JP4301593B2 - Straightening device for extruded shape of heat sink - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an extruded shape when a plate fin type heat sink having a base plate and a number of plate fins integral with the base plate and perpendicular to the base plate and parallel to each other is manufactured using the extruded shape. it relates to the equipment to correct the wood.
[0002]
[Prior art]
As shown in FIG. 10, the plate fin heat sink includes a base plate 1 and a large number of plate fins 2 that are integral with the base plate 1 and are perpendicular to the base plate 1 and parallel to each other.
By the way, in order to mass-produce the heat sink 10 having the above configuration, a method using an extruded profile has been performed. In this method, as shown in FIG. 11, the bearing 4 of the extrusion molding die 3 is formed into the shape of the heat sink 10 having the above-described configuration, and a metal material is passed through the bearing 4.
[0003]
[Problems to be solved by the invention]
However, in the method using the die 3 of FIG. 11, when the fin height H is 45 mm, only a fin pitch P of about 8 to 12 mm can be obtained. A P of about 6 to 7 mm could not be obtained. This is because in order to reduce the fin pitch P, the pitch P between the tips of the portions 4a forming the plate fins 2 of the bearing 4 must be reduced. It is because the intensity | strength of A is too small and the die | dye 3 will be damaged.
Therefore, in the conventional method using the die 3 of FIG. 11, a plate fin type heat sink having a high fin height H and a small fin pitch P cannot be obtained.
[0004]
Therefore, the present inventors use a die 3 as shown in FIG. 1 to produce an extruded shape member 51 having a base plate as shown in FIG. 2 having an arc shape, and correct the base plate 1 to be flat. A method for obtaining a plate fin type heat sink having a high height H and a small fin pitch P was considered.
[0005]
The present invention, in the method, and to provide a equipment capable of correcting the base plate 1 of the extruded shape member 51 efficiently and reliably flat.
[0006]
[Means for Solving the Problems]
According to the first aspect of the present invention, there is provided a heat sink for correcting an extruded profile having a shape in which the base plate has an arc shape and a large number of plate fins radially extend on the convex side thereof so that the base plate becomes flat. A device for correcting an extruded profile, wherein the extruded profile is placed with the convex surface facing upward, and the above-mentioned profile on the placement table in order to flatten the base plate of the extruded profile. A pressing portion that presses the extruded shape member downward, and the mounting table has a pair of pedestals that respectively support both end edges of the extruded shape member, and the pair of pedestals is formed by the extruded shape member. As the sheet is pressed, the two ends of the extruded shape member are supported so as to move away from each other.
[0007]
According to a second aspect of the present invention, in the first aspect of the present invention, the pressing surface of the pressing portion is convex downward, and the convex shape causes a spring back to occur in the pressed base plate of the extruded shape member. The base plate of the extruded shape member is set to have a downward convex shape.
[0008]
[0009]
[0010]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 3 is a longitudinal sectional view of the plate fin type heat sink 11 which cannot be obtained by the conventional method using an extruded profile, that is, the fin height H is high and the fin pitch P is small. Specifically, for example, the fin height H is 45 mm, and the fin pitch P1 is 6 mm. In FIG. 3, the same reference numerals as those in FIG. 10 denote the same or corresponding parts.
[0011]
The heat sink 11 having the above-described configuration is manufactured as follows.
First, an extruded profile 51 having the shape shown in FIG. 2 is produced.
The extruded shape member 51 has a shape in which the base plate 1 has an arc shape and a large number of plate fins 2 extend radially on the convex surface side. This extruded shape member 51 is produced using the extrusion die 3 shown in FIG. The bearing 41 formed on the die 3 has the same shape as the longitudinal section of the extruded shape member 51. The bearing 41 has such a width that the portion A between the tips of the portions 41a forming the plate fin 2 is strong enough not to be damaged by the pushing load, and the target fin pitch between the base ends of the portions 41a. It is set to have the same width as P1. By passing a metal material through the bearing 41, an extruded profile 51 shown in FIG. 2 is obtained.
[0012]
Next, the arc-shaped base plate 1 of the extruded profile 51 is straightened by the straightening device 6.
As shown in FIG. 4, the correction device 6 presses the mounting shape 61 on which the extruded shape member 51 is placed with the convex surface facing upward, and the extruded shape material 51 on the placement table 61 downward. And a pressing portion 62. The mounting table 61 has a pair of pedestals 611 and 612 that respectively support both end edges of the extruded shape member 51. The pair of pedestals 611 and 612 are slidably fitted to the horizontal rod 613 via bearings (not shown). Stoppers 614 and 615 are fixed to the substrate 616 at both ends of the horizontal rod 613. Between the base 611 and the stopper 614 and between the base 612 and the stopper 615, springs 617 and 618 fitted to the horizontal rod 613 are provided, respectively. As shown in FIG. 5, a notch portion 7 with which an edge of the extruded shape member 51 abuts is formed at an inner corner of the upper portion of the base 611. The notch portion 7 includes a first taper portion 71, a right angle portion 72, and a second taper portion 73. Similarly, the notch 7 is formed in the base 612. The pressing portion 62 is configured by joining a plate-like pressing member 623 to the lower surface of a movable plate 622 that can move up and down along a vertical rod 621 fixed to a substrate 616. The lower surface of the pressing member 623, that is, the pressing surface 624 is slightly convex downward. The movable plate 622 is normally driven by hydraulic pressure, but may be performed by air pressure, water pressure, or a power press. The pressing member 623 is usually made of bakelite.
[0013]
In the correction device 6 having the above configuration, first, as shown in FIG. 4, both end edges of the extruded shape member 51 are brought into contact with the notch portions 7 of the pair of pedestals 611 and 612 facing each other at a predetermined interval. Let As shown in FIG. 6, the end edge of the extruded shape member 51 is brought into contact with the first tapered portion 71. Accordingly, the extruded shape member 51 is supported by the pedestals 611 and 612, that is, placed on the placing table 61.
[0014]
Next, as shown in FIG. 7, the movable plate 622 is driven and lowered, the pressing surface 624 of the pressing member 623 is brought into contact with the tip of the plate fin 2 of the extruded shape member 51, and the pressing member 623 performs the extrusion. The material 51 is pressed downward. At this time, the pedestals 611 and 612 are separated from each other while resisting the repulsive force of the springs 617 and 618 while supporting both end edges of the extruded shape member 51. As the extruded shape member 51 is pressed, the radius of curvature of the base plate 1 increases, and the base plate 1 becomes flat as shown in FIG. At this time, both end edges of the extruded shape member 51 come into contact with the right-angled portion 72 of the notch portion 7 of the bases 611 and 612.
[0015]
Then, the pressing is further continued, and the tips of all the plate fins 2 of the extruded shape member 51 are brought into contact with the pressing surface 624. As a result, the base plate 1 of the extruded shape member 51 is slightly convex downward as shown in FIG. This convex shape is the same as the convex shape of the pressing surface 624, and the convex shape of the pressing surface 624 causes the base plate 1 of the extruded shape member 51 to be moved by the amount of spring back that occurs in the pressed base plate 1 of the extruded shape member 51. It is set to be convex downward. Then, the movable plate 622 is raised and the extruded shape member 51 is removed. Thereby, the flat extruded shape 51 shown in FIG. 3, ie, the plate fin type heat sink 11, is obtained.
[0016]
As described above, the above-described method is used to support the extruded shape member 51 at both end edges in a state where the convex surface faces upward, and to correct the base plate 1 of the extruded shape member 51 flatly. A pressing step of pressing the extruded shape member 51 downward from the upper side while moving the extruded shape member 51 away from each other while supporting both end edges thereof. The base plate 1 is pressed so as to have a downwardly convex shape as much as the spring back occurs.
[0017]
When the extruded shape member 51 shown in FIG. 2 is manufactured using the die 3 shown in FIG. 1, the bearing 41 formed on the die 3 is damaged by the portion A between the tips of the portions 41a against the pushing load. Since the die 3 is set so as to have a width that does not have any strength, the die 3 is not damaged by the extrusion load, and the extruded shape member 51 of FIG.
[0018]
According to the correction device 6 having the above-described configuration, the extruded shape member 51 is corrected by simply placing the extruded shape member 51 on the mounting table 61 and driving the movable plate 622. Therefore, workability is extremely good. .
[0019]
Further, since the pressing surface 624 is slightly convex downward, the base plate 2 of the extruded shape member 51 becomes slightly convex downward as shown in FIG. 9, so that the base plate 2 is flattened by the spring back. . Therefore, according to the correction device 6 having the above-described configuration, the base plate 2 of the extruded shape member 51 can be corrected to be flat in consideration of the spring back.
[0020]
【The invention's effect】
According to the invention of claim 1 Symbol mounting, base plate shape multiple plate fins in an arc shape at and and its convex side extends radially, the extruded profile, and mounted on the mounting table, out pressing The base plate of the extruded shape can be straightened simply by pressing the shape with the pressing portion. Therefore, the correction work can be performed easily and efficiently.
[0021]
According to the invention of claim 2 Symbol placement, since the base plate of the extruded profile can be slightly convex downward, it flat base plate in consideration of the spring back.
[Brief description of the drawings]
FIG. 1 is a front view showing an extrusion die used for producing an extruded profile to be corrected by a correction apparatus of the present invention.
FIG. 2 is a front view showing an extruded profile to be corrected by the correction apparatus of the present invention.
FIG. 3 is a front view showing a plate fin type heat sink obtained by straightening with the straightening device of the present invention.
FIG. 4 is a front view showing one step of work using the correction apparatus of the present invention.
FIG. 5 is an enlarged front view showing the pedestal of the mounting table of the correction apparatus of the present invention.
6 is an enlarged front view showing an end edge portion of the extruded profile shown in FIG. 4; FIG.
7 is a front view showing a step that follows the step in FIG. 4. FIG.
8 is a front view showing a step that follows the step in FIG. 7. FIG.
9 is a front view showing a step that follows FIG. 8. FIG.
FIG. 10 is a perspective view showing a plate fin type heat sink obtained by a conventional method using an extruded profile.
FIG. 11 is a front view showing an extrusion molding die used in a conventional method using an extruded profile.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Base plate 2 Plate fin 51 Extrusion profile 6 Straightening device 61 Mounting base 611,612 Base 62 Press part 624 Press surface

Claims (2)

This is a heat sink extrusion profile correction device that corrects an extruded profile in which the base plate has an arc shape and a large number of plate fins extend radially on the convex surface side so that the base plate becomes flat. And
A mounting table on which the extruded profile is mounted with the convex surface facing upward;
To flat correct base plate of the extruded profile, and a pressing portion for pressing the extruded material on the table below,
The mounting table has a pair of pedestals that respectively support both end edges of the extruded shape member, and the pair of pedestals correspond to both end edges of the extruded shape member as the extruded shape member is pressed. An apparatus for correcting an extruded profile for a heat sink, wherein the straightener is moved away from each other while being supported.   The pressing surface of the pressing portion has a downward convex shape, and the convex shape makes the extruded shape base plate convex downward by the amount that springback occurs in the pressed extruded shape base plate. The straightening device for an extruded shape for a heat sink according to claim 1, which is set as described above.

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