Composite forming method and device combining electric pulse creep aging with laser peening

A composite forming method combining electric pulse creep aging with laser peening, comprising the following steps:

• Step S1:
• modeling a ribbed integral panel component using a finite element software to produce a modeled model, and simulating a creep forming process of the modeled model using the finite element software to determine localized difficult-to-deform areas of the ribbed integral panel component, and then marking a ribbed integral panel based on the determined localized difficult-to-deform areas, wherein the localized difficult-to-deform areas are rib surfaces, skin surfaces, and curved transition regions between ribs and skins on the ribbed integral panel component;
• Step S2:
• performing surface grinding and polishing pretreatment on the marked ribbed integral panel, and fixing the ribbed integral panel component on a flexible tooling platform via a plurality of universal lifting devices and clamping ends, and then pre-bending the ribbed integral panel component into shape by using the plurality of universal lifting devices, wherein during a process of pre-bending the ribbed integral panel component into shape, a digital image correlation (DIC) detection system is employed to monitor a surface temperature, a stress value and a strain value of the ribbed integral panel component in real time, and heights and angles of each universal lifting device are adjusted separately by using computer control to compare a target surface of the component, to pre-bend the ribbed integral panel into shape;
• each universal lifting device comprises a lifting servo motor, a pitching servo motor and a universal suction cup, the lifting servo motor is mounted on the flexible tooling platform, an output end of the lifting servo motor is connected to a mounting seat, the pitching servo motor is connected to the universal suction cup through a pitching transmission mechanism, lifting and pitching actions of the universal lifting device are achieved by controlling the lifting servo motor and the pitching servo motor via a computer;
• Step S3:
• performing a laser shock strengthening treatment on the localized difficult-to-deform areas of the pre-bent ribbed integral panel through a laser peening mobile platform;
• Step S4:
• performing an electric pulse heating treatment on the ribbed integral panel after the laser shock strengthening treatment to achieve electric pulse creep age forming of the ribbed integral panel, and obtaining the ribbed integral panel component formed by the electric pulse creep aging, wherein a specific process of the electric pulse creep age forming comprises:
• electrically heating the ribbed integral panel after laser shock strengthening treatment through the clamping ends of the flexible tooling platform, adjusting a local curvature of the ribbed integral panel during the heating process by controlling the plurality of universal lifting devices in real time, so that an overall surface of the panel gradually approximates the target surface of the component, at the same time, monitoring a surface temperature, a stress value, a strain value, and an accuracy of a component surface in real time by employing a DIC detection system, and adjusting electric pulse working parameters and heights and angles of the universal lifting device in real time;
• Step S5:
• performing three-dimensional scanning on the ribbed integral panel component to obtain the component surface;
• determining whether an accuracy of the component surface meets a target accuracy by comparing the scanned component surface with the target surface of the component, when the accuracy of the component surface meets the target accuracy, completing the forming of the ribbed integral panel component and obtaining formed component;
• when the accuracy of the component surface does not meet the target accuracy, and further marking areas on the ribbed integral panel component that have not meet the target accuracy, and proceed to step S6;
• Step S6:
• performing a secondary laser shock strengthening treatment on the marked areas where the accuracy of the component surface does not meet the target accuracy by employing a laser peening device;
• and
• Step S7:
• repeating step S5 until the accuracy of the component surface of the ribbed integral panel component meets the target accuracy.