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旋压是一种特殊的加工方法,既具有使板料成形的作用,也具有使拉深的筒形件改变原来形状的作用。旋压可分普通旋压、强力旋压。旋压工艺有成形、收颈、胀形等方式。旋压加工常出现以下弊端:成形和收颈时工件容易失稳和起皱;胀形时工件容易撕裂;工件表面易留下旋压的螺旋纹沟槽和材料变薄。在日用搪瓷工业中旋压常用于痰盂的收颈,面盆翻口以及菜锅、糖缸、茶壶的胀形,
Spinning is a special kind of processing method, which not only has the function of forming the sheet metal, but also has the function of changing the original shape of the drawn cylinder. Spinning can be divided into ordinary spinning, strong spinning. Spinning process has a shape, neck, bulging and other means. Spinning often appear the following drawbacks: forming and neck when the workpiece is prone to instability and wrinkling; when the workpiece is easy to tear bulge; workpiece surface spin spiral grooves and material left thin. Spinning in the daily enamel industry commonly used in the spittoon neck, basin Fan mouth and pot, sugar cylinder, teapot bulging,