JP2005142247A - Radiator and manufacturing method therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a manufacturing method of a radiator with which a hoop-like metal plate whose thermal conductivities are sufficient can be used, heat dissipation efficiency can be raised, and cost can be reduced. <P>SOLUTION: The hoop-like metal plate 2 whose thermal conductivity is sufficient, and a digging-up tool 7 in which blades 7a are formed in at least two faces of a tip side in a moving direction, are relatively moved in a state where a prescribed angle is given. The hoop-like metal plate 2 is dug downward. Thus, plate-like radiation fins 3 are integrally erected and formed. The hoop-like metal plate 2 and the digging-up tool 7 are relatively moved from an upstream-side rather than a worked face 2a where the radiation fins 3 are erected and formed by a formation pitch, and the hoop-like metal plate 2 is dug up. Thus, the next plate-like radiation fin 3 is integrally erected and formed. A digging up process is sequentially repeated and a plurality of radiation fins 3 are continuously formed on the hoop-like metal plate 2. The hoop-like metal plate 2 is cut by prescribed length and the radiator 1 is formed. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention is provided in an electronic component such as a semiconductor integrated circuit, for example, and a radiator for efficiently radiating heat generated from the electronic component or the like, and a plate-shaped heat radiation fin from a hoop-shaped metal plate are integrally raised. The present invention relates to a method of manufacturing a radiator.

  Electronic components such as semiconductor integrated circuits, which are becoming smaller and higher in density, generate heat during use. Therefore, a heatsink for heat dissipation is joined to the package that houses the electronic components, and if necessary. Forced cooling is performed by a cooling fan.

  In order to dissipate heat from electronic components such as semiconductor integrated circuits, a heat radiator that has been generally used in practice has a large number of comb-shaped heat dissipating fins standing vertically on a base. By joining the heat sink to the package, heat generated during the operation of the semiconductor integrated circuit is transmitted to the heat radiator to dissipate outward. Such a radiator is usually manufactured by extruding or casting a metal material made of aluminum and having good thermal conductivity.

  In addition to this, a radiator having the form shown in Japanese Patent Laid-Open No. 2001-102782 (Patent Document 1) has also been proposed. This radiator 100 shown in Patent Document 1 has a large number of tongue-like fins spaced apart in the front-rear direction by shaving the ridges 102 of the extruded aluminum material 101 with a cutting tool 103 as shown in FIG. 104 is provided to form the radiator 100.

  In general, the heat dissipation efficiency of a radiator is almost proportional to the surface area of the entire radiator. Therefore, in order to increase the heat dissipation effect of the radiator, it is necessary to increase the surface area by forming a large number of heat radiation fins. However, since the former radiator is manufactured for extrusion molding and casting methods, there is a limit to reducing the thickness of the radiating fins and forming a large number of radiating fins, which can further enhance the radiating effect. It was difficult.

  Moreover, although the manufacturing method of the heat radiator shown in patent document 1 has the characteristic that many thin heat-radiation fins can be formed, since the aluminum raw material 101 in which the convex stripes 102 were formed is formed by extrusion molding, the raw material 101 is formed. In order to manufacture, a large-scale molding facility is necessary, which inevitably increases the cost. In addition, since it is difficult to form the material 101 thinly by extrusion molding, a radiator manufactured using this material 101 inevitably has a thick plate portion t1 of the base portion. There is a problem that the heat transfer efficiency to the heat radiating fins deteriorates and the heat radiating efficiency cannot be increased. Furthermore, the metal material for the radiator that can be formed by extrusion molding is limited to aluminum and its alloys, and a metal material such as copper having high heat transfer efficiency cannot be used. For this reason, raising the heat dissipation efficiency as a heat radiator has reached the limit.

JP 2001-102782 A

  The problem to be solved by the present invention is to provide a method for manufacturing a radiator that can use a hoop-shaped metal plate having various thermal conductivities and that can increase the heat dissipation efficiency and reduce the cost. It is to provide.

In order to solve the above problems, the invention described in claim 1 is a method of manufacturing a radiator in which a thin plate-like heat radiation fin is integrally formed on a metal plate,
A hoop-shaped metal plate such as aluminum or copper with good thermal conductivity, and a digging tool having blade portions formed on at least two surfaces on the tip side in the moving direction,
Blade portions formed on at least two surfaces of the digging tool by relatively moving the hoop-shaped metal plate and the digging tool in a state having a predetermined angle between the hoop-shaped metal plate and the digging tool. By digging up the hoop-like metal plate, the plate-like heat radiation fin is integrally formed upright,
The hoop-like metal plate and the digging tool are relatively moved from the upstream side of the forming pitch with respect to the work surface formed by the standing formation of the radiation fins, and the hoop-like metal plate is dug up by the digging tool. Thus, the following plate-like heat radiation fins are integrally formed upright, and then the digging process is sequentially repeated to form a plurality of heat radiation fins continuously on the hoop-shaped metal plate.

  In the invention according to claim 2, the digging tool is formed with a blade portion perpendicular to the moving direction at the tip on the bottom surface side, and tapered surfaces parallel to the moving direction on both sides on the bottom surface side, The gist is to cut the side surfaces of the radiating fins with the tapered blades formed at the tips of the tapered surfaces on both sides, and to erect the radiating fins with the blade portions at the tips.

  Further, in the invention according to claim 3, the digging tool has two inclined surfaces formed at a predetermined angle with respect to the bottom surface, and the two inclined surfaces are formed in the vicinity of the blade portion. The other inclined surface is formed higher than the one inclined surface separated from each other by the blade part, and the radiating fin dug up by the blade part is curled by the corner part of the other inclined surface and the step part. Is the gist.

  Furthermore, in the invention according to claim 4, the digging tool is formed with two blade portions inclined with respect to the moving direction, and the two blade portions are dug down toward the inside of the hoop-shaped metal plate. The gist is that the two plate-like radiating fins substantially parallel to the two blade portions are integrally formed upright.

  According to a fifth aspect of the present invention, the hoop-shaped metal plate formed by continuously forming the plurality of heat radiation fins cuts between the adjacent heat radiation fins for each predetermined number of the heat radiation fins. The gist is to form a radiator.

  The invention according to claim 6 is a radiator in which a thin plate-shaped heat radiation fin is integrally formed on a metal plate, and the heat radiator is a hoop-shaped member made of aluminum, copper, or the like having good thermal conductivity. A plurality of radiating fins erected by digging up one side of the metal plate and repeatedly digging up with a tool are integrally formed upright at a predetermined pitch, and a recess is formed between the radiating fins by digging up with the digging tool. The gist is that the thickness of the recess is formed smaller than the thickness of the hoop-shaped metal plate.

  According to the present invention, a plate-like heat radiating fin is formed by digging down one side of a hoop-like metal plate toward the inside of the hoop-like metal plate using a digging tool having blade portions formed on at least two sides. In addition to the aluminum hoop-like metal plate, it is possible to use any hoop-like metal plate such as copper having good thermal conductivity, so that electronic components and the like can be used. It becomes possible to select and use a radiator with high heat dissipation efficiency suitable for heat dissipation. Further, since a flat hoop-like metal plate can be used, the cost can be reduced. Furthermore, since the hoop-shaped metal plate is used as a raw material, it is possible to perform a continuous operation of radiating fins for a long time, thereby reducing the number of manufacturing steps and reducing the cost.

  According to the second aspect of the present invention, in addition to the blade portion, a pair of tapers are formed at the tip portions of the tapered surfaces formed on both sides of the bottom surface side in order to erect the radiating fins at the bottom surface side tip of the digging tool. Since the blade is formed, when the hoop-shaped metal plate is dug down by the blade at the tip to form the heat radiation fin, the pair of taper blades cut both side surfaces of the heat radiation fin, so the heat radiation fin can be easily raised. It becomes possible to form. Further, when the heat radiating fins are sequentially dug up, it is possible to prevent the occurrence of burrs and shavings due to the displacement of the dug up tool by the pair of taper blades.

  Further, according to the invention described in claim 3, since the step portion is formed between the two slopes, the radiating fin digged up by the blade portion of the digging tool is curled by the corner portion of the step portion. Is possible. In particular, by curling the tip of the radiating fin at the initial stage of digging up, the edge formed at the tip becomes downward, ensuring safety even if the operator touches the tip of the radiating fin during user assembly work It becomes possible to do.

  Furthermore, according to the invention described in claim 4, two blade portions that are inclined with respect to the moving direction are formed on the digging tool, and the hoop-shaped metal plate is dug down by the two blade portions, thereby forming a plate-like shape. The heat dissipating fins can be formed upright integrally. Furthermore, even when the radiating fins are sequentially digged up, even if the digging tool is misaligned and burrs and shavings are likely to occur, it can be prevented by the two inclined blade portions.

  Further, according to the invention described in claim 5, since the hoop-shaped metal plate is used, it is possible to continuously form the heat radiation fins, and the hoop in which the heat radiation fins are formed upright in this way. It is possible to continuously manufacture a heat radiator having a predetermined length by cutting the metal plate every predetermined number of heat radiation fins.

  According to the invention described in claim 6, since one surface of the hoop-shaped metal plate is dug up and repeatedly dug up by a tool, the plurality of heat dissipating fins are integrally formed upright at a predetermined pitch, thereby improving the heat dissipating efficiency. It becomes possible. In addition, since the thickness of the recess formed by digging up with the digging tool between the radiating fins is small, the heat generated from the electronic components etc. can be transferred to the plurality of radiating fins in a short time, further improving the radiating efficiency. It becomes possible.

  A radiator in which a thin plate-like heat radiation fin is integrally formed on a metal plate is manufactured by the following method. This radiator uses a hoop-shaped metal plate such as aluminum or copper having a good thermal conductivity as a material. Moreover, the tool which integrally forms a plate-shaped radiation fin uses the digging tool by which the blade part was formed in the at least 2 surface of the front end side of a moving direction. And a blade formed on at least two surfaces of the digging tool by relatively moving the hoop-shaped metal plate and the digging tool in a state having a predetermined angle between the hoop-shaped metal plate and the digging tool. By digging up the hoop-like metal plate by the portion, the plate-like heat radiating fins are integrally formed upright. Further, the hoop-shaped metal plate and the digging tool are relatively moved from the upstream side of the radiating fin forming pitch from the work surface formed by standing formation of the radiating fin, and the hoop-shaped by the digging tool. By digging up the metal plate, the following plate-like heat radiation fins are integrally formed upright. By sequentially repeating the digging process, the plurality of heat radiating fins are continuously formed on the hoop-shaped metal plate. Thereafter, the hoop-shaped metal plate is cut for every predetermined number of the heat dissipating fins, whereby a heat radiator having a predetermined length is manufactured.

  FIG. 1 shows a state where a radiator according to the first embodiment of the present invention is manufactured, and the radiation fins 3 of the radiator 1 are formed by the process shown in FIG. First, the configuration of the radiator 1 shown in FIG. 7 will be described.

  The metal material used for the radiator 1 can be plastically processed and has a predetermined thermal conductivity, such as aluminum, aluminum alloy, copper alloy, or stainless steel. A hoop-like metal plate 2 having a plate thickness is used. Then, the radiator 1 shown in FIG. 7 has a plurality of thin plate-like heat dissipations on one side of the hoop-like metal plate 2 by the forming method shown in FIG. 3 at right angles to the longitudinal direction of the hoop-like metal plate 2. The fin 3 is integrally formed. The base end portions of the plurality of radiating fins 3 are integrally connected to one surface of the hoop-shaped metal plate 2 from a recess 4 formed by standing the radiating fins 3. Moreover, the front end side of the heat radiating fins 3 is slightly curved and protrudes so as to be separated from the hoop-like metal plate 2, and the plurality of heat radiating fins 3 are formed to protrude at substantially the same angle and at substantially the same interval.

  Further, the plurality of heat radiating fins 3 of the radiator 1 are formed such that the base end portion connected to the hoop-shaped metal plate 2 is thick and thin as it reaches the hoop-shaped front end portion. And the front-end | tip part of the radiation fin 3 is curled so that it may go to the direction of the hoop-shaped metal plate 2, and when it sees from the front end side upper side of the radiation fin 3, the front-end | tip part is formed in the substantially bowl shape. In this way, by curling the tip portion of the radiating fin 3, the sharp tip is prevented from directly touching an operator or the like, thereby preventing injury.

  Moreover, since the plate | board thickness of the radiation fin 3 is formed by digging up from one side of the hoop-shaped metal plate 2, it can be made thin. For example, a thickness of about 0.5 mm to 0.1 mm is suitable as a heat radiating fin of a radiator used for a small electronic component. In addition, the plate | board thickness of each radiation fin 3 may be the same thickness, and may form it in a different thickness, respectively. Furthermore, if the plate | board thickness of the radiation fin 3 is formed so that a base end part is thick and it reaches to a front-end | tip part, since a base end part is thick, a heat capacity is large and it becomes easy to receive the heat from the hoop-shaped metal plate 2. FIG. Thereafter, the heat is sequentially dissipated as heat is transmitted toward the tip, and the tip can be easily dissipated even with a small heat capacity. Since the radiating fin 3 changes the plate thickness according to heat transfer and radiating heat, the radiator 1 having high radiating efficiency can be obtained.

  Next, a method for manufacturing the radiator 1 will be described with reference to FIGS. The aforementioned hoop-shaped metal plate 2 has a plate thickness and a width necessary for forming the radiator 1, is formed in a long shape as is well known, and a supply device (not shown) on the left side of FIG. It is wound around. The hoop-like metal plate 2 sequentially supplied from the supply device is previously punched with pilot holes 2a having a function as a positioning and a stopper at a formation pitch of the radiation fins 3 by a pressing device (not shown). The hoop-shaped metal plate 2 with the pilot holes 2a thus formed is placed on the die 5 shown in FIG. At this time, the pilot hole 2a is fitted into the pilot pin 6 provided on the die 5, and the position of the hoop-shaped metal plate 2 is determined. Thereafter, the radiating fins 3 are erected by the tool 7 by digging up the hoop-shaped metal plate 2 placed on the die 5.

  As shown in FIG. 8A, the digging tool 7 has a blade portion 7a perpendicular to the moving direction at the tip on the bottom surface side. Furthermore, two inclined surfaces 7b and 7c inclined by a predetermined angle from the blade portion 7a toward the upper surface side are formed. These two inclined surfaces 7b and 7c are formed in parallel, the other inclined surface 7c is formed higher than one inclined surface 7b continuous from the blade portion 7a, and is separated by a step portion 7d formed near the blade portion 7a. . Further, tapered surfaces 7e parallel to the moving direction are formed on both sides on the bottom surface side, and a tapered blade 7f is formed at the tip. The digging tool 7 configured in this manner is attached to a drive device (not shown) with an inclination of a predetermined angle θ so that the rear end side becomes higher with respect to the hoop-like metal plate 2. The inclination angle θ of the digging tool 7 is appropriately set depending on the height of the heat radiating fin 3, the plate thickness, the material of the hoop-like metal plate 2, etc., but is generally set to 5 to 20 degrees.

  First, as shown in FIG. 3A, after the digging tool 7 is brought into contact with one surface of the hoop-shaped metal plate 2, the digging tool 7 is moved to the other side of the hoop-shaped metal plate 2 at a predetermined angle by the driving device. Move in the direction of the direction. Then, as shown in FIG. 3B, the hoop-like metal plate 2 is dug up by the blade portion 7a at the tip of the digging tool 7, and the tip of the thin radiating fin 3 stands up. When the tip of the radiating fin 3 is dug up and reaches the stepped portion 7d of the tool 7, the tip of the radiating fin 3 is bent and its direction is changed by the upper edge. When the digging tool 7 is further moved, as shown in FIG. 3C, the hoop-like metal plate 2 is dug up gradually and deeply, and the radiating fins 3 are extended and the recesses 4 are formed. Thus, when the hoop-like metal plate 2 is dug up, both walls of the recess 4 are cut by the tapered blades 7f formed on both sides of the tip of the dug-up tool 7. Then, as shown in FIG. 3D, when the digging tool 7 is moved to a predetermined position, the radiating fins 3 having a predetermined height are formed upright from the inside of the recess 4 of the hoop-shaped metal plate 2, and the recess A processed surface 2 b is formed in 4. The digging tool 7 moves back to the standby position and returns.

  When the next radiating fin 3 is formed after the radiating fin 3 is erected, the hoop-shaped metal plate 2 is sent to the downstream side on the right side of FIG. 3 and piloted to the pilot pin 6 provided on the die 5. The hole 2a is fitted and the position of the hoop-shaped metal plate 2 is determined. Thereafter, the excavating tool 7 is moved, and as shown in FIG. 3A, the blade portion 7a is brought into contact with the upstream side of the processing surface 2b. This contact position is set to a position where a predetermined digging allowance t is obtained from the processed surface 2b to the other surface side of the hoop-shaped metal plate 2. Incidentally, the excavation allowance t is set to about 0.3 mm to 0.8 mm.

  Thereafter, the digging tool 7 is moved to the other surface direction of the hoop-shaped metal plate 2 by a predetermined angle, and the hoop-shaped metal plate 2 is digged up by the blade portion 7a at the tip of the digging tool 7 as shown in FIG. The tip of the thin radiating fin 3 is raised. At this time, the tip of the radiation fin 3 is dug up, and the tip is bent by the step portion 7d of the tool 7 to change the direction. When the digging tool 7 is further moved, as shown in FIG. 3C, the hoop-like metal plate 2 is gradually digged up deeply, and the radiating fins 3 are extended and the recesses 4 are formed. Also at this time, as described above, the tapered blades 7 f formed on both sides of the tip of the digging tool 7 cut both walls of the recess 4. Then, as shown in FIG. 3 (D), when the digging tool 7 is moved to a predetermined position, from the inside of the recess 4 of the hoop-like metal plate 2, the height of the radiating fin 3 formed before is almost the same. The heat radiating fins 3 are formed upright, and the processed surface 2 b is formed in the recess 4. Then, the digging tool 7 moves back to the standby position and returns.

  Further, in order to erect the next radiating fin 3, the hoop-shaped metal plate 2 is sent downstream and positioned by the pilot pin 6 provided on the die 5, and as described above, the blade portion 7 a of the digging tool 7. Is brought into contact with the upstream side of the work surface 2b, and the digging tool 7 is moved to erect the radiation fins 3. Thereafter, by repeating this upright formation process, a plurality of heat radiation fins 3 are continuously formed at a predetermined pitch on the hoop-shaped metal plate 2 as shown in FIG.

  After the radiating fins 3 are formed in this way, the heat radiating device 1 shown in FIG. 7 is manufactured by cutting at the position of the cut line CT indicated by a two-dot chain line in FIG. The interval between the cut lines CT is determined for each predetermined number of radiating fins 3. In the radiator 1 shown in FIG. 7, the pilot hole 2a used in the step of forming the radiating fin 3 is left. However, in order to use the pilot hole 2a as a mounting hole, all or part of the pilot hole 2a is used. Alternatively, the pilot holes 2a may be removed by cutting at positions on both sides of the radiating fins 3, as indicated by a two-dot chain line. Furthermore, you may shape both sides of the radiation fin 3 in a suitable shape.

  As described above, the tapered surfaces 7e parallel to the moving direction are formed on both sides of the bottom surface of the digging tool 7, and the tapered blade 7f is formed at the tip thereof. When the digging tool 7 is moved to dig up the hoop-like metal plate 2, the digging tool 7 enters the hoop-like metal plate 2 and is recessed by the taper blade 7 f as shown in FIGS. 5 (A) to (C). 4, the lateral width of the recess 4 gradually increases toward the downstream side as shown in FIG. 4. Thereby, as shown in FIG. 2, the radiation fin 3 is formed in a substantially trapezoidal shape having a narrow width on the distal end side and becoming wider toward the proximal end side. Moreover, when forming the next radiation fin 3 after the radiation fin 3 formed previously, the taper cutting surfaces 7g of both walls cut by the taper blade 7f are also dug up integrally. For example, when both sides of the digging tool 7 are formed at right angles, one wall of the recess 4 is cut when the position in the width direction of the digging tool 7 and the hoop-shaped metal plate 2 is relatively displaced. As a result, there arises a problem that thread-like chips are generated. However, by forming the tapered blade 7f on both sides of the digging tool 7, even if the digging tool 7 and the hoop-like metal plate 2 are displaced in the width direction, the taper cutting surface 7g is also digged up by the taper blade 7f. The generation of chips is prevented in advance.

  As described above, the recess 4 is formed on the one surface side of the hoop-shaped metal plate 2 by digging and raising the hoop-shaped metal plate 2 with the digging tool 7 to form the radiating fins 3 upright. Thereby, plate | board thickness t0 of the recess 4 until it reaches the radiation fin 3 of the radiator 1 becomes thin. When the radiator 1 is bonded to a package 8 containing a semiconductor integrated circuit, for example, as shown in FIG. 7, the heat generated from the semiconductor integrated circuit is quickly transmitted to the radiation fin 3, Since heat is radiated, the heat radiation efficiency can be increased.

  The digging tool 7 forms a chamfered portion of the blade portion 7a as shown in FIG. Since the digging tool 7 digs up the hoop-shaped metal plate 2 with the blade portion 7a, the life of the blade portion 7a is shortened when formed at an acute angle. However, the lifetime can be extended by forming the chamfered portion. Moreover, although the said digging tool 7 formed the step part 7d in the vicinity of the blade part 7a, depending on the shape of the radiating fin 3 to be digged up, as shown in FIG. Also good.

  When the digging tool 7 is moved and the radiating fins 3 are digged up, the radiating fins 3 increase in height while slidably contacting the slope 7b of the digging tool 7. Therefore, the plate thickness of the radiation fin 3 varies depending on the frictional resistance on the surface of the slope 7b. That is, when the frictional resistance of the inclined surface 7b is large, the radiating fin 3 is formed thick, and when the frictional resistance is small, it is formed thin. Therefore, in order to make the radiating fin 3 have a desired plate thickness, it is necessary to make the frictional resistance of the digging tool 7 constant. Moreover, it becomes possible to control the plate | board thickness of the radiation fin 3 by changing frictional resistance.

  FIG. 9 shows a second embodiment of the present invention, and shows a method of further increasing the surface area of the radiating fin formed on the radiator. The digging tool 10 used in the second embodiment is substantially the same as the digging tool 7 used in the first embodiment except that the digging tool 10 used in the second embodiment is perpendicular to the moving direction at the bottom end. That is, a plurality of concave portions 11 are formed in the blade portion 10a. The excavating tool 10 is formed with two inclined surfaces 10b and 10c inclined at a predetermined angle from the blade portion 10a, and a step portion 10d is formed between the two inclined surfaces 10b and 10c. In the same manner as the digging tool 7 shown in the first embodiment, the taper surfaces parallel to the moving direction are respectively formed and the taper blade is formed at the tip.

  And the pilot hole 2a which has a function as a positioning and a stopper is drilled in the hoop-like metal plate 2 which is sequentially supplied from the supply device, and is placed on the die for positioning. Thereafter, similarly to the first embodiment described above, the radiating fins 12 are formed upright by digging up the hoop-like metal plate 2 and moving the tool 10. At this time, since the plurality of concave portions 11 are formed in the blade portion 10a of the digging tool 10, the radiating fins 12 are dug up with a delay due to the concave portions 11, so that the radiating fins 12 correspond to the concave portions 11. A plurality of concave grooves 12a having a substantially U-shaped cross section are formed at the position. Since the surface area of the concave groove 12a is larger than the flat area, the surface area of the radiating fin 12 is larger than that of the radiating fin 3 described above, so that the radiating efficiency as a radiator is further improved.

  In addition, the shape of the recessed groove 12a can be variously changed by changing the shape of the some recessed part 11 formed in the blade part 10a to another shape. Further, by forming the recess 11 further deeply, a stepped fin-like fin can be formed on the upstream side of the normal radiating fin 12 formed by the blade portion 10a. At this time, in order to make the height of the tongue-like fins equal to the height of the normal radiating fins 12, a jetty having a height substantially equal to the depth of the recess 11 can be formed on the bottom surface of the digging tool 10. desirable.

  FIG. 10 shows a third embodiment of the present invention, and shows a method of manufacturing a radiator in which a plurality of radiating fins are formed upright at the same time on a hoop-shaped metal plate 2. The digging tool 20 used in the third embodiment is substantially the same as the digging tool 7 used in the first embodiment, but the difference is that as shown in FIG. A pair of blade portions 22 and 23 are formed by forming a split groove 21 having a deep depth at the center of the blade portion perpendicular to the moving direction at the tip and dividing the blade portion into two. Further, the digging tool 20 is formed with two inclined surfaces 22a, 22b and 23a, 23b inclined by a predetermined angle from the respective blade portions 22, 23, and a step portion between these two inclined surfaces 22a, 22b and 23a, 23b. 22c and 23c are formed, and tapered surfaces parallel to the moving direction are formed on both sides of the bottom surfaces of the blade portions 22 and 23, respectively, and a tapered blade is formed at the tip.

  And the pilot hole 2a which has a function as a positioning and a stopper is drilled in the hoop-shaped metal plate 2 which is sequentially supplied from the supply device, and is placed on the die 5 for positioning. Thereafter, similarly to the first embodiment described above, the pair of left and right radiating fins 24 and 25 are erected simultaneously by moving the digging tool 20 to dig up the hoop-like metal plate 2. Further, a split band 26 corresponding to the split groove 21 of the digging tool 20 is formed between the pair of left and right radiating fins 24, 25.

  Further, in order to erect the next heat dissipating fin, the hoop-shaped metal plate 2 is sent to the downstream side and positioned by a pilot pin provided on the die 5, and then the blade portions 22, 23 of the digging tool 20 as described above. Are brought into contact with the upstream side of the pair of left and right processed surfaces 27 and 28 formed by the pair of left and right radiating fins 24 and 25 formed upright first, and the digging tool 20 is moved to move to the next pair of left and right workpieces. The heat radiation fins 24 and 25 are formed upright. Thereafter, by repeating this upright formation process, a plurality of radiating fins 24 and 25 are continuously formed on the hoop-shaped metal plate 2 at a predetermined pitch. After the plurality of radiating fins 24 and 25 are formed in this way, as described in FIG. 6, the radiator having the two radiating fins 24 and 25 is formed by cutting at the position of the cut line CT. Manufactured.

  In the above-described third embodiment of the present invention, the two radiating fins 24 and 25 are formed in one radiator, but three or more divided grooves 21 are formed in the digging tool 20 and the blade portion is formed. By forming three or more parts, it is possible to simultaneously erectly form a plurality of radiating fins in three or more rows on the hoop-shaped metal plate 2. Further, as described above, two heat dissipating fins may be formed on one heat radiator, but by manufacturing the two heat radiators at the same time by cutting the dividing band 26. Anyway. In the case where three or more rows of radiating fins are erected, all the divided bands are cut, and even if three or more radiators are manufactured at the same time, or cut at a predetermined divided band, Two or more radiators may be manufactured, and the number of rows of radiating fins standing up on the hoop-like metal plate 2 or the number of divisions can be appropriately set.

  FIG. 11 shows a modification of the positioning means for the hoop-shaped metal plate 2 that can be applied in each of the above-described embodiments. For example, in the positioning means in the first embodiment described above, the pilot holes 2a are formed at the formation pitch of the radiation fins 3 by a pressing device (not shown), and the pilot holes 2a are fitted to the pilot pins 6 provided in the die 5. Positioning. When reducing the formation pitch of the radiating fins 3, it is necessary to reduce the interval between the pilot holes 2a. However, since pressure is applied to the pilot holes 2a when the hoop-like metal plate 2 is dug up and raised by the tool 7 to erect the radiation fins 3, there is a limit to reducing the interval between the pilot holes 2a. Therefore, the positioning means shown in FIG. 11 forms notches 30 on both sides of the hoop-like metal plate 2 every time the radiating fins 3 are erected, and the die 5 is provided with a pilot table 31, and the notches By abutting 30, the hoop-shaped metal plate 2 is positioned and the pressure at the time of digging is received. According to this positioning means, since the notch 30 can be formed in an arbitrary dimension, the formation pitch of the radiation fins 3 can be reduced. Moreover, since the space | interval of the notch part 30 can be set arbitrarily, it becomes possible to form the radiation fin 3 by arbitrary pitches.

  FIG. 12 shows a fourth embodiment of a radiator having a radiation fin curved in a substantially cylindrical shape. In the excavating tool 40 used in the fourth embodiment, an inclined surface 40b inclined by a predetermined angle is formed from a blade portion 40a perpendicular to the moving direction formed at the tip on the bottom surface side, and is relatively close to the inclined surface 40b. In addition, a slope 40 c that is substantially perpendicular to the bottom surface of the digging tool 40 is formed. In addition, it is the same as the digging tool 7 shown in the first embodiment that tapered surfaces parallel to the moving direction are formed on both sides on the bottom surface side, and a tapered blade is formed at the tip.

  Then, the radiating fins 41 are erected by moving the digging tool 40 and digging up the positioned hoop-shaped metal plate 2. Initially, the blade 40a of the digging tool 40 is digged up, but when the height of the radiating fin 41 is increased, the tip abuts against the inclined surface 40c, the direction is changed and curved, and the digging tool 40 advances as the digging up proceeds. A substantially cylindrical radiating fin 41 is formed upright. After the radiating fins 41 are thus formed, the hoop-shaped metal plate 2 is fed at a predetermined pitch, and the blade portion 40a of the digging tool 40 is made to be more than the work surface 42 formed by the radiating fins 41 formed upright earlier. While making it contact | abut to an upstream, the digging tool 40 is moved and the following substantially cylindrical radiation fin 41 is formed upright. Thereafter, by repeating this standing formation process, a plurality of heat radiation fins 41 are continuously formed on the hoop-shaped metal plate 2 at a predetermined pitch. After the plurality of heat dissipating fins 41 are thus formed, as described in FIG. 6, the heat radiator is manufactured by cutting at the position of the cut line CT.

  Thus, by forming the radiation fins 41 in a substantially cylindrical shape, the height dimension H of the radiator is suppressed, and a thin radiator can be manufactured. However, even if it is thin, the radiation fin 41 has the same total length and the same heat radiation area, so that there is no change in the heat radiation efficiency. On the contrary, when cooling with a fan from the side of the substantially cylindrical radiating fin 41, the flow path of the cooling air is regulated by the cylinder, so that the cooling efficiency can be increased.

  FIG. 13 shows a fifth embodiment of a radiator having radiation fins standing upright substantially perpendicular to the hoop-like metal plate 2. As the digging tool in the fifth embodiment, the digging tool 7 shown in the first embodiment, the digging tool 40 shown in the fourth embodiment, or the like is used. In FIG. 12, it demonstrates as using the digging tool 40 etc. FIG. When the digging tool 40 is moved to dig up the hoop-shaped metal plate 2, the regulating member 50 is digged up and installed in the vicinity of the tool 40. As described above, the radiating fins 51 are erected by moving the digging tool 40 and digging up the positioned hoop-like metal plate 2. When the radiating fins 51 are increased in height, The tip of 51 is brought into contact with the regulating member 50 and is changed in a direction substantially perpendicular to the hoop-shaped metal plate 2. Thereafter, as the height further increases, the tips of the radiation fins 51 rise along the regulating member 50, and when the digging tool 40 is moved to a predetermined position, the radiation fins are formed so as to stand substantially vertically.

  The regulating member 50 is installed by being lowered from above each time before the radiating fin 51 is erected by the digging tool 40. By narrowing the gap between the restricting member 50 and the digging tool 40, the radiating fin 51 formed upright can be curved by the gap, and the substantially flat radiating fin 51 can be formed.

  FIG. 14 shows a sixth embodiment of a radiator in which a substantially eight-letter radiating fin is erected on the hoop-shaped metal plate 2. In the excavating tool 60 in the sixth embodiment, two side blade portions 60a and 60b inclined with respect to the moving direction are formed at the tip on the bottom surface side. From these blade parts 60a and 60b, inclined surfaces 60c and 60d inclined by a predetermined angle toward the upper surface side are formed. The digging tool 60 configured in this manner is inclined at an angle of approximately 5 degrees to 20 degrees so that the rear end side becomes higher with respect to the hoop-like metal plate 2, as in the above-described embodiments. It is attached to a drive device (not shown).

  After the digging tool 60 is brought into contact with one surface of the hoop-shaped metal plate 2, it is moved toward the other surface of the hoop-shaped metal plate 2 at a predetermined angle by the driving device. Then, as shown in FIG. 14, the hoop-like metal plate 2 is dug up by the two blade portions 60a and 60b formed at the tip of the digging tool 60, and two sides having the same angle as the angles of the blade portions 60a and 60b. Thin radiating fins 61 and 62 are formed upright. Since the radiating fins 61 and 62 have different digging directions by the two blade portions 60a and 60b, the centers of the two radiating fins 61 and 62 are separated when the hoop-shaped metal plate 2 is dug up at this angle. Thus, the substantially eight-shaped radiating fins 61 and 62 are formed upright. Then, on the traces where the heat radiation fins 61 and 62 on the two sides are formed, processed surfaces 63 and 64 each having a slope that becomes deeper toward the center are formed.

  Next, in order to form the next heat radiation fins 61 and 62 on the upstream side of the previously formed heat radiation fins 61 and 62, the hoop-shaped metal plate 2 is sent to the downstream side and fixed. Thereafter, the digging tool 60 is moved to bring the blade portions 60a and 60b into contact with the upstream side of the work surfaces 63 and 64, and the digging tool 60 is moved to form the two side radiating fins 61 and 62 upright. To do. Thereafter, by repeating this standing-up formation process, a plurality of two-sided radiation fins 61 and 62 are continuously formed on the hoop-shaped metal plate 2 at a predetermined pitch.

  Thus, even if the two blade portions 60a and 60b are formed on the digging tool 60, the hoop-like metal plate 2 can be digged up and the heat radiation fins 61 and 62 can be formed upright. Therefore, in order to dig up the hoop-like metal plate 2 and form the radiating fins upright, it is only necessary to form two or more blade portions on the digging tool. In addition, a two-sided blade portion projecting in a triangular shape is formed in the central portion of the digging tool 7 used in the first embodiment described above, and the two blade portions on both sides and the two surfaces of the central portion are formed. It is also possible to dig up the hoop-like metal plate 2 with up to four blade portions in total with the blade portions to erect heat radiation fins. Furthermore, by forming a plurality of triangularly projecting blade portions at the tip of the digging tool and digging up the hoop-like metal plate 2, a substantially saw-like radiating fin can be formed upright. This digging tool In this case, four or more blade portions are formed.

  In each of the embodiments described above, the radiating fins are formed upright by moving the digging tool while the hoop-shaped metal plate is positioned and fixed. On the contrary, the digging tool is fixed and the hoop-shaped metal plate is fixed. The heat dissipating fins may be formed by moving the plate, and the heat dissipating fins can be formed upright by relatively moving the hoop-like metal plate and the digging tool. Further, a flat radiator is manufactured by cutting a hoop-shaped metal plate on which a plurality of radiating fins are erected. However, according to the method of manufacturing a radiator according to the present invention, a large number of radiating fins are erected. For example, a cylindrical radiator can be manufactured by curling the formed long radiator. Furthermore, it is also possible to manufacture a polygonal tubular radiator by bending a long radiator with a predetermined dimension. Furthermore, when the surface of a device requiring heat radiation is a curved surface, a heat radiator having the same curved surface as this curved surface may be manufactured and joined to the device. It can be transformed into a shape. On the other hand, the example in which the same radiating fins are continuously formed upright on the hoop-shaped metal plate is shown. However, after the radiating fins having a certain shape or pitch are erected, the radiating fins having other shapes or pitches are erected. By doing so, you may make it manufacture a various heat radiator continuously. Furthermore, the hoop-like metal plate is a strip-like metal plate, and the length of the hoop-like metal plate does not matter as long as it is a metal plate having a length for producing several radiators from the metal plate. . Thus, the present invention is not limited to these examples and can be variously modified without departing from the present invention.

  The present invention can be applied to a radiator such as a radiator or a heat sink that cools an electronic component such as a semiconductor integrated circuit, and a radiator that radiates heat generated from a heating element.

It is a perspective view which shows the manufacturing method of the heat radiator by the 1st Example concerning this invention. It is sectional drawing which shows the heat radiator concerning this invention. (A) thru | or (D) is explanatory drawing which shows the radiation fin formation process of the heat radiator concerning this invention. It is a top view which shows the radiation fin formation process of the heat radiator concerning this invention. (A) thru | or (C) is explanatory drawing which shows the state which looked at the radiation fin formation process of the heat radiator concerning this invention from the cross section. It is a perspective view which shows the state which formed continuously the radiation fin of the heat radiator concerning this invention. It is a perspective view which shows the heat radiator concerning this invention. (A) thru | or (C) are sectional drawings which show the front-end | tip shape of the digging tool concerning this invention. It is a perspective view which shows the manufacturing method of the heat radiator by the 2nd Example concerning this invention. It is a perspective view which shows the manufacturing method of the heat radiator by the 3rd Example concerning this invention. It is a top view which shows the modification of the positioning means in the manufacturing method of the heat radiator concerning this invention. It is sectional drawing which shows the radiation fin formation process of the heat radiator by the 4th Example concerning this invention. It is sectional drawing which shows the radiation fin formation process of the heat radiator by the 5th Example concerning this invention. It is a top view which shows the radiation fin formation process of the heat radiator by the 6th Example concerning this invention. It is a perspective view which shows the radiation fin formation process of the conventional radiator.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Radiator 2 Hoop-shaped metal plate 2a Pilot hole 2b Processed surface 3 Radiation fin 4 Recess 5 Die 6 Pilot pin 7 Digging tool 7a Blade part 7b, 7c Slope 7d Step part 7e Tapered surface 7f Taper blade 60 Digging tool 60a, 60b Two-sided blade portions 61, 62 Two-sided radiation fins 63, 64 Work surface CT Cut line

Claims (6)

A method of manufacturing a radiator in which a thin plate-like heat radiation fin is integrally formed on a metal plate,
A hoop-shaped metal plate such as aluminum or copper with good thermal conductivity, and a digging tool having blade portions formed on at least two surfaces on the tip side in the moving direction,
Blade portions formed on at least two surfaces of the digging tool by relatively moving the hoop-shaped metal plate and the digging tool in a state having a predetermined angle between the hoop-shaped metal plate and the digging tool. By digging up the hoop-like metal plate, the plate-like heat radiation fin is integrally formed upright,
The hoop-like metal plate and the digging tool are relatively moved from the upstream side of the forming pitch with respect to the work surface formed by the standing formation of the radiation fins, and the hoop-like metal plate is dug up by the digging tool. The next plate-shaped heat dissipating fin is integrally formed upright by the above, and then the plurality of heat dissipating fins are continuously formed on the hoop-shaped metal plate by sequentially repeating the digging process thereafter. Method. The digging tool is formed with a blade portion perpendicular to the moving direction at the tip on the bottom surface side, tapered surfaces parallel to the moving direction on both sides on the bottom surface side, and formed at the tips of the tapered surfaces on both sides. The method of manufacturing a radiator according to claim 1, wherein a side surface of the radiating fin is cut by a tapered blade, and the radiating fin is formed upright by a blade portion at a tip. The digging tool has two inclined surfaces formed at a predetermined angle with respect to the bottom surface, and the two inclined surfaces are separated by a step portion formed in the vicinity of the blade portion, and are continuous with the blade portion. 3. The radiator according to claim 1, wherein the other slope is formed higher than the one slope, and the radiating fin dug up by the blade portion is curled by a corner portion of the other slope and the step portion. Production method. The digging tool is formed with two blade portions that are inclined with respect to the moving direction. The two blade portions are dug down toward the inside of the hoop-like metal plate, and two blades that are substantially parallel to the two blade portions are formed. The method for manufacturing a radiator according to claim 1, wherein the plate-shaped heat radiation fins are integrally formed upright. The said hoop-shaped metal plate in which the said several radiation fin was formed continuously forms a heat sink by cut | disconnecting between the said radiation fins adjacent for every predetermined number of said radiation fins. Method of manufacturing a radiator. A heat radiator in which a thin plate-like heat radiation fin is integrally formed on a metal plate, and this heat radiator digs up one side of a hoop-like metal plate made of aluminum, copper or the like having good thermal conductivity and repeatedly digs it up with a tool. A plurality of radiating fins standing upright are integrally formed at a predetermined pitch, and a recess is formed between the radiating fins by digging up with the digging tool, and the thickness of the recess is set to the thickness of the hoop-like metal. A heat radiator characterized by being formed smaller than the plate thickness.

Images