The invention relates to a turn-milling combined-type drilling and tapping center which comprises a milling
machine tool, a turning head and a turn-milling rotary table; the turning head is installed on the side face of a milling head of the milling
machine tool, and the turn-milling rotary table is installed on the surface of a
workbench of the milling
machine tool; the movement axes of the turn-milling combined-type drilling and tapping center are the X axis, the Y axis, the Z axis, the C axis and the W axis, and the W axis is in parallel with the Z axis; the X axis is the directional axis of perpendicular feeding movement of the turning head, the C axis rotates around the Z axis and is the rotary directional axis of the turn-milling rotary table; when the turning head moves, the turn-milling rotary table rotates at the preset rotary speed and the preset torque, the turning function is started, and the milling function is stopped; when the milling head moves, the turn-milling rotary table serves as a milling
workbench, the milling function is started, and the turning function is stopped; a part is machined through cooperation of turning and milling, through one-time clamping, the working procedures such as turning, milling, drilling and tapping can be completed,
machining of the overall complex part is completed, the
machining precision is high, the economic and practical effects are achieved, and the production efficiency of a product is greatly improved.