Description

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