Manufacturing Technology 2020, 20(3):368-372 | DOI: 10.21062/mft.2020.047

Unconventional design of the mechanical crank press developed by the topology optimization

Karel Raz, Milan Cechura, Vaclac Kubec
Department of Machine Design, Faculty of Mechanical Engineering, University of West Bohemia in Pilsen. Univerzitni 2732/8, 301 00 Pilsen. Czech Republic.

This article deals with the design optimization of the mechanical crank press. These presses have not any signifi-cant development changes in a long time. Mechanical press LDC 250 with nominal force 2.5 MN (250 tons) was considered as an example. This type of press can be used for operations such as bending, drawing or cutting. The topology optimization was used during this research. This papers show advantage of this design method. The op-timized press has lower maximal Von-Mises stress in the structure and the maximal displacement is up to two times lower. The research was focused on the main frame (open frame with shape ?C?) of the press. The resistivity aga-ings vibrations was improved. The weight of the frame was not changed. The CAE tool NX Nastran and the opti-mization tool Frustum were used here. The workflow of the topological optimization is deeply described here. The comparison between the conventional (initial) and optimized design shows new approach to these machines.

Keywords: Forging, topology optimization, frame, design
Grants and funding:

The Czech Ministry of Education, Youth and Sports under the project CZ.02.1.01/0.0/0.0/16_026/0008404 “Machine Tools and Precision Engineering” financed by the OP RDE (ERDF).

Received: May 1, 2020; Accepted: July 20, 2020; Prepublished online: September 3, 2020; Published: September 7, 2020  Show citation

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Raz K, Cechura M, Kubec V. Unconventional design of the mechanical crank press developed by the topology optimization. Manufacturing Technology. 2020;20(3):368-372. doi: 10.21062/mft.2020.047.
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