MACHINE WITH ENDLESS FLEXIBLE WORKING MEMBER Russian patent published in 2002 - IPC

FIELD: production and working of various hard materials by cutting, for instance, stone cutting and working, more specifically, machines for production and working of stone by means of endless flexible working member. SUBSTANCE: machine includes at least one endless flexible working member movable tightened with the help of tightening guide apparatus movably secured to machine frame, cutting feed drive, device for transmission of motion to endless flexible working member kinematically connected with machine main drive frame and table for installation of blank. Tightening guide apparatus has at least three sectors installed on sections of bending of endless flexible working member. Guide rollers with circular recesses rotating round their axes are secured to said sectors over curvature connecting rectilinear parts of endless flexible working member. One sector nearest to blank has at least one tie-rod with sector nearest in direction of feed for cutting which is flexibly controlled, and the other sector nearest to blank has a device for transmission of motion installed between blank and guide rollers. Endless flexible working member is movably secured in said device for motion transmission. Machine table may have mechanism for blank turning in plane of cutting. Roller displaced relative to direction of motion of endless flexible working member may be installed between blank and guide apparatus. Circular recesses of guide rollers may have layer of antifriction coating. Motion transmission device may be secured by hinging and may be self-adjusted in direction of tensioning of endless flexible working member. Motion transmission device may have apparatus for producing longitudinal ultrasonic vibrations of endless flexible working member. Flexible controlled tie-rod may be supplied to sector which is not nearest to blank. EFFECT: increased service life of endless flexible working member, reduced power consumption and amount of production wastes. 7 cl, 5 dwg