JP3641422B2 - Manufacturing method of cooling plate - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method of manufacturing a cooling plate used for cooling, for example, a linear motor coil, and more specifically, a metal pipe as a coolant flow path is disposed between the inner surfaces of a pair of opposing metal plates. The present invention relates to a manufacturing method of a cooling plate.
[0002]
[Prior art]
In recent years, linear motor technology has been adopted in various fields, and one of them is the linear table for workpiece feed of machine tools. When the linear motor is operated, heat is generated in the coil. To cool.
[0003]
The cooling method is roughly divided into a method in which cooling pipes are arranged in a zigzag shape between linear motor coils, the coil and the cooling pipe are molded with a resin having good thermal conductivity, and a cooling plate having a coolant passage is linearly provided. Although there is a method of attaching to a motor coil, since the former method requires a manufacturing cost, a cooling plate is generally used.
[0004]
[Problems to be solved by the invention]
Normally, the cooling plate is formed with a hole in a single metal plate to form a cooling circuit. In a general machine tool, the depth of the hole is about 20 times the diameter. For example, a hole with a diameter of 6 mm is limited to about 120 mm, and further processing is difficult.
[0005]
In the case of a linear table, the length required for the cooling plate may be about 500 mm or more, and therefore, a single perforated cooling plate cannot be used. In such a case, it is sufficient to use a plurality of cooling plates, but it is not a preferable solution because piping connection between the cooling plates is necessary.
[0006]
As another method, it is conceivable that two metal plates are formed, and a pipe housing groove is formed on each inner surface, and the cooling pipe is sandwiched between the metal plates. However, this method has a problem in that the desired cooling capacity cannot be obtained because the cooling pipe cannot be brought into close contact with the metal plate.
[0007]
The present invention has been made to solve such problems, and an object of the present invention is to provide a method of manufacturing a cooling plate that is technically not particularly limited in length and has a high cooling capacity. It is in.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a cooling plate manufacturing method in which a metal pipe as a coolant flow path is disposed between the inner surfaces of a pair of metal plates that are combined to face each other. A pipe storage groove having a substantially larger diameter than that of the metal pipe in a combined state and having a reverse taper shape with respect to the mating surface of the metal plate is provided along the piping path of the metal pipe. Forming and storing the metal pipe in the pipe storage groove and integrally combining the pair of metal plates with a predetermined fixing means, and then supplying a pressurized fluid into the metal pipe, The pipe diameter is increased and the pipe is closely attached to the pipe housing groove.
[0009]
According to this structure, since it is not necessary to perforate the metal plate, the length of the cooling plate can be made as required. Further, since the metal pipe is expanded in diameter and is closely attached in the pipe housing groove, there is little cooling loss and a high cooling capacity is exhibited.
[0010]
In addition, since the pipe housing groove has an inverse taper shape, the expanded metal pipe can participate in the fixing means for the two metal plates.
[0011]
In addition, when the amount of heat generated from the object to be cooled that is cooled by the cooling plate is partially different, the groove shape of the pipe storage groove corresponding to the portion where the amount of generated heat is large is partially formed, A more effective cooling can be performed by partially enlarging the diameter of the metal pipe accordingly. This is also one of the features of the present invention.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
First, a first embodiment of the present invention will be described with reference to FIGS. 1 is a plan view, FIG. 2 is a side view, and FIG. 3 is a cross-sectional view taken along line AA of FIG.
[0013]
The cooling plate 1 includes a pair of metal plates 10 and 20 that form a flat plate shape that is opposed to each other. The material is preferably a metal with high thermal conductivity. In this embodiment, the metal plates 10 and 20 have the same thickness, but one may be thin and the other may be thick.
[0014]
Pipe storage grooves 11 and 21 are formed along the piping path of the metal pipe (cooling pipe) 30 on the inner surfaces of the metal plates 10 and 20. Each of the pipe storage grooves 11 and 21 is a hemispherical trough groove. In this case, the inner diameters of the pipe storage grooves 11 and 21 are slightly larger than the outer diameter of the metal pipe 30. For the metal pipe 30, for example, an aluminum tube or a copper tube having good formability is used.
[0015]
To manufacture the cooling plate 1, the metal pipe 30 is stored in the pipe storage grooves 11 and 21, and the metal plates 10 and 20 are fixed with bolts or the like. Then, both ends of the metal pipe 30 are connected to a pressurizing means (not shown), and a predetermined fluid pressure is applied to the metal pipe 30 to expand the diameter of the metal pipe 30 so that the metal pipe 30 is brought into close contact with the pipe housing grooves 11 and 21. According to this, the heat conduction efficiency becomes extremely high due to the adhesion between the metals.
[0016]
In the first embodiment, the pipe housing grooves 11 and 21 are formed on the inner surfaces of the metal plates 10 and 20, respectively. The second embodiment shown in the side view of FIG. 4 and the cross-sectional view of FIG. As in the embodiment, a pipe housing groove 21 slightly larger than the outer diameter of the metal pipe 30 may be formed only on the inner surface side of one metal plate 20. In the second embodiment, the other metal plate 10 acts as a lid member that closes the pipe housing groove 21.
[0017]
Next, a third embodiment of the present invention will be described with reference to the cross-sectional view of FIG. 6 and the enlarged cross-sectional view of the main part of FIG. In the third embodiment, as in the first embodiment, the pipe storage grooves 11 and 21 are formed on the inner surfaces of the metal plates 10 and 20, but in this case, the pipe storage grooves 11 and 21 It is formed in a reverse taper shape with respect to the mating surfaces of the plates 10 and 20.
[0018]
That is, assuming that the opening width of the pipe storage grooves 11 and 21 is B, and the groove width of the portion that enters the inside of the metal plates 10 and 20 from the opening is C, the pipe storage grooves 11 and 21 satisfy B <C. It is formed.
[0019]
Therefore, the metal plates 10 and 20 can be held in a fixed state by expanding the diameter of the metal pipe 30 along the groove shape. In order to make this fixing more effective, it is preferable that the distance D between the groove bottoms of the pipe housing grooves 11 and 21 is substantially equal to the outer diameter of the metal pipe 30.
[0020]
Further, when the amount of heat generated from the object to be cooled that is cooled by the cooling plate 1 is partially different, as shown in the fourth embodiment of FIG. 8, it corresponds to a portion where the amount of generated heat is large. The groove shape of the pipe housing groove at the location can be partially enlarged, and the diameter of the portion 31 of the metal pipe 30 can be greatly expanded accordingly.
[0021]
As mentioned above, although several embodiment of this invention was described, this invention is not limited to this. The material of the metal plate and the metal pipe can be arbitrarily selected. Further, the pressurized fluid for expanding the diameter of the metal pipe may be a gas as well as a liquid. Moreover, although the cooling plate of this invention is suitable for cooling of a linear motor coil, the use is not limited to this.
[0022]
【The invention's effect】
As described above, according to the present invention, in manufacturing the cooling plate between the inner surfaces of the pair of metal plates to be combined oppositely formed by arranging the metal pipe (cooling pipe), each of the inner surface side of the metal plate In addition, a pipe storage groove having a diameter substantially larger than that of the metal pipe in the combined state and having a reverse taper shape with respect to the mating surface of the metal plate is formed along the pipe path of the metal pipe . In this case, a pressurized fluid is supplied into the metal pipe, and the pipe diameter is expanded so as to be in close contact with the pipe housing groove. A cooling plate that can be exhibited can be manufactured.
[Brief description of the drawings]
FIG. 1 is a plan view showing a first embodiment of a cooling plate manufactured according to the present invention.
FIG. 2 is a side view of the first embodiment.
FIG. 3 is an enlarged cross-sectional view taken along line AA in FIG.
FIG. 4 is a side view showing a second embodiment of the present invention.
FIG. 5 is an enlarged cross-sectional view of the second embodiment.
FIG. 6 is a sectional view showing a third embodiment of the present invention.
FIG. 7 is an enlarged cross-sectional view of a main part of the third embodiment.
FIG. 8 is a plan view showing a fourth embodiment of the present invention.
[Explanation of symbols]
1 Cooling plates 10 and 20 Metal plates 11 and 21 Pipe storage groove 30 Metal pipe (cooling pipe)

Claims (2)

In the manufacturing method of a cooling plate formed by arranging a metal pipe as a coolant flow path between the inner surfaces of a pair of metal plates that are opposed to each other,
Each of the inner surfaces of the pair of metal plates has a pipe storage groove that is substantially larger in diameter than the metal pipe in a combined state and has a reverse taper shape with respect to the mating surface of the metal plate. Formed along the piping path, the metal pipe is accommodated in the pipe accommodation groove, the pair of metal plates are integrally combined by a predetermined fixing means, and then a pressurized fluid is introduced into the metal pipe. A method for manufacturing a cooling plate, characterized in that the pipe diameter is expanded by being supplied, and the pipe diameter is brought into close contact with the groove.   When forming the pipe housing groove on the inner surface side of the metal plate, if the amount of heat generated from the object to be cooled that is cooled by the cooling plate is partially different, the pipe is stored at a location corresponding to the portion where the generated heat amount is large. 2. The method of manufacturing a cooling plate according to claim 1, wherein the groove shape of the groove is partially formed large, and the diameter of the metal pipe is partially expanded correspondingly.

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