Flexible, externally toothed gear for a deformation shaft drive and method to manufacture one

Abstract

Method for manufacturing a flexible, externally toothed gear (1, 10, 20) for a deformation shaft drive, wherein the method comprises: in a first step (ST1) producing a cylindrical, cup-shaped or cylinder hat-shaped primary form element which has approximately the shape of the flexible, externally toothed gear (1, 10, 20) for the deformation wave gear by carrying out near-net-shape deformation of a material which contains nickel-free low-alloy steel with a silicon content of 1.45 to 1.5 wt% and with a carbon content of 0.18 to 0.23 wt%; in a second step (ST2) marting the primary shape element; In a third step (ST3), a secondary forming element is produced by performing turning and forming a toothing (6, 16, 26) on the martempered primary forming element, wherein the secondary forming element has a membrane region (3, 13, 23) and a toothing region (5, 15, 25) formed on it; and In a fourth step (ST4), shot peening of the secondary forming element to change a metal structure of a surface layer area of ​​the gearing area (5, 15, 25) and the membrane area (3, 13, 23) into martensite.