JP2015047613A - Flexure processing method for panel member, and automobile body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a flexure processing method for panel member which has preferable handle ability of the panel member and capable of simplifying equipment for integral molding even the three-dimensional panel member is subjected to integral molding, and to provide an automobile body.SOLUTION: The panel member is sandwiched by a pair of rollers, and the pair of rollers move relatively to the panel member, and one side of a portion sandwiched by the pair of rollers is bent to the other side.

Description

  The present invention relates to a panel member bending method and an automobile body.

  For example, 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 sub-assembled in advance) are sequentially combined and joined by welding or the like, thereby integrating these members. To be 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, a dash panel as a panel-like member that has been conventionally formed separately and an inner side of a front pillar disposed on both sides of the dash panel are configured. A product in which a pillaro inner is integrally formed by press forming of a steel sheet has been proposed.

Japanese Patent Application No. 2013-37040

  However, when the dash panel and the pilaro inner are integrated as described above, the pillaro inner is integrally formed in a state extending from both ends of the dash panel toward the rear of the vehicle body. ) Has a three-dimensional shape after integration, even if it has a panel shape. This is not only difficult to handle compared to the case of a flat panel shape, but also when a dash panel integrated with a pilaroa inner is stacked for transportation, when the pilaroa inner and the dash panel are stacked separately in a separate structure. Compared with this, there is a problem in that it becomes bulky and the conveyance efficiency to the next process (such as an assembly process) is reduced.

  For example, the shape of each of the pillaro inner and the dash panel is made into a final shape, and the pillaro inner is formed into a form that extends integrally and parallel to the dash panel by a press process, and after this intermediate molded product is conveyed to the assembly process, the pillaro inner If the bending process is performed, it is expected that the handling property including the conveyance will be improved. However, this type of panel-like member is usually formed into a final shape by various processes using a press. For this reason, if it is attempted to bend the pillar inner during the assembly process, it will be necessary to install a bending press in the assembly process. It is difficult to incorporate. In addition, even if it is incorporated, the assembly line becomes complicated and the peripheral equipment increases, which results in reversing the flow of downsizing the line.

  The above-mentioned problems are not limited to the integrated product of the dash panel and the pillar inner, and can occur in the same way when a panel-like member having a three-dimensional final shape after integration is integrally formed.

  In view of the above circumstances, the problem to be solved by the present invention is that the panel-shaped member has good handleability and is necessary for integral molding even when the panel-shaped member having a three-dimensional shape is integrally molded. An object of the present invention is to provide a panel-shaped member bending method and an automobile body that can simplify equipment.

  The solution to the above problem is achieved by the panel member bending method according to the present invention. That is, this processing method is a bending method for a panel-shaped member, and the pair of rollers are moved relative to the panel-shaped member in a state where the panel-shaped member is sandwiched between the pair of rollers. It is characterized by bending one side of the sandwiched portion with respect to the other side.

  As described above, according to the bending method according to the present invention, the panel-like member can be bent by only the operation of holding the pair of rollers and moving the relative movement with respect to the panel-like member. Therefore, the panel-like member can be formed into a final shape without using a bending press. For example, in the case of forming a dash panel in which a pillaro inner is integrated, the effect will be described as an example.First, the pillaro inner is formed in a press process until the pillaro inner extends integrally with the dash panel main body, By supplying the intermediate molded product to the assembly process and applying the bending process to the connecting portion between the pillar inner and the dash panel in the assembly process, the panel-like member can be formed into a final shape in the assembly process. Thereby, at the time of transfer to an assembly process, since it does not become bulky when a panel-like member is stacked, transferability improves compared with the conventional integrated structure product. Further, since the panel-like member is sandwiched and bent by the pair of rollers, it is not necessary to prepare a dedicated die that matches the shape of the panel-like member at the time of bending. Therefore, the degree of freedom in bending (corresponding to a plurality of types and the number of moldings can be changed) is increased. In addition, if the bending apparatus is provided with a pair of rollers, the size of the equipment can be reduced as compared to a bending press, so that the apparatus can be easily incorporated on the side of the line, for example. It is possible to avoid an increase in installation space for the peripheral equipment of the line.

  In the bending method according to the present invention, a stepped portion is provided in advance in the panel-like member, and the pair of rollers are relatively moved along the longitudinal direction of the stepped portion in a state where the stepped portion is sandwiched between the pair of rollers. Further, by pushing and extending the stepped portion in a flat shape, one side sandwiching the stepped portion may be bent with respect to the other side. In addition, a step part here can provide the difference in height between one side and the other side which pinched | interposed the said step part, and can connect the said one side and the other side (for example, figure) Of course, the shape shown in FIG. 3 includes a shape in which the one side and the other side can be connected in a state where the step portion itself has a change in height, such as a groove shape.

  In this way, a stepped portion is provided in advance on the panel-like member to be bent, and this stepped portion is sandwiched between a pair of rollers and stretched so that one side sandwiching the stepped portion is the other side. Can be bent more reliably.

  Further, the bending method according to the present invention uses a roller having a cylindrical outer peripheral surface as a sandwiching surface as a pair of rollers, so that the stepped portion is stretched flat, thereby sandwiching the stretched portion and the stepped portion. However, the other side may be formed in the same plane.

  In this way, by bending as described above using a pair of rollers having a cylindrical outer peripheral surface as a sandwiching surface, it is formed in the same plane as the stretched portion (push-out portion). Can be bent to a predetermined angle with respect to the other side (for example the dash panel body). In addition, the bending angle at this time is determined by the angle of the clamping surface (cylindrical outer peripheral surface) when the step portion is clamped by a pair of rollers. By performing the above bending process, it is possible to bend to an arbitrary angle without difficulty. In addition, if a plurality of bending processes using the same shape roller are performed, a series of bending processes can be performed with a common bending apparatus, so that only one bending apparatus is required. It is possible to further reduce the installation space.

  Moreover, the solution of the above-mentioned problem is also achieved by the automobile body according to the present invention. In other words, this vehicle body structure is a vehicle body having a dash panel and a pair of front pillars disposed on both sides of the dash panel. The dash panel is directed from the dash panel body and both ends of the dash panel body toward the rear of the vehicle body. The pillar pillar inner that forms the inner side of the front pillar is integrally formed by press molding, and the connecting part between the dash panel main body and the pillar inner is flat. It is characterized by the fact that the stretched portion formed by stretching is formed in the same plane as the pillaroiner.

  As described above, according to the method for processing a panel member and the automobile body according to the present invention, the handleability of the panel member is good even when the panel member having a three-dimensional shape is integrally formed. And it becomes possible to simplify the equipment required for integral molding.

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.

  Thus, according to the bending method according to the present invention, the step portion 13 provided in advance in the intermediate molded product 10 of the dash panel is sandwiched by the pair of rollers 41, and this is along the longitudinal direction of the step portion 13. Then, the intermediate molded product 10 of the dash panel can be bent by only the relative movement. In this way, the pillarro inner 12 is molded in a press molding process to a form that extends integrally and in parallel with the dash panel body 11 via the stepped portion 13, and the intermediate molded product 10 of this configuration is supplied to the assembly process. By performing the bending process in the process, the intermediate molded product 10 of the dash panel can be formed into a final shape within the assembly process. Therefore, at the time of transfer from the press molding process to the assembly process, the intermediate molded product 10 of the dash panel is not bulky when stacked on the pallet for conveyance, and the transportability is improved as compared with the conventional integrated structure product. . In addition, since the step portion 13 provided in the intermediate molded product 10 of the dash panel is sandwiched and bent by the pair of rollers 41, a dedicated die that matches the shape of the dash panel 1 is not prepared at the time of bending. I'll do it. As a result, the degree of freedom in bending increases. Further, by constructing the bending apparatus 40 with a robot arm 42 having a pair of rollers 41 provided at the tips, the size of the equipment can be reduced as compared with a bending press. Therefore, even if the bending apparatus 40 is incorporated on the side of the assembly line 50, the space for installing on the side of the assembly line 50 can be reduced.

  Further, in the present embodiment, as shown in FIGS. 5 to 7, using a pair of rollers 41 having a cylindrical outer peripheral surface as a sandwiching surface, the pillaro inner 12 is oriented substantially perpendicular to the dash panel body 11. Bent up to. By using the roller having such a shape, the bending process of the pillaro inner 12 can be performed twice or three times or more. Therefore, it is possible to bend without difficulty even from a state in which the pilaro inner 12 extends parallel to the dash panel main body 11. Further, if a plurality of bending processes using the same-shaped roller are performed, a series of bending processes can be performed with the common bending apparatus 40, so that only one bending apparatus 40 is used. The installation space can be further reduced.

  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 step portion 13 is flattened and extended in the first bending process, and then the extended portion 16 is bent in the second bending process. The step portion 13 may be extended to a certain extent, and may be extended to a completely flat shape by the second bending process. In short, the step portion 13 may be pushed and extended flatly by a plurality of bending processes.

  In the above-described embodiment, the pair of rollers 41 is exemplified by a configuration in which the interval between the rollers 41 is fixed to a predetermined size (for example, the plate thickness of the panel-like member). May be adopted. As a specific example thereof, there is a method in which a pair of rollers 41 provided at the tips of different robot arms 42 is used to separately access a part to be bent.

  Moreover, in the said embodiment, when using what has a cylindrical outer peripheral surface as a pair of roller 41, the step part 13 previously provided in the intermediate molded product 10 of the dash panel is clamped, and is extended flatly. However, the present invention is not necessarily limited to this form (combination). As long as one side sandwiching a portion sandwiched by the pair of rollers 41 can be bent with respect to the other side, a combination of the intermediate molded product 10 (panel-like member) of another form and the pair of rollers 41 is employed. It is also possible. For example, as a pair of rollers 41, convex portions and concave portions having shapes corresponding to each other are provided on the outer periphery, and the connecting portion between the dash panel main body 11 and the pilaro inner 12 is sandwiched and relatively moved, thereby allowing relative movement. Accordingly, the pillaro inner 12 may be bent with respect to the dash panel main body 11 by deforming the part that is sequentially sandwiched along the shape of the convex part and the concave part. In this case, if the outer peripheral shape and the clamping mode of the pair of rollers 41 are appropriately set, the portion such as the stepped portion 13 does not necessarily have to be provided in the connecting portion in advance.

  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. As an assumed application example, with a part of a box member such as a rocker being opened, a welding gun is inserted inside and spot welding with another member is performed. A method of forming a final shape of a box member by bending the part with respect to the remaining part by bending the part according to the present invention can be considered. Of course, in light of the fact that the gist of the present invention is to improve handling after molding and simplify equipment necessary for integral molding, the panel-like member to be bent need not necessarily be a vehicle body component. In addition, the present invention can be applied to a panel-like member for arbitrary use.

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 (3)

A method of bending a panel-shaped member,
By moving the pair of rollers relative to the panel-like member in a state where the panel-like member is sandwiched between the pair of rollers, one side sandwiching the portion sandwiched between the pair of rollers is changed to the other side. A method of bending a panel-shaped member that is bent with respect to the panel.   A stepped portion is provided in advance in the panel-like member, and the pair of rollers are relatively moved along the longitudinal direction of the stepped portion with the stepped portion sandwiched between the pair of rollers, so that the stepped portion is flat. The bending method according to claim 1, wherein the one side sandwiching the stepped portion is bent with respect to the other side by being pushed and extended. In an automobile body provided with a dash panel and a pair of front pillars disposed on both sides of the dash panel,
The dash panel is integrally formed by press molding a dash panel body, and a pillar inner that extends from both ends of the dash panel body toward the rear of the vehicle body and forms the inner side of the front pillar.
The connecting portion between the dash panel main body and the pillaro inner is formed with a stretched portion formed by extending a step portion provided in advance in the connecting portion in a flat shape so as to be flush with the pillaro inner. A car body characterized by that.

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