JPH0337266B2 - - Google Patents

Description

[Detailed description of the invention]

[Technical Field of the Invention] The present invention relates to a method of manufacturing a compression terminal made of aluminum with a copper plate soldered to a battledore. [Technical Background of the Invention] Generally, when connecting a copper wire and an aluminum wire using a compression terminal, a copper compression terminal is connected to the copper wire, and an aluminum wire with a copper plate soldered to a battledore is connected to the aluminum wire. Compression terminals are connected, and these compression terminals are connected and fixed with bolts and nuts. As the above-mentioned aluminum compression terminal, the one shown in FIG. 6, for example, is known. In the figure, reference numeral 1 indicates an aluminum stranded wire. The end of the aluminum stranded wire 1 is inserted into the wire insertion hole 3 of the wire compression section 2, and is compressed from the outer periphery of the wire compression section 2 by a compression device (not shown), thereby compressing the aluminum strand 1 and the wire compression. The section 2 is electrically connected. This wire compression section 2 is connected to one end of a flat battledore 4. This battledore 4 has four bolt insertion holes 5 bored therein, and a copper plate 6 is soldered to the back surface of the battledore 4 with solder 7. This copper plate 6 has a battledore 4
A bolt insertion hole 8 is drilled that coincides with the bolt insertion hole 5 drilled in . [Problems with the Background Art] However, in such a conventional compression terminal, the copper plate 6 is fixed to the battledore 4 by solder 7, so when the compression terminal is used exposed outdoors, the battledore 4 and There was a problem in that the joint surface with the copper plate 6 oxidized early and the electrical resistance of the compressed terminal increased. In addition, when the oxidation of the joint surface progresses further, the copper plate 6 fixed to the battledore 4 by soldering
The problem was that it peeled off. For this reason, an anti-corrosion layer is provided on the interface between the battledore plate 4 and the copper plate 6. Conventionally, the formation of this anti-corrosion layer has been carried out on-site by painting, wrapping with tape, or applying a sealant, and this method of formation has had the disadvantage that the finish of the compression terminal is poor. . [Object of the Invention] The present invention has been made in order to solve such conventional difficulties, and can effectively prevent oxidation of the joint surface between the battledore and the copper plate, thereby reducing the oxidation of the copper plate soldered to the battledore. It is an object of the present invention to provide a method for manufacturing a compression terminal that can produce a good quality compression terminal without reducing peel strength. [Summary of the Invention] That is, the method for manufacturing a compression terminal of the present invention includes joining a copper plate to one side of a battledore of an aluminum terminal,
The battledore of the compression terminal, which has a bolt insertion hole penetrating through the joint, is placed in a box-shaped formwork with a guide rod on the top surface of the bottom, so that the guide rod fits into the bolt insertion hole. Then, an anticorrosive agent is filled between the formwork and the outer circumferential surface of the battledore and between the bolt insertion hole and the outer circumferential surface of the guide rod, and after this anticorrosive agent has hardened, the The method is characterized in that the battledore is pulled out from the formwork. [Embodiment of the Invention] An embodiment of the present invention will be described below based on the drawings. FIG. 1 shows an embodiment of the compression terminal of the present invention, and in the figure, reference numeral 10 indicates an aluminum stranded wire. The end of the aluminum stranded wire 10 is inserted into the wire insertion hole 12 of the wire compression section 11, and the outer periphery of the wire compression section 11 is compressed by a compression device (not shown) to compress the aluminum stranded wire 10 and the wire. The portion 11 is electrically connected. The wire compression section 11 is connected to one end of a flat battledore 13. A bolt insertion hole 14 is bored in the battledore 13. A copper plate 15 is fixed to the back surface of the battledore 13 by soldering. On the copper plate 15,
A bolt insertion hole 16 that matches the bolt insertion hole 14 of the battledore 13 is bored. Also, Hagoita 13
and the outer peripheral surface of the copper plate 15 and the bolt insertion hole 14,
An anti-corrosion layer 17 is formed on the inner circumferential surface of the anti-corrosion layer 16 using an anti-corrosion agent 17a such as silicone. In addition, in such a compression terminal, the anticorrosion layer 17 is formed as shown in FIG. 2 and FIG. 3, for example. That is, first, the battledore 13 to which the copper plate 15 is soldered is placed on the top surface of the bottom with, for example, four guide rods 18a.
The guide rods 18a are inserted into the box-shaped formwork 18 in which the guide rods 18a are fitted into the bolt insertion holes 14, 16. Next, an anticorrosive agent 17a is filled between the outer peripheral surfaces of the battledore board 13 and the copper plate 15 and the formwork 18, and between the inner peripheral surfaces of the bolt insertion holes 14 and 16 and the guide rod 18a. After that, after the anticorrosive agent 17a has hardened, the battledore 1
3 is pulled out from the formwork 18. As a result, the outer peripheral surfaces of the battledore 13 and the copper plate 15 and the bolt insertion holes 1
An anti-corrosion layer 17 is formed on the inner circumferential surfaces of 4 and 16. Therefore, in the compression terminal configured as described above, since the anti-corrosion layer 17 is formed on the outer peripheral surfaces of the battledore plate 13 and the copper plate 15 and the inner peripheral surfaces of the bolt insertion holes 14 and 16, The joint portion is protected by the anti-corrosion layer 17 and is effectively prevented, and as a result, the peel strength of the copper plate 15 can be prevented from decreasing. Furthermore, in the method for manufacturing compression terminals of the present invention, the anticorrosion layer is formed in advance in the factory, so the finish is better and the appearance is more beautiful than compression terminals that are painted on site. Hereinafter, the method and results of testing the electrical resistance and peel strength of a copper plate performed on a compression terminal manufactured according to an embodiment of the present invention and a conventional compression terminal will be described. This test involved spraying a 5% NaC solution for 8 hours;
One cycle consisted of leaving it for 16 hours. In the electrical resistance test, as shown in FIG. 4, the two compression terminals of the embodiment are used, the battledore 13 is put together and fixed with bolts 19a and nuts 19b, and the electrical resistance between the symbols R shown in the figure is measured. It was carried out by Note that the compression terminal of the comparative example was also fixed in the same manner and the electrical resistance was measured. The peel strength of the copper plate is determined by fixing the battledore 13 of the compression terminal of the example to the back surface a of the cantilever A with bolts 19 and nuts 19b, inserting the iron rod B into the wire compression part 11, as shown in FIG. After compressing and fixing the outer periphery of the wire compression section 11 using a compression device (not shown),
A load P was applied to the end of the iron bar B in the direction of the arrow shown in the figure, and the load P was measured at the time when the copper plate 15 was peeled off (JIS C2804).
Note that the compression terminal of the comparative example was also fixed in the same manner and the load P was measured. The above test results are shown in the table.

[Table] From the above test results, in the comparative example, after 30 cycles, the electrical resistance increased by 7% compared to the 0 cycle, and the copper plate peel strength decreased by 70% compared to the 0 cycle. Further, in the example, the electrical resistance and the peel strength of the copper plate did not change even after 30 cycles. [Effects of the Invention] As described above, according to the method for manufacturing compression terminals of the present invention, since the anticorrosion layer is formed in advance in the factory, the finish is better than that of compression terminals that are painted on site. A compression terminal with a beautiful appearance can be provided.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a compression terminal manufactured according to the present invention, FIG. 2 is a perspective view showing the state of formation of the anticorrosion layer of the compression terminal, and FIG. 3 is a cross-sectional view taken along the line ˜ of FIG. Figure 4 is an explanatory diagram showing the arrangement of compression terminals in the electrical resistance test of compression terminals, Figure 5 is an explanatory diagram showing the arrangement of compression terminals in the copper plate peel strength test of compression terminals, and Figure 6 is an explanatory diagram showing the arrangement of compression terminals in the electrical resistance test of compression terminals. It is a perspective view showing a terminal. 10...Aluminum stranded wire, 11...Electric wire compression part, 1
2... Electric wire insertion hole, 13... Battledore, 14, 16
... Bolt insertion hole, 15 ... Copper plate, 17 ... Corrosion protection layer.

Claims (1)

[Claims] 1 A compression terminal battledore with a copper plate bonded to one side of the aluminum terminal battledore and a bolt insertion hole drilled through the joint at the joint, inside a box-shaped formwork with a guide rod planted on the top surface of the bottom. Then, insert the guide rod so that it fits into the bolt insertion hole, and then insert it between the formwork and the outer peripheral surface of the battledore and between the bolt insertion hole and the outer peripheral surface of the guide rod. A method for manufacturing a compression terminal, comprising filling the mold with an anti-corrosion agent and pulling out the battledore from the mold after the anti-corrosion agent has hardened.