JP7350609B2 - Manufacturing method of vehicle side door - Google Patents

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 whose purpose is to suppress distortion occurring in a door outer panel in a vehicle door formed 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 using a material having a coefficient of thermal expansion different from that of the door inner panel.

Paragraph 0009 of Patent Document 1 states that the first joined part and the second joined part provided on the door inner panel protrude above the vehicle from the end of the door outer panel on the vehicle upper side 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 portion of the door inner panel facing the door outer panel is suppressed from being restricted by the frame portion. It is disclosed that the portion can expand or contract following the door outer panel, and that distortion of the door outer panel due to temperature changes of the vehicle door can be suppressed.

Japanese Patent Application 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 (coefficient of linear expansion) of the frame portion are different from each other. When the vehicle door is heated and then cooled, the inner panel and the frame 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 a front end portion and a rear end portion of the inner panel. Therefore, one member of the inner panel and the frame restrains the other member to limit expansion and contraction of the other member. Specifically, when the vehicle door is heated, the member with a smaller coefficient of linear expansion among the inner panel and the frame portion limits the expansion of the member with a larger coefficient of linear expansion. In particular, expansion at the joint portion between the inner panel and the frame portion and the surrounding portion thereof is more restricted than at other portions. Therefore, in each member of the inner panel and the frame portion, a difference occurs between the degree of expansion during heating in a region close to the joint portion and the degree of expansion during heating in a region far from the joint portion. This causes residual deformation to occur in the inner panel (door panel) and the frame portion (sash).

An object of the present invention is to provide a vehicle capable of suppressing residual deformation of the sash and the door panel during the manufacturing process including the heating process, even if the coefficients of linear expansion of the material forming the sash and the material forming the door panel are different from each other. An object of the present invention is to provide a method for manufacturing a side door for a vehicle, and a side door for a vehicle.

What is provided is a door panel body made of a first material having a first coefficient of linear expansion, and a door panel body attached to the door panel body and having a second coefficient of linear expansion different from the first coefficient of linear expansion. a sash body made of a second material comprising: a first heating step of heating a first component including the door panel body; a second heating step of heating the second component; and a joining step of joining the first component and the second component after the first heating step and the second heating step. .

In this manufacturing method, at a stage before the joining step, the sash body does not restrict expansion and contraction of the door panel body, and does not restrain the door panel body. Similarly, at a stage prior to the joining process, the door panel body does not restrict expansion and contraction of the sash body and does not restrain 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 is allowed to expand and contract relatively freely. is allowed. After the first heating step and the second heating step, the first component and the second component are joined. Therefore, in the method for manufacturing a vehicle side door, even if the linear expansion coefficients of the material constituting the sash body and the material constituting the door panel body are different from each other, the sash body and the It is possible to suppress residual deformation from occurring in the door panel body.

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

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

In the method for manufacturing a side door for a vehicle, the sash body includes a front frame body that constitutes a front part of the sash body in the longitudinal direction of the vehicle, and a rear frame body that constitutes a rear part of the sash body in the longitudinal direction of the vehicle. a frame main body, and the second component may further include a reinforcing member main body joined to one end of the front frame main body and one end of the rear frame main 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 body, the second component including the sash body and the reinforcing member body joined to each other is In the second heating step, residual deformation of the sash body and the reinforcing member body is suppressed.

Further, 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 includes heating 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 as to allow the other end of the rear frame body to be displaced relative to each other in the second heating step; This may be done with the parts temporarily fastened together.

In this aspect, the second heating step is performed in a state where the other end of the front frame main body and the other end of the rear frame main body are temporarily fixed, so that the second heating step In the process, the other ends are allowed to be displaced relative to each other. Therefore, even if the material constituting the reinforcing member body is the first material different from the second material constituting the sash body, residual deformation may not occur in the sash body and the reinforcing member body. suppressed.

In the method for manufacturing a vehicle side door, 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, it is preferable that the second material has a larger elastic modulus than the first material.

In addition to the effect of suppressing the residual deformation described above, this aspect makes it possible to suppress the generation of wind noise from the sash during high-speed running. Specifically, it is as follows. When a vehicle such as an automobile is running, the sash may be drawn outward in the width direction of the vehicle due to negative pressure acting on the window glass surface of the side door, causing the sash to be slightly bent and deformed. In particular, as the traveling speed of the vehicle increases, the amount of deflection 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 a rubber seal, 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. do. In this aspect, the elastic modulus of the second material forming the front frame and the rear frame is greater than the elastic modulus of the first material forming the door panel body. This makes it possible to impart rigidity to the sash and suppress the occurrence of the wind noise. Furthermore, imparting rigidity to the sash makes it possible to suppress an increase in the cross-sectional size of the sash and ensure visibility for the occupant.

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

In the method for manufacturing a vehicle side door, it is preferable that the joining step includes interposing an adhesive between the first component and the second component.

In this aspect, the bonding method using the adhesive and a bonding method other than the adhesive are used together at the bonding site between the first component and the second component. Since the joining portion is joined by the other joining method and also by the adhesive, the second component including the sash body is attached to the door panel, compared to a case where only the other joining method is used. It is more firmly fixed to the first component including the main body. Thereby, 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 part and the second part, even if the door panel main body and the sash main body are made of different metals, they can be made of different metals. The occurrence of galvanic corrosion (electrolytic corrosion) between the two is suppressed. Note that 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 methods include a welding method, a rivet joining method, a bolt joining method, and the like.

Further, the provided vehicle side door includes a first component including a door panel body made of a first material having a first coefficient of linear expansion, and a second component having a coefficient of linear expansion different from the first coefficient of linear expansion. a second part including a sash body made of a second material having a coefficient of linear expansion and having a joint part joined to the first part, wherein the first part is at least connected to the door panel. The second component has a first coating film formed on the surface of the sash body, and the second component has a second coating film formed on at least the surface of the sash body, and the door panel 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 method for manufacturing a vehicle side door described above. Therefore, in this vehicle side door, even if the linear expansion coefficients of the material forming the sash body and the material forming the door panel body are different from each other, residual deformation in the sash body and the door panel body is suppressed. Further, in this vehicle side door, the first coating film and the second coating film are interposed between the door panel body and the sash body at the joint portion, so that the door panel body and the sash body are interposed between the door panel body and the sash body. Even if they are made of different metals, the occurrence of electrolytic corrosion between the different metals is suppressed.

As described above, according to the present invention, even if the linear expansion coefficients of the material constituting the sash body and the material constituting the door panel body are different from each other, the sash body and the door panel body are Residual deformation can be suppressed from occurring.

FIG. 2 is a side view showing a vehicle side door manufactured using the method for manufacturing a vehicle side door according to the first embodiment. 2 is a sectional view taken along line II-II in FIG. 1. FIG. It is a sectional view showing a modification of the front frame and the rear frame. It is a figure showing the process of the manufacturing method of the side door for vehicles concerning a 1st embodiment. 4. They are a cross-sectional view taken along line VV in (B-1) of FIG. 4, and a cross-sectional view taken along line VV in FIG. 4 (B-2). 4. They are a cross-sectional view taken along line VI-VI in (C-1) of FIG. 4, and a cross-sectional view taken along line VI-VI in FIG. 4 (C-2). It is a side view which shows the side door for vehicles manufactured using the manufacturing method of the side door for vehicles concerning 2nd Embodiment. FIG. 8 is an enlarged side view of a region surrounded by a dashed-dotted line VIII in FIG. 7; (A) is a sectional view taken along line IX-IX in FIG. 8. Each of (B) and (C) is a sectional view showing a state in which the upper end (other end) of the front frame and the upper end (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 vehicle side door based on 2nd Embodiment. It is a figure which shows the process of the manufacturing method of the vehicle side door based on 3rd Embodiment. It is a figure which shows the process of the manufacturing method of the vehicle side door based 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 thereby will be described with reference to the drawings.

[First embodiment]
FIG. 1 is a side view showing a vehicle side door 100 manufactured 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. The side door 100 shown in FIG. 1 is a front side door of an automobile, but the side door manufactured using the method for manufacturing a vehicle side door is a rear side door of an automobile. (rear side door).

The words "front", "rear", "top", "bottom", "outside", and "inside" shown as appropriate in the drawings and arrows are directions based on the vehicle longitudinal direction and the vehicle width direction, and This shows the direction when the side door 100 is in a state where the door opening of the vehicle body (not shown) is closed (door closed state). Therefore, the character "outside" and the arrow indicate the outside in the vehicle width direction, and the character "inside" 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 panel of the side door 100. The inner panel 20 is a plate-shaped member that constitutes an inner plate of the side door 100, and is arranged on the inner side of the outer panel 30 in the vehicle width direction. The inner panel 20 constitutes a door panel in the present invention. In FIG. 1, only the outline of the outer panel 30 is illustrated by a two-dot chain line. The outer panel 30 is coupled to the inner panel 20 by, for example, hemming the ends in the front-rear direction and the ends 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 the peripheral portion of a door hinge (not shown) at the front of the side door 100, and a door lock device (not shown) at the rear of the side door 100. and an impact beam 124 that is a long member extending in the longitudinal direction of the vehicle at the side door 100. The plurality of reinforcements 121 to 124 are joined to the inner panel 20.

The waist reinforcing member 40 constitutes a reinforcing member in the present invention. The waist reinforcing member 40 is a long member extending in the longitudinal direction of the vehicle in the side door 100, and is disposed above the impact beam 124. Specifically, the waist reinforcing member 40 is a waist reinforcement disposed above the inner panel 20 so as to extend in the longitudinal direction of the vehicle along the waist line WL. 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 a 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 while curving rearward along an unillustrated side rail of the vehicle body when the door is closed. The rear frame 70 is a member that extends upward from the rear end of the inner panel 20 along an unillustrated center pillar of the vehicle body. The sash 50 may be directly connected to the inner panel 20, but in this embodiment, it is indirectly connected to the inner panel 20 via the waist reinforcing member 40.

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

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

As shown in FIG. 2, the inner panel 20 includes 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 includes 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 includes 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 includes 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, 5000 series aluminum alloy, 6000 series aluminum alloy, 7000 series aluminum alloy, etc. are 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 a 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 a 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 sash bodies.

Note that each of the front frame main body 60A and the rear frame main body 70A may be formed 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 aluminum alloy (first material).

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

The waist reinforcing member 40 and the sash 50 constituting the second component 102 are formed with adhesive 90 at one or more locations on the inner panel 20 constituting the first component 101. They are bonded by an adhesive layer 91. Although not essential, in the present embodiment, the waist reinforcing member 40 and the sash 50 are further formed with respect to the inner panel 20 by a joining method different from the joining method using the adhesive 90. They are joined at one or more joints 92 . Examples of the other joining method for forming the joint 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 part 92 are formed at the same position, but the adhesive layer 91 and the joint part 92 may be formed at different positions. .

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

As shown in FIG. 2, in the joint portion 92, the coating film 20B (first coating film) of the inner panel 20 is located 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 addition, in this embodiment, the inner panel main body 20A, the reinforcing member main body 40A, and the front frame main body 60A are connected 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-sectional structure with excellent rigidity and a channel cross-section that forms a groove (not shown) for accommodating the edge of the window glass. has a structure. In FIG. 2, illustration of the channel cross-sectional structure is omitted. As shown in FIG. 2, the closed cross-sectional structure of the front frame 60 is formed by an inner portion 601 located on the inside in the vehicle width direction and an outer portion 602 located on the 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 on the inside in the vehicle width direction and an outer portion 702 located on the outside in the vehicle width direction. Each of the front frame 60 and the rear frame 70 is manufactured by, for example, roll-forming a metal plate, but may be manufactured by a method other than roll-forming, such as press molding. When the press molding is used, for example, as shown in the cross-sectional view of FIG. 3, the inner part 601 of the front frame 60 and the outer part 602 of the front frame 60 are individually formed by the press molding. After that, they are joined together using a joining method such as welding. The same applies to the method for manufacturing the rear frame 70 when the press molding is used.

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

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

The first preparation 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. It is.

The second preparation step (A-2) is a step of preparing a plurality of members constituting the second component 102. Specifically, in the first embodiment, the second preparation step (A-2) includes 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 preparation step is a step of preparing one or more members constituting the third component. 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, illustration of the third preparation 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, the first assembly step (B-1) involves attaching the plurality of reinforcements 121 to 124 to the inner panel 20 by, for example, welding, rivets, bolts, adhesives, etc. 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) includes the lower end portion 61 of the front frame body 60A and the rear frame body 70A. Each of the lower end portions 71 of the waist reinforcing member 40 is joined to the reinforcing member main body 40A of the waist reinforcing member 40 at the joining portion 93 by, for example, welding, rivets, bolts, adhesive, or the like.

The third assembly step is a step of joining the plurality of members to each other when the third component 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 the plurality of members joined together in the first assembly step (B-1). Specifically, in the first embodiment, as shown in FIGS. 4 and 6, the first coating film forming step (C-1) coats the surfaces of the plurality of members including the inner panel main body 20A. This is a step of forming a coating film 20B.

The first heating step (C-1) is a step that is performed after the first coating film forming step, and is a step that is performed after the first coating film forming step, and the heating step (C-1) is a step that is performed after the first coating film forming step, and the heating step (C-1) is a step that is performed after the first coating film forming step. 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 the plurality of members joined together 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) includes forming a coating film 40B on the surface of the reinforcing member main body 40A, and This is a step of forming a coating film 60B and a coating film 70B on the surfaces of the front frame body 60A and the rear frame body 70A.

The second heating step (C-2) is a step performed after the second coating film forming step, and is a step performed after the second coating film forming step, in which the reinforcing member main body 40A and the coating film 40B, the front frame main body 60A and the coating film 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 the plurality of members joined together in the third assembly 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 constituted by the plurality of members including the outer panel body and the coating film. It is.

The type of coating used in each of the first to third coating film forming steps is not particularly limited. The coating may be, for example, an anti-rust coating that 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 paint is used. In the antirust coating, the coating film is formed on the metal member by, for example, electrodeposition coating such as cationic 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 a step performed after the first heating step (C-1), the second heating step (C-2), and the third heating 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 connected to the inner panel 20 at a plurality of joints 92 by, for example, a joining method using rivets or a joining method using 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 ends in the front-rear direction and the ends in the up-down direction.

The bonding 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 hardens at room temperature is used. In the first embodiment, as shown in FIG. 2, the inner panel body 20A of the first component 101, the reinforcing member body 40A of the second component 102, the front frame body 60A, and the The coating films 20B and 40B are formed between the rear frame body 70A and the electrolytic corrosion between dissimilar metals is suppressed. Therefore, in the bonding 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 using the vehicle side door manufacturing method according to the second embodiment. FIG. 8 is an enlarged side view of the region surrounded by the dashed-dotted line VIII in FIG. FIG. 9(A) is a cross-sectional view taken along line IX-IX in FIG. Each of FIGS. 9(B) and 9(C) is a sectional view showing a state in which the upper end 62 of the front frame main body 60A and the upper end 72 of the rear frame main body 70A are displaced relative to each other. FIG. 10 is a diagram showing steps of a method for manufacturing a vehicle side door according to the 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 a 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 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.

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

Moreover, in the second embodiment, in the joining step (D) shown in FIG. 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 explained, and explanations of the same configuration and method as those of 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 61 of the front frame main body 60A and the lower end 71 of the rear frame main body 70A is , is joined to the reinforcing member main body 40A of the waist reinforcing member 40 at the same position as the joining part 93 shown in FIG. 5 by a joining method using an adhesive. Note that the lower end 61 of the front frame main body 60A and the lower end 71 of the rear frame main body 70A are joined to the reinforcing member main body 40A of the waist reinforcing member 40 using an adhesive as in this embodiment. For example, a joining method using rivets or a joining method using bolts may be used instead of the joining method using rivets.

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

The temporary fixing step includes overlapping 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, and keeping these upper end portions 62, 72 overlapped with each other. , the front side so as to allow the upper end 62 of the front frame main body 60A and the upper end 72 of the rear frame main body 70A to be relatively displaced from each other in the second heating step (C-2). This includes temporarily fixing the upper end 62 of the frame main body 60A and the upper end 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 have a relative displacement between them. It is configured to be switchable between a temporarily fixed state in which it is allowed and a fixed state in which relative displacement between them is regulated. These upper end portions 62 and 72 are temporarily fastened or fixed to each other with bolts 81 and nuts 82. The upper end 62 of the front frame main body 60A has an insertion hole 84, the upper end 72 of the rear frame main 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 onto the bolt 81. As a result, the upper end portions 62 and 72 are temporarily fastened or fixed to each other. The bolt 81 and the nut 82 constitute a temporary fixing member 80 used in the temporary fixing step.

As shown in FIGS. 8 and 9(A) to (C), the bolt insertion hole 83 provided in the rear frame 70 has a shaft portion 81B of the bolt 81 inserted into 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 a long hole whose dimension in a specific direction is larger than the dimension in a direction perpendicular 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 longitudinal direction of the vehicle, and the dimension in the direction perpendicular to the specific direction corresponds to the size of the bolt insertion hole 83 in the vehicle longitudinal direction. Corresponds to the magnitude in the direction. The dimension of the elongated hole in the specific direction may be larger than the width of the head 81A of the bolt 81 (the size of the head 81A in the direction perpendicular to the axial direction of the shaft portion 81B); It is more desirable that the width be smaller than the width at the head 81A of the bolt 81. On the other hand, the dimension of the long hole in the direction perpendicular to the specific direction is smaller than the width of the bolt 81 at the head 81A. The surface of the head 81A faces in the axial direction the surface of the rear frame 70 that is continuous with the edge defining the elongated hole.

In the second embodiment, as shown in FIG. 8, the specific direction of the elongated hole is approximately the front-back direction. Note that the bolt insertion hole 83 provided in the rear frame main body 70A is not limited to a long hole, and may have other hole shapes such as a circular hole or a polygonal hole. Further, the bolt insertion hole 84 of the front frame main body 60A may be a long hole, and the bolt insertion hole 83 of the rear frame main body 70A may have a hole shape other than the long hole. Further, each of the bolt insertion hole 84 of the front frame main body 60A and the bolt insertion hole 83 of the rear frame main body 70A may have a hole shape 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 A heating step (C-2) is performed. The second coating film forming step (C-2) in the second embodiment is the same as that in the first embodiment, so a description thereof will be omitted.

In the second embodiment, the second heating step (C- 2) is performed. That is, in the second heating step (C-2), the second component is heated while the upper end 62 of the front frame main body 60A and the upper end 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 62 of the front frame main body 60A and the upper end 72 of the rear frame main body 70A are allowed to be displaced relative to each other. Therefore, even if the material forming the reinforcing member main body 40A is different from the material forming 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, the joining process (D) shown in FIG. 62 and the upper end portion 72 are fixed to each other.

The fixing step is performed after the second heating step (C-2) in a state where 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 end portions 62 and 72 are fixed to each other using the bolt 81 and the nut 82. That is, the temporary fixing member 80 used in the temporary fixing process is also used as the fixing member 80 (joining member) in the fixing process.

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 are tightened with a second tightening torque larger than the first tightening torque in the temporary fixing step. are fixed to each other by the bolts 81. The first tightening torque is such that 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 in the second heating step (C-2). This is the tightening torque that allows for. The second tightening torque is a tightening torque that restricts the upper end portion 62 and the upper end portion 72 from being displaced relative to each other.

[Third embodiment]
FIG. 11 is a diagram showing steps 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 a first material), and the front frame main body 60A and the rear frame main body 70A are made of the steel (an example of a first material). (an example of the second material). That is, the reinforcing member main body 40A and the inner panel main body 20A are made of the same material.

In the third embodiment, the first component 101 includes an inner panel main body 20A, the reinforcing member main body 40A, and a plurality of reinforcements 121 to 124, while the second component 102 includes: It does not include the reinforcing member main body 40A.

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 assembly step (B-1) 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. A coating film 20B and a coating film 40B, which constitute a 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 component 101, the second component 102, and the third component are joined. Specifically, in the third embodiment, the lower end 61 of the front frame main body 60A and the lower end 71 of the rear frame main body 70A are relative to the front end 41 and the rear end 42 of the reinforcing member main body 40A. , for example, by a joining method such as a joining method using rivets or a joining method using bolts.

Further, in the third embodiment, the bonding 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 main body 60A and the lower end 71 of the rear frame main body 70A, and the front end 41 and rear end 42 of the reinforcing member main body 40A. intervene. As the adhesive 90, for example, an adhesive of a type that hardens at room temperature is used, as in the first embodiment. Note that in the bonding step (D) of the third embodiment, the step of interposing the adhesive 90 can be omitted, as in the first embodiment.

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

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

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

(A) Regarding the reinforcing member The method for manufacturing a vehicle side door and the vehicle side door 100 according to the embodiment include the waist reinforcing member 40. For example, as in the modification shown in FIG. 40 can be omitted. In the modification 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 the sash 50 but does not include the waist reinforcing member 40.

(B) Regarding the door panel body In the method for manufacturing a vehicle side door and the vehicle side door 100 according to the embodiment, the door panel body is constituted by the inner panel body 20A, but the door panel body is composed of the outer panel body It may be configured by

(C) About the temporary fixing step In the second embodiment, the upper end portions 62 and 72 are temporarily fixed with the bolt 81 and nut 82 in the temporary fixing step, but the present invention is not limited to this. . For example, in the temporary fixing step, the upper end portions 62 and 72 may be temporarily fixed by a holding member that sandwiches them.

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

(E) Regarding the fixing process In the second embodiment, the fixing method (joining method) for fixing the upper end portions 62 and 72 together in the fixing process included in the joining process (D) is performed using the bolt 81 and the nut. The fixing method is not limited to the one using 82, and for example, a fixing method using welding, a fixing method using rivets, etc. 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 and rear frame 70) are arranged in this order in the vehicle width direction at these joint parts, but the arrangement is not limited to this. The inner panel 20, the sash 50 (the front frame 60, the rear frame 70), and the waist reinforcing member 40 may be arranged in this order in the vehicle width direction at their joint portions.

(G) About joining the waist reinforcing member and the sash In the 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) are directly joined, but the embodiment is not limited to this.

For example, the waist reinforcing member 40 and the sash 50 (front frame 60, rear frame 70) may be joined (connected) via another member. Specifically, the lower end 61 of the front frame 60 of the sash 50 is joined to a hinge reinforcement that constitutes the other member, and the front end 41 of the waist reinforcing member 40 is joined to this hinge reinforcement. Examples can be mentioned. Further, the lower end portion 71 of the rear frame 70 of the sash 50 is joined to a lock reinforcement that constitutes the other member, and the rear end portion 42 of the waist reinforcing member 40 is joined to this lock reinforcement. can be mentioned. The other member may be made of the first material or 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 positions where they overlap 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 reinforcement constituting the other members are joined at overlapping positions in the vehicle width direction. , the rear end portion 42 of the waist reinforcing member 40, the lower end portion 71 of the rear frame 70 of the sash 50, and the lock reinforcement constituting the other members are joined at overlapping positions in the vehicle width direction. Examples 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 other members are arranged in the vehicle width direction is not particularly limited. The other member may be made of the first material or the second material.

20 Inner panel 20A Inner panel main body of the inner panel 20B Coating film of the inner panel 40 Waist reinforcing member 40A Reinforcing member main body of the waist reinforcing member 40B Coating film of the waist reinforcing member 50 Sash 60 Front frame 60A Front frame main body of the front frame 60B Front frame Coating film 70 Rear frame 70A Rear frame main body of rear frame 70B Coating film of rear frame 90 Adhesive 91 Adhesive layer 92 Joint portion 100 Vehicle side door 101 First part 102 Second part

Claims (7)

an inner panel body made of a first material having a first coefficient of linear expansion; and a second body which is attached to the inner panel body and has a second coefficient of linear expansion different from the first coefficient of linear expansion. A method for manufacturing a vehicle side door including a sash body made of a material,
a first heating step of heating a first component including the inner panel body;
a second heating step of heating a second component including the sash body;
a joining step of joining the first component and the second component after the first heating step and the second heating step;
including;
The sash body includes a front frame body that constitutes a front part of the sash body in the vehicle longitudinal direction, and a rear frame body that constitutes a rear part of the sash body in the vehicle longitudinal direction,
In the joining step, the lower end of the front frame body and the lower end of the rear frame body are positioned below the waist line of the vehicle side door. joining the first part and the second part;
The second component further includes a reinforcing member main body joined to one end of the front frame main body and one end of the rear frame main body,
The reinforcing member main body is made of the first material,
In the second heating step, the front side is heated such that the other end of the front frame main body and the other end of the rear frame main body are allowed to be relatively displaced from each other in the second heating step. A method for manufacturing a side door for a vehicle, the method being carried out in a state where the other end of the frame body and the other end of the rear frame body are temporarily fastened. an inner panel body made of a first material having a first coefficient of linear expansion; and a second body which is attached to the inner panel body and has a second coefficient of linear expansion different from the first coefficient of linear expansion. A method for manufacturing a vehicle side door including a sash body made of a material,
a first heating step of heating a first component including the inner panel body;
a second heating step of heating a second component including the sash body;
a joining step of joining the first component and the second component after the first heating step and the second heating step;
including;
The sash body includes a front frame body that constitutes a front part of the sash body in the vehicle longitudinal direction, and a rear frame body that constitutes a rear part of the sash body in the vehicle longitudinal direction,
In the joining step, the lower end of the front frame body and the lower end of the rear frame body are positioned below the waist line of the vehicle side door. joining the first part and the second part;
The first component further includes a reinforcing member main body joined to the inner panel main body,
The method for manufacturing a vehicle side door, wherein the reinforcing member main body is made of the first material. an inner panel body made of a first material having a first coefficient of linear expansion; and a second body which is attached to the inner panel body and has a second coefficient of linear expansion different from the first coefficient of linear expansion. A method for manufacturing a vehicle side door including a sash body made of a material,
a first heating step of heating a first component including the inner panel body;
a second heating step of heating a second component including the sash body;
a joining step of joining the first component and the second component after the first heating step and the second heating step;
including;
The sash body includes a front frame body that constitutes a front part of the sash body in the vehicle longitudinal direction, and a rear frame body that constitutes a rear part of the sash body in the vehicle longitudinal direction,
In the joining step, the lower end of the front frame body and the lower end of the rear frame body are positioned below the waist line of the vehicle side door. joining the first part and the second part;
The method for manufacturing a vehicle side door, wherein the second material has a larger elastic modulus than the first material. a first coating film forming step of forming a first coating film on the surface of the inner panel body;
further comprising a second coating film forming step of forming a second coating film on the surface of the sash body,
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 any one of claims 1 to 3 . the first material is an aluminum alloy,
the second material is steel;
The method for manufacturing a vehicle side door according to claim 3 . The second component further includes a reinforcing member main body joined to one end of the front frame main body and one end of the rear frame main body,
The reinforcing member main body is made of the second material,
The method for manufacturing a vehicle side door according to claim 3. The bonding step includes interposing an adhesive between the first component and the second component.
A method for manufacturing a vehicle side door according to any one of claims 1 to 6 .

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