APPARATUS FOR HEAT TREATMENT OF SHEET ARTICLES Russian patent published in 2003 - IPC

FIELD: apparatuses for heat treatment of sheet articles, mainly saw discs. SUBSTANCE: apparatus includes central strut onto which sleeve with ring is placed. Sectors and plates with support units are fixed on said ring by means of pins. Support units are arranged in sectors and plates along three circles whose radius values consist respectively 9/10, 7/10 and 35/100 of radius value of heat treated disc saw. Surface area of each support unit consists 0.05% of surface area of heat treated disc saw at total area of support units being no more than 1.5% of surface area of disc saw. Disc saws are placed onto support units, next sleeve with ring is put on and assembling operation is repeated. When the last row of sectors and plates is assembled upper plate is fit. Tightening is realized by means of wedges arranged in grooves of four struts and in central strut. EFFECT: enhanced efficiency due to one heat treatment stage for several articles, improved quality of saw discs due to their desired planeness, enhanced operational strength of saw discs due to lowered residual stresses occurred at straightening process. 3 dwg