Roll pilger rolling pig WALLED TUBES of hard steels and alloy size 630 × 56 mm for nuclear power facilities from the barrel and hollow ingots ESR SIZE 690-720 × 70-90 × 50 mm 3400 ±

摘要

1. A roller mill for pilger rolling of mother tubes thick of hard steels and alloys size 630 × 56 mm for nuclear power facilities of the sleeves and the hollow ingot electroslag remelting size 690-720 × × 70-90 3400 ± 50 mm, the barrel having circumferentially working and idle part length respectively 210 and 150 °, the working portion includes circular section groove with transverse tangential outlets, the length of which is composed of successive firing pin, extending from 0.47 to 0.48 of the total length awns working portion with an angle transverse release, changing the length of the striker from 32-37 ° to 20-25 ° in a transition section for a polishing portion, whose cross section is formed decreases depending on the change of roll crown magnitude on the radius of 160 to 170 mm, polishing portion extending from 0.33 to 0.34, whose cross section is formed gradually decreasing to half of the calculated value of the profile of the finished tube, the longitudinal angle of release, length of from 0.19 to 0.20, whose cross section is formed depending increasing by changing the radius of the longitudinal discharge angle, characterized in that the pin length is from 0.61 to 0.62, the polishing portion from 0.23 to 0.24, and a longitudinal discharge angle from 0.14 to 0.15 of the total length of the working valka.2 part. The roller according to claim 1, characterized in that the anvil roller having a central angle of 130 °, a common compression-pressure reduction and hollow sleeves electroslag remelting ingots of 60 to 90 mm at the barrel comprises a circumferential groove with a transverse decreasing releases from 37 to 25 °, broken into three sections 25, 35 and 70 °, a smooth distribution of compression di