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    • 3. 发明公开
    • PROCEDURE FOR PRODUCTION OF PARTS THAT SHOWS COGS
    • 用于生产牙齿有一部分
    • EP1948384A1
    • 2008-07-30
    • EP06747966.7
    • 2006-06-28
    • X-Marketing
    • KOPPELOMÄKI, Leo
    • B23F5/14B23F9/04
    • B21D53/28B21K1/30
    • A procedure for manufacturing components (21) which exhibit gear teeth (5) and gear wheels (2), gear tracks (3), gear racks, bevel drives etc. for creating hard, durable gear teeth (5) from an ultra high-strength deep drawn or stretch bent steel product (14), consisting of a metal blank made of iron, which has been alloyed with chromium, nickel and carbon in pre-determined proportions, the blank having been formed in a cold drawing or cold bending operation in a plastic state at a predetermined temperature in order to produce considerably increased deformation hardening in the steel, whereafter the components (21) are manufactured from steel plate (1) which has been made from the steel (14) by means of a press tool (7), whereupon in a Stage 1 the steel plate (1) is set up with a tool (6), which is intended to shape the teeth (5) in selected portions of the steel plate (1), whereafter in a Stage 2 the press tool (7) makes a movement in a direction towards the surface (9) of the steel plate and forms the surface against the tool (6), creating a gear formation (10) with peaks (12) and interspersed valleys (11), which in a Stage 3 forms drawn/stretched areas in the peaks (12) and valleys (11) in the steel plate (1), leading to considerably increased strength or increased tensile yield limit in the gear teeth (5), compared with the tensile yield limit of the metal in the blank.