JPS60162584A - Welding method of other member to laminated plate - Google Patents

Abstract

PURPOSE:To execute easy welding without using large-sized or many kinds of short circuit members by subjecting the edge part of a laminated plate to enclosed welding by a small-sized structural member for short circuit then to enclosed welding to the neighborhood of the part for attaching the other part. CONSTITUTION:The edge part of a laminated plate 1 is held in place by a structural part for short circuit to establish an electrically short circuitable state. A welding electrode is pressed to the metallic plate near said part. Electricity is then conducted between both electrodes, by which the resin layer is softened and welded and enclosed welding Wa1 is executed. Enclosed welding Wa2 is then executed by utilizing the weld zone Wa1 as a short circuit and thereafter enclosed welding Wa1-Wan are successively executed by using the existing enclosed weld zones as a short circuit. Enclosed welding Wc1 is in succession executed to the position toward the welding position of the other member 2 with the weld zone Wa1 as a short-circuit and similarly Wc2 is executed. The other member 2 is welded to the plate 1 by executing further welding Wb1, Wb2 followed by Wb3, Wb4.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a method for welding other members to a laminate having a resin layer interposed between two metal plates.

(Conventional technology) A laminated plate with a resin layer interposed between two metal plates.

Since the vibration damping effect of converting and absorbing the total frictional heat of vibration is large, noise is suppressed. Therefore, it may be used as an automobile floor panel.

However, since the above-mentioned laminate has a structure in which a resin layer of non-conductive material is interposed between two metal plates of conductive material, it is difficult to weld the upper and lower metal plates together using general resistance welding equipment. However, since no current is applied between the pair of welding electrodes, the above-mentioned welding is impossible.

For that reason, conventionally, 1kt of laminates! +1 When welding two metal plates together or welding other parts onto a laminate, use a short-circuit component such as a shank-shaped vise, as disclosed in Japanese Utility Model Publication No. 52-55466. Then welding is done.

In this way, by using short circuit components,
It is now possible to apply electricity between a pair of welding electrodes, and the resin layer is softened and melted by the Joule heat generated during the initial energization, which biases the pair of welding electrodes in a direction that presses them against each other. Lock-in welding is achieved by bringing metal plates into contact.

However, when welding is performed using a short circuit component, the distance between the welding electrode and the short circuit component is set to 200111.
If the distance is longer than that, the energization condition will be poor, and the Joule heat generated at the beginning of energization will be reduced, effectively softening the resin layer.
It cannot be melted and proper lock-in welding cannot be performed. Therefore, if the weld is more than 200 mm away from the normal short circuit component, for example, a larger short circuit component may be used, with a radius of 200 HM from the weld
must be in contact with the metal plate in an area within

Therefore, even if the positions of the welds vary, short-circuit components, baffles, and fairly large size components that can contact the two metal plates within a radius of 200 mm from these welds are required. short-circuit components must be used.
The weight increases, making it difficult to handle, and the workability is poor.

On the other hand, it is conceivable to provide a plurality of short-circuit components whose sizes are differentiated in stages, and select and use a short-circuit component of a size that adapts to the fluctuations of the welded part from among these. In this case, a large number of short circuit components of different sizes are used. Therefore, if the bracket to which the spare tire is fixed needs to be fixed and welded to the upper surface of the central part of the panel, such as the trunk floor spring of a car, the trunk If the floor spring/L/wo is formed from a laminate, welding of the bracket to the laminate, the welding of the tamps and other parts is troublesome, and the work efficiency is completely reduced.

(Objective of the Invention) This invention was made to solve the above-mentioned conventional problems, and it can be easily and properly welded without using large or multi-column short circuit components, and has improved workability. It is an object of the present invention to provide a method of welding other members to a laminate plate in which this is realized.

(Structure of the Invention) In order to achieve the above object, the edges of the laminate are welded together using a small short circuit component, and then this welded part is used as a short circuit to reach the vicinity of the attachment part of other components. Welding is carried out at successively smaller pitches and the welded part is moved, and the welded parts near the attachment points of the other parts mentioned above are used as a final short circuit, and other parts are welded to the metal 4JR layer plate. There is.

(Example) Embodiments of the present invention will be described below with reference to the drawings.

In Figs. 1 and 2, 1 is the F rank floor panel of the automobile, 2 is a bracket that is another member (trunk floor spring), and 1 is the upper and lower metal plates IA, IB (
respective thickness Q, 4jlff) and both metal plates IA, I
Resin layer IC interposed between EO (thickness 50μ to 150μ)
The edges of both the metal plates IA and 1B are joined to each other by the laminates having the metal plates IA and 1B. The bracket to which the tab 9 and other members 2 are fixed are attached by dip welding Wb, -WO, and the locking bath contact portion Wa and other members 2
There is a closing weld W between and, 3. , W(!, has been.

Pitch P7 of the above-mentioned binding bath contact Wa, -Wan, Wa
,~WQ, pitch P! , WCI~WC! pitch P3
, Wc, ~Wb, .

pitch P4 of wb, and WOr, wb, ~Wo
The pitch P6 of , , Wb, are all 20011II
is set within

Next, the procedure for lock-in welding will be explained.

First, as shown in Fig. 3, the laminate (trunk floor panel)
1, so that both metal plates IA and IBk can be electrically shorted, and in the vicinity, the welding electrodes 4A and 4B of the resistance welding device are connected to the metal plates IA and IBk.
Push it to IB. As a result, both electrodes 4A, 48
The resin layer IC is softened and bath-melted by the Joule heat generated in the initial stage of energization, and the metal plates IA and IB' are brought into contact with each other. As shown in FIG. 4, welding Wa,
will be done.

Next, the above-mentioned lock-in welding portion Wa+k is used as a short circuit, and lock-in welding Wa, k shown in FIG.

Subsequently, using the lock-in welding portion Wa+e as a short circuit, lock-in welding Wc is performed at a position facing the welding position of the other member 2, and using this lock-in welding portion Wc+ as a short circuit, welding the welding position of the other member 2. Confined welding near the We! Then, the above-mentioned lock-in weld W (h
, t- step, followed by lock-in welding part WD+ ,
Use Wbi as a short circuit to perform lock-in welding.
By carrying out steps b, , and Wb42, the other member 2 is brought into contact with the laminate 1 as shown in FIG.

In this way, the short circuit component 3 is only used when welding is carried out by being confined to the edge of the laminate 1, and it can be small, so the troublesome welding work is eliminated. .

In addition, the existing welded joint can be used as a short circuit,
The next binding I4 is within 200 meters from this position.
Since the welding process is repeated in sequence, the shoe/I/heat generated at each welding part at the initial stage of energization is large, and the resin layer IC can be effectively softened and melted, making it possible to achieve proper welding. .

(Effects of the Invention) As explained above, according to the present invention, after the edges of the laminate are fully welded, the welded portion is used as a short circuit to sequentially weld the edges to the vicinity of the attachment parts of other members. After that, the welded part is used as a short circuit to weld other parts to the laminate, so it is easy to avoid over-correction without using large or multiple types of short circuit components. can be welded to improve workability.

[Brief explanation of drawings]

1 to 5 show an embodiment of the present invention, in which FIG. 1 is a perspective view showing an example in which other members are welded to an automobile trunk floor panel formed of a laminated plate, and FIG.
The figure is a tfi plane view taken along the line If-If in Figure 1, Figure 3 is a perspective view showing the first binding bath applied to the edge of the laminate, Figure 4 is a longitudinal side view of the same, and Figure 5 FIG. 2 is a cross-sectional view showing how other members are brought into contact with the laminate. 1... Laminated board, IA, IB... Metal plate, IC...
Resin layer, 2...Other members, wa, % Wan, w
b+ ~Wl), , Wel, Wc. ...171 junction. Patent Applicant Toyo Kogyo Co., Ltd. Agent 9th Floor Burial Officer Kunihide Kouhami (1 other person) Figure 1 Figure 2

Claims (1)

[Claims] (Laminated board with a resin layer interposed between 12 metal plates and 2 others)
This is a method of bath-welding parts, in which the edges of the laminate are closed and welded, the welded part is used as a short circuit, and other parts are successively closed and welded to the vicinity of the attachment part, and then the bath-welded parts are short-circuited. A method of welding other members to a laminate, which comprises using the other members as a circuit to weld the other members to the laminate.