Method and Device for Machining Cracking Groove for Connecting Rod

• Main Authors: KOGUCHI TSUGUO, OKUMURA HIDEKI
• Format: Patent
• Language: English
• Published: 08.11.2007
• Subjects: BEARINGS; BLASTING; BROACHING; COMBINED OPERATIONS; ELEMENTS OR CRANKSHAFT MECHANISMS; ENGINEERING ELEMENTS AND UNITS; FILING; FLEXIBLE SHAFTS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; HEATING; LIGHTING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOTOTHERWISE PROVIDED FOR; MACHINE TOOLS; MECHANICAL ENGINEERING; METAL-WORKING NOT OTHERWISE PROVIDED FOR; MILLING; OTHER WORKING OF METAL; PERFORMING OPERATIONS; PLANING; ROTARY BODIES OTHER THAN GEARING ELEMENTS; SAWING; SCRAPING; SHAFTS; SHEARING; SLOTTING; TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION; TECHNICAL SUBJECTS COVERED BY FORMER USPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; THERMAL INSULATION IN GENERAL; TRANSPORTING; UNIVERSAL MACHINE TOOLS; WEAPONS

A method and a device for machining a cracking groove for a connecting rod, wherein a drive pulley is rotated under the driving action of a rotatingly driving source installed in a body to transmit the rotatingly driving force of the drive pulley to a driven pulley through a drive force transmission belt so as to rotate a groove machining part integrally connected to the driven pulley. In the groove machining part, a spindle integrally connected to the driven pulley is rotatably supported on a support part, and a saw having a plurality of blade parts on the outer peripheral surface thereof is installed on the holding part of the spindle. A first groove of roughly V-shape in cross section is formed in the large end hole of a connecting rod by inserting the metal saw into the large end hole of the connecting rod, and a second groove of roughly V-shape in cross section which is symmetrical with the first groove is formed in the connecting rod at a position opposed to the first groove with respect to the axis of the connecting rod.