JP6758647B2 - Heat dissipation fin forming device - Google Patents

Description

The present invention relates to a heat radiating fin forming device for forming a plate-shaped heat radiating fin of a radiator for efficiently radiating heat generated from, for example, an electronic component or the like by a tool.

For example, in order to dissipate heat generated from an electronic component such as a semiconductor integrated circuit, a radiator generally used in practice conventionally has a large number of comb-shaped heat radiating fins vertically erected on a base. By directly or indirectly joining the radiator to an electronic component or the like, heat is dissipated to the outside through the heat radiation fins of the radiator. This radiator is usually manufactured by extruding or casting a metal material having good thermal conductivity, which is made of aluminum.

Further, a method for manufacturing a radiator for forming radiation fins using a digging tool is disclosed in Japanese Patent Application Laid-Open No. 2001-156224 (Patent Document 1) and Japanese Patent Application Laid-Open No. 2005-142247 (Patent Document 2). The method for manufacturing a radiator shown in Patent Document 1 uses a heat sink material made of an aluminum alloy extruded profile having a projecting work portion formed on the upper surface side of a substrate portion for forming fins, and the fins are formed. The work piece is dug up using a cutting tool such as a cutting tool, whereby a plurality of fins are formed.

The method for manufacturing a radiator shown in Patent Document 2 is a state in which a hoop-shaped metal plate having good thermal conductivity and a digging tool having a blade formed on the tip side in the moving direction are held at a predetermined angle. By digging down the hoop-shaped metal plate by moving relative to each other, the plate-shaped heat-dissipating fins are integrally formed upright, and then the heat-dissipating fins are vertically formed from the upstream side of the formation pitch by the forming pitch. By moving the hoop-shaped metal plate and the digging tool relative to each other and digging up the hoop-shaped metal plate, the next plate-shaped heat radiation fin is integrally formed upright, and thereafter, by repeating this digging process in sequence, the hoop-shaped metal plate is formed. A plurality of heat radiation fins are continuously formed on the surface.

Japanese Unexamined Patent Publication No. 2001-156224 Japanese Unexamined Patent Publication No. 2005-142247

As shown in Patent Documents 1 and 2 described above, when the heat radiation fins are formed by using the digging tool, the heat radiation fins 101 curl and stand up from the metal plate 100 as shown in FIG. The plate thickness on the base end side of the is thicker, and the plate is gradually formed thinner toward the tip. Therefore, the space G1 on the base end side of the adjacent heat radiation fins 101 is narrow, and the space G2 on the tip side is wide. When the heat radiating fin 101 of this form is used as a heat radiator, for example, when the heat 103 generated from the heat source 102 of an electronic component or the like is radiated, the heat 103 is generated between the heat radiating fins 101 via the metal plate 100 as shown by the dotted line. And heat is radiated through the heat radiating fin 101. Since heat has the property of rising in the vertical direction, when heat is radiated from between the heat radiating fins 101, if the heat radiating fins 101 are curling, the heat 103 indicated by the dotted line meanders while hitting the side surface of the heat radiating fins 101. To rise. Therefore, the heat radiating fin 101 may be reheated, which is a factor of lowering the heat radiating efficiency.

In order to quickly raise the heat 103 radiated through the metal plate 100, it is desirable to vertically erect and form the heat radiating fins. Therefore, the metal material is manufactured by extruding or casting. There is. However, in the extrusion process or the casting process, since the thickness and spacing of the heat radiating fins cannot be reduced, the heat radiating area is reduced, so that the heat radiating efficiency cannot be improved, and there is a problem that the size is inevitably increased. On the other hand, in the method of forming heat dissipation fins using a digging tool, it is possible to increase the heat dissipation area and improve the heat dissipation efficiency by reducing the thickness and spacing of the heat dissipation fins, but the heat dissipation fins are erected vertically. There was no way to form it.

Therefore, an object of the present invention is to provide a heat radiation fin forming device capable of forming heat radiation fins of a radiator which is vertically formed by using a digging tool substantially perpendicular to a flat surface of a metal plate.

In order to solve the above problems, the heat radiation fin forming apparatus according to the invention of claim 1 holds a digging tool having a blade formed on the tip side in the moving direction and a digging tool, and has good thermal conductivity. A moving portion that moves forward and backward at a predetermined angle with respect to the flat surface of the metal plate, and an inclined plate-shaped heat radiation fin that is formed upright by digging up the metal plate with respect to the flat surface of the metal plate. It is provided with a pressing member provided apart from the forward side of the digging tool so as to press until it is substantially vertical, and the pressing member has a plate shape by advancing the digging tool and digging up the metal plate. After the heat radiation fins of the above are formed upright, when the next heat radiation fins are upright formed by the digging tool, the heat radiation fins are advanced together with the digging tool and come into contact with the previously inclined heat radiation fins formed upright. The gist is to press the metal plate until it is substantially perpendicular to the flat surface of the metal plate.

Further, the invention according to claim 2 is the invention according to claim 1, wherein the pressing member is attached to a swinging portion arranged in a moving portion, and the digging tool retracts due to the swinging portion. It is designed to retract toward the tip of the heat radiation fin.

Further, in the invention of claim 3, in the invention of claim 2, the side surface of the pressing member is brought into contact with the tip of the radiating fin that is inclined in the process of advancing the digging tool and digging up the metal plate. It is arranged in.

According to the heat radiating fin forming apparatus according to the present invention, since the pressing member is provided on the forward side of the digging tool at a distance, the following inclined plate-shaped heat radiating fin formed by digging up the metal plate can be used. When the heat radiation fins are dug up and formed upright, the pre-tilted heat radiation fins can be pressed until they are substantially perpendicular to the plane of the metal plate. As a result, even when the heat dissipation fins are formed using a digging tool, the heat dissipation fins can be formed while maintaining the effect of increasing the heat dissipation area and improving the heat dissipation efficiency by reducing the thickness and spacing of the heat dissipation fins. By forming the heat vertically, the heat can be rapidly increased, so that the heat dissipation efficiency can be further improved. Further, the pressing member has a simple structure in which the pressing member is provided apart from the forward side of the digging tool, and can be installed at low cost.

Further, since the pressing member is arranged in the swinging portion so that the digging tool retracts toward the tip of the heat radiating fin when the digging tool retracts, it is necessary to prevent the digging tool from coming into contact with the vertically formed heat radiating fin. Can be done. Therefore, even a thin heat radiating fin can be vertically formed upright.

Further, since the side surface of the pressing member is brought into contact with the tip of the inclined heat radiation fin in the process of advancing the digging tool and digging up the metal plate, the heat radiation fin is damaged by the pressing force of the pressing member. This is prevented, which can prevent the rapid rise of heat from being hindered.

It is a side view which shows an example of the heat radiation fin forming apparatus which concerns on this invention. It is a perspective view which shows the radiator formed by the heat radiation fin forming apparatus. (A) to (G) are process explanatory views which show the process of forming a radiating fin by a radiating fin forming apparatus. It is explanatory drawing which shows the heat dissipation state of the heat dissipation fin by this invention. (A) and (B) are plan views which show the modification of the heat radiation fin of this invention. It is explanatory drawing which shows the heat dissipation state of the conventional heat dissipation fin.

The heat radiation fin forming apparatus according to the present invention holds a digging tool having a blade formed on the tip side in the moving direction and the digging tool, and at a predetermined angle with respect to a flat surface of a metal plate having good thermal conductivity. The excavation is performed so as to press the moving portion that moves forward and backward while holding the metal plate and the inclined plate-shaped heat radiation fin that is formed upright by digging up the metal plate until it is substantially perpendicular to the plane of the metal plate. A pressing member provided apart from the forward side of the tool is provided, and the pressing member erects and forms the plate-shaped heat radiation fin by advancing the digging tool and digging up the metal plate, and then digging up. When the next radiating fin is upright formed by the tool, it is advanced together with the digging tool and brought into contact with the previously inclined radiating fin formed in advance so as to be substantially perpendicular to the plane of the metal plate. I try to press until it becomes.

Hereinafter, the heat radiation fin forming apparatus according to the present invention will be described in detail with reference to the drawings. FIG. 1 shows a heat radiation fin forming apparatus according to the present invention. The moving unit 1 is attached to a drive device (not shown) and moves forward and backward in a state of having a predetermined angle with respect to the plane of the metal plate 7 described later. A digging tool 2 is attached to the tip side of the moving portion 1 in the moving direction (right side in the drawing), and a blade portion 2a is formed on the tip side in the moving direction. As shown in FIG. 2, the width of the blade portion 2a is set smaller than the width of the metal plate 7. The width of the blade portion 2a is set according to the width of the heat radiation fin described later.

Pressing members 3 are provided apart from each other on the forward side of the digging tool 2. The pressing member 3 is formed of a plate-shaped metal or plastic, is bent in an L shape in the illustrated embodiment, and has a short side attached to the upper surface of the swinging portion 4 and a long side. The inner surface of the rocking portion 4 is attached to the side surface of the swinging portion 4, and is attached by a screw 5 so that the long side is always vertical. The tip end side of the pressing member 3 is provided apart from the forward side of the blade portion 2a of the digging tool 2. It is desirable that the width of the pressing member 3 is the same as the width of the blade portion 2a of the digging tool 2.

The swinging portion 4 is provided at the tip of the moving portion 1 and swings around the support shaft 4a as a fulcrum so that the pressing member 3 tilts at a predetermined angle in the forward direction. The rocking portion 4 always has its rear end side in contact with the moving portion 1 so that the pressing member 3 is vertical.

The digging tool 2 has a sliding contact surface 2b inclined from the blade portion 2a to the upper surface. The sliding contact surface 2b has a low coefficient of friction so as not to become a resistance when the heat radiation fin 6 is dug up and formed. By reducing the friction of the sliding contact surface 2b in this way, when the heat radiation fin 6 is dug up and formed, the metal plate 7 slides along the sliding contact surface 2b without receiving the resistance of the sliding contact surface 2b. , The flat plate-shaped heat radiation fin 6 can be formed upright. The inclination angle θ of the moving portion 1 and the digging tool 2 is appropriately set depending on the height and thickness of the heat radiation fin 6 described later, the material of the metal plate 7, and the like, but is generally 5 to 20 degrees. It is set. Although both sides of the digging tool 2 in the width direction are formed at substantially right angles, both sides of the bottom surface side on which the blade portion 2a is formed are formed in a tapered shape or an arc shape that becomes narrower toward the bottom surface. You may.

Next, with reference to FIG. 3, a method for forming the heat radiation fins 6 of the radiator 10 in an upright position will be described. The metal plate 7 used as the radiator 10 is formed of a metal material that can be plastically worked and has good thermal conductivity, for example, aluminum, an aluminum alloy, a copper alloy, or stainless steel. A material having a predetermined plate thickness is used.

First, as shown in FIG. 3A, the blade portion 2a of the digging tool 2 is brought into contact with a predetermined position on one surface separated from one end side of the metal plate 7, and then the digging tool 2 is moved by the moving portion 1. When the metal plate 2 is inserted into the metal plate 2 at a predetermined angle θ, the blade portion 2a of the digging tool 2 bites into one surface of the metal plate 7, and the height is low as shown in FIG. 3 (A). A thin small fin 6a is formed upright. At this time, it is desirable that the pressure for inserting the digging tool 2 into the metal plate 7 is set so as not to deform or stress the metal plate 7. Therefore, since the depth for inserting the digging tool 2 is shallow, the height of the small fin 6a is low.

Next, as shown in FIG. 3B, the digging tool 2 is moved forward so that the blade portion 2a is brought into contact with the position where the digging allowance can be obtained on the upstream side (left side in the drawing), and the small fin 6a at the tip is erected. By biting deeper than when it was formed, the next small fin 6a, which is higher than the previous small fin 6a, is formed upright. After that, while the digging tool 2 is sequentially deeply bitten, the standing formation of the small fins 6a formed earlier is repeated, and the process is terminated when the blade portion 2a reaches a predetermined depth.

In the step of forming the small fin 6a, the tip of the small fin 6a comes into contact with the pressing member 3 as the height of the small fin 6a increases. At this time, as the digging tool 2 moves, the pressing member 3 presses the small fins 6a that have been formed upright so as to be perpendicular to the metal plate 7.

Following the step of forming the small fins 6a, the process shifts to the step of forming the heat radiation fins 6 to form the heat radiation fins 6 having the same height. That is, as shown in FIG. 3C, the small fin 6a formed at the end is brought into contact with the blade portion 2a metal plate 7 of the digging tool 2 from a position where a digging allowance on the upstream side can be obtained, and then tilted. By moving forward while maintaining the angle until reaching a predetermined depth, the heat radiation fin 6 having a predetermined height is formed upright. When the heat radiation fin 6 is dug up in this way, the friction coefficient of the sliding contact surface 2b of the digging tool 2 is lowered, so that the heat radiation fin 6 slides along the sliding contact surface 2b without curling. The heat radiation fins 6 having a flat surface are formed upright. As shown in FIG. 3B, the heat radiating fin 6 is inclined at the same angle as the sliding contact surface 2b of the digging tool 2.

After that, the blade portion 2a of the digging tool 2 is brought into contact with the metal plate 7 from a position where a digging allowance can be obtained on the upstream side of the heat radiation fin 6 formed earlier, and then the blade portion 2a of the digging tool 2 is brought into contact with the metal plate 7 to a predetermined depth while maintaining the inclination angle. Move forward until you reach it. In this digging process, as shown in the enlarged view shown in the circle of FIG. 3C, the pressing member 3 comes into contact with the tip of the inclined heat radiating fin 6 formed earlier. Then, at the same time as moving the digging tool 2 to form the next heat radiation fin 6, the pressing member 3 presses the heat radiation fin 6 which was previously formed upright, and eventually, as shown in FIG. 3 (D), presses. By joining the side surface of the member 3 to the heat radiation fin 6, the heat radiation fin 6 is erected so as to be perpendicular to the metal plate 7.

In this way, after the heat radiation fins 6 are vertically formed upright, the digging tool 2 is retracted to the upstream side, but at this time, the pressing member 3 hits the heat radiation fins 6. Therefore, the pressing member 3 is retracted. That is, when the digging tool 2 is retracted, the swinging portion 4 to which the pressing member 3 is attached swings counterclockwise with the support shaft 4a as a fulcrum and presses. Lift the tip of the member 3 to a position where it does not touch the tip of the heat radiation fin 6. In this state, the digging tool 2 can be retracted.

Then, in a state where the blade portion 2a of the digging tool 2 is retracted to the upstream side of the heat radiation fin 6 formed earlier and is brought into contact with the metal plate 7 in order to erect the next heat radiation fin 6, the pressing member 3 Is restored to the vertical state as shown in FIG. 3 (F). After that, as shown in FIG. 3 (G), the blade portion 2a of the excavation tool 2 is retracted to the upstream side of the previously formed heat radiation fin 6 to move to the next upright formation of the heat radiation fin 6.

As described above, by performing the step of forming the heat radiation fins 6, the radiator 10 in which the plurality of heat radiation fins 6 perpendicular to the metal plate 7 are formed as shown in FIG. 2 is manufactured. By forming the vertical heat radiating fins 6 in this way, as shown in FIG. 4, the heat 103 generated from the heat source 102 of, for example, an electronic component, is radiated through the metal plate 7 as shown by the dotted line. The heat is radiated between the heat radiating fins 6 and through the heat radiating fins 6, but since the heat 103 has a property of rising in the vertical direction, the heat is smoothly raised from between the heat radiating fins 6 and radiated. Therefore, the heat dissipation efficiency can be improved.

5A and 5B show a modified example of the present invention, FIG. 5A shows an example in which the heat radiating fin 8 is formed in a corrugated shape, and FIG. 5B shows an example in which the heat radiating fin 9 is formed in a triangular waveform. There is. In this way, when forming the heat radiation fins in the waveform or the triangular wave, the blade portion 2a of the above-mentioned digging tool 2 is formed in a wavy shape or a triangular wave shape. Even when the blade portion 2a is formed in a wavy shape or a triangular wave shape to erect the heat radiation fins 8 and 9, the inclined heat radiation fins 8 and 9 are pressed by the pressing member 3 to make them vertical. When the heat radiation fins 8 and 9 are dug up in a waveform or a triangular wave and dug up by the tool 2, it is difficult to curl, so that it is possible to easily form vertical heat radiation fins.

Although the present invention has been specifically described above based on the examples, it goes without saying that the present invention is not limited to the above examples and can be variously modified without departing from the gist thereof. For example, as a metal plate, in addition to a plate-shaped metal material such as aluminum or copper having good thermal conductivity, processing or post-processing is performed, for example, printed wiring having the above metal material as a core. Heat dissipation fins may be formed in a part of a metal holding member, a housing that requires a heat dissipation function, etc. to dissipate heat generated by the substrate, the light emitting element, and the like. Further, in the above-described embodiment, the plurality of heat radiation fins are formed parallel to one end of the metal plate, but they may be formed at a predetermined angle. Further, when forming a plurality of fin groups, the formation angles may be appropriately different, such as making the first fin group and the second fin group orthogonal to each other.

1 Moving part 2 Digging tool 2a Blade part 3 Pressing member 4 Swing part 6 Heat dissipation fin 7 Metal plate 10 Radiator

Claims (3)

A digging tool with a blade formed on the tip side in the moving direction,
A moving part that holds the digging tool and moves it back and forth at a predetermined angle with respect to the flat surface of a metal plate with good thermal conductivity.
The inclined plate-shaped heat radiation fins formed by digging up the metal plate are provided apart from each other on the forward side of the digging tool so as to press them until they are substantially perpendicular to the plane of the metal plate. Equipped with a pressing member
The pressing member moves the digging tool forward to dig up the metal plate to erect and form the plate-shaped heat radiation fin, and then when the next radiant fin is upright formed by the digging tool, the digging tool A heat-dissipating fin forming apparatus, characterized in that the heat-dissipating fin forming apparatus is advanced together with the metal plate and is brought into contact with the pre-inclined heat-dissipating fins formed upright and pressed until substantially perpendicular to the plane of the metal plate. The first aspect of the present invention, wherein the pressing member is attached to a swinging portion disposed in a moving portion, and swings so as to retract toward the tip of the heat radiation fin when the digging tool retracts due to the swinging portion. Heat dissipation fin forming device. The heat radiation fin forming device according to claim 2, wherein the pressing member is arranged so that the side surface is in contact with the tip end portion of the heat radiation fin that is inclined in the process of advancing the digging tool and digging up the metal plate.

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