JP2018117107A - Heat radiation fin formation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat radiation fin formation device that can form a heat radiation fin of a heat radiator which is formed to be raised using a digging-up tool, almost vertically with respect to a flat surface of a metal plate.SOLUTION: The heat radiation fin formation device comprises: a digging-up tool 2 having a blade part 2a formed at a tip side in a moving direction; a movement part 1 that holds the digging-up tool 2 and moves back and forth the tool while having a predetermined angle with respect to a flat surface of a metal plate 7 with good thermal conductivity; and a pressing member 3 that is provided separately toward a moving-forward side of the digging-up tool 2 so as to press an inclined plate-like heat radiation fin 6, which is formed to be raised by digging up the metal plate 7, until the fin becomes almost vertical to the flat surface of the metal plate 7. After the plate-like heat radiation fin 6 is formed to be raised by moving forward the digging-up tool 2 to dig up the metal plate 7, the pressing member 3, when a next heat radiation fin 6 is formed to be raised using the digging-up tool 2, moves forward the fin together with the digging-up tool 2, contacts the fin with the precedent inclined heat radiation fin 6 formed to be raised lastly and then presses the fin until the fin becomes almost vertical with respect to the flat surface of the metal plate 7.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a radiating fin forming apparatus that digs up a plate-shaped radiating fin of a radiator for efficiently radiating heat generated from, for example, an electronic component or the like, and forms it with a tool.

  For example, in order to dissipate heat generated from an electronic component such as a semiconductor integrated circuit, a heat dissipator that has been generally put to practical use has a number of comb-shaped heat dissipating fins standing vertically on a base. By directly or indirectly joining the radiator to an electronic component or the like, heat is radiated outward through the radiation fins of the radiator. This radiator is usually manufactured by extruding or casting a metal material having good thermal conductivity made of aluminum.

  Moreover, the manufacturing method of the heat radiator which forms a radiation fin using a digging tool is disclosed by Unexamined-Japanese-Patent No. 2001-156224 (patent document 1) and Unexamined-Japanese-Patent No. 2005-142247 (patent document 2). The manufacturing method of a radiator shown in Patent Document 1 uses a heat sink material made of an aluminum alloy extruded shape member in which a projecting fin-forming work portion is formed on the upper surface side of a substrate portion, and the fin formation The workpiece part is dug up using a cutting tool such as a cutting tool, thereby forming a plurality of fins.

  The manufacturing method of a radiator shown in Patent Document 2 is a state in which a hoop-like metal plate having a good thermal conductivity and a digging tool having a blade portion formed on the tip side in the moving direction have a predetermined angle. By digging up the hoop-like metal plate, the plate-like heat radiation fins are integrally formed upright, and then from the upstream side of the formation pitch from the work surface on which the heat radiation fins are formed upright, The hoop-shaped metal plate and the digging tool are moved relative to each other to dig up the hoop-shaped metal plate, so that the next plate-shaped heat radiation fin is integrally formed upright, and thereafter the digging-up process is sequentially repeated to form the hoop-shaped metal plate. A plurality of heat radiation fins are continuously formed.

JP 2001-156224 A JP 2005-142247 A

  As shown in Patent Documents 1 and 2 described above, when the radiating fins are formed using the digging tool, the radiating fins 101 curl and stand up from the metal plate 100 as shown in FIG. The plate thickness on the base end side becomes thicker and gradually thinner as it reaches the tip end. For this reason, the space | interval G1 of the base end side of the adjacent radiation fin 101 is narrow, and the space | interval G2 of the front end side is formed wide. When the heat radiation fin 101 of this form is used as a heat radiator, for example, when heat 103 generated from the heat source 102 such as an electronic component is dissipated, the heat 103 is interposed between the heat radiation fins 101 through the metal plate 100 as indicated by a dotted line. Then, the heat is radiated through the heat radiation fin 101. Since heat has a property of rising in the vertical direction, when heat is dissipated from between the heat radiating fins 101, if the heat radiating fins 101 are curled, the heat 103 indicated by a dotted line meanders while hitting the side surfaces of the heat radiating fins 101. To rise. For this reason, the heat dissipating fins 101 may be reheated, which is a factor of reducing the heat dissipating efficiency.

  In order to quickly raise the heat 103 dissipated through the metal plate 100, it is desirable to form the radiating fins upright vertically. For this reason, the metal material is manufactured by extruding or casting. Yes. However, the extrusion process or the casting process cannot reduce the thickness and interval of the heat dissipating fins. Therefore, the heat dissipating area is reduced, so that the heat dissipating efficiency cannot be increased, and there is a problem that the size is necessarily increased. On the other hand, the method of forming the radiating fins using the digging tool can increase the radiating area and increase the radiating efficiency by reducing the thickness and spacing of the radiating fins. There was no means to form.

  Then, the subject of this invention is providing the radiation fin formation apparatus which can form the radiation fin of the heat sink standingly formed using a digging tool substantially perpendicularly with respect to the plane of a metal plate.

  In order to solve the above-mentioned problems, the heat dissipating fin forming device according to the invention of claim 1 has a digging tool in which a blade portion is formed on the tip side in the moving direction, and holding the digging tool, and has a good thermal conductivity. A moving portion that moves forward and backward in a state having a predetermined angle with respect to the plane 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 plane of the metal plate A pressing member provided on the advancing side of the digging tool so as to press until substantially vertical, and the pressing member advances the digging tool forward to dig up the metal plate to form a plate shape When the next radiating fin is erected by the digging tool after the radiating fin is erected, the radiating fin is moved forward together with the digging tool and erected before It is summarized as to press until substantially perpendicular to the advance inclined the radiating fins abutted thereby to the plane of the metal plate.

  According to a second aspect of the present invention, in the first aspect of the present invention, the pressing member is attached to a swinging portion disposed in the moving portion, and the digging tool is retracted by the swinging portion. The heat sink is retracted in the direction of the tip.

  Further, in the invention described in claim 3, in the invention described in claim 2, the pressing member is caused to abut the side surface on the tip of the radiating fin inclined in the process of digging up the tool and digging up the metal plate. It is arranged.

  According to the heat dissipating fin forming apparatus according to the present invention, since the pressing member is provided apart from the advancing side of the digging tool, the inclined plate-shaped radiating fin formed upright by digging the metal plate is When the radiating fins are dug up and formed upright, the previously inclined radiating fins can be pressed until they are substantially perpendicular to the plane of the metal plate. As a result, even when radiating fins are formed using a digging tool, by reducing the thickness and spacing of the radiating fins, the radiating fins are maintained while maintaining the effect of increasing the radiating area and increasing the radiating efficiency. Since the heat can be quickly raised by forming the erected vertically, the heat radiation efficiency can be further improved. In addition, the pressing member has a simple configuration that is provided only apart from the advancing side of the digging tool and can be installed at a low cost.

  Also, since the pressing member is arranged on the swinging part so as to retract in the direction of the tip of the radiating fin when the digging tool is retracted, it is possible to prevent contact with the radiating fin formed vertically. Can do. For this reason, even if it is a thin radiating fin, it becomes possible to stand vertically.

  Further, since the side surface of the pressing member is in contact with the tip of the radiating fin inclined in the process of digging up the metal plate by advancing the digging tool, the radiating fin is damaged by the pressing force of the pressing member. This can prevent the rapid increase in heat.

  It is a side view which shows an example of the radiation fin formation apparatus concerning this invention.   It is a perspective view which shows the heat radiator formed by the radiation fin formation apparatus.   (A) thru | or (G) is process explanatory drawing which shows the formation process of the radiation fin by the radiation fin formation apparatus.   It is explanatory drawing which shows the heat dissipation state of the radiation fin by this invention.   (A) (B) is a top view which shows the modification of the radiation fin of this invention.   It is explanatory drawing which shows the heat dissipation state of the conventional radiation fin.

  The radiating fin forming device according to the present invention has a digging tool having a blade formed on the tip side in the moving direction, and holding the digging tool, and at a predetermined angle with respect to the plane of the metal plate having good thermal conductivity. The digging and raising so as to press the moving part that moves forward and backward in the state of holding and the inclined plate-like heat radiation fin that is formed upright by digging and raising the metal plate until it is substantially perpendicular to the plane of the metal plate. A pressing member spaced apart on the advance side of the tool, and the pressing member advances the digging tool and digs up the metal plate to raise the plate-like radiation fin, and then digs up When the next radiating fin is erected by a tool, it is advanced together with the digging tool, and the radiated fin previously inclined to be erected before is formed. It is to press until substantially perpendicular to the plane of the metal plate by contact.

  Hereinafter, a heat radiating fin forming apparatus according to the present invention will be described in detail with reference to the drawings. FIG. 1 shows a radiating fin forming apparatus according to the present invention. The moving unit 1 is attached to a driving device (not shown), and moves forward and backward with a predetermined angle with respect to a plane of a metal plate 7 to be described later. A digging tool 2 is attached to the leading end side of the moving portion 1 in the moving direction (right side direction in the figure), and a blade portion 2a is formed on the leading end side in the moving direction. The width of the blade 2a is set smaller than the width of the metal plate 7 as shown in FIG. In addition, the width | variety of the blade part 2a is set according to the width | variety of the radiation fin mentioned later.

  On the forward side of the digging tool 2, a pressing member 3 is provided separately. The pressing member 3 is formed of a plate-like metal or plastic, and is bent in an L shape in the illustrated embodiment. The short side is attached to the upper surface of the swinging portion 4 and the long side Is attached to the side surface of the swinging portion 4 with screws 5 so that the long side is always vertical. And the front end side of the pressing member 3 is spaced apart and provided in the advance side of the blade part 2a of the digging tool 2. The width of the pressing member 3 is desirably the same as the width of the blade portion 2a of the digging tool 2.

  The swing part 4 is provided at the tip of the moving part 1 and swings about the support shaft 4a as a fulcrum so that the pressing member 3 is inclined at a predetermined angle in the forward direction. The swinging portion 4 is normally in contact with the moving portion 1 at the rear end side so that the pressing member 3 is vertical.

  The digging tool 2 is formed with 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 radiating fin 6 is dug up and formed. Thus, by reducing the friction of the sliding contact surface 2b, when the heat radiation fin 6 is dug up and formed, the metal plate 7 is slid along the sliding contact surface 2b without receiving the resistance of the sliding contact surface 2b. The flat plate-like heat radiation fin 6 can be formed upright. In addition, the inclination angle θ of the moving part 1 and the digging tool 2 is appropriately set depending on the height of the radiating fin 6 described later, the plate thickness, the material of the metal plate 7, etc., but is generally from 5 degrees to 20 degrees. Is set. Although both sides in the width direction of the digging tool 2 are formed substantially at right angles, both sides on the bottom surface side where the blade portion 2a is formed are formed in a tapered shape or an arc shape that becomes narrower as it reaches the bottom surface. May be.

  Next, with reference to FIG. 3, a method for forming the radiating fins 6 of the radiator 10 upright will be described. The metal plate 7 used as the radiator 10 can be plastically processed and is formed of a material having good thermal conductivity, such as aluminum, aluminum alloy, copper alloy, or stainless steel, A material having a predetermined plate thickness is used.

  First, as shown in FIG. 3 (A), the blade part 2a of the digging tool 2 is brought into contact with a predetermined position on one side farther from one end side of the metal plate 7, and then the digging tool 2 is moved by the moving part 1. When inserted into the metal plate 2 in a direction indicated by an arrow with 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. Thin thin fins 6a are formed upright. At this time, it is desirable to set the pressure for inserting the digging tool 2 into the metal plate 7 so as not to deform or stress the metal plate 7. For this reason, since the depth which inserts the digging tool 2 is shallow, the height of the small fin 6a becomes low.

  Next, as shown in FIG. 3B, the digging tool 2 is moved forward to bring the blade portion 2a into contact with the upstream side (left side in the drawing) at a position where the digging allowance is obtained, and the small fin 6a is raised. By encroaching deeper than when formed, the next small fin 6a higher than the previous small fin 6a is formed upright. Thereafter, the erection of the small fins 6a that have been erected first is repeated while the digging and digging tool 2 is digging deeply, and the process ends when the blade 2a reaches a predetermined depth.

  In the process of forming the small fin 6a, the tip comes into contact with the pressing member 3 as the small fin 6a becomes higher. At this time, along with the movement of the digging tool 2, the pressing member 3 presses the small fin 6 a that is first formed upright with respect to the metal plate 7.

  Subsequent to the process of forming the small fins 6a, the process proceeds to the process of forming the heat radiating fins 6 to form the heat radiating fins 6 having the same height. That is, as shown in FIG. 3 (C), after the last formed small fin 6a is brought into contact with the blade 2a metal plate 7 of the digging tool 2 from the position where the digging allowance on the upstream side is obtained, the inclination The heat dissipating fins 6 having a predetermined height are formed upright by moving forward until reaching a predetermined depth while maintaining the angle. Since the friction coefficient of the sliding contact surface 2b of the digging tool 2 is lowered when the radiating fin 6 is dug in this way, the radiating fin 6 is slidably contacted along the slidable contact surface 2b. The radiating fin 6 having a flat surface is formed upright. The radiating fins 6 are inclined at the same angle as the sliding contact surface 2b of the digging tool 2 as shown in FIG.

  Then, after digging up from the position where the excavation allowance on the upstream side of the previously formed radiating fin 6 is obtained, the blade 2a of the tool 2 is brought into contact with the metal plate 7, and then kept at a predetermined depth while maintaining the inclination angle. Move forward until it reaches. In this excavation process, as shown in the enlarged view in the circle of FIG. 3C, the pressing member 3 comes into contact with the tip of the inclined radiating fin 6 formed earlier. Then, the excavating tool 2 is moved to form the next radiating fin 6, and at the same time, the pressing member 3 presses the radiating fin 6 erected first, and finally, as shown in FIG. When the side surface of the member 3 is joined to the heat radiating fin 6, the heat radiating fin 6 is erected so as to be perpendicular to the metal plate 7.

  As described above, the radiating fins 6 are vertically erected, and then the digging and raising tool 2 is retracted upstream. At this time, the pressing member 3 hits the radiating fins 6. Therefore, the pressing member 3 is retracted. That is, the swinging portion 4 to which the pressing member 3 is attached, when the digging tool 2 is moved back, swings counterclockwise as shown in FIG. The tip of the member 3 is lifted to a position where it does not contact the tip of the radiating fin 6. In this state, the digging tool 2 can be retracted.

  In the state where the blade portion 2a of the digging tool 2 is retracted to the upstream side of the previously formed radiating fin 6 and brought into contact with the metal plate 7 to stand the next radiating fin 6, the pressing member 3 As shown in FIG. 3 (F), the vertical state is restored. Thereafter, as shown in FIG. 3 (G), the blade portion 2a of the digging tool 2 is moved back further to the upstream side than the previously formed radiating fin 6 to shift to the next standing formation of the radiating fin 6.

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

  5 shows a modification of the present invention, FIG. 5A shows an example in which the radiating fins 8 are formed in a waveform, and FIG. 5B shows an example in which the radiating fins 9 are formed in a triangular waveform. Yes. Thus, when forming a radiation fin in a waveform or a triangular wave, the blade part 2a of the digging tool 2 mentioned above is formed in a wave shape or a triangular wave shape. Even when the blade portion 2a is formed in a wave shape or a triangular wave shape and the radiating fins 8 and 9 are erected, the inclined radiating fins 8 and 9 are pressed by the pressing member 3 to be vertical. Note that when the heat radiation fins 8 and 9 are dug up in a waveform or a triangular wave and are dug up by the tool 2, it is difficult to curl, so that it is possible to easily form vertical heatsink fins.

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

DESCRIPTION OF SYMBOLS 1 Moving part 2 Digging tool 2a Blade part 3 Pressing member 4 Oscillating part 6 Radiation 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 unit that holds the digging tool and moves it back and forth in a state having a predetermined angle with respect to the plane of the metal plate having good thermal conductivity,
The inclined plate-like heat radiation fins that are formed upright by digging up the metal plate are provided so as to be spaced apart from the advancing side of the digging tool so that they are pressed until they are substantially perpendicular to the plane of the metal plate. A pressing member,
The pressing member, when the digging tool is moved forward to dig up the metal plate to raise the plate-like radiating fin, and then the digging tool raises the next radiating fin to raise the digging tool. And a heat-radiating fin forming apparatus, wherein the heat-radiating fin is moved forwardly and brought into contact with the previously inclined heat-radiating fin that has been formed upright and pressed until it is substantially perpendicular to the plane of the metal plate.   The pressing member is attached to a swinging part disposed in the moving part, and swings so that the swinging part is retracted in a tip direction of the radiating fin when the digging tool is retracted by the swinging part. Radiating fin forming device.   The heat dissipating fin forming apparatus according to claim 2, wherein the pressing member is disposed so that a side surface thereof is in contact with a tip end portion of the heat dissipating fin inclined in a process in which the excavating tool is advanced and the metal plate is excavated.

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