JPH0518770U - Welding structure of damping steel plate - Google Patents

Abstract

(57) [Summary] [Purpose] Prevents opening of the connection end during welding,
An object of the present invention is to provide a welded structure of a vibration damping steel plate capable of improving workability and welding performance. [Structure] The connection end portion 13 of the vibration damping steel plate 10 is wound and sandwiched by the connection end portion 14 of the vibration damping steel plate 10 connected to the vibration damping steel plate 10. Welded structure of damping steel plates characterized by being welded.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a welded structure of a vibration damping steel plate used for soundproofing an automobile or the like.

[0002]

[Prior Art]

 As one of the means to prevent the generation of noise due to panel vibration in automobiles, etc., use a vibration-damping steel plate with a vibration-damping material interposed between the panels, such as a thin steel plate with a resin material sandwiched in between There is a method to increase the damping capacity of and reduce the vibration.

As a welding structure for such damping steel plates, conventionally, as shown in FIG. 5, a connection end of a damping steel plate 1 (a thin steel plate 2 with a resin material 3 interposed in the middle) is connected. Each part 4 is bent at a right angle to form an L-shape, and the connecting ends 4 and 4 are brought into face-to-face contact with each other. Also, the connecting end parts 5 and 5 of both damping steel plates 1 and 1 are welded. As shown in FIG. 6, one connecting end portion 4A is made to project longer than the other connecting end portion 4B connected thereto, and both connecting end portions 4A, 4A, There is a structure (lap welding) in which 4B is overlapped and connected by welding 7 to one of the long connecting ends 4A at the connecting end 4B of the other short connecting end 4B.

[0004]

[Problems to be solved by the device]

 However, the conventional welding structure as shown in FIG. 5 can be easily welded in the case of the ordinary steel plate, but since the vibration-damping steel plate 1 has the resin material 3 sandwiched in the middle, the heat of welding As a result, when the resin material 3 at the connection end portions 4 and 4 is melted, a force is generated in the outermost thin steel plates 2A and 2A at the connection end portions 4 and 4 in a direction in which they separate from each other due to thermal expansion. To do. As a result, there is a drawback that the outermost thin steel plates 2A, 2A are warped from the end faces 5, 5 of the connection end portions, resulting in open mouth and poor welding. Further, in the case of the conventional welded structure as shown in FIG. 6, due to the same reason as above, the longer outermost thin steel plate 2A is warped from the end face 5A of the connecting portion, and the same mouth as described above is produced. There is a drawback that a gap is generated and a welding failure occurs.

[0005]

[Means for solving problems]

 The present invention has been made in order to solve the above-mentioned conventional problems, and an object thereof is to provide a welded structure in which opening of the opening at the time of welding is prevented, and the gist thereof is the control. When the connection end of the vibration-damping steel plate is wrapped around and sandwiched by the connection end of the vibration-damping steel plate to be connected to the vibration-damping steel plate, the connection part of both the vibration-damping steel plates is welded. It is in a welded structure.

[0006]

【Example】

 Hereinafter, the present invention will be described in detail with reference to the embodiments shown in FIGS. 1 is a sectional view of a welding structure according to the present invention, FIG. 2 is an explanatory view showing a processing step of the welding structure, and FIGS. 3 and 4 are sectional views of another embodiment of the present invention.

In FIGS. 1 to 3, reference numeral 10 denotes a vibration damping steel plate, which has a structure in which a resin material 12 is sandwiched between two front and back thin steel plates 11 and 11 and the vibration damping steel plates 10 are connected to each other. When the ends 13 and 14 are bent outward at a right angle, the connecting ends 13 and 14 are in contact with each other.

Reference numeral 13 A denotes an end face of the upper connecting end 13, which extends to a midpoint of the lower connecting end 14 as shown in FIG. The projecting portion is folded back upward at the end surface 13A of the connecting end portion 13 as shown in FIG. 2B, and the connecting end portion 13 is held inside as shown in FIG. When it is formed in such a state, both connecting end portions 13 and 14 are caulked and connected to each other.

Reference numeral 15 is a weld metal, which is welded at the end face 14 A of the connecting end portion 14 in the embodiment shown in FIG. 1, and in the embodiment shown in FIG. The mating portion 16 of 14 is welded with the weld metal 15.

Therefore, in the embodiment shown in FIG. 1, the weld metal 15 can be mounted on the connection end portion 14 because the welding is performed at the end surface 14 A of the connection end portion 14, and the entire end surface 14 A is covered with the weld metal 15. As a result, welding can be performed without opening the mouth. Further, in the embodiment shown in FIG. 3, the welding is performed at the joining portion 16 of the connecting end portions 13 and 14 on the back side of the damping steel plate 10 apart from the end surface 14A of the connecting end portion 14, and therefore, it can be performed at the time of welding. There is no conduction of heat to the vicinity of the end face 14A of the connecting end portion 14, and welding can be performed without opening the mouth, as in the case of the above-described embodiment.

FIG. 4 shows another embodiment of the present invention in which the connecting end portions 13 and 14 of both damping steel plates 10 to be connected are folded back in opposite directions and bent in a U shape. The U-shaped connecting ends 13, 14 are engaged with each other. Then, when the connecting end portions 13 and 14 are caulked from the outside of both damping steel plates 10 to connect, the joint portion 16A between the bent portion of the connecting end portion 14 and the other damping steel plate 10 is welded to the weld metal. It was welded at 15.

Since the end faces 13A and 14A of the connection end portions 13 and 14 are connected to each other while being held by the connection end portions 13 and 14, they are affected by heat during welding. It can be welded without cracking and opening.

[0013]

[Effect of the device]

 As described above, the welded structure of the vibration damping steel plate according to the present invention is such that when the connection end portion of the vibration damping steel plate is wound and sandwiched by the connection end portion of the vibration damping steel plate connected to this, both Since the connection part of the vibration damping steel plate is welded, the end surface of the connection part does not open due to heating during welding. Therefore, there are various effects that the welding work is easy and the workability is improved, and the welding can be surely performed.

[Brief description of drawings]

FIG. 1 is a sectional view of a welding structure according to the invention.

FIG. 2 is an explanatory view showing a processing step of the welding.

FIG. 3 is a sectional view of another embodiment.

FIG. 4 is a sectional view of still another embodiment.

FIG. 5 is a sectional view of a conventional welding structure.

FIG. 6 is a cross-sectional view of still another conventional example.

[Explanation of symbols]

 10 Damping Steel Plate 11 Thin Steel Plate 12 Resin Material 13 Connection End 13A Same End Face 14 Connection End 14A Same End Face 15 Weld Metal 16 Fitting Part 16A Fitting Part

Claims (1)

[Scope of utility model registration request] 1. A connection end portion of a vibration damping steel plate is wound by a connection end portion of a vibration damping steel plate connected to the vibration damping steel plate and is sandwiched between them, and the connection portions of the both vibration damping steel plates are welded together. Welding structure of damping steel plate.