Abkanten und Kragenziehen mit der inkrementellen Blechumformung

The production technology of incremental sheet metal forming (ISF) combines high process flexibility with low component-specific tooling and thus represents a technology of great potential for the ongoing trend towards shorter product cycles and a growing variant diversity. The current state of the art of ISF and its variants indicates that an economic industrial production of components in small batch sizes at high quality standards seem feasible. The process advantages of ISF can only be entirely utilized if the complete process chain including the subsequent finalization operations - such as hole flanging and flanging - can be carried out with a minimum of component-specific tooling. Moreover an individual and flexible modification of mass products by incremental flanging operations seems feasible. The goal of the present thesis is to gain a complete fundamental understanding of flanging operations by ISF to identify the process limits and derive methods for further product improvement. For the investigations on incremental flanging operations, various machiningstrategies are applied to the basic flange types. It is identified that a single-stage strategy is sufficient and effective for the incremental forming of a flange. The application of multi-stage strategies - in contrast to the conventional ISF - does notshow any significant improvements to the general product properties. Furthermore, it is shown that - in contrast to conventional flanging - there is no dependence of the process limits to the flange radius. Solely the flange length represents a sensitive process parameter to the flange geometrical properties. A significant improvement of the geometrical accuracy with a minimum limitation of the process flexibility is achieved by application of a developed adaptive blank holder. The process limits of conventional flanging methods are significantly exceeded. For incremental hole flanging operations multi-stage strategies prove advantageous. The resulting