JP2021062675A - Manufacturing method of vehicle side door and vehicle side door - Google Patents

Abstract

To provide a manufacturing method of a vehicle side door which can inhibit occurrence of residual deformation in a sash and a door panel in manufacturing processes including a heating process, and to provide a vehicle side door.SOLUTION: A manufacturing method of a vehicle side door includes: a first heating step in which a first component 101 including a door panel body 20A formed of a first material having a first linear expansion coefficient is heated; a second heating step in which a second component 102 including sash bodies 60A, 70A formed of a second material having a second linear expansion coefficient different from the first linear expansion coefficient is heated; and a joint step in which the first component 101 and the second component 102 are joined after the first heating step and the second heating step.SELECTED DRAWING: Figure 4

Description

The present invention relates to a method for manufacturing a vehicle side door and a vehicle side door.

Patent Document 1 discloses a vehicle door structure for suppressing distortion generated in a door outer panel in a vehicle door formed by using a plurality of materials having different coefficients of thermal expansion. The vehicle door structure includes a door outer panel, a door inner panel joined to the door outer panel, and a frame portion. The frame portion is formed by using a material having a coefficient of thermal expansion different from the coefficient of thermal expansion of the door inner panel.

In paragraph 0009 of this Patent Document 1, the first jointed portion and the second joined portion provided on the door inner panel are projected toward the upper side of the vehicle than the upper end of the door outer panel when viewed from the outside of the vehicle. As a result, the expansion or contraction of the portion of the door inner panel facing the door outer panel is suppressed from being restricted by the frame portion, and as a result, the door inner panel faces the door outer panel. It is disclosed that the portion can be expanded or contracted following the door outer panel, and thus the distortion of the door outer panel due to the temperature change of the vehicle door can be suppressed.

Japanese Unexamined Patent Publication No. 2017-077784

In the vehicle door structure described in Patent Document 1, the coefficient of thermal expansion (linear expansion coefficient) of the inner panel and the coefficient of thermal expansion (linear expansion coefficient) of the frame portion are different from each other. When the vehicle door is heated and then cooled, the inner panel and the frame portion expand at different rates and then contract. In the vehicle door structure, a pair of front and rear lower end portions of one continuous frame portion are joined to the front end portion and the rear end portion of the inner panel. Therefore, one member of the inner panel and the frame constrains the other member so as to limit the expansion and contraction of the other member. Specifically, when the vehicle door is heated, the member having the smaller coefficient of linear expansion of the inner panel and the frame portion limits the expansion of the member having the larger coefficient of linear expansion. In particular, the expansion at the joint portion between the inner panel and the frame portion and the peripheral portion thereof is more limited as compared with other portions. Therefore, in each member of the inner panel and the frame portion, there is a difference between the degree of expansion during heating in the region near the joint portion and the degree of expansion during heating in the region far from the joint portion. This causes residual deformation in the inner panel (door panel) and the frame portion (sash).

An object of the present invention is a vehicle capable of suppressing residual deformation of the sash and the door panel in a manufacturing process including a heating step even if the materials constituting the sash and the material constituting the door panel have different linear expansion coefficients. To provide a method for manufacturing a side door for a vehicle and a side door for a vehicle.

Provided are a door panel body made of a first material having a first linear expansion coefficient and a second linear expansion coefficient attached to the door panel body that is different from the first linear expansion coefficient. A method for manufacturing a side door for a vehicle including a sash main body made of a second material, wherein the first heating step for heating the first component including the door panel main body and the sash main body are included. It includes a second heating step of heating the second part, and a joining step of joining the first part and the second part after the first heating step and the second heating step. ..

In this manufacturing method, in the stage prior to the joining step, the sash body does not limit the expansion and contraction of the door panel body and does not restrain the door panel body. Similarly, prior to the joining step, the door panel body does not limit the expansion and contraction of the sash body and does not constrain the sash body. Therefore, in the first heating step, the door panel body is allowed to expand and contract relatively freely, and in the second heating step, the sash body expands and contracts relatively freely. Is allowed. Then, after the first heating step and the second heating step, the first part and the second part are joined. Therefore, in the method for manufacturing the side door for a vehicle, even if the material constituting the sash main body and the material constituting the door panel main body have different linear expansion coefficients, the sash main body and the said sash main body and the said in the manufacturing process including the heating step. It is possible to suppress the occurrence of residual deformation in the door panel body.

Specifically, the method for manufacturing the side door for a vehicle includes, for example, a first coating film forming step of forming a first coating film on the surface of the door panel main body and a second coating film on the surface of the sash main body. The first heating step is performed after the first coating film forming step, and the second heating step is the second coating. It may be performed after the film forming step.

In this embodiment, the first heating step is a heating step such as a baking drying step and a heat curing step performed after the first coating film forming step, and the second heating step is the second heating step. This is a heating step such as a baking drying step and a heat curing step performed after the coating film forming step.

In the method for manufacturing a vehicle side door, the sash main body includes a front frame main body that constitutes a front side portion of the sash main body in the vehicle front-rear direction and a rear side that constitutes a rear portion of the sash main body in the vehicle front-rear direction. The second component may further include a reinforcing member body joined to one end of the front frame body and one end of the rear frame body, including a frame body.

When the second component includes the reinforcing member main body, the reinforcing member main body may be made of the second material.

In this aspect, since the material constituting the reinforcing member is the same second material as the material constituting the sash main body, the sash main body and the reinforcing member main body joined to each other are included in the second component. In the second heating step of being heated, residual deformation of the sash main body and the reinforcing member main body is suppressed.

When the second component includes the reinforcing member main body, the reinforcing member main body is made of the first material, and the second heating step is performed on the other end of the front frame main body and the reinforcing member main body. The other end of the front frame body and the other end of the rear frame body so that the other end of the rear frame body is allowed to displace relative to each other in the second heating step. It may be performed in a state where the part is temporarily fixed.

In this aspect, since the second heating step is performed in a state where the other end of the front frame body and the other end of the rear frame body are temporarily fixed, the second heating is performed. In the process, it is permissible for the other ends to be displaced relative to each other. Therefore, even if the material constituting the reinforcing member main body is the first material different from the second material constituting the sash main body, residual deformation may occur in the sash main body and the reinforcing member main body. It is suppressed.

In the method for manufacturing a side door for a vehicle, the first component may further include a reinforcing member main body joined to the door panel main body, and the reinforcing member main body may be made of the first material.

In this aspect, since the material constituting the reinforcing member main body is the same first material as the material constituting the door panel main body, the first component including the door panel main body and the reinforcing member main body joined to each other. In the first heating step in which the door panel body and the reinforcing member body are heated, residual deformation is suppressed from occurring in the door panel body and the reinforcing member body.

In the method for manufacturing a vehicle side door, the elastic modulus of the second material is preferably larger than the elastic modulus of the first material.

This aspect makes it possible to suppress the generation of wind noise from the sash during high-speed running, in addition to the above-mentioned effect of suppressing residual deformation. Specifically, it is as follows. When a vehicle such as an automobile travels, the negative pressure acting on the window glass surface of the side door may cause the sash to be attracted to the outside in the vehicle width direction and slightly bend and deform. In particular, as the traveling speed of the vehicle increases, the amount of deflection and deformation of the sash outward in the vehicle width direction with respect to the vehicle body also increases. Normally, the side door and the vehicle body are sealed via rubber seal parts, etc., but when the amount of deflection deformation increases, a gap is formed between the side door and the vehicle body, which causes wind noise. To do. In this aspect, the elastic modulus of the second material constituting the front frame and the rear frame is larger than the elastic modulus of the first material constituting the door panel main body. This makes it possible to impart rigidity to the sash and suppress the generation of the wind noise. Further, the imparting rigidity to the sash makes it possible to suppress an increase in the cross-sectional size of the sash and secure the visibility of the occupant.

In the method for manufacturing a side door for a vehicle, as a specific example of the combination of materials as described above, the first material is an aluminum alloy and the second material is steel. it can.

In the method for manufacturing a vehicle side door, the joining step preferably includes interposing an adhesive between the first part and the second part.

In this aspect, at the joining portion between the first part and the second part, the joining method using the adhesive and the bonding method different from the adhesive are used in combination. Since the joining portion is joined by the other joining method and is joined by the adhesive, the second component including the sash body is the door panel as compared with the case where only the other joining method is used. It is more firmly fixed to the first component including the main body. As a result, the sash body is strongly restrained by the door panel body, and as a result, the rigidity of the sash body is improved. Moreover, since the adhesive is interposed between the first component and the second component, even if the door panel main body and the sash main body are made of different metals from each other, they are different metals. The occurrence of galvanic corrosion (electrolytic corrosion) between them is suppressed. The other joining method is not particularly limited as long as it satisfies the joining characteristics required for the side door. Specific examples of the other joining method include a joining method by welding, a joining method by rivets, and a joining method by bolts.

Further, the provided vehicle side door includes a first component including a door panel main body made of a first material having a first linear expansion coefficient, and a second component having a first linear expansion coefficient different from the first component. A second component comprising a sash body composed of a second material having a coefficient of linear expansion and having a joint joined to the first component, wherein the first component is at least the door panel. It has a first coating film formed on the surface of the main body, and the second component has at least a second coating film formed on the surface of the sash main body, and at the joint portion, the door panel main body. The first coating film and the second coating film are interposed between the sash body and the sash body.

This vehicle side door can be manufactured by the above-mentioned vehicle side door manufacturing method. Therefore, in this vehicle side door, even if the linear expansion coefficients of the material constituting the sash main body and the material constituting the door panel main body are different from each other, residual deformation in the sash main body and the door panel main body is suppressed. Further, in this vehicle side door, since the first coating film and the second coating film are interposed between the door panel main body and the sash main body at the joint portion, the door panel main body and the sash main body Even when the doors are composed of dissimilar metals, the occurrence of galvanic corrosion between the dissimilar metals is suppressed.

As described above, according to the present invention, even if the materials constituting the sash main body and the materials constituting the door panel main body have different linear expansion coefficients, the sash main body and the door panel main body may be subjected to the manufacturing process including the heating step. It is possible to suppress the occurrence of residual deformation.

It is a side view which shows the side door for a vehicle manufactured by using the manufacturing method of the side door for a vehicle which concerns on 1st Embodiment. FIG. 5 is a cross-sectional view taken along the line II-II of FIG. It is sectional drawing which shows the modification of the front frame and the rear frame. It is a figure which shows the process of the manufacturing method of the side door for a vehicle which concerns on 1st Embodiment. 4 is a cross-sectional view taken along the line VV of FIG. 4 (B-1) and a cross-sectional view taken along the line VV of FIG. 4 (B-2). 4 is a cross-sectional view taken along the line VI-VI of FIG. 4 (C-1) and a cross-sectional view taken along the line VI-VI of FIG. 4 (C-2). It is a side view which shows the side door for a vehicle manufactured by using the manufacturing method of the side door for a vehicle which concerns on 2nd Embodiment. It is an enlarged side view of the part surrounded by the alternate long and short dash line VIII of FIG. 7. (A) is a cross-sectional view taken along the line IX-IX of FIG. Each of (B) and (C) is a cross-sectional view showing a state in which the upper end portion (the other end portion) of the front frame and the upper end portion (the other end) of the rear frame are displaced relative to each other. It is a figure which shows the process of the manufacturing method of the side door for a vehicle which concerns on 2nd Embodiment. It is a figure which shows the process of the manufacturing method of the side door for a vehicle which concerns on 3rd Embodiment. It is a figure which shows the process of the manufacturing method of the side door for a vehicle which concerns on the modification of 1st Embodiment.

A method for manufacturing a vehicle side door according to an embodiment of the present invention and a vehicle side door manufactured by the method will be described with reference to the drawings.

[First Embodiment]
FIG. 1 is a side view showing a vehicle side door 100 manufactured by using the manufacturing method according to the first embodiment, and is a view of the side door 100 viewed from the outside in the vehicle width direction of the vehicle. The side door 100 shown in FIG. 1 is a side door (front side door) on the front side of the automobile, and the side door manufactured by using the method for manufacturing the side door for a vehicle is a side door on the rear side of the automobile. (Rear side door) may be used.

The letters "front", "rear", "top", "bottom", "outside" and "inside" shown as appropriate in the drawings are directions based on the vehicle front-rear direction and the vehicle width direction, and are described above. The direction when the side door 100 is in a state where the door opening of the vehicle body shown in the drawing is closed (door closed state) is shown. Therefore, the "outside" character and the arrow indicate the outside in the vehicle width direction, and the "inside" character and the arrow indicate the inside in the vehicle width direction.

As shown in FIG. 1, the side door 100 includes a first component 101, a second component 102, and a third component. In the first embodiment, the first component 101 includes an inner panel 20 and a plurality of reinforcements. The second component 102 includes a waist reinforcing member 40 and a sash 50. The third component includes an outer panel 30. The first part 101, the second part 102, and the third part are integrated to form the side door 100.

The outer panel 30 is a plate-shaped member that constitutes the outer plate of the side door 100. The inner panel 20 is a plate-shaped member constituting the inner plate of the side door 100, and is arranged inside the outer panel 30 in the vehicle width direction. The inner panel 20 constitutes the door panel in the present invention. Only the outline of the outer panel 30 is illustrated by a two-dot chain line in FIG. The outer panel 30 is connected to the inner panel 20 by, for example, hemming the end portion in the front-rear direction and the end portion in the up-down direction. Each of the inner panel 20 and the outer panel 30 is produced, for example, by press-molding a metal plate.

The plurality of reinforcements include a pair of hinge reinforcements 121 and 122 for reinforcing a peripheral portion of a door hinge (not shown) at the front portion of the side door 100, and a door lock device (not shown) at the rear portion of the side door 100. Includes a lock reinforcement 123 for reinforcing the peripheral portion of the side door 100, and an impact beam 124 which is a long member of the side door 100 extending in the front-rear direction of the vehicle. The plurality of reinforcements 121 to 124 are joined to the inner panel 20.

The waist reinforcing member 40 constitutes the reinforcing member in the present invention. The waist reinforcing member 40 is a long member extending in the vehicle front-rear direction at the side door 100, and is arranged above the impact beam 124. Specifically, the waist reinforcing member 40 is a waist reinforcement arranged so as to extend in the vehicle front-rear direction along the waist line WL at the upper part of the inner panel 20. The waist reinforcing member 40 is joined to the inner panel 20 below the waist line WL of the side door 100.

The sash 50 forms a window frame for holding the window glass above the inner panel 20 and the outer panel 30. The sash 50 includes a front frame 60 that constitutes a front portion of the sash 50 and a rear frame 70 that constitutes a rear portion of the sash 50. The front frame 60 is a member that extends upward from the front end of the inner panel 20 along the side rails of the vehicle body (not shown) while the door is closed. The rear frame 70 is a member that extends upward from the rear end of the inner panel 20 along the center pillar of the vehicle body (not shown). The sash 50 may be directly connected to the inner panel 20, but in the present embodiment, the sash 50 is indirectly connected to the inner panel 20 via the waist reinforcing member 40.

Specifically, the lower end 61, which is one end of the front frame 60, is joined to the front end 41, which is one end in the longitudinal direction of the waist reinforcing member 40, and the front end of the waist reinforcing member 40. The portion 41 is joined to the front end portion 21 of the panel, which is the front end portion of the upper portion of the inner panel 20. The lower end 71, which is one end of the rear frame 70, is joined to the rear end 42, which is the other end of the waist reinforcing member 40 in the longitudinal direction, and the rear end of the waist reinforcing member 40. 42 is joined to the rear end portion 22 of the panel, which is the rear end portion of the upper part of the inner panel 20. The upper end 62, which is the other end of the front frame 60, is connected to the upper end 72, which is the other end of the rear frame 70.

FIG. 2 is a cross-sectional view taken along the line II-II of FIG. In FIG. 2, of the inner panel 20, the waist reinforcing member 40, and the sash 50, only the front region and the rear region are shown, and the region between them is omitted.

As shown in FIG. 2, the inner panel 20 has an inner panel main body 20A made of an aluminum alloy and a coating film 20B formed on the surface of the inner panel main body 20A.

The waist reinforcing member 40 has a reinforcing member main body 40A made of steel and a coating film 40B formed on the surface of the reinforcing member main body 40A.

The front frame 60 of the sash 50 has a front frame body 60A made of steel and a coating film 60B formed on the surface of the front frame body 60A. Similarly, the rear frame 70 of the sash 50 has a rear frame body 70A made of steel and a coating film 70B formed on the surface of the rear frame body 70A.

The aluminum alloy is an example of a first material having a first coefficient of linear expansion. As the aluminum alloy, for example, a 5000 series aluminum alloy, a 6000 series aluminum alloy, a 7000 series aluminum alloy, or the like is used. The steel is an example of a second material having a second coefficient of linear expansion. The coating film 20B of the inner panel 20 is an example of the first coating film. Each of the coating film 40B of the waist reinforcing member 40, the coating film 60B of the front frame 60, and the coating film 70B of the rear frame 70 is an example of the second coating film. The inner panel main body 20A is an example of a door panel main body. The front frame body 60A and the rear frame body 70A are examples of a sash body.

Each of the front frame main body 60A and the rear frame main body 70A may be formed by using an aluminum-plated steel plate. Further, the outer panel 30 is made of an aluminum alloy (first material). The plurality of reinforcements 121 to 124 are made of an aluminum alloy (first material).

The elastic modulus of the steel constituting the front frame 60 and the rear frame 70 is larger than the elastic modulus of the aluminum alloy constituting the inner panel 20.

The waist reinforcing member 40 and the sash 50 constituting the second component 102 are formed by an adhesive 90 at one or a plurality of positions with respect to the inner panel 20 constituting the first component 101. It is joined by the bonded adhesive layer 91. Further, although not essential, in the present embodiment, the waist reinforcing member 40 and the sash 50 are further formed on the inner panel 20 by a joining method different from the joining method using the adhesive 90. It is joined at one or more joints 92. Examples of the other joining method for forming the joining portion 92 include a joining method using rivets, a joining method using bolts, and the like. In the specific example shown in FIG. 2, the adhesive layer 91 and the joint portion 92 are formed at the same position, but the adhesive layer 91 and the joint portion 92 may be formed at different positions. ..

Each of the front frame 60 and the rear frame 70 of the sash 50 has, for example, a joining method by welding, a joining method by rivets, a joining method by bolts, a joining method by an adhesive, etc. to the waist reinforcing member 40. It is joined by.

As shown in FIG. 2, in the joint portion 92, the coating film 20B (first) of the inner panel 20 is sandwiched between the inner panel main body 20A, the reinforcing member main body 40A, and the front frame main body 60A. An example of a coating film) and the coating film 40B (an example of a second coating film) of the waist reinforcing member 40 are interposed. In the present embodiment, the inner panel main body 20A, the reinforcing member main body 40A, and the front frame main body 60A are used not only in the region corresponding to the joint portion 92 but also in the region corresponding to the entire reinforcing member main body 40A. It is preferable that the coating film 20B and the coating film 40B are interposed between the two.

As shown in FIG. 2, each of the front frame 60 and the rear frame 70 has, for example, a closed cross-section structure having excellent rigidity and a channel cross section forming a groove portion (not shown) for accommodating the edge of the window glass. Has a structure. In FIG. 2, the cross-sectional structure of the channel is not shown. As shown in FIG. 2, the closed cross-sectional structure of the front frame 60 is formed by an inner portion 601 located inside in the vehicle width direction and an outer portion 602 located outside in the vehicle width direction. Similarly, the closed cross-sectional structure of the rear frame 70 is formed by an inner portion 701 located inside in the vehicle width direction and an outer portion 702 located outside in the vehicle width direction. Each of the front frame 60 and the rear frame 70 is manufactured by, for example, roll molding a metal plate, but may be manufactured by a method other than roll molding, for example, press molding. When the press molding is used, for example, as shown in the cross-sectional view of FIG. 3, the inner portion 601 of the front frame 60 and the outer portion 602 of the front frame 60 are individually molded by the press molding. After that, they are joined to each other by using a joining method such as welding. The same applies to the method for producing the rear frame 70 when the press molding is used.

[Manufacturing method of side door]
FIG. 4 is a diagram showing a process of a method for manufacturing the vehicle side door 100 according to the first embodiment. 5A and 5B are a cross-sectional view taken along the line VV of FIG. 4 (B-1) and a cross-sectional view taken along the line VV of FIG. 4 (B-2). 6A and 6B are a cross-sectional view taken along the line VI-VI of FIG. 4 (C-1) and a cross-sectional view taken along the line VI-VI of FIG. 4 (C-2).

The manufacturing method according to the first embodiment includes a first preparatory step (A-1), a second preparatory step (A-2), a third preparatory step, and a first assembly step (B-). 1), a second assembly step (B-2), a third assembly step, a first coating film forming step (C-1), a first heating step (C-1), and a second The coating film forming step (C-2) and the second heating step (C-2), the third coating film forming step, the third heating step, and the joining step (D) are provided.

The first preparatory step (A-1) is a step of preparing a plurality of members constituting the first component 101. Specifically, in the first embodiment, the first preparation step (A-1) is a step of preparing the inner panel main body 20A of the inner panel 20 and the plurality of reinforcements 121 to 124. Is.

The second preparatory step (A-2) is a step of preparing a plurality of members constituting the second component 102. Specifically, in the first embodiment, in the second preparatory step (A-2), the reinforcing member main body 40A of the waist reinforcing member 40, the front frame main body 60A of the front frame 60, and the rear This is a step of preparing the rear frame main body 70A of the side frame 70.

The third preparatory step is a step of preparing one or a plurality of members constituting the third part. Specifically, in the first embodiment, the third preparation step is a step of preparing the outer panel main body of the outer panel 30 and the members attached thereto. In FIG. 4, the illustration of the third preparatory step is omitted.

The first assembly step (B-1) is a step of joining a plurality of members constituting the first component 101 to each other. Specifically, in the first embodiment, in the first assembly step (B-1), the plurality of reinforcements 121 to 124 are formed of the inner panel 20 by welding, rivets, bolts, adhesives, or the like. It is joined to the inner panel main body 20A.

The second assembly step (B-2) is a step of joining a plurality of members constituting the second component 102 to each other. Specifically, in the first embodiment, as shown in FIGS. 4 and 5, the second assembly step (B-2) involves the lower end 61 of the front frame body 60A and the rear frame body 70A. Each of the lower end portions 71 of the waist is joined to the reinforcing member main body 40A of the waist reinforcing member 40 at the joining portion 93 by, for example, a joining method by welding, a joining method by rivets, a joining method by bolts, a joining method by an adhesive, or the like.

The third assembly step is a step of joining the plurality of members to each other when the third part is composed of a plurality of members.

The first coating film forming step (C-1) is a step of forming a first coating film on the surfaces of a plurality of members joined to each other in the first assembling step (B-1). Specifically, in the first embodiment, as shown in FIGS. 4 and 6, the first coating film forming step (C-1) is performed on the surface of the plurality of members including the inner panel main body 20A. This is a step of forming the coating film 20B.

The first heating step (C-1) is a step performed after the first coating film forming step, and is composed of the plurality of members including the inner panel main body 20A and the coating film 20B. This is a step of heating the first component 101.

The second coating film forming step (C-2) is a step of forming a second coating film on the surfaces of a plurality of members joined to each other in the second assembly step (B-2). Specifically, in the first embodiment, as shown in FIGS. 4 and 6, the second coating film forming step (C-2) forms the coating film 40B on the surface of the reinforcing member main body 40A and at the same time. This is a step of forming the coating film 60B and the coating film 70B on the surfaces of the front frame main body 60A and the rear frame main body 70A.

The second heating step (C-2) is a step performed after the second coating film forming step, and includes the reinforcing member main body 40A and the coating film 40B, the front frame main body 60A, and the coating film. This is a step of heating the second component 102 composed of the 60B, the rear frame main body 70A, and the coating film 70B.

The third coating film forming step is a step of forming a coating film on the surfaces of a plurality of members joined to each other in the third assembling step.

The third heating step is a step performed after the third coating film forming step, and is a step of heating the third component composed of the plurality of members including the outer panel main body and the coating film. Is.

The type of coating used in each of the first to third coating film forming steps is not particularly limited. The coating can improve the rust prevention performance of metal members such as the inner panel main body 20A, the reinforcing member main body 40A, the front frame main body 60A, the rear frame main body 70A, and the outer panel main body. Rust coating is adopted. In the rust preventive coating, the coating film is formed on the metal member by electrodeposition coating such as cation coating. In the case of the electrodeposition coating, in the first to third heating steps, the metal member is baked and dried at a baking temperature of, for example, about 160 to 200 ° C.

The joining step (D) is a step performed after the first heating step (C-1), the second heating step (C-2), and the third heating step, and is the first step. This is a step of joining the component 101, the second component 102, and the third component. Specifically, in the first embodiment, as shown in FIG. 2, the waist reinforcing member 40 is joined to the inner panel 20 at a plurality of joining portions 92, for example, by a joining method using rivets or joining with bolts. It is joined by a joining method such as a method. The outer panel 30 is joined to the inner panel 20 by, for example, hemming the end portion in the front-rear direction and the end portion in the up-down direction.

The joining step (D) includes a step of interposing an adhesive 90 between the first component 101 and the second component 102. As the adhesive 90, for example, an adhesive of a type that cures at room temperature is used. In the first embodiment, as shown in FIG. 2, the inner panel main body 20A of the first component 101, the reinforcing member main body 40A of the second component 102, the front frame main body 60A, and the said. The coating films 20B and 40B are formed between the rear frame body 70A and the coating films 20B and 40B, and galvanic corrosion between dissimilar metals is suppressed. Therefore, in the joining step (D), the step of interposing the adhesive 90 can be omitted.

[Second Embodiment]
FIG. 7 is a side view showing a vehicle side door 100 manufactured by using the vehicle side door manufacturing method according to the second embodiment. FIG. 8 is an enlarged side view of the portion surrounded by the alternate long and short dash line VIII of FIG. 7. 9 (A) is a cross-sectional view taken along the line IX-IX of FIG. 9 (B) and 9 (C) are cross-sectional views showing a state in which the upper end portion 62 of the front frame main body 60A and the upper end portion 72 of the rear frame main body 70A are displaced relative to each other. FIG. 10 is a diagram showing a process of a method for manufacturing a vehicle side door according to a second embodiment.

The second embodiment differs from the first embodiment in the following points.

In the second embodiment, the reinforcing member main body 40A and the inner panel main body 20A are made of the aluminum alloy (an example of the first material), and the front frame main body 60A and the rear frame main body 70A are made of the steel (an example of the first material). It is composed of an example of a second material). That is, the reinforcing member main body 40A, the front frame main body 60A, and the rear frame main body 70A are made of different materials.

Further, in the second embodiment, in the second assembly step (B-2) shown in FIG. 10, the upper end portion 62 of the front frame main body 60A and the upper end portion 72 of the rear frame main body 70A are the second. The upper end portion 62 of the front frame main body 60A and the upper end portion 72 of the rear frame main body 70A are temporarily fixed so as to allow relative displacement in the heating step of the above, and the upper end portion 62 and the upper end portion 62 are temporarily fixed. The second heating step (C-2) shown in FIG. 10 is performed with the portion 72 temporarily fixed.

Further, in the second embodiment, in the joining step (D) shown in FIG. 10, the upper end portion 62 of the front frame main body 60A and the upper end portion 72 of the rear frame main body 70A are not displaced relative to each other. The upper end portion 62 and the upper end portion 72 are fixed to each other.

Other configurations and methods in the second embodiment are the same as those in the first embodiment. Hereinafter, the above-mentioned differences will be mainly described, and the description of the same configuration and method as in the first embodiment will be omitted.

As shown in FIG. 10, in the second assembly step (B-2) according to the second embodiment, each of the lower end portion 61 of the front frame main body 60A and the lower end portion 71 of the rear frame main body 70A is formed. , At the same position as the joining portion 93 shown in FIG. 5, the waist reinforcing member 40 is joined to the reinforcing member main body 40A by a joining method using an adhesive. The method of joining the lower end 61 of the front frame body 60A and the lower end 71 of the rear frame body 70A to the reinforcing member body 40A of the waist reinforcing member 40 is an adhesive as in the present embodiment. For example, a rivet joining method or a bolt joining method may be used instead of the joining method using.

Further, as shown in FIGS. 9A and 10, the second assembly step (B-2) according to the second embodiment includes a temporary fixing step. The temporary fixing step is a step performed before the second heating step (C-2).

In the temporary fixing step, the upper end portion 62 of the front frame main body 60A and the upper end portion 72 of the rear frame main body 70A are overlapped, and the upper end portions 62, 72 are overlapped with each other while being maintained. The front side of the front frame body 60A and the upper end portion 72 of the rear frame body 70A are allowed to be displaced relative to each other in the second heating step (C-2). This includes temporarily fixing the upper end portion 62 of the frame main body 60A and the upper end portion 72 of the rear frame main body 70A.

Specifically, as shown in FIGS. 7, 8 and 9 (A), the upper end portion 62 of the front frame main body 60A and the upper end portion 72 of the rear frame main body 70A are displaced relative to each other. It is configured to be switchable between an allowable temporary fixing state and a fixed state in which the relative displacement between them is restricted. The upper ends 62 and 72 are temporarily fixed or fixed by bolts 81 and nuts 82. The upper end 62 of the front frame body 60A has an insertion hole 84, the upper end 72 of the rear frame body 70A has an insertion hole 83, and the bolt 81 is inserted into these insertion holes 83, 84. In this state, the nut 82 is screwed into the bolt 81. As a result, the upper end portions 62 and 72 are temporarily fixed or fixed to each other. The bolt 81 and the nut 82 form a temporary fixing member 80 used in the temporary fixing step.

As shown in FIGS. 8 and 9 (A) to 9 (C), the bolt insertion hole 83 provided in the rear frame 70 has a shaft portion 81B of the bolt 81 inserted through the bolt insertion hole 83. It has dimensions that allow relative displacement with respect to the bolt insertion hole 83. That is, the bolt insertion hole 83 is an elongated hole whose dimension in the specific direction is larger than the dimension in the direction orthogonal to the specific direction. In the second embodiment, the dimension in the specific direction corresponds to the size of the bolt insertion hole 83 in the vehicle front-rear direction, and the dimension in the direction orthogonal to the specific direction is the upper and lower sides of the vehicle in the bolt insertion hole 83. Corresponds to the size of the direction. The dimension of the elongated hole in the specific direction may be larger than the width of the bolt 81 in the head 81A (the size of the head 81A in the direction orthogonal to the axial direction of the shaft portion 81B). It is more desirable that the width of the bolt 81 is smaller than the width of the head 81A. On the other hand, the dimension of the elongated hole in the direction orthogonal to the specific direction is smaller than the width of the bolt 81 at the head 81A. The surface of the head 81A faces the surface of the rear frame 70 continuous with the edge defining the elongated hole in the axial direction.

In the second embodiment, as shown in FIG. 8, the specific direction of the elongated hole is a substantially anteroposterior direction. The bolt insertion hole 83 provided in the rear frame main body 70A is not limited to a long hole, and may have another hole shape such as a circular hole or a polygonal hole. Further, the bolt insertion hole 84 of the front frame body 60A may be a long hole, and the bolt insertion hole 83 of the rear frame body 70A may have a hole shape other than the long hole. Further, each of the bolt insertion hole 84 of the front frame body 60A and the bolt insertion hole 83 of the rear frame body 70A may have the other hole shapes other than the elongated hole.

In the second embodiment, after the second assembly step (B-2) including the temporary fixing step is performed, the second coating film forming step (C-2) and the second coating film forming step (C-2) shown in FIG. 10 are performed. The heating step (C-2) is performed. Since the second coating film forming step (C-2) in the second embodiment is the same as that in the first embodiment, the description thereof will be omitted.

In the second embodiment, the upper end portion 62 of the front frame main body 60A and the upper end portion 72 of the rear frame main body 70A are temporarily fixed, and the second heating step (C-) shown in FIG. 2) is performed. That is, in the second heating step (C-2), the second component is in a state where the upper end portion 62 of the front frame main body 60A and the upper end portion 72 of the rear frame main body 70A are not fixed. This is a step of heating 102. In this second heating step (C-2), the upper end portion 62 of the front frame main body 60A and the upper end portion 72 of the rear frame main body 70A are allowed to be displaced relative to each other. Therefore, even if the material constituting the reinforcing member main body 40A is different from the material constituting the sash main body (the front frame main body 60A and the rear frame main body 70A), it remains in the sash main body and the reinforcing member main body. Deformation is suppressed.

In the second embodiment, in the joining step (D) shown in FIG. 10, the upper end portion 62 of the front frame main body 60A and the upper end portion 72 of the rear frame main body 70A are not displaced relative to each other. A fixing step of fixing the 62 and the upper end portion 72 to each other is included.

In the fixing step, after the second heating step (C-2), the temperature of the second component 102 is lower than the temperature in the second heating step (C-2) (for example, to room temperature). This is a step of fixing (joining) the upper end portion 62 of the front frame main body 60A and the upper end portion 72 of the rear frame main body 70A in the lowered state). The upper ends 62 and 72 are fixed to each other by using the bolt 81 and the nut 82. That is, the temporary fixing member 80 used in the temporary fixing step is also used as a fixing member 80 (joining member) in the fixing step.

Specifically, in the fixing step, the upper end portion 62 of the front frame main body 60A and the upper end portion 72 of the rear frame main body 70A have a second tightening torque larger than the first tightening torque in the temporary fixing step. Are fixed to each other by the bolt 81. The first tightening torque is such that in the second heating step (C-2), the upper end portion 62 of the front frame main body 60A and the upper end portion 72 of the rear frame main body 70A are relative to each other. Is the tightening torque that allows. The second tightening torque is a tightening torque that regulates the relative displacement of the upper end portion 62 and the upper end portion 72 with respect to each other.

[Third Embodiment]
FIG. 11 is a diagram showing a process of a method for manufacturing a vehicle side door according to a third embodiment.

The third embodiment differs from the first embodiment in the following points.

In the third embodiment, the reinforcing member main body 40A and the inner panel main body 20A are made of the aluminum alloy (an example of the first material), and the front frame main body 60A and the rear frame main body 70A are made of the steel (an example of the first material). It is composed of an example of a second material). That is, the reinforcing member main body 40A and the inner panel main body 20A are made of the same material.

In a third embodiment, the first component 101 includes an inner panel body 20A, a reinforcing member body 40A, and a plurality of reinforcements 121-124, while the second component 102 comprises. The reinforcing member main body 40A is not included.

In the third embodiment, in the first assembly step (B-1) shown in FIG. 11, the reinforcing member main body 40A is joined to the inner panel main body 20A, while the second as shown in FIG. In the assembly step (B-2), the reinforcing member main body 40A is not joined to the front frame main body 60A and the rear frame main body 70A.

In the third embodiment, in the first coating film forming step (C-1) shown in FIG. 11, the inner panel main body 20A and the reinforcing member main body joined to each other in the first assembly step (B-1). The coating film 20B and the coating film 40B forming the first coating film are formed on the surfaces of a plurality of members including 40A. Then, in the first heating step (C-1), the first component 101 including the inner panel main body 20A, the reinforcing member main body 40A, and the coating films 20B and 40B is heated.

In the third embodiment, in the joining step (D) shown in FIG. 11, the first part 101, the second part 102, and the third part are joined. Specifically, in the third embodiment, the lower end portion 61 of the front frame main body 60A and the lower end portion 71 of the rear frame main body 70A refer to the front end portion 41 and the rear end portion 42 of the reinforcing member main body 40A. For example, it is joined by a joining method such as a joining method using rivets or a joining method using bolts.

Further, in the third embodiment, the joining step (D) includes a step of interposing an adhesive 90 between the first component 101 and the second component 102. In this step, the adhesive 90 is applied between the lower end 61 of the front frame body 60A and the lower end 71 of the rear frame body 70A and the front end 41 and the rear end 42 of the reinforcing member body 40A. Intervene. As the adhesive 90, for example, an adhesive of a type that cures at room temperature is used as in the first embodiment. In the joining step (D) of the third embodiment, the step of interposing the adhesive 90 can be omitted as in the first embodiment.

In the third embodiment, since the material constituting the reinforcing member main body 40A is the same aluminum alloy as the material constituting the inner panel main body 20A, the inner panel main body 20A and the reinforcing member main body joined to each other are used. In the first heating step (C-1) in which the first component 101 including 40A is heated, residual deformation of the inner panel main body 20A and the reinforcing member main body 40A is suppressed.

Since the other configurations and methods in the third embodiment are the same as those in the first embodiment, their description will be omitted.

[Modification example]
The present invention is not limited to the embodiments described above. The present invention includes, for example, the following forms.

(A) Reinforcing member The method for manufacturing a vehicle side door and the vehicle side door 100 according to the embodiment include a waist reinforcing member 40, but the reinforcing member is as shown in a modified example shown in FIG. 40 is optional. In the modified example shown in FIG. 12, the first component 101 includes the inner panel 20 but does not include the waist reinforcing member 40. The second component 102 includes a sash 50 but does not include a waist reinforcing member 40.

(B) Door Panel Main Body In the method for manufacturing a vehicle side door and the vehicle side door 100 according to the embodiment, the door panel main body is composed of the inner panel main body 20A, and the door panel main body is the outer panel main body. It may be composed of.

(C) Temporary Fixing Step In the second embodiment, the case where the upper end portions 62 and 72 are temporarily fastened to each other by the bolt 81 and the nut 82 in the temporary fixing step is illustrated, but the present invention is not limited to this. .. For example, in the temporary fixing step, the upper end portions 62, 72 may be temporarily fixed by a narrowing member sandwiching them.

(D) Heating Step In the above embodiment, the heating step is a heating step such as a baking drying step and a heat curing step performed after the coating film forming step, but the heating step is not limited to this. It may be a step other than the heat curing step.

(E) Fixing Step In the second embodiment, in the fixing step included in the joining step (D), the fixing method (joining method) for fixing the upper end portions 62 and 72 to each other is the bolt 81 and the nut. The method is not limited to the one using 82, and for example, a fixing method by welding, a fixing method by rivets, or the like may be used.

(F) Arrangement of Inner Panel, Sash and Waist Reinforcing Member In the embodiment, as shown in FIGS. 1, 2 and 7, for example, the inner panel 20, the waist reinforcing member 40 and the sash 50 (front frame). 60, the rear frame 70) are arranged so as to be arranged in this order in the vehicle width direction at these joint portions, but the arrangement is not limited to this. The inner panel 20, the sash 50 (front frame 60, rear frame 70), and the waist reinforcing member 40 may be arranged so as to be arranged in this order in the vehicle width direction at these joint portions.

(G) Joining of Waist Reinforcing Member and Sash In the above embodiment, as shown in FIGS. 1, 2 and 7, for example, the waist reinforcing member 40 and the sash 50 (front frame 60, rear frame 70). Is directly joined, but is not limited to such an embodiment.

For example, the waist reinforcing member 40 and the sash 50 (front frame 60, rear frame 70) may be joined (connected) via other members. Specifically, the lower end 61 of the front frame 60 of the sash 50 is joined to the hinge reinforcement constituting the other member, and the front end 41 of the waist reinforcing member 40 is joined to the hinge reinforcement. Aspects can be mentioned. Further, an embodiment in which the lower end portion 71 of the rear frame 70 of the sash 50 is joined to the lock reinforcement that constitutes the other member, and the rear end portion 42 of the waist reinforcing member 40 is joined to the lock reinforcement. Can be mentioned. The other member may be made of the first material or may be made of the second material.

Further, the waist reinforcing member 40, the sash 50 (front frame 60, rear frame 70), and other members may be joined at overlapping positions in the vehicle width direction. Specifically, the front end 41 of the waist reinforcing member 40, the lower end 61 of the front frame 60 of the sash 50, and the hinge reinforcements constituting the other members are joined at overlapping positions in the vehicle width direction. , The rear end 42 of the waist reinforcing member 40, the lower end 71 of the rear frame 70 of the sash 50, and the lock reinforcements constituting the other members are joined at overlapping positions in the vehicle width direction. Aspects can be mentioned. In this case, the order in which the waist reinforcing member 40, the sash 50 (front frame 60, rear frame 70), and the other members are arranged in the vehicle width direction is not particularly limited. The other member may be made of the first material or may be made of the second material.

20 Inner panel 20A Inner panel inner panel body 20B Inner panel coating film 40 Waist reinforcing member 40A Waist reinforcing member reinforcing member body 40B Waist reinforcing member coating film 50 Sash 60 Front frame 60A Front frame front frame body 60B Front frame 70A Rear frame 70A Rear frame body 70B Rear frame coating 90 Adhesive 91 Adhesive layer 92 Joint 100 Vehicle side door 101 First part 102 Second part

Claims (10)

With a door panel body made of a first material having a first linear expansion coefficient and a second material attached to the door panel body and having a second linear expansion coefficient different from the first linear expansion coefficient. It is a method of manufacturing a side door for a vehicle including a sash body composed of
A first heating step for heating the first component including the door panel body, and
A second heating step of heating the second component including the sash body, and
After the first heating step and the second heating step, a joining step of joining the first part and the second part,
How to manufacture side doors for vehicles, including. The first coating film forming step of forming the first coating film on the surface of the door panel main body, and
A second coating film forming step of forming a second coating film on the surface of the sash body is further included.
The first heating step is performed after the first coating film forming step.
The second heating step is performed after the second coating film forming step.
The method for manufacturing a vehicle side door according to claim 1. The sash body
The front frame body that constitutes the front part of the sash body in the front-rear direction of the vehicle,
Includes a rear frame body that constitutes the rear portion of the sash body in the vehicle front-rear direction.
The second component further includes a reinforcing member body joined to one end of the front frame body and one end of the rear frame body.
The method for manufacturing a vehicle side door according to claim 1 or 2. The reinforcing member main body is made of the second material.
The method for manufacturing a vehicle side door according to claim 3. The reinforcing member main body is made of the first material.
The front side of the second heating step allows the other end of the front frame body and the other end of the rear frame body to be displaced relative to each other in the second heating step. This is performed in a state where the other end of the frame body and the other end of the rear frame body are temporarily fixed.
The method for manufacturing a vehicle side door according to claim 3. The first component further includes a reinforcing member body joined to the door panel body.
The reinforcing member main body is made of the first material.
The method for manufacturing a vehicle side door according to claim 1 or 2. The elastic modulus of the second material is larger than the elastic modulus of the first material.
The method for manufacturing a vehicle side door according to any one of claims 1 to 6. The first material is an aluminum alloy.
The second material is steel.
The method for manufacturing a vehicle side door according to claim 7. The joining step comprises interposing an adhesive between the first part and the second part.
The method for manufacturing a vehicle side door according to any one of claims 1 to 8. A first component, including a door panel body, made of a first material having a first coefficient of linear expansion,
A second component comprising a sash body composed of a second material having a second coefficient of linear expansion different from the first coefficient of linear expansion and having a joint joined to the first component. With
The first component has at least a first coating film formed on the surface of the door panel body.
The second component has at least a second coating film formed on the surface of the sash body.
In the joint portion, the first coating film and the second coating film are interposed between the door panel main body and the sash main body.
Vehicle side doors.

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