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KR-102961701-B1 - Busbar manufacturing equipment for fuses

KR102961701B1KR 102961701 B1KR102961701 B1KR 102961701B1KR-102961701-B1

Abstract

The present invention relates to a busbar manufacturing device for a fuse implemented to form (or process) a short section in the central part when manufacturing a CCA (copper clad aluminum) type busbar, wherein an upper copper supply unit supplies two upper copper materials from an upward direction separated by a space where a short section is formed in the central part; a lower copper supply unit supplies two lower copper materials from a downward direction separated by a space where a short section is formed in the central part; an aluminum supply unit supplies aluminum materials from a direction between the upper copper materials and the lower copper materials; and a rolling unit receives the upper copper materials, aluminum materials, and lower copper materials and rolls the upper copper materials, aluminum materials, and lower copper materials so that a short section is formed in the central part.

Inventors

  • 김기영
  • 임영민

Assignees

  • 에이에프더블류 주식회사

Dates

Publication Date
20260507
Application Date
20240318

Claims (5)

  1. In a fuse busbar manufacturing device for manufacturing CCA type busbars, An upper copper supply unit that supplies two upper copper materials from an upward direction, separated by a space where a short circuit is formed in the central part; A lower copper supply unit that supplies two lower copper materials from a downward direction, separated by a space where a short circuit is formed in the central part; An aluminum supply unit that supplies aluminum material in a direction between the upper copper material and the lower copper material; and A rolling unit that receives the upper copper material, the aluminum material, and the lower copper material, and rolls the upper copper material, the aluminum material, and the lower copper material so as to form a short circuit portion in the central part; comprising, The above-mentioned rolling section is, A copper rolling module for receiving two upper copper materials supplied from the upper copper supply unit and two lower copper materials supplied from the lower copper supply unit, and simultaneously rolling the two upper copper materials and the two lower copper materials while maintaining a distance of a space in which a short section is formed in the central part of each. An aluminum rolling module for rolling an aluminum material received from the above aluminum supply unit; and, A busbar rolling module is provided that receives aluminum rolled in the aluminum rolling module between copper materials rolled in the copper rolling module and performs final rolling to integrate them. The copper rolling module (141) above is, A busbar manufacturing device for a fuse, comprising a central roll that serves as a reference axis for rolling the upper copper material and the lower copper material, wherein the central roll (1411) is provided with a first short-circuit forming unit protruding from the surface of the central portion, thereby forming a physical barrier in the space between the two supplied upper copper materials and between the two lower copper materials, thereby preventing the material from shifting toward the center during rolling and maintaining the shape of the short-circuit portion.
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  4. In paragraph 1, the above-mentioned rolling part is, A busbar manufacturing apparatus for a fuse, characterized by comprising: a busbar upper roll for simultaneously rolling two upper copper materials received from the upper copper supply unit, an aluminum material received from the aluminum supply unit, and two lower copper materials received from the lower copper supply unit, while maintaining a distance between the two upper copper materials received from the upper copper supply unit such that a short circuit is formed in the central part; and a busbar lower roll formed on the lower side of the busbar upper roll at a distance corresponding to the amount for rolling the upper copper materials, the aluminum material, and the lower copper materials, and maintaining a distance between the lower copper materials such that a short circuit is formed in the central part such that a short circuit is formed in the lower part, while rolling the upper copper materials, the aluminum material, and the lower copper materials together with the busbar upper roll.
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Description

Busbar manufacturing equipment for fuses The technical field of the present invention relates to a busbar manufacturing device for fuses, and in particular to a busbar manufacturing device for fuses implemented to form (or process) a central part as a short-circuit section when manufacturing a CCA (copper clad aluminum) type busbar. Busbars can take various shapes depending on the requirements, but generally they are flat and elongated in the longitudinal direction. As the surface area increases, the heat dissipation effect is superior, and by lowering the impedance of high-frequency currents flowing on the surface, large currents can be transmitted, and more electrical energy can be transferred through a conductor of the same volume. Accordingly, busbars constitute transmission circuits such as large-scale transmission and distribution lines with high current capacity, conductors for electrical equipment, and communication cables in power plants, large buildings, large factories, large department stores, subways, and new airports, and are also used as a substitute for cables in large-capacity distribution systems. These busbars are made and used almost exclusively of pure copper due to their high electrical conductivity (100% IACS) and melting point (1083℃). However, pure copper is not only expensive but also has a relatively high specific gravity (8.92 g/ cm³ ), making it difficult to store and install busbars and requiring a long installation time, which is a factor that increases the overall production and installation costs of the equipment. Accordingly, a busbar manufactured by coating the exterior of aluminum with copper was developed to reduce costs, decrease weight, and improve performance. The inner core of these busbars is aluminum, and the top, bottom, and both sides are coated with copper. Korean Registered Patent No. 10-2034011 (registered on October 14, 2019) discloses a method for manufacturing a busbar, comprising: a placement step of placing a second conductor, which is a rod-shaped copper, at each end of a first conductor, which is a rod-shaped aluminum; a friction welding step of friction welding between the first conductor and the second conductor; and a compression step of forming a busbar by compressing the first conductor and the second conductor friction-welded in the friction welding step. In the friction welding step, the first conductor and the second conductor are mounted on a friction welding machine, and the first conductor and the second conductor are rotated in mutually opposite directions at a rotational speed of 1,600 to 2,200 rpm by rotational force, and while the first conductor and the second conductor are in close contact and rotating in mutually opposite directions, a pressing force in the direction of the contact surface is applied in a range of 7 to 20 tons to join them. The compression step comprises a preheating process of preheating a press device to a preset temperature. The method comprises: a first compression process in which a first conductor and a second conductor, which are friction-welded, are fed into a preheated press device and then compressed to form a busbar; a tempering process in which the compressed busbar is tempered at a preset temperature; and a second compression process in which the tempered busbar is fed into a press device and compressed to form a second busbar, and further comprises, after the compression step, a coating step in which both ends of the busbar are punched to form holes for terminal connection and the surface of the busbar is coated using a coating agent. According to the disclosed technology, by manufacturing a busbar by friction welding copper to both ends of aluminum, costs can be reduced, weight can be decreased, and performance can be improved. In other words, as the busbar becomes significantly lighter, it can be used in various means of transportation, including automobiles, that require lightweight and rigidity. Furthermore, storage and transportation are easy, workability is improved, and the bonding between aluminum and copper is robust and possesses high strength, while busbars of desired sizes and shapes can be manufactured. Korean Registered Patent No. 10-2290087 (registered on August 10, 2021) discloses a copper-aluminum clad busbar and a method for manufacturing the same, which possesses excellent bonding characteristics and can significantly improve galvanic corrosion through a simple process in which an aluminum material formed by compressing aluminum powder into a through hole in the center of a column-shaped copper material is inserted and extruded, and then copper material fastening parts at both ends are joined by friction stir welding. According to the disclosed technology, a busbar for transmitting electrical energy comprises: a conductive part having a column-shaped aluminum material formed by compressing aluminum powder and a copper material surrounding the outer perimeter of the aluminum material; an