The heated round
billetisfedin
the material receiveratfront
stage of hot piercing mill, thecylinder
pushthe
billetinto
thepiercing mill. After the
piercer catch the round billet, the pusher move back quickly. The
two conic-rollsarelocated
leftsideand
right side horizontally, single drive, guide shoe located upside
and downside. The piercer grab the round billet which pushed by the
cylinder pusher, and experienceelasticdeformation
under high-speed running rolls, cause a loose cavity the
centerand
the billet becomes to be a tube hollow under the function of
piercing plug.It has one set of
centering-rolls inside of main piercing stand
