JP2001129733A - Moving body guide device for machine tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a moving body guide device for a simple structure, capable of working a work piece with high accuracy and saving a space for a machine tool. SOLUTION: This moving body guide device comprises a tool rest 10 moving for the working of a work piece, a magnet 32 mounted on one of the tool rest 10 and a support 20, a coil 31 mounted on the other of the tool rest 10 and the support 20 in opposition to the magnet 32, and a body to be attracted constantly attracted by the magnet 32 within a moving range of the tool rest 10, and the magnet 32 has the attraction force producing the reverse angular moment for canceling the angular moment M for floating the tool rest from a guide member 10a, when the angular moment M acts on the tool rest 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a guide device for guiding the movement of a moving body such as a table, a saddle, a tool rest, and a headstock in a machine tool, particularly a small machine tool.

[0002]

2. Description of the Related Art In recent years, in the field of machine tools, due to demands for space-saving and high-precision machining, a drive device for moving a table, a saddle, a tool rest, a headstock, and the like has been made compact and the positioning accuracy of tools and workpieces has been improved. Has been requested.

[0003] A moving body such as a tool rest or a headstock provided in a machine tool is moved by a driving body such as a servomotor, a driving device for transmitting the driving of the driving body to the moving body, and a driving device for driving the driving body. This is performed by a guide device that guides the movement of the moving body.

FIGS. 7 and 8 are views showing a conventional example of a driving device and a guide device for moving a tool post as a moving body. The guide device shown in FIG.
0 is moved along the guide rail 110a.
Support 12 attached to machine tool bed or saddle
0, a tool rest 110 supported by the support body 120,
Two guide rails 110 a are provided on one side surface of the support body 120 and guide the movement of the tool rest 110.

The guide rail 110a is formed to have a rhombic cross section, and is symmetrically arranged on both sides in the width direction of the tool rest 110. The support 120 and the tool rest 11
V-shaped grooves 111 and 121 are formed on the opposing surface of the groove 0, and the guide rail 110a is engaged with the grooves 111 and 121. Such a guide device is generally called a "double V type" and is generally used for a guide device of a moving body of a machine tool because of its excellent linear guideability. In addition, the driving device includes a screw hole 112 formed in the center of the tool post 110.
Is screwed into the screw hole 112 and the guide rail 110
a screw shaft 122 extending in the same direction as
And a servomotor (not shown) as a driving body having a rotating shaft connected to one end of the motor. According to the above aspect,
When the servomotor is driven, the screw shaft 122 rotates to move the tool rest 110 forward and backward along the guide rail 110a.

In the above-described machine tool, the main component force P in the cutting direction and the back component force F in the cutting direction act on the tool T during the cutting of the workpiece, and the cutting force is exerted on the tool T by these forces P and F. A rotational moment is generated on the table 110. In this case, the tool rest 11 like a small machine tool is used.
If the weight of 0 is light, the tool rest 110 may be lifted off the guide rail 110a by the rotational moment. Further, it is necessary to prevent the tool rest 110 from easily falling off the guide rail 110a due to vibrations when processing the work or moving the tool rest 110.

Therefore, as shown in FIGS. 7A and 7B,
A back plate 115 as a holding member is provided on both sides of the turret 110, and the turret 1
10 was prevented from rising or falling off the guide rail 110a.

However, the tool rest 110 is connected to the guide rail 11
It is necessary to provide a small amount of gap S between the back plate 115 and the support body 120 because it is necessary to move the back plate 115 smoothly along 0a. Therefore, when the rotation moment acts, there is a problem that the tool rest 110 is lifted from the guide rail 110a by the gap S, and the machining accuracy of the work is reduced. Even if the gap S is adjusted to be as small as possible at the time of assembling the machine tool, the tool post 110 or the support 120 is worn out due to long-term use, the gap S is widened, and the machining accuracy is reduced.

The guide device shown in FIG. 8 uses a linear ball guide 116a which is a linear guide instead of the guide rail 110a in order to eliminate the gap S which is a problem of the guide device shown in FIG. . In such a guide device, the back plate 115 as shown in FIG. 7 can be unnecessary, but it is difficult to suppress mechanical vibration due to cutting resistance generated at the time of cutting, and it is not suitable for high-precision machining. In order to suppress the mechanical vibration as described above as much as possible, it is necessary to use a rigid rigid ball guide 116a, but the rigid rigid ball guide 116a is expensive and increases the size of the machine tool. There was a problem. Further, even when the linear ball guide 116a is used, a gap is generated due to abrasion due to long-term use and the machining accuracy is reduced, as in the guide device shown in FIG.

[0010]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and does not require any means for preventing a movable body from rising, such as a back plate, and is a machine which is generated by cutting resistance or the like during processing. To provide a moving body guide device that can suppress vibration and realize high machining accuracy, and can also save space and reduce the cost of a machine tool. It is an object of the present invention to provide a moving body guide device capable of suppressing the backlash of a moving body due to abrasion and maintaining a high machining accuracy for a long period of time even when the abrasion occurs.

[0011]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a moving body guide device for a machine tool according to the present invention comprises a moving body that moves to process a work, and a support that supports the moving body. And a guide member provided between the support and the movable body and guiding the movement of the movable body, the guide device for a movable body in a machine tool, wherein one of the movable body and the support body is provided. A magnet provided on the other side of the moving body or the support, a coil opposed to the magnet, and an attracted body which is always attracted to the magnet within a moving range of the moving body. Then, the magnet has a configuration in which even if a rotational moment that emerges from the guide member acts on the moving body, the magnet has an attractive force that generates a rotational torque in the opposite direction to cancel the rotational moment. That.

According to this configuration, even if a rotational moment is generated in a moving body such as a tool rest due to a main component force or a back component force of a tool when processing a workpiece, the magnet cancels the rotational moment in the opposite direction. Since it generates a rotational moment,
The lifting of the moving body can be prevented without the need to provide a holding member such as a back plate, so that the configuration of the guide device can be simplified and high-precision machining of the work can be performed. Further, since the attracting force of the magnet is constantly urged to the moving body, even if the moving body or the like is worn, it is possible to suppress rattling of the moving body due to wear. Therefore, for example, by inputting the amount of positional displacement between the workpiece and the cutting tool due to wear to the control device as a correction value and performing correction, high-precision processing can be maintained for a long period of time. Furthermore, since a linear driving device can be configured by the magnet and the coil, it is not necessary to provide a driving body such as a motor outside the moving body, and the driving device is made compact to save the space of the machine tool. Can be.

According to a second aspect of the present invention, the guide member is a guide rail having a V-shaped projection, and at least one of the movable body and the supporter has a V-shaped engagement with the guide rail. The groove is formed in the same direction. According to this configuration, by employing a so-called double V-shaped guide device, excellent linear guideability can be obtained.

According to a third aspect of the present invention, the guide member is a guide rail having a semi-cylindrical protrusion, and at least one of the moving body and the support is engaged with the protruding guide rail. It has a configuration in which U-shaped grooves are formed in the same direction. As described above, by adopting the guide device using the combination of the semi-cylindrical projection and the double V-shaped groove, excellent linear guideability can be obtained, and the sliding resistance when the moving body moves is significantly reduced. Can be reduced.

According to a fourth aspect of the present invention, a portion in which the V-shaped groove slides with the projection by the movement of the moving body is formed by a resin molding method using the groove and the projection as a mold. There is a configuration. According to this configuration, it is possible to ensure the combination accuracy of the protrusion of the guide device and the V-shaped groove, high accuracy without error, and high-precision sliding without mechanical processing or manual work. Since the surface can be formed, the guide device can be obtained with excellent workability and at low cost.

According to a fifth aspect of the present invention, an air flow passage is provided between the support and the moving body, and the compressed air flows through the air flow passage when the moving body is moved. According to this configuration, when the moving body is moved, the compressed air urges the moving body in a direction to lift the moving body from the guide member, so that the moving body is easily moved, and the moving body can be moved at a high speed. Also, the current supplied to the coil can be reduced, and the temperature rise due to the heat generated by the coil is reduced, so that the moving body can be positioned with high precision.

In the case of claims 2 to 4, claim 6
As shown in (1), the air flow passage may be provided between the guide rail and the groove. As described above, according to the present invention, a linear motor is adopted as a driving device of a moving body, and a magnet constituting the linear motor is used as it is for holding the posture of the moving body as it is, thereby simplifying and reducing the size of the machine tool. A plurality of problems of high-precision machining and long-term maintenance of high-precision machining can be solved at once.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to the drawings. 1 to 6
In the drawings, the same reference numerals are given to the same portions and the same members, and overlapping descriptions of the portions and the members are omitted. FIG. 1 is a front view of a guide device for a moving body according to a first embodiment of the present invention, and FIG. 2 is a schematic plan view of a machine tool having a comb-shaped tool rest.

In FIGS. 1 and 2, for convenience of explanation, the same direction as the axis of the main shaft 5 is defined as the Z-axis direction, and the directions perpendicular thereto are defined as the X-axis direction and the Y-axis direction. First, the configuration of the machine tool 1 to which the guide device of the present invention is applied will be described with reference to FIG.

On the bed 2 of the machine tool 1, a guide rail 3a is laid in the X-axis direction, and guide rails 4a and 6a are laid in the Z-axis direction. The saddle 3 is provided movably in the X-axis direction along the guide rail 3a, and the comb-shaped tool rest 10 moves along the Y-axis direction guide rail 10a erected on one side surface of the saddle 3. It is provided freely. Tool T for processing a workpiece (not shown)
Is held by a tool rest 10 that is movable in the X-axis direction and the Y-axis direction.

A headstock 4 is provided movably in the Z-axis direction while being guided by a guide rail 4a. Headstock 4
Supports the main shaft 5 rotatably. The work is inserted through a through hole (not shown) formed in the center of the main shaft 5, and its tip is centered and held by a guide bush 8 which is a work holding member.

A second saddle 6 is provided movably in the Z-axis direction while being guided by a guide rail 6a. One side of the saddle 6 has a guide rail 10a 'in the Y-axis direction.
A tool rest 10 'having the same configuration as the tool rest 10 is provided movably along the guide rail 10a'. This tool rest 10 'also holds a tool T for processing a work (not shown).

In the machine tool 1 having the above-described configuration, the work projects from the guide bush 8 by a required length, and the work that rotates with the rotation of the main shaft 5 is machined by the predetermined tools T of the two tool rests 10 and 10 '. At this time, the tip of the tool T and the guide bush 8 are positioned so that a constant interval is always maintained in the Z-axis direction.

Next, the configuration of the guide device in this embodiment will be described in detail with reference to FIG. The tool rest 10 holding the tool T in a comb shape is movable along two guide rails 10a as guide members supported by the support 20. The guide rail 10a is formed in a prismatic shape,
It is engaged with a V-shaped groove 11 formed in the tool rest 10. The sliding surface of the groove 11 that slides on the guide rail 10a by the movement of the tool rest 10 is used to smoothly move the tool rest 10 and to attenuate mechanical vibrations caused by cutting resistance when machining a work (not shown). It is preferable to provide a sliding bearing.

Grooves 13 and 23 are formed in the tool rest 10 and the support 20 in the Y-axis direction, respectively. The coil 31 is inserted into the groove 13 on the tool post 10 side, and the groove 2
3 is provided with a magnet 32. The magnet 32 has N pole and S
The poles are arranged so as to alternately face the coil 31 side over the entire length in the moving area of the tool rest 10. This magnet 32
And the coil 31 form a linear drive section (linear motor) 30.

The support 20 is formed of a metal such as iron having a property of being attracted to the magnet 32. Therefore, when the tool rest 10 is placed on the guide rail 10a, the magnet 32
The tool rest 10 is pressed against the guide rail 10a by the attraction force. In this embodiment, the support 20 constitutes the object to be adsorbed. However, an object to be adsorbed, for example, an iron plate, which is separate from the support 20, is provided in the groove 13 over the entire length of the moving area of the tool rest 10. It may be a thing.

In order to prevent the tool rest 10 from dropping due to an excessive impact generated when the tool T collides with the work, for example, as shown in FIG.
Are formed at both ends of the tool rest 10, and the engaged portions 25 that engage with the engaging portions 15 are supported by the support 2.
It is good to form to 0.

When the work is machined, forces such as the main component force P and the back component force F act on the tool T, and this force generates a rotational moment for lifting the tool rest 10 from the guide rail 10a. The attraction force of the magnet 32 is
The maximum torque acting on zero must be canceled so that the tool rest 10 does not rise above the guide rail 10a. That is, the following conditions must be satisfied.

The maximum value of the main component acting on the tool T is defined as Pma
x, the maximum value of the back force is Fmax, the tool post 1 from the tip of the tool T
Assuming that the horizontal distance to the distant guide rail 10a serving as the rotation fulcrum of 0 is L1, the vertical distance is H1, the rotational moment generated by other elements such as the own weight of the tool rest 10 and the tool T is k, the tool rest 10 The maximum value Mmax of the rotating moment acting is represented by Mmax = Pmax × L1 + Fmax × H1 + k.

On the other hand, assuming that the attractive force of the magnet 32 is R and the horizontal distance between the load center and the guide rail 10a is L2 when the attractive force R is assumed to be a concentrated load, the attractive force R of the magnet 32 is In order to prevent 10 rotations, at least the condition of R> Mmax / L2 must be satisfied.

The tool post 1 is moved by the attraction force of the magnet 32.
Even if 0 is constantly pressed against the guide rail 10a,
Turret 1 smoothly while ensuring a holding force greater than Mmax
In order to move the tool post 10 at high speed along the guide rail 10a, compressed air is supplied between the tool post 10 and the guide rail 10a as needed, and the compressed air is supplied in a direction in which the tool post 10 is lifted. It is preferable to apply power.

However, for example, when performing heavy cutting with a large cutting resistance, it is preferable not to supply the compressed air in order to maximize the positioning and fixing force of the tool rest 10. In this embodiment, an air passage 12 is formed along the longitudinal direction of the groove 11 on a groove 11 and a sliding surface that slides on the guide rail 10 a by the movement of the tool rest 10. Can be distributed.

Next, another embodiment of the present invention will be described. FIG. 4 is a front view of the guide device according to the second embodiment. In this embodiment, the guide member is a single convex guide rail 40 a formed integrally with the support 50.
The guide rail 40a has a guide surface formed in an inclined shape on both side surfaces in order to improve the linear guideability of the tool rest 40. A groove 41 that engages with the guide rail 40a is formed on the tool post 40 side, and has an inclined side wall that makes surface contact with the guide surface. Side wall of groove 41 and guide rail 4
In order to reduce sliding resistance, a low-friction and / or self-lubricating sliding bearing material such as an epoxy-based resin, a polyurethane-based resin, a fluororesin, or a polycarbonate may be interposed between the bearings.

A recess 53 is formed on the upper surface of the guide rail 40a, and the magnet 32 is provided in the recess 53. A recess 43 is formed at the bottom of the groove 41, and the coil 31 is provided in the recess 43. Since the tool post 40 is formed of a metal such as iron, the tool post 40 is attracted by the magnet 32 provided in the recess 53 and pressed against the guide rail 40a. Further, similarly to the previous embodiment, an air flow passage 42 is formed along the longitudinal direction of the guide rail 40a, and compressed air is supplied.

FIG. 5 is a front view of a guide device according to a third embodiment of the present invention. In this embodiment, the support 6
A groove 61 having a semicircular shape is formed in the groove 0, and a cylindrical guide rail 16 a is fitted into the groove 61 so that a protrusion projects from one surface of the support body 60 in a semicircular arc shape. On the other hand, the tool rest 10 is formed in the same manner as in the first embodiment, and has a V-shaped groove 11 that engages with the guide rail 16a. As described above, the semi-cylindrical projection (the guide rail 16
By adopting a guide device based on a combination of a) and a double V-shaped groove (groove 11), excellent linear guideability can be obtained, and the sliding resistance when the tool post 10 moves is significantly reduced. be able to.

The form of supporting the cylindrical guide rail 16a is not limited to the above, as long as a combination of a semi-cylindrical projection and a double V-shaped groove can be formed. For example, instead of the semi-cylindrical groove 61, the guide rail 16a may be supported by a concave or V-shaped groove. Further, the protrusion may be provided on the tool post 10 side,
Further, the protrusion may be integrally formed on one side surface of the tool rest 10 or the support body 60.

FIG. 6 is a front view of a guide device according to a fourth embodiment of the present invention. In the guide device of this embodiment, a resin sliding member 19 is interposed on the sliding surface between the V-shaped groove 11 of the tool rest 10 and the guide rail 10a. Generally, in a guide device having four or more constraining surfaces using a guide having a plurality of V-shaped grooves, the sliding surface between the V-shaped groove and the guide rail is machined and finished with high precision. It is extremely difficult. Therefore, usually, the accuracy of the sliding surface is ensured by the actual matching operation by hand finishing using a scraping operation.

However, such an actual matching operation is
There is a drawback that the work load on the worker is extremely large, a great amount of work time is spent, and the finishing accuracy of the sliding surface varies depending on the skill of the worker. Therefore, in this embodiment, in order to eliminate such a drawback, a portion where the groove 11 and the guide rail 10a slide,
Using the V-shaped groove 11 and the guide rail 10a as a mold, the sliding member 19 is formed by a resin molding method.

That is, a groove 11a for stably fixing the sliding member 19 is formed on the surface of the V-shaped groove 11 where sliding occurs due to the movement of the tool rest 10, and a portion where the groove 11a is formed. Is filled with a resin material mainly composed of an epoxy resin. Then, before the resin material is hardened, the guide rail 10a attached to the support body 20 is fitted into the V-shaped groove 11 as a matrix and pressed against the resin material.
In this manner, the mold is formed, and the resin material is cured to form the sliding member 19 in the groove 11.

Such an operation can be performed easily and quickly, and can be finished to a certain precision regardless of the skill level of the operator. In addition, by using the sliding member 19 formed in this way, it is possible to obtain a guide device with extremely high accuracy of combination of the sliding surface between the V-shaped groove 11 and the guide rail 10a.

In this embodiment, the inventors changed the compressed air to be supplied to the air flow passage 12 with the tool rest 10 placed on a horizontal surface by using the guide device shown in FIG. The surface pressure acting on the sliding surface between the tool and the tool rest 10 and the positioning accuracy (position droop fluctuation) were measured. The measurement conditions are as follows. Magnetic attraction force: 1164N Load on turret: 51N Thrust of linear motor: continuous thrust 156N Maximum thrust 395N Sliding area between guide rail and turret: 42 cm ² Surface pressure on sliding surface: (1164 + 51) / 42 = 290 kPa The measurement results under the conditions are shown in Table 1 below.

[0042]

[Table 1]

From this table, it is possible to reduce the surface pressure of the sliding surface by supplying the compressed air to the air flow passage 12.
It can be seen that the tool rest 10 can be moved smoothly and that the positioning accuracy does not change. However, if the compressed air is raised to 350 kPa or more, the tool post 10 will vibrate during movement. Therefore, in this example, about 300 kPa is optimal. As described above, the pressure of the compressed air to be supplied depends on the size of the tool post 10 and the magnet 32.
It is preferable to perform the above-described measurement in accordance with various conditions such as the adsorption force of the sample, and select an optimum one in accordance with the various conditions.

For example, when the cutting resistance is small, the response speed when moving the tool post 10 is emphasized, and the cutting is performed while the compressed air is always supplied to the air flow passage 12. By doing so, the cutting time can be reduced. On the other hand, in the case of heavy cutting in which the cutting resistance is large, the supply of compressed air to the air flow passage 12 is stopped to maximize the fixing force of the tool rest 10, and to suppress the occurrence of mechanical vibration due to the cutting resistance to perform machining. It is good to do.

Although the preferred embodiments of the present invention have been described, the present invention is not limited to the above embodiments. For example, although the moving body is described as a tool post, the present invention is not limited to the tool post, but can be applied to other moving bodies such as a table, a saddle, a headstock, and a tailstock.

Although the description has been made assuming that the compressed air is supplied to the sliding surface between the groove 11 of the tool rest 10 and the guide rail 10a, the attraction force R of the magnet 32 is reduced when the tool rest 10 is moved. If possible, it may be supplied to another portion between the tool rest 10 and the support 20. Further, the description has been given on the assumption that the magnet 32 is a permanent magnet, but may be an electromagnet. In this case, it is preferable to use a dovetail groove or the like so that the moving body does not fall down so that the moving body does not fall from the guide member at the time of a power failure or the like.

[0047]

According to the present invention, since the moving body is constantly pressed against the guide member by the attraction force of the magnet, a pressing member such as a back plate is not required, and the workpiece can be processed with high precision. Will be possible. Further, since a linear motor for moving the moving body can be configured by the magnet and the coil, the driving body can be reduced in size and size, and the space for the machine tool can be reduced. Furthermore, since the moving body is always urged by the attraction force of the magnet, even if the moving body wears due to long-term use, the rattling due to the wear is suppressed and high-precision machining is maintained for a long time. Can be. Also, when moving the moving body, if the moving body is urged by the compressed air in a direction of lifting the moving body from the guide member, the moving body can be moved at a high speed, and the current supplied to the coil can be reduced. This makes it possible to reduce the temperature rise due to the heat generated by the coil and to perform highly precise positioning of the moving body.

[Brief description of the drawings]

FIG. 1 is a front view of a guide device according to a first embodiment of the present invention.

FIG. 2 is a schematic plan view of a machine tool having a comb-shaped tool rest.

FIG. 3 is a front view of the guide device of FIG. 1 provided with an engaging portion and an engaged portion for preventing the tool post from dropping off;

FIG. 4 is a front view of a guide device according to a second embodiment of the present invention.

FIG. 5 is a front view of a guide device according to a third embodiment of the present invention.

FIG. 6A is a front view of a guide device according to a fourth embodiment of the present invention, and FIG. 6B is an enlarged view of a main part of FIG.

7A is a diagram showing an example of a driving device and a guide device for moving a tool post according to a conventional example of the present invention, FIG.
(B) is a partial enlarged view of (a).

FIG. 8 is a front view of a guide device employing a linear ball guide system according to a conventional example of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Machine tool 2 Bed 3,6 Saddle 4 Headstock 5 Spindle 10,40 Turret (moving body) 10a, 16a, 40a Guide rail (guide member) 11,41 Groove 12 Air flow passage 13 Groove (concave) 15 Joining portion 20, 50, 60 Support 21 Groove 23 Groove (concave) 25 Engaged portion 30 Linear drive portion 31 Coil 32 Magnet P Main component force F Back component force R Attraction force

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Mizue Fukushima 840 Takeno, Shimotomi, Tokorozawa-shi, Saitama Citizen Watch Co., Ltd. (72) Inventor Shuichiro Hosoya 6-1, Honcho, Tanashi-shi, Tokyo 12 Citizen Watch Co., Ltd. Tanashi Factory F-term (reference) 3C048 AA01 BC02 CC01 CC07 DD26 EE06 5H641 BB06 GG03 HH02 HH17 JA06 JA09 JA14

Claims (6)

[Claims] 1. A moving body that moves to process a workpiece, a support that supports the moving body, and is provided between the support and the moving body to guide the movement of the moving body. In a guide device for a moving body in a machine tool having a guide member, a magnet provided on one of the moving body and the support, and a magnet provided on the other of the moving body and the support,
The magnet includes a coil facing the magnet and an object to be attracted which is constantly attracted to the magnet within a moving range of the moving body, wherein the magnet has a rotational moment that emerges from the guide member acting on the moving body. And a suction device for generating a rotational torque in the opposite direction to cancel the rotational torque. 2. The guide member is a guide rail having a V-shaped protrusion, and at least one of the moving body and the support is provided with a V-shaped groove engaging with the guide rail in the same direction. The guide device for a moving body in a machine tool according to claim 1, wherein the guide is formed. 3. The guide member is a guide rail having a semi-cylindrical projection, and at least one of the moving body and the support is provided with a V-shaped groove engaging with the guide rail in the same direction. The guide device for a moving body in a machine tool according to claim 1, wherein the guide is formed. 4. When the moving body moves, the V
The machine tool according to any one of claims 1 to 3, wherein the portion in which the groove and the protrusion slide is formed by a resin molding method using the groove and the protrusion as a mold. Mobile device guidance device. 5. An air flow path is provided between the support and the moving body, and compressed air is circulated through the air flow path when the moving body is moved.
A guide device for a moving body in the machine tool according to any one of the above. 6. The work according to claim 5, wherein when the guide member is a guide rail, the air flow passage is provided on a sliding surface on which the guide rail slides with the groove. A guide device for a moving body in a machine.