Rake angle control for shears and the like

• Main Author: JONES, JR.; CLARENCE O
• Format: Patent
• Language: English
• Published: 07.06.1977
• Subjects: BROACHING; FILING; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOTOTHERWISE PROVIDED FOR; MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR; PERFORMING OPERATIONS; PLANING; SAWING; SCRAPING; 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; TRANSPORTING

The invention relates to hydraulically powered shears for metal sheets and plates and particularly to an improvement in the means for adjusting and controlling the rake angle or slope of the movable shear knife in such machines. In the present disclosure a rod member is pivoted at one end and normally is disposed along a line parallel to the direction of reciprocation of the ram of the shear. The upright member has a cable connection with a servo valve which controls the fluid circuitry of the shear to adjust the relative positions of the hydraulic motor means at opposite sides of the ram to change the inclination of the ram.