JP2010240678A - Plate laminated structure, plate reinforced structure, plate connected structure, and plate lamination method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a plate lamination method which comprises stacking plates different from each other in a material grade on top of each other and joining the plates to each other by spot welding. <P>SOLUTION: A second plate material 2 and a third plate material 3, which can be spot-welded to a first plate material 1, are superimposed respectively on both surfaces of the first plate material 1. The first plate material 1 is formed of a material different from a material, of which the second and third plate materials are formed, and has a positioning hole 4. A positioning protrusion 5 corresponding to the positioning hole 4 in the first plate material 1 is formed in at least one of the second plate material 2 and the third plate material 3. The positioning protrusion 5 is fitted into the positioning hole 4 in the first plate material 1, and the second plate material 2 and the third plate material 3 are spot-welded to the first plate material 1 at the positioning protrusion 5 fitted into the positioning hole 4 in the first plate material 1. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a plate lamination structure, a plate reinforcement structure, a plate connection structure, and a plate lamination method using spot welding.

Spot welding is widely used for welding steel materials. Recently, in order to use lightweight materials such as aluminum from the viewpoint of reducing the weight of machinery and equipment, it is an attempt to join two plates of different materials by spot welding. Has been made. For example, Patent Document 1, a galvanized steel sheet and the aluminum plate by spot welding, to form a Al ₅ Fe ₂ based compound layer on the steel sheet side of the bonding interface, form Al 3 _Fe-based compound layer on the aluminum plate side It is described to do. However, such intermetallic compounds are generally known to be brittle.

  On the other hand, an aluminum plate is sandwiched between two steel plates and stacked in three layers, this overlapping portion is sandwiched between a pair of electrodes, and a large current is allowed to flow between both electrodes for a short time while applying pressure. Attempts have also been made to directly spot weld two steel plates by excluding the melted portion of the aluminum plate in the spot welding region (see Patent Documents 2 and 3). In addition, a hole is formed in the aluminum plate in advance, and a rivet-shaped fastening tip is inserted into the hole and brought into contact with the steel plate. In this state, the head of the fastening tip and the steel plate are sandwiched between a pair of electrodes and energized. By doing so, it is also known to weld the fastening tip and the steel plate, thereby fastening the aluminum plate and the steel plate (see Patent Document 4).

JP 2007-260777 A JP 09-85454 A JP 2003-236673 A JP 2003-145279 A

  However, the method in which the aluminum plate between the two steel plates is partially melted and eliminated by spot welding has a problem that the molten aluminum liquid scatters around from the gap between the steel plate and the aluminum plate. Furthermore, there is also a problem that a part of aluminum remains between the two steel plates to cause a decrease in bonding strength. Further, such a spot welding method can be applied to sandwich a metal plate such as aluminum between two steel plates, but can be applied to sandwich a non-conductive plastic plate. Can not.

  Further, in the method of fastening the aluminum plate and the steel plate by welding the fastening tip to the steel plate, when it becomes a large plate material, a large number of fastening tips are required for the fastening, and the number of parts is increased. The operation of fitting the fastening tip into the hole in the aluminum plate is also troublesome.

  Therefore, the present invention enables not only the lamination of metal plates but also the lamination of a metal plate and a non-conductive plate such as plastic to be easily performed by spot welding.

  In order to solve the above problems, the present invention sandwiches an intermediate plate material between two plate materials that can be spot welded, and an intermediate positioning protrusion provided on at least one of the two plate materials. It was fitted in the positioning hole of the plate material and welded to the other plate material.

That is, the means for solving the above-described problem is that the second plate material and the third plate material that can be spot welded to each other are laminated on both surfaces of the first plate material composed of one plate or a plurality of stacked plates. Plate stacking structure,
The first plate material is formed of a material different from the second plate material and the third plate material, has at least one positioning hole, and the second plate material and the third plate material are Not joined,
Said at least one of the second plate member and the third plate member is for the first plate member to one of the plate member said to block the displacement position corresponding to the positioning holes of the first plate member Positioning protrusions are formed,
The positioning protrusion is fitted into the positioning hole of the first plate material,
The second plate material and the third plate material are welded by spot welding at at least one positioning projection fitted in the positioning hole of the first plate material.

  Accordingly, the second plate material and the third plate material are directly welded through the positioning hole of the first plate material, and the first plate material of different quality is not interposed at all in the welded portion, so that the welding strength is high. As a result, the bonding of the three plate materials is strengthened. Moreover, the fitting between the positioning holes of the first plate material and the positioning projections of the second plate material or the third plate material prevents positional displacement between the plate materials, which is advantageous for assembling the plate materials before welding. Become.

  As for the material of the first to third plate materials, for example, the first plate material can be an aluminum material (including an aluminum alloy), and the second plate material and the third plate material can be made of steel. However, since the second plate material and the third plate material are welded through the positioning holes of the first plate material, the first plate material itself does not need to have conductivity, and is non-conductive such as plastic. These plates can also be used as the first plate material.

  A particularly characteristic point of the means is that the second plate material and the third plate material are directly welded with the first plate material in between, using positioning holes and positioning projections for assembling the plate materials. It was to let you. Therefore, as described above, it is advantageous for positioning and holding the plate material at the time of spot welding, and a strong plate laminated structure can be obtained without using a fastening member such as a screw, and the non-conductive plate material. Can also be laminated.

  There may be at least one set of the positioning hole and the corresponding positioning projection. When only one set of positioning holes and positioning protrusions is used, the cross section of the positioning holes and positioning protrusions is elliptical to prevent relative rotation between the first plate material and the second plate material or the third plate material. It is preferable to use a non-round shape such as a shape. When a plurality of sets of positioning holes and positioning protrusions are provided, the relative rotation can be prevented even if the shape is a perfect circle. Even when a plurality of sets of positioning holes and positioning protrusions are provided, the second plate material and the third plate material may be welded at at least one positioning protrusion.

  The positioning projection corresponding to one positioning hole of the first plate material may be provided on only one of the second plate material and the third plate material, or on both the second plate material and the third plate material. You may make it provide. In the latter case, the positioning projections of the second plate material and the positioning projections of the third plate material are fitted into the positioning holes of the first plate material from opposite sides and are welded in the positioning holes. Further, the first plate material may be constituted by one plate, but may be constituted by overlapping a plurality of plates.

One of the preferred embodiments of the above solution is that a first plate material composed of one plate or a plurality of stacked plates is reinforced by a second plate material and a third plate material that can be spot welded to each other. Plate reinforcement structure,
The first plate material is made of a material different from the second plate material and the third plate material, has a plurality of positioning holes, and is joined to the second plate material and the third plate material. Not
At least one of the second plate material and the third plate material is provided with a plurality of positioning holes of the first plate material so that the first plate material does not shift relative to the one plate material. A plurality of corresponding positioning protrusions are formed,
The plurality of positioning protrusions fit into corresponding positioning holes of the first plate material,
The second plate material and the third plate material are welded by spot welding at at least one positioning projection fitted in the positioning hole of the first plate material.

  Also in this plate reinforcing structure, the relationship between the first to third plate materials is the same as that of the above-mentioned plate laminated structure, and the same effect as that of the plate laminated structure can be obtained. It can be the same as the plate laminated structure.

  And according to the said plate reinforcement structure, since the 2nd plate material for reinforcement and the 3rd plate material of a material different from the 1st plate material are combined, the connection is performed by spot welding, There is no need to use a fastening member such as a screw. Moreover, since the second plate material and the third plate material are directly welded with the first plate material sandwiched therebetween, the coupling of the second and third plate materials to the first plate material becomes strong. .

  In this case, for example, the surface strength of the first plate material can be increased by using the second plate material and the third plate material as rib plates, or local reinforcement of the first plate material by the second plate material and the third plate material. Can be achieved.

In another preferred aspect of the above solution, two first plate members each consisting of a single plate or a plurality of stacked plates are connected to each other by a second plate material and a third plate material that are spot weldable. Plate connection structure,
Each of the two first plate members is made of a material different from the second plate member and the third plate member, has a plurality of positioning holes at each end, and the second plate The material and the third plate material are not joined,
Each of the second plate material and the third plate material is overlapped from both surfaces of the two first plate materials so as to straddle both ends of the two first plate materials,
At least one of the second plate material and the third plate material has the two first plate materials so that the two first plate materials are not displaced relative to the one plate material. A plurality of positioning projections corresponding to each of the plurality of positioning holes are formed,
The plurality of positioning protrusions fit into corresponding positioning holes in each of the two first plate members,
The second plate material and the third plate material are welded by spot welding at at least one positioning projection fitted in the positioning hole of each of the two first plate materials.

  In this plate connection structure, the relationship between the first to third plate materials is the same as that in the plate lamination structure, and the same operation and effect as the plate lamination structure can be obtained. It can be the same as the plate laminated structure.

  Thus, according to the plate connection structure, the second plate material and the third plate material, which are different from the first plate material, are used for connecting the two first plate materials. The connection can be performed by spot welding without using a fastening member such as. Moreover, since the second plate material and the third plate material can be strongly bonded by direct welding with the first plate material sandwiched therebetween, as a result, the two first plate materials are strongly bonded to each other. You will be able to connect.

Still another preferable aspect of the above solution is a third plate in which a first plate material and a second plate material comprising one plate or a plurality of stacked plates can be spot-welded to the second plate material. A plate connection structure connected by a material,
The first plate material is formed of a different material from the second plate material and the third plate material, has a plurality of positioning holes at the end thereof, and is joined to the third plate material. Not
The second plate material is overlapped with an end portion of the first plate material having a plurality of positioning holes,
The third plate material is stacked from the side opposite to the second plate material with respect to the end portion having the positioning hole of the first plate material,
At least one of the second plate material and the third plate material is provided with a plurality of positioning holes of the first plate material so that the first plate material does not shift relative to the one plate material. A plurality of corresponding positioning protrusions are formed,
The plurality of positioning protrusions fit into corresponding positioning holes of the first plate material,
The second plate material and the third plate material are welded by spot welding at at least one positioning projection fitted in the positioning hole of the first plate material.

  In this plate connection structure, the relationship between the first to third plate materials is the same as that in the plate lamination structure, and the same operation and effect as the plate lamination structure can be obtained. It can be the same as the plate laminated structure.

  And according to the said plate connection structure, the 1st plate material and the 2nd plate material of a material different from this 1st plate material are connected by spot welding, without using fastening members, such as a screw. be able to. Moreover, since the second plate material and the third plate material can be strongly bonded by direct welding with the first plate material sandwiched therebetween, as a result, the first plate material and the second plate material The connection will be strong.

  The plate lamination structure, the plate reinforcement structure, and the plate connection structure can be obtained by executing the following plate lamination method.

That is, a plate laminating method of laminating a second plate material and a third plate material that can be spot welded to each other on both surfaces of a first plate material composed of one plate or a plurality of stacked plates,
The first plate material is formed of a material different from the second plate material and the third plate material, and is not joined to the second plate material and the third plate material,
In the first plate material, at least one positioning hole is formed,
It said at least one of the second plate member and the third plate member, for as the first plate member is not misaligned with respect to one of the plate member said, corresponding to the positioning holes of the said first plate member Forming a positioning projection to
The first plate material to the third plate material are stacked so that the positioning protrusions fit into the positioning holes,
The second plate material and the third plate material are welded by spot welding at at least one positioning protrusion fitted in the positioning hole of the first plate material.

  As described above, according to the present invention, using the positioning holes and positioning projections for assembling the plate materials, the second plate material and the third plate material are sandwiched between the first plate material, Since direct welding is performed by spot welding, it is advantageous for positioning and holding the plate material during spot welding, and a strong plate laminated structure can be obtained without using a fastening member such as a screw. Conductive plate materials can also be laminated, which is advantageous for reinforcing the plate materials and connecting the plate materials.

It is a perspective view of the plate reinforcement structure concerning Embodiment 1 of the present invention. It is sectional drawing of the plate laminated structure of the same form. It is sectional drawing which shows the relationship between the 1st-3rd plate material of the same form and the electrode for spot welding. It is sectional drawing which shows the state in which the spot welding of the same form is performed. It is a perspective view which shows an example of the plate connection structure which concerns on Embodiment 2 of this invention. It is a perspective view which shows the other example of the plate connection structure which concerns on the same form. It is a perspective view which shows an example of the plate connection structure which concerns on Embodiment 3 of this invention. It is a perspective view which shows the other example of the plate connection structure which concerns on the same form. It is sectional drawing which shows the relationship between the 1st-3rd plate material of Embodiment 4 of this invention, and the electrode for spot welding. It is sectional drawing which shows the relationship between the 1st-3rd plate material of Embodiment 5 of this invention, and the electrode for spot welding.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. It should be noted that the following description of the preferred embodiment is merely illustrative in nature, and is not intended to limit the present invention, its application, or its use.

<Embodiment 1>
In the first embodiment, the present invention is applied to a plate reinforcing structure. In FIG. 1, 1 is a first plate material to be reinforced, 2 is a second plate material for the reinforcement, and 3 is a third plate material for the same reinforcement. The first plate material 1 is not joined to the second plate material 2 and the third plate material 3. The second plate material 2 and the third plate material 3 are made of metal (for example, steel) and can be spot welded to each other. In the case of this example, the 2nd plate material 2 and the 3rd plate material 3 are formed by the elongate plate in order to form the rib in the 1st plate material 1 and to aim at the reinforcement. Unlike the 2nd plate material 2 and the 3rd plate material 3, the 1st plate material 1 can be formed with lightweight alloys, such as an aluminum material, and a plastics, for example.

  The elongated second plate material 2 and the third plate material 3 are stacked on both surfaces of the first plate material 1 so as to correspond to each other, and a plurality of positions spaced in the plate longitudinal direction are positioned in the positioning holes of the first plate material 1. Are spot welded to each other. In FIG. 1, the site | part which gave x mark to the 2nd plate material 2 is a spot welding location.

  The plate laminate structure at the spot weld location is shown in FIG. That is, in the first plate material 1, positioning holes 4 penetrating the plate material are formed at a plurality of locations corresponding to respective positions where spot welding is to be performed. On the second plate material 2, positioning protrusions 5 corresponding to the plurality of positioning holes of the first plate material 1 are formed at a plurality of locations. The positioning hole 4 is formed as a long hole in the longitudinal direction of the second plate material 2 or the third plate material 3 as necessary, and the first plate material 1 and the second and third plate materials 2 and 3 are connected to each other. Make it possible to absorb the difference in thermal expansion.

  As shown in FIG. 3, the positioning hole 4 of the first plate material 1 is formed as a dish-like hole having a tapered inner surface. On the other hand, the positioning protrusions 5 of the second plate material 2 are formed by an overhanging process using a press and have a taper corresponding to the shape of the hole inner surface of the positioning hole 4. The positioning projection 5 of the second plate material 2 is fitted into the positioning hole 4 of the first plate material 1, and the tip end surface of the projection is welded by spot welding to the surface where the positioning projection of the third plate material 3 is not formed. Yes. In FIG. 2, 6 is a nugget by spot welding.

  In spot welding, as shown in FIGS. 3 and 4, the first to third plate members 1 to 3 are fitted into the positioning holes 5 of the first plate member 1 and the positioning projections 5 of the second plate member 2 are fitted. The third plate material 3 is stacked so as to come into contact. Due to the fitting between the positioning protrusion 5 and the positioning hole 4, the displacement between the first plate material 1 and the second plate material 2 is prevented, which is advantageous for the positioning and holding of the plate materials 1 to 3 during spot welding. become.

  And the part of the positioning protrusion 5 of the 2nd plate material 2 and the 3rd plate material 3 are pinched | interposed by a pair of electrodes 7 and 8, and it supplies with electricity between both electrodes. Thereby, the positioning projection 5 of the second plate material 2 and the third plate material 3 are directly welded without the first plate material 1 interposed therebetween, and the plate reinforcing structure shown in FIG. 1 is obtained.

  For example, when the first plate material 1 is made of aluminum and the second and third plate materials 2 and 3 are made of steel, the nugget 6 is formed by welding the steel materials. This nugget 6 does not contain any aluminum. That is, no brittle intermetallic compound is formed on the nugget 6. Therefore, the bonding strength between the second plate material 2 and the third plate material 3 is increased, and as a result, the laminated structure of the first to third plate materials 1 to 3 is also strong.

  In addition, since the positioning projection 5 of the second plate material 2 and the third plate material 3 are directly welded, the first plate material 1 can be formed of a nonconductive material such as plastic. Since the second plate material 2 and the third plate material 3 are joined with high strength, the laminated structure of the first to third plate materials 1 to 3 is also strong.

  As shown in FIG. 3, the diameter A of the bottom surface of the recessed portion 5a that is relatively recessed on the back surface side of the positioning projection 5 of the second plate material 2 and the tip diameter B of the electrode 7 applied to the bottom surface satisfy A> B. It is preferable to have a magnitude relationship. That is, the electrode 7 is prevented from contacting the side surface of the recess 5a. This is advantageous in reliably welding the second plate material 2 and the third plate material 3 while avoiding damage to the first plate material 1.

  The positioning projections 5 may be provided on either the second plate material 2 or the third plate material 3, and some positioning projections 5 are provided on the second plate material 2, and the remaining positioning projections 5 are provided on the second plate material 2. You may make it provide in 3 plate material 3. FIG. Furthermore, positioning protrusions can be provided opposite to both the second plate material 2 and the third plate material 3 (this point will be further described in the fourth and fifth embodiments).

  Further, it is not always necessary to perform spot welding on all the positioning protrusions 5. For example, several positioning protrusions 5 selected as appropriate may be spot-welded, for example, every other one.

<Embodiment 2>
In the present embodiment, the present invention is applied to a plate connection structure, an example of which is shown in FIG. That is, the two first plate materials 1 and 1 are connected by the elongated second plate material 2 and the third plate material 3 in a state where the end surfaces of the first plate materials 1 and 1 face each other. The first plate materials 1 and 1 are not joined to the second plate material 2 and the third plate material 3. As in the first embodiment, the second plate material 2 and the third plate material 3 are made of metal (for example, steel) and can be spot welded to each other. The first plate material 1 is different in material from the second plate material 2 and the third plate material 3, and can be formed of a lightweight alloy such as an aluminum material or plastic, for example.

  A plurality of positioning holes 4 are formed at intervals in the end portions of the first plate materials 1 and 1. The second plate material 2 is stacked on one side of the first plate materials 1 and 1 so as to straddle both the first plate materials 1 and 1, and the third plate material 3 is formed of the first plate materials 1 and 1. On the opposite surface, they are stacked so as to straddle both the first plate members 1, 1. The second plate material 2 and the third plate material 3 are joined by spot welding through the positioning holes 4 of the first plate material 1. In FIG. 5, the site | part which gave x mark to the 2nd plate material 2 is a spot welding location.

  The plate laminated structure of the spot welded portion is the same as that of the first embodiment, and as shown in FIG. 2, the positioning projection 5 formed on the second plate material 2 is fitted into the positioning hole 4 of the first plate material 1, It is welded to the third plate material 3 by a nugget 6. That is, a plurality of positioning protrusions 5 shown in FIG. 2 are formed on the second plate material 2, that is, formed in two rows corresponding to the positioning holes 4 of both the first plate materials 1, 1. The positioning protrusion 5 is welded to the third plate material 3 through the corresponding positioning hole 4.

  The plate lamination structure and the plate lamination method (spot welding method) at the spot welding location are the same as those in the first embodiment, and a description thereof will be omitted.

  According to this embodiment, although the second plate material 2 and the third plate material 3 which are different in material are used for connecting the two first plate materials 1 and 1, a fastening member such as a screw is not used. The connection can be carried out by spot welding. Moreover, since the second plate material 2 and the third plate material 3 are strongly bonded by direct welding with the two first plate materials 1 and 1 sandwiched therebetween, the first plate materials 1 and 1 The connection will be strong.

  The positioning projections 5 may be provided on either the second plate material 2 or the third plate material 3, and some positioning projections 5 are provided on the second plate material 2, and the remaining positioning projections 5 are provided on the second plate material 2. You may make it provide in 3 plate material 3. FIG.

  Further, it is not always necessary to perform spot welding on all the positioning protrusions 5 arranged in two rows. In each row, for example, several positioning protrusions 5 that are appropriately selected are spot-welded. May be.

  FIG. 6 shows another example of the plate connection structure. In this example, the two first plate members 1 and 1 are abutted so as to be orthogonal to each other at their end portions, and the second plate member 2 having an L-shaped cross section The third plate material 3 having an L-shaped cross-section is stacked so as to straddle both the first plate materials 1, 1 and straddles the first plate materials 1, 1 on the opposite side of the first plate materials 1, 1. Are superimposed. Then, positioning protrusions (not shown) provided on either the second plate material 2 or the third plate material 3 are fitted into positioning holes (not shown) provided on the first plate materials 1, 1. 2, the second plate material 2 and the third plate material 3 are joined by spot welding. In FIG. 6, the site | part which attached | subjected x mark to the 2nd plate material 2 is a spot welding location.

<Embodiment 3>
In the present embodiment, the present invention is applied to a plate connection structure different from that of the second embodiment, and an example thereof is shown in FIG. That is, the end portions of the first plate material 1 and the second plate material 2 are overlapped, and the elongated third plate material 3 is overlapped on the end portion of the first plate material 1 from the side opposite to the second plate material 2. It has been. The first plate material 1 is not joined to the second plate material 2 and the third plate material 3. Similar to the previous embodiment, the second plate material 2 and the third plate material 3 are made of metal (for example, steel) and can be spot welded to each other. The first plate material 1 is different in material from the second plate material 2 and the third plate material 3, and can be formed of a lightweight alloy such as an aluminum material or plastic, for example.

  A plurality of positioning holes 4 are formed at intervals in the end portion of the first plate material 1. The second plate material 2 and the third plate material 3 are joined by spot welding through the positioning holes 4 of the first plate material 1. In FIG. 7, the site | part which attached | subjected x mark to the 3rd plate material 3 is a spot welding location.

  The plate laminated structure of the spot welded portion is the same as that of the first embodiment, and as shown in FIG. 2, the positioning projection 5 formed on the second plate material 2 is fitted into the positioning hole 4 of the first plate material 1, It is welded to the third plate material 3 by a nugget 6. That is, a plurality of positioning projections 5 shown in FIG. 2 are formed in one row corresponding to each positioning hole 4 of the first plate material 1 on the second plate material 2, and each positioning projection 5 corresponds. It is welded to the third plate material 3 through the positioning hole 4. Thereby, the 1st plate material 1 and the 2nd plate material 2 are connected.

  The plate lamination structure and the plate lamination method (spot welding method) at the spot welding location are the same as those in the first embodiment, and a description thereof will be omitted.

  According to the present embodiment, the first plate material 1 and the second plate material 2 made of a material different from the first plate material 1 can be joined by spot welding without using a fastening member such as a screw. . Moreover, since the second plate material 2 and the third plate material 3 are strongly coupled by direct welding with the first plate material sandwiched therebetween, the connection between the first plate material and the second plate material is also strong. Become a thing.

  The positioning projections 5 may be provided on either the second plate material 2 or the third plate material 3, and some positioning projections 5 are provided on the second plate material 2, and the remaining positioning projections 5 are provided on the second plate material 2. You may make it provide in 3 plate material 3. FIG.

  Further, it is not always necessary to perform spot welding on all the positioning protrusions 5. For example, several positioning protrusions 5 selected as appropriate may be spot-welded, for example, every other one.

  FIG. 8 shows another example of the plate connection structure. In this example, the end of the second plate material 2 is bent in an L shape to form a flange 2a, and the end of the first plate material 1 is overlapped with the flange 2a. The third plate material 3 is stacked on the end of the first plate material 1 from the side opposite to the flange 2a. Then, positioning protrusions (not shown) provided on either the flange 2a of the second plate material 2 or the third plate material 3 are fitted into positioning holes (not shown) provided at the end of the first plate material 1. In each positioning projection, the flange 2a of the second plate material 2 and the third plate material 3 are joined by spot welding. In FIG. 8, the site | part which attached | subjected x mark to the 3rd plate material 3 is a spot welding location.

<Embodiment 4>
This embodiment is shown in FIG. 9, and positioning projections 5a and 5b corresponding to the positioning holes 4 of the first plate material 1 are opposed to the second plate material 2 and the third plate material 3, respectively. It is an example provided. The first plate material 1 is not joined to the second plate material 2 and the third plate material 3. That is, the positioning projections 5 a and 5 b of the second plate material 2 and the third plate material 3 are fitted in the positioning holes 4 of the first plate material 1 from opposite sides. In a state where the positioning protrusions 5a and 5b are in contact with each other in the middle of the positioning hole 4, they are sandwiched between the pair of electrodes 7 and 8 and energized between the electrodes. Thereby, a plate laminated structure in which the positioning projections 5a of the second plate material 2 and the positioning projections 5b of the third plate material 3 are directly welded without interposing the first plate material 1 is obtained.

  This plate laminated structure can be employed in the plate reinforcing structure and plate connecting structure of the first to third embodiments.

<Embodiment 5>
This embodiment is shown in FIG. 10 and is an example in which the first plate material is composed of two plates 1a and 1b that are stacked on each other. The plates 1 a and 1 b are not joined to the second plate material 2 and the third plate material 3. Corresponding positioning holes 4 are formed in each of the plates 1a and 1b. The second plate material 2 is formed with positioning protrusions 5a corresponding to the positioning holes 4 of the plate 1a, and the third plate material 3 is formed with positioning protrusions 5b corresponding to the positioning holes 4 of the plate 1b.

  The positioning projections 5a and 5b of the second plate material 2 and the third plate material 3 are fitted into the positioning holes 4 of the plates 1a and 1b constituting the first plate material from opposite sides. In a state where the positioning protrusions 5a and 5b are in contact with each other, the pair of electrodes 7 and 8 are sandwiched between the electrodes, and electricity is applied between the electrodes. Thereby, a plate laminated structure in which the positioning projection 5a of the second plate material 2 and the positioning projection 5b of the third plate material 3 are directly welded without interposing the first plate material is obtained.

  This plate laminated structure can be employed in the plate reinforcing structure and plate connecting structure of the first to third embodiments.

<Others>
In each of the above embodiments, the positioning hole 4 is tapered, but it is not always necessary to provide the taper.

DESCRIPTION OF SYMBOLS 1 1st plate material 2 2nd plate material 3 3rd plate material 4 Positioning hole 5 Positioning protrusion 6 Nugget 7,8 Electrode

Claims (5)

A plate laminated structure in which a second plate material and a third plate material that can be spot welded to each other are laminated on both surfaces of a first plate material consisting of a single plate or a plurality of stacked plates,
The first plate material is formed of a material different from the second plate material and the third plate material, and has at least one positioning hole.
Positioning projections corresponding to the positioning holes of the first plate material are formed on at least one of the second plate material and the third plate material,
The positioning protrusion is fitted into the positioning hole of the first plate material,
The second plate material and the third plate material are welded by spot welding at at least one positioning projection fitted in the positioning hole of the first plate material. A plate reinforcing structure in which a first plate material consisting of a single plate or a plurality of stacked plates is reinforced by a second plate material and a third plate material that can be spot welded to each other,
The first plate material is formed of a different material from the second plate material and the third plate material, and has a plurality of positioning holes.
A plurality of positioning protrusions corresponding to the plurality of positioning holes of the first plate material are formed on at least one of the second plate material and the third plate material,
The plurality of positioning protrusions fit into corresponding positioning holes of the first plate material,
The second plate material and the third plate material are welded by spot welding at at least one positioning projection fitted in the positioning hole of the first plate material. A plate connection structure in which two first plate materials each consisting of one plate or a plurality of stacked plates are connected by a second plate material and a third plate material that can be spot welded to each other,
Each of the two first plate members is formed of a different material from the second plate member and the third plate member, and has a plurality of positioning holes at each end.
Each of the second plate material and the third plate material is overlapped from both surfaces of the two first plate materials so as to straddle both ends of the two first plate materials,
A plurality of positioning protrusions corresponding to the positioning holes of each of the first plate materials are formed on at least one of the second plate material and the third plate material,
The plurality of positioning protrusions fit into corresponding positioning holes in each of the two first plate members,
The second plate material and the third plate material are welded by spot welding at at least one positioning projection fitted in the positioning hole of each of the two first plate materials. It is a plate connection structure in which a first plate material and a second plate material comprising a single plate or a plurality of stacked plates are connected to the second plate material by a third plate material that can be spot welded. And
The first plate material is formed of a material different from the second plate material and the third plate material, and has a plurality of positioning holes at the end thereof.
The second plate material is overlapped with an end portion of the first plate material having a plurality of positioning holes,
The third plate material is stacked from the side opposite to the second plate material with respect to the end portion having the positioning hole of the first plate material,
A plurality of positioning protrusions corresponding to the plurality of positioning holes of the first plate material are formed on at least one of the second plate material and the third plate material,
The plurality of positioning protrusions fit into corresponding positioning holes of the first plate material,
The second plate material and the third plate material are welded by spot welding at at least one positioning projection fitted in the positioning hole of the first plate material. A plate laminating method of laminating a second plate material and a third plate material that can be spot welded to each other on both surfaces of a first plate material composed of one plate or a plurality of stacked plates,
The first plate material is formed of a material different from the second plate material and the third plate material,
In the first plate material, at least one positioning hole is formed,
A positioning projection corresponding to the positioning hole of the first plate material is formed on at least one of the second plate material and the third plate material,
The first plate material to the third plate material are stacked so that the positioning protrusions fit into the positioning holes,
The second plate material and the third plate material are welded by spot welding at at least one positioning projection fitted in the positioning hole of the first plate material.

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