JPS63250082A - Manufacture of flexible connection terminal composed of laminated thin plate conductors - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention A. Purpose of the Invention [Industrial Field of Application] The present invention aims to reduce thermal stress, vibration, and Flexible connection terminals that are used to absorb positional errors, etc., and allow a certain degree of relative movement between them to make electrical connections.
In particular, the present invention relates to a method of manufacturing a flexible connecting terminal (or flexible connecting conductor) of a laminated (laminated) type thin plate conductor.

[Conventional technology]

A thin plate conductor mating type flexible connection terminal is basically a thin plate conductor made of copper, aluminum, nickel e-iron, etc., with a thickness of 0.05 to 1 mm, and length and width dimensions measured in aQ as required. A conductive flexible part consisting of a plurality of overlapping sheets (several sheets to several dozen sheets, or more) of flat plate-shaped or rectangular thin plate conductors bent as required, and conductive terminal portions on both ends thereof ( The attachment to the connected part consists of part). And it is generally manufactured by the following AiI people.

Method A (Fig. 6 (a) to (d)) 10 is the overall code of the flexible connection terminal, 1 is the flexible part, 2.
are the terminals at both ends. The electrically conductive 0-work flexible part 1 is made by stacking a plurality of rectangular thin plate conductors, and silver brazing, TIG welding, MIG welding, etc. are performed on both end surfaces of the stacked body 1a to connect the ends of each stacked thin plate conductor to each other. is fixed and integrated 3 (Figure (B)), and the treated portion is further sanded, etc. to obtain the required groove shape 4 (Figure (C)). The terminal parts 2 and 2 are made of a conductive terminal block made of a thick metal plate or the like and shaped into the desired shape, in addition to the flexible part 1 described in J2.
4. Thin plate conductor overlapping body 1 that straddles the conductive flexible part.
Thick metal plates 2a for terminals are butted against both ends of a and joined by inert cass arc welding etc. 5 (Figures (a) and (d))
The product is obtained by doing so.

6 is a hole formed in the terminal portion 2, through which a bolt or the like is inserted for tightening.

Other manufacturing methods such as the BD method described below are also known.

Method B (Fig. 7) Both ends of the individual stacked thin plate conductors are bonded by applying conductive backing plates 7 above and below to both ends of the stacked body 1a of a plurality of thin plate conductors and joining with rivets 8. , the two end portions are referred to as terminal portions 2, and the portion between the terminal portions is referred to as a flexible portion 1.

Method C (Fig. 8) Sheath metal fittings 7 are attached to both ends of the stacked body 1a of multiple thin plate conductors.
A is fitted and covered, and the sheath It part is pressed and compressed to bond both ends of the individual thin plate conductors, and the compressed sheath metal part 7a is used as the terminal part 2.2, and the connection between the terminal parts is made possible. Let it be the flexible part 1.

Method D (Fig. 9) Solder the end faces and both side surfaces of both ends of the stacked body 1a of four thin plates (by doing 1 digit 9, both ends of each stacked thin plate conductor are fixed and integrated, The half-FII attachment has terminal portions 2 and 2 at both ends, and an IIT flexible portion 1 between the terminal portions.

In the flexible connection terminals 10 shown in Figures 6 to 9, the stacked body 1a of thin plate conductors spanning the flexible portion is either shown in a polarized type, or in a free state as in the example in Figure 3, which will be described later. There are those that are bent in an arc shape or a mountain shape, or those that are a corrugated plate shape, and there are also those that are a so-called tuple bridge type or multiple bridge type as shown in the example in FIG.

[Problem that the invention seeks to solve]

However, both conventional manufacturing methods have the following problems. In other words, method A (Fig. 6) requires a large number of manufacturing steps, and does not require a sound bonding process that is mechanically and electrically reliable between the flexible portion 1 and the terminal portions 2 and 2. Obtaining B5.5 requires highly skilled welding skills.

Method B (Fig. 7) connects with rivets 8, so the backing plate 7,
That is, good flatness of the terminal portion 2 cannot be obtained, and in order to obtain the flatness, the backing plate 7 must be cut. In the end, this method also requires a considerable number of manufacturing steps.

In method C (FIG. 8), it is necessary to firmly press and compress the sheath fitting 7a.

In method D (FIG. 9), soldering process 9 depends on the level of skill, and inspection is almost impossible.

In addition, solder cracks tend to be easily eroded by the introduction of different metals or solvents, and the annealing effect weakens the conductor, resulting in electrical and mechanical defects.

Further, in each of the above methods A to D, the maximum temperature rise level is large due to the heat generated by energization of the flexible connecting terminal 10, which is a product obtained by these methods.

For products manufactured by method A, silver soldering is carried out to bond and integrate both ends of each laminated thin plate conductor of the laminated thin plate conductor body 1a, which is the conductive flexible part l. Welding process 3 (6th
Figure (b)) shows that a conductive bonding inclusion different from the base material is inserted between the individual thin plate conductor base materials; Welding process 5 for joining the terminal blocks 2a and 2a
(FIG. 6(d)) is also the same, t5. + The welding temperature of these products is as high as 600 to 800°C, which tends to cause thermal deterioration such as the formation of molten scale and annealing in the base material of thin plate conductor plies and conductive terminal plotters near the welding area. , etc. Therefore, the conductive flexible portion 1 and the conductive terminal portions 2 and 2
The welded part 3φ5 becomes part of an electrical barrier with a higher resistance value than the electrical resistance of the base material itself of the flexible part 1 and the terminal parts 2 and 2 (resistance of the product due to welding (i/j increase), Due to the heat generated when the current is applied, the maximum temperature of 7m-J2R value is inevitably high.

In addition, for products manufactured by the B-D method, the contact electrical resistance (electrical barrier) between the individual conductive thin plates stacked one above the other in the terminal parts 2, 2 is greatly involved, and the terminal parts 2, 2 and the individual conductive thin plates of the flexible part 1 in parallel and uniformly, there is actually considerable non-uniformity between the current values, and therefore, due to the heat generation due to electricity, It will be expensive.

In view of item 1, the present invention does not require a high degree of skill or experience,
Easy to use, low heat generation temperature level,
It is an object of the present invention to provide a method that can mass-produce this type of thin plate conductor overlapping type flexible connection terminal at low cost.

Summary: Structure of the Invention [Means for Solving the Problems] The present invention comprises a process of forming a plurality of laminated sheets of thin plate conductors, abutting conductive terminal blocks on both ends of the laminated body, The method includes a step of performing electromagnetic beam welding on the abutting portions to physically join the thin plate conductor overlapping body and the conductive terminal block.

A method for manufacturing a flexible connection terminal of a thin plate conductor interlocking type is described.

[For production]

Electromagnetic beam welding includes, for example, electron beam welding, laser beam welding, plasma welding, etc., and these are welding methods with good penetration properties and are known per se. The inventor of this welding method created a phenomenon in which the individual thin plates contained within the total thickness of a stack of multiple ferrous and non-ferrous metal thin plates were cut together by setting appropriate beam strength and other conditions. It has been found that it is possible to integrally join the materials without causing any problems.

Based on this knowledge, the present invention has developed a rational manufacturing method for the thin plate conductor overlapping type flexible connection terminal described in item 1.

The formation of the stacked body of thin plate conductors in the first step can be carried out as appropriate, by stacking a predetermined number of flat plate conductors of approximately the same shape to each other that have been cut in advance to a predetermined shape and dimensions, or a predetermined number of thin plate conductors that have been bent and formed in a predetermined manner. Alternatively, a long strip-shaped thin plate conductor may be wound in multiple layers around a core material of an appropriate diameter to form a coil-wound conductor, and the coil-wound conductor may be removed from the core material and crushed flat. It can also be formed by further bending it into a predetermined shape. The thin plate conductors stacked on top of each other can all have the same thickness and the same material, or flexibility can be achieved by mixing (combining) two or more types of thin plate conductors with different thicknesses and materials. etc. can be adjusted as appropriate.

Then, after cutting and shaping or other additional processing is performed as necessary on both end portions of the formed stack of thin plate conductors, the second
As a process, a conductive terminal block is butted against both ends of the thin plate conductor stack, and the abutted portions are electromagnetic beam welded to integrally join the thin plate conductor stack and the conductive terminal block.

By this welding process, (1) the ends of the individual stacked conductors in the welded part of the stacked thin plate conductor are bonded to each other, with respect to all the thin plate conductors that overlap each other vertically due to the through-joint property of the welding method; The base metals are melted together and bonded together into a bundle.

(Smell) At the same time, the base material of the conductive terminal block that was butted against the end and the base material of the thin plate conductor mated body melted into each other at the abutting portion, and the thin plate conductor mated body and the conductive terminal block It is integrated into one piece.

■ This welding process is done in a vacuum to prevent the formation of oxide scale. The welding method is gas welding, TIG welding, M
Much higher energy density than IG welding (maximum capacity density W/mm2 in case of electron beam welding is about 107,
On the other hand, gas welding is about 102, TIG or NiI
G welding has a temperature of about 103), which increases the welding speed and reduces the amount of heat input per 1'11 area, and the H humidity temperature near the weld during welding is 220°C.
The condition m1 is kept to a low level, and thermal deterioration, thermal deformation, etc. of the base material are kept to a minimum.

That is, basically, the first step of forming a plurality of laminated sheets of thin conductors, and the abutting portions of the ends of the laminated body and the terminal protrusion abutted against the ends, respectively. This is a simple method with a small number of man-hours, consisting of only two steps, the second step of performing the electromagnetic beam welding process described below.

The welding process itself does not require highly skilled skills such as in inert gas welding, and from the above 11 to 1), the flexible part of the thin plate conductor ply and the terminal part of the electrically conductive The electrical resistance of the welded joint with the terminal block itself is maintained at approximately the same resistance value as the electrical resistance of the flexible part and the base material of the terminal part itself, and the increase in the electrical resistance value of the product due to welding is greater than that of conventional products. As a result, as shown in the examples below, the maximum temperature level can be lowered based on the heat generated by electricity, and the product has good electrical and mechanical properties with little variation between products. This makes it possible to easily produce pre-produced products.

[Example] Example 1 (Figures 1 and 2) In Figure 1, lOO is an electron beam output head of an electron beam welding machine. Electron beam welding involves irradiating the workpiece with a high-speed electron beam in a vacuum and using the resulting shock wave energy to perform the welding. The welding machine itself includes an electromagnetic device for adjustment, and is well known, so its details will be omitted.

When an electron beam L is irradiated and scanned along the line of contact between the end of the thin plate conductor stack 1a, which is the object to be processed, and the conductive terminal block 2a abutted against it, both sides la
・As explained in ①, ②, and (g) of the above-mentioned operation section, 2a are electrically and mechanically well joined together by the through-joint property of the welding method. 11 indicates the through joint.

Figure 2 shows flat rectangular thin plate conductors of the same shape cut to predetermined shapes and dimensions (in this example, the length is 300 mm and the width is 120 mm).
A predetermined number of thin copper plates (0.2 mm thick) (100 in this example)
conductive terminal blocks (copper) 2a and 2a are butted against both end sides of the stacked body 1a, respectively, and the butted parts are subjected to electron beam welding (in this example, the accelerating voltage of the electron gun is 200KV, current 100mA, scanning speed 2
00 mm/min, degree of vacuum: 2×IQ4 Tarr) FIG. The bright holes 6 and 6 of the terminal parts 2 and 2 are connected to the terminal block 2
It may be formed in advance in a.2a, or it may be formed in the welding process 11.
It may also be formed in post-processing after. It is also possible not to specifically provide the perforated portions 6,6.

The electron beam welding may be laser beam welding, plasma welding, or other electromagnetic beam welding that has penetration bonding properties.

:fr, 3 (Δ(a) and (b) are shown in Figure 2).In the case of the one shown in Fig. 2, individual thin plates (9 bodies) are press-formed in advance into an arc shape or a chevron shape, or thin plates are formed by post-processing. These are a perspective view and a sectional view of one end of a product constructed by molding the entire conductive bonded body 1a into such a shape and using L-shaped conductive terminal blocks 2a.

4(a) and 4(b) are the ones shown in FIG. 3, in which the ends of the individual laminated thin plate conductors are compressed by fitting sheath metal fittings 12 (made of copper) to both ends of the thin plate conductor overlapping body 1a. They are a perspective view and a cross-sectional view of one end side of a product which is integrated, and then a conductive terminal block 2a is butted against the end thereof and subjected to electron beam welding.

FIG. 5 shows a perspective view of a so-called double-bringed product.

Example of energization test The product shown in FIG. 4 above manufactured according to the present invention (this is referred to as product 1), and the product manufactured according to method A explained in FIG. 6 above (
A conventional product of the same type (this will be referred to as Product 2) made using silver soldering welding), and a conventional product of approximately the same type (this will be referred to as Product 3) manufactured according to method C (sheath metal fitting 7a - made of copper) as explained in FIG. 8 above.
400 each for 3 products 1 a 2 fist 3
A current of 0 A was applied, and the rise in temperature to the maximum temperature was measured due to the heat generated by the current. The results are shown in the table below.

That is, it can be seen that the maximum temperature rise value of Product 1 manufactured according to the present invention, based on the heat generated by electricity, is significantly lower than that of Products 2 and 3 manufactured by the conventional method. This is because in the case of product 1, the increase in electrical resistance of the product due to welding 11 is small.

C. Effects of the Invention As described above, the present invention does not require a high degree of skill or experience, can be easily carried out with a small number of man-hours, and has excellent electrical and mechanical performance. This type of thin plate conductor overlapping type flexible connection terminal can be mass-produced at low cost, and the intended purpose is well achieved.

[Brief explanation of drawings]

Figure 1 is a schematic diagram of electron beam welding, Figure 2 is a slope view of one product, Figures 3 (a) and (b) are smooth views and cross-sectional views of one end of other types of products, and Figure 4 is a cross-sectional view of one end side. Figures (a) and (b) are a slope view and cross-sectional view of one end side of a product of another form, Figure 5 is a slope view of a double bridge type product, and Figures 6 (a), (b), and ( C
) and (d) to FIG. 9 are explanatory diagrams of various conventional manufacturing procedures, respectively. 2 is a flexible part, 2-2 is a terminal part, and 11 is an electromagnetic beam joint part.

Claims (2)

[Claims] (1) A step of forming a stacked body (1a) of a plurality of thin plate conductors, a conductive terminal block (1a) at both ends of the stacked body (1a)
2a) and (2a), and electromagnetic beam welding is performed on the butted portion to integrally join the thin plate conductor stack (1a) and the conductive terminal blocks (2a) and (2a); A method for manufacturing a thin plate conductor interlocking type flexible connection terminal, including: (2) Electromagnetic beam welding is electron beam welding, laser beam welding, or plasma welding, Claim 1
A method for manufacturing a thin plate conductor overlapping type flexible connection terminal as described in 2.