Double-spindle polar coordinate drilling machine for ring machining

The utility model discloses a double-spindle polar coordinate drilling machine for processing ring pieces, which comprises a machine body, an adjustable double-spindle structure and an adjustable workbench structure, the adjustable double-spindle structure is arranged on a cross beam of the machine body, and the adjustable workbench structure is arranged on a base of the machine body. Wherein the adjustable double-spindle structure comprises two adjustable spindle units which are symmetrically arranged left and right, and each adjustable spindle unit comprises an X-axis driving motor, an X-axis lead screw, an X-axis sliding block, a Z-axis guide rail, a bearing seat I, a Z-axis spindle, a Z-axis motor, a Z-axis lead screw, a cutter spindle and a bearing seat II; the back of the Z-axis guide rail of the X-axis sliding block is connected with an X-axis guide rail on a cross beam of the lathe bed; an X-axis lead screw penetrates through the Z-axis guide rail of the X-axis sliding block; the back of the Z-axis sp