The invention discloses an aluminum
alloy high-
voltage cable aluminum
copper composite terminal. The aluminum
alloy high-
voltage cable aluminum
copper composite terminal comprises a
copper alloy substrate and connecting grooves formed in the two ends of the
copper alloy substrate; the connecting grooves adopt a U-shaped groove-shaped cross section and are symmetrically distributed along the axis of the
copper alloy substrate; the length of the connecting grooves is 1 / 5-1 / 2 of that of the
copper alloy substrate; the inner surfaces of the connecting grooves are both distribute with
aluminium alloy lining
layers; and the thickness of the
aluminium alloy lining
layers is 1 / 4-3 / 4 of that of the connecting groove side wall; and the preparation method comprises four steps of copper
alloy substrate prefabrication, connecting groove pre-
processing, aluminum lining layer positioning, connecting groove
diameter expansion and connecting groove fine
processing. By virtue of the aluminum alloy high-
voltage cable aluminum copper composite terminal and the preparation method thereof, the connecting structural strength, the
impact resistance performance, the
corrosion resistance performance and thehigh
temperature resistance performance between the terminal and the cable can be improved effectively, so that the mechanical structural strength of the terminal is highly improved; and in addition,the overload capacity of the terminal is improved effectively, and
current distribution uniformity is improved, thereby highly improving reliability and
operational stability of the
power cable connection operation.