The hydraulic jack besides USES in the forging and stamping forming, may also use in rectifying, the press mounting, the pack, the briquetting and the clamp and so on.
液压千斤顶除用于锻压成形外，也可用于矫正、压装、打包、压块和压板等。
2
Compact cracks in guide pieces caused by ordinary hydraulicformingpress have been analyzed. Countermeasure to avoid cracks has been proposed for improving the qualification rate in mass production.
The structure and the working process of the die for closed forming on the common press were introduced. And the hydraulic system and the determination of the hydraulic parameters were stated.