Large-hole-diameter combined boring cutter device

The utility model relates to a large-hole-diameter combined boring cutter device. The large-hole-diameter combined boring cutter device is composed of a rough boring module, a fine boring module and a cutter bridge. The fine boring module is composed of a right-angle fine-adjustment position-rotatable boring cutter head and a fine boring cutter clamp, the right-angle fine-adjustment position-rotatable boring cutter head is installed in the fine boring cutter clamp, the right-angle fine-adjustment position-rotatable boring cutter head and the fine boring cutter clamp are pressed through two laterally-fixing type screws to form an integral module, and the fine boring cutter clamp is installed in the cutter bridge and pressed through three screws. The rough boring module is composed of a rough boring cutter and a rough boring cutter clamp, the rough boring cutter is installed in the rough boring cutter clamp, the rough boring cutter and the rough boring cutter clamp are pressed through two laterally-fixing type screws to form an integral module, and the rough boring cutter clamp is installed in the cutter bridge and pressed through three screws. An inner hole is roughly bored through the rough boring module and finely bored through the fine boring module. The large-hole-diameter combined boring cutter device is widely used for roughly and finely boring through holes which are 370 mm to 1000 mm in size, blind holes which are 370 mm to 1000 mm in size and step holes which are 370 mm to 1000 mm in size. The large-hole-diameter combined boring cutter device is easy and convenient to install and operate, the cutters are rapidly replaced by replacing the rough boring module and the fine boring module, and the requirement for an operator is low. The labor intensity of the operator during online machining is low. The cutter cost is low.