METHOD FOR MACHINING THE MAIN BEARING NECKS OF COMBUSTION ENGINE CYLINDER UNIT AND COMBINATION TOOL INTENDED FOR ITS REALIZATION Russian patent published in 1998 - IPC

FIELD: mechanical engineering. SUBSTANCE: every neck of main bearings is formed by couterboring on horizontal milling machine, with table carrying the article being machines moving in transverse direction along machine spindle axis. Combination tool is made in the form of attached counterbores positioned between intermediate rings of mandrel. Every attached counterbore is of diameter equal to that of main bearing neck, and its length is determined by formula L_c= L_neck+L_cut+L_ov,, where L_c is attached counterbore length, L_neck is length of main bearing neck, L_cut is cutting-in length, and L_ov is overtravel length. EFFECT: improved process of machining. 2 cl, 3 dwg