Fixing structure, fixing method, and fixing device

Abstract

The present invention addresses the problem of providing a fixing structure, a fixing method, and a fixing device that can maintain a high-precision plane and can reduce manufacturing costs. A structure to which a plurality of members including at least a first member are fixed, the structure being characterized in that a first through-hole is provided in the first member, the staked body is inserted into the first through-hole, and a second through-hole is provided in the second member, and both ends of the staked body are staked at the same time. A first through-hole is formed in one end of the first member, a first opening is formed in one plane portion of the first member, a first recess is provided in the one plane portion of the first member so as to surround the first opening, a first head portion of one end of a swaged body to be swaged is accommodated in the first recess, and the one plane portion of the first member and the first head portion are on the same plane.

Description

Technical Field

[0001] The invention relates to a structure having a plurality of components fixed thereto, a method for fixing the plurality of components and a fixing device. Background Art

[0002] In the past, as a method of fixing multiple parts, a riveting structure using rivets or the like is known. The structure fixed by the riveting structure using rivets is a structure in which the heads of both ends of the rivets protrude from the surface of the fixed structure. Sometimes, the protruding rivet heads may have an adverse effect on the structure.

[0003] For example, in a case where the planar portion of the heat sink needs to be brought into close contact with the planar portion of a component to be cooled, if the head of the rivet protrudes from the planar portion of the heat sink, it is impossible to bring the planar portion of the component to be cooled into close contact with the planar portion of the component to be cooled.

[0004] Therefore, a method has been proposed in which a plurality of bosses are formed on one surface of the base of the heat sink, and the bosses are inserted into a plurality of boss holes formed on the heat sink plate and riveted, thereby fixing the base and the heat sink without forming a protrusion on the other surface of the base. (Patent Document 1)

[0005] In addition, a fixing method has been proposed in which, in a riveted structure using rivets, a recess is formed on the surface of the structure so that the head of the rivet does not protrude from the structure, and riveting is performed using a rivet having a dish-shaped head received in the recess, thereby preventing the protrusion from being formed. (Patent Document 2)

[0006] Prior art literature Patent Literature Patent Document 1: Japanese Patent Application Publication No. 2018-77995 Patent Document 2: Japanese Patent Application Publication No. 2009-115314 Summary of the invention

[0007] Technical issues to be solved by the invention

[0008] The fixing method proposed in Patent Document 1 can maintain a flat surface without protrusions, but requires manufacturing a base having a plurality of bosses. Manufacturing a base having these plurality of bosses is not easy and has a problem of high cost.

[0009] Furthermore, the fixing method proposed in Patent Document 2 can also maintain a plane without protrusions, but due to the manufacturing error of the concave portion on the surface of the structure or the dish head, unevenness will be generated in the receiving portion of the dish head, so there is a problem that a high-precision plane cannot be maintained. In addition, the manufacturing of the rivet with a dish head also has the problem of high cost.

[0010] Therefore, an object of the present invention is to provide a fixing structure, a fixing method, and a fixing device that can solve the above-mentioned problems, maintain a high-precision plane, and reduce the manufacturing cost.

[0011] Means for solving technical problems

[0012] In order to solve such a problem, the present invention has the following structure.

[0013] A structure having a plurality of components fixed thereto, wherein the plurality of components include at least a first component, characterized in that: The first component is provided with a first through hole, A rivet body is inserted into the first through hole. A first opening is formed at one end of the first through hole, and the first opening is opened at a flat surface of the first member. A first recess is provided on a plane portion of the first member so as to surround the first opening. The first recess accommodates a first head portion of one end of the rivet body to be riveted. A flat surface portion of the first member is flush with the first head portion.

[0014] Furthermore, the present invention has the following structures.

[0015] A fixing method for fixing multiple components, characterized by comprising the following steps: overlapping the plurality of components in such a manner that the through holes provided on the plurality of components are consistent; inserting a rivet body into the through holes of the plurality of components formed uniformly; and Both ends of the riveted body are riveted simultaneously.

[0016] Furthermore, the present invention has the following structures.

[0017] A fixing device, comprising a punch, a stripper, a die and a die pin, for fixing a plurality of parts, characterized in that: A rivet body is inserted into the through hole penetrating the plurality of components. The punch abuts against one end of the riveting body, The demoulding device abuts against a flat surface of the plurality of components. The die abuts against another planar portion of the plurality of components, The die pin abuts against the other end of the riveted body, The punch, the ejector, the die and / or the die pin are moved in such a way as to simultaneously rivet both ends of the riveted body.

[0018] Effects of the Invention

[0019] The present invention can provide a fixed structure, a fixing method and a fixing device, in which a high-precision plane can be maintained by accommodating the head of a riveted body to be riveted in a recess formed on the surface of the fixed structure, and the manufacturing cost can be reduced by using a riveted body with both ends riveted at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a diagram of a structure 1 according to a first embodiment of the present invention, Figure 1 (a) is a diagram before riveting. Figure 1 (b) is a diagram showing the state after riveting. Figure 2 This is a diagram showing a part of a caulking process of caulking the structure 1 according to the first embodiment of the present invention using the press machine 2 . Figure 3 This is a diagram showing the remaining part of the caulking step of caulking the structure 1 according to the first embodiment of the present invention using the press machine 2 . Figure 4 It is a graph showing the movement of each component of the press machine 2 in the riveting step according to the first embodiment of the present invention. Figure 5 This is a three-dimensional image obtained by cutting the structure 1 according to the first embodiment of the present invention. Figure 6 This is a three-dimensional image of another example of cutting the structure 1 according to the first embodiment of the present invention. Figure 7 is a diagram of a structure 3 according to a second embodiment of the present invention, Figure 7 (a) is a diagram before riveting. Figure 7 (b) is a diagram showing the state after riveting. Figure 8 This is a diagram showing a part of a caulking step of caulking the structure 3 according to the second embodiment of the present invention using a punch machine 2 ′. Fig. 9 is a diagram of a structure 4 of a second variation of the present invention, Fig. 9 (a) is a diagram before riveting. Fig. 9 (b) is a diagram showing the state after riveting. DETAILED DESCRIPTION

[0021] Hereinafter, a structure 1 according to an embodiment of the present invention will be described with reference to the drawings.

[0022] In the following description, the same symbols in different drawings represent parts with the same functions, and repeated descriptions in the drawings will be appropriately omitted.

[0023] [Implementation Method 1]

[0024] Figure 1 is a diagram of a structure 1 according to a first embodiment of the present invention, Figure 1 (a) is a diagram before riveting. Figure 1 (b) is a diagram showing the state after riveting.

[0025] [Structure of each component]

[0026] The structure 1 of the first embodiment is composed of three metal members: a base member 11 (first member), a U-shaped member 12 (second member), and a rod 13 (caulking body).

[0027] The structure 1 is a heat sink, and the base member 11 is in contact with the surface of a member to be cooled, so that heat is released into the air from the base member 11 and the U-shaped member 12 .

[0028] The base member 11 is a rectangular plate-shaped member formed of aluminum and includes a base 111 and a cylindrical protrusion 112 (protrusion) provided to protrude from the center of one surface 1111 of the base 111 (the other flat surface of the first member).

[0029] A circular through hole 113 (first through hole) is formed on the base member 11, which is concentric with the protrusion 112 and through which the rod 13 can be inserted. The protrusion 112 has one opening (second opening) of the through hole 113, and the other surface 1112 (one flat surface of the first member) of the base 111 of the base member 11 has another opening (first opening) of the through hole 113. A circular recess 114 (first recess) is formed around the other opening of the through hole 113, which is concentric with the through hole 113 and has a larger diameter than the through hole 113. As described later, the recess 114 is formed as a countersink for accommodating the head 1311 (first head) of the lower end portion 131 formed when the rod 13 is rivet, and its radius and depth are designed to accommodate the head 1311 of the lower end portion 131 without more or less.

[0030] The U-shaped member 12 is a member formed of aluminum, a rectangular plate material is bent in a U-shaped cross section, and includes a base 121 and a bent portion 122 (standing portion). The bent portion 122 is not limited to a shape bent at a right angle, but may also be a curved surface.

[0031] A circular ring-shaped fitting hole 123 (fitting portion) that can fit with the protrusion 112 of the base member 11 is formed in the base portion 121 of the U-shaped member 12. The height of the fitting hole 123 is substantially the same as the height of the protrusion 112. The inner diameter of the fitting hole 123 is substantially the same as the outer diameter of the protrusion 112 of the base member 11, and the fitting hole 123 can fit with the protrusion 112 without a gap.

[0032] The rod 13 is a cylindrical shape made of aluminum and is longer than the sum of the length of the through hole 113 and the depth of the recess 114. The diameter of the rod 13 is substantially the same as that of the through hole 113 of the base member 11, and the rod 13 can be inserted into the through hole 113 without any gap.

[0033] [Structure after riveting]

[0034] The fitting hole 123 of the U-shaped member 12 is fitted into the protrusion 112 of the base member 11, the rod 13 is inserted into the through hole 113 of the base member 11, and the rod 13 is pressed from both top and bottom by a punch 2 to rivet. The structure 1 thus obtained is shown in FIG. Figure 1 (b).

[0035] The lower end portion 131 of the rod 13 is caulked and formed so as to be housed in the head portion 1311 of the recessed portion 114 of the base member 11 substantially without a gap.

[0036] The head 1311 and the other surface 1112 of the base member 11 are on the same plane.

[0037] The head portion 1311 and the recessed portion 114 of the base member 11 are brought into contact with each other in a state of being strongly pressed against each other by pressurizing and caulking the rod 13 .

[0038] The upper end portion 132 of the rod 13 is caulked and formed into a substantially truncated cone shape together with the protrusion 112 of the base member 11 and the fitting hole 123 of the U-shaped member 12 .

[0039] The diameter of the substantially truncated cone portion is larger than the original diameter of the through hole 113, and the rod 13 and the head 1311 of the rod 13 do not fall out of the through hole 113. In addition, the substantially truncated cone shape prevents the fitting hole 123 of the U-shaped member 12 from falling out of the protrusion 112 of the base member 11.

[0040] The rod 13, which is riveted by applying pressure from top to bottom, is deformed into a barrel shape that bulges near the center portion in the longitudinal direction (between the approximately truncated cone-shaped portion and the head 1311). The barrel-shaped bulge itself and the tight fit between the circumference of the rod 13 and the inner circumference of the through hole 113 prevent the rod 13 from falling off.

[0041] The three-dimensional image of the cut riveted structure is shown in Figure 5 .

[0042] The base member 11 is not limited to a rectangular shape, and any shape may be selected according to the application.

[0043] The shape of the plate material of the U-shaped member 12 before being bent into the U-shaped cross section is not limited to a rectangular shape, and any shape may be selected according to the application.

[0044] Furthermore, the height of the fitting hole 123 of the U-shaped member 12 does not need to be substantially the same as the height of the protrusion 112 of the base member 11, and may be lower than the height of the protrusion 112, or may be the same as the thickness of the base 121 of the U-shaped member 12. Furthermore, the height of the fitting hole 123 may be slightly higher than the height of the protrusion 112.

[0045] Figure 6 2 shows an example in which the height of the fitting hole 123 is the same as the thickness of the base 121 .

[0046] The base member 11 , the U-shaped member 12 , and the rod 13 may be formed of metals other than aluminum (for example, single metals such as copper and iron), alloys, or the like.

[0047] Furthermore, the base member 11, the U-shaped member 12, and the rod 13 do not need to be formed of the same metal, and one may be formed of a metal different from the other two, or all three may be formed of different metals.

[0048] Furthermore, other members may be disposed between the base member 11 and the U-shaped member 12 .

[0049] [Riveting device (fixing device)]

[0050] use Figure 2 (a) The structure of a press machine 2 of a caulking device for caulking a structure 1 will be described.

[0051] The press machine 2 includes a die 21 abutting against the base member 11 from below, a stripper 22 abutting against the U-shaped member 12 from above, a die pin 23 abutting against the rod 13 from below, and a punch 24 abutting against the rod 13 from above.

[0052] The die 21 is a thick plate-shaped member and has an insertion hole 213 near the center through which the die pin 23 can be inserted.

[0053] Four die hanging bolts 211 are installed on the die 21 .

[0054] The die 21 is configured to be lowered together with the die hanging bolts 211 by a movable mechanism (not shown).

[0055] The die hanging bolt 211 is provided with a die pin washer 231 in a manner that allows vertical sliding. A coil spring 212 is provided concentrically with the die hanging bolt 211 between the die 21 and the die pin washer 231, and the coil spring 212 biases the die 21 and the die pin washer 231 in a direction to separate them.

[0056] The die pin 23 is a rod-shaped member and is provided between the insertion hole 213 provided in the die 21 and the die pin spacer 231. A die damper 232 is arranged around the die pin 23, and the die 21 abuts against the die damper 232 when the die 21 descends a predetermined amount.

[0057] The stripper 22 is a thick plate-like member having an insertion hole 223 near the center through which the punch 24 can be inserted. The stripper 22 also has a protrusion 224 protruding downward from its main body so as to avoid the bent portion 122 of the U-shaped member 12 and abut against the base 121 .

[0058] Four demoulder hanging bolts 221 are installed on the demoulder 22 .

[0059] The stripper 22 is configured to be lowered together with the stripper hanging bolts 221 by a movable mechanism (not shown).

[0060] The punch pad 241 is slidably disposed on the stripper hanging bolt 221. A coil spring 222 is disposed concentrically with the stripper hanging bolt 221 between the stripper 22 and the punch pad 241, and the coil spring 222 biases the stripper 22 and the punch pad 241 in a direction to separate them.

[0061] The punch 24 is a rod-shaped member, and is provided between the insertion hole 223 provided in the stripper 22 and the punch pad 241 .

[0062] The punch 24 is configured to be lowered together with the punch pad 241 by a movable mechanism (not shown).

[0063] A stripper damper 242 is disposed around the punch 24 , and when the punch pad 241 is lowered by a predetermined amount, it comes into contact with the stripper damper 242 .

[0064] [Riveting process (fixing method)]

[0065] Figure 2 , Figure 3 1 is a diagram showing a riveting process for riveting the base member 11, the U-shaped member 12 and the rod 13. Figure 2 (a) Figure 2 (b) Figure 3 (c) Figure 3 (d) Figure 3 (e) in the order in which the

[0066] The caulking process is performed using a press machine 2. In the press machine 2, the rod 13 is caulked by moving the die 21, the stripper 22, and the punch 24.

[0067] (Step a) The fitting hole 123 of the U-shaped member 12 is fitted into the protrusion 112 of the base member 11, and the assembly of the U-shaped member 12 and the base member 11 overlapped is placed on the die 21. Next, the rod 13 is inserted into the through hole 113 of the base member 11, and the lower end 131 of the rod 13 is placed on the die pin 23. Then, the stripper 22 and the punch 24 are moved downward, as shown in FIG. Figure 2 As shown in (a), the protrusion 224 of the stripper 22 abuts against the base 121 of the U-shaped member 12 .

[0068] (Step b) The demoulder 22 stops, and only the punch 24 continues to move downward. Figure 2 As shown in (b), the punch 24 abuts against the upper end portion 132 of the rod 13 .

[0069] (Step c) If the punch 24 moves further downward, Figure 3 As shown in (a), the upper portion of the rod 13 is slightly deformed by caulking. Although the die pin 23 is fixed, the lower end 131 of the rod 13 is relatively pressed against the die pin 23 by the movement of the punch 24, thereby slightly deforming the lower portion of the rod 13 by caulking.

[0070] (Process d) Figure 3 As shown in (d), when the punch pad 241 contacts the stripper damper 242, the stripper 22 resumes its movement, and the stripper 22 moves downward together with the punch 24. At this time, the die 21 also starts to move downward.

[0071] The die pin 23 remains fixed, but in addition to the movement of the punch 24, the die 21 and the stripper 22 also move, whereby the lower end 131 of the rod 13 is relatively more pressed by the die pin 23. Due to this pressurization, the lower part of the rod 13 is also caulked and greatly deformed.

[0072] Furthermore, since the punch 24 also continues to move, the upper portion of the rod 13 is further caulked and greatly deformed.

[0073] (Step e) When the die 21 contacts the die damper 232 , the downward movement of the die 21 , the ejector 22 , and the punch 24 stops. At this time, the upper surface of the die 21 and the upper surface of the die pin 23 are flush with each other.

[0074] If the riveting of the rod 13 is completed, Figure 3 As shown in (e), the protrusion 112 of the base member 11, the fitting hole 123 of the U-shaped member 12, and the upper portion of the rod 13 are formed into a substantially truncated cone shape. In addition, the lower portion of the rod 13 is also riveted and accommodated in the recess 114 formed as a countersink of the base member 11. The riveted head 1321 of the lower end portion 131 of the rod 13 is on the same plane as the other surface 1112 of the base member 11.

[0075] After stopping, the die 21, the stripper 22, and the punch 24 immediately start to move upward and return to their original positions.

[0076] One structure 1 is formed in one cycle of the above-mentioned steps a to e, and the cycle is repeated, whereby the structure 1 can be mass-produced.

[0077] Figure 4 Graphs showing positional changes of the die 21, the protrusion 224 of the stripper 22, and the punch 24 in one cycle, (1), (2), and (3) respectively indicate the positions of the punch 24, the protrusion 224 of the stripper 22, and the die 21. (a), (b), and (e) in the graph respectively indicate the positions of the punch 24, the protrusion 224 of the stripper 22, and the die 21. Figure 3 (a) Figure 3 (b) and Figure 3 (e) The state shown at time t.

[0078] As described above, the lower end portion 131 of the rod 13 is riveted by the die pin 23, and when riveting is completed, the upper surface of the die 21 is flush with the upper surface of the die pin 23. Therefore, the riveted head 1321 of the lower end portion 131 of the rod 13 is formed flush with the other surface 1112 of the base member 11 with high precision.

[0079] This highly accurate planarity allows the other surface 1112 of the base member 11 to be in contact with the surface of another member such as the cooled member without a gap. This reduces the thermal resistance at the boundary between the two surfaces, and improves the heat dissipation efficiency as a heat sink.

[0080] Furthermore, since the lower end portion 131 of the rod 13 is riveted and accommodated in the recess 114 of the base member 11 , the riveted head portion 1311 of the lower end portion 131 is strongly pressed against the inner surface of the recess 114 of the base member 11 .

[0081] By this strong pressure bonding, the base member 11 and the rod 13 are firmly fixed, and the thermal resistance at the interface between the base member 11 and the rod 13 is reduced, thereby improving the heat dissipation efficiency as a heat sink.

[0082] Furthermore, the structure 1 can be manufactured by fixing the base member 11 and the U-shaped member 12 only by using the cylindrical rod 13 , so the manufacturing cost can be reduced.

[0083] In the first embodiment, the rod 13 is pressed from above by the punch 24 , and the lower end portion 131 is pressed relatively by the die pin 23 .

[0084] This is not limited to the above, and the lower end portion 131 may be pressurized by moving the die pin 23 upward while the die 21 and the demolding device 22 are fixed, that is, the rod 13 is pressurized from above by the punch 24, and the lower end portion 131 is pressurized directly by the die pin 23.

[0085] In either method, the rod 13 is pressurized from both upper and lower directions to be riveted.

[0086] On the other hand, the lower end 131 and the upper end 132 of the rod 13 can be caulked by moving only the punch 24, that is, the rod 13 can be pressurized and caulked only from the upper direction. In addition, the rod 13 can be pressurized and caulked only from the lower direction by moving only the die pin 23. In either method, the rod 13 is pressurized and caulked from the upper and lower directions.

[0087] In the method of applying pressure to the rod 13 from both upper and lower directions for riveting, the moving distance (stroke) of the die 21, the ejector 22, the die pin 23, the punch 24, etc. can be halved compared to the method of applying pressure to the rod 13 from one direction for riveting. This can prevent the rod 13 from buckling when riveting.

[0088] [Modification 1]

[0089] Modification 1 is a structure in which another member is arranged between the base member 11 and the U-shaped member 12 of Embodiment 1. (Not shown.)

[0090] An intermediate member (fourth member) formed of another material such as copper having a higher thermal conductivity than aluminum may be disposed between the base member 11 formed of aluminum and the U-shaped member 12 , and the three members may be caulked together by the rod 13 .

[0091] In this way, when a material having a high thermal conductivity is used, the heat transfer efficiency of the heat sink as a whole is improved, and the heat dissipation performance can be improved.

[0092] Furthermore, an intermediate member (fourth member) formed of a metal material such as stainless steel having a higher strength than aluminum may be disposed between the base member 11 formed of aluminum and the U-shaped member 12 , and the three members may be caulked together by the rod 13 .

[0093] In this way, when a material having high strength is used, the strength of the heat sink as a whole is improved, and a heat sink suitable for a portion requiring strength can be configured.

[0094] In addition, the intermediate member does not need to be a member having the same shape and size as the first base member 31 and / or the U-shaped member 12, and may be a member having a different shape and size.

[0095] Furthermore, two or more intermediate members may be disposed between the base member 11 and the U-shaped member 12 .

[0096] [Implementation Method 2]

[0097] Figure 7 is a diagram of a structure 3 according to a second embodiment of the present invention, Figure 7 (a) is a diagram before riveting. Figure 7 (b) is a diagram showing the state after riveting.

[0098] [Structure of each component]

[0099] The structure 3 of the second embodiment is composed of three metal members: a first base member 31 (first member), a second base member 32 (third member), and a rod 13 (caulking body).

[0100] The first base member 31 and the second base member 32 are members of the same shape.

[0101] The structure 3 is a heat sink, and the first base member 31 or the second base member 32 is brought into contact with the surface of the member to be cooled, so that heat is released from the first base member 31 and the second base member 32 to the air.

[0102] The first base member 31 is a rectangular plate-shaped member formed of aluminum, and is formed with a circular through hole 313 (first through hole) through which the rod 13 can be inserted. The other surface 312 (a flat surface of the first member) of the first base member 31 has another opening (first opening) of the through hole 313. A circular recess 314 (first recess) is formed around the other opening of the through hole 313, which is concentric with the through hole 313 and has a larger diameter than the through hole 313. As described later, the recess 314 is formed as a countersink for accommodating the head 1311 (first head) of the lower end portion formed when the rod 13 is riveted, and its radius and depth are designed to accommodate the head 1311 of the lower end portion without more or less.

[0103] The second base member 32 is a rectangular plate-shaped member formed of aluminum, and is formed with a circular through hole 323 (third through hole) through which the rod 13 can be inserted. The other surface 322 (a flat surface portion of the third member) of the second base member 32 has another opening (third opening) of the through hole 323. A circular recess 324 (third recess) is formed around the other opening of the through hole 323, which is concentric with the through hole 323 and has a larger diameter than the through hole 323. As described later, the recess 324 is formed as a countersink for accommodating the head 1321 (second head) of the upper end portion formed when the rod 13 is riveted, and its radius and depth are designed to accommodate the head 1321 of the upper end portion without more or less.

[0104] The rod 13 is a cylindrical column formed of aluminum, and is formed to be longer than the sum of the length of the through hole 313 and the depth of the recess 314, and the sum of the length of the through hole 323 and the depth of the recess 324. The diameter of the rod 13 is substantially the same as the diameter of the through hole 313 of the first base member 31 and the through hole 323 of the second base member 32, and the rod 13 can be inserted into the through hole 313 and the through hole 323 without a gap.

[0105] [Structure after riveting]

[0106] The first base member 31 and the second base member 32 are aligned with each other in such a way that the through hole 313 of the first base member 31 and the through hole 323 of the second base member 32 are aligned, and the rod 13 is inserted into the through hole 313 of the first base member 31 and the through hole 323 of the second base member 32, and the rod 13 is pressed from both the top and the bottom by a punch 2' to be riveted. The structure 3 thus obtained is shown in FIG. Figure 7 (b).

[0107] The lower end portion 131 of the rod 13 is caulked and formed so as to be housed in the head portion 1311 of the recessed portion 314 of the first base member 31 substantially without a gap.

[0108] Similarly, the upper end portion 132 of the rod 13 is caulked and formed so as to be housed in the head portion 1321 of the recessed portion 324 of the second base member 32 substantially without a gap.

[0109] The head portion 1311 and the other surface 312 of the first base member 31 , and the head portion 1321 and the other surface 322 of the second base member 32 are on the same plane.

[0110] The head portion 1311 and the recessed portion 314 of the first base member 31 , and the head portion 1321 and the recessed portion 324 of the second base member 32 are caulked by pressurizing the rod 13 , and are in contact with each other in a state of being strongly pressed against each other.

[0111] The rod 13, which is riveted by applying pressure from top to bottom, is deformed into a barrel shape with a bulge near the center of the length direction. The bulge is in the barrel shape itself, and the circumference of the rod 13 and the inner circumference of the through holes 313 and 323 are tightly fitted, so that the rod 13 will not fall off.

[0112] The first base member 31 and the second base member 32 are not limited to rectangular shapes, and any shapes can be selected according to the application.

[0113] The first base member 31 and the second base member 32 do not need to be members of the same shape and size, and may be members of different shapes and sizes.

[0114] The first base member 31 , the second base member 32 , and the rod 13 may be formed of metals other than aluminum (for example, single metals such as copper and iron), alloys, and the like.

[0115] Furthermore, the first base member 31 , the second base member 32 , and the rod 13 do not need to be formed of the same metal, and one may be formed of a metal different from the other two, or all three may be formed of different metals.

[0116] Furthermore, other members may be disposed between the first base member 31 and the second base member 32 .

[0117] [Riveting device (fixing device)]

[0118] use Figure 8 , the structure of the punching machine 2', which is a riveting device for riveting the structure 1, will be described.

[0119] The punching machine 2' has the same structure as the punching machine 2, and includes a die 21' abutting against the first base member 31 from below, a stripper 22' abutting against the second base member 32 from above, a die pin 23' abutting against the rod 13 from below, and a punch 24' abutting against the rod 13 from above.

[0120] The shape of the demolding device 22 ′ of the punching machine 2 ′ is different from the shape of the demolding device 22 of the punching machine 2 .

[0121] Since the stripper 22 ′ contacts the second base member 32 from above, the contact surface thereof is formed in a flat surface shape.

[0122] [Riveting process (fixing method)]

[0123] Figure 8 The base member 11, the U-shaped member 12 and the rod 13 are connected by caulking. Figure 2 (a) Diagram of the corresponding process.

[0124] The caulking process is performed using a press machine 2'. In the press machine 2', the rod 13 is caulked by moving a die 21', a stripper 22', and a punch 24'.

[0125] The caulking process of the second embodiment is substantially the same as the caulking process of the first embodiment, and therefore only the differences will be described.

[0126] (Step a) The assembly formed by overlapping one surface 311 of the first base member 31 and one surface 321 of the second base member 32 is placed on the die 21' so that the through hole 313 of the first base member 31 and the through hole 323 of the second base member 32 are aligned. Next, the rod 13 is inserted into the through hole 313 of the first base member 31 and the through hole 323 of the second base member 32, and the lower end 131 of the rod 13 is placed on the die pin 23'. Then, the demolding device 22' and the punch 24' are moved downward, as shown in FIG. Figure 8 As shown, the demolding tool 22 ′ is in contact with the second base member 32 .

[0127] (Step b to Step e) Step b to Step e are the same as Step b to Step e of the first embodiment, but the shape of the structure 3 when the caulking of the rod 13 is completed is different from the shape of the structure 1 of the first embodiment.

[0128] The lower end portion 131 and the upper end portion 132 of the rod 13 are riveted and respectively accommodated in the concave portion 314 of the first base member 31 and the concave portion 324 of the second base member 32 formed as countersunk holes. The riveted head portion 1311 of the lower end portion 131 and the riveted head portion 1321 of the upper end portion 132 of the rod 13 are respectively on the same plane as the other surface 312 of the first base member 31 and the other surface 322 of the second base member 32.

[0129] As described above, the lower end 131 and the upper end 132 of the rod 13 are riveted by the die pin 23' and the punch 24', respectively. When the riveting is completed, the upper surface of the die 21' and the lower surface of the stripper 22' are on the same plane as the upper surface of the die pin 23' and the lower surface of the punch 24', respectively. Therefore, the riveted head 1311 of the lower end 131 of the rod 13 and the riveted head 1321 of the upper end 132 are formed with high precision to be on the same plane as the other surface 312 of the first base member 31 and the other surface 322 of the second base member 32, respectively.

[0130] This high-precision planarity allows the other surface 312 of the first base member 31 and the other surface 322 of the second base member 32 to contact the surfaces of other components such as the cooled component without a gap. This reduces the thermal resistance at the boundary between the two surfaces, and improves the heat dissipation efficiency as a heat sink.

[0131] Furthermore, the lower end portion 131 of the rod 13 is riveted and accommodated in the recess 314 of the first base member 31, so that the riveted head 1311 of the lower end portion 131 is strongly pressed against the inner surface of the recess 314 of the first base member 31. Similarly, the riveted head 1321 of the upper end portion 132 is strongly pressed against the inner surface of the recess 324 of the second base member 32.

[0132] This strong pressure bonding firmly fixes the first base member 31 and the second base member 32 to the rod 13 , reduces the thermal resistance at the interface between the first base member 31 and the second base member 32 and the rod 13 , and improves the heat dissipation efficiency as a heat sink.

[0133] Furthermore, the structure 3 can be manufactured by fixing the first base member 31 and the second base member 32 using only the cylindrical rod 13 , so that the manufacturing cost can be reduced.

[0134] In the second embodiment, similarly to the first embodiment, the rod 13 is pressed from above by the punch 24 ′, and the lower end portion 131 is relatively pressed by the die pin 23 ′.

[0135] The present invention is not limited thereto, and the lower end portion 131 may be pressurized by moving the die pin 23' upward while the die 21' and the ejector 22' are fixed, that is, the rod 13 may be pressurized from above by the punch 24', and the lower end portion 131 may be pressurized directly by the die pin 23'.

[0136] In either method, the rod 13 is pressurized from both upper and lower directions to be riveted.

[0137] On the other hand, by moving only the punch 24', the lower end 131 and the upper end 132 of the rod 13 can also be riveted, that is, the rod 13 can be pressurized and riveted only from the upper direction. In addition, by moving only the die pin 23', the rod 13 can also be pressurized and riveted only from the lower direction. In either method, the rod 13 is pressurized and riveted from the upper and lower directions.

[0138] In the method of applying pressure to the rod 13 from both upper and lower directions for riveting, the moving distance (stroke) of the die 21', the ejector 22', the die pin 23', the punch 24', etc. can be halved compared to the method of applying pressure to the rod 13 from one direction. This can prevent the rod 13 from buckling when riveting.

[0139] [Modification 2]

[0140] Modification 2 is a structure 4 in which another member is arranged between the first base member 31 and the second base member 32 of the second embodiment.

[0141] Fig. 9 is a diagram of structure 4 of variation 2, Fig. 9 (a) is a diagram before riveting. Fig. 9 (b) is a diagram showing the state after riveting.

[0142] Alternatively, the intermediate member 33 (fourth member) formed of another material such as copper having a higher thermal conductivity than aluminum may be disposed between the first base member 31 and the second base member 32 formed of aluminum, and the three members may be caulked together by the rod 13 .

[0143] In this way, when a material having a high thermal conductivity is used, the heat transfer efficiency of the heat sink as a whole is improved, and the heat dissipation performance can be improved.

[0144] Furthermore, an intermediate member (fourth member) formed of a metal material such as stainless steel having a higher strength than aluminum may be disposed between the first base member 31 and the second base member 32 formed of aluminum, and the three members may be caulked together by the rod 13 .

[0145] In this way, when a material having high strength is used, the strength of the heat sink as a whole is improved, and a heat sink suitable for a portion requiring strength can be configured.

[0146] In addition, the intermediate member 33 does not need to be a member having the same shape and size as the first base member 31 and / or the second base member 32 , and may be a member having a different shape and size.

[0147] Furthermore, two or more intermediate members may be disposed between the first base member 31 and the second base member 32 .

[0148] In the above, the structure 1 in which one plate-like component, namely the base component 11, and one U-shaped component 12 are fixed is taken as the first embodiment, and the structure 3 in which two plate-like components, namely the first base component 31 and the second base component 32 are fixed is taken as the second embodiment, and the fixed structures are illustrated and explained, but the present invention is not limited to these first and second embodiments.

[0149] The fixed member may be a member of any shape. Furthermore, as shown in Modification 1 and Modification 2, the fixed member is not limited to two members, and may be three or more members.

[0150] Furthermore, with reference to the accompanying drawings, structures 1, 3 and 4, punch 2 and punch 2' and a fixing method using them in embodiment 1 and its variant 1 and embodiment 2 and its variant 2 of the present invention are described in detail, but the specific structure is not limited to these embodiments and their variants, and even if there are design changes that do not depart from the scope of the purpose of the present invention, they are also included in the present invention.

[0151] Furthermore, the aforementioned embodiments and their modifications can be combined by utilizing each other's techniques as long as there are no particular contradictions or problems in their purposes, structures, etc.

[0152] Explanation of symbols

[0153] 1-structure, 11-base member, 111-base, 1111-one surface of the base 111, 1112-the other surface of the base 111, 112-protrusion, 113-through hole, 114-recess, 12-U-shaped member, 121-base, 122-bending portion, 123-fitting hole, 13-rod, 131-lower end, 1311-head to which the lower end 131 is riveted, 132-upper end, 1321-head to which the upper end 132 is riveted, 2, 2'-punch, 21, 21'-die, 211-die hanging bolt, 212-coil spring, 213-through hole, 22, 22'-mold stripper, 221-mold stripper Hanging bolt, 222-coil spring, 223-through hole, 224-protrusion, 23, 23'-die pin, 231-die pin gasket, 232-die damper, 24, 24'-punch, 241-punch gasket, 242-stripper damper, 3-structure, 31-first base member, 311-one surface of the first base member 31, 312-the other surface of the first base member 31, 313-through hole, 314-recess, 32-second base member, 321-one surface of the second base member 32, 322-the other surface of the second base member 32, 323-through hole, 324-recess, 33-intermediate member, 4-structure.

Claims

1. A structure having a plurality of components fixed thereto, wherein the plurality of components includes at least a first component, characterized in that: The first component is provided with a first through hole, A rivet body is inserted into the first through hole, A first opening is formed at one end of the first through hole, and the first opening is opened at a flat surface of the first member. A first recess is provided on a plane portion of the first member so as to surround the first opening. The first recess accommodates a first head portion of one end of the rivet body to be riveted. A flat surface portion of the first member is flush with the first head portion.

2. The structure according to claim 1, characterized in that The plurality of components include a second component, The other end of the first through hole is formed with a second opening, and the second opening is opened in a cylindrical protrusion formed on the other flat surface of the first member. The second member is arranged around the protrusion. A substantially annular fitting portion is formed on the second member, and the fitting portion fits with the protrusion. The protrusion, the swaged body in the protrusion, and the fitting portion are swaged to form a substantially truncated cone shape.

3. The structure according to claim 1, characterized in that The plurality of components include a third component, The third component is provided with a third through hole which is substantially concentric with and has the same diameter as the first through hole. The rivet body is inserted into the first through hole and the third through hole. A third opening is formed at one end of the third through hole, and the third opening is opened at a plane portion of the third member. A third recess is provided on a plane portion of the third component so as to surround the third opening. The third recess accommodates the second head portion of the other end of the riveted body to be riveted. A flat surface portion of the third member is on the same plane as the second head portion.

4. A radiator, characterized in that: The second member of the structure according to claim 2 has a rising portion, and the rising portion is perpendicular to the other planar portion of the first member.

5. The heat sink according to claim 4, characterized in that: A fourth member is disposed between the first member and the second member, and the fourth member has a higher thermal conductivity and / or strength than the first member and / or the second member.

6. A radiator, characterized in that: In the structure according to claim 2, a fourth member is arranged between the first member and the second member, and the fourth member has a higher thermal conductivity and / or strength than the first member and / or the second member.

7. A radiator, characterized in that: In the structure according to claim 3, a fourth member is arranged between the first member and the third member, and the fourth member has a higher thermal conductivity and / or strength than the first member and / or the third member.

8. The structure according to any one of claims 1 to 3 or the heat sink according to any one of claims 4 to 7, characterized in that: The riveted body is deformed into a substantially barrel shape.

9. A fixing method for fixing a plurality of components, characterized in that: The process is as follows: overlapping the plurality of components in such a manner that the through holes provided on the plurality of components are consistent; inserting a rivet body into the through holes of the plurality of components formed uniformly; as well as Both ends of the riveted body are riveted simultaneously.

10. The fixing method according to claim 9, characterized in that: By pressurizing the plurality of components, one end of the rivet body is relatively pressurized.

11. A fixing device having a punch, a stripper, a die and a die pin for fixing a plurality of parts, characterized in that: A rivet body is inserted into the through hole penetrating the plurality of components. The punch abuts against one end of the riveting body, The demoulding device abuts against a flat surface of the plurality of components. The die abuts against another planar portion of the plurality of components, The die pin abuts against the other end of the riveted body, The punch, the ejector, the die and / or the die pin are moved in such a way as to simultaneously rivet both ends of the riveted body.

12. The fixing device according to claim 11, characterized in that The punch, the ejector, and the die are moved in a state where the die pin is fixed, and the other end of the rivet body is relatively pressurized by the die pin.

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