JP7559508B2 - Manufacturing method for cooler parts, manufacturing method for cooler case - Google Patents

Description

The present invention relates to a method for manufacturing cooler parts and a method for manufacturing cooler cases.

For example, the heat sink described in Patent Document 1 has a base plate that is rectangular in plan view, and the entire outer periphery of the base plate is configured as a flange portion, while the inner periphery excluding the flange portion is configured as a pin forming region. Furthermore, a large number of pin fins are integrally formed in the pin forming region on the surface side of the base plate. The heat sink described in Patent Document 1 is formed by forging.

JP 2019-104027 A

Forging is a processing method in which material is pressurized and plastically flows in a die to form it, so strong pressure is required during processing. Therefore, the die of the forging device needs to be strong enough to withstand the strong pressure, which makes the device larger, and the forging cost more expensive. As a result, if parts manufactured by forging are used as cooler parts, the cooler will be expensive.
An object of the present invention is to provide a method for manufacturing a cooler component that can be manufactured at low cost.

The present invention, which was completed with this objective in mind, is a manufacturing method for a cooler part, in which a first surface of a flat plate-shaped material is supported by a first mold, and a second surface opposite the first surface is pressed by a second mold in a direction perpendicular to the second surface, thereby forming a plurality of convex portions protruding from the first surface, and processing the portion on the second surface side flat so as to remove any traces of the pressure applied by the second mold.
Here, a side wall surrounding the periphery of the plurality of protrusions may be formed by applying pressure to the outer periphery of the plurality of protrusions from the second surface side.
Moreover, a flange protruding outward beyond the side wall may be formed by applying pressure from the second surface side.
The tip end surface of the protrusion may be formed to be flush with the end surface of the side wall and the end surface of the flange.
From another perspective, the present invention is a method for manufacturing a cooler case, in which two parts manufactured by the above-mentioned method for manufacturing cooler parts are arranged so that the tip surfaces of the convex portions and the flanges face each other, and the flanges are joined together.
Here, the flanges may be joined together by laser welding.

The present invention provides a method for manufacturing cooling components that can be manufactured at low cost.

FIG. 1 is a diagram illustrating an example of an external appearance of a cooling device according to an embodiment. FIG. 2 is an example of an exploded view of components constituting the cooling device according to the embodiment. FIG. 2 is a diagram illustrating an example of a cross section of a cooling device according to an embodiment. 4A is a diagram showing an example of a plane of a first member of a first cooler, and FIG. 4B is a diagram showing an example of a cross section taken along line IVb-IVb of FIG. 4 is an enlarged view of a joint portion between a first member of the first cooler and a connecting member. FIG. 6A and 6B are diagrams for explaining joining of a first member and a second member of the first cooler. 1A to 1C are diagrams illustrating an example of a process for manufacturing a first member.

Hereinafter, embodiments will be described in detail with reference to the accompanying drawings.
FIG. 1 is a diagram showing an example of the appearance of a cooling device 1 according to an embodiment.
FIG. 2 is an example of an exploded view of components constituting the cooling device 1. As shown in FIG.
3 is a diagram showing an example of a cross section of the cooling device 1. Fig. 3 is a cross-sectional view taken along line III-III of Fig. 1.
Fig. 4(a) is a diagram showing an example of a plane of the first member 11 of the first cooler 10. Fig. 4(b) is a diagram showing an example of a cross section taken along line IVb-IVb of Fig. 4(a).
The cooling device 1 according to the embodiment includes a first cooler 10, a second cooler 20, and a third cooler 30, which are coolers capable of circulating a refrigerant therethrough. The cooling device 1 also includes a connecting member 40 arranged between the first cooler 10 and the third cooler 30, and a connecting member 50 arranged between the first cooler 10 and the second cooler 20. The cooling device 1 also includes a support member 60 that supports the first cooler 10, the second cooler 20, and the third cooler 30. The cooling device 1 also includes a pressing member 70 that presses the heat generating body 100 arranged between the first cooler 10 and the second cooler 20 so that the surfaces of the first cooler 10 and the second cooler 20 come into contact with the heat generating body 100 arranged between the first cooler 10 and the third cooler 30, and so that the surfaces of the first cooler 10 and the third cooler 30 come into contact with the heat generating body 100 arranged between the first cooler 10 and the third cooler 30. The cooling device 1 also includes a connecting member 80 disposed between the third cooler 30 and the pressing member 70 .

1 and 2 , the cooling device 1 is a stacked type cooling device in which a first cooler 10, a second cooler 20, and a third cooler 30 are stacked. Hereinafter, the direction in which the first cooler 10, the second cooler 20, and the third cooler 30 are stacked may be referred to as the "vertical direction."
The materials of the first cooler 10, the second cooler 20, the third cooler 30, the connecting member 40, the connecting member 50, the support member 60, and the connecting member 80 can be, for example, aluminum materials such as aluminum or an aluminum alloy, or copper.
The heating element 100 can be exemplified as a card-type power module.

(First Cooler 10)
The first cooler 10 has a case 13 in which a first member 11 having a concave shape and a plurality of convex portions 11b protruding from a bottom surface 11a and a second member 12 having a concave shape and a plurality of convex portions 12b protruding from a bottom surface 12a are joined so that the tips of the convex portions 11b and the tips of the convex portions 12b face each other. The case 13 is a member having a roughly rectangular parallelepiped shape, and a space S1 through which a refrigerant flows is formed inside. In the following description, the longitudinal direction of the case 13 may be simply referred to as the "longitudinal direction", and the lateral direction of the case 13 may be simply referred to as the "lateral direction". The convex portions 11b and 12b may be, for example, cylindrical or rectangular columnar. Alternatively, the convex portions 11b and 12b may be, for example, flat plates extending in the longitudinal direction. Furthermore, when the protrusions 11b and 12b are flat, they may be parallel to the longitudinal direction, or may be wavy having portions inclined in the longitudinal direction.

The first member 11 has a first communication hole 11c at one end of the bottom surface 11a in the longitudinal direction, which communicates the space S1 with the outside of the case 13, and a second communication hole 11d at the other end of the bottom surface 11a in the longitudinal direction, which communicates the space S1 with the outside of the case 13. The first communication hole 11c is a long hole whose longitudinal direction is the short side direction of the first member 11 and whose longitudinal direction is the short side direction of the first member 11. The second communication hole 11d can be exemplified as having the same shape as the first communication hole 11c. The first member 11 also has a side wall 11e extending from the outer periphery of the bottom surface 11a in a direction perpendicular to the bottom surface 11a, and a flange 11f protruding outward from the tip of the side wall 11e in a direction parallel to the bottom surface 11a. The bottom surface 11a and the side wall 11e form a recess, and a flange 11f is formed around the periphery of this recess.

In addition, the multiple protrusions 11b provided on the first member 11 are divided into three regions, the first region 11g, the second region 11h, and the third region 11j, in the longitudinal direction. Then, between the first region 11g and the second region 11h, multiple protrusions 11k (two in this embodiment) protruding from the bottom surface 11a are provided in the short direction, and between the second region 11h and the third region 11j, multiple protrusions 11m (two in this embodiment) protruding from the bottom surface 11a are provided in the short direction. These multiple protrusions 11b, multiple protrusions 11k, and multiple protrusions 11m are provided on the recess side, in other words, on the space S1 side of the case 13. On the other hand, on the opposite side of the recess in the first member 11, in other words, on the outer surface side of the case 13, the area where the multiple protrusions 11b are provided forms a flat outer surface 11p. On the other hand, in the area where the multiple protrusions 11k and multiple protrusions 11m are provided, a recess 11r is provided that is recessed from the outer surface 11p. In other words, the area where the protrusions 11k and protrusions 11m are provided is recessed from the outer surface 11p to form the recess 11r so that the thickness is the same as the thickness between the bottom surface 11a and the outer surface 11p. However, the thickness around the recess 11r does not have to be the same as the thickness between the bottom surface 11a and the outer surface 11p.

The tips of the flange 11f, the projection 11k, and the projection 11m are molded to be on the same plane. In addition, the first outer surface 11s, which is the outer surface 11p corresponding to the first region 11g, the second outer surface 11t, which is the outer surface 11p corresponding to the second region 11h, and the third outer surface 11u, which is the outer surface 11p corresponding to the third region 11j, are surfaces that come into contact with the heating element 100, and are all formed to have the same area. In addition, multiple recesses 11r (two in this embodiment) are provided in the short direction between the first outer surface 11s and the second outer surface 11t. In addition, multiple recesses 11r (two in this embodiment) are provided in the short direction between the second outer surface 11t and the third outer surface 11u.

The multiple protrusions 11b are provided in a first region 11g, a second region 11h, and a third region 11j as an example of a first portion where the heating element 100 is disposed so as to be in contact with the first member 11, a surrounding region 11v as an example of a second portion around the first communication hole 11c, and a surrounding region 11w as an example of a second portion around the second communication hole 11d. The multiple protrusions 11b are not provided between the surrounding region 11v and the first region 11g, and between the surrounding region 11w and the third region 11j.
The side wall 11e does not have to extend from the outer periphery of the bottom surface 11a in a direction perpendicular to the bottom surface 11a, and may extend in a direction inclined with respect to the perpendicular direction.

The second member 12 can be exemplified as having the same shape as the first member 11. That is, the second member 12 has a first communication hole (not shown) at one end of the bottom surface 12a in the longitudinal direction, which communicates the space S1 with the outside of the case 13, and a second communication hole (not shown) at the other end of the bottom surface 12a in the longitudinal direction, which communicates the space S1 with the outside of the case 13. The second member 12 also has a side wall 12e extending from the outer periphery of the bottom surface 12a in a direction perpendicular to the bottom surface 12a, and a flange 12f protruding outward from the tip of the side wall 12e in a direction parallel to the bottom surface 12a. A recess is formed by the bottom surface 12a and the side wall 12e, and a flange 12f is formed around this recess.

The multiple protrusions 12b provided on the second member 12 are divided into three regions in the longitudinal direction: a first region (not shown), a second region (not shown), and a third region (not shown). Between the first region (not shown) and the second region (not shown), multiple protrusions (not shown) protruding from the bottom surface 12a are provided in the short direction (two in this embodiment), and between the second region (not shown) and the third region (not shown), multiple protrusions (not shown) protruding from the bottom surface 12a are provided in the short direction (two in this embodiment). These multiple protrusions 12b and multiple protrusions are provided on the recess side, in other words, on the space S1 side of the case 13. On the other hand, on the opposite side of the recess in the second member 12, in other words, on the outer surface side of the case 13, the portion where the multiple protrusions 12b are provided forms the outer surface 12p. On the other hand, the portion where the multiple protrusions are provided has a recess (not shown) recessed from the outer surface 12p. In other words, the area where the protrusion is provided is recessed from the outer surface 12p to form a recess so that the thickness is the same as the thickness between the bottom surface 12a and the outer surface 12p. However, the thickness around the recess does not have to be the same as the thickness between the bottom surface 12a and the outer surface 12p.

The flange 12f and the tips of the projections are molded to be on the same plane. In addition, the first outer surface (not shown), which is the outer surface 12p corresponding to the first region, the second outer surface (not shown), which is the outer surface 12p corresponding to the second region, and the third outer surface (not shown), which is the outer surface 12p corresponding to the third region, are surfaces that come into contact with the heating element 100, and are all formed to have the same area. In addition, multiple recesses (two in this embodiment) are provided in the short direction between the first and second outer surfaces. In addition, multiple recesses (two in this embodiment) are provided in the short direction between the second and third outer surfaces.

Since the first member 11 and the second member 12 have the same shape, it is possible to reduce the number of types of parts that make up the cooling device 1.

The first member 11 and the second member 12 are joined by laser welding in a state in which the flanges 11f and 12f, the tips of the multiple convex portions 11b and 12b, the tips of the projections 11k and 11m (not shown) are in contact with each other. This joining method will be described in detail later.

The first cooler 10 is disposed such that the first member 11 is on the pressing member 70 side and the second member 12 is on the supporting member 60 side.
The first communication hole formed in the second member 12 functions as an inlet for allowing the refrigerant to flow into the space S1, and the second communication hole formed in the second member 12 functions as an outlet for allowing the refrigerant to flow out of the space S1.

(Second Cooler 20)
The second cooler 20 has a case 23 in which a first member 21 having a concave shape and a plurality of convex portions 21b protruding from a bottom surface 21a and a flat second member 22 covering an opening of the first member 21 are joined so that the tips of the convex portions 21b face the second member 22. The case 23 is a member having a roughly rectangular parallelepiped shape, and a space S2 through which the refrigerant flows is formed inside. The convex portions 21b can be exemplified as a columnar shape such as a cylindrical column or a square column. Alternatively, the convex portions 21b can be exemplified as a flat plate shape extending in the longitudinal direction. In addition, when the convex portions 21b are flat, they may be parallel to the longitudinal direction, or may be wavy with a portion inclined in the longitudinal direction.

The first member 21 has the same shape as the first member 11 of the first cooler 10, and has a first communication hole (not shown), a second communication hole (not shown), a side wall 21e, and a flange 21f, which correspond to the first communication hole 11c, the second communication hole 11d, the side wall 11e, and the flange 11f, respectively. The first member 21 also has a protrusion (not shown), a protrusion (not shown), a recess (not shown), a first outer surface (not shown), a second outer surface (not shown), and a third outer surface (not shown), which correspond to the protrusion 11k, the protrusion 11m, the recess 11r, the first outer surface 11s, the second outer surface 11t, and the third outer surface 11u of the first member 11, respectively.
The second member 22 is a flat member whose outer circumferential shape is the same as that of the flange 21f of the first member 21. The second member 22 has a first communication hole (not shown) formed at a position facing the first communication hole of the first member 21, and a second communication hole formed at a position facing the second communication hole (not shown) of the first member 21.

The first member 21 and the second member 22 are joined by laser welding in a state in which the flange 21f, the tips of the multiple convex portions 21b, and the tips of the multiple protrusions are arranged to be in contact with the second member 22. The laser welding is performed by irradiating the second member 22 with a laser beam from the outside.
The second cooler 20 configured as above is disposed so that the first member 21 is on the pressing member 70 side and the second member 22 is on the supporting member 60 side.
The first communication hole formed in the second member 22 functions as an inlet for allowing the refrigerant to flow into the space S2, and the second communication hole formed in the second member 22 functions as an outlet for allowing the refrigerant to flow out of the space S2.

(Third Cooler 30)
The third cooler 30 has a case 33 in which a first member 31 identical to the first member 21 of the second cooler 20 and a second member 32 corresponding to the second member 22 of the second cooler 20 are joined together. The case 33 is a member having a roughly rectangular parallelepiped shape, and a space S3 through which the refrigerant flows is formed inside. The third cooler 30 is disposed such that the first member 31 is on the support member 60 side and the second member 32 is on the pressing member 70 side.
The first member 31 is formed with a first communication hole that functions as an inlet for allowing the refrigerant to flow into the space S3, and a second communication hole that functions as an outlet for allowing the refrigerant to flow out of the space S3.
On the other hand, the second member 32 does not have any communication holes corresponding to the first and second communication holes of the second member 22 .

(Connecting member 40)
The connecting member 40 is an elliptical cylindrical member whose short axis direction is the longitudinal direction of the case 13 and whose long axis direction is the short side direction of the case 13. A long through hole 41 whose long axis direction is the longitudinal direction and whose short axis direction is the short side direction is formed in the center of the connecting member 40. The through hole 41 has the same shape as the first communication hole 11c of the first member 11 of the first cooler 10. In addition, a groove 42 into which an O-ring 45 is fitted is formed around the through hole 41 on both sides of the connecting member 40. In addition, the connecting member 40 has a protruding portion 43 protruding in a cylindrical shape from one side on each side of the groove 42 in the long axis direction. A cylindrical through hole 44 is formed in the center of the protruding portion 43.
The vertical size of the center of the connecting member 40 is the same as the vertical size of the heating element 100, which is the thickness of the heating element 100. Moreover, the vertical size of the protruding portion 43 of the connecting member 40 is the same as the vertical size of the case 13, which is the thickness of the case 13.

(Connecting member 50)
The connecting member 50 differs from the connecting member 40 in that the vertical size of the protruding portion 53 corresponding to the protruding portion 43 is smaller than the vertical size of the protruding portion 43. That is, the connecting member 50 is an elliptical cylindrical member whose minor axis direction is the longitudinal direction of the case 13 and whose major axis direction is the short axis direction of the case 13. A long through hole 51 whose major axis direction is the longitudinal direction and whose minor axis direction is the short axis direction is formed in the center of the connecting member 50. The through hole 51 has the same shape as the first communication hole 11c of the first member 11 of the first cooler 10. In addition, a groove 52 into which an O-ring 55 is fitted is formed around the through hole 51 on both sides of the connecting member 50. In addition, the connecting member 50 has a protruding portion 53 protruding in a cylindrical shape from one side on each side of the groove 52 in the major axis direction. A cylindrical through hole 54 is formed in the center of the protruding portion 53.
The vertical size of the center of the connecting member 50 is the same as the vertical size of the heating element 100. Moreover, the vertical size of the protruding portion 53 of the connecting member 50 is the same as the vertical size of the case 23, which is the thickness of the case 23.
However, the connecting member 50 may have the same shape as the connecting member 40 .

(Support member 60)
The support member 60 has a first space 61 recessed from the top surface at one end in the longitudinal direction, and a second space 62 recessed from the top surface at the other end in the longitudinal direction. The opening 61a on the top surface side of the first space 61 has the same shape as the first communication hole 11c of the first member 11. The opening 62a on the top surface side of the second space 62 has the same shape as the second communication hole 11d of the first member 11. A groove 61b into which an O-ring 65 is fitted is formed around the opening 61a in the support member 60. A groove 62b into which an O-ring 66 is fitted is formed around the opening 62a in the support member 60. In addition, the support member 60 has female threads 61c formed on both outer sides of the groove 61b in the long axis direction. In addition, the support member 60 has female threads 62c formed on both outer sides of the groove 62b in the long axis direction.

The support member 60 has a communication hole that connects the first space 61 to the outside in a direction perpendicular to the vertical direction (the short direction in Figs. 1 and 2), and a first joint 63 is fitted into the communication hole. The support member 60 also has a communication hole that connects the second space 62 to the outside in a direction perpendicular to the vertical direction, and a second joint 64 is fitted into the communication hole.

(Pressing member 70)
The pressing member 70 includes a plurality of disc springs 71 (three in this embodiment) and a plate 72 that holds the plurality of disc springs 71 .
The disc spring 71 is a member in the form of a conical disk with a hole in the center, and is arranged so that the smaller diameter side faces the plate 72 and the larger diameter side faces the third cooler 30. The disc springs 71 are attached to the plate 72 at positions corresponding to the three heat generating elements 100 arranged between the coolers.
The plate 72 is a flat member and has a holding portion 72a at its center that holds the disc spring 71. The plate 72 also has cover portions 72b at both longitudinal ends of the holding portion 72a that cover the upper surface of the connecting member 80. Two through holes 72c for passing the bolts 90 are formed in each cover portion 72b.
The disc spring 71 may be made of steel, and the plate 72 may be made of steel, iron, aluminum, or copper.

(Connecting member 80)
The connecting member 80 differs from the connecting member 50 in that the through hole 51 and the groove 52 are not formed. In other words, the connecting member 80 is an elliptical cylindrical member whose minor axis direction is the longitudinal direction of the case 13 and whose major axis direction is the short side direction of the case 13. The connecting member 80 also has a cylindrical protrusion 83 protruding from one surface at each of both ends in the major axis direction. A cylindrical through hole 84 is formed in the center of the protrusion 83. The vertical size of the protrusion 83 is the same as the vertical size of the case 33.

In the cooling device 1 configured as described above, the second cooler 20 is disposed on the support member 60, the first cooler 10 is disposed on the second cooler 20, the third cooler 30 is disposed on the first cooler 10, and the pressing member 70 is disposed on the third cooler 30. In addition, a heat generating body 100 as an example of three objects to be cooled is disposed between the second cooler 20 and the first cooler 10. In addition, three heat generating bodies 100 are disposed between the first cooler 10 and the third cooler 30. In addition, two connecting members 50 are disposed between the second cooler 20 and the first cooler 10, two connecting members 40 are disposed between the first cooler 10 and the third cooler 30, and two connecting members 80 are disposed between the third cooler 30 and the pressing member 70. The connecting member 50 disposed between the second cooler 20 and the first cooler 10 is arranged such that the lower surface of the protruding portion 53 contacts the support member 60, and the connecting member 40 disposed between the first cooler 10 and the third cooler 30 is arranged such that the lower surface of the protruding portion 43 contacts the connecting member 50. Moreover, the connecting member 80 disposed between the third cooler 30 and the pressing member 70 is arranged such that the lower surface of the protruding portion 83 contacts the connecting member 40. Then, at both ends in the longitudinal direction, the male threads of the bolts 90 are passed from the upper side of the pressing member 70 through the through holes 72c of the plate 72, the through holes 84 of the connecting member 80, the through holes 44 of the connecting member 40, and the through holes 54 of the connecting member 50, and are tightened into the female threads 61c and 62c formed in the support member 60, so that the first cooler 10, the second cooler 20, the third cooler 30, and the heating element 100 are supported by the support member 60.

(Method of manufacturing the cooling device 1)
The cooling device 1 configured as above is manufactured as follows.
FIG. 5 is an enlarged view of a joining portion between the first member 11 of the first cooler 10 and the connecting member 40. As shown in FIG.
The first member 11 and the connecting member 40 of the first cooler 10 are joined by laser welding. When performing laser welding, the first member 11 is placed on the connecting member 40, and the first member 11 and the connecting member 40 are overlapped so that the through hole 41 and the first communication hole 11c are aligned. Then, the laser head 151 of the laser device 150 irradiates the first member 11 at the overlapping portion with laser light L, and the laser head 151 is moved along the shape of the first communication hole 11c to continuously irradiate the periphery of the first communication hole 11c with the laser light L. The laser source of the laser device 150 is not particularly limited. Examples of the laser source include a YAG laser, a _CO2 laser, a fiber laser, a disk laser, and a semiconductor laser. The irradiation direction of the laser light L may be a direction perpendicular to the bottom surface 11a of the first member 11 at the overlapping portion, or a direction inclined with respect to the perpendicular direction.
Although FIG. 5 shows one end in the longitudinal direction, the first member 11 and the connecting member 40 are similarly joined by laser welding at the other end in the longitudinal direction.

FIG. 6 is a diagram for explaining the joining of the first member 11 and the second member 12 of the first cooler 10. As shown in FIG.
Next, the first member 11 and the second member 12 are overlapped with the flange 11f of the first member 11 and the flange 12f of the second member 12 so that the flange 12f of the second member 12 is placed on the flange 11f of the first member 11. Then, the laser head 151 of the laser device 150 is moved along the shape of the flange 12f while irradiating the laser light L from the outside of the second member 12 toward the flange 12f, thereby continuously irradiating the laser light L. In addition, the laser light L is irradiated in a spot manner from the outside of the second member 12 to the overlapping portion between the protrusion 11k of the first member 11 and the protrusion (not shown) of the second member 12 and the overlapping portion between the protrusion 11m of the first member 11 and the protrusion (not shown) of the second member 12, for example, to the bottom of the recess 12r.
In this manner, the first member 11 and the second member 12 are joined by laser welding.

The first member 21 of the second cooling device 20 and the connecting member 50 are joined by laser welding in a manner similar to that described with reference to Fig. 5. Thereafter, the first member 21 and the second member 22 of the second cooling device 20 are joined by laser welding in a manner similar to that described with reference to Fig. 6.
Furthermore, the second member 32 of the third cooling device 30 and the connecting member 80 are joined by laser welding in a manner similar to that described with reference to Fig. 5. Thereafter, the first member 31 and the second member 32 of the third cooling device 30 are joined by laser welding in a manner similar to that described with reference to Fig. 6.

Then, the second cooler 20 to which the connecting member 50 is joined is placed on the support member 60. In other words, the connecting member 50 to which the second cooler 20 is joined is placed on the support member 60. Then, the first cooler 10 to which the connecting member 40 is joined is placed on the second cooler 20. In other words, the connecting member 40 to which the first cooler 10 is joined is placed on the connecting member 50. At that time, three heat generating elements 100 are placed between the first cooler 10 and the second cooler 20. More specifically, the heat generating element 100 is placed between the first outer surface of the first member 21 of the second cooler 20 and the first outer surface of the second member 12 of the first cooler 10, the heat generating element 100 is placed between the second outer surface of the first member 21 and the second outer surface of the second member 12, and the heat generating element 100 is placed between the third outer surface of the first member 21 and the third outer surface of the second member 12.

Then, the third cooler 30 to which the connecting member 80 is joined is placed on the first cooler 10. In other words, the connecting member 80 to which the third cooler 30 is joined is placed on the connecting member 40. At that time, three heat generating elements 100 are placed between the first cooler 10 and the third cooler 30. More specifically, the heat generating elements 100 are placed between the first outer surface 11s of the first member 11 of the first cooler 10 and the first outer surface of the first member 31 of the third cooler 30, the heat generating elements 100 are placed between the second outer surface 11t of the first member 11 and the second outer surface of the first member 31, and the heat generating elements 100 are placed between the third outer surface 11u of the first member 11 and the third outer surface of the first member 31.

Then, the pressing member 70 is placed on the third cooler 30. In other words, the plate 72 of the pressing member 70 is placed on the connecting member 80. Then, at one end in the longitudinal direction, a bolt 90 is passed through the through hole 72c of the plate 72, the through hole 84 of the connecting member 80, the through hole 44 of the connecting member 40, and the through hole 54 of the connecting member 50 from the upper side of the pressing member 70, and the male screw is tightened to the female screw 61c formed in the support member 60. At the other end in the longitudinal direction, a bolt 90 is passed through the through hole 72c of the plate 72, the through hole 84 of the connecting member 80, the through hole 44 of the connecting member 40, and the through hole 54 of the connecting member 50 from the upper side of the pressing member 70, and the male screw is tightened to the female screw 62c formed in the support member 60.

In the cooling device 1 configured as described above, the refrigerant that flows into the first space 61 from the first joint 63 of the support member 60 flows through the opening 61a and the first communication hole formed at one end of the second member 22 of the second cooler 20 in the longitudinal direction, and then flows into the space S2 between the first member 21 and the second member 22 of the second cooler 20. Then, a part of the refrigerant that flows into the space S2 advances in the longitudinal direction within the space S2, and flows out of the second cooler 20 through the second communication hole formed at the other end of the second member 22 in the longitudinal direction.

A portion of the refrigerant that has flowed into the space S2 flows out of the second cooler 20 through a first communication hole formed at one end of the first member 21 of the second cooler 20 in the longitudinal direction, and flows into the space S1 between the first member 11 and the second member 12 of the first cooler 10 through the through hole 51 of the connecting member 50 and the first communication hole formed at one end of the second member 12 of the first cooler 10 in the longitudinal direction. A portion of the refrigerant that has flowed into the space S1 advances in the longitudinal direction within the space S1, and flows out of the first cooler 10 through a second communication hole formed at the other end of the second member 12 in the longitudinal direction.

A part of the refrigerant that has flowed into the space S1 flows out of the first cooler 10 through the first communication hole 11c formed at one end of the first member 11 of the first cooler 10 in the longitudinal direction, and flows into the space S3 between the first member 31 and the second member 32 of the third cooler 30 through the through hole 41 of the connecting member 40 and the first communication hole formed at one end of the first member 31 of the third cooler 30 in the longitudinal direction. The refrigerant that has flowed into the space S3 then travels in the longitudinal direction within the space S3 and flows out of the third cooler 30 through the second communication hole formed at the other end of the first member 31 in the longitudinal direction.

The refrigerant that has flowed out of the third cooler 30 flows out of the first cooler 10 through the through hole 41 of the connecting member 40, and the second communication hole 11d of the first member 11 of the first cooler 10 and the second communication hole of the second member 12. The refrigerant that has flowed out of the first cooler 10 flows out of the second cooler 20 through the through hole 51 of the connecting member 50, and the second communication hole of the first member 21 of the second cooler 20 and the second communication hole of the second member 22. The refrigerant that has flowed out of the second cooler 20 enters the second space 62 through the opening 62a formed in the support member 60 and flows out of the second joint 64.

In this way, while the refrigerant flows through the space S1 of the first cooler 10 and the space S2 of the second cooler 20, it cools the heat generating body 100 arranged between the first cooler 10 and the second cooler 20. Also, while the refrigerant flows through the space S1 of the first cooler 10 and the space S3 of the third cooler 30, it cools the heat generating body 100 arranged between the first cooler 10 and the third cooler 30.

Furthermore, at one end side of the longitudinal direction, an O-ring 65 fitted into a groove 61b of the support member 60 seals the gap between the support member 60 and the second cooler 20, thereby preventing the refrigerant attempting to flow into the space S2 of the second cooler 20 through the opening 61a of the support member 60 from flowing through this gap to the outside of the cooling device 1.
In addition, the O-ring 55 fitted into the groove 52 of the connecting member 50 seals the gap between the connecting member 50 and the first cooler 10, thereby preventing the refrigerant attempting to flow into the space S1 of the first cooler 10 through the through hole 51 of the connecting member 50 from flowing through this gap to the outside of the cooling device 1.
In addition, the O-ring 45 fitted into the groove 42 of the connecting member 40 seals the gap between the connecting member 40 and the third cooler 30, thereby preventing the refrigerant attempting to flow into the space S3 of the third cooler 30 through the through hole 41 of the connecting member 40 from flowing through this gap to the outside of the cooling device 1.

In addition, at the other end side in the longitudinal direction, an O-ring 45 fitted into the groove 42 of the connecting member 40 seals the gap between the connecting member 40 and the third cooler 30, thereby preventing the refrigerant attempting to flow into the space S1 of the first cooler 10 through the through hole 41 of the connecting member 40 from flowing through this gap to the outside of the cooling device 1.
In addition, the O-ring 55 fitted into the groove 52 of the connecting member 50 seals the gap between the connecting member 50 and the first cooler 10, thereby preventing the refrigerant attempting to flow into the space S2 of the second cooler 20 through the through hole 51 of the connecting member 50 from flowing through this gap to the outside of the cooling device 1.
In addition, the O-ring 66 fitted into the groove 62b of the support member 60 seals the gap between the support member 60 and the second cooler 20, thereby preventing the refrigerant attempting to flow into the second space 62 of the support member 60 through the opening 62a of the support member 60 from flowing through this gap to the outside of the cooling device 1.

As described above, the first cooler 10 has a case 13 in which the first member 11 having a plurality of convex portions 11b protruding from the bottom surface 11a and the second member 12 having a plurality of convex portions 12b protruding from the bottom surface 12a are joined so that the tip of the convex portion 11b faces the tip of the convex portion 12b. In this way, in the first cooler 10, the convex portion 11b protrudes from the bottom surface 11a of the first member 11, and the convex portion 12b protrudes from the bottom surface 12a of the second member 12. Therefore, for example, compared to a configuration in which a convex portion having a size obtained by adding the vertical size of the convex portion 11b and the vertical size of the convex portion 12b protrudes from a member on one side (the first member 11 or the second member 12), the vertical size of the convex portion 11b and the convex portion 12b is smaller. Therefore, the first member 11 and the second member 12 can be formed by progressive press processing using a press die that is configured to arrange multiple processes within a single press die and allow each process to be carried out continuously while the coil-shaped workpiece remains connected.

(Method of manufacturing case 13)
Next, a method for manufacturing the case 13 will be described.
FIG. 7 is a diagram showing an example of a process for manufacturing the first member 11. As shown in FIG.
In this embodiment, the first member 11 is manufactured by performing progressive press working using a press die, and then performing cutting working.
As shown in Figures 7(a) and 7(b), first, in a state where the first surface 201 of the flat plate-shaped material 200 is supported by the first die 310, the second surface 202 opposite to the first surface 201 is pressed by the second die 320 having the columnar protrusions 321 in a direction perpendicular to the second surface 202, thereby forming a plurality of convex portions 203 protruding from the first surface 201. Hereinafter, the process of forming the convex portions 203 may be referred to as the first process. The first surface 201 corresponds to the bottom surface 11a of the first member 11, and the convex portions 203 correspond to the convex portions 11b of the first member 11.

The first die 310 has a support surface 311 that supports the first surface 201 of the material 200, and a recess 312 that is recessed from the support surface 311 and is provided at a position facing the protrusion 321 of the second die 320. The shape of the recess 312 is a base shape for the shape of the protrusion 11b of the first member 11, and can be, for example, a cylindrical shape or a rectangular prism shape. Note that the recess 312 may be a through hole, and a metal mold separate from the first die 310 may be inserted into the through hole to determine the length of the protrusion 11b.
The second die 320 has a base (not shown) and a plurality of protrusions 321 protruding from the base. The protrusions 321 may be, for example, cylindrical or rectangular prism-shaped.

In the first step, the second die 320 is moved toward the first die 310, and the material 200 supported by the first die 310 is pressurized by the protrusions 321. As a result, the part of the material 200 that is pressurized by the protrusions 321 moves toward the recesses 312 of the first die 310, and a protrusion 203 that conforms to the shape of the recesses 312 is formed on the first surface 201 side. Meanwhile, a recess 204 that conforms to the shape of the protrusions 321 of the second die 320 is formed on the second surface 202 side of the material 200.

Next, as shown in FIG. 7(c), the outer periphery of the multiple protrusions 203 is pressurized from the second surface 202 side to form side walls 205 and flanges 206 that surround the protrusions 203. Hereinafter, the process of forming the side walls 205 and flanges 206 may be referred to as the second process.

In the second step, while the first surface 201 of the material 200 after the protrusion 203 is formed is supported by the third die 330, the second surface 202 is pressed by the fourth die 340 from a direction perpendicular to the second surface 202 to form the side wall 205 and the flange 206. The side wall 205 corresponds to the side wall 11e of the first member 11, and the flange 206 corresponds to the flange 11f of the first member 11.

The third die 330 has a base 331 and a protruding portion 332 protruding from the base 331 toward the fourth die 340. A support surface 333 that supports the first surface 201 of the material 200 is formed at the tip of the protruding portion 332.
The third die 330 may be, for example, arranged next to the first die 310 in the feed direction of the material 200 .

The fourth die 340 has a base (not shown) and a first protrusion 341 and a second protrusion 342 protruding from the base toward the third die 330. The first protrusion 341 and the second protrusion 342 are provided so as to face the base 331 provided outside the protrusion 332 of the third die 330.
In addition, the fourth die 340 is arranged next to the second die 320 in the feed direction of the material 200 , and moves toward the third die 330 together with the second die 320 , for example.

In the second step, the fourth die 340 is moved toward the third die 330, and the portion of the material 200 supported by the third die 330 that is outside the protrusion 332 is pressed by the first protrusion 341 and the second protrusion 342 of the fourth die 340. As a result, the portion of the material 200 that is pressed by the first protrusion 341 moves to the gap G1 between the first protrusion 341 and the base 331 of the third die 330, and to the gap G2 between the base 331 of the third die 330 and the second protrusion 342 of the fourth die 340. Then, the side wall 205 is formed by the material 200 that has moved to the gap G1, and the flange 206 is formed by the material 200 that has moved to the gap G2.

Next, as shown in FIG. 7(d), the material 200 after the sidewall 205 and flange 206 have been formed in the second step is subjected to cutting to remove the recess 204 on the second surface 202 side and make it flat. Hereinafter, the step of flattening the second surface 202 side may be referred to as the third step. In other words, the third step is a step of flattening the portion on the second surface 202 side to remove any traces of pressure applied by the second die 320 and the fourth die 340. The surface 207 after being flattened corresponds to the outer surface 11p of the first member 11.

The second member 12 of the case 13 can be manufactured, for example, by a method similar to that used to manufacture the first member 11 .
6, the first member 11 and the second member 12 are joined by laser welding to manufacture the case 13. The first member 11 and the second member 12 may be joined by brazing or soldering, but by joining them by laser welding, the joining can be performed easily and with high accuracy.

In the above-described manufacturing method, the side wall 205 and the flange 206 are formed simultaneously in the second step, but this is not limited to this embodiment. The side wall 205 and the flange 206 may be formed in separate steps.

As described above, the manufacturing method of the first member 11 as an example of a part for the first cooler 10 according to this embodiment is such that, while the first surface 201 of the flat plate-shaped material 200 is supported by the first die 310, the second surface 202 opposite to the first surface 201 is pressed by the second die 320 from a direction perpendicular to the second surface 202 to form a plurality of convex portions 203 protruding from the first surface 201, and the portion on the second surface 202 side is flattened to erase the traces of pressure applied by the second die 320 and the fourth die 340. According to this manufacturing method, it is possible to manufacture the convex portion 11b (convex portion 203) of the first member 11 by performing progressive press processing. Therefore, for example, the press load can be reduced compared to the case where the convex portion 11b is formed by forging, which requires plastic flow (pushing into a die). In addition, when forming the protrusion 11b, the protrusion 11b does not bite into the first die 310, so the first die 310 can have a simple shape. Therefore, according to the above manufacturing method, the cost of the forming die can be reduced compared to when forging is used.

In addition, in the manufacturing method according to the present embodiment, the outer periphery of the plurality of protrusions 203 is pressed from the second surface 202 side to form the side wall 205 surrounding the plurality of protrusions 203. Since the protrusions 203 (protrusions 11b) of the first member 11 can be manufactured by progressive press processing, it is possible to form the side wall 205 in a separate process. This allows the press load in one process to be reduced compared to the case of using forging, which requires forming the protrusions 203 and the side wall 205 in one process. As a result, it is possible to make the press machine smaller compared to the case of using forging, so that it can be manufactured at a low cost. In addition, when using forging, the outer periphery around the plurality of protrusions 203 becomes flat in order to allow excess material due to plastic flow to escape, but the side wall 205 surrounding the plurality of protrusions 203 can be formed by performing progressive press processing.

In addition, in the manufacturing method according to this embodiment, pressure is applied from the second surface 202 side to form the flange 206 that protrudes outward beyond the side wall 205. Since the protruding portion 203 (protruding portion 11b) of the first member 11 can be manufactured by performing progressive press processing, it is possible to form the flange 206 in a separate process. As a result, compared to the case of using forging, which requires forming the protruding portion 203, the side wall 205, and the flange 206 in a single process, the press load in one process can be reduced, allowing the press machine to be made smaller and manufacturing to be inexpensive.

In addition, the manufacturing method of the case 13 for the first cooler 10 according to this embodiment is to arrange the first member 11 and the second member 12, which are an example of two parts manufactured by the manufacturing method described above, so that the tip surfaces 203a of the convex portions 203 (convex portions 11b, 12b) and the flanges 206 (flanges 11f, 12f) face each other, and then join the flanges 206 together. This makes it easier to join the flanges 206 together compared to joining parts other than the flanges 206 together.

The flanges 206 are then joined together by laser welding. This allows laser welding to be performed by moving the laser head 151 in a direction along the surface of the flanges 206 without moving the laser head 151 in the vertical direction, making it easier to perform than moving the laser head 151 in the vertical direction. Also, joining can be performed with high accuracy.

In the second step, it is preferable to mold the side wall 205 so that a surface 205a on the third die 330 side, which is an example of an end surface, and a surface 206a on the third die 330 side, which is an example of an end surface of the flange 206, are flush with each other. This makes it easier to join the first member 11 and the second member 12 together.
In addition, it is preferable to mold the tip surface 203a of the convex portion 203 so as to be flush with the surfaces 205a and 206a which are the end surfaces of the side wall 205 and the flange 206. As a result, the first member 11 and the second member 12 are joined in a state in which the tip surface of the convex portion 11b (convex portion 203) of the first member 11 and the tip surface of the convex portion 12b (convex portion 203) of the second member 12 are in contact with each other, so that the rigidity of the case 13 is increased and deformation of the case 13 in the up-down direction can be suppressed even if the case 13 is pressed down by the pressing member 70.

1...cooling device, 10...first cooler, 11...first member, 12...second member, 13...case, 20...second cooler, 21...first member, 22...second member, 23...case, 30...third cooler, 31...first member, 32...second member, 33...case, 40, 50, 80...connecting member, 60...support member, 70...pressing member, 90...bolt, 100...heat generating element, 150...le Laser device, 151...laser head, 200...material, 201...first surface, 202...second surface, 203...projection, 204...recess, 205...side wall, 206...flange, 207...surface, 310...first type, 312...recess, 320...second type, 321...projection, 330...third type, 331...base, 332...projection, 340...fourth type, 341...first projection, 342...second projection

Claims (6)

While a first surface of a flat plate-shaped material is supported by a first die, a second surface opposite to the first surface is pressed by a second die in a direction perpendicular to the second surface, thereby forming a plurality of protrusions protruding from the first surface;
A method for manufacturing a cooler part , comprising processing the second surface side portion to be flat so as to remove any trace of pressure applied by the second die,
The second mold has a plurality of protrusions,
the first die has a support surface that supports the first surface, and a recess that is recessed from the support surface and is provided at a portion facing the protrusion,
When processing the surface to be flat, a cutting process is performed so as to remove the depressions formed by the plurality of protrusions.
A manufacturing method for cooling parts . The method for manufacturing a cooler component according to claim 1 , further comprising the step of pressurizing an outer periphery of the plurality of protrusions from the second surface side to form a side wall surrounding the plurality of protrusions. The method for manufacturing a cooler part according to claim 2, further comprising the step of applying pressure from the second surface side to form a flange protruding outward beyond the side wall. The method for manufacturing a cooler part according to claim 3, wherein the tip surface of the protrusion is molded so as to be flush with the end surface of the side wall and the end surface of the flange. A method for manufacturing a cooler case, comprising: positioning two components manufactured by the manufacturing method for cooler parts according to claim 4 so that the tip surfaces of the convex portions and the flanges face each other; and joining the flanges together. 6. The method for manufacturing a cooler case as described in claim 5, wherein the laser light is continuously irradiated toward one of the flanges while a laser head is moved along the shape of the one of the flanges, thereby joining the flanges by laser welding.