of the machine tool of FIG. 1 by the III-III line | wire in FIG. 2, and looked diagonally right front. Sectional drawing which cut | disconnected the 1st process part of the machine tool of FIG. 1 by the IV-IV line in FIG. 2, and was seen from diagonally right front. Sectional drawing by the III-III line in FIG. Sectional drawing by the IV-IV line in FIG. Sectional drawing which cut | disconnected the state which attached the reinforcement connection member between the 1st and 2nd spindle support stand of the machine tool of FIG. 1 in front end part vicinity. Sectional drawing which cut | disconnected the state which attached the reinforcement connection member with the cooling fluid supply flow path with the machine tool of FIG. Sectional drawing which cut | disconnected the state which attached the reinforcement connection member with the cooling fluid return flow path with the machine tool of FIG. Sectional drawing which cut | disconnected the state which attached the reinforcement connection member between the 1st and 2nd main spindle support bases of the machine tool of FIG. 1, and filled the vibration suppression space with the cooling fluid supply flow path.

  Hereinafter, an embodiment of a machine tool according to the present invention will be described with reference to the accompanying drawings. 1 and 2, the illustrated NC lathe 2 as an example of a machine tool includes a substantially rectangular bed body 4, and a first processing portion 8 is provided on one side portion 6 of the bed body 4. A second processing portion 12 is provided on the other side portion 4 of the four.

  The first processing portion 8 on one side of the bed body 4 supports a first main shaft portion 14 for rotatably supporting a first main shaft (not shown) and a first processing tool 16 (FIGS. 3 and 4). The 1st tool support part 18 for doing is provided. In this embodiment, a first spindle support 20 is provided on the inner side of one side 6 of the bed body 4, the first spindle 14 is attached to the first spindle support 20, and the first tool support 18 is The one side portion 6 is provided on the outer side portion (that is, the left end portion of the bed main body 4 in FIGS. 1 and 2).

  A first main shaft of the first main shaft portion 14 extends in the front-rear direction of the bed body 4 (a direction perpendicular to the paper surface in FIGS. 1 and 2), and a first chuck means 22 is attached to the first main shaft. A first workpiece (not shown) to be processed in the first processing section 8 is detachably attached to the means 22. The first main shaft is rotated in a predetermined direction by a first main shaft driving motor 24 (FIGS. 3 and 4), and the first chuck means 22 is rotated integrally with the first main shaft.

  Further, the first tool support portion 18 includes a first turret device 26, and the first turret device 26 includes a plurality (eight in this embodiment) of first tool attachment portions 28 at intervals in the circumferential direction. A first turret means 30 provided and a first support member 32 that rotatably supports the first turret means 30 are provided, and a plurality of first tool attachment portions 28 are processed as required by a first workpiece. A first machining tool 16 (FIGS. 3 and 4) for removably attaching is attached. The first support member 32 moves in a predetermined direction (a direction parallel to the axis of the first main axis and perpendicular to the paper surface in FIGS. 1 and 2) via the first support mechanism 34 (FIG. 2). Although freely supported by the bed body 4 and moved in a predetermined direction by the first Z-axis drive motor 36 (FIGS. 3 and 4), the first support member 32 is substantially not shown in the figure, although not shown. It is supported by the first support mechanism 34 so as to be movable in a vertical direction (a direction perpendicular to the first main axis and in the left-right direction in FIGS. 1 and 2), and is perpendicular to a predetermined direction by a first X-axis drive motor 38. Moved in different directions.

  The second processing section 12 on the other side of the bed body 4 supports a second main shaft section 40 for rotatably supporting a second main shaft (not shown) and a second processing tool (not shown). And a second tool support 44 for carrying out the operation. In this embodiment, a second spindle support 45 is provided on the inner side of the other side 10 of the bed body 4, and the second spindle 40 is attached to the second spindle support 45, and the second tool support 44. Is provided on the outer side portion of the other side portion 10 (that is, the right end portion of the bed main body 4 in FIGS. 1 and 2).

  The second processing section 12 has the same configuration as the first processing section 8 described above, and the second main shaft (not shown) of the second main shaft section 40 extends in the front-rear direction of the bed body 4, and A second chuck means 42 is attached to the two main spindles, and a second workpiece (not shown) to be processed in the first processing section 12 is detachably attached to the second chuck means 42. The second main shaft is rotated in a predetermined direction by a second main shaft driving motor (not shown), and the second chuck means 42 is rotated together with the second main shaft.

  Further, the second tool support portion 44 is constituted by a second turret device 46, and the second turret device 46 is provided with a second turret means 50 provided with a plurality of second tool attachment portions 48 at intervals in the circumferential direction. And a second support tool 52 for rotatably supporting the second turret means 50, and a second processing tool (for processing a second workpiece as required in a plurality of second tool mounting portions 48). (Not shown) is removably attached.

  The second support member 52 moves in a predetermined direction (a direction parallel to the axis of the second main axis and perpendicular to the paper surface in FIGS. 1 and 2) via the second support mechanism 54 (FIG. 2). The second support member 52 is freely supported by the bed body 4 and moved in a predetermined direction by a second Z-axis drive motor (not shown), and the second support member 52 is not shown, but is substantially perpendicular to the predetermined direction. The second X-axis drive motor 56 is moved in a direction perpendicular to a predetermined direction.

  4 and 6 together with FIGS. 1 and 2, the NC lathe 2 is for cooling the first and second spindle support bases 20 and 45 of the first and second machining portions 8 and 12. First and second coolant spaces 58 and 60 are provided. In this embodiment, the first and second cooling liquid spaces 58 and 60 and the configuration related thereto are substantially the same, and the first cooling liquid space 58 (second cooling liquid space 60) will be described below. The first cooling liquid space 58 (second cooling liquid space 60) is disposed inside the one side part 6 (other side part 10) of the bed body 4, and the first main space part provided in the bed body 4. 58 a (second main space portion 60 a) and a first sub space portion 58 b (second sub space portion 60 b) provided on the first main shaft support base 20 (second main shaft support base 45). The first main space part 58a (second main space part 60a) and the upper first subspace part 58b (second subspace part 60b) are the first communication path 62 (second communication path 64) (see FIG. 2). ).

  The first main shaft support 20 (second main shaft support 45) also has a first inflow channel 66 (second inflow channel 68) communicated with the first main space 58a (second main space 60a). ) And a first outflow passage 70 (second outflow passage 71) communicated with the first subspace portion 58b (second subspace portion 60b). A first supply channel 72 (second supply channel 74) is connected to the first inflow channel 66 (second inflow channel 68), and the first outflow channel 70 (second outflow channel 71) is connected. Is connected to the first return channel 76 (second return channel 78).

  With this configuration, the coolant from, for example, the coolant tank serving as the coolant supply source is supplied from the first supply channel 72 (second supply channel 74) and the first inflow channel 66 (second inflow). It flows into the first main space 58a (second main space 60a) of the first cooling liquid space 58 (second cooling liquid space 60) through the flow path 68), and then the first main space 58a (second main space). Portion 60a), the first communication passage 62 (second communication passage 64) and the first subspace portion 58b (second subspace portion 60b), and then the first outflow passage 70 (second outflow passage 71). And return to the coolant tank through the first return channel 76 (second return channel 78), and thus the coolant is circulated through the first coolant space 58 (second coolant space 60). The first spindle support base 20 (second spindle support base 45) mainly by circulating the coolant. It is cooled.

  In this NC lathe 2, in order to suppress the propagation of vibration from the first machining unit 8 to the second machining unit 12, and to suppress the propagation of vibration from the second machining unit 12 to the first machining unit 8, It is structured as follows. 1 to 3 and FIG. 5, specifically, in the middle part of the bed main body 4, specifically, a first spindle support base 20 of the first processing section 8 and a second spindle support base 45 of the second processing section 12. A slit-shaped space 80 is provided between the two. The slit-shaped space 80 extends in the front-rear direction from the front end to the rear end of the bed main body 4, and the first spindle support base 20 and the second spindle support base 45 are separated from each other via the slit-shaped space 80.

  Further, a vibration suppression space 82 is provided below the slit-shaped space 80. The vibration suppression space 80 is provided in an intermediate portion of the bed body 4 (specifically, a portion located between the first spindle support base 20 and the second spindle support base 45) and extends in the front-rear direction of the bed body 4. It is formed in an elongated rectangular shape (see FIGS. 3 and 5), and an elongated opening 84 is provided on the upper surface of the bed body 4. Since it is comprised in this way, since the slit-shaped space 80 and the vibration suppression space 82 are provided between the 1st main axis | shaft part 14 of the 1st process part 8, and the 2nd main axis | shaft 40 of the 2nd process part 12. The propagation of vibration from the first processing unit 8 to the second processing unit 12 and the propagation of vibration from the second processing unit 12 to the first processing unit 8 through the bed body 4 is effectively suppressed, and as a result. Even if the first and second processing portions 8 and 12 are simultaneously processed, the influence of vibration can be suppressed, and the first and second processing portions 8 and 12 can accurately control the first and second workpieces. Can be processed.

  In this NC lathe 2, for example, the rigidity of the bed body 4 can be increased by attaching the reinforcing connecting member 90 as follows. Further description will be made with reference to FIGS. 7 to 9. In this embodiment, the reinforcing connecting member 90 is formed of a thin block-like member, and the first and second inflow passages of the first and second spindle support bases 20 and 45. Corresponding to 66, 68, a supply-side connection channel 92 (FIG. 8) is provided therein, and a coolant supply channel 94 for supplying coolant from a coolant supply tank (not shown) is provided on this supply side. Connected to the connection channel 92. A return-side connection channel 96 (FIG. 9) is provided inside the reinforcing connecting member 90 corresponding to the first and second outflow channels 70, 71 of the first and second spindle support bases 20, 45. The coolant return channel 98 that returns the coolant to the coolant supply tank is connected to the return side connection channel 96.

  As shown in FIGS. 7 to 9, the reinforcing connecting member 90 is attached across the first spindle support base 20 on the first processing section 8 side and the second spindle support base 45 on the second processing section 12 side. One side portion thereof is fixed to the inner side portion of the first spindle support base 20 by the mounting screw 97, and the other side portion is fixed to the inner side portion of the second spindle support base 45 by the mounting screw 99.

  When the reinforcing connecting member 90 is attached in this manner, the first spindle support base 20 on the first processing unit 8 side and the second spindle support base 45 on the second processing unit 12 side are connected via the reinforcing connection member 90. Therefore, the rigidity of the bed main body 4 can be increased by the reinforcing connecting member 90, and the rigidity reduction due to the slit-shaped space 80 can be compensated by attaching the reinforcing connecting member 90.

  Further, in the state where the reinforcing connecting member 90 is attached in this way, as shown in FIG. 8, one end side of the supply side connection flow path 92 is communicated with the first inflow flow path 66 of the first spindle support base 20. The other end side communicates with the second inflow channel 68 of the second spindle support base 45, and the coolant flows from the coolant supply tank (not shown) through the coolant supply channel 94 and the supply side connection channel 92 to the first. And supplied to the first and second coolant spaces 58 and 60 of the second processing units 8 and 12. Further, as shown in FIG. 9, one end side of the return side connection channel 96 of the reinforcing connecting member 90 is communicated with the first outflow channel 72 of the first spindle support base 20, and the other end side thereof is the second spindle support base. 45, the coolant from the first and second coolant spaces 58 and 60 of the first and second descending portions 8 and 12 is connected to the return-side connection channel 96 of the reinforcing connecting member 90. And returned to the coolant tank (not shown) through the coolant return channel 98.

  The vibration suppression space 90 is preferably filled with a vibration suppression member 100 for effectively suppressing vibration propagation, as shown in FIG. As the vibration suppressing member 100, a spherical member such as a steel ball, a glass ball, or a resin ball, a liquid material such as oil, or the like can be used. Either a metal granular member, a ceramic granular member, or granular sand, or these It is preferable to use a mixture of For example, iron, stainless steel, or the like can be used as the metal. The particle size of the metal granular member and the ceramic granular member is preferably about 150 to 500 μm, for example, and the particle size of the granular sand is preferably about 30 to 200 μm, for example. It is desirable that the cover member 102 be attached so as to cover the opening 84 of the vibration suppression space 82 after the vibration suppression member 100 is filled so as to sufficiently fill the vibration suppression space 82.

  Thus, when the vibration suppression member 100 is filled in the vibration suppression space 82, the vibration propagated through the intermediate portion of the bed body 4 is further effectively suppressed, and the first processing unit 8 (or the second processing unit 12). Can further suppress the influence of the vibration generated in the second processing unit 12 (or the first processing unit 8), and the first and second processing units 8 and 12 can perform processing with higher accuracy.

  Although one embodiment of the machine tool according to the present invention has been described above, the present invention is not limited to such an embodiment, and various changes or modifications can be made without departing from the scope of the present invention.

  For example, in the above-described embodiment, the supply side connection flow path 92 and the return side connection flow path 96 are provided in the reinforcing connection member 90, but the supply side connection flow path 92 and the return side connection flow path 96 are provided in the reinforcement connection member 90. The first main shaft support 20 and the second main shaft support 45 are provided with the first and second inflow passages 66 and 68 and the first and second outflow passages 70 and 71. And the first and second inflow channels for supplying the coolant from the coolant tank as in the embodiment shown in FIGS. 1 to 6. The first and second return passages for returning the coolant to the coolant tank may be connected to the first and second outflow passages 70 and 71 while being connected to the paths 66 and 68.

  In the above-described embodiment, the present invention is applied to an NC lathe. However, the present invention is not limited to such an NC lathe, and two processing portions adjacent to the bed main body, that is, the first and second processing. The present invention can be similarly applied to other machine tools provided with a section.

2 NC lathe 4 Bed main body 8 1st process part 12 2nd process part 14 1st main spindle part 18 1st tool support part 20 1st spindle support stand 26 1st turret apparatus 40 2nd spindle part 44 2nd tool support part 46 Second Turret Device 58 First Coolant Space 60 Second Coolant Space 80 Slit Space 82 Vibration Suppression Space 90 Reinforcement Connecting Member 100 Vibration Suppression Member

Claims (6)

A bed main body; a first processing portion provided on one side of the bed main body; and a second processing portion provided on the other side of the bed main body, wherein the first processing portion includes a first spindle. A first spindle portion for supporting the first workpiece and a first tool support portion for supporting the first machining tool for machining the first workpiece, and the second machining portion for supporting the second spindle. A machine tool comprising: a second main spindle portion; and a second tool support portion for supporting a second machining tool for machining a second workpiece.
The first spindle portion is attached to a first spindle support provided on one side of the bed body, and the second spindle is a second spindle support provided on the other side of the bed body. A slit-like space extending in the front-rear direction of the bed body is provided between the first spindle support base and the second spindle support base, and is vibrated below the slit-like space. A machine tool characterized in that a restraining space is provided.   The first spindle support is disposed on the inner side of the one side of the bed body, the second spindle support is disposed on the inner side of the other side, and the first spindle support is adjacent to the bed. The intermediate part of the bed main body is provided between the first spindle support and the second spindle support base, and the slit-like space and the vibration suppression space are provided in the intermediate part. Machine Tools.   The machine tool according to claim 1, wherein a vibration suppression member is filled in the vibration suppression space.   The machine tool according to claim 3, wherein the vibration suppressing member is made of any one of a metal granular member, a ceramic granular member, and granular sand, or a mixture thereof.   The reinforcing connecting member for connecting the first spindle support base of the first processing section and the second spindle support base of the second processing section is selectively attached. A machine tool according to any one of the above. The one side portion of the bed main body is provided with a first cooling liquid space for circulating a cooling liquid corresponding to the first main shaft portion, and the other side portion of the bed main body is provided with the first cooling liquid space. A second cooling liquid space for circulating the cooling liquid is provided corresponding to the two main shaft portions, and the reinforcing connection member has a cooling liquid for supplying the cooling liquid to the first and second cooling liquid spaces. The machine tool according to claim 5, wherein a supply flow path is provided, and a cooling liquid return flow path for returning the cooling liquid from the first and second cooling liquid spaces is provided. .

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