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 αo=ϕo=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
Title | Year | Author | Number |
---|---|---|---|
METHOD FOR THERMO-FRICTION CUTTING WITH DISC SAW OF HEATED PIPE WITH DIAMETER OF 40-120 mm FROM AUSTENITIC CHROMIUM-NICKEL STEEL | 2021 |
|
RU2767341C1 |
METHOD FOR THERMAL FRICTION CUTTING OF HEATED PIPE WITH DIAMETER OF 120-200 mm FROM AUSTENITIC CHROMIUM-NICKEL STEEL WITH DISK SAW | 2021 |
|
RU2767354C1 |
METHOD FOR THERMO-FRICTION CUTTING OF HEATED ROLLED PIPE WITH DIAMETER OF 120-200 mm FROM LOW-ALLOY STEEL WITH DISK SAW | 2021 |
|
RU2767362C1 |
METHOD FOR THERMO-FRICTION CUTTING OF HEATED ROLLED PIPE WITH DIAMETER OF 120-200 mm FROM LOW-CARBON STEEL WITH DISK SAW | 2021 |
|
RU2767368C1 |
METHOD FOR THERMO-FRICTION CUTTING OF HEATED ROLLED PIPE WITH DIAMETER OF 120-200 mm FROM LOW-CARBON STEEL WITH DISK SAW | 2021 |
|
RU2767366C1 |
METHOD FOR THERMO-FRICTION CUTTING OF HEATED ROLLED PIPE WITH DIAMETER OF 40-120 mm FROM LOW-CARBON STEEL WITH DISK SAW | 2021 |
|
RU2767363C1 |
METHOD FOR THERMAL FRICTION CUTTING WITH A CIRCULAR SAW OF HEATED ROLLED PIPE WITH A DIAMETER OF 120-200 MM MADE OF LOW-ALLOY STEEL | 2021 |
|
RU2765008C1 |
METHOD FOR THERMO-FRICTION CUTTING OF HEATED ROLLED PIPE WITH DIAMETER OF 40-120 mm FROM LOW-ALLOY STEEL WITH DISK SAW | 2021 |
|
RU2767360C1 |
METHOD FOR THERMOFRICTIONAL CUTTING WITH CIRCULAR SAW OF HEATED ROLLED PIPES MADE OF AUSTENITIC CHROMIUM-NICKEL STEEL WITH DIAMETER OF 120-140 mm | 2023 |
|
RU2811876C1 |
METHOD FOR THERMOFRICTION CUTTING WITH A CIRCULAR SAW OF HEATED ROLLED PIPES WITH A DIAMETER OF 40-120 MM MADE OF AUSTENITIC CHROMIUM-NICKEL STEEL | 2020 |
|
RU2750071C1 |
Authors
Dates
2022-03-17—Published
2021-03-26—Filed