Stretch forming-electromagnetism composite forming device and method for multi-curvature skin piece

Abstract

The invention discloses a stretch forming-electromagnetism composite forming device and method for a multi-curvature skin piece. The stretch forming-electromagnetism composite forming device comprisesa bottom plate, a mold and an electromagnetic coil used for forming a plate on the mold, the mold is mounted on the bottom plate, and the electromagnetic coil is arranged above the mold. The stretchforming-electromagnetism composite forming device is characterized in that the stretch forming-electromagnetism composite forming device further comprises a vertical oil cylinder, a tangential oil cylinder, and a chuck used for clamping the edge of the plate, one end of the tangential oil cylinder used for tangentially stretching the plate is hinged to the bottom plate, and the other end of the tangential oil cylinder used for tangentially stretching the plate is hinged to the chuck. A stretch forming and discharging composite process is adopted, stretch forming is conducted to solve a certainspringback problem, then remaining springback is eliminated through electromagnetic force, in this way, the thickness reduction of the plate can meet the design requirement, and meanwhile the requirement for electromagnetic forming energy can also be greatly lowered.

Description

technical field [0001] The invention relates to the technical field of plate forming, in particular to a stretch-electromagnetic composite forming device and method for multi-curvature skin parts. Background technique [0002] With the rapid development of high-tech industries such as aerospace, advanced aircraft, spacecraft, rockets, and missiles urgently need to adopt multi-curvature skin components with very significant structural benefits to reduce weight, improve the load-carrying capacity limit and range of the vehicle, etc. performance. In multi-curvature skin parts, different regions of the sheet often experience stress states in different directions. When the tensile stress is too high, the parts will be excessively thinned or even cracked, and when the compressive stress is too high, wrinkles will appear. And skin parts often have obvious springback problems. [0003] At present, high-strength and lightweight materials such as aluminum alloys and titanium alloys...

AI Technical Summary

Problems solved by technology

However, the repeated forming process needs to constantly adjust the process parameters and the position of the coil, resulting in low forming efficiency, and after each layer of sheet material is drawn, the distance between the sheet material and the mold is large, and the discharge must be precisely controlled parameters to achieve the precise fit of the sheet metal and the mold, which also increases the complexity of the forming process

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