Freezing support device and method for large thin-walled part

A freezing support device for a thin-walled part, comprising a freezing system and an auxiliary system;

• the freezing system comprises a heating source, a freezing sourced, water, flexible films and support plates;
• the heating source and the freezing source are installed on the support plates, the flexible films are connected to the support plates, and the water, the heating source and the freezing source are stored in a closed area formed between the flexible films and the support plates;
• the water is turned into ice by the freezing source, and the ice is melted by the heating source;
• the support plates are connected to piston rods;
• the interval between the support plates and a large thin-walled part is greater than the minimum thickness of the ice formed, the minimum thickness of the ice need to meet machining requirements, and a support force provided by the ice with the minimum thickness shall be equal to a cutting force;
• the auxiliary system mainly comprises a rotating device, a moving plate and guide rails, wherein the guide rails are connected to a servo system and comprise a Y guide rail and a Z guide rail, and the auxiliary system is used for realizing the movement of the support plates in X, Y and Z directions;
• the rotating device is formed by connecting two completely identical hydraulic prop devices, including an A hydraulic prop device and a B hydraulic prop device, together, to form A and B hydraulic prop devices, and the rotating device can rotate around the axes of the A and B hydraulic prop devices;
• the left end of each of the hydraulic prop devices is connected to each support plate, the right end thereof is connected to the moving plate, and the inner parts of the hydraulic prop devices are used for holding hydraulic fluid;
• pistons and the piston rods are arranged in sequence on the left end of the hydraulic fluid, and a controller is used to control the reciprocating motion of the piston rods by controlling the inlet and outlet of the hydraulic fluid in the hydraulic prop devices, so as to realize the movement of the support plates in Z direction, and thereby ensuring that the positions of the support plates relative to a tool nose spot are unchanged;
• the moving plate is a tabular structure with a right side connected to the Y guide rail, and provides support for the rotating device in X direction.