Grinding and polishing device with automatic overturning structure and using method

The invention discloses a grinding and polishing device with an automatic overturning structure and a using method, and belongs to the technical field of grinding and polishing devices.Workpieces needing to be machined are placed on a conveying belt assembly to be conveyed to the position close to a mechanical arm workpiece adsorption assembly, and the mechanical arm workpiece adsorption assembly adsorbs and lifts the workpieces; the angle adjusting clamping plate assembly is started to drive the hinge clamping wheel assemblies to adaptively clamp the workpiece, and the angle adjusting clamping plate assembly is started to rotate the workpiece and adjust the angle to adapt to different clamped workpieces; the movable sliding block assemblies are started to enable the angle adjusting clamping plate assemblies to move along the arc-shaped sliding rail assembly, when one movable sliding block assembly is downward, the other movable sliding block assembly is upward to rotate a workpiece, and when the two movable