Metallographic grinding and polishing device with multi-degree-of-freedom clamping device

The metallographic grinding and polishing device comprises a machine body, a grinding and polishing disc and a water outlet pipe, a linear moving assembly is arranged at the upper end of the machine body, a connecting plate is connected to the linear moving assembly, the clamping disc is movably connected to the bottom end of a screw rod, a main bevel gear is movably connected to the interior of the clamping disc, and the main bevel gear is movably connected to the bottom end of the screw rod. An auxiliary bevel gear is arranged at the end of the second lead screw, the adjusting nut is connected with a clamping plate through a connecting rod, and a telescopic rod is movably connected between the upper end of the clamping plate and the bottom end of the connecting plate. According to the metallographic grinding and polishing device with the multi-degree-of-freedom clamping device, a workpiece is stably clamped through the clamping plate, the screw rod is matched with the telescopic rods, the screw rod is rotat