METHOD FOR THERMOFRICTIONAL CUTTING WITH CIRCULAR SAW OF HEATED ROLLED PIPES MADE OF AUSTENITIC CHROMIUM-NICKEL STEEL WITH DIAMETER OF 120-140 mm Russian patent published in 2024 - IPC B23D45/00 

FIELD: rolled products.

SUBSTANCE: method for thermofrictional cutting of rolled pipes from austenitic chromium-nickel steels used in pipe rolling production. The method for thermofrictional cutting of heated pipes made of austenitic chromium-nickel steel with a diameter of 120-140 mm with a circular saw involves dividing a heated steel pipe with a circular saw for thermofrictional cutting of low-alloy steel containing an all-metal body with wedge-shaped cutting teeth located along the contour. The teeth contain a backward hook angle of -35°, as well as the angle between the lateral surfaces of the tooth, equal to 70°. The cutting process to a cutting depth of 80% of the outer diameter of the pipe is carried out with a saw feed equal to 8-12 μm/tooth and its feed speed in the range of 0.06-0.08 m/s. After that, the clamping device is picked up and cutting is carried out, ensuring a saw feed equal to 4-6 µm/tooth, its feed speed in the range of 0.03-0.05 m/s.

EFFECT: high quality of the surface of the ends is ensured.

2 cl, 1 tbl, 3 ex