JPH0359980A - Connecting method of linear welding parent metal - Google Patents

Abstract

PURPOSE:To secure a sufficient welding strength and to obtain a highly reliable welding connection generating no breaking of wire by positioning a linear welding parent metal crossing to a basic material to be welded, and after that, winding several rounds and weld-connecting only the finishing end side. CONSTITUTION:To a basic material 2 to be welded of a printed base 5, a linear welding parent metal 1 is positioned to cross, wound loosely to prevent a close contact to the tip of the basic material 2 to be welded, so as to provide a stress relief 6. After that, when the finishing end of the linear welding parent metal 1 is welded from the stress relief 6, a weld connection 3 is arranged positioning at the angle to escape to the scope not to contact to the external form of welding electrodes 7. Then, the welding electrodes 7 are welded in order, to finish the welding connection work. Consequently, not only the strength of the weld connection 3 is secured, but also no breaking of wire is generated, and a highly reliable welding connection work can be carried out.

Description

[Detailed Description of the Invention] [Field of Industrial Application] This invention is directed to the welding strength of the welded joint between the linear welding base material and the welding base material in the process of welding the linear welding base material to the welded base material. The present invention relates to a joining method that can ensure the following.

[Conventional technology]

Conventionally, two methods have been generally considered for welding a linear weld base material and a weld base material. The first method is to intersect the linear weld base material (11) with the to-be-welded base material (21), and join the crossed overlapping parts by micro spot welding, as shown in FIG. In the figure, +1) is the linear weld base material.

(2) is the base material to be welded, and C31 is a weld joint where the linear base material (1) is crossed and overlapped with the base material to be welded (2). +41 is a stress release, and C5) is a printed circuit board to which the base material 121 to be welded is attached. In the above example, the base material to be welded (
21, the linear welding base material (1) is crossed and overlapped (31t-1 welded base material 121)
1 Workability will be significantly deteriorated, and the stress relief required to ensure the strength of the welded joint (41t) must be provided on the M-type welding base material (1), making it lighter, thinner, shorter, and smaller. There are problems in that it is very difficult to ensure stress relief (4) in products that are used in the welding process, and that stress is applied directly to the welded joint, leading to wire breakage.

On the other hand, the second method is to wrap the linear welding base material fi+ several times in advance around the printed circuit board (51) to which the base material to be welded (21) is attached, as shown in FIG. This is an improved method that allows the work to be carried out continuously.In other words, in Figure 4, (1) is a linear welding base material, and (2) is a base material to be welded.

(3) is a linear weld base material (11
This is a welded joint where the two are placed so that they intersect and are wrapped several times. C41 is a stress release, and (5) is a printed circuit board to which the base material to be welded (2) is attached. In the above example, the linear welding base material (11) is preset to the base material to be welded (21).
The welding work can be performed continuously by wrapping the welding material around the material, and the workability can be improved compared to the first method.

In this way, the second method allows the same work to be done in one go, and can significantly improve work efficiency compared to the second method.

[Problem to be solved by the invention]

However, in this second method, as shown in Fig. 4 (3), it is necessary to provide the necessary stress relief +41'i to ensure the strength of the welded joint, and as with the first method, it is necessary to provide a stress relief of +41'i. It is very difficult to secure stress relief (41) in bLn products, and there are problems such as stress being applied directly to the welded joint, leading to wire breakage.

This invention was made to solve this problem, and by simply providing the minimum necessary stress relief for products that are becoming lighter, thinner, and smaller, stress is not directly applied to the welded joint, and the welded joint can be made smaller. The purpose of the present invention is to provide a welding method that can secure the strength of the welded joint, eliminate any disconnection of the welded joint, and perform extremely reliable welding work.

[Means to solve the problem]

In the welding and joining method according to the present invention, a linear weld base material is positioned so as to intersect with the base material to be welded, and then wound several times, and only the end portions are welded and joined.

[Effect]

(4) According to the present invention, a linear welding base material is wrapped around the base material to be welded, and only the end portion is welded. The purpose of the wrapped portion is to provide stress relief, so it should be wrapped loosely to avoid tight contact.

Therefore, for example, when mechanical stress is applied, the loosely wound part will absorb the force that tries to wrap around the base metal to be welded.2 It will absorb the mechanical stress and directly apply stress to the welded joint. can be prevented from happening.

〔Example〕

1st. FIG. 2 shows an example of the welding and joining method according to the present invention.

In the figure, (1) is the base material for linear welding, (2) is the base material to be welded, and (61 is the base material to be welded). The stress relief part (3) is a welded joint which is crossed at an angle such that the welding electrode (7) does not affect the stress relief part during welding.

+51 is a printed circuit board to which the base material to be welded (2) is attached.

1. Printed circuit board with base material to be welded (2) attached +51
(5) Position the linear welding base material (1) so as to intersect with the base material to be welded (2), and wrap it gently toward the tip of the base material to be welded (2) so as not to make it stick tightly. Relief part (6) is provided with gold. Thereafter, a welding joint (3) is provided which is located at an angle in which the terminal end of the linear welding base material fi+ escapes from the stress relief part (6) in a range 1 that does not cover the outer shape of the welding electrode (7) during welding. At this time, the base material to be welded (
It may be parallel to the tip of 2). The above process is performed for all base materials to be welded.

Next, the welded parts (7) are welded in order to complete the welding and joining work.

Therefore, in the bath welding performed as described above, the linear welding base material fi +
Since the stress relief part (6) of the weld joint (6) can absorb mechanical stress, it is possible to ensure sufficient joint strength compared to the conventional method, so this method completely eliminates disconnection from the weld joint (3). To make it @! It can be made very reliable.

Therefore, micro spot welding is an extremely effective means of electrical connection for products that are light, thin, short and compact. In addition, since the same work can be done all at once, work efficiency is extremely high.

〔Effect of the invention〕

As described above, according to the present invention, it is possible to ensure sufficient welding strength at the joint for welding work of linear welding base materials, and to realize a highly reliable welded joint without disconnection. 1. It is something that makes a contribution.

[Brief explanation of drawings]

FIG. 2 shows an embodiment of the present invention. FIG. 3 and FIG. 4 are diagrams for explaining a conventional welding joining method. (1) is the linear welding base material, C2) is the welded base material, C3) is the welding joint, (4) is the stress relief, (5) is the printed circuit board, C61 is the stress relief part, and C7) is the welding electrode. In addition, in FIG. 1, the same reference numerals indicate the same casings or corresponding parts.

Claims (1)

[Claims] In the method of joining a linear base metal to a base metal to be welded by micro spot welding, the linear base metal is wrapped around the base metal to be welded toward the tip of the base metal to create a stress relief part. After forming, the open end of the linear welding base material located in the opposite direction to the tip of the to-be-welded base material at the wrapping part of the linear welding base material is separated from the stress relief part at a predetermined angle. A method for joining linear welding base materials, characterized in that only the open end thereof is welded to the base metal to be welded.