JP2007168566A - Body structure and body joining method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a body joining method for surely joining a roof panel and a roof side rail without generating porosity by properly holding a gap in a joining part by simple device constitution and inexpensive equipment. <P>SOLUTION: This body joining method relates to the joining of the roof panel 1 and the roof side rail 4 constituted of a body side outer panel 2 and a body side inner panel 3 arranged along the vehicle body longitudinal direction at the vehicle widthwise outside of the roof panel 1. After mounting the roof panel 1 on a panel mounting part 5 formed at the body side outer panel 2 by bringing the roof panel 1 into point-contact with the panel mounting part 5, a roof panel joining part 1B is rotated and approached to a panel joining part 6 side formed at the body side outer panel 2 with the point contact part 1A as a center, and the gap between the roof panel joining part 1B and the panel joining part 6 is eliminated. Subsequently, the roof panel joining part 1B and the panel joining part 6 are joined. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a body structure and a body joining method, and more particularly, to a technique for joining by adjusting a gap between panels in a joint portion.

  For example, as a technique for joining the roof panel and the roof side rail, a galvanized metal plate is bent into a substantially L shape, butted against a prayer mold, and the roof side rail is pressed against the roof panel and pressed between them. There is a method of joining by laser welding (hereinafter, this method is referred to as a first joining method) (see, for example, Patent Document 1).

As another method, the body side outer panel and the body side inner panel are spot-joined as a worship joint, and then the roof panel is also spot-joined as a worship joint to the body side outer panel (hereinafter, this method is referred to as a second joint). (For example, refer to Patent Document 2).
JP 2002-144065 A Japanese Patent No. 3644290

  However, in the first joining method, a large jig for pressing the body side outer panel to the roof panel side is required, and the equipment becomes large and expensive. Furthermore, since the first joining method is a joint joint, an apparatus for holding the roof panel in the correct position is required. Further, in the first joining method, since the tensile residual stress is large, the mechanical properties of the joint are inferior and the processing accuracy of the panel terminal is also required.

  Further, in the first joining method, vaporized zinc is difficult to escape from the welded portion. Therefore, if a metal plate having a metal coating on the surface such as a galvanized steel plate is welded, the metal coated on the surface evaporates and Gas is mixed into the joint to form bubbles, which are called porosity. When the porosity is generated, the strength of the joint portion is lowered, and therefore, it is generally performed that an appropriate gap is formed between the metal plates and the gas is allowed to escape. However, since joining will be lost if there is too much clearance, maintaining the clearance in the right range is a major issue, and usually the clearance is preferably about 0.1 to 0.3 mm.

  On the other hand, in the second joining method, since spot welding is used, sheet separation (a gap between metal plates) is unavoidable. That is, in the case of spot welding, it is impossible to completely seal between the plate materials because they are joined at points, so it is necessary to fill the gap by applying a sealing agent in the subsequent process (painting process) is there. As a result, this second joining method requires a sealing agent coating device and a coating process thereof, and the number of man-hours increases.

  Further, in the second joining method, in order to perform spot welding, it is necessary to sandwich the flange, so that the cross-sectional shape is limited and the roof side rail cannot be made into a free shape.

  Therefore, the present invention provides a body structure and a body that can reliably join the roof panel and the roof side rail without generating porosity by appropriately holding the gap in the joining portion with a simple device configuration and inexpensive equipment. An object is to provide a joining method.

  The body structure of the present invention is a body structure formed by joining an end portion of a roof panel and a roof side rail. The body side outer panel is provided with a panel mounting portion on which the roof panel is placed in point contact. A panel joint is provided at a position above the vehicle and above the panel placement portion to be joined to the roof panel joint, and the roof panel joint is centered on a portion where the roof panel is in point contact with the panel placement portion. , And the gap between the joint portion of the roof panel and the panel joint portion is joined at a predetermined interval.

  The body joining method of the present invention is a body joining method for joining a roof panel and a roof side rail, and after placing the roof panel in point contact with the panel mounting portion formed on the body side outer panel, The joint portion of the roof panel is rotated close to the panel joint portion formed on the body side outer panel with the point contact portion as a center, and the gap between the roof panel joint portion and the panel joint portion is set to a predetermined interval. Then, it is characterized by joining between the junction part of these roof panels, and a panel junction part.

  According to the body structure of the present invention, the roof panel is brought into point contact with the panel mounting portion formed on the body side outer panel, and the joint portion of the roof panel is formed on the body side outer panel around the point contact portion. Since the joint between the roof panel joint and the panel joint is joined at a predetermined interval by rotating close to the side, even when joined using galvanized steel sheet, it can be joined without generating porosity, so that the joint strength High body structure can be provided.

  On the other hand, according to the body joining method of the present invention, since the roof panel is placed in point contact with the panel mounting portion formed on the body side outer panel, the panel mounting portion of the body side outer panel serves as a support for the roof panel, A dedicated device for holding the roof panel is not required.

  According to the body joining method of the present invention, the joint portion of the roof panel is moved to the panel joint portion side formed on the body side outer panel around the point contact portion where the roof panel is brought into point contact with the panel placement portion. Since the rotation is made close, the gap between the joint portion of the roof panel and the panel joint portion can be set to a predetermined interval, and the porosity can be easily controlled even when the galvanized steel plates are joined. Therefore, according to the body bonding method of the present invention, high strength bonding can be performed.

  Hereinafter, specific embodiments to which the present invention is applied will be described in detail with reference to the drawings.

"Description of body structure"
FIG. 1 is a perspective view showing the body structure of the present embodiment, and FIG. 2 is a cross-sectional view taken along the line AA in FIG.

  As shown in FIGS. 1 and 2, the body structure of the present embodiment includes a roof panel 1, a body side outer panel 2 and a body side that are disposed on the outer side in the vehicle width direction of the roof panel 1 along the longitudinal direction of the vehicle body. It has the roof side rail 4 which consists of the inner panel 3, and is comprised by joining the edge part and the roof side rail 4 of this roof panel 1. FIG.

  Both end portions in the vehicle width direction of the roof panel 1 are curved so as to form an arc shape toward the upper side of the vehicle body, and a portion forming the curved arc portion is formed on a panel mounting portion 5 of the body side outer panel 2 described later. The point contact portion 1A is a point contact portion. Further, the front end portion of the roof panel 1 in front of the point contact portion 1 </ b> A is a roof panel joint portion 1 </ b> B that is a joint portion of the roof panel 1.

  The roof side rail 4 is configured by abutting the flange portions 2A and 2B formed on the body side outer panel 2 with the flange portions 3A and 3B formed on the body side inner panel 3 and spot welding. On the body side outer panel 2, a panel placing portion 5 on which the point contact portion 1 A of the roof panel 1 is placed in point contact is mounted, and the roof mounting portion 1 B is joined to the roof placing portion 1 B at a position above the panel placing portion 5. A panel joint 6 is provided.

  The panel mounting portion 5 is a substantially horizontal flat surface and is formed over the entire vehicle longitudinal direction. On the other hand, the panel joint portion 6 is formed as a vertical wall that rises from one end of the panel placement portion 5 in the vehicle height direction substantially perpendicularly to the panel placement portion 5.

  The above-described roof panel 1 is rotated around the point contact portion 1A in the direction in which the roof panel joint portion 1B at the tip approaches the panel joint portion 6, and the roof panel joint portion 1B and the panel joint are joined. Joining is performed by forming a joint 7 by brazing or fillet laser welding in a state where the gap between the parts 6 is a predetermined interval.

  For example, when the roof panel 1, the body side outer panel 2 and the body side inner panel 3 are joined using a galvanized steel plate, the gap between the roof panel joint 1B and the panel joint 6 is adjusted so as not to generate porosity. Thus, a strong body structure can be obtained. In addition, when joining the steel plates which generation | occurrence | production of porosity does not generate | occur | produce, a body structure with high joint strength is obtained similarly by eliminating these gaps and performing fillet laser welding.

"Description of body joining method"
Next, a body joining method for obtaining the above-described body structure will be described.

  3 is a view showing a state in which the roof panel and the roof side rail are joined by the robot, FIG. 4 is an enlarged cross-sectional view of a main part showing the joined portion in an enlarged manner, and FIG. 5 is a view in which the roof panel is pressed by a pressure roller. It is a figure which shows the force relationship which acts on this roof panel.

  The roof panel 1 and the roof side rail 4 are joined using a joining device 10 attached to the arm tip 9 of the multi-indirect robot 8 as shown in FIG. The bonding apparatus 10 includes a torch 12 that irradiates a laser 11 toward a bonding portion, and the direction of the torch 12 can be changed according to the bonding portion. Further, the joining device 10 is provided with a pressurizing device 13 for biasing and pressurizing the roof panel 1 toward the body side outer panel 2 side.

  The pressure device 13 includes a pressure roller 14 that presses an arbitrary portion between the point contact portion 1A of the roof panel 1 and the roof panel joint portion 1B and biases and presses it to the body side outer panel 2 side. The pressure roller 14 is moved together with the joining portion irradiated with the laser.

  In order to join the roof panel 1 and the roof side rail 4 using the joining device 10, first, the roof side rail 4 is placed on the panel mounting portion 5 formed on the body side outer panel 2. At this time, as shown in FIG. 4, the point contact portion 1 </ b> A curved in the arc shape of the roof panel 1 is placed on the panel placement portion 5 in a substantially point contact state. Further, the roof panel joint portion 1B of the roof panel 1 placed on the panel placement portion 5 is at a position above the vehicle relative to the point contact portion 1A.

  Next, the pressure device 13 is operated to press and press the pressure roller 14 to an arbitrary position between the point contact portion 1A of the roof panel 1 and the roof panel joint portion 1B. Then, the pressure F applied by the pressure roller 14 acts on the roof panel 1 as shown in FIG. 5, so that the roof panel joint 1 </ b> B on the front end side approaches the panel joint 6 with the point contact portion 1 </ b> A as a fulcrum. Rotate in the direction (rotate in the direction indicated by arrow X in FIG. 4).

  As a result, even if there is a gap between the roof panel joint 1B and the panel joint 6, the roof panel joint 1B is a circle from the position indicated by the one-dot chain line in FIG. 4 with the point contact portion 1A as the center (fulcrum). It moves and adheres to the panel joint 6 without a gap. When galvanized steel sheets are used for the roof panel 1, the body side outer panel 2 and the body side inner panel 3, the pressure roller 14 is added so that a fine gap is left between them so as not to generate porosity. Adjust the pressure to adjust the gap.

  Then, the brazing material 15 is supplied to the bonded portion of the roof panel bonding portion 1 </ b> B and the panel bonding portion 6, and the laser 11 is irradiated to bond them. Such joining work is performed over the entire vehicle longitudinal direction of the roof panel 1. In this joining operation, the pressure roller 14 also presses the body side outer panel 2 of the roof panel 1 in synchronism with the movement of the laser 11, so that it is possible to join the entire range without a gap. It becomes.

  In the above example, brazing has been described as an example. However, similar effects can be obtained by joining the roof panel 1 and the roof side rail 4 by fillet laser welding.

  According to the present embodiment, the roof panel joint 1 </ b> B is made a predetermined gap with respect to the panel joint 6 by urging and pressing the roof panel 1 against the body side outer panel 2 by the pressure roller 14. Since it can be done (or can be brought into close contact with no gap), it is not necessary to preliminarily process the dimensional accuracy of the end shape of the roof panel 1 (the shape of the roof panel joint 1B). Therefore, since the roof panel 1 may be manufactured with a somewhat rough dimensional accuracy, the mold cost for manufacturing the roof panel 1 can be kept low.

  In addition, according to the present embodiment, since the point contact portion 1A of the roof panel 1 can be placed on the panel mounting portion 5 and the roof panel 1 can be supported by the roof side rail 4, the roof side as in the prior art. A large jig for pressing the rail 4 against the roof panel 1 in the vehicle width direction is not necessary, and the above-described gap correction at the joining portion can be performed by a general pressurizing device 13. As a result, the equipment cost can be greatly reduced. Moreover, according to this Embodiment, the apparatus for exclusive use which supports the roof panel 1 becomes unnecessary.

  Further, according to the present embodiment, the pressure roller 14 is urged and pressed from a direction slightly obliquely perpendicular to the vicinity of the roof panel joint 1B of the roof panel 1, so that the pressure roller 14 and the roof panel 1 are Therefore, the influence on the appearance quality of the roof panel 1 can be made small.

  Further, according to the present embodiment, when galvanized steel plates are used for the roof panel 1, the body side outer panel 2 and the body side inner panel 3, the gap between the roof panel joint 1 </ b> B and the panel joint 6 is set. Since the gap can be changed to an arbitrary gap by the pressure applied by the pressure roller 14, the porosity can be easily controlled.

  Further, according to the present embodiment, since the roof panel 1 and the roof side rail 4 are joined by brazing or laser welding, the sealing work performed after joining by spot welding can be eliminated, and the sealing agent and its application There is no need for work, and costs can be greatly reduced.

  In addition, according to the present embodiment, since the roof panel 1 and the roof side rail 4 are not joined by the worship joint, the degree of freedom of the cross-sectional shape of the roof body side can be increased, and the vehicle body rigidity can be improved by improving the degree of freedom of modeling.・ Strength can be improved.

  Although specific embodiments to which the present invention is applied have been described above, the above-described embodiments are examples of the present invention and are not limited to these embodiments.

  FIG. 6 is a cross-sectional view showing another example of the body structure of the present embodiment. The body structure of this example is different in that the shape of the point contact portion 1A and the roof panel joint portion 1B of the roof panel 1 is different from that of the previous example.

  Specifically, the end of the roof panel 1 in the vehicle width direction is bent inward, the bent tip is a point contact portion 1A, and the bent portion is a roof panel joint 1B. Similarly, in the roof panel 1 of this example, the roof panel 1 is urged and pressed to the body side outer panel 2 side by the pressure roller 14 so that the roof panel joint 1B is centered on the point contact portion 1A. Therefore, brazing or fillet laser welding can be performed with the gap between the roof panel joint 1B and the panel joint 6 as a predetermined gap (or without the gap). Since other effects are the same as those of the previous embodiment, the description thereof is omitted here.

It is a perspective view which shows the body structure of this Embodiment. It is sectional drawing in the AA line position of FIG. It is a figure which shows a mode that a roof panel and a roof side rail are joined with a robot. It is a principal part expanded sectional view which expands and shows a junction part. It is a figure which shows the force relationship which acts on this roof panel when a roof panel is pressed with a pressure roller. It is sectional drawing which shows the other example of the body structure of this Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Roof panel 1A ... Point contact part (site | part in which a roof panel makes point contact with a panel mounting part)
1B: Roof panel joint (roof panel joint)
DESCRIPTION OF SYMBOLS 2 ... Body side outer panel 3 ... Body side inner panel 4 ... Roof side rail 5 ... Panel mounting part 6 ... Panel junction part 8 ... Multi-indirect robot 10 ... Joining apparatus 11 ... Laser 12 ... Torch 13 ... Pressurizing apparatus 14 ... Addition Pressure roller 15 ... brazing material

Claims (5)

A roof panel, and a roof side rail including a body side outer panel and a body side inner panel disposed on the outer side in the vehicle width direction of the roof panel along the vehicle body longitudinal direction, and the end of the roof panel and the roof side In the body structure formed by joining the rail,
The body side outer panel is provided with a panel placement portion for placing the roof panel in point contact with the panel placement portion, and a panel joint portion that is positioned above the vehicle and is joined to the joint portion of the roof panel. Provided,
By rotating the joint portion of the roof panel around a portion where the roof panel is in point contact with the panel mounting portion, a gap between the roof panel joint portion and the panel joint portion is joined at a predetermined interval. Body structure characterized by being. In a body joining method for joining a roof panel and a roof side rail composed of a body side outer panel and a body side inner panel arranged along the vehicle longitudinal direction outside the roof panel in the vehicle width direction,
After the roof panel is placed in point contact with the panel mounting portion formed on the body side outer panel, the joint portion of the roof panel is formed around the point contact portion on the panel joint portion side formed on the body side outer panel. The body joining method is characterized in that, after rotating and approaching to make a gap between the joint portion of the roof panel and the panel joint portion a predetermined distance, the joint portion of the roof panel and the panel joint portion are joined. The body joining method according to claim 2,
A body joining method, wherein a portion between the point contact portion of the roof panel and a joint portion of the roof panel is pressed with a pressure roller. The body joining method according to claim 3,
The pressure roller is provided in a joining device that joins between the joint portion of the roof panel and the panel joint portion. A body joining method according to at least one of claims 2 to 4,
A body joining method characterized by joining by brazing or laser welding.

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