TOOL FOR WORKING RUBBER ENDS OF HOSES WITH METAL BRAIDING Russian patent published in 1998 - IPC

FIELD: mechanical engineering. SUBSTANCE: tool has casing formed as rod for working hose internal surface or sleeve for working hose outer surface. Casing has shank positioned at its one side and adapted for attachment of casing in machine and guide for inserting casing into working zone. Working part of tool formed as saw-shaped helical groove is made on cylindrical surface of casing. Helical groove is profiled as scalene trapezium. One side of profile is extending in vertical plane and other side is inclined at an angle β of 5-20 deg. Entry part of helical groove is flat sharpened at an angle ω₁ of 50-80 deg to tool axis, with this angle being less than lead angle ω of 70-85 deg. Intersection of helical groove and flat sharpened portion defines cutting edge with sharpening angle equal to angle of inclination of side surface. Helical groove may have one to four entries. Flat sharpening is performed at each entry. EFFECT: increased efficiency and improved quality of worked ends of high-pressure hoses prior to assembly and other related operations. 2 cl, 7 dwg