Preform design of a generic turbine disk forging process
| Autor: | Ramana V. Grandhi, Tonghai Wang, Zhenduo Zhao, Guoqun Zhao |
|---|---|
| Rok vydání: | 1998 |
| Předmět: |
Engineering
business.product_category business.industry Metals and Alloys Process (computing) Mechanical engineering Aspect ratio (image) Turbine Industrial and Manufacturing Engineering Forging Finite element method Computer Science Applications Flash (manufacturing) Modeling and Simulation Ceramics and Composites Die (manufacturing) Boundary value problem business |
| Zdroj: | Journal of Materials Processing Technology. 84:193-201 |
| ISSN: | 0924-0136 |
| Popis: | This work uses the finite-element-based inverse die contact tracking method to design the preform die shapes of a generic turbine-disk forging process. First, for a one-stage forging process, folding defects, extensive flash and underfill resulting from using an improper initial billet size are investigated. Trial forward simulations are performed while varying the height-to-diameter ratio and the optimal aspect ratio of the initial billet for a one-stage forging process is determined. Second, the preform die shapes for a two-stage forging process are designed using the back-stage process. The boundary condition control criterion for the backward simulation is determined by the inverse die contact tracking method. In addition, the optimal ratio of height-to-diameter of the billet is also determined for the preforming stage to achieve a sound preform shape. Finally, the preform design results, including the preforming stage and the final forging stage, are verified by forward simulation. The simulations show that the sequence and newly designed preform die shapes can achieve a net-shape part that avoids the folding defects and reduces the die wear. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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