Technology-Based Recontouring of Blade Integrated Disks After Weld Repair
| Autor: | Berend Denkena, Thomas Hassel, Demian Langen, A. Mücke, Tim Schumacher |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
0209 industrial biotechnology
Contouring business.product_category Materials science Mechanical Engineering Gas tungsten arc welding Energy Engineering and Power Technology Aerospace Engineering Mechanical engineering 02 engineering and technology Welding 021001 nanoscience & nanotechnology Machine tool law.invention 020901 industrial engineering & automation Fuel Technology Nuclear Energy and Engineering Machining law 0210 nano-technology business |
| Zdroj: | Journal of Engineering for Gas Turbines and Power. 140 |
| ISSN: | 1528-8919 0742-4795 |
| DOI: | 10.1115/1.4040738 |
| Popis: | The widespread adoption of blade integrated disks (blisks) made of titanium demands tailored regeneration processes to increase sustainability and economic efficiency. High standards regarding geometrical accuracy and functional properties as well as the unique characteristics of each type of damage complicate the repair. Thus, flexible and well-designed processes are necessary. Typically, material deposit is followed by a milling or grinding process to restore the original shape. Here, the individual repair processes not only have to be controlled but also their interaction. For example, depending on the resulting microstructure of the welded seam, the recontouring process needs to be adapted to minimize tool wear as well as shape deviations of the complex blade geometries. In this paper, the process chain for a patch repair is examined, consisting of a tungsten inert gas (TIG) welding process followed by five-axis ball nose end milling. Conventional TIG as well as a modified TIG process producing a finer grain structure and enhanced mechanical properties of deposited material was investigated. Grain refinement was achieved by SiC particles added to the weld pool. Based on the characteristics of the fusion material and static stiffness of the component, a methodology is introduced to minimize shape deviation induced by the subsequent milling process. Special attention is given to tool orientation, which has a significant impact on the kinematics and resulting process forces during milling. An electromagnetic guided machine tool is used for compensation of workpiece deflection. |
| Databáze: | OpenAIRE |
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