Description
Repairing technologies enable a huge economical potential, especially in high-technology sectors like the aerospace industty with complex capital goods. Companies in These industries retain their knowledge conceming repair technologies, in order to maintain the advantage over their competitors. Thus, the quantity of publications dealing with technological challenges and scientific basics for repairing are limited. The main purpose of this literature review is to collect published information on common technologies regarding the regeneration of turbine blades to extract scientific Basics and to present challenges that are currently unattended. The attention of this paper is focused particularly on the machining process. Due to the variety of damages on engine blades, the general process chain has to be adapted partly or in whole for each cornponent. In the second part of tbis paper, a General process chain for regeneration is presented, including a classification of repair methods. The main interest of the third part addresses the recontouring, which is the final shape cutting of repaired engine blades. At this point, the previous Research and occuring challenges are pointed out in two stages related to the machining process-before and during machining. In the last part, the achievable workpicee quality after machining is discussed.
