OIL RING WIRE ROD MANUFACTURING METHOD

• Main Authors: KITAZONO DAISUKE, KOMIYA SEIJI, OCHIAI MASANORI, KARAOKE TAKAO, SASAKI ATSUSHI
• Format: Patent
• Language: English
• Published: 25.10.2007
• Subjects: ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES; BLASTING; COMBUSTION ENGINES; CYLINDERS; CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; LIGHTING; MECHANICAL ENGINEERING; PISTONS; SEALINGS; THERMAL INSULATION IN GENERAL; WEAPONS

PROBLEM TO BE SOLVED: To provide a method of manufacturing a small-section two-piece-type oil ring wire rod for reducing man-hours with no performance deterioration of an oil ring. SOLUTION: The method of manufacturing the two-piece-type oil ring wire rod with its approximately H-shaped cross section having a circumscribed circle diameter of 10 mm or smaller, which has a plurality of through-holes in the longitudinal direction of the wire rod, comprises a perforating step of laser-perforating the predetermined-size through-holes in the face of the oil ring wire rod corresponding to the outer peripheral face of the oil ring, and then a step of giving blasting treatment to the face of the oil ring wire rod corresponding to the inner peripheral face of the oil ring to form a blasting-treatment face with its surface roughness of maximum height Rz=10 μm or lower. COPYRIGHT: (C)2008,JPO&INPIT