Workpiece fixing and clamping device based on mechanical numerical control machining

The invention discloses a workpiece fixing and clamping device based on mechanical numerical control machining, which comprises a hard fixing plate, the side surface of the hard fixing plate is fixedly connected with a connecting rod, the side surface of the hard fixing plate is fixedly connected with a second telescopic rod, and the second telescopic rod is fixedly connected with the connecting rod. The end, away from the hard fixing plate, of the second telescopic rod is fixedly connected with a clamping piece, the inner surface of the clamping piece is provided with a groove and a supporting mechanism, the supporting mechanism comprises a supporting disc, a first telescopic rod and a pressure sensor, and the end, away from the hard fixing plate, of the connecting rod is fixedly connected with the supporting disc. A pressure sensor in the supporting disc is fixedly connected with the supporting disc, and the pressure sensor is electrically connected with a displayer and an adjusting mechanism. By means of t