Influence of Superimposing of Oscillation on Sheet-Bulk Metal Forming

Abstract

Due to novel processes like sheet-bulk metal forming, the requirements for sheet metal forming are increased. Sheet-bulk metal forming is a new interconnected process in which the part itself is manufactured by deep drawing and the gearing will be produced with bulk forming in a combined process at room temperature. This process is characterized by a triaxial state of stress and a triaxial dimensional change with true strains up to  = 1-2 by using sheet blanks. Within the use of superimposing of oscillation on a sheet-bulk metal forming process the required forming force can be reduced and the accuracy of dimension of the part can be improved. Within this paper the influence of the superimposing of oscillation on the sheet bulk metal forming will be shown on combined ironing and external extrusion process. For the superimposing of oscillation different excitation frequencies will be analysed. Furthermore the die clearance will be varied to increase the requirements on the process. Finally the influence of the different excitation frequencies and the different die clearances will be summarized in cause and effect relationship diagram.

Metrological solutions for an adapted inspection of parts and tools of a sheet-bulk metal forming process

“…The third stage of the new SBMF process is used for the calibration of the internal and external toothing [1]. The active tool elements of the individual stages were integrated in a modular tool system [2]. This modular tool system with its active tool elements for the second forming stage is depicted in Fig.…”

Numerical and Experimental Investigations of Multistage Sheet-Bulk Metal Forming Process with Compound Press Tools

“…The new multistage SBMF process will be applied to an existing modular tool system shown in Fig. 1 a) [5]. Fig.…”

Sheet-Bulk Metal Forming of Symmetric and Asymmetric Parts

“…The components of the part are produced in several process chains [2]. Novel processes like sheet-bulk metal forming combine sheet and bulk metal forming to produce sheet metal parts with functional components and have an enormous potential to shorten the process chain [3] and at the same time to reduce the manufacturing costs [4]. The shortening of the process chain for a gear wheel conventionally produced of two parts in two separate processes which are subsequently joined is demonstrated in [5].…”