Horizontal numerical control machining method of plane beam-type parts

The invention discloses a horizontal numerical control machining method of plane beam-type parts and a clamping clamp necessary for realizing the method. Under a one-time clamping condition, the method effectively realizes the rough machining and the fine machining of a beam part of a plane beam-type part under horizontal numerical control machining, ensures the coordination of machining size and avoids interrupting to machine and switch clamping under the horizontal closed-type numerical control machining.