JP2003019639A - Coolant injection device for machine tool and machine tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a coolant injection device for a machine tool capable of obtaining a desired coolant injection structure without finding difficulties in machining and manufacture and the machine tool. SOLUTION: This coolant injection device for the machine tool is constituted in such a way that a coolant supply passage is related to a movable carriage from the direction crossing the direction of one axis which is the direction of moving of the movable carriage and an arbitrary coolant receive port in a coolant injection passage selected due to the move of the movable carriage in the direction of one axis coincides with a coolant supply port in the coolant supply passage.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coolant ejecting device for a machine tool and a machine tool, and more particularly, to a coolant ejecting path corresponding to a plurality of machining tools. The present invention relates to an improved structure for switching ejection paths.

[0002]

2. Description of the Related Art As a coolant jetting device in a machine tool, there is, for example, one disclosed in Japanese Patent Laid-Open No. 2000-126981. The coolant ejection device disclosed herein has the following configuration. First, there is a tool holder, and this tool holder is configured to be movable in one axis direction. A plurality of machining tools are attached to the tool holder, and a plurality of coolant ejection nozzles are arranged so as to correspond to the machining tools.

On the other hand, a coolant supply pipe is laid along the moving direction of the tool holder, and its tip is movably inserted into a through hole formed in the tool holder in the form of a long fine hole. A coolant supply port is formed at a predetermined position on the tip of the coolant supply pipe. on the other hand,
On the side of the through hole, there are formed a plurality of coolant receiving ports that communicate with the plurality of coolant ejection nozzles.

When the tool holder is moved uniaxially in order to select an arbitrary machining tool, the coolant supply pipe and the through hole of the tool holder relatively move, and the predetermined coolant receiving port becomes the coolant supplying port. It will be in a matched state.
As a result, the coolant supply pipe, the coolant supply port,
Through the coolant receiving port, the coolant is supplied and jetted to the coolant jet nozzle corresponding to the selected machining tool.

[0005]

The above-mentioned conventional structure has the following problems. That is, JP 2000-
In the case of the coolant jetting device disclosed in Japanese Patent No. 126981, the coolant supply pipe and the through hole on the tool holder side are partially fitted so as to be movable along the uniaxial direction. By the relative movement in the direction,
The position of the coolant supply port of the coolant supply pipe and the position of the arbitrary coolant reception port on the side of the through hole of the tool holder are matched. However, in the case of actually adopting such a configuration, long through-holes in the form of long pores must be machined with high precision in parallel along the moving direction of the tool holder, and machining is difficult. There was a problem of being lost. This also applies to the coolant supply pipe.
That is, in order to smoothly perform the operation in which the coolant supply pipe slides in the through hole and is positioned at the predetermined position, the coolant supply pipe is also curved and is parallel to the movement direction of the tool holder. There was a problem that it was necessary to assemble with accuracy. The problem of this kind becomes more remarkable as the number of machining tools increases and the axial lengths of the coolant supply pipe and the through hole become longer.

The present invention has been made on the basis of the above points, and its object is to make it possible to jet a desired coolant without increasing the number of working tools without difficulty in working / manufacturing. It is an object of the present invention to provide a coolant ejecting device for a machine tool and a machine tool capable of easily obtaining a structure.

[0007]

In order to achieve the above object, a coolant jetting device for a machine tool according to claim 1 of the present invention comprises a plurality of machining tools and a plurality of machining tools corresponding to the plurality of machining tools. A moving table that has a coolant ejection path and is configured to select an arbitrary machining tool and a corresponding coolant ejection path by moving in one axis direction, and a coolant supply that supplies the coolant to the selected coolant ejection path. A coolant spraying device of a machine tool provided with a path, and the coolant supply path is related to the movable table side from a direction intersecting the uniaxial direction, and is selected by moving the movable table in the uniaxial direction. The coolant inlet of the coolant ejection path is aligned with the coolant inlet of the coolant supply path. It is an. According to a second aspect of the present invention, there is provided a coolant ejecting device for a machine tool according to the first aspect, wherein a branch rail is provided on the movable table side, and the branch rail is arranged in a direction parallel to the uniaxial direction. A slide contact surface that slides in contact with the coolant supply port of the coolant supply path is provided, and a plurality of through holes that function as coolant inlets of the plurality of coolant ejection paths and that extend in a direction intersecting the uniaxial direction are provided. It is characterized by that. According to a third aspect of the present invention, there is provided a coolant injection device for a machine tool according to the second aspect, wherein a pressure pad is arranged at a tip end portion of the coolant supply path, and the pressure pad is an elastic member. According to the present invention, it is pressed and arranged so as to be slidably contactable with the sliding contact surface of the branch rail. According to a fourth aspect of the present invention, there is provided a coolant ejecting device for a machine tool according to the second aspect, wherein the tip end portion of the coolant supply path allows the branch rail to move in a uniaxial direction on the moving base side. It is characterized in that they are mechanically connected in the opened state. A machine tool according to a fifth aspect of the present invention includes a plurality of machining tools and a plurality of coolant ejection paths corresponding to the plurality of machining tools. A moving table configured to select a coolant jetting path, a driving unit that drives the moving table in the uniaxial direction, and a coolant supply path that supplies the coolant to the selected coolant jetting path. In a machine tool, a coolant in an arbitrary coolant ejection path selected by relating the coolant supply path to the movable table side from a direction intersecting the uniaxial direction and moving the movable table in the uniaxial direction by the driving means. It is characterized in that the inlet is adapted to coincide with the coolant supply port of the coolant supply path. A machine tool according to a sixth aspect is the machine tool according to the fifth aspect, wherein the movable table is provided with a comb-shaped tool rest, and the X-axis direction which is a cutting direction and the X-axis direction.
It is characterized in that it is movable in the Y-axis direction which is orthogonal to the axial direction and is the machining tool selection direction, and the uniaxial direction is the Y-axis direction. A machine tool according to a seventh aspect is the machine tool according to the fifth or sixth aspect, wherein a branch rail is provided on the movable table side, and the branch rail is provided in the coolant supply path in a direction parallel to the uniaxial direction. A plurality of through holes that have a sliding contact surface that slides in contact with the coolant supply port and that function as coolant inlets of the plurality of coolant ejection paths and that extend in a direction intersecting the uniaxial direction; It is a feature. A machine tool according to an eighth aspect is the machine tool according to the seventh aspect, wherein a pressing pad is arranged at a tip end portion of the coolant supply path, and the pressing pad is made of an elastic member to make a sliding contact surface of the branch rail. It is characterized in that it is pressed and arranged in a state capable of sliding contact with. Also, claim 9
The machine tool according to claim 7, wherein
The tip end of the coolant supply path is mechanically connected to the branch rail in a state in which the branch rail is allowed to move in the uniaxial direction on the moving table side.

That is, in the case of the coolant ejecting apparatus for machine tools according to the present invention, the coolant supply path is related to the moving base in a direction intersecting the uniaxial direction, and is selected by moving the moving base in the uniaxial direction. Since the coolant receiving port of the arbitrary coolant jetting path is made to coincide with the coolant supplying port of the coolant feeding path, long pores are provided as in the case of the coolant jetting device disclosed in Japanese Patent Laid-Open No. 2000-126981. It is not necessary to process / manufacture the through-hole and the coolant supply pipe with high accuracy, and it is possible to obtain a configuration for switching the coolant ejection path by simple processing / manufacturing. This is particularly effective when the number of processing tools is increased. or,
A branch rail is provided on the movable table side, and the branch rail has a sliding contact surface that slides in contact with the coolant supply port of the coolant supply path in a direction parallel to the uniaxial direction, and the coolant of the plurality of coolant ejection paths. It is conceivable that the structure includes a plurality of through holes that function as a receiving port and extend in a direction intersecting the uniaxial direction. At that time, when a pressing pad is arranged at the tip of the coolant supply path and the pressing pad is pressed by an elastic member so as to abut against the branch rail side, the branch pad side There is no problem even if the flatness of the pressing surface or the parallelism of the pressing surface along the moving direction is slightly impaired, and the coolant does not leak. Then, it is possible to provide a smooth operation in the uniaxial direction on the side of the moving table. Also, when the tip of the coolant supply path is mechanically connected to the branch rail side while allowing the pedestal side to move in the uniaxial direction, this reduces the number of parts and simplifies the configuration. Can be planned. Claims 5 to 9 claim the present invention as a machine tool. At that time, the machine tool is equipped with a comb-shaped tool rest, and the direction of cutting is X.
Y which is a machining tool selection direction orthogonal to the axial direction and the X-axis direction
It is conceivable that it can move in the axial direction.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION A first embodiment of the present invention will be described below with reference to FIGS. 1 is a front view showing the configuration of a tool rest and its vicinity of a numerically controlled automatic lathe incorporating the coolant ejection device according to the present embodiment, FIG. 2 is a view taken along the line II-II in FIG. 1, and FIG. It is a figure which notches and shows a part III part.

First, there is a bed 1, and a first moving table (X-axis table) 3 is mounted on the bed 1 so as to be movable in the X-axis direction (vertical direction in FIGS. 1 and 2). That is, a pair of X-axis rails 5 and 5 are laid on the bed 1. On the other hand, two guides 7, 7 are attached on the left and right sides of the first moving table 3 (two guides 7, 7 on one side are shown in FIG. 2). The left and right two guides 7, 7 are movably engaged with the X-axis rails 5, 5. Then, the first moving table 3 is driven by a drive motor (not shown) via a ball screw / ball nut mechanism (not shown).
Drive control. As a result, the first moving table 3 passes through the pair of left and right guides 7, 7 and the pair of rails 5,
5 along the X-axis direction.

A second movable table (Y-axis table) 9 is installed on the first movable table 3 so as to be movable in the Y-axis direction (left-right direction in FIG. 1) orthogonal to the X-axis direction. That is, the first
A pair of Y-axis rails 11, 11 are laid on the moving table 3. On the other hand, two upper and lower guides 13 and 13 are attached to the second moving table 9 side (two guides 13 and 13 on one side are shown in FIG. 2). The upper and lower two guides 13, 13 are movably engaged with the pair of Y-axis rails 11, 11. Then, a drive motor (not shown) drives and controls the second moving table 9 via a ball screw / ball nut mechanism including a ball screw 15 and a ball nut 17. As a result, the second moving table 9 passes through the above-mentioned two upper and lower two guides 13, 13.
It moves in the Y-axis direction along the pair of Y-axis rails 11, 11.

A comb-shaped tool rest 19 is attached and fixed to the second moving table 9, and a plurality of machining tools 21a, 21b, 21c and 21d are attached to the comb-shaped tool rest 19 in a comb-like shape. Has been. Further, a tool rest 23 for a drilling tool is attached and fixed to the second movable table 9, and three tooling tools 25 for drilling are mounted on the tool rest 23 for a drilling tool.
a, 25b, 25c are attached.

Further, the plurality of processing tools 21a, 21
b, 21c, 21d and machining tools 25a, 25b, 25
In the vicinity of c, the coolant jet nozzles 27a, 27a,
27b, 27c, 27d, 27e, 27f, 27g are arranged. These coolant ejection nozzles 27a, 2
The coolant is jetted to the processing position via 7b, 27c, 27d, 27e, 27f and 27g.

The comb-shaped tool rest 19 is formed with coolant passages 29a, 29b, 29c, 29d communicating with the respective coolant ejection nozzles 27a, 27b, 27c, 27d and for the drilling tool. The coolant jet nozzles 27e, 27f, 27g are also provided on the tool rest 23.
Coolant passages 29e, 29f, and 29g communicating with each other are formed. Then, the respective coolant flow paths 29a, 29b, 29c, 29d, 29e, 29f, 2
9g includes pipe fittings 30a, 30b, 30c, 30d, 3
0e, 30f, 30g through the coolant pipe 31a,
31b, 31c, 31d, 31e, 31f, 31g are connected.

A branch rail 33 is attached to the upper end of the second moving table 9. In this branch rail 33,
Coolant flow paths 35a, 35b, 35c, 35d, 35
e, 35f, 35g are formed, and the coolant pipes 31a, 31b, 31c, 31d, 31e, 31 are formed.
f and 31g are the coolant flow paths 35a and 35b,
35c, 35d, 35e, 35f, 35g, pipe fitting 3
2a, 32b, 32c, 32d, 32e, 32f, 32
connected via g. The coolant flow path 35
a, 35b, 35c, 35d, 35e, 35f, 35g
The upper end of the functions as a coolant inlet.

A coolant supply block 41 is arranged on the branch rail 33. The coolant supply block 41 includes an arm 43 whose one end is fixed to the first moving table 3. A stepped hole 45 is formed at the tip of the arm 43, and the stepped hole 45 is a large diameter hole 4.
6 and a small diameter hole 47, and a stepped portion 48 is provided between the large diameter hole 46 and the small diameter hole 47. In the large diameter hole 46, a pressing pad 49 has a coil spring 51.
Is furnished through. The pressing pad 49 is constantly pressed and urged against the upper surface of the branch rail 33 by the coil spring 51. The pressing pad 49 has a through hole 5
1 is formed. The lower end of the through hole 51 functions as a coolant supply port.

A coolant hose 61 is laid above the coolant supply block 41. The coolant hose 61 is connected to a coolant supply device (not shown). A metal fitting 63 is connected to the tip of the coolant hose 61. A male screw portion 63a is formed at the tip of the metal fitting 63, and the male screw portion 63a is screwed into the female screw portion 47a of the through hole 47.

A guide bush 7 is provided below the bed 3.
1 is installed and the work 73 held by a main shaft (not shown) movably installed in the Z-axis direction has its tip end supported by this guide bush.

The operation will be described based on the above configuration. First, a processing tool is selected to perform desired processing.
That is, the second moving table 9 is controlled to move in the Y-axis direction to control the machining tools 21a, 21b, 21c, 21d, and the machining tool 25.
A desired machining tool is selected from a, 25b, and 25c. In FIG. 1, the processing tool 21c is in a selected state. Due to the movement of the second moving table 9 in the Y-axis direction, the pressing pad 49 of the coolant supply block 41 and the branch rail 33 come into sliding contact with each other, so that the pressing pad 4 is pressed.
9 is positioned at a position corresponding to the coolant passage 35c corresponding to the selected machining tool 21c. That is, the coolant supply port and the coolant receiving port are in the same state.

Then, the desired processing is performed by using the selected processing tool 21c. At that time, the coolant hose 61, the metal fitting 63, and the through hole 5 of the pressing pad 49.
The coolant is jetted toward the processing position through the coolant passage 35c, the coolant pipe 31c, the coolant passage 29c, and the coolant jet nozzle 27c. In addition, the machining tool 21c is cut in the cutting direction, that is, X
Although it is moved by a predetermined amount in the axial direction, in that case, the entire coolant supply block 41 is moved by a predetermined amount in the X-axis direction. Further, the pressing pad 49 is constantly pressed and urged against the upper surface of the branch rail 33 by the coil spring 51 so that the pressed state is maintained.

Further, the processing tools 21 other than the processing tool 21c
a, 21b, 21d, processing tools 25a, 25b, 25c
The same applies when selecting. That is, the second moving table 9 moves in the Y-axis direction, and at that time, the pressing pad 49 and the branch rail 33 make sliding contact with each other and are positioned at a predetermined position.

As described above, according to this embodiment, the following effects can be obtained. First, the coolant supply unit from the coolant hose 61 side, in the case of this embodiment, the pressing pad 49 of the coolant supply block 41 is brought into contact with and arranged in a direction orthogonal to the sliding direction of the sliding branch rail 33. Therefore, Japanese Unexamined Patent Application Publication No.
There is no need for through-holes or coolant supply pipes, which are long pores that are difficult to process and manufacture, as in the case of the coolant spraying device disclosed in JP-A-00-126981, and extremely simple processing and The desired structure for switching can be obtained in fabrication. In particular, it is extremely effective when the number of processing tools is large as in this embodiment.
In the case of the branch rail 33, relatively short coolant flow paths 35a, 35b, 35c, 35d, 35e, 35.
Since only f and 35g are formed, its processing and production are easy. On the other hand, the above-mentioned JP-A-2000-126
In the case of the conventional coolant spraying device disclosed in Japanese Patent Publication No. 981), the coolant supply pipe must be configured so as to be guided and slidable in the long pores. High processing precision is required for both. In the case of this embodiment, the pressing pad 49 is constantly urged and pressed by the coil spring 51 against the upper surface of the branch rail 33. There is no problem even if the parallelism of the upper surface along with is slightly impaired, and the smoothness of the sliding operation is not impaired by the branch rail 33 and the pressing pad 49 being in close contact with each other.

Next, a second embodiment of the present invention will be described with reference to FIG. In the case of the first embodiment,
Although the pressing pad 49 of the coolant supply block 41 is configured to be pressed by the coil spring 51, in the case of the second embodiment, the structure is such that the coolant supply block side is mechanically connected to the branch rail side. It is the one. Further, in the case of the conventional coolant ejection device disclosed in Japanese Patent Application Laid-Open No. 2000-126981, the coolant supply pipe must be configured so as to be guided and slidable in the long pores. High processing accuracy is required for both the hole and the coolant supply pipe,
The processing accuracy required in the case of this embodiment is sufficiently relaxed.

First, the branch rail 133 in this embodiment has a substantially circular cross section (a shape in which a lower end portion of the circle is partially removed). Also, the arm 143
The recess 145 has a substantially circular cross-sectional shape (a shape in which the lower end of the circle is partially deleted), and the bearing function can be exhibited so that the branch rail 133 can slide. . Since other configurations are the same as those in the case of the first embodiment, the same parts are designated by the same reference numerals and the description thereof will be omitted.

In this case, the movement of the second moving table 9 in the Y-axis direction causes the branch rail 133 and the recess 145 of the arm 143 to make sliding contact. And this second
Also in the case of the embodiment, the branch rail 133 that slides the coolant supply portion from the coolant hose 61 side
Since it is connected from the direction orthogonal to the slide direction, it is difficult to process and manufacture the coolant for a long time as in the case of the coolant jetting device disclosed in Japanese Patent Application Laid-Open No. 2000-126981. There is no need for through holes that are pores or coolant supply pipes, and it is possible to obtain the desired structure for switching with simple processing and manufacturing.
The same effect as in the case of the first embodiment can be obtained. Further, in the case of this embodiment, since the branch rail 133 and the arm 143 side are mechanically connected in a slidable state, a certain degree of machining accuracy is required, but the first embodiment Compared with the configuration described in (1), the configuration can be simplified by eliminating the need for a pressing pad and a coil spring. Also, regarding the above processing accuracy,
In the case of the conventional coolant spraying device disclosed in the above-mentioned Japanese Patent Laid-Open No. 2000-126981, the coolant supply pipe must be configured so as to be guided and slidable in the long pores. This is sufficiently relaxed compared to the requirement of high processing accuracy in both the coolant supply pipe and the coolant supply pipe.

Next, a third embodiment of the present invention will be described with reference to FIG. In the case of this embodiment, the branch rails of the first and second embodiments are integrally provided on the second moving base 9. In addition, the coolant pipes 31a, 31b, 31c, 31d, 31e, 3 in the first and second embodiments.
Coolant passages 81a, 81 without 1f, 31g
b, 81c, 81d, 81e, 81f, 81g are provided.

Since the other construction is the same as that of the first and second embodiments, the same parts are designated by the same reference numerals and the description thereof will be omitted. Also in the third embodiment as described above, the same effects as those in the first and second embodiments can be obtained, and
The structure is simplified by integrating the branch rails and deleting the coolant piping.

The present invention is not limited to the first to third embodiments. In the first and second embodiments, the numerically controlled automatic lathe provided with the tool rest in a state of being movable in the X-axis direction and the Y-axis direction orthogonal to each other has been described as an example, but the present invention is not limited thereto. It is applicable to machine tools of various configurations, not just ones.

[0029]

As described above in detail, according to the coolant ejecting apparatus for a machine tool and the machine tool according to the present invention, the coolant supply path is related to the movable base in a direction orthogonal to the uniaxial direction which is the moving direction of the movable base. Then, the coolant receiving port of the arbitrary coolant jetting route selected by the movement of the moving table in the one axis direction is made to coincide with the coolant supplying port of the coolant supplying route.
Unlike the case of the coolant spraying device disclosed in Japanese Patent No. 26981, it is not necessary to form a through hole, which is a long fine hole, or a coolant pipe with high precision, and the coolant spraying route is switched by a simple working / manufacturing process. The desired configuration for can be obtained. This is particularly effective when the number of processing tools is increased. Further, when the branch rail is provided on the moving table side, the coolant ejection path switching structure having the sliding contact surface can be obtained by simple processing / manufacturing. Further, in the case where the pressing pad is arranged at the tip of the coolant supply path and the pressing pad is pressed by the elastic member so as to contact and be arranged on the branch rail side, the pressing surface of the branch rail side is Even if the flatness and the parallelism of the pressing surface along the movement direction are slightly impaired, there is no problem, the coolant does not leak, and it is possible to provide smooth movement in the uniaxial direction on the moving table side. it can. Also, when the tip of the coolant supply path is mechanically connected to the branch rail side while allowing the pedestal side to move in the uniaxial direction, this reduces the number of parts and simplifies the configuration. Can be planned.

[Brief description of drawings]

FIG. 1 is a view showing a first embodiment of the present invention and is a partial front view showing a configuration of a tool post and a coolant ejection device in an automatic lathe.

FIG. 2 is a view showing the first embodiment of the present invention and is a view taken along the line II-II in FIG.

FIG. 3 is a view showing the first embodiment of the present invention, and is a view showing in detail a part III of FIG. 2 by cutting away.

FIG. 4 is a view showing a second embodiment of the present invention, and is a view showing in detail a part of the structure of a coolant ejection device with a part cut away.

FIG. 5 is a view showing a third embodiment of the present invention and is a partial side view showing a configuration of a tool rest and a coolant ejection device in an automatic lathe.

[Explanation of symbols]

9 2nd moving stand (moving stand) 19 Comb-shaped tool rests 21a, 21b, 21c, 21d Machining tool 23 Machining tool tool rests 25a, 25b, 25c Machining tools 27a, 27b, 27c, 27d, 27e, 27f, 2
7g Coolant ejection nozzles 29a, 29b, 29c, 29d, 29e, 29f, 2
9g Coolant flow paths 31a, 31b, 31c, 31d, 31e, 31f, 3
1 g Coolant piping 33 Branch rails 35a, 35b, 35c, 35d, 35e, 35f, 3
5g Coolant flow path 41 Coolant supply block 43 Arm 49 Pressing pad 51 Coil spring 61 Coolant supply hose 63 Metal fitting

Claims (9)

[Claims] 1. A plurality of machining tools are provided, and a plurality of coolant ejection paths corresponding to the plurality of machining tools are provided. By moving in a uniaxial direction, an arbitrary machining tool and a coolant ejection path corresponding thereto are formed. In a coolant jetting device of a machine tool, comprising: a moving table configured to be selected; and a coolant supply route for supplying a coolant to the selected coolant jetting route, the coolant feeding route intersects the uniaxial direction. From the direction to the moving table side, the coolant receiving port of the arbitrary coolant ejection path selected by the movement of the moving table in the one axis direction is matched with the coolant supply port of the coolant supplying path. Coolant injection device for machine tools. 2. The coolant ejection device for a machine tool according to claim 1, wherein a branch rail is provided on the moving table side, and the branch rail slides in a direction parallel to the uniaxial direction with a coolant supply port of the coolant supply path. A machine tool having a sliding contact surface in contact with each other and having a plurality of through holes extending in a direction intersecting the uniaxial direction and functioning as a coolant receiving port of the plurality of coolant ejection paths. Coolant spray device. 3. The coolant ejection device for a machine tool according to claim 2, wherein a pressing pad is arranged at a tip end portion of the coolant supply path, and the pressing pad is provided on the sliding contact surface of the branch rail by an elastic member. A coolant ejecting device for machine tools, which is pressed and arranged so that it can slide against it. 4. The coolant ejecting device for a machine tool according to claim 2, wherein a tip end portion of the coolant supply path is mechanically connected to the branch rail in a state in which the branch rail is allowed to move in a uniaxial direction on a moving base side. A coolant spray device for machine tools. 5. A plurality of machining tools are provided, and a plurality of coolant ejection paths corresponding to the plurality of machining tools are provided. By moving in a uniaxial direction, an arbitrary machining tool and a corresponding coolant ejection path are formed. A machine tool comprising: a moving table configured to be selected; a driving unit that drives the moving table in the uniaxial direction; and a coolant supply path that supplies a coolant to the selected coolant jetting path. The coolant receiving path is connected to the moving table side from the direction intersecting the uniaxial direction, and the coolant receiving port of an arbitrary coolant ejection path selected by moving the moving table in the uniaxial direction by the driving means is the coolant receiving port. A machine tool characterized in that it matches the coolant supply port of the supply path. 6. The machine tool according to claim 5, wherein the movable table is provided with a comb-shaped tool post, and the X-axis direction which is a cutting direction and the machining tool selection direction which is orthogonal to the X-axis direction are Y-directions. A machine tool, wherein the machine tool is movable in an axial direction, and the one axis direction is the Y axis direction. 7. The machine tool according to claim 5, wherein a branch rail is provided on the movable table side, and the branch rail slides in a direction parallel to the uniaxial direction with a coolant supply port of the coolant supply path. A machine tool having a sliding contact surface in contact with each other and having a plurality of through holes extending in a direction intersecting the uniaxial direction and functioning as a coolant receiving port of the plurality of coolant ejection paths. . 8. The machine tool according to claim 7, wherein a pressing pad is arranged at a tip end portion of the coolant supply path, and the pressing pad is slidably contacted with a sliding contact surface of the branch rail by an elastic member. A machine tool characterized by being pressed and placed in a possible state. 9. The machine tool according to claim 7, wherein the tip end portion of the coolant supply path is mechanically connected to the branch rail in a state in which the branch rail is allowed to move in the uniaxial direction on the moving table side. Machine tool to be.