Pecan sawing machine

The invention discloses a hickory nut sawing machine which comprises a longitudinal center self-adaptive flexible clamping device, a self-tensioning walnut rotating device, a wall thickness adjusting base, a fretsaw cutting driven device and a fretsaw tensioning device. The invention belongs to the technical field of carya cathayensis sawing, and particularly relates to a carya cathayensis sawing machine. According to the longitudinal center self-adaptive flexible clamping device disclosed by the invention, gas for applying clamping force is compressed through a group of supercharging devices, so that a longitudinal self-aligning clamping air bag expands outwards and wraps a spherical hickory nut; spherical hickory nuts are effectively and firmly clamped through high-pressure air in the longitudinal self-aligning clamping air bag, and the technical effect that the spherical hickory nuts are finally stabilized in the center position in the vertical direction is achieved. The feeding amount of the spherical hic