In the traditional power and power equipment industry, copper aluminum bimetallic washers are mainly realized through copper aluminum transition plate, copper aluminum transition clamp and copper aluminum wiring terminal. Copper aluminum transition plate, copper aluminum transition clamp and copper aluminum wiring terminal are generally connected by flash welding, friction welding and brazing. Generally, The joint surface is difficult to achieve complete metallurgical bonding, high scrap rate, low bonding strength, large copper consumption, easy to fracture, and will lead to high failure rate of equipment and power transmission and transformation lines.
The existing copper aluminum bimetallic washers electrical connection method is: the copper aluminum transition plate and copper aluminum transition wire clamp copper aluminum plate are obtained by explosive welding combined with rolling process. Because the interface of explosive welding belongs to inter atomic metallurgical bonding, its interface resistance is negligible, which can not only save energy consumption, but also prolong service life and save copper materials.
In power wiring, when copper or aluminum bolts are used to connect the copper and aluminum terminals, copper aluminum bimetallic washers are used as the adapter, and the gasket is clamped between the copper and aluminum terminals, so that the contact surface between the gasket and the copper and aluminum terminals is the same metal material; When the nut of the bolt is made of the same material as the terminal pressed and fitted, the copper and aluminum terminals shall be fixed directly with bolts; If the material of the nut of the bolt is inconsistent with that of the pressed terminal, add a gasket between the nut of the bolt and the pressed terminal, so that the contact surface of the gasket with the bolt nut and the terminal is the same metal material; The gasket is composed of a copper sheet and an aluminum sheet welded as a whole. Copper aluminum bimetallic washers can obtain superior connection performance and reduce the use of copper. The solution and manufacturing process are unique, simple and low cost. It can carry out large-scale production, ensure the universality of on-site installation and use, simple and convenient operation and low manufacturing cost.
