JP6214035B2 - How to assemble an automobile body - Google Patents

Description

  The present invention relates to a method for assembling an automobile body.

  In the assembly process of an automobile body, a plurality of members constituting the vehicle body (including those in which a plurality of parts are pre-assembled in advance) are sequentially combined and joined by welding or the like, thereby integrating these members. Things have been done.

  Further, in recent years, for the purpose of improving vehicle performance, attempts have been made to integrate (integrate) what has conventionally been composed of two members. Specifically, as described in Patent Document 1, conventionally, a dash panel that has been formed separately from each other, and a pillar inner that constitutes an inner side of a front pillar disposed on both sides of the dash panel are made of steel plates. The one integrally formed by press molding has been proposed.

Japanese Patent Application No. 2013-37040

    However, if what is conventionally handled as two members is handled as one member, there is a concern about deterioration in welding workability in the assembly process. In the above example, when other members (for example, the front floor S / A) are joined to the dash panel by welding in the assembly process, a welding machine such as a welding gun is usually welded from the side of the assembly line. It will be inserted toward the point. However, if the pilaro inner is integrated with the dash panel in a form extending from the both ends of the dash panel to the rear of the vehicle body at the time of welding, the pilaro inner may interfere with the welding operation, and the welding method may be limited. is there. As a result, there arises a problem in that arc welding having a higher defect rate than spot welding has to be used for welding at the above-mentioned locations.

  In view of the above circumstances, the problem to be solved by the present invention is to achieve good welding workability even when a member having a three-dimensional shape is included in an assembly target, thereby improving the degree of freedom of welding. An object of the present invention is to provide a method for assembling an automobile body.

The solution to the above-described problem is achieved by the method for assembling an automobile body according to the present invention. That is, this method is an automobile body assembling method including a vehicle body assembling process for assembling a car body of an automobile by welding at least a part of a plurality of members, and welding is performed in the car body assembling process. after, by performing bending into a predetermined panel-like member out of the plurality of members flowing on predetermined lines, the final shape by bending the bending portion in the vehicle interior which is connected to the panel-shaped member main body of the panel-like member In the bending process, a pair of panel-shaped member main bodies and the bent portion of the panel-shaped members are connected to form a convex shape toward the vehicle interior side. It is characterized in that it is carried out by moving the pair of rollers along the connecting portion in a state of being sandwiched by the rollers and pushing the connecting portion flat .

  As described above, according to the assembling method of the present invention, the panel-shaped member can be brought into the final shape by bending the panel-shaped member after welding performed during the assembling process. Therefore, it is possible to weld the panel-like member before the bending process, in other words, the panel-like member in a state where the bent portion in the final shape (in the above example, the pyrrolo inner) is flattened. As a result, it is possible to improve the welding workability by avoiding as much as possible the situation in which the bent portion in the final shape hinders the access of the welding machine, particularly the spot welding machine. Therefore, since the welding machine can be easily introduced inside the welding location (inside the vehicle cabin), it is possible to improve the welding quality by changing the spot where only arc welding has been conventionally possible to spot welding. .

  The assembling method according to the present invention bends the panel member by moving the pair of rollers relative to the panel member while the panel member is sandwiched between the pair of rollers. May be.

  As described above, since the member to be bent has a weldable panel shape, the bending can be easily performed only by using a pair of rollers. Therefore, the equipment for bending the panel-like member can be reduced in size compared to the conventional (for example, a press), and the panel-like member arranged on the assembly line can be easily bent. Can be applied.

  As described above, according to the method for assembling an automobile body according to the present invention, even if a member having a three-dimensional shape is included in the assembly target, the welding workability is good, thereby improving the degree of freedom of welding. Can be achieved.

It is a flowchart which shows the flow of the vehicle body assembly method which concerns on one Embodiment of this invention. It is a perspective view which shows the form immediately after press molding of a dash panel. It is a principal part enlarged view of the dash panel shown in FIG. It is a perspective view which shows the form of the dash panel after performing welding in an assembly process. It is a top view of the bending apparatus for enforcing the bending method of a dash panel. It is a principal part enlarged view for demonstrating the one aspect | mode of the bending method using the processing apparatus shown in FIG. It is a principal part enlarged view for demonstrating the one aspect | mode of the bending method using the processing apparatus shown in FIG. It is a perspective view which shows the final shape of a dash panel.

  Hereinafter, an automobile body assembling method according to an embodiment of the present invention will be described with reference to the drawings. In the following description, a case where an automobile body including at least a dash panel and a pair of front pillars arranged on both sides of the dash panel is an assembly target and the dash panel is bent will be described as an example.

  FIG. 1 is a flowchart showing a flow of an automobile body assembling method according to an embodiment of the present invention. As shown in FIG. 1, this assembling method includes a press molding process in which a dash panel and a pillar inner that constitutes the inner side of the front pillar are integrally molded, and an intermediate molded product of the dash panel obtained in the press molding process. A vehicle body assembling step of assembling the vehicle body by coupling a plurality of members including each other. Among these, the vehicle body assembly process includes a welding process for welding the intermediate molded product of the dash panel, and a bending process for bending the intermediate molded product of the dash panel after the welding process. Hereinafter, each process will be described in chronological order.

  First, a dash panel intermediate molded product 10 shown in FIG. 2 is obtained by press-forming a steel plate as a raw material using a predetermined press machine (press-forming process). The intermediate molded product 10 integrally includes a dash panel main body 11 and pilaro inners 12 connected to both ends (both ends in the vehicle width direction) of the dash panel main body 11, and the final shape of the dash panel 1 (FIG. 8 to be described later). Is different from the dash panel main body 11 in the extending direction of the pilaro inner 12. Specifically, the dash panel 1 as the final molded product has a form in which the pilaro inner 12 extends from both ends of the dash panel main body 11 toward the rear of the vehicle body, whereas the intermediate molded product 10 of the dash panel is a dash panel. Pillar inner 12 extends from both ends of main body 11 outward in the vehicle width direction.

  Moreover, in this embodiment, as shown in FIG.2 and FIG.3, the dash panel main body 11 and the pilaro inner 12 in the intermediate molded product 10 are connected via the step part 13. As shown in FIG. In this case, the pilaro inner 12 is positioned behind the dash panel main body 11 by the amount corresponding to the step 13. Here, the cross-sectional shape of the stepped portion 13 is not limited to the substantially R-shaped cross section shown in FIG. 3, but is arbitrary in principle, but the stepped portion 13 is sandwiched and extended by a pair of rollers 41 (FIG. 5) to be described later. At this time, it is desirable to set the cross-sectional shape so that the pillaro inner 12 is bent and deformed in a predetermined direction with respect to the dash panel main body 11. In the present embodiment, it is desirable that the step portion 13 has a convex shape toward the vehicle interior side so that the pillar inner 12 extends from both ends of the dash panel body 11 toward the rear of the vehicle body. It is further desirable that the shape has a cross-sectional curved shape.

  In the present embodiment, a plurality of reinforcing beads 14 are provided on both sides of the dash panel main body 11 so as to extend along the horizontal direction. These beads 14 have a configuration in which the outer end of the passenger compartment extends to a position reaching the step portion 13 with the pillaro inner 12, thereby connecting not only the dash panel main body 11 but also the pilaro inner 12 (step portion 13). ) Can be effectively strengthened. For example, as described above, the bead 14 can be press-molded into a shape connected to the step portion 13 by forming the step portion 13 in a convex shape toward the vehicle interior side.

  After obtaining the intermediate molded product 10 of the dash panel in this way, the intermediate molded product 10 is conveyed to the vehicle body assembly process. The conveying means at this time is arbitrary, and, for example, a means for collectively conveying the intermediate molded products 10 of a plurality of dash panels on the conveying pallet can be employed.

  The vehicle body assembling step includes assembling a dash panel S / A (subassembly) by joining various peripheral parts (not shown) to the intermediate molded product 10 of the dash panel by a predetermined coupling means, and a dash panel S / A variety of peripheral parts (not shown) are coupled to A by a predetermined coupling means, and a process of assembling an ENCOPA S / A (engine compartment subassembly), and a front floor S / A20 to a predetermined coupling to the ENCOPA S / A A step of assembling the underfront S / A 30 (see FIG. 4) by coupling by means.

  In addition to these various types of welding such as spot welding and nut projection welding, various types of coupling means such as stud bolt fastening can be adopted as these coupling means, and they are appropriately selected according to the member or part to be coupled. obtain.

  Among these, spot welding is selected (welding process) at least for the connection between the encopper S / A and the front floor S / A20. Specifically, as shown in FIG. 4, a welding spot 15 is set at the center lower part of the intermediate molded product 10 of the dash panel constituting the Encopa S / A, and an assembly line 50 (FIG. 5) is directed toward the welding spot 15. A welding gun (not shown) is inserted from the side. At this time, since the pilaro inner 12 of the intermediate molded product 10 of the dash panel is extended from the dash panel main body 11 to the outside (and parallel) of the passenger compartment, the piaro inner 12 inserts the welding gun toward the welding spot 15. It will not be an obstacle. In addition, this spot welding may be performed twice or more with respect to the same location as needed (so-called additional shots may be performed).

  Thus, when welding of a predetermined location (especially spot welding) is completed, a predetermined bending process is performed with respect to the intermediate molded product 10 of a dash panel (bending process process). As shown in FIG. 5, the bending apparatus 40 used here is composed of a robot arm 42 having a pair of rollers 41 at the tip, and is disposed on the side of the assembly line 50. And the step part 13 located in the vehicle width direction both sides of the intermediate molded product 10 (underfront S / A30) of the dash panel which flows on the assembly line 50 is made accessible.

  Further, each of the pair of rollers 41 has a cylindrical outer peripheral surface, and the stepped portion 13 can be sandwiched between these cylindrical outer peripheral surfaces. In the present embodiment, when the pair of rollers 41 is introduced from one end (for example, the upper end) of the step portion 13, the separation distance (cylindrical outer circumference) of the pair of rollers 41 is such that the step portion 13 can be flatly extended. The facing interval of the surface) is set.

  Next, one mode of bending using the bending apparatus 40 will be described with reference to FIGS. In the present embodiment, the case where the bending process is performed twice on the intermediate molded product 10 of the dash panel will be described below as an example.

  First, the robot arm 42 is driven to bring the pair of rollers 41 provided at the tip thereof closer to the intermediate molded product 10 on the assembly line 50 so that the stepped portion 13 is sandwiched between the pair of rollers 41. A pair of rollers 41 is introduced from the upper end. Then, by moving the pair of rollers 41 in the longitudinal direction of the step portion 13 (vertical direction in FIG. 2) from one end of the step portion 13 to the other end (for example, from the upper end to the lower end), the step portion 13 is moved from its one end. It is sandwiched by a pair of rollers 41 in order and is stretched flatly (deformed from the broken line shape in FIG. 6 to the solid line shape). At this time, the extending direction of the stepped portion 13 is adjusted by the posture of the pair of rollers 41 that sandwich the stepped portion 13 (the angle of the rotating shaft).

  In the present embodiment, as shown in FIG. 6, the pair of rollers 41 is sandwiched between the step portions 13 with the rotation shafts of the pair of rollers 41 inclined at a predetermined angle (for example, 45 degrees) with respect to the dash panel body 11. The step 13 is pushed and extended in the same direction as the rotation shafts of the pair of rollers 41 by being moved. In addition, by bending the step portion 13 in this way, bending deformation occurs so that the pillar inner 12 is connected to the step portion 13 in the same plane. Specifically, the pilaro inner 12 is bent and deformed in the direction of rising toward the vehicle interior side. As a result, the intermediate molded product 10 after bending integrally has a stretched portion 16 formed by stretching the stepped portion 13 flatly at both ends of the dash panel body 11, and the vehicle width of the stretched portion 16 It is formed into a form integrally having the pillaro inner 12 on the outer side in the direction (first bending process).

  In the present embodiment, the stepped portion 13 (bending and extending portion 16) subjected to bending is further bent using the same pair of rollers 41 used in the previous bending (second). Bending process). Specifically, the pair of rollers 41 is introduced from one end of the stretched portion 16 so that the stretched portion 16 formed by the previous bending process (first bending process) is sandwiched between the pair of rollers 41. At this time, by making the postures of the pair of rollers 41 (the angle of the rotation shaft) different from those at the time of the previous bending, the pushing and extending portions 16 sequentially sandwiched between the pair of rollers 41 from the one end side are paired. Bending deformation occurs following the posture of the roller 41 (the angle of the rotating shaft). In the example of illustration, the extension part 16 is bent to the direction substantially orthogonal to the vehicle width direction of the dash panel main body 11 (deforms from the broken line shape of FIG. 7 to a solid line shape).

  Further, by bending the extending portion 16 as described above, the pilaro inner 12 connected to the same surface as the extending portion 16 is also in the same direction as the extending portion 16 (in FIG. 7, in the vehicle width direction of the dash panel body 11). Bending deformation occurs in a direction substantially perpendicular to the direction. Thereby, the intermediate molded product 10 after bending is formed into a form (final shape) in which the pilaro inner 12 extends from both ends of the dash panel body 11 toward the rear of the vehicle body. Further, an extension portion 16 formed by pressing and bending a step portion 13 provided in advance in the intermediate molded product 10 into a flat shape is formed at the connecting portion between the dash panel main body 11 and the pillaro inner 12. 16 extends in the same plane as the piraro inner 12. In this way, the dash panel 1 as the final molded product is completed (FIG. 8).

  After that, if necessary, the remaining members are joined to the dash panel 1 (under front S / A 30) so that other members such as the front floor S / A 20 can be joined to the dash panel 1. Assembling of the car body (front structure) is completed.

  As described above, according to the method for assembling an automobile body according to the present invention, the intermediate product 10 of the dash panel as the panel-like member is bent after the welding performed in the assembling process, so that the middle of the dash panel is obtained. The molded product 10 can be formed into a final shape. Therefore, welding can be performed on the intermediate molded product 10 of the dash panel in a state in which the pillaro inner 12 is flattened. As a result, it is possible to avoid as much as possible the situation in which the pillar shape inner 12 (FIG. 8) in the final shape hinders access to the welding spot 15 of the welding machine, particularly the spot welding machine, and to improve welding workability.

  In particular, in the present embodiment, as shown in FIGS. 5 to 7, focusing on a thin intermediate product 10 of a dash panel, a pair of intermediate parts 10 capable of holding a predetermined portion (step 13) can be sandwiched. Since the intermediate molded product 10 is bent using the roller 41, the bending can be easily performed without using a large facility such as a press machine. Therefore, the space for installing the side of the assembly line 50 can be relatively small. Further, if the installation space is small, each process that has been conventionally arranged in the assembly line 50 can be left as it is, and a new bending process and bending apparatus 40 can be installed, so that the assembly line 50 can be made compact. There is no worry to disturb.

  As mentioned above, although one Embodiment of this invention was described, this invention can also take a structure other than the above in the range which does not deviate from the meaning.

  For example, in the above-described embodiment, the case where bending is performed on the intermediate molded product 10 of the dash panel after completion of welding of the intermediate molded product 10 of the dash panel and the front floor S / A 20 is illustrated. Naturally, spot welding to a place where the pyrrolo inner 12 where the change of the distance does not hinder the welding work can be performed before or after the welding.

  Moreover, in the said embodiment, although the dash panel 1 was illustrated as a panel-shaped member which performs a bending process, it is good also considering the other panel-shaped member which comprises a motor vehicle body as the object of a bending process. In addition, since the gist of the present invention is to form a part hindering welding workability by bending after welding, is the panel-like member to be bent combined with other members by welding? It doesn't matter whether or not.

  Moreover, in the said embodiment, although the aspect which pinches and extends the step part 13 with a pair of roller 41 was illustrated as a bending process with respect to the intermediate molded product 10 of a dash panel, of course, the bending process which makes an aspect other than this is carried out. It may be adopted. As long as a desired bending process can be performed without providing the stepped portion 13, it is not always necessary to provide the stepped portion 13 in the intermediate molded product 10 of the dash panel. As for the vehicle body constituent members other than the dash panel 1, the step portion 13 is not essential as long as a desired bending process can be performed without providing the step portion 13. Further, as long as bending can be performed from the side of the assembly line 50 without worrying about installation space, the bending apparatus 40 is not limited to the illustrated form, and a tool having a tool other than the pair of rollers 41 is used. Bending may be performed.

DESCRIPTION OF SYMBOLS 1 Dash panel 10 Intermediate molded product of dash panel 11 Dash panel main body 12 Piraro inner 13 Step 14 Bead 15 Welding point 16 Extension part 20 Front floor S / A
30 Underfront S / A
40 Bending device 41 Pair of rollers 42 Robot arm 50 Assembly line

Claims (1)

An assembly method for an automobile body comprising a vehicle body assembly process for assembling an automobile body by welding at least a part of a plurality of members,
In the vehicle body assembly step, after performing the welding, by applying a bending process for a given panel-like member of the plurality of members flowing on predetermined lines, the panel-shaped member main body of the panel-like member Bend the bent part connected to the vehicle interior side to the final shape ,
The bending process includes a pair of rollers that connect the panel-shaped member main body and the bending portion and form connecting portions that are convex toward the vehicle interior side on the vehicle interior side and the vehicle interior outside, respectively. A method of assembling an automobile body, which is performed by moving the pair of rollers along the connecting portion in a sandwiched state and pushing the connecting portion flat .

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