METHOD OF RECONDITIONING OF DRIVING CHAIN SPROCKETS Russian patent published in 1998 - IPC

FIELD: mechanical engineering, in particular, reconditioning of different-purpose sprockets by surfacing method applicable for reconditioning of teeth of worn-out tractor caterpillar wheels. SUBSTANCE: gear rings are removed partially up to the sprocket pitch circle diameter, and additional components are made of a rod having a length equal to the thickness of gear rings; after reconditioning of the tooth profile sprockets are heated up to 700 to 800 C with subsequent application of burden with a layer of 4 to 6 mm thick of granular carbide alloy and boron-containing flux; the tooth surfaces are hardened by r.f. current for 30 to 120 S; the rod diameter is calculated by formula a = D_b-D_d•2,, where a - diameter of additional component rod; D_b - diameter of sprocket lugs; D_d - pitch circle diameter. EFFECT: enhanced quality.