JP2019000897A - Metal plate caulking-joined structure, and joining method - Google Patents

Abstract

To provide metal plate caulking-joined structure and a metal plate joining method, each enabling metal plates to be joined together in such a manner that surfaces of the joined metal plates continue upon joining of the metal plates.SOLUTION: A caulking-joined structure in an end or an edge of a metal plate is provided in which: any end or edge joined by the caulking is formed as a male side joining part with a projection piece projecting in the width direction; the other end or the edge where the male side joining part is caulked and joined is formed as a female side joining part with a recess or a hole part for receiving the projection piece; the projection piece of the male side joining part received in the recess or the hole part of the female side joining part is caulked in a direction intersecting the thickness direction of the projection piece; and thereby the caulking-joined structure of the metal plate rolled in the circumference of the recess or the hole part of the female side joining part is formed.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a caulking and joining structure for metal sheets and a joining method. In particular, the present invention relates to a caulking joining structure and an joining method at an end or an edge of a metal plate material.

  Conventionally, for joining plate members made of metal, in addition to welding, brazing, soldering, and the like, caulking is also used. This caulking process is a structure in which a part of metal parts is joined by plastic working, and the joining structure is devised according to the application and is diverse. And several techniques have been proposed for metal joining by caulking.

  For example, in Patent Document 1 (Japanese Patent Laid-Open No. 9-314255), as a method of fixing a metal member that can be fixed by caulking without generating metal powder, one end of a first metal member is used as a second metal member. The metal member is fixed by caulking and fixing the first metal member to the second metal member by plastic deformation of the end surface of the one end protruding from the through hole by caulking punch after being inserted into the through hole provided in In the method, the caulking punch has a tip portion formed in a conical shape, and a method of fixing a metal member that is plastically deformed by moving a specific portion of the circumferential surface of the cone along the end surface of the one end portion while rolling. Proposed.

Further, in Patent Document 2 (Japanese Patent Application Laid-Open No. 2004-243519), a plurality of first and first crossings that intersect with each other are formed in order to make the metal plates that intersect in a lattice shape look good and are firmly connected with good workability. In the grid-like connection method of metal plates in which two metal plates are fitted and connected in a lattice shape, the edge of at least one metal plate of the first and second metal plates is the edge of the other metal plate. And a fitting groove that sandwiches the other metal plate from both sides thereof, and an opening end of the fitting groove when the one metal plate is fitted on the plate surface of the other metal plate. And a plurality of the one metal plates are fitted into the other metal plate by the fitting grooves and assembled in a lattice shape, and the plurality of the one metal plates are assembled. A plurality of the above-mentioned one metal plates on the edge close to the opening end of the fitting groove A metal plate that simultaneously press-fits all the caulking blades of all lengths, deforms the edge and bites into the recess, and simultaneously firmly and caulkingly bonds the one metal plate to the other metal plate. A grid-like connection method has been proposed.

JP 9-314255 A JP 2004-243519 A

  As described above, metal bonding by caulking has been performed in the past. However, the technique of Patent Document 1 requires passing one end of the iron core through the yoke through-hole and crimping the one end of the iron core in the width direction, and is not suitable for joining plate members. It was. Moreover, although the technique of the said patent document 2 joins the edge parts of a metal plate material, the surfaces in the board | plate material to join are not continuous.

  Then, this invention makes it a subject to provide the crimping joining structure of the metal plate material which can be joined so that the surface of the plate materials to join may be continued, and the joining method of a metal plate material.

  Moreover, since the technique of the said patent document 1 crimps the one end part of an iron core in the width direction, the big force was required for crimping.

Accordingly, another object of the present invention is to provide a metal plate material crimping and joining structure and a metal plate material joining method that can be reliably joined while being capable of being crimped with as little force as possible.

  In order to solve at least one of the above-described problems, in the present invention, a metal plate material caulking joint structure and a metal plate material joining method in which a metal plate material joint is caulked in a direction crossing the thickness direction of the plate material I will provide a.

  That is, in the present invention, a caulking joining structure at an end or an edge of a metal plate material, and any end or edge to be joined by caulking has a protruding piece projecting in the width direction. The other end or edge portion, which is formed as a joint portion and the male side joint portion is caulked and joined, is formed as a female side joint portion provided with a recess or hole that receives the protruding piece. The protruding piece of the male-side joint received in the recess or hole of the female-side joint is crimped in a direction intersecting the thickness direction of the protruding piece, and the concave of the female-side joint Or the crimping joining structure of the metal plate material currently rolled around the hole part is provided.

  In such a metal plate joining method of the present invention, a recess or a hole is formed on the inner wall surface on the side where the protruding portion of the male joint is rolled by caulking in the recess or hole formed in the female side joint. A retaining portion protruding toward the inside of the portion can be formed.

  Further, in the caulking and joining structure of the metal plate material of the present invention, in the recess or hole formed in the female side joint, the protrusion of the male side joint is around the recess or hole on the side rolled by caulking. Can be formed with a recess or hole for receiving the rolled protrusion.

  The present invention also provides a method for joining metal plate materials in connection with the caulking and joining structure for the metal plate materials.

  That is, the metal plate material joining method by the caulking joint structure of the metal plate material according to the present invention, including a bending step of bending the metal plate material in the thickness direction, the male side joint and the female side joint Are formed at opposite edges by bending, and the protruding piece of the male joint is received in the recess or hole of the female joint by the bending step, and the female joint The projecting piece of the male side joint received in the recess or hole of the part is crimped in a direction intersecting the thickness direction of the projecting piece and rolled around the recess or hole of the female side joint Provided is a method for joining metal sheets including a caulking process.

In such a metal plate joining method, the bending process can be performed by a mold press process, and the caulking process can be performed by a mold in the mold press process.

  According to the caulking and joining structure of the metal plate material and the method of joining the metal plate material of the present invention, the caulking and joining structure of the metal plate material that can be joined so that the surfaces of the joining plate materials are continuous, A method for joining metal sheets can be provided.

  Further, according to the above-described caulking joining structure for metal plates and the joining method for metal plates according to the present invention, the caulking joining structure for metal plates that can be reliably joined while being caulked with as little force as possible, and the metal plate A bonding method can be provided.

The process figure which forms the caulking joining structure of the metal plate material concerning 1st Embodiment. The process figure which shows the crimping joining structure of the metal plate material concerning 2nd Embodiment, and the joining method of a metal plate material. The process figure which shows the crimping joining structure of the metal plate material concerning 3rd Embodiment, and the joining method of a metal plate material. Process drawing which shows the crimping joining structure of the metal plate material concerning the 4th Embodiment, and the joining method of a metal plate material. Process drawing which shows the caulking joining structure of the metal plate material concerning 5th Embodiment, and the joining method of a metal plate material. The exploded perspective view at the time of the bending process of a metal plate material. The process figure which shows the joining method which performs a bending process and a series of joining processes of a metal plate material. The disassembled perspective view at the time of the bending process of (A) metal plate material which used another female type metal mold | die, (B) Side view.

  Hereinafter, a caulking and joining structure for metal plates and a method for joining metal plates according to the present embodiment will be specifically described with reference to the drawings.

  FIG. 1 is a process diagram for forming a caulking and joining structure for metal sheets according to the first embodiment. In the caulking and joining process according to this embodiment, the male side joint 10 and the female side joint 11 are formed in the part to be joined. The part to be joined, that is, joining of the metal plate members includes joining different metal plate members together and joining portions of one metal plate member. Therefore, in addition to the case where parts or products are manufactured by joining ends or edges of a plurality of plate members, the case where parts or products are manufactured by joining any end portions or edges of one plate member is also included. Further, the plate material provided with the male-side joint portion 10 to be joined and the plate material provided with the female-side joint portion 11 may be formed of different materials in addition to the same material. Therefore, for example, even plate materials made of different metals can be joined by the joining structure according to the present embodiment. However, since the protruding piece 12 included in the male side joint portion 10 needs to be crimped at the time of joining, it is desirable that at least the plate material on which the male side joint portion 10 is provided is made of metal. On the other hand, the plate material on which the female side joint portion 11 is provided may be any material such as resin, ceramics, wood, etc., as long as it can withstand the force during caulking. Moreover, each board | plate material joined may be different heat other than the same thickness.

  In this embodiment, one end portion (but may be an edge portion) of the joining portion of the plate material is recessed in a groove shape to form the recess 13 constituting the female side joining portion 11. In particular, the concave portion 13 in the first embodiment has a side surface that exists in a direction in which a protruding piece 12 to be described later is swaged, by tilting the opening side so as to enter the inside of the concave portion 13, thereby preventing the retaining portion 15. The space of the recess 13 is formed so that the opening width (opening width in a direction perpendicular to the thickness direction of the plate) is narrowed toward the opening 14 side (end portion or edge side) by the retaining portion 15 formed. Is formed.

  A protruding piece 12 having a shape to be received in the recess 13 is formed at the other joining portion joined to the female side joining portion 11 to form a male side joining portion 10. As shown in FIG. 1A, the male side joint portion 10 is formed in the same shape as the concave portion 13, and the side surface on the caulking direction side is formed in a wedge shape.

  And the said male side junction part 10 is inserted in the female side junction part 11 (FIG.1 (B)). At this time, since the protruding piece 12 protrudes longer than the plate thickness of the plate material on which the female side joint portion 11 is formed, the protruding piece 12 is connected to the female side joint as shown in FIG. It can be present protruding from the outer surface 16 of the part 11.

  In this state, as shown in FIG. 1 (C), by caulking the portion protruding from the female joint 11 toward the upper side of the drawing (that is, in the direction crossing the plate thickness of the protruding piece 12), The crimped protruding piece 12 covers the outer surface 16 of the female-side joint 11 beyond the concave portion 13 of the female-side joint 11, thereby realizing the joining of both parts. That is, by this caulking method, it is possible to realize a caulking joining structure for metal plates and a joining method for metal plates that can be joined such that the surfaces of the joined plates are continuous.

  In particular, in the joint portion according to the present embodiment, the plate material in which the female side joint portion 11 is formed is prevented from coming off in the thickness direction by the crimped protruding piece 12, while the male side joint portion 10 is formed. The removal of the plate material in the plate thickness direction is prevented by the retaining portion 15 formed in the concave portion 13 of the female side joint portion 11. Therefore, according to the joint structure according to the present embodiment, it is possible to reliably maintain the bonding without detaching or coming off due to movement or an impact during use by crimping after combining the plate members. A junction structure can be realized.

  And, in the joining structure according to the present embodiment, since it is crimped in the direction crossing the plate thickness, it can be crimped without difficulty with less force than when crimping in the width direction of the end face of the protruding piece 12. Can do. In particular, if the thickness of the plate material on which at least the male-side joint portion 10 is formed is 0.3 mm or more and 5 mm or less, preferably 0.5 mm or more and 3 mm or less, the caulking process is performed simultaneously with the press bending process described later. be able to.

  However, in the joining structure in the first embodiment, the protruding piece 12 in the male side joining portion 10 can be formed so as to be different from the shape of the recessed portion 13. FIG. 2 is a process diagram illustrating a caulking joining structure for metal plates and a joining method for metal plates according to the second embodiment. In particular, in the joining structure shown in this embodiment, the protruding part in the male side joining part 20 is formed so as to project into a rectangle. In particular, the protruding piece 22 is inserted from the opening side of the recess 23 by making the width (S2) of the protruding portion smaller than the opening diameter (S1) of the portion where the retaining portion 25 is formed in the opening 24. It is also possible to do. Even in such a case, the protruding length of the protruding piece 22 needs to be formed so as to protrude from the outer surface 26 of the female-side joint portion 21 beyond the concave portion 23 (see FIG. 2 (B)). Then, as shown in FIG. 2C, the projecting piece 22 is plastically deformed into the gap between the recessed portion 23 and the projecting piece 22 by caulking the projecting piece 22 in the direction intersecting the thickness direction of the plate material. Since it enters and further covers the outer surface of the female-side joint 21, a joint structure that does not come out in any direction can be formed as in the joint structure shown in the first embodiment. .

  FIG. 3 shows a caulking and joining structure for metal plates and a joining method for metal plates according to a third embodiment related to the caulking and joining structure for metal plates and the joining method for metal plates according to the first embodiment. It is process drawing shown. In particular, in the caulking and joining structure for a metal plate material according to this embodiment, an embodiment is shown in which the plastically deformed portion of the caulking projection is configured not to protrude from the outer surface of the female side joining portion 31. That is, the female-side joint portion 31 according to this embodiment is provided around the concave portion 13 or the hole portion on the side where the protruding piece 32 of the male-side joint portion 30 is rolled by caulking in the concave portion 33 or the hole portion. A recess (or hole) 37 for receiving the rolled protruding piece 32 is formed. In particular, in the present embodiment, the recess 37 for receiving the rolled protruding piece 32 is formed, and the plastically deformed protruding piece 32 is received in the recess 37, so that it is added even after joining. It is possible to realize a caulking and joining structure of a metal plate material in which the protruding amount of the tightened protruding piece 32 is reduced. In addition to forming the recess 37 by cutting, it can also be formed by pressing, particularly pressing when the plate material is punched. In FIG. 3, members having the same functions as those in FIG. 1 are indicated by adding 20 to the reference numerals.

  FIG. 4 relates to the first embodiment, and shows a metal plate caulking joint structure and a metal plate joining method according to a fourth embodiment in which the shape of the recess 43 and the shape of the protruding piece 42 are changed. . That is, in the joint structure according to this embodiment, the concave portion 43 formed in the female side joint portion 41 dents the inner wall surface on the side on which the protruding piece 42 is rolled by caulking, thereby opening the concave portion 43. A retaining portion 45 protruding to the side is formed. As shown also in the fourth embodiment, it is desirable that the recess 43 formed in the female side joining portion 41 is formed with a retaining portion 45 so that at least the opening side at the end portion or edge portion of the plate material is narrowed. . By forming the retaining portion 45, not only the female side joint portion 41 but also the male side joint portion 40 can be prevented from coming out of the joint portion.

  On the other hand, when the retaining portion 45 is not formed, the coupled state is held by the crimped portion of the protruding piece 42. As a result, it is possible to prevent extraction of the plate material on which the female side joint 41 is formed. Therefore, the retaining portion 45 can be arbitrarily formed according to the necessity of preventing the plate material forming the male side joint portion 40 from slipping out. In FIG. 4, members having the same functions as those in FIG. 1 are indicated by adding 30 to the reference numerals.

  FIG. 5 shows a caulking joining structure for a metal plate material and a joining method for the metal plate material according to the fifth embodiment in which a hole 53 is formed in the female side joining portion 51. In other words, the female side joint 51 according to this embodiment is formed with a hole 53 into which the protruding piece 52 formed in the male side joint 50 is inserted. In the present embodiment, the hole 53 is formed as a square hole (FIG. 5A), but other shapes may be used, and may be changed as appropriate in relation to the end face shape of the projecting piece 12. Can do. In the present embodiment, since the male-side joint portion 50 is formed with a protruding piece 52 that protrudes in a cubic shape, the hole portion 53 is formed as a square hole that can accommodate this. When the plate members are joined, the protruding piece 52 of the male side joint portion 50 is inserted into the hole 53 of the female side joint portion 51 (FIG. 5B) and protrudes from the outer surface 56 of the female side joint portion 51. The portion that is present is crimped in a direction that intersects the thickness direction of the plate (FIG. 5C). As a result, the protruding piece 52 covers the outer surface of the female joint 51 beyond the hole 53, thereby realizing the joint between the two.

  As shown in the fifth embodiment, when the hole 53 is formed in the female side joint 51, the protruding piece 52 inserted into the hole 53 does not come out. There is no need to form. However, when the projecting piece 52 is caulked, the retaining portion can be formed on the inner wall surface of the hole 53 for the purpose of concentrating the caulking force in an arbitrary region. That is, if the protruding piece 52 of the male side joint 50 is formed by inclining the inner wall surface on the side to be rolled by caulking, the force during caulking can be concentrated, and thereby the caulking force Can be doubled. In FIG. 5, members having the same functions as those in FIG. 1 are indicated by adding 40 to the reference numerals.

  In the above embodiment, the state of joining two plate materials is described as an example, but this may be joining of two portions of one member. Moreover, although the example which formed one set of the combination of the protrusion piece and the recessed part (or hole part) in each junction part is shown, 2 or more sets can also be formed in each junction part, and each protrusion piece and recessed part ( Alternatively, the size and shape can be varied for each combination of holes).

  And the above-mentioned caulking joining structure and joining method can also be implemented in a series of operation | movement in the bending process of a metal plate material.

  FIG. 6 is an exploded perspective view at the time of bending a metal plate material, and FIG. 7 is a process diagram showing a joining method in which the metal plate material is bent and joined in series. In particular, the bending process according to this embodiment shows a joining method in which the joint portions facing each other are caulked and joined in a series of flows obtained by bending a metal plate material.

  That is, in this embodiment, a metal plate material joining method by a caulking joint structure of metal plate materials, including a bending step of bending the metal plate material in the thickness direction, the male side joint 10 and the female side The joint portion 11 is formed at each edge portion facing each other by bending. Through the bending step, the protruding piece 12 of the male side joint 10 is received in the recess 13 (or hole) of the female side joint 11. Then, in the caulking step subsequent to the bending step, the protruding piece 12 of the male side connecting portion 10 received in the concave portion 13 (or hole) of the female side connecting portion 11 intersects the thickness direction of the protruding piece 12 This is a method for joining metal plate members, which includes a bending / caulking step of a metal plate that is crimped in a direction to be rolled and rolled around the recess 13 or the hole of the female side joining portion 11.

  It is possible to perform the bending process and the caulking process in separate processes, and take out the workpiece to be bent from the processing machine and the like, and then perform the process in the caulking apparatus or the tool. Performs both in a series of actions. Therefore, in this embodiment, as shown in FIGS. 6 and 7, it is preferable that the bending process is performed by a mold press process, and the caulking process is performed by a mold in the mold press process.

  That is, as shown in FIG. 6, the metal plate material 60 to be processed is placed on the female mold 61 in which the accommodating portion 62 for bending the metal plate material is formed. The metal plate material 60 can be formed by pressing or cutting, and at least has a hardness and thickness that can be bent by pressing. In the present embodiment, the metal plate material 60 is formed so as to be bent to form a box, and includes a rectangular bottom plate constituent portion 60a and a side wall constituent portion 60b protruding in four directions of the bottom plate constituent portion 60a. It has become. Each side wall component 60b is formed with the protruding piece 12 and / or the recess 13 (or hole). In the present embodiment, the same protruding piece 12 and / or recess 13 (or hole) are formed in the side wall constituting portion 60b that is opposed via the bottom plate constituting portion 60a. However, the projecting pieces 12 and / or the recesses 13 (or holes) corresponding to each other need only be present at the edges facing each other by the bending process, and are formed in different shapes and / or different sizes for each combination. You can also.

  In the present embodiment, as described above, the same protruding piece 12 and / or recess 13 (or hole) are formed in the side wall constituting portion 60b facing each other via the bottom plate constituting portion 60a. By arranging in this way, as shown in FIG. 8 to be described later, the protruding piece 12 can be reliably inserted into the recess 13 (or hole) by adjusting the folding timing of each side wall component 60b. become.

  The metal plate 60 configured as described above is installed on the female die 61, and the bottom plate constituting portion 60a is pressed with the male die 65, so that bending can be performed. The female mold 61 and the male mold 65 can be manufactured by a conventional method.

  Next, with reference to FIG. 7, the bending and joining process of the metal plate material 60 according to this embodiment will be described in order. In FIG. 7, a female mold 61 is shown in a cross-sectional view for easy understanding. First, the object to be processed (metal plate material 60) formed by punching or cutting with a press as described above is placed on the female die 61 (FIG. 7A). Then, by pushing the bottom plate component 60a with the male mold 65, the object to be processed is sandwiched between the male and female molds and bent (FIG. 7B). As the bending process proceeds, the protruding pieces 12 and / or the recesses 13 (or holes) formed in the side wall components 60b are fitted, that is, the protrusions are inserted into the recesses 13 (or holes). (FIG. 7C). At this time, the protruding piece 12 exists in a state of protruding from the recess 13 (or hole). Further, by pushing the male mold 65 into the female mold 61, the protruding piece 12 existing in the protruding state hits the upper surface of the female mold 61 and is crimped by the upper surface of the female mold 61. It is deformed (FIG. 7D). As a result, the protruding piece 12 is plastically deformed so as to cover the outer side surface 16 of the female side joint portion, thereby preventing the female side joint portion 11 from coming out. When the male die 65 is retracted and the workpiece is taken out from the female die 61, a processed product that has been completed up to caulking and joining is produced by a single press for performing the bending process. (FIG. 7E).

  Therefore, in order to carry out such a bending / joining process, the opening 62 of the male / female mold is used to move the object to be processed to the depth at which the protruding piece 12 and / or the recess 13 (or hole) is formed. It is desirable to form it so that it can be accommodated, and it is desirable to form it so that it does not press beyond the formation position of the protruding piece 12 and / or the recess 13 (or hole).

  8A and 8B are an exploded perspective view and a side view, respectively, of (A) a metal plate material during bending using another female mold 61. The bending / bonding processing of the metal plate material shown in this figure is an embodiment particularly for more accurately performing the engagement of the protruding piece 12 and / or the recess 13 (or hole).

  That is, in the present embodiment, the upper end of the accommodating portion 62 formed in the female mold 61 is the bent edge of the side wall constituting portion 60b provided with the female side joint portion 11 in which the concave portion 13 (or hole portion) is formed. 63 is formed to be one step lower than the bent edge 64 of the side wall constituting portion 60b including the male side joint portion 10 on which the protruding piece 12 is formed. As a result of forming in this way, as shown in FIG. 8 (B), the side wall component 60b on which the protruding piece 12 is formed is bent first at the beginning of the bending process, and the height H corresponding to this is formed. Just get up first. Then, the side wall constituting portion 60b in which the concave portion 13 (or the hole portion) is formed can be bent up to follow this up. As a result, the recess 13 (or the hole) formed in the side wall component 60b that has risen later enters the protruding piece 12 formed in the side wall component 60b that has been raised after the bending process is completed. Thus, the engagement between the projecting piece 12 and the recess 13 (or the hole) can be ensured. Thereafter, bending and joining can be performed by one press for performing the bending step by the operations shown in FIGS.

  Therefore, as described above, the projecting piece 12 of the male joint 10 is crimped in a direction intersecting the thickness direction of the metal plate material (preferably a direction perpendicular to the metal plate material), thereby performing the bending and joining process once. It can be done by processing.

  And the fracture strength of the caulking joint structure formed in this way can be made stronger than in the case of only bending. For example, when a metal plate material having a thickness of 1.0 mm is used for simple bending, the fracture strength due to immediate deformation cannot be measured, but this embodiment is applied. When bending / bonding (plate thickness: 1.0 mm) was performed, the length (capping allowance) covering the outer surface of the female-side joint portion 11 when crimped was 2020N when it was 0.5 mm. This value confirmed that the strength of the joint structure was improved in this embodiment, considering that the fracture strength when point welding was performed after bending was 3440N.

Moreover, according to the bending and joining process concerning this embodiment, the welding process after a bending process can be skipped. As a result, it becomes possible to manufacture without having a skilled welding engineer, and the construction period can be shortened. Further, since there is no need to provide a welded portion, there is no fear of deteriorating the rust preventive process such as the rust preventive paint, and the use durability can be improved.

The caulking and joining structure and joining method for metal plates of the present invention can be used not only in the joining process of metal plates but also in various fields such as joining of metal plates and other members.

10, 20, 30, 40, 50: Male side joint
11, 21, 31, 41, 51: Female joint
12, 22, 32, 42, 52: Protruding piece
13, 23, 33, 43: Recess
53: Hole
14, 24, 34, 44: Opening
16, 26, 36, 46, 56: Outer side
60: Metal plate
60a: Bottom plate component
60b: Side wall component
61: Female mold
62: Mold receiving part
65: Male mold

Claims (5)

It is a caulking joint structure at the end or edge of a metal plate material,
Any end or edge to be joined by caulking is formed as a male-side joint with a protruding piece protruding in the width direction,
The other end or edge to which the male side joint is crimped is formed as a female side joint having a recess or hole for receiving the protruding piece,
The protruding piece of the male-side joint received in the recess or hole of the female-side joint is crimped in a direction intersecting the thickness direction of the protruding piece, and the concave of the female-side joint or A caulking and joining structure for a metal plate, which is rolled around a hole.
On the inner wall surface on the side where the protruding portion of the male side joint portion is rolled by caulking in the concave portion or hole portion formed in the female side joint portion, a retaining portion that protrudes toward the inside of the concave portion or hole portion The caulking and joining structure for metal sheets according to claim 1, wherein:
In the recess or hole formed in the female side joint, a recess that receives the rolled protrusion is provided around the recess or hole on the side where the protrusion of the male side joint is rolled by caulking. Or the caulking joining structure of the metal plate material of Claim 1 or 2 in which the hole is formed.
A metal plate material joining method by a caulking joint structure for a metal plate material according to any one of claims 1 to 3,
Including a bending step of bending the metal plate in the thickness direction,
The male side joint part and the female side joint part are respectively formed on edges facing each other by bending,
Through the bending step, the protruding piece of the male side joint is received in the recess or hole of the female side joint,
Clamping the protruding piece of the male-side joint received in the recess or hole of the female-side joint in a direction crossing the thickness direction of the protruding piece, the recess or hole of the female-side joint The joining method of a metal plate material characterized by including the crimping process rolled to the circumference | surroundings.
The bending process is performed by die pressing,
The said crimping process is a joining method of the metal plate material of Claim 4 performed by the metal mold | die in the said metal mold | die press work.