CUT-OFF DISK AND METHOD FOR MANUFACTURE OF CUT-OFF DISK Russian patent published in 1997 - IPC

FIELD: mechanical engineering. SUBSTANCE: cut-off disk has metal body 1 and slots 2 positioned circumferentially of body 1 to form cutting teeth 3. Wear-resistant material 5 is faced on side surfaces 4 of cutting teeth 3. Annular grooves 6 and radial channels 7 made on side surfaces 4 intersect to define microprojections 8. Grooves 6 and channels 7 made on one side surface 4 are offset relative to grooves 6 and channels 7 made on other side of tooth for distance at least equal to 0.3 the distance between axial lines of adjacent grooves. Method involves effectuating laser cutting of body 1 of predetermined diameter from metal blank; cutting receptacle opening in body 1; making annular grooves 6 and radial channels 7 in peripheral portions of body 1 at distance equal to tooth height, with grooves 6 and channels 7 being initially made on one side of body 1, then on other side so that grooves and channels on one side are offset relative to grooves and channels on opposite side of body 1; providing laser cutting of slots 2 in accordance with programme to form cutting teeth 3; applying layer of wear-resistant powder material to side surfaces 4 of teeth 3, with layer having predetermined thickness; fusing applied material with focused laser beam in shielding medium of argon or other inert gas. Fused adhesive layer 5 obtained on side surface 4 of teeth 3 is a product of reduction chemical reaction of metal oxides by fused material. EFFECT: increased efficiency, improved strength and wear-resistance of tools and enhanced reliability in operation. 6 cl, 5 dwg