JP3551223B2 - Forming method of finned plate - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method for forming a finned plate, and more particularly to a method for forming a finned plate used as a material for a heat sink or a heat transfer tube of a heat exchanger.
[0002]
Finned plate material with fins and grooves provided at predetermined intervals on the surface of the plate material can be used as a heat sink member for ICs (Integrated Circuits), power transistors, etc., or a pipe shape with the finned surface inside or outside. The demand is expanding in various fields, for example, in order to form a heat transfer tube for heat exchange by seam welding.
[0003]
There are various methods for forming fins on the surface of the sheet, such as extrusion and drawing, pressing, cutting, and rolling, but when the thickness of the finned sheet is small, the processing efficiency and fin shape Rolling is common in terms of degrees of freedom.
[0004]
When processing a finned plate material by rolling, a work roll having a groove in a portion where a fin is to be formed is used, and the material is rolled in a portion other than the groove portion of the roll to reduce the plate thickness, and the fin is formed in the groove portion. Is generally used.
[0005]
8 to 11 show an example of a rolled state and a rolled material when a finned plate is formed by a conventional method.
[0006]
FIG. 8 shows a case where a finned plate having fins parallel to the longitudinal direction of the rolled material is formed. In FIG. 8, a work roll 1 forming a finned plate includes a grooved rolling roll 10 including a plurality of flat portions 11 and a plurality of grooves 12 provided between the plurality of flat portions 11, and a grooveless rolling roll. 20. A non-grooved roll 20 is provided at a position facing the grooved roll 10 at a predetermined rolling interval. The cross section of the groove 12 is V-shaped.
[0007]
The material 2 is inserted between the grooved rolling roll 10 and the non-grooved rolling roll 20 of the work roll 1, and the material inserted while rotating the grooved rolling roll 10 and the non-grooved rolling roll 20 in the longitudinal direction of the material 2. By rolling 2, a finned plate having a plurality of fins corresponding to the plurality of groove portions 12 can be formed.
[0008]
FIG. 9 shows the finned plate 3 formed by the method of FIG. The finned plate 3 is composed of a plurality of fins 32 corresponding to the plurality of grooves 12 of the grooved rolling roll 10 and a plurality of thin portions 31 corresponding to the plurality of flat portions 11 of the grooved rolling roll 10. ing. Accordingly, the finned plate 3 as shown in FIG. 9 is formed by the above-described forming method of FIG.
[0009]
FIG. 10 shows a case where a finned plate having fins having a predetermined angle with respect to the longitudinal direction of the rolled material is formed. In FIG. 10, a work roll 5 forming a finned plate includes a grooved rolling roll 15 including a plurality of flat portions 11 and a plurality of grooves 12 provided between the plurality of flat portions 11, and a grooveless rolling roll 15. 20. The grooved rolling roll 15 has a groove 12 formed in a spiral shape such as a screw groove in order to form fins having a predetermined angle with respect to the longitudinal direction of the rolled material. Therefore, the fins having a predetermined angle with respect to the longitudinal direction of the rolled material as shown in FIG. 11 are formed by the grooved roll 15 and the non-groove roll 20 provided in the same manner as in FIG. The plate 4 will be formed.
[0010]
[Problems to be solved by the invention]
However, in the conventional method for forming a finned plate, since the raw material 2 is rolled on the flat portion 11 other than the groove portion 12 forming the fin, the material deformation (elongation) of the thin portion 31 formed on the flat portion 11 is reduced. It occurs in the rolling direction, and the fin portion 32 is pulled in the longitudinal direction by the extension of the thin portion 31. The tensile force causes the fin portion 32 to elongate, and the elongation reduces the thickness of the fin portion 32, making it difficult to form a fin having a sufficient height. Such a phenomenon becomes more remarkable as the width of the thin portion 31 becomes larger than the width of the fin portion 32 in the width direction of the plate material.
[0011]
FIG. 12 is an enlarged cross-sectional view of the groove portion 12 and the fin portion 32 formed by the conventional rolling process. As can be seen from this figure, a gap is created between the fin tip 33 and the apex 12a of the groove 12.
[0012]
Further, as a method of forming the height of the fin portion sufficiently large, there is a method in which a material having a large thickness is used, the pressing force is increased, and the fin portion is rolled at a high pressure to secure the height of the fin portion. In this case, the rolling device becomes large, and the rolling device is costly.
[0013]
Accordingly, an object of the present invention is to provide a method of forming a finned plate having a sufficient fin height easily without increasing the size of a rolling device and without increasing costs.
[0014]
[Means for Solving the Problems]
Since the present invention is to achieve the above object, in the molding method of the finned plate having a plurality of fins which are formed parallel to the longitudinal direction, a plurality of grooves corresponding to the plurality of fins, between said plurality of grooves to the formed, a first rolling roll having a plurality of flat portions parallel to a large number of grooves and the rotation shaft is formed on a surface arranged to form a rolling gap facing the first rolling rolls there in a way that the second rolling rolls are arranged to form a plurality of fins corresponding to the plurality of grooves while suppressing the elongation of the plate by the plurality of grooves by supplying sheet material in the rolling gap in the plate material The plurality of grooves may have a depth and an interval smaller than that of the plurality of grooves .
[0015]
Further, in order to achieve the above object, the present invention provides a method for forming a finned plate having a plurality of fins formed in parallel with a longitudinal direction, wherein a first fin having a plurality of grooves corresponding to the plurality of fins is provided. the rolling rolls disposed, to place the second rolling rolls number of grooves parallel to the rotary shaft is formed on the surface, so as to form a rolling gap facing the first rolling rolls, the rolling gap a plurality of fins corresponding to the plurality of grooves while suppressing the elongation of the plate sheet by supplying by said plurality of grooves to a method of forming the plate material, the number of grooves, depth and spacing A method for forming a finned plate, which is smaller than the plurality of grooves, is provided.
[0016]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIGS. 1 to 4 show an example of a rolled state and a rolled material when a finned plate is formed by the method of the present invention.
[0017]
FIG. 1 shows a case where a finned plate having fins parallel to the longitudinal direction of a rolled material is formed. In FIG. 1, a work roll 6 forming a finned plate is provided between a plurality of flat portions 11 having a plurality of grooves (hereinafter, referred to as fine grooves) 13 on a surface thereof in parallel with a rotation axis, and between the plurality of flat portions 11. A grooved roll 16 composed of a plurality of grooves 12 provided and a non-groove roll 20 are provided. The fine grooves 13 are formed to have a depth and an interval smaller than that of the plurality of groove portions 12, and a non-groove roll 20 is provided at a predetermined rolling interval at a position opposed to the grooved roll 16 having the fine grooves 13. Have been. The cross section of the groove 12 is V-shaped.
[0018]
The raw material 2 is inserted between the grooved rolling roll 16 having the fine grooves 13 and the non-groove rolling roll 20 of the work roll 6, and the grooved rolling roll 16 having the fine grooves 13 and the non-grooving rolling roll 20 The inserted material 2 is rolled while being rotated in the longitudinal direction. Thereby, a plurality of fins corresponding to the plurality of groove portions 12 and a plurality of thin portions which are rolled in the flat portion 12 and have fine grooves 34 formed by the material 2 at the time of rolling entering the many fine grooves 13. 36 can be formed.
[0019]
FIG. 2 shows a finned plate 30 having fine grooves 34 formed by the method of FIG. The finned plate 30 corresponds to a plurality of fins 32 corresponding to the plurality of grooves 12 of the grooved rolling roll 16 and a plurality of flat portions 11 having a large number of fine grooves 13 on the surface of the grooved rolling roll 16. And a plurality of thin portions 36 having fine grooves 34. Therefore, the finned plate 30 having a large number of fine grooves 34 on the surface of the thin portion 36 as shown in FIG. 2 is formed by the above-described forming method of FIG.
[0020]
FIG. 3 shows a case where a finned plate having fins having a predetermined angle with respect to the longitudinal direction of the rolled material is formed. In FIG. 3, a work roll 7 forming a finned plate includes a plurality of flat portions 11 having a plurality of fine grooves 13 on the surface thereof in parallel with the rotation axis, and a plurality of groove portions provided between the plurality of flat portions 11. And a grooved rolling roll 17 having a fine groove 13 composed of a groove 12 and a non-grooved rolling roll 20. The grooved rolling roll 17 having the fine grooves 13 has a groove portion 12 formed in a spiral shape such as a screw groove in order to form a fin having a predetermined angle with respect to the longitudinal direction of the rolled material. I have.
[0021]
Therefore, by a grooved rolling roll 17 having fine grooves 13 provided in the same manner as in FIG. 1 and a non-grooved rolling roll 20, a predetermined rolled material in the longitudinal direction as shown in FIG. A finned plate 35 comprising a plurality of angled fin portions 32 and a plurality of thin portions 36 having a large number of fine grooves 34 on the surface is formed.
[0022]
As described above, by providing a large number of fine grooves 13 on the surfaces of the flat portions 11 of the grooved rolling rolls 16 and 17 in parallel with the rotation axes of the grooved rolling rolls 16 and 17, this fine When the material 2 enters the groove 13, the material deformation (elongation) in the rolling direction is suppressed, and the elongation of the thin portion 36 in the longitudinal direction is restrained. As a result, the fin portion 32 also has no tensile force from the thin portion 36, so that the fin portion 32 does not elongate, and material deformation (bulge) of the groove portion 12 for forming the fin portion 32 increases.
[0023]
As a result, as shown in FIG. 5, the fin portion 32 conforms to the shape of the groove portion 12 of the work rolls 6 and 7, and a sufficient fin height can be obtained.
[0024]
6 and 7 show another embodiment of the present invention. FIG. 6 shows a micro-grooved rolling roll 21 having a large number of micro-grooves 13 parallel to its rotation axis on the surface of a rolling roll having no grooves forming fins, a plurality of flat portions 11, and a plurality of flat portions 11. The workpiece 2 is rolled by a work roll 8 including a grooved rolling roll 10 having a plurality of grooves 12 provided between flat portions 11 to form a finned plate.
[0025]
This makes it possible to obtain a finned plate having a large number of fine grooves 13 on the surface (lower surface) where no fins are formed.
[0026]
FIG. 7 shows a grooved rolling roll 16 composed of a plurality of flat portions 11 having a number of fine grooves 13 on the surface thereof in parallel with the rotation axis, and a plurality of grooves 12 provided between the plurality of flat portions 11. When, it the surface of the opposite rolling rolls having no groove to form the fin portion, the work rolls 9 consisting et Toka fine grooved rolling roll 21 having a number of fine grooves 13 parallel to its axis of rotation, the material 2 Rolling is performed to form a finned plate.
[0027]
This makes it possible to obtain a surface of the groove portion of the surface being formed of a fin, a finned plate having a number of fine grooves 13 and the surface which is not formed in the fin (the lower surface).
[0028]
The finned plate obtained by the work rolls of FIGS. 6 and 7 can also obtain the same effect as the finned plate obtained in FIGS. 1 and 3.
[0029]
【Example】
Hereinafter, a specific example will be described in comparison with the related art.
[0030]
The work roll 1 shown in FIG. 8 is used as an example of the prior art, and the work roll 6 shown in FIG. 1 is used as an example of the present invention. Each groove 12 has a V-shape having a triangular cross section with a base of 0.15 mm and a height of 0.3 mm, and the interval between the grooves 12 (the width of the flat portion 11) is 0.6 mm. The fine groove 13 in FIG. 1 was a groove having a depth of 5 μm, and an annealed material of phosphorus deoxidized copper having a thickness of 0.6 mm and a width of 25 mm was rolled so that the thin portion had a thickness of 0.25 mm. .
[0031]
As a result, the finned plate 3 obtained by rolling with the work roll 1 shown in FIG. 8 has a shape in which the tip 33 of the fin 32 is rounded as shown in FIG. 0.22 mm.
[0032]
On the other hand, in the finned plate 30 obtained by rolling with the work roll 6 in FIG. 1, the fin portion 32 follows the shape of the groove portion 12 as shown in FIG. The maximum was 0.29 mm.
[0033]
【The invention's effect】
As described above, according to the finned plate forming method of the present invention, a large number of fine grooves are formed on one or both of the two rolling rolls constituting the work roll in parallel with the rotation axis thereof. Therefore, at the time of rolling, the material enters into the fine grooves, thereby suppressing the material deformation (elongation) in the rolling direction and restricting the elongation of the thin portion in the longitudinal direction. Since the tensile force of the fin portion is also eliminated, the fin portion does not elongate, and the material deformation (raised) in the groove portion for forming the fin portion increases. As a result, the fin portion of the finned plate follows the shape of the groove of the work roll, and a sufficient fin height can be obtained.
[Brief description of the drawings]
FIG. 1 is a diagram showing that a finned plate having fins parallel to a longitudinal direction of a rolled material is formed according to the present invention.
FIG. 2 is a view showing a finned plate having fine grooves formed by the method of FIG. 1;
FIG. 3 is a diagram showing that a finned plate having fins having a predetermined angle with respect to the longitudinal direction of a rolled material is formed according to the present invention.
FIG. 4 is a view showing a finned plate having fine grooves formed by the method of FIG. 3;
FIG. 5 is an enlarged cross-sectional view of a groove during rolling according to the present invention and a fin formed by the groove.
FIG. 6 is a view showing that a finned plate having fins parallel to a longitudinal direction of a rolled material is formed according to the present invention.
FIG. 7 is a view showing that a finned plate having fins parallel to a longitudinal direction of a rolled material is formed according to the present invention.
FIG. 8 is a view showing that a finned plate having fins parallel to a longitudinal direction of a rolled material is formed by a conventional technique.
FIG. 9 is a diagram showing a finned plate formed by the method of FIG. 8;
FIG. 10 is a view showing that a finned plate having fins having a predetermined angle with respect to the longitudinal direction of a rolled material is formed by a conventional technique.
FIG. 11 is a view showing a finned plate formed by the method of FIG. 10;
FIG. 12 is an enlarged cross-sectional view of a groove portion and a fin portion formed by the conventional rolling process.
[Explanation of symbols]
1, 5, 6, 7, 8, 9 Work roll 2 Material 3, 4, 30, 35 Finned plate 10, 15, 16, 17 Rolling roll with groove 11 Flat portion 12 Groove portion 12a Apex 13, 34 Fine groove 21 Fine Grooved rolls 31, 36 Thin part 32 Fin part 33 Fin tip

Claims (3)

In a method of forming a finned plate having a plurality of fins formed in parallel with the longitudinal direction,
Arrangement and a plurality of grooves corresponding to the plurality of fins are formed between the plurality of grooves, a first rolling roll having a plurality of flat portions parallel to a large number of grooves and the rotation shaft is formed on the surface And
Arranging a second rolling roll so as to form a rolling interval facing the first rolling roll,
A method of forming the plurality of fins corresponding to the plurality of grooves on the plate while suppressing the elongation of the plate by the plurality of grooves by supplying the plate to the rolling interval ,
The method of forming a finned plate, wherein the plurality of grooves have a depth and an interval smaller than the plurality of grooves . The second rolling roll has a number of grooves on the surface thereof similar to the number of grooves parallel to the rotation axis,
2. The method for forming a finned plate according to claim 1, wherein the plurality of fins are formed while suppressing the elongation of the plate material by the plurality of grooves of the second rolling roll. In a method of forming a finned plate having a plurality of fins formed in parallel with the longitudinal direction,
Arranging a first rolling roll having a plurality of grooves corresponding to the plurality of fins,
A second rolling roll having a plurality of grooves formed on its surface in parallel with the rotation axis is disposed so as to form a rolling interval in opposition to the first rolling roll,
A method of forming the plurality of fins corresponding to the plurality of grooves on the plate while suppressing the elongation of the plate by the plurality of grooves by supplying the plate to the rolling interval ,
The method of manufacturing a finned plate, wherein the plurality of grooves have a depth and an interval smaller than the plurality of grooves .

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