我厂某产品高频元件,如图1所示,用纯铝L_4板料制成。零件的几何形状要求较高,内表面光洁度为▽7。按老工艺采用失腊铸造,零件出现缩孔较严重,有时废品率达到80～90％,不能满足生产需要。改用板料强力旋压—涨整形复合新工艺,经过反复试验,已投入批量生产,质量稳定,提高工效几十倍。现将新工艺简介如下: I plant a product of high-frequency components, shown in Figure 1, made of pure aluminum L_4 sheet. The geometry of the part is demanding and the inner surface finish is ▽ 7. According to the old craft using wax casting, parts shrinkage is more serious, and sometimes the rejection rate reached 80 ~ 90%, can not meet the production needs. Switch to the sheet strength spinning - up plastic composite new technology, after repeated tests, has been put into mass production, quality and improve work efficiency several times. Now the new process is as follows: