Frozen forming method for large tailored plate aluminum alloy component

A frozen forming method for an aluminum alloy component, comprising:

• cooling an aluminum alloy tailor-welded plate with a cryogenic fluid medium, and forming the aluminum alloy plate into a complex shape component by a tool, and the frozen forming method further comprising the steps of:
• step 1, placing the aluminum alloy tailor-welded plate onto the tool;
• step 2, assembling the tool and filling the tool with the cryogenic fluid medium so that the temperature of the tool drops to −150 degrees Celsius to −196 degrees Celsius;
• step 3, deforming the aluminum alloy tailor-welded plate by applying pressure with the tool when the temperature of a weld zone of the aluminum alloy tailor-welded plate reaches −150 degrees Celsius to −196 degrees Celsius and is lower than the temperature of a base metal zone, that is a temperature difference delta T occurs between the weld zone and the base metal zone, thereby forming the aluminum alloy tailor-welded plate to a designed shape of the aluminum alloy component;
• and
• step 4, disassembling the tool, and taking out the aluminum alloy component.