Precision machining die for aluminum alloy optical lens cone

The utility model discloses an aluminum alloy optical lens cone precision machining die which comprises a base, a lower die plate, a top plate and a limiting piece, the lower die plate is fixed to the top of the base, a die core is placed in the lower die plate, limiting blocks are fixed to the periphery of the interior of the lower die plate through bolts, and clamping plates are arranged in the limiting blocks in a sliding mode. Connecting pieces are fixed to the periphery of the exterior of the lower die plate, second telescopic driving pieces are fixed to one ends of the connecting pieces, one ends of the second telescopic driving pieces are connected with clamping plates, and the clamping plates are clamped to the exterior of the die core. When the mold core is damaged, the second telescopic driving piece is started, the second telescopic driving piece enables the clamping plate to move, the clamping plate can be separated from the mold core, and therefore the mold core can be conveniently taken down to