JP2006192482A - Method for manufacturing joined metal plates - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enhance the joining strength of joined metal plates by filling the bent portion of each metal plate with an adhesive, without increasing working manpower in manufacture. <P>SOLUTION: The invention relates to a method for manufacturing joined metal plates 1 comprising an upper metal plate 10 and a lower metal plate 20. The upper metal plate 10 is continuously formed via an upper bent portion 13 where an upper wall portion 11 which extends vertically and an upper flange portion 12 which extends crosswise are formed in a curve. The lower metal plate 20 is continuously formed via a lower bent portion 23 where a lower wall portion 21 which extends vertically and a lower flange portion 22 which extends crosswise are formed in a curve. The upper metal plate 10 and the lower metal plate 20 are formed so that the upper flange portion 12 and the lower flange portion 22 separate crosswise from each other toward the upper bent portion 13 and the lower bent portion 23, and the upper flange portion 12 and the lower flange portion 22 are pinched and welded in a state of interposing the adhesive 30 between the upper flange portion 12 and the lower flange portion 22. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a method for manufacturing a bonded metal plate in which two metal plates are bonded to each other by an adhesive and welding.

  Spot welding is used for joining metal plates in large products such as automobile vehicles and railway vehicles. In spot welding, two stacked metal plates are sandwiched between a pair of electrode tips, and a current is passed in the thickness direction while sandwiching between the two metal plates to form a melted part called a weld nugget on both metal plates. The two metal plates are welded to each other in a dot shape.

  When this spot welding is performed, there is a joining method called weld bond joining in which a bonding portion of each metal plate is filled with an adhesive in advance (see, for example, Patent Document 1). According to this bonding method, since the bonding strength by the adhesive is added to the bonding strength by spot welding, the bonding strength is improved by the amount of solidified adhesive when the spot welding spot positions and number are the same. Can do.

In the bonded metal plate described in Patent Document 1, two metal plates continuously form one wall portion, and a flange portion substantially perpendicular to the wall portion is formed at the boundary portion of each metal plate. Then, in a state where the adhesive is filled between the flange portions, the flange portions are overlapped and spot welding is performed. When the joining metal plate has a bag-like structure, an adhesive is applied in advance to at least one flange portion of the upper metal plate and the lower metal plate before the substantially horizontal flange portions are overlapped with each other. In each metal plate, the wall portion and the flange portion are continuously formed via a curved bent portion. As described above, in a portion formed in a bag shape by two metal plates such as an outer panel and an inner panel of a vehicle, a flange portion is formed on each metal plate and spot welding is generally performed.
JP 2004-82136 A

By the way, if the adhesive can be solidified not only between the flange portions of the respective metal plates but also on the bent portion side, the bonding strength is greatly improved. Here, the amount of the adhesive applied to the flange portion is increased, and the adhesive is made to protrude from each flange portion to each bent portion side during spot welding, thereby allowing the adhesive to be It is conceivable to fill it.
However, in the above-described method for manufacturing a bonded metal plate, since each flange portion is formed substantially horizontally, if the amount of the adhesive applied to the flange portion is increased, bonding is performed from the opposite side to each bent portion. The agent protrudes and flows out of the bonded metal plate. The adhesive that has flowed to the outer surface of the bonded metal plate having a bag-like structure needs to be wiped off in a subsequent process, resulting in an increase in the number of work steps during manufacturing.

  The present invention has been made in view of the above circumstances, and the object of the present invention is to fill the bent portions of the respective metal plates with an adhesive without increasing the number of man-hours during manufacture. It is providing the manufacturing method of the joining metal plate which can improve the joining strength of a board.

In order to achieve the above object, according to the first aspect of the present invention, the upper metal plate is formed continuously via the upper curved portion in which the upper wall portion extending vertically and the upper flange portion extending left and right are curved. A lower metal plate formed continuously through a lower wall portion extending vertically and a lower bent portion formed by bending a lower flange portion extending left and right, and the upper flange portion; A method of manufacturing a bonded metal plate to which the lower flange portion is bonded, wherein the upper metal plate and the lower metal plate are connected to each other, and the upper bent portion and the lower flange portion are in the left-right direction. And a metal plate pressing step that is formed so as to be separated from each other toward the lower bent portion, and an adhesive is interposed between the upper flange portion and the lower flange portion, and the upper flange portion and the lower side Positioning with the flanges facing each other And extent, after the positioning step, said upper flange portion and nipped the lower flange portion, and having a a joining step of welding the said lower flange portion and the upper flange portion.
The “up and down” and “left and right” directions here are based on the direction of the bonded metal plate at the time of manufacture, and the direction in which the bonded metal plate is incorporated in an automobile body, a railway vehicle body or the like. It has nothing to do with.

According to the first aspect of the present invention, the upper flange portion and the lower flange portion are formed to be separated from each other toward the upper bent portion and the lower bent portion in the left-right direction in the metal plate pressing step. When the flange portions are clamped in the joining step, the adhesive between the flange portions is pushed out to the bent portions more than the opposite side. That is, without causing the adhesive to protrude from the opposite side of each bent portion in each flange portion, the adhesive is allowed to actively protrude from each flange portion to each bent portion side, and the adhesive between the bent portions. Can be filled.
Therefore, since the adhesive does not flow out to the outer surface of the bonded metal plate, it is not necessary to wipe off the adhesive in a subsequent process, and the number of man-hours for manufacturing is not increased. And the manufactured joining metal plate will adhere an upper metal plate and a lower metal plate also in each upper flange part and lower bent part in addition to each flange part. Compared to the conventional one in which the upper metal plate and the lower metal plate are bonded, the bonding strength of the bonded metal plate can be dramatically improved.

According to a second aspect of the present invention, in the method for manufacturing a bonded metal plate according to the first aspect, the upper surface of the upper flange portion and the lower surface of the lower flange portion are rolled in the front-rear direction in the bonding step. The upper flange portion and the lower flange portion are clamped using a pair of upper and lower rollers.
Here, the “front-rear direction” is based on the direction of the bonded metal plate at the time of manufacture, and is irrelevant to the direction in which the bonded metal plate is incorporated in an automobile body, a railway vehicle body or the like.

  According to the second aspect of the invention, in addition to the action of the first aspect, the upper flange portion and the lower flange portion are clamped by the pair of upper and lower rollers, so that each flange portion is accurately molded substantially horizontally. However, the adhesive can be uniformly filled in the left-right direction between the flange portions. Moreover, since each roller rolls back and forth, each flange part can be uniformly shape | molded in the front-back direction, and an adhesive agent can be uniformly filled also in the front-back direction between each flange part.

  According to a third aspect of the present invention, in the method for manufacturing a bonded metal plate according to the second aspect, in the bonding step, the shaft support portion of each roller is the upper curved portion of the upper flange portion and the lower flange portion. It is slidably in contact with the left and right end portions on the opposite side of the formed portion and the lower bent portion.

  According to the third aspect of the invention, in addition to the operation of the second aspect, the shaft support portion of each roller is slidably contacted with the end portion of each flange portion opposite to the bent portion in the joining step. Outflow of the adhesive from the opposite side of each bent portion in the portion is restricted by the shaft support portion. Accordingly, it is possible to more reliably prevent the adhesive from flowing out to the outer surface of the bonded metal plate.

  According to a fourth aspect of the present invention, in the method for manufacturing a bonded metal plate according to the second or third aspect, a welding electrode is arranged on the peripheral surface of each roller, and in the bonding step, The upper flange portion and the lower flange portion are welded while being pinched.

  According to invention of Claim 4, in addition to the effect | action of Claim 2 or 3, it can perform the clamping operation | work and welding operation of each flange part at once, reducing the work man-hour at the time of manufacture, and joining metal The productivity of the plate can be improved.

  Thus, according to the present invention, it is possible to improve the bonding strength of the bonded metal plate by filling the bent portions of the metal plates with the adhesive without increasing the number of work steps during manufacturing.

  1 to 5 show an embodiment of the present invention. FIG. 1 is a schematic perspective view of a side member of an automobile body, FIG. 2 is a schematic sectional view of the side member, and FIG. 3 is an upper flange portion. And a schematic cross section of the side member showing a state in which the lower flange portion is formed to be separated from each other toward the upper bent portion and the lower bent portion in the left-right direction and an adhesive is interposed between the flange portions. 4 and 4 are schematic cross-sectional views of the side member showing a state in which the upper flange portion and the lower flange portion are clamped by a pair of upper and lower rollers. FIG. 5 is a cross-sectional view taken along the line AA in FIG.

  As shown in FIG. 1, the bonded metal plate 1 is used for a side member extending substantially front and rear in an automobile body, and the upper metal plate 10 whose cross section is formed in a substantially hat shape and the cross section is formed in a substantially reverse hat shape. The lower metal plate 20 is joined. The upper metal plate 10 and the lower metal plate 20 each made of iron are joined by spot welding in a state where the adhesive 30 is applied to the mating surfaces, and the upper metal plate 10 and the lower metal plate 20 The wall part 21 forms the vertical wall 31 continuously. The upper metal plate 10 has an upper flange portion 12 extending horizontally, the lower metal plate 20 has a lower flange portion 22 extending horizontally, and the lower surface of the upper flange portion 12 and the upper surface of the lower flange portion 22 are aligned. It has a surface.

  As shown in FIG. 1, the upper metal plate 10 is formed such that an upper wall portion 11 that extends substantially vertically and an upper flange portion 12 that extends horizontally are continuously formed via an upper bent portion 13 that is curved. Further, the lower metal plate 20 is formed such that a lower wall portion 21 extending substantially vertically and a lower flange portion 22 extending horizontally are continuously formed via a lower bent portion 23 formed by bending. As shown in FIG. 2, the upper bent portion 13 and the lower bent portion 23 are formed with substantially the same curvature, and are convexly formed inside the closed cross section formed by the respective metal plates 10 and 20. Thereby, the vertical wall 31 and each flange part 12 and 22 are connected smoothly. A solidified adhesive 30 is interposed between the flange portions 12 and 22.

  In this joined metal plate 1, the upper flange portion 12 of the upper metal plate 10 and the lower flange portion 22 of the lower metal plate 20 are joined by being sandwiched and welded with an adhesive 30 interposed therebetween. Is done. In this embodiment, this clamping pressure is performed by sandwiching the flange portions 12 and 22 with a pair of electrode tips during spot welding. Spot welding is performed at intervals in the front-rear direction, and a plurality of nuggets 32 arranged in the front-rear direction are formed on the flange portions 12, 22 (see FIG. 1).

The manufacturing method of the metal joining plate 1 comprised as mentioned above is demonstrated.
First, as shown in FIG. 3, the upper metal plate 10 and the lower metal plate 20 are moved from the upper flange portion 12 and the lower flange portion 22 toward the upper bent portion 13 and the lower bent portion 23 in the left-right direction. It forms so that it may mutually space apart (metal plate press process). In the present embodiment, the bent portions 13 and 23 of the upper metal plate 10 and the lower metal plate 20 are not bent until the flange portions 12 and 22 reach the horizontal, and the flange portions 12 and 22 are not bent. Each has a predetermined angle with respect to the horizontal.

  After the metal plate pressing step, as shown in FIG. 3, an adhesive 30 is interposed between the upper flange portion 12 and the lower flange portion 22 so that the upper flange portion 12 and the lower flange portion 22 face each other (positioning). Process). Specifically, after the semi-fluid adhesive 30 is applied to the lower flange portion 22, the upper flange portion 12 is opposed to the lower flange portion 22.

  After the positioning step, the upper flange portion 12 and the lower flange portion 22 are clamped to weld the upper flange portion 12 and the lower flange portion 22 (joining step). In the present embodiment, as shown in FIG. 4, the upper flange portion 12 and the lower flange are formed using a pair of upper and lower rollers 40 that roll in the front-rear direction on the upper surface of the upper flange portion 12 and the lower surface of the lower flange portion 22. The part 22 is pinched.

  At this time, the upper flange portion 12 and the lower flange portion 22 are formed so as to be spaced apart from each other toward the upper bent portion 13 and the lower bent portion 23 in the left-right direction. When pressed, the adhesive 30 between the flange portions 12 and 22 is pushed out to the bent portions 13 and 23 side more than the opposite side. That is, the adhesive 30 is positively moved from the flanges 12 and 22 to the bent portions 13 and 23 without protruding the adhesive 30 from the opposite sides of the bent portions 12 and 22 to the bent portions 13 and 23. Thus, the adhesive 30 can be filled between the bent portions 13 and 23.

  As shown in FIG. 4, the horizontal dimension of each roller 40 is substantially the same as the horizontal dimension of the upper flange portion 12 and the lower flange portion 22. A shaft member 41 that passes through each roller 40 is fixed to a shaft support portion 42 that extends vertically. The shaft support portion 42 is provided with a sliding contact portion 42 a that is in sliding contact with the left and right end portions on the opposite side of the upper bent portion 13 and the lower bent portion 23 of the upper flange portion 12 and the lower flange portion 22. The sliding contact portion 42a is made of, for example, a resin member, and thereby the shaft support portion 42 and the rollers 40 are positioned to the left and right with respect to the flange portions 12 and 22, respectively.

  Further, as shown in FIG. 5, welding electrodes 43 are arranged on the rollers 40 at predetermined intervals in the circumferential direction. In the present embodiment, as shown in FIG. 4, the peripheral surface of each roller 40 is formed flat without protrusions and the like, and each electrode 43 embedded in the roller 40 is exposed from the peripheral surface. ing. The electrodes 43 of the upper and lower rollers 40 are in contact with the upper and lower surfaces of the flange portions 12 and 22 at the same timing, and the flange portions 12 and 22 are sandwiched between the pair of upper and lower electrodes 43. In addition, an insulator is disposed around each electrode 43 in each roller 40 so that current does not flow to the roller 40 side when each electrode 43 is energized, but current flows to each flange portion 12 and 22.

  Thus, according to the manufacturing method of the joining metal plate 1 of this embodiment, since the adhesive 30 does not flow out to the outer surface of the joining metal plate 1, it is not necessary to wipe off the adhesive 30 in a subsequent process. There is no increase in work man-hours during manufacturing. And the manufactured joining metal plate 1 adhere | attaches the upper metal plate 10 and the lower metal plate 20 also in the upper side bending part 13 and the lower side bending part 23 in addition to each flange part 12 and 22. Thus, the bonding strength of the bonded metal plate 1 can be dramatically improved as compared with the conventional one in which the upper metal plate 10 and the lower metal plate 20 are bonded only by the flange portions 12 and 22.

  In particular, in the present embodiment, as shown in FIG. 4, the shaft support portion 42 of each roller 40 is in sliding contact with the end portion of each flange portion 12, 22 opposite to the bent portion 13, 23 in the joining process. The outflow of the adhesive 30 from the opposite sides of the bent portions 13 and 23 in the flange portions 12 and 22 is restricted by the shaft support portion 42. Accordingly, it is possible to more reliably prevent the adhesive 30 from flowing out to the outer surface of the bonded metal plate 1.

  Moreover, according to the manufacturing method of the joining metal plate 1 of this embodiment, since the upper flange part 12 and the lower flange part 22 were clamped by the pair of upper and lower rollers 40, the flange parts 12, 22 are substantially horizontal. The adhesive 30 can be uniformly filled in the left-right direction between the flange portions 12 and 22 while being accurately molded. Further, as shown in FIG. 5, since each roller 40 rolls back and forth, each flange portion 12 and 22 can be uniformly molded in the front and rear direction, and adhesive 30 is applied to each flange portion 12 and 22. It is possible to fill evenly across the front-rear direction.

  Moreover, according to the manufacturing method of the joining metal plate 1 of this embodiment, since it welded while pinching the upper side flange part 12 and the lower side flange part 22 with each roller 40 at the joining process, each flange part 12 and 22 can be carried out at a time and welding work can be carried out at the same time, and the man-hours during the production can be reduced and the productivity of the bonded metal plate 1 can be improved.

  Here, FIG. 6 shows experimental data obtained by measuring how the bonding strength changes depending on the application state of the adhesive 30. In the experiment, the adhesive 30 was bonded between the flanges 12 and 22 in addition to the spot welding as shown in FIG. Solidified material (hereinafter referred to as sample 2), and solidified adhesive 30 between the flange portions 12 and 22 and the bent portions 13 and 23 in addition to spot welding as shown in FIG. Hereinafter, it was divided into Sample 3). Samples 1 to 3 had the same shape as the side members used in actual car bodies.

  As shown in FIG. 6, the bonding strengths of the flange portions 12 and 22 were higher in the order of sample 3, sample 2, and sample 1. In FIG. 6, the opening displacement of each flange portion 12, 22 is taken as the horizontal axis, and the load necessary for this opening displacement is taken as the vertical axis. Comparing sample 2 and sample 3, it has been experimentally proven that sample 3 must be loaded approximately 1.5 times or more at the same opening displacement. Thus, experimentally, when not only the flange portions 12 and 22 but also the upper bent portion 13 or the lower bent portion 23 are filled with the adhesive 30 and solidified, the bonding strength is greatly improved. It has been confirmed.

  In the above-described embodiment, the outer peripheral surface of each roller 40 is flat. However, a plurality of electrodes 143 may be provided on each roller 140 so as to protrude as shown in FIG. In addition, spot welding may not be performed as in the above-described embodiment, and the electrodes of each roller may be formed in a disk shape and seam welding may be performed. In other words, if welding electrodes are arranged on the circumferential surface of the roller and welding is performed while the flange portions 12 and 22 are clamped in the joining step, the same effects as those of the above embodiment can be obtained.

  Further, even when the flange portions 12 and 22 are clamped by using a roller on which the electrode 43 is not disposed and then the flange portions 12 and 22 are welded by a spot welding gun, the same joining as in the above embodiment is performed. The metal plate 1 can be manufactured. In this case, a resistance welding method other than spot welding such as seam welding may be used. For example, even with laser welding, the adhesive 30 is placed between the flange portions 12 and 22 and between the bent portions 13 and 23. It is possible to fill and weld.

  Moreover, in the said embodiment, although the axial support part 42 of each roller 40 showed what slidably contacts with the edge part of each flange part 12 and 22, it is not necessary to make the axial support part 42 slidably contact. Moreover, in the said embodiment, although each roller 40 clamped each flange part 12 and 22 from the edge part of each bending part 13 and 23 side to the edge part on the opposite side, it showed each bending part. Gradually pressing may be performed from the end on the opposite side to the forming portions 13 and 23 toward the bending portions 13 and 23. In this case, in addition to the formation state of each flange part 12 and 22, depending on the clamping state of each roller 40, a large amount of the adhesive 30 can be pushed out to the respective bending parts 13 and 23 side. , 23 is effective for filling the adhesive 30 into the.

  Moreover, in the said embodiment, although what pressed each flange part 12 and 22 by each roller 40 was shown, for example, each flange part 12 and 22 is clamped using the clamp tool which has a pair of upper and lower clamp parts. May be.

  Moreover, in the said embodiment, although each flange part 12 and 22 has shown the state which has a predetermined angle with respect to each horizontal, for example, one of each flange part 12 and 22 becomes horizontal If the other side has a predetermined angle with respect to the horizontal, the upper flange portion 12 and the lower flange portion 22 move to the upper bent portion 13 and the lower bent portion 23 in the left-right direction. It is spaced apart from each other, and the same effect as the above embodiment can be obtained.

  Furthermore, in the said embodiment, although the joining metal plate 1 showed what was used for a motor vehicle body, it can also be used for a rail vehicle body, an aircraft, etc. Moreover, although what was used for the side member of a motor vehicle body was shown, it may be used for other parts, such as a cross member and a pillar. Here, even if the metal plate is divided vertically and horizontally or extending like a pillar, bonding is performed with one metal plate on the upper side and the other metal plate on the lower side, and the adhesive solidifies. After that, it can be assembled to other parts.

  Furthermore, in the above-described embodiment, a substantially hat-shaped metal plate and a substantially inverted hat-shaped metal plate are joined. However, the upper metal plate has an upper wall portion, an upper curved portion, and an upper flange portion. And if a lower metal plate has a lower wall part, a lower curved part, and a lower flange part, the shape of an upper metal plate and a lower metal plate will not be ask | required.

  Moreover, in the said embodiment, although the upper side metal plate 10 and the lower side metal plate 20 showed what consists of iron, they may consist of other metals, such as aluminum, for example. Further, the surface roughness of the bent portions 13 and 23 is made rougher than that of the flange portions 12 and 22 so that the adhesive 30 can be easily stored, or a plate member is interposed between the flange portions 12 and 22. Of course, other detailed structures and the like can be appropriately changed.

It is a typical perspective view of the side member of the automobile body which shows one embodiment of the present invention. It is typical sectional drawing of a side member. An upper flange portion and a lower flange portion are formed so as to be separated from each other toward the upper bent portion and the lower bent portion in the left-right direction, and an adhesive is interposed between the flange portions. It is typical sectional drawing. It is typical sectional drawing of the side member which shows the state which has clamped the upper side flange part and the lower side flange part with a pair of upper and lower rollers. It is AA sectional drawing of FIG. It is a graph which shows the relationship between the opening displacement of a flange part, and a load. It is typical sectional drawing of the side member which filled only the flange part with the adhesive agent. It is a typical sectional view of a side member showing a modification and showing a state where an upper flange part and a lower flange part are clamped by a pair of upper and lower rollers.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Joining metal plate 10 Upper metal plate 11 Upper wall part 12 Upper flange part 13 Upper bent part 20 Lower metal plate 21 Lower wall part 22 Lower flange part 23 Lower bent part 30 Adhesive 40 Roller 42 Shaft support part 43 Electrode 140 Roller 143 Electrode

Claims (4)

An upper metal plate continuously formed through an upper bent portion in which an upper wall portion extending vertically and an upper flange portion extending left and right are curved, a lower wall portion extending vertically, and a lower flange portion extending left and right A lower metal plate formed continuously through a lower bent portion formed by bending, and a method of manufacturing a bonded metal plate in which the upper flange portion and the lower flange portion are joined together There,
Metal plate press for forming the upper metal plate and the lower metal plate so that the upper flange portion and the lower flange portion are separated from each other toward the upper bent portion and the lower bent portion in the left-right direction. Process,
A positioning step in which an adhesive is interposed between the upper flange portion and the lower flange portion, and the upper flange portion and the lower flange portion are opposed to each other;
After the positioning step, there is a joining step of clamping the upper flange portion and the lower flange portion and welding the upper flange portion and the lower flange portion. Method.   In the joining step, the upper flange portion and the lower flange portion are clamped using a pair of upper and lower rollers that roll in the front-rear direction on the upper surface of the upper flange portion and the lower surface of the lower flange portion. The manufacturing method of the joining metal plate of Claim 1.   In the joining step, the shaft support portion of each roller is in sliding contact with the left and right end portions on the opposite side of the upper bent portion and the lower bent portion of the upper flange portion and the lower flange portion. The manufacturing method of the joining metal plate of Claim 2. An electrode for welding is arranged on the peripheral surface of each roller,
The method for manufacturing a bonded metal plate according to claim 2 or 3, wherein, in the bonding step, the upper flange portion and the lower flange portion are welded while being pressed by the rollers.

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