PURPOSE: To correctly execute thickness deviation correction work, to simplify peeling and thickness deviation correction work of a hollow billet, to make a cutting chip into the sheet shape having a certain thickness and area, and to prevent deviation from remaining on the thickness of the billet after processing caused with the rod of a 1st center being deflected downward.
CONSTITUTION: A hollow billet pressurizing base (2) freely approachable and separatable from an annular peeling and thickness deviation correcting tool (1) is arranged at the left part thereof. A 1st center (3) is fitted freely movably in the right and left directions to the pressurizing base (2). A 2nd center (4) is arranged at the right part of the 1st center (3) so as to come on the coaxial thereto. The 2nd center (4) is made freely movably in the right and left directions relatively to the scaling and thickness deviation correcting tool (1). Plural billet loaders (7A) (7B) freely liftable are arranged abreast in the right and left direction between the peeling and thickness deviation correcting tool (1) and pressurizing base (2).
TOMITA KENJI
MATSUMOTO NORIO
