PURPOSE: To reduce considerably the sectional area of a pipe by pressure with a relatively small-sized installation by making small the contact area of ring roll calibers and the pipe to deform locally the pipe and making the pipe deformable with small force.
CONSTITUTION: ≥1 piece of ring rolls 3, 4, 5 are disposed in succession to a caliber C1 formed of rolling rolls 1, 1' in such a way that the centerline of the caliber pass of the rolling rolls is included in ring roll calibers D1WD3. Said ring roll 4 is supported in a gear 9, the revolving axis K of which is different from the central axis L of the calibers D1WD3. The gear 9 is driven by a driving gear connecting to a driving device so that eccentric rotating motion is given on the caliber D2. The pipe is locally deformed by such device and the sectional area thereof is largely decreased by pressure with the relatively small-sized installation.
KAWANAMI TAKAO
JP38005957A |