JP5445206B2 - Method for manufacturing closure part for vehicle and closure part for vehicle - Google Patents

Description

  The present invention relates to a method for manufacturing a vehicle closure part manufactured by joining ends of a plurality of different types of metal plate members, and a vehicle closure part.

  The reduction in weight of automobiles greatly contributes to improvement in fuel consumption, and therefore, various methods are used in the development stage, such as reviewing the design of each part or modularizing a plurality of parts.

  In particular, the weight of automobile bodies has been reduced by the use of high-strength steel sheets. However, in recent years, the replacement of materials with dissimilar metal materials that are even lighter than steel sheets, such as aluminum alloys and magnesium alloys, has become possible. Has been done.

  Such replacement with a light alloy material greatly contributes to weight reduction, such as roofs, side doors, back doors, bonnets, trunk lids and other openable parts, so-called closure parts (opening / closing bodies).

  By the way, when light alloy materials are used in combination with steel plate materials, it is known that the presence of moisture at the interface between the light alloy materials and the steel plate materials causes electrolytic corrosion due to the difference in ionization tendency. Yes. For example, if moisture is interposed between an aluminum alloy outer panel and a steel plate inner panel, the outer panel may be thinned by electrolytic corrosion.

  As a measure against this electrolytic corrosion, for example, a sealing material is conventionally interposed between a light alloy material and a steel plate material. For this sealing material, a water-insoluble organic synthetic compound having a relatively high viscosity is usually used.

  However, if such a sealing material is filled in the entire portion where electric corrosion is likely to occur, a part of the sealing material protrudes from the end of the plate material to the outside, and in this state, it is performed before the painting process. When entering the water washing process using a shower or the like, the protruding sealing material may be scattered by the water pressure.

  The scattered sealing material not only impairs the appearance of the vehicle body, but even if the sealing material is wiped off, the productivity is greatly reduced due to its relatively high viscosity and water insolubility.

  In addition, since the protruding water-insoluble sealing material is difficult to attach to and remove from some jigs and processing equipment for hemming processing, there is a problem that the accuracy of hemming processing gradually decreases. .

  For example, Patent Document 1 (Japanese Patent Application Laid-Open No. 2004-9794) discloses a structure for preventing the seal material from protruding in such a vehicle door. The structure disclosed in Patent Document 1 is not a structure in which a light alloy material and a steel plate material are combined, but in a structure in which the end of the outer panel is hemmed and the end of the inner panel is overlapped and fixed, A trap portion for preventing the material from protruding is provided.

  The trap portion is formed by a notch or the like for storing the sealing material near the end of the outer panel so that the sealing material does not protrude from the end of the outer panel.

Japanese Patent Laid-Open No. 2004-9794

  In the structure described in Patent Document 1, since the sealing material is not completely filled in the hemmed portion, there is a risk of electrolytic corrosion when hemming is performed between different kinds of metals.

  That is, when the outer panel is a light alloy material such as an aluminum alloy and the inner panel is a steel plate, the space between the inner side surface of the outer panel folded by hemming and the inner panel facing the outer panel is not filled with the sealing material. Therefore, there is a possibility that electrolytic corrosion occurs in the outer panel made of aluminum alloy.

  On the other hand, in order to prevent the occurrence of electrolytic corrosion, it is effective to fill the entire hemmed region including the end portion of the folded outer panel with a sealing material. However, as described above, the protrusion is unavoidable, and the appearance and productivity are problematic.

  The present invention has been made in view of the above circumstances, and a method for manufacturing a closure component for a vehicle that can prevent electrolytic corrosion in a hemming portion between dissimilar metals and prevent protrusion of a water-insoluble sealer, And it aims at providing the closure component for vehicles.

In order to solve the above problems, the present invention provides a method for manufacturing a closure component for a vehicle manufactured by joining ends of two different types of metal plate materials.
A water-insoluble sealer and a water-soluble sealer are provided on at least one surface of the two metal plates facing each other, and the water-soluble sealer is closer to the end of the metal plate than the water-insoluble sealer. As described above, the step of arranging and coating in the direction toward the end of the metal plate,
Temporarily bonding the two metal plate materials through the water-insoluble sealer and the water-soluble sealer so that the metal plate materials are opposed to each other;
The end of one of the two metal plates is folded and hemmed so as to enclose the end of the other metal plate, and joined with the end of the other metal plate, Expanding the water-soluble sealer toward the end of the metal plate folded by hemming;
Of the expanded water-soluble sealer, a step of washing and removing the water-soluble sealer protruding from the end of the one metal plate material folded back by hemming, and
And a step of applying a coating sealer in the vicinity of an end portion of the metal plate material from which the water-soluble sealer has been removed by washing with water (Claim 1).

  According to the present invention, the water-soluble sealer and the water-insoluble sealer are applied side by side in the direction toward the end of the metal plate so that only the water-soluble sealer protrudes from the end of the hemmed portion. Therefore, it is possible to prevent the water-insoluble sealer from flowing out. Thereby, the electrolytic corrosion in the hemming process part between dissimilar metals can be prevented, and the protrusion of the water-insoluble sealer can be prevented.

  In addition, the water-soluble sealer protrudes from the end of the hemmed portion to the outside, but the protruding portion can be easily washed and removed, and there is no possibility of remaining attached to the closure part. Moreover, even if it adheres to jigs for hemming, etc., it can be easily removed by washing with water.

  Further, after the water-soluble sealer is removed by washing with water, the coating sealer is applied to the end portion of the metal plate material, so that it is possible to reliably prevent water from entering from the end portion of the metal plate material. Moreover, it can also be surely prevented that the water-soluble sealer is melted and water is stored in the melted portion and the occurrence of electrolytic corrosion occurs.

The vehicle closure component of the present invention includes an outer panel made of a metal plate,
The outer panel and an inner panel made of a different type of metal plate,
The end portion of the outer panel is joined to the end portion of the inner panel by being folded and hemmed so as to include the end portion of the inner panel.
Among the hemmed parts, at least a part between the folded part and the inner panel, which is a folded part of the outer panel, is disposed with a water-soluble sealer,
Between the outer panel and the inner panel, a water-insoluble sealer is disposed at a position opposite to the tip of the folded portion of the water-soluble sealer,
A coating sealer is applied to at least the tip of the folded portion of the hemmed portion (Claim 2).

  According to the present invention, between the outer panel and the inner panel, since the water-soluble sealer and the water-insoluble sealer are arranged side by side in the direction toward the tip of the folded portion in the hemmed portion, the structure is applied. It is possible to prevent the water-insoluble sealer from flowing out. Thereby, the electrolytic corrosion in the hemming process part between dissimilar metals can be prevented, and the protrusion of the water-insoluble sealer can be prevented.

  In addition, when applying a water-soluble sealer, it protrudes from the end of the hemmed portion to the outside, but the protruding portion can be easily washed with water and remains attached to the closure part. There is no loss in appearance.

  Furthermore, since the coating sealer is applied to the tip of the folded portion, it is possible to reliably prevent water from entering from the end of the folded portion. Moreover, it can also prevent that the water-soluble sealer melts and water is stored in the melted portion, and the occurrence of electric corrosion occurs.

  As a preferred embodiment of the present invention, the vehicle closure part is preferably a vehicle door (claim 3).

  In this case, even when different types of metal panels are joined to manufacture the vehicle door, it is possible to prevent electrolytic corrosion at the hemming portion between the panels and to prevent the water-insoluble sealer from protruding.

  As described above, according to the method for manufacturing a vehicle closure part and the vehicle closure part of the present invention, it is possible to prevent electrolytic corrosion at a hemming-processed portion between dissimilar metals and to prevent protrusion of a water-insoluble sealer. Can do.

It is a perspective view of the door for vehicles concerning one embodiment of the closure part for vehicles of the present invention. It is the II-II sectional view taken on the line of FIG. It is explanatory drawing of the process of apply | coating the water-soluble sealer and water-insoluble sealer which concern on one Embodiment of the manufacturing method of the closure component for vehicles of this invention side by side. It is explanatory drawing of the hemming process which concerns on one Embodiment of the manufacturing method of the closure component for vehicles of this invention. It is explanatory drawing of the water washing removal process which concerns on one Embodiment of the manufacturing method of the closure component for vehicles of this invention. It is explanatory drawing of the coating sealer application | coating process which concerns on one Embodiment of the manufacturing method of the closure component for vehicles of this invention. It is explanatory drawing which shows generation | occurrence | production of the electric corrosion in the conventional vehicle door which is a comparative example of the closure component for vehicles of this invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. First, a vehicle door will be described as an example of a vehicle closure component according to the present invention.

  The vehicle door 1 according to this embodiment shown in FIGS. 1 and 2 includes an outer panel 2 made of a light alloy material such as an aluminum alloy, and an inner panel 3 made of a steel plate material.

  The end portion of the outer panel 2 is joined to the end portion of the inner panel 3 by being folded and hemmed so as to include the end portion of the inner panel 3.

  The hemmed portion at the end portion of the outer panel 2, that is, the hem portion 4 includes a ball portion 5 that is a substantially semicircular cross-sectional portion where the end portion of the outer panel 2 is curved and bent, and an end portion of the outer panel 2. And a folded portion 6 which is a portion of a substantially linear cross section.

  A water-soluble sealer 7 is filled in at least part of the inside of the hem portion 4 between the folded portion 6 and the inner panel 3. For example, in the present embodiment, the water-soluble sealer 7 is filled inside the hem portion 4, between the folded portion 6 and the end portion 3 a of the inner panel 3, and inside the ball portion 5.

  On the other hand, between the outer panel 2 and the inner panel 3, a water-insoluble sealer 8, which is an adhesive, is filled at a position on the opposite side of the folded-back portion 6 of the water-soluble sealer 7 with respect to the tip 6 a. In addition, the water-insoluble sealer 8 may be filled up to a part on the folded-back portion 6 side so as to include the front end portion of the inner panel 3 facing the ball portion 5. That is, the water-soluble sealer 7 may be filled in the vicinity of the front end portion 6 a of the folded portion 6, and the water-insoluble sealer 8 may be filled in other portions.

  Moreover, the coating sealer 9 is apply | coated to the front-end | tip part 6a of the folding | turning part 6 among the hem parts 4 shown by FIGS. In addition, the application sealer 9 may be applied over a wide range including the periphery thereof in addition to the front end portion 6a.

  Here, as the water-soluble sealer 7, for example, an acrylic water-soluble adhesive, a water-soluble protein, or a water-based epoxy resin is used.

  The acrylic water-soluble adhesive has, for example, a peel adhesive strength of about 12 to 30 MPa, specifically, 3042B (trade name) manufactured by Three Bond Co., Ltd.

  The water-soluble protein is, for example, one having a peel adhesive strength of about 25 MPa, specifically, a tight bond (trade name) manufactured by Franklin.

  The water-based epoxy resin has, for example, a peel adhesive strength of about 20 MPa, and specifically, is a water-based epoxy resin manufactured by JER.

  Further, the water-insoluble sealer 8 is, for example, a one-component thermosetting epoxy resin, and specifically, a penguin cement 1069D (trade name) manufactured by Sunstar Giken Co., Ltd.

  The coating sealer 9 is a one-component thermosetting plastisol or the like, and specifically, Asahi Co., Ltd. 1680H (trade name), Nippon Special Paint Co., Ltd. M160 (trade name), or the like. Here, the plastisol is a sol-like paste in which a powdery resin is dispersed in a plasticizer and includes a filler stabilizer, a pigment, and the like.

  With the above configuration, the vehicle door 1 according to the present embodiment prevents electrolytic corrosion at the hemming portion (hem portion 4) between the two panels 2 and 3 made of different metals and protrudes the water-insoluble sealer 8. Can be prevented.

  Specifically, as shown in FIG. 2, the gap 11 on the opposite side of the outer panel 2 and the inner panel 3 is sealed by a water-insoluble sealer 8, thereby preventing water from entering the gap 11. can do. On the other hand, the gap 12 between the folded-back portion 6 on the distal end side of the outer panel 2 and the inner panel 3 is also sealed by the water-soluble sealer 7 and the paint sealer 9, so that water can be prevented from entering the gap 12. Thereby, the electrolytic corrosion of the outer panel 2 in the hem part 4 can be prevented.

  Moreover, in the vehicle door 1, the water-soluble sealer 7 and the water-insoluble sealer 8 are applied side by side in the direction toward the tip 6 a of the folded portion 6 in the hem portion 4 between the outer panel 2 and the inner panel 3. Have a structure. Therefore, since the water-insoluble sealer 8 is prevented from expanding into the hem part 4 by the water-soluble sealer 7, there is no possibility that the water-insoluble sealer 8 protrudes from the folded part 6 to the outside.

  Moreover, since the coating sealer 9 is applied to at least the front end portion 6a of the folded portion 6 in the hem portion 4, it is possible to reliably prevent water from entering from the front end portion 6a of the folded portion 6. The water-soluble sealer 7 is melted, and it is possible to reliably prevent the occurrence of electrolytic corrosion due to the accumulation of water in the melted portion.

  Below, the manufacturing method of the vehicle door 1 shown by FIGS. 1-2 is demonstrated as an example of the manufacturing method of the closure component for vehicles which concerns on this invention.

  As described above, the vehicle door 1 is manufactured by joining ends of two different types of metal plate materials, that is, an outer panel 2 made of an aluminum alloy and an inner panel 3 made of a steel plate.

  Specifically, first, as shown in FIG. 3, a water-soluble sealer 7 and a water-insoluble sealer are formed on at least one surface of the outer panel 2 and the inner panel 3 facing each other, for example, the surface of the outer panel 2. 8 are applied side by side in the direction toward the end 2a of the outer panel 2 such that the water-soluble sealer 7 is closer to the end 2a of the outer panel 2 than the water-insoluble sealer 8 is.

  Thereafter, the outer panel 2 and the inner panel 3 are temporarily joined via the water-insoluble sealer 8 and the water-soluble sealer 7 so that the outer panel 2 and the inner panel 3 face each other.

  Next, as shown in FIG. 4, the end 2a of the outer panel 2 is folded and hemmed so as to enclose the end 3a of the inner panel 3, thereby joining the end 3a of the inner panel 3 (at this time). As described above, the hem portion 4 having the ball portion 5 and the folded portion 6 is formed. At the same time, the water-soluble sealer 7 is expanded toward the end 2a of the outer panel 2 folded back by hemming.

  Specifically, in the step of expanding the water-soluble sealer 7, when the end portion 2a of the outer panel 2 is bent, the water-soluble sealer 7 located inside the outer panel 2 is pushed toward the end portion 2a of the outer panel 2, Is extended from the end 2a of the outer panel 2 to the outside.

  Next, as shown in FIG. 5, out of the expanded water-soluble sealer 7, the end portion 2 a of the outer panel 2 folded back by hemming, that is, the water-soluble sealer 7 protruding outside from the folded-back portion 6 is washed with water. To remove. In the case of washing with water, for example, the shower S is used for washing with water.

  In this way, the water-soluble sealer 7 and the water-insoluble sealer 8 are applied side by side in the direction toward the end 2a of the outer panel 2 so that only the water-soluble sealer 7 protrudes to the outside of the hem portion 4 so that the water-insoluble By preventing the sealer 8 from flowing out, it is possible to prevent electrolytic corrosion in the hem portion 4 between different metals and to prevent the water-insoluble sealer 8 from protruding.

  Further, although the water-soluble sealer 7 protrudes outside the hem portion 4, the protruding portion is not hardened and can be easily washed and removed, such as the vehicle door 1 and a jig for hemming. There is no risk of sticking to and remaining.

  Thereafter, as shown in FIG. 6, the water in which the water-soluble sealer 7 enters the hem portion 4 is applied by applying a coating sealer 9 in the vicinity of the end 2 a of the outer panel 2 from which the water-soluble sealer 7 has been washed away. Can be reliably prevented, and as a result, electrolytic corrosion of the outer panel 2 can be reliably prevented.

  As described above, in the present embodiment, the vehicle door has been described as an example of the vehicle closure component. However, the present invention is not limited to this, and the vehicle can be opened and closed, for example, the side. The present invention can also be applied to parts that can be opened and closed, such as doors, back doors, bonnets, trunk lids, and the like.

  In addition, since it can show | play said effect if it is between different metals, two metal plates from which an ionization tendency differs, such as between a magnesium alloy plate and a steel plate, other than between an aluminum alloy plate and a steel plate. Also for the joining, it is possible to prevent electrolytic corrosion in the hemming portion and to prevent the water-insoluble sealer from protruding.

  Furthermore, in this embodiment, an example in which the water-soluble sealer 7 and the water-insoluble sealer 8 are applied only to the outer panel 2 side to be hemmed is shown as an example of the present invention. It may be applied to both the outer panel 2 and the inner panel 3. In these cases as well, the above-described effects can be achieved.

Comparative example

  Here, as a comparative example, when the conventional vehicle door 21 shown in FIG. 7 is viewed, only the water-insoluble sealer 28 is interposed between the outer panel 22 made of aluminum alloy and the inner panel 23 made of steel plate. In this state, when the end portion 22a of the outer panel 22 is hemmed so that the water-insoluble sealer 28 does not protrude to the outside, the sealing effect by the water-insoluble sealer 28 is not sufficient. There is a risk that water W may enter the inside of the ball portion 25. For this reason, since the hem part 24 (especially the folding | returning part 26) of the outer panel 22 and the edge part 23a of the inner panel 23 contact via water, there exists a possibility that the outer panel 22 may be electrolytically corroded in the contact part.

  On the other hand, since the gap 31 between the outer panel 22 and the inner panel 23 is also small in the amount of water-insoluble sealer 28 filled, there is a possibility that the water W is accumulated and the outer panel 22 is eroded.

DESCRIPTION OF SYMBOLS 1 Vehicle door 2 Outer panel 2a End part 3 Inner panel 4 Hem part 5 Bump part 6 Folded part 6a Tip part 7 Water-soluble sealer 8 Water-insoluble sealer 9 Paint sealer 11, 12 Crevice

Claims (3)

In the method of manufacturing a vehicle closure part manufactured by joining the ends of two different types of metal plate materials,
A water-insoluble sealer and a water-soluble sealer are provided on at least one surface of the two metal plates facing each other, and the water-soluble sealer is closer to the end of the metal plate than the water-insoluble sealer. As described above, the step of arranging and coating in the direction toward the end of the metal plate,
Temporarily bonding the two metal plate materials through the water-insoluble sealer and the water-soluble sealer so that the metal plate materials are opposed to each other;
The end of one of the two metal plates is folded and hemmed so as to enclose the end of the other metal plate, and joined with the end of the other metal plate, Expanding the water-soluble sealer toward the end of the metal plate folded by hemming;
Of the expanded water-soluble sealer, the step of washing and removing the water-soluble sealer protruding from the end of the one metal plate folded back by hemming and the water-soluble sealer is washed and removed. And a step of applying a coating sealer in the vicinity of the end portion of the metal plate material. An outer panel made of a metal plate,
The outer panel and an inner panel made of a different type of metal plate,
The end portion of the outer panel is joined to the end portion of the inner panel by being folded and hemmed so as to include the end portion of the inner panel.
Among the hemmed parts, at least a part between the folded part and the inner panel, which is a folded part of the outer panel, is disposed with a water-soluble sealer,
Between the outer panel and the inner panel, a water-insoluble sealer is disposed at a position opposite to the tip of the folded portion of the water-soluble sealer,
A coating sealer is applied to at least the tip of the folded portion of the hemmed portion,
A vehicle closure part characterized by the above.   The closure part for vehicles according to claim 2 which is a door for vehicles.

Images