US20260001120A1 - Fixed structure, fixing method, and fixing device - Google Patents

Fixed structure, fixing method, and fixing device

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Publication number
US20260001120A1
US20260001120A1 US18/992,731 US202218992731A US2026001120A1 US 20260001120 A1 US20260001120 A1 US 20260001120A1 US 202218992731 A US202218992731 A US 202218992731A US 2026001120 A1 US2026001120 A1 US 2026001120A1
Authority
US
United States
Prior art keywords
caulked
hole
base material
rod
die
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
US18/992,731
Other languages
English (en)
Inventor
Shu MATSUURA
Masaaki Nozaki
Yuji Tanaka
Yousuke Nakamura
Masaru Sakamoto
Hidenori KONTANI
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kaga Inc
Original Assignee
Kaga Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kaga Inc filed Critical Kaga Inc
Publication of US20260001120A1 publication Critical patent/US20260001120A1/en
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J15/00—Riveting
    • B21J15/02—Riveting procedures
    • B21J15/04—Riveting hollow rivets mechanically
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J13/00—Details of machines for forging, pressing, or hammering
    • B21J13/02—Dies or mountings therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J13/00—Details of machines for forging, pressing, or hammering
    • B21J13/08—Accessories for handling work or tools
    • B21J13/14—Ejecting devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J15/00—Riveting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K25/00—Uniting components to form integral members, e.g. turbine wheels and shafts, caulks with inserts, with or without shaping of the components
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B19/00—Bolts without screw-thread; Pins, including deformable elements; Rivets
    • F16B19/04—Rivets; Spigots or the like fastened by riveting
    • F16B19/06—Solid rivets made in one piece
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B5/00—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them
    • F16B5/04—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of riveting
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/001—Casings in the form of plate-like arrangements; Frames enclosing a heat exchange core
    • F28F9/002—Casings in the form of plate-like arrangements; Frames enclosing a heat exchange core with fastening means for other structures
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/20—Modifications to facilitate cooling, ventilating, or heating

Definitions

  • the present invention relates to a structure in which a plurality of members are fixed, a method of anchoring a plurality of members, and an anchoring device.
  • a caulking structure using a rivet or the like has been known as a method of fixing a plurality of members in the related art.
  • the structure fixed by the caulking structure with the rivet is a structure in which the head portions of both ends of the rivet protrude from the surface of the structure.
  • the head portion of the protruding rivet may cause inconvenience in the structure.
  • a method in which a recessed portion is formed on a surface of a structural body so that a head portion of the rivet does not protrude from the structural body, and the structural body is caulked with a rivet having a bowl-shaped head that fits into the recessed portion so that the protruding portion is not formed (PTL 2).
  • an object of the present invention is to provide a fixed structure, a fixing method, and a fixing device that can solve the above-described problem, maintain a high-accuracy flat surface, and reduce a manufacturing cost.
  • the present invention comprises the following configurations.
  • the present invention has the following configurations.
  • a fixing method of fixing a plurality of members comprising:
  • the present invention has the following configurations.
  • a fixing device for fixing a plurality of members comprising a punch, a stripper, a die, and a die pin, wherein
  • FIG. 1 is a view of a structure 1 of the first embodiment of the present invention, in which (a) shows a view before caulking and (b) shows a view after caulking.
  • FIG. 2 is a view showing a part of a caulking step of caulking a structure 1 of the first embodiment of the present invention with a press machine 2 .
  • FIG. 3 is a view showing a remainder of a caulking step of caulking the structure 1 of the first embodiment of the present invention with a press machine 2 .
  • FIG. 4 is a graph showing movement of each component of the press machine 2 in a caulking step of the first embodiment of the present invention.
  • FIG. 5 is a perspective image of a cut structure 1 according to the first embodiment of the present invention.
  • FIG. 6 is a perspective image of a cut structure 1 according to another example of the embodiment 1 of the present invention.
  • FIG. 7 is a view of a structure 3 of the second embodiment of the present invention, in which (a) shows a view before caulking and (b) shows a view after caulking.
  • FIG. 8 is a view showing a part of a caulking step of caulking the structure 3 of the second embodiment of the present invention with a press machine 2 ′.
  • FIG. 9 is a view of a structure 4 of Modification Example 2 of the present invention, in which (a) shows a view before caulking and (b) shows a view after caulking.
  • FIG. 1 is a view of a structure 1 of the first embodiment of the present invention, in which (a) shows a view before caulking and (b) shows a view after caulking.
  • the structure 1 of the first embodiment is composed of three metal members, that is, a base material 11 (first member), a U-shaped material 12 (second member), and a rod 13 (caulked body).
  • the structure 1 is a heat sink, and the base material 11 is brought into contact with a surface of a member to be cooled, and heat is released from the base material 11 and the U-shaped material 12 to the air.
  • the base material 11 is a rectangular plate-like member formed of aluminum, and has a base portion 111 and a columnar protrusion portion 112 (protrusion portion) that is provided to protrude from a center portion of one surface 1111 (other flat surface portion of the first member) of the base portion 111 .
  • a circular through-hole 113 (first through-hole) through which the rod 13 can be inserted is formed in the base material 11 so as to be concentric with the protrusion portion 112 .
  • the protrusion portion 112 has one opening portion (second opening portion) of the through-hole 113 , and the other opening portion (first opening portion) of the through-hole 113 is provided on the other surface 1112 (one flat surface portion of the first member) of the base portion 111 of the base material 11 .
  • a circular recessed portion 114 (first recessed portion) that is concentric with the through-hole 113 and has a diameter larger than the diameter of the through-hole 113 is formed around the other opening portion of the through-hole 113 .
  • the recessed portion 114 is formed as a notch for accommodating a head portion 1311 (first head portion) of the lower end portion 131 formed when the rod 13 is caulked, and the radius and the depth are designed so that the head portion 1311 of the lower end portion 131 can be accommodated without excess or deficiency.
  • the U-shaped material 12 is a member formed of aluminum, and is a rectangular plate material that is bent such that a cross section thereof is U-shaped, and comprises a base portion 121 and bending portions 122 (erecting portions).
  • the bending portions 122 are not limited to a shape that is bent at a right angle, and may have a shape that forms a curved surface.
  • An annular fitting hole 123 (fitting portion) that can be fitted to the protrusion portion 112 of the base material 11 is formed in the base portion 121 of the U-shaped material 12 .
  • the height of the fitting hole 123 is substantially the same as the height of the protrusion portion 112 .
  • the inner diameter of the fitting hole 123 is substantially the same as the outer diameter of the protrusion portion 112 of the base material 11 , and the fitting hole 123 can be fitted to the protrusion portion 112 without a gap.
  • the rod 13 is a column formed of aluminum and is formed to be longer than a length obtained by adding a length of the through-hole 113 and a depth of the recessed portion 114 .
  • the diameter of the rod 13 is substantially the same as the diameter of the through-hole 113 of the base material 11 , and the rod 13 can be inserted into the through-hole 113 without a gap.
  • the fitting hole 123 of the U-shaped material 12 is fitted to the protrusion portion 112 of the base material 11 , the rod 13 is inserted into the through-hole 113 of the base material 11 , and the rod 13 is pressed and caulked simultaneously from above and below by the press machine 2 .
  • the obtained structure 1 is shown in FIG. 1 ( b ) .
  • the lower end portion 131 of the rod 13 is formed into a head portion 1311 that is caulked and stored in the recessed portion 114 of the base material 11 with substantially no gap.
  • the head portion 1311 and the other surface 1112 of the base material 11 are flush with each other.
  • the head portion 1311 and the recessed portion 114 of the base material 11 are in contact with each other in a strongly pressure-bonded state by pressing and caulking the rod 13 .
  • the upper end portion 132 of the rod 13 is caulked and is formed into a substantially truncated conical shape together with the protrusion portion 112 of the base material 11 and the fitting hole 123 of the U-shaped material 12 .
  • This substantially truncated conical portion has a larger diameter than the original through-hole 113 , and the rod 13 does not come out of the through-hole 113 together with the head portion 1311 of the rod 13 .
  • the substantially truncated conical shape prevents the fitting hole 123 of the U-shaped material 12 from being disengaged from the protrusion portion 112 of the base material 11 .
  • the rod 13 that has been pressed and caulked from above and below is deformed into a substantially barrel shape in which the vicinity of the center portion in the length direction (between the substantially truncated conical portion and the head portion 1311 ) is swollen. Due to the shape of the truncated barrel shape itself and the firm adhesion between the peripheral surface of the rod 13 and the inner peripheral surface of the through-hole 113 , the rod 13 does not come out vertically.
  • FIG. 5 shows a perspective image of the cut and deformed structure after caulking.
  • the base material 11 is not limited to a rectangular shape, and any shape can be selected depending on the application.
  • the U-shaped material 12 is not limited to a rectangular shape before being bent in a U-shaped cross section, and any shape can be selected depending on the use application.
  • the height of the fitting hole 123 of the U-shaped material 12 does not need to be substantially the same as the height of the protrusion portion 112 of the base material 11 , may be lower than the height of the protrusion portion 112 , and may be the same as the thickness of the base portion 121 of the U-shaped material 12 .
  • the height of the fitting hole 123 may be slightly higher than the height of the protrusion portion 112 .
  • FIG. 6 shows an example in which the height of the fitting hole 123 is the same as the thickness of the base portion 121 .
  • the base material 11 , the U-shaped material 12 , and the rod 13 may be formed of a single metal of a metal other than aluminum, for example, copper or iron, an alloy, or the like.
  • the base material 11 , the U-shaped material 12 , and the rod 13 may be formed from the same metal, and one of the three may be formed from a metal different from the other two, or all three may be formed from different metals.
  • another member may be disposed between the base material 11 and the U-shaped material 12 .
  • a configuration of a press machine 2 which is a caulking device for caulking the structure 1 , will be described with reference to FIG. 2 ( a ) .
  • the press machine 2 includes a die 21 that comes into contact with the base material 11 from below, a stripper 22 that comes into contact with the U-shaped material 12 from above, a die pin 23 that comes into contact with the rod 13 from below, and a punch 24 that comes into contact with the rod 13 from above.
  • the die 21 is a thick plate-like member, and has an insertion hole 213 into which the die pin 23 can be inserted in the vicinity of the center.
  • the die 21 is configured to be lowered by movable means (not shown) together with the die suspension bolt 211 .
  • a die pin backing 231 is installed on the die suspension bolt 211 so as to be slidable up and down.
  • a coil spring 212 is installed concentrically with the die suspension bolt 211 between the die 21 and the die pin backing 231 , and the coil spring 212 biases the die 21 and the die pin backing 231 in a direction in which the die 21 and the die pin backing 231 are spaced apart from each other.
  • the die pin 23 is a rod-like member and is installed between the insertion hole 213 provided in the die 21 and the die pin backing 231 .
  • a die damper 232 is disposed around the die pin 23 , and when the die 21 is lowered by a predetermined amount, the die 21 comes into contact with the die damper 232 .
  • the stripper 22 is a thick plate-like member and has an insertion hole 223 into which the punch 24 can be inserted in the vicinity of the center.
  • the stripper 22 includes a protruding portion 224 that protrudes downward from the body portion of the stripper 22 so as to be able to abut on the base portion 121 while avoiding the bending portion 122 of the U-shaped material 12 .
  • stripper suspension bolts 221 are attached to the stripper 22 .
  • the stripper 22 is configured to be lowered by movable means (not shown) together with the stripper suspension bolts 221 .
  • a punch backing 241 is installed on the stripper suspension bolts 221 so as to slidable up and down.
  • Coil springs 222 are installed concentrically with the stripper suspension bolts 221 between the stripper 22 and the punch backing 241 , and the coil springs 222 bias the stripper 22 and the punch backing 241 in a direction in which the stripper 22 and the punch backing 241 are spaced apart from each other.
  • the punch 24 is a rod-like member and is installed between the insertion hole 223 provided in the stripper 22 and the punch backing 241 .
  • the punch 24 is configured to be lowered by movable means (not shown) together with the punch backing 241 .
  • a stripper damper 242 is disposed around the punch 24 , and when the punch backing 241 is lowered by a predetermined amount, the punch 24 abuts on the stripper damper 242 .
  • FIGS. 2 and 3 are diagrams showing a caulking step of caulking the base material 11 , the U-shaped material 12 , and the rod 13 , and the steps proceed in the order of FIG. 2 ( a ) , FIG. 2 ( b ) , FIG. 3 ( c ) , FIG. 3 ( d ) , and FIG. 3 ( e ) .
  • the caulking step is performed by the press machine 2 .
  • the rod 13 is caulked by moving the die 21 , the stripper 22 , and the punch 24 .
  • Step a An assembly in which the fitting hole 123 of the U-shaped material 12 is fitted to the protrusion portion 112 of the base material 11 and the U-shaped material 12 is superimposed on the base material 11 is placed on the die 21 .
  • the rod 13 is inserted into the through-hole 113 of the base material 11 , and the lower end portion 131 of the rod 13 is placed on the die pin 23 .
  • the stripper 22 and the punch 24 are moved downward, and the protruding portion 224 of the stripper 22 abuts on the base portion 121 of the U-shaped material 12 as shown in FIG. 2 ( a ) .
  • Step b The stripper 22 is stopped, and only the punch 24 continues to move downward, and as shown in FIG. 2 ( b ) , the punch 24 abuts on the upper end portion 132 of the rod 13 .
  • Step c Further, when the punch 24 moves downward, the upper portion of the rod 13 is slightly deformed by being caulked as shown in FIG. 3 ( a ) .
  • the die pin 23 is fixed, but the lower end portion 131 of the rod 13 is relatively pressed by the die pin 23 by the movement of the punch 24 , and thus the lower portion of the rod 13 is also slightly deformed by being caulked.
  • Step d As shown in FIG. 3 ( d ) , when the punch backing 241 comes into contact with the stripper damper 242 , the movement of the stripper 22 is restarted, and the stripper 22 moves downward together with the punch 24 . At that time, the die 21 also starts moving downward.
  • the die pin 23 is fixed, but the die 21 and the stripper 22 are also moved in addition to the movement of the punch 24 , so that the lower end portion 131 of the rod 13 is relatively more pressed by the die pin 23 . By this pressing, the lower portion of the rod 13 is also deformed by being caulked.
  • Step e When the die 21 comes into contact with the die damper 232 , the downward movement of the die 21 , the stripper 22 , and the punch 24 is stopped. At that time, the upper surface of the die 21 is flush with the upper surface of the die pin 23 .
  • the protrusion portion 112 of the base material 11 , the fitting hole 123 of the U-shaped material 12 , and the upper portion of the rod 13 are formed in a substantially truncated conical shape.
  • the lower portion of the rod 13 is also caulked and stored in the recessed portion 114 of the base material 11 formed as a recess.
  • the head portion 1321 of the lower end portion 131 of the rod 13 that is caulked is flush with the other surface 1112 of the base material 11 .
  • the die 21 , the stripper 22 , and the punch 24 immediately start moving upward after stopping and return to the original positions.
  • one structural body 1 is molded, and by repeating this cycle, the structure 1 can be mass-produced.
  • FIG. 4 is a graph showing changes in positions of the die 21 , the protruding portion 224 of the stripper 22 , and the punch 24 in one cycle, and (1), (2), and (3) show the positions of the punch 24 , the protruding portion 224 of the stripper 22 , and the die 21 , respectively.
  • (a), (b), and (e) in the graph respectively indicate the time t at which the state shown in FIG. 3 ( a ) , FIG. 3 ( b ) , and FIG. 3 ( e ) is obtained.
  • the lower end portion 131 of the rod 13 is caulked by the die pin 23 , and when the caulking is completed, the upper surface of the die 21 is flush with the upper surface of the die pin 23 . Therefore, the head portion 1321 of the lower end portion 131 of the rod 13 that is caulked is formed to be flush with the other surface 1112 of the base material 11 with high accuracy.
  • the other surface 1112 of the base material 11 can be brought into contact with a surface of another member such as a member to be cooled without a gap. As a result, thermal conduction resistance at the boundary between the two surfaces is reduced, and the heat dissipation efficiency as a heat sink is improved.
  • the caulked head portion 1311 of the lower end portion 131 is strongly pressure-bonded to the inner surface of the recessed portion 114 of the base material 11 .
  • the base material 11 and the rod 13 are firmly anchored, and the thermal conduction resistance at the boundary surface between the base material 11 and the rod 13 is reduced, and the heat dissipation efficiency as a heat sink is increased.
  • the structure 1 can be manufactured only by fixing the base material 11 and the U-shaped material 12 using the rod 13 having a cylindrical shape, the manufacturing cost can be reduced.
  • the rod 13 is pressed from above by the punch 24 , and at the same time, the lower end portion 131 is pressed by the die pin 23 .
  • the present invention is not limited thereto, and the lower end portion 131 may be pressed by moving the die pin 23 upward while the die 21 and the stripper 22 are fixed, that is, the rod 13 may be pressed from above by the punch 24 , and at the same time, the lower end portion 131 may be directly pressed by the die pin 23 .
  • the rod 13 is pressed and caulked from both the vertical directions at the same time.
  • the lower end portion 131 and the upper end portion 132 of the rod 13 can be caulked, that is, the rod 13 can be caulked by pressing only in the upward direction by moving only the punch 24 .
  • the rod 13 can be pressed and caulked only from below by moving the die pin 23 . In any method, the rod 13 is pressed and caulked from the up-down direction.
  • the moving distance (stroke) of the die 21 , the stripper 22 , the die pin 23 , the punch 24 , and the like can be reduced to half as compared with the method of pressing and caulking from one direction. Accordingly, buckling of the rod 13 that occurs when the rod 13 is caulked can be prevented.
  • Modification Example 1 is a structure in which another member is disposed between the base material 11 and the U-shaped material 12 of the first embodiment (not shown in the drawing).
  • An intermediate material (fourth member) formed of a material such as copper having a thermal conductivity higher than that of aluminum can be disposed between the base material 11 formed of aluminum and the U-shaped material 12 , and the three members can be caulked by the rod 13 .
  • the thermal conductivity efficiency of the entire heat sink is improved, and the heat dissipating performance can be improved.
  • an intermediate material (fourth member) formed of a metal material such as stainless steel having a higher strength than aluminum can be disposed between the base material 11 and the U-shaped material 12 formed of aluminum, and the three members can be caulked by the rod 13 .
  • the strength of the entire heat sink is increased, and a heat sink suitable for a portion where strength is required can be configured.
  • the intermediate material does not need to be a member having the same shape and the same size as the first base material 31 and/or the U-shaped material 12 , and may be a member having a different shape and a different size.
  • two or more intermediate materials may be disposed between the base material 11 and the U-shaped material 12 .
  • FIG. 7 is a view of a structure 3 of the second embodiment of the present invention, in which (a) is a view before caulking and (b) is a view after caulking.
  • the structure 3 of the second embodiment is composed of three metal members, that is, a first base material 31 (first member), a second base material 32 (third member), and a rod 13 (caulked body).
  • the first base material 31 and the second base material 32 are members having the same shape.
  • the structure 3 is a heat sink, and the first base material 31 or the second base material 32 is brought into contact with the surface of the member to be cooled to release heat from the first base material 31 and the second base material 32 to the air.
  • the first base material 31 is a rectangular plate-like member formed of aluminum, and a circular through-hole 313 (first through-hole) into which the rod 13 can be inserted is formed.
  • the other opening portion (first opening portion) of the through-hole 313 is provided on the other surface 312 (one flat surface portion of the first member) of the first base material 31 .
  • a circular recessed portion 314 (first recessed portion) that is concentric with the through-hole 313 and has a diameter larger than the diameter of the through-hole 313 is formed around the other opening portion of the through-hole 313 .
  • the recessed portion 314 is formed as a recess for housing the head portion 1311 (first head portion) of the lower end portion formed when the rod 13 is caulked, and the radius and the depth are designed so that the head portion 1311 of the lower end portion can be housed without excess or deficiency.
  • the second base material 32 is a rectangular plate-like member formed of aluminum, and a circular through-hole 323 (third through-hole) into which the rod 13 can be inserted is formed.
  • the other opening portion (third opening portion) of the through-hole 323 is provided on the other surface 322 (one flat surface portion of the third member) of the second base material 32 .
  • a circular recessed portion 324 (third recessed portion) that is concentric with the through-hole 323 and has a diameter larger than the diameter of the through-hole 323 is formed around the other opening portion of the through-hole 323 .
  • the recessed portion 324 is formed as a recess portion for housing the head portion 1321 (second head portion) of the upper end portion formed when the rod 13 is caulked, and the radius and the depth are designed so that the head portion 1321 of the upper end portion can be housed without excess or deficiency.
  • the rod 13 is a cylinder formed of aluminum, and is formed to be longer than a length obtained by adding a length of the through-hole 313 and a depth of the recessed portion 314 and a length obtained by adding a length of the through-hole 323 and a depth of the recessed portion 324 .
  • the diameter of the rod 13 is substantially the same as the diameter of the through-hole 313 of the first base material 31 and the diameter of the through-hole 323 of the second base material 32 , and the rod 13 can be inserted into the through-hole 313 and the through-hole 323 without a gap.
  • the one surface 311 of the first base material 31 and the one surface 321 of the second base material 32 are overlapped with each other such that the through-hole 313 of the first base material 31 and the through-hole 323 of the second base material 32 coincide with each other, and the rod 13 is inserted into the through-hole 313 of the first base material 31 and the through-hole 323 of the second base material 32 , and the rod 13 is pressed and caulked from above and below by the press machine 2 ′.
  • the structure 3 obtained in this way is shown in FIG. 7 ( b ) .
  • the lower end portion 131 of the rod 13 is formed into a head portion 1311 that is caulked and stored in the recessed portion 314 of the first base material 31 with substantially no gap.
  • the upper end portion 132 of the rod 13 is formed into a head portion 1321 that is caulked and stored in the recessed portion 324 of the second base material 32 with substantially no gap.
  • the head portion 1311 and the other surface 312 of the first base material 31 are flush with each other, and the head portion 1321 and the other surface 322 of the second base material 32 are flush with each other.
  • the head portion 1311 and the recessed portion 314 of the first base material 31 , and the head portion 1321 and the recessed portion 324 of the second base material 32 are in contact with each other in a strongly pressure-bonded state by pressing and caulking the rod 13 .
  • the rod 13 that has been pressed and caulked from above and below is deformed into a substantially barrel shape in which the vicinity of the center in the length direction is bulged. Due to the shape of the truncated barrel shape itself and the firm adhesion between the peripheral surface of the rod 13 and the inner peripheral surface of the through-hole 313 or 323 , the rod 13 does not come off in the vertical direction.
  • Each of the first base material 31 and the second base material 32 is not limited to a rectangular shape, and any shape can be selected depending on the use application.
  • the first base material 31 and the second base material 32 do not need to be members having the same shape and the same size, and may be members having different shapes and different sizes.
  • the first base material 31 , the second base material 32 , and the rod 13 may be formed of a single metal, an alloy, or the like of a metal other than aluminum, for example, copper or iron.
  • first base material 31 , the second base material 32 , and the rod 13 may be formed of a metal different from the other two, or all three may be formed of different metals.
  • another member may be disposed between the first base material 31 and the second base material 32 .
  • a configuration of a press machine 2 ′ that is a caulking device for caulking the structure 1 will be described with reference to FIG. 8 .
  • the press machine 2 ′ has the same configuration as the press machine 2 , and includes a die 21 ′ that abuts the first base material 31 from below, a stripper 22 ′ that abuts the second base material 32 from above, a die pin 23 ′ that abuts the rod 13 from below, and a punch 24 ′ that abuts the rod 13 from above.
  • the shape of the stripper 22 ′ of the press machine 2 ′ is different from the shape of the stripper 22 of the press machine 2 .
  • the contact surface thereof is formed in a planar shape.
  • FIG. 8 is a view showing a step corresponding to FIG. 2 ( a ) in a caulking step of caulking the base material 11 , the U-shaped material 12 , and the rod 13 .
  • the caulking step is performed by the press machine 2 ′.
  • the rod 13 is caulked by moving the die 21 ′, the stripper 22 ′, and the punch 24 ′. Since the caulking step of the second embodiment is substantially the same as the caulking step of the first embodiment, only the different points will be described.
  • Step a An assembly in which one surface 311 of the first base material 31 and one surface 321 of the second base material 32 are superimposed on each other such that the through-hole 313 of the first base material 31 and the through-hole 323 of the second base material 32 coincide with each other is placed on the die 21 ′.
  • the rod 13 is inserted into the through-hole 313 of the first base material 31 and the through-hole 323 of the second base material 32 , and the lower end portion 131 of the rod 13 is placed on the die pin 23 ′.
  • the stripper 22 ′ and the punch 24 ′ move downward, and the stripper 22 ′ abuts on the second base material 32 as shown in FIG. 8 .
  • Steps b to e are the same as the steps b to 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.
  • the lower end portion 131 and the upper end portion 132 of the rod 13 are caulked and stored in the recessed portion 314 of the first base material 31 and the recessed portion 324 of the second base material 32 , which are formed as recesses.
  • the head portion 1311 of the lower end portion 131 of the rod 13 that is caulked and the head portion 1321 of the upper end portion 132 that is caulked are flush with the other surface 312 of the first base material 31 and the other surface 322 of the second base material 32 , respectively.
  • the lower end portion 131 and the upper end portion 132 of the rod 13 are respectively caulked by the die pin 23 ′ and the punch 24 ′, and when the caulking is completed, the upper surface of the die 21 ′ and the lower surface of the stripper 22 ′ are respectively flush with the upper surface of the die pin 23 ′ and the lower surface of the punch 24 ′. Therefore, the head portion 1311 of the lower end portion 131 of the rod 13 that is caulked and the head portion 1321 of the upper end portion 132 of the rod 13 that is caulked are formed to be flush with each other with high accuracy, and the other surface 312 of the first base material 31 and the other surface 322 of the second base material 32 are formed to be flush with each other with high accuracy.
  • the other surface 312 of the first base material 31 and the other surface 322 of the second base material 32 can be brought into contact with the surface of another member such as the member to be cooled without a gap. As a result, thermal conduction resistance at the boundary between these two surfaces is reduced, and heat dissipation efficiency as a heat sink is improved.
  • the caulked head portion 1311 of the lower end portion 131 is strongly pressure-bonded to the inner surface of the recessed portion 314 of the first base material 31 .
  • the caulked head portion 1321 of the upper end portion 132 is strongly pressure-bonded to the inner surface of the recessed portion 324 of the second base material 32 .
  • the first base material 31 and the second base material 32 are firmly anchored to the rod 13 , and the thermal conduction resistance at the boundary surface between the first base material 31 and the second base material 32 and the rod 13 is reduced, and the heat dissipation efficiency as a heat sink is increased.
  • the structure 3 can be manufactured only by fixing the first base material 31 and the second base material 32 using the rod 13 having a cylindrical shape, the manufacturing cost can be reduced.
  • the rod 13 is pressed from above by the punch 24 ′, and at the same time, the lower end portion 131 is pressed by the die pin 23 ′.
  • the present invention is not limited thereto, and the lower end portion 131 may be pressed by moving the die pin 23 ′ upward while the die 21 ′ and the stripper 22 ′ are fixed, that is, the rod 13 may be pressed from above by the punch 24 ′ and at the same time, the lower end portion 131 may be directly pressed by the die pin 23 ′.
  • the rod 13 is pressed and caulked from both the vertical directions at the same time.
  • the lower end portion 131 and the upper end portion 132 of the rod 13 can be caulked, that is, the rod 13 can be caulked by pressing only in the upward direction by moving only the punch 24 ′.
  • the rod 13 can also be pressed and caulked only by moving the die pin 23 ′. In any method, the rod 13 is pressed and caulked from the up-down direction.
  • the moving distance (stroke) of the die 21 ′, the stripper 22 ′, the die pin 23 ′, the punch 24 ′, and the like can be reduced to half as compared with the method of pressing and caulking the rod 13 from one direction. Accordingly, buckling of the rod 13 that occurs when the rod 13 is caulked can be prevented.
  • Modification Example 2 is a structure 4 in which another member is disposed between the first base material 31 and the second base material 32 of the second embodiment.
  • FIG. 9 is a view of a structure 4 of Modification Example 2, in which (a) shows a view before caulking and (b) shows a view after caulking.
  • An intermediate material 33 (fourth member) formed of a material such as copper having a thermal conductivity higher than that of aluminum can also be disposed between the first base material 31 and the second base material 32 formed of aluminum, and the three members can be caulked by the rod 13 .
  • the thermal conductivity efficiency of the entire heat sink is improved, and the heat dissipating performance can be improved.
  • an intermediate material (fourth member) formed of a metal material such as stainless steel having higher strength than aluminum is disposed between the first base material 31 and the second base material 32 formed of aluminum, and the three members can be caulked by the rod 13 .
  • the strength of the entire heat sink is increased, and a heat sink suitable for a portion where strength is required can be configured.
  • the intermediate material 33 does not need to be a member having the same shape and the same size as the first base material 31 and/or the second base material 32 , and may be a member having a different shape and a different size.
  • two or more intermediate materials may be disposed between the first base material 31 and the second base material 32 .
  • the structure 1 in which the base material 11 as one plate-like member and the U-shaped material 12 are fixed was described as the first embodiment, and the structure 3 in which the first base material 31 and the second base material 32 as two plate-like members are fixed was described as the second embodiment.
  • the present invention is not limited to the first embodiment and the second embodiment.
  • the members to be fixed may have any shapes.
  • the members to be fixed are not limited to two members, and may be three or more members.
  • the structure 1 , the structure 3 , and the structure 4 , the press machine 2 and the press machine 2 ′, and the method of fixing using these, of the first embodiment and the modification example 1 and the second embodiment and the modification example 2 according to the present invention have been described in detail with reference to the drawings, but the specific configuration is not limited to these embodiments and the modification examples thereof, and the present invention includes a design change or the like without departing from the scope of the present invention.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Insertion Pins And Rivets (AREA)
  • Connection Of Plates (AREA)
  • Forging (AREA)
  • Cooling Or The Like Of Electrical Apparatus (AREA)
US18/992,731 2022-10-21 2022-10-21 Fixed structure, fixing method, and fixing device Pending US20260001120A1 (en)

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PCT/JP2022/039318 WO2024084689A1 (ja) 2022-10-21 2022-10-21 固着された構造体、固着方法及び固着装置

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JPS494267A (https=) * 1972-04-06 1974-01-16
JPS5955283U (ja) * 1982-10-05 1984-04-11 松下電器産業株式会社 放熱器
JPH04237536A (ja) * 1991-01-17 1992-08-26 Press Kogyo Kk リベット締結方法
JPH0555769A (ja) * 1991-01-25 1993-03-05 Fuji Xerox Co Ltd プリント基板
JP2009115314A (ja) * 2007-10-17 2009-05-28 Univ Of Ryukyus リベット穴のき裂抑制方法
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CN119365694A (zh) 2025-01-24
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JPWO2024084689A1 (https=) 2024-04-25

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