JP2000005955A - Control board of machine tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a control board having an inexpensive cooling device. SOLUTION: In a control board 12 storing various kinds of electric equipment 20 controlling a machine tool main body, an inner cooling pipe 21 and an outer cooling pipe 22 are placed in close contact with the inside and outside of the control board case 13 of the control board 12, respectively. Air for use in the machine tool main body is made to branch and pass through the pipes 21, 22. Therefore, the need to provide an expensive cooling device separately is eliminated for cost reduction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control panel of a machine tool, and more particularly to a cooling mechanism inside a control panel of a machine tool.

[0002]

2. Description of the Related Art Various control devices, such as servo amplifiers, serving as heat sources are housed inside a control panel of a machine tool. If the temperature inside the control panel exceeds a predetermined temperature due to heat generated from the various control devices, the temperature may exceed the operating temperature of the various control devices and may not operate normally. For this reason, for example, Japanese Unexamined Utility Model Publication No. Sho 62-65895 and
A cooling device as shown in Japanese Patent Application Laid-Open No. 4-2490 is provided to cool the inside and keep the inside of the control panel at a predetermined temperature or lower. The cooling device includes a heat exchanger and a fan that define a heat exchange chamber.

[0003]

However, the above-mentioned heat exchanger is expensive, and it is necessary to secure an extra space for installing a large heat exchanger. Also,
Since a fan for flowing air is provided between the inside and outside of the heat exchange chamber, the configuration of the cooling device is complicated and easily contaminated, and there has been a problem that the cooling efficiency is reduced when the usage period is long.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a control panel for a machine tool having a cooling mechanism which is inexpensive and whose structure can be simplified. is there.

[0005]

According to a first aspect of the present invention, there is provided a control panel containing various electric devices for controlling a machine tool, wherein a pipe is provided inside and / or outside the control panel. The gist of the invention is to cool the inside of the pipe through a cooling medium supplied from outside.

According to a second aspect of the present invention, in the first aspect, the pipe is provided inside and outside the control panel case, and at least one of them is in contact with the control panel case. This is the gist.

According to a third aspect of the present invention, in the first or second aspect, the pipe is provided inside and outside the control panel case so as to sandwich an outer wall of the control panel case,
The gist is that both the inner and outer pipes are in contact with the outer wall of the control panel case.

According to a fourth aspect of the present invention, in the first aspect of the present invention, the control panel case contacts the control panel case without contacting the control panel case. The gist is that another pipe adjacent to the set pipe is provided.

According to a fifth aspect of the present invention, in the first aspect of the present invention, the pipe is fixed to the control panel case by welding.

According to a sixth aspect of the present invention, in the first aspect of the present invention, the control panel case is formed so as to surround a pipe. I do.

According to a seventh aspect of the invention, in the first aspect of the invention, the gist is that the pipe is formed in a meandering shape. The invention according to claim 8 is the invention according to any one of claims 1 to 7, wherein the air inside the control panel is agitated so as to correspond to the pipe inside the control panel of the machine tool. The main point is that a fan is provided.

According to a ninth aspect of the present invention, in the first aspect of the present invention, the cooling medium is a coolant or air used in a machine tool. And

[0013]

(First Embodiment) A first embodiment of the present invention will be described below with reference to FIGS.

As shown in FIG. 1, various operations of a machine tool 11 having a tool 10 for processing a work (not shown) are controlled by a control panel 12 disposed in the vicinity. As shown in FIG. 2, a box-shaped control panel case 13 is provided with a door 14 that can be opened and closed. The control panel case 13 includes a side wall plate 15 as an outer wall, an upper wall plate 16, a rear wall plate 17, and a bottom wall plate 18. As shown in FIG. 3, a fan 19 for circulating air and various control devices 20 such as a servo amplifier are arranged inside the control panel case 13.

As shown in FIG. 4 and FIG.
1 is tightly fixed to the rear wall plate 17 via a welded portion 23 in a meandering manner, and both ends of the internal pipe 21 project outside the control panel 12. As shown in FIGS. 3 and 5, an external pipe 22 for cooling the control plate case 13 is welded to the outside of the control plate case 13 in close contact with the rear wall plate 17. As shown in FIG. 2, the external pipe 22 is formed in a meandering shape. And the inner and outer pipes 21,
Reference numerals 22 are alternately arranged with the rear wall plate 17 of the control plate case 13 interposed therebetween.

As shown in FIG. 6, the machine tool main body 1 is connected to a compressor 24 for generating compressed air through a pipe 25.
1 are connected to various pneumatic devices 26 that operate the respective units. The compressor 24 on the pipe 25
A branch pipe 27 is connected between the control panel 1 and the various pneumatic devices 26. The other end of the branch pipe 27 is branched into two forks.
2 are connected to the inlets of the two pipes 21 and 22, respectively. In the middle of the branch pipe 27, a filter 30 for collecting oil mist in the compressed air and a pressure reducing valve 28 for adjusting pressure are arranged. The outlets of the pipes 21 and 22 are respectively connected to an exhaust pipe 29, and one end of the exhaust pipe 29 is open to the atmosphere.

The temperature of the air flowing through the pipe 25 is at room temperature near the use of the air because the pipe 25 is exposed to the outside air. The heat generated inside the control panel 12 is transmitted to the air flowing into the internal pipe 21 via the pipe wall of the internal pipe 21 shown in FIG. Therefore, the air inside the control panel 12 is deprived of heat and cooled. In this case, the internal air is stirred by the fan 19, and cooling is promoted. Then, the air holding the heat inside the internal pipe 21 is discharged to the atmosphere through the exhaust pipe 29. A part of the heat of the air in the internal pipe 21 is transmitted to the rear wall plate 17 via the internal pipe 21.

On the other hand, the heat in the control panel 12 heats the control panel case 13. And this heat is in the external pipe 2
The air that has flowed into the second pipe 2 is transmitted through the pipe wall of the external pipe 22. For this reason, the heat accumulated in the control panel case 13 itself is taken by the air flowing through the external pipe 22 and cooled, and at the same time, the external pipe 22 and the control panel case 13 are cooled by contacting the outside air. As a result, the inside of the control panel case 13 is cooled. Then, the air holding the heat in the external pipe 22 is exhausted to the atmosphere through the exhaust pipe 29.

As described above, the internal temperature of the control panel 12 approaches the normal temperature. Therefore, according to the first embodiment, the following effects can be obtained. The inner pipe 21 and the outer pipe 22 were tightly fixed inside and outside the control panel case 13 of the control panel 12, and air was passed through both pipes 21 and 22. Then, the heat generated in the control panel 12 is transmitted to the air, so that the heat of the control panel 12 is radiated. For this reason, unlike before,
No need for expensive heat exchangers with heat exchangers,
There is no need to secure an extra installation space for installing the heat exchanger inside or outside the control panel 12. Therefore, the control panel 1
2 can be inexpensive and the control panel 12 can be downsized.

Since the cooling air is also used as the air used in the machine tool main body 11, a dedicated compressor or the like for generating the cooling air is not required, and the equipment cost can be reduced.

Since the fan 19 is disposed inside the control panel case 13 to stir the air inside, the heat radiation efficiency of the control panel 12 can be improved. The air flowing into both pipes 21 and 22 is filtered by filter 30
, The oil mist is removed. For this reason, the inside of both pipes 21 and 22 is not contaminated with oil.

(Second Embodiment) Next, a second embodiment of the present invention will be described with reference to FIG. The main difference between the second embodiment and the first embodiment is that instead of using air as a cooling medium for the control panel 12, a coolant for a machine tool is used. Therefore, the same components as those in the first embodiment are denoted by the same reference numerals, and duplicate descriptions are omitted.

As shown in FIG. 8, the pump 40 is a tank 4 for storing the coolant used in the machine tool main body 11.
1 and to a tool part 43 of the machine tool main body 11 via a pipe 42. One end of the collection pipe 44 is opened in the tool part 43, and the collection pipe 4 is opened.
The other end of 4 is connected to tank 41.

The pump 40 on the pipe 42
And a branch pipe 45 between the machine tool body 11 and the tool portion 43.
The other end of the branch pipe 45 is bifurcated and connected to the inlets of both pipes 21 and 22 of the control panel 12, respectively. A pressure adjusting valve 46 for adjusting pressure is provided on the branch pipe 45. And the control panel 12
The outlets of the internal pipe 21 and the external pipe 22 are connected to one end of a discharge pipe 47, respectively, and the other end of the discharge pipe 47 is connected to the middle of the recovery pipe 44.

The coolant stored in the tank 41 is sucked up by a pump 40 and supplied to a tool portion 43 of the machine tool body 11 through a pipe 42. The cooling liquid cools the tool part 43, and is thereafter collected in the tank 41 via the collection pipe 44.

The coolant sucked by the pump 40 branches into the branch pipe 45 through the pipe 42 and is adjusted in pressure by passing through the pressure adjusting valve 46. Then, the cooling liquid as the cooling medium flows into the two pipes 21 and 22 and the control panel 1 as in the case described above.
The inside of the tank 2 is cooled and returns to the tank 41.

Therefore, according to the second embodiment, in addition to the same effects as those of the above-described first embodiment, the cooling capacity can be further improved because the cooling liquid is used as the cooling medium.

The above embodiments may be modified as follows. In the above embodiments, the internal pipe 21 is provided in close contact with the wall of the control panel case 13, but as shown in FIG. Then, a large number of fins 50 are provided around the inner pipe 21. Even in this case, the same effects as those of the above embodiments can be obtained.

As shown in FIG. 10, the rear wall plate 17 is formed so as to be distorted in accordance with the outer shape of the external pipe 22, and the external pipe 22 is tightly surrounded there. By doing so, the contact area between the external pipe 22 and the rear wall plate 17 increases, and the heat accumulated in the control panel case 13 is transmitted to the external pipe 22 more efficiently. Therefore, the cooling efficiency of the control panel case 13 can be further improved.

In each of the above embodiments, both pipes 2
11 and 22 are arranged in the vertical direction on the paper, but as shown in FIG. 11, they must be arranged in the horizontal direction on the paper. Even in this case, the same effects as those of the above embodiments can be obtained.

In each of the above embodiments, both pipes 2
Although the reference numerals 1 and 22 are arranged alternately via the rear wall plate 17 of the control panel case 13, they must be disposed at positions facing each other via the control panel case 13 as shown in FIG. Even in this case, the same effects as those of the above embodiments can be obtained.

In each of the above embodiments, the external pipe 22 is disposed and fixed in close contact with the outer wall of the control panel case 13, and the internal pipe 21 is disposed in close contact with the inner wall of the control panel case 13. As shown in FIG. 13, one pipe 22 is disposed in close contact with the inner wall of the control panel case 13, and the other pipe 21 is slightly separated from the inner wall of the control panel case 13, and a number of fans 50 To be installed. Even in this case, the same effects as those of the above embodiments can be obtained.

Control panel case 13 for internal and external pipes
In the same manner as in the above-described embodiments. Even in this case, the same effects as those of the above embodiments can be obtained.

As shown by a two-dot chain line in FIG. 13, an external pipe 22 is also provided on the outer surface of the rear wall plate 17. Even in this case, the same effects as those of the above embodiments can be obtained.

[0035]

According to the first aspect of the invention, since the cooling mechanism is configured to be cooled by the cooling medium supplied from the outside, the existing mechanism of the machine tool can be used, and an inexpensive control panel is provided. be able to.

According to the invention described in claim 2, according to claim 1
In addition to the effects of the invention described in (1), since the pipe is in contact with the control panel case, the cooling efficiency can be improved.
According to the invention described in claim 3, claim 1 or claim 2
In addition to the effects of the invention described in (1), since both pipes are in contact with the control panel case, the cooling efficiency can be further improved.

According to the invention set forth in claim 4, according to claim 1,
To the effect of the invention according to any one of claims 3 to 3,
By providing another pipe, the cooling efficiency can be further improved.

According to the invention described in claim 5, according to claim 1,
In addition to the effects of the invention according to any one of claims 4 to 4,
Since the pipe is welded to the control panel case, the pipe can be securely fixed.

According to the invention described in claim 6, according to claim 1,
In addition to the effects of the invention according to any one of claims 5 to 5,
By increasing the contact area between the pipe and the control panel case, the cooling efficiency can be improved.

According to the invention of claim 7, according to claim 1,
To the effects of the invention according to any one of claims 6 to 6,
Since the pipe is formed in a meandering shape, the contact area with the pipe is further increased, and the cooling efficiency can be improved.

According to the invention described in claim 8, according to claim 1,
To the effect of the invention according to any one of claims 7 to 7,
Since the fan for stirring the air inside the control panel is provided, the amount of air contact with the pipe increases, and the cooling efficiency can be improved.

According to the ninth aspect of the present invention, the first aspect is provided.
In addition to the effects of the invention according to any one of claims 8 to 8,
With the configuration in which cooling is performed by air or a cooling liquid, an existing mechanism of the machine tool can be used, equipment costs can be reduced, and energy can be saved.

[Brief description of the drawings]

FIG. 1 is a layout diagram of a control panel according to a first embodiment.

FIG. 2 is a perspective view of a control panel according to the first embodiment.

FIG. 3 is a partial cross-sectional view of a control panel according to the first embodiment.

FIG. 4 is a front sectional view of the control panel according to the first embodiment.

FIG. 5 is an enlarged sectional view of a main part of the control panel in the first embodiment.

FIG. 6 is a schematic piping diagram of a control panel in the first embodiment.

FIG. 7 is a side sectional view of a control panel according to the first embodiment.

FIG. 8 is a schematic piping diagram of a control panel according to a second embodiment.

FIG. 9 is a sectional view of a control panel according to another embodiment.

FIG. 10 is an enlarged sectional view of a main part of a control panel according to another embodiment.

FIG. 11 is a sectional view of a control panel according to another embodiment.

FIG. 12 is a cross-sectional view of a control panel according to another embodiment.

FIG. 13 is a sectional view of a control panel according to another embodiment.

[Explanation of symbols]

11: machine tool main body, 12: control panel, 13: control panel case, 15: side wall plate, 16: upper wall plate, 17: rear wall plate, 18
... bottom wall plate, 19 ... fan, 20 ... various control devices, 21 ...
Inner pipe, 22 ... Outer pipe, 23 ... Welded part.

Claims (9)

[Claims] 1. A control panel containing various electric devices for controlling a machine tool, wherein a pipe is provided in at least one of the inside and the outside of the control panel, and the inside of the pipe is passed through a cooling medium supplied from outside. Control panel of machine tool to be cooled. 2. The control panel of a machine tool according to claim 1, wherein the pipe is provided inside and outside a control panel case, and at least one of them is in contact with the control panel case. 3. The control panel case according to claim 1, wherein the pipes are provided inside and outside the control panel case so as to sandwich the outer wall of the control panel case, and both the inner and outer pipes are in contact with the outer wall of the control panel case. The control panel of the machine tool described. 4. The control panel case according to claim 1, wherein another pipe is provided in proximity to the pipe contacted with the control panel case without contacting the control panel case. The control panel of the machine tool described. 5. The control panel of a machine tool according to claim 1, wherein the pipe is fixed to a control panel case by welding. 6. The control panel of a machine tool according to claim 1, wherein the control panel case is formed so as to surround a pipe. 7. The control panel of a machine tool according to claim 1, wherein the pipe is formed in a meandering shape. 8. The control panel of a machine tool according to claim 1, wherein a fan is provided so as to correspond to a pipe disposed inside the control panel of the machine tool. . 9. The machine tool control panel according to claim 1, wherein the cooling medium is a coolant or air used in a machine tool.