Overseas technique to produce pre-bending machine has been mature which have high tonnage and efficiency,but its cost is also very high.

Analysis and experiment study on springback of straight flanging in rubber fluid forming;

This article briefly introduced the forming process and equipment for three main forming procedure(steel plate prebending,U-ing & O-ing)of LSAW pipe production line by UOE forming method,sumed up the process parameters of forming force for three forming procedure.

For a long time, the flat pattern development(FPD) of aircraft SMCs have been carried out by the manual computation primarily or according to experiences of workers, which keep more extra material for trimming after forming, so the efficiency is low.

Experimental study and analysis on shrink flanging in rubber fluid forming;