Piercing mill and cannon exchange method

Details Piercing mill and cannon exchange method Piercing mill and cannon exchange method

2000-04-10

2000-12-12

Butler, Rodney A.

Metal deforming

By use of roller or roller-like tool-element

With tool inside hollow work

72250, B21B 1710, B21B 3920

Patent

active

06158262&

ABSTRACT:
A piercing mill and cannon exchange method therefor which can automate exchange of a cannon and can cope with flexible production of a variety of differently-sized seamless steel tubes in small quantities. The piercing mill including means for pivoting a cannon holder which holds a cannon and means for sliding the cannon holder along a pass line, through combined above-mentioned means, the cannon holder is pivoted so as to come into alignment with the pass line, is slid along the pass line, and is clamped at a predetermined location. The cannon exchange is characterized in that a cannon holder which retains the cannon in the direction perpendicular to the pass line is pivoted so as to come into alignment with the pass line, is slid along the pass line, and is then clamped to the main frame of the piercing mill. Therefore, it become possible to automate exchange of a cannon in accordance with a changeover and to considerably reduce working hours.

REFERENCES:
patent: 3879972 (1975-04-01), Kanai et al.
patent: 3927547 (1975-12-01), Schonfeld et al.
patent: 4592222 (1986-06-01), Muller et al.
patent: 4760724 (1988-08-01), Okazaki et al.

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