METHOD FOR THERMAL FRICTION CUTTING OF HEATED PIPE WITH DIAMETER OF 120-200 mm FROM AUSTENITIC CHROMIUM-NICKEL STEEL WITH DISK SAW Russian patent published in 2022 - IPC B23D45/12 

Abstract RU 2767358 C1

FIELD: technological processes.

SUBSTANCE: invention relates to the technology of thermo-friction cutting with a disk saw heated to temperature of 1150–1250 °C from pipe rolling from austenitic chromium-nickel steels and can be used, for example, in pipe rolling production. Method for thermo-friction cutting with a disk saw heated to temperature of 1150–1250 °C from a pipe with diameter of 120–200 mm from austenitic chromium-nickel steel includes separation of a heated steel pipe by a disk saw for thermal friction cutting from low-alloy steel, containing all-metal body with wedge-shaped cutting teeth located along contour, each of which contains front negative angle equal to −20°, angle between tooth side surfaces equal to 40°, positive back angle α, as well as side angle of saw tooth bevel ϕ. Heat-friction cutting of heated pipe from austenitic chromium-nickel steel with diameter of 120 mm is carried out using a disk saw with the same sharpening angles of each tooth α and ϕ equal to 10°, for large diameters of cut steel pipes from the proposed range, the back angle is determined by the formula: α=αo-k1⋅ΔD, and side angle of saw tooth ϕ - by formula: ϕ=ϕo-k2⋅ΔD, where αoo=10°, coefficient k1=0.05°/mm, k2=0.025°/mm, ΔD is an increase in the diameter of the cut pipe, mm, compared to diameter of 120 mm, wherein saw feed makes 6–7.2 mcm/tooth and feed rate makes 0.04–0.06 m/s.

EFFECT: improvement of quality of surface of ends of workpieces after cutting and increase in durability of disk saws.

1 cl, 2 dwg, 1 tbl

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RU 2 767 358 C1

Authors

Bannikov Aleksandr Ivanovich

Gurevich Leonid Moiseevich

Bannikov Aleksej Aleksandrovich

Makarova Olga Aleksandrovna

Pisarev Sergej Petrovich

Pronichev Dmitrij Vladimirovich

Kazak Vyacheslav Fedorovich

Dates

2022-03-17Published

2021-03-26Filed