Pipe manufacture by sheet blank rolling

The paper considers manufacture of pipes for the aircraft hydro-gas systems by the method of sheet blank rolling. To implement this process, it proposes to use a special stamp, which stationary part is made in the form of a container filled with the elastic loose medium. Unlike other technologies for the sheet blank rolling, the proposed method is able to significantly reduce costs and increase technological flexibility in the pipes and profiles production when transferring from one product range to another, which is an extremely promising direction in the modern production conditions. To determine energy-power parameters of the sheet blank rolling process using the elastic loose medium, the pipe forming process was simulated in the Pam-Stamp 2G software package. Stresses and deformations in the workpiece – elastic loose medium system were determined. To verify the simulation results, an experimental stamp was manufactured, and a full-scale experiment was carried out on the pipes and open profiles rolling. Based on the experiment results, it was established that deformation force of a sheet blank for a stamp with a container filled with the elastic loose medium was 4 times less than the deformation force of a stamp with the monolithic elastic matrix, which appeared to be one of the main advantages of the proposed method.

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