Danieli & C. Officine Meccaniche S.p.a.

Claudio Maria Scalmana

Ettore Cernuschi

A rolling plant (R) for rolling tubes having a multi-stand rolling mill () with two or more rolls, in order to implement a controlled speed mandrel rolling process, comprises a hooking and releasing device () which is arranged in the inlet area of the rolling mill () to cooperate with the rear tang of the mandrel () and a hooking and releasing device () which is arranged in the outlet area of the rolling mill () to cooperate with the front tang of the mandrel () in coordinated manner with the first hooking and releasing device ().

Mandrel conveying device for a tube rolling mill

The rolling stand comprises four support columns (), two conical rolling rolls with skewed rolling axes which are oblique to each other and are fixed to two roll cradles (), four jacks () below the lower roll cradle () for exercising a preloading force on such a roll cradle. Four jacks () are arranged above to exercise a preloading force on the upper roll cradle () during rolling. The stand also comprises four upper hydraulic capsules ((() and four lower hydraulic capsules (),) for exercising push forces and controlling the upper () and lower () roll cradles and the rolling position of the working rolls.

Rolling stand with skewed working rolls and a roll preloading device

A tube rolling plant (R) with multi-stand rolling mill having two or more rollers, for implementing a mandrel rolling process with controlled speed has a mandrel () which is inserted into the hollow body () from the frontal opening thereof by passing it first through the rolling mill (). An opposite movement (L) with respect to the rolling direction is imparted to the mandrel () by way of the hooking device () when rolling the hollow body () and the rear end of the rolled tube () is extracted at the end of the rolling operation.

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Milan, Italy

Claudio Maria Scalmana