| 摘要 |
PURPOSE:To roll a tooth profile member of high accuracy with a low energy loss by pinching by a rack type tool approaching each other in opposition a blank of a discoid stock, bar stock, etc., after heating the surface layer thereof in a specific depth by an induction heating with rotating the blank. CONSTITUTION:The blank W of a bar stock is rotated by pivotally supporting by center shafts 2, 2. The induction heating coil C consisting of parallel heating conductors C1, C2, the connection conductor C3 linking these, a connection conductor C4 linking to a power source, etc., is located by approaching it in an arrow mark B direction. The surface layer of the part to be rolled of the blank W is subjected to an induction heating by said coil C and heated at a specific temp. until the specific depth complied with the plastic working degrees. The coil C is thereafter retreated in an arrow mark A direction. A set of rack type tools 1a, 1b in parallel at a specific interval are then moved in the arrow mark direction approaching each other to rotate the blank W by pinching it from up and down. The danger of a surface decarbonization is eliminated by the process for said short time to roll the tooth profile member of a spline, etc., with high accuracy. The obtd. tooth profile member can easily be hardened by rapidly cooling it immediately. |
