FIELD: metallurgy.
SUBSTANCE: roll of a pilgrim mill comprises a stream of round cross section with tangential outlets along barrel circumference. The length of the stream is made from a serially arranged striker with an angle Θs=90°, a polishing section with an angle Θp=70°, an angle of a longitudinal outlet with an angle Θl.o.=40° and an idle section with an angle Θi=160°. The angle of the transverse outlet on the striker from the point "0" to the angle αs=(17-20)° is made as permanent and equal to the angle 35° of the transverse outlet of the idle section. On the section of the striker αs=(70-73)° the angle of the transverse outlet is made as gradually decreasing from 35° to (26-28)°. On the polishing section the angle of the transverse outlet is made as permanent (26-28)°, and on the angle of the longitudinal outlet and the part of the idle section as equal to Θl.o.+10°. The angle of the transverse outlet is made as gradually increasing from (26-28)° to 35°.
EFFECT: reduced number of defects in pipes in the form of breaks, reduced metal consumption coefficient.
1 dwg
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