Experimental and numerical investigation of the effect of die clearance on the cutting characteristics in the fine blanking of a complex part made of CK15 steel

Articles in Press

Document Type : Original Article

Authors

1 Sirjan University

2 Babol Noshirvani University of Technology

3 Faculty of Mechanical Engineering, Semnan University. Semnan. Iran

10.22034/ijme.2024.440510.1924

Abstract

This paper investigates the effect of die clearance on the quality of the cutting edge in the fine blanking process of a part with a complex geometry made of CK15 steel. The fine blanking process was simulated using the finite element method through DEFORM 3D software and the results were compared with the experimental results. Cutting force, distribution of stress and strain, dimensions of the radial area, surface quality, and dimensional accuracy of the workpiece were considered as fine blanking criteria. By examining the results, it was found that with increasing the die clearance, the range of equivalent strain and stress on the raw material increases and plastic deformation occurs in the material at the clearance zone. Therefore, by reducing the clearance, these areas become more concentrated, as a result, the strain of the cutting line is reduced and the cutting edge has higher precision and quality. Also, by increasing the punch force, the phenomenon of non-flatness and surface defects of the final part reduces. The results have shown that by increasing die clearance from 0.4 to 0.6 sheet thickness, the stress of the sheet increased to 25%, and the average strain increased about 82%.

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Iranian Journal of Manufacturing Engineering

Articles in Press, Accepted Manuscript
Available Online from 21 March 2024

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