Production technology of copper and aluminum composite transition connection terminal

Abstract

The invention relates to a production technology of a copper and aluminum composite transition connection terminal, and aims at providing the production technology of the copper and aluminum composite transition connection terminal which is simple in production technology and high in yield rate. The production technology comprises the following steps that step one: firstly solid copper is put in a melting furnace to be melted into liquid copper and then the liquid copper enters the crystallizer of a composite casting device in the vacuum state and is solidified into a copper pipe in the crystallizer; step two: solid aluminum is put into the melting furnace to be melted into liquid aluminum, then the liquid aluminum enters a constant temperature furnace to perform degassing and slagging and then enters the copper pipe in the crystallizer, and the liquid aluminum and the copper pipe are condensed into a whole to form copper and aluminum composite material, wherein one end of the copper and aluminum composite material is tubular and the other end is flat; and step three: the copper and aluminum composite material is pulled out of the crystallizer through a traction mechanism, and then the middle position of the flat end of the copper and aluminum composite material is drilled by a drilling machine so that the copper and aluminum composite transition connection terminal is formed.

Description

technical field [0001] The invention relates to a production process of conductive fittings, in particular to a production process of a copper-aluminum composite transition terminal. Background technique [0002] The copper-aluminum transition terminal is a conductive fitting used to connect the conductor at the end of the cable to the terminal of the electrical device. One end connected to the aluminum conductor of the cable is tubular, and the other end connected to the copper device is a flat plate of a specific shape. Copper equipment is connected to aluminum wires, and there will be two kinds of metal electrical transitions with different point differences, which will cause galvanic corrosion during operation. In order to avoid galvanic corrosion, the measures currently taken are copper-aluminum transition terminals connected to wires and equipment, which are used in the market The current copper-aluminum transition terminals are mainly friction welding, explosive weldi...

AI Technical Summary

Problems solved by technology

Friction welding has the disadvantage of excessive copper consumption, complicated production process, difficult quality control and easy scrapping, and friction welding products are easy to fall off under the impact of accumulated or short-term high current, which brings potential risks to use; the heat resistance of brazed joints Relatively poor, greatly affected by temperature, relatively low joint strength, relatively high requirements for surface cleaning and weldment assembly quality during brazing; explosive welding annealing is difficult, and the production yield is low

The source of materials is difficult, most of them work in the open air in the field, the mechanization intensity is low, the working conditions are poor, and it is also limited by the weather conditions. The price is relatively high and the scrap rate is high.