FIELD: metallurgy.
SUBSTANCE: shear disc for cutting sheet materials contains a body of structural steel and a working ring of high-speed or semi-heat-resistant steel. The structural steel body is made with hardness of 43-47 HRC. The operating ring of high-speed or semi-heat-resistant steel with hardness of 60-62 HRC, which is replaceable, is pressed onto the body and fixed to it by means of evenly spaced weld points in the amount of 12-48. The end of operating ring is displaced axially relative to the body by 1-3 mm. The knife is thermally processed after assembly to relieve internal stresses.
EFFECT: increasing the durability of shear disc and eliminating the pitting and chipping of cutting edges.
3 dwg
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