New high-speed precise shearing method of hard-to-cut metal bars with stress concentration

Yuanzhe Dong; Jiacheng Gao; Xiaodi Xie; Chengcheng Zhu

doi:10.1117/12.3052021

18 October 2024 New high-speed precise shearing method of hard-to-cut metal bars with stress concentration

Yuanzhe Dong, Jiacheng Gao, Xiaodi Xie, Chengcheng Zhu

Author Affiliations +

Proceedings Volume 13285, International Conference on Precision Engineering and Mechanical Manufacturing (PEMM 2024); 132850B (2024) https://doi.org/10.1117/12.3052021
Event: Second International Conference on Precision Engineering and Mechanical Manufacturing (PEMM 2024), 2024, Incheon, Korea, Republic of

Abstract

The cropping of metal bars is the first process for forming most mechanical parts. Due to the inferior section quality and low efficiency in traditional cropping methods, a new high-speed precise shearing method has been proposed for hard-tocut metal bars with prefabricated surface notches. The stress concentration effect of the surface notch is theoretically analyzed, and the fracture behavior and section quality are investigated by finite-element simulation and experimental tests for notched and unnotched high-strength 42CrMo steel and high-toughness 304 steel bars. The results show that the new method effectively inhibits the plastic deformation and high precision sections are obtained with roundness error of 2.3%-3.8%, flatness error of 0.6-1.0 mm, and maximum plastic bending deformation of 1.6-1.8 mm. Moreover, the shearing load and fracture energy also decrease significantly. The new method shows the advantages of high precision and efficiency, and low energy consumption.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Yuanzhe Dong, Jiacheng Gao, Xiaodi Xie, and Chengcheng Zhu "New high-speed precise shearing method of hard-to-cut metal bars with stress concentration", Proc. SPIE 13285, International Conference on Precision Engineering and Mechanical Manufacturing (PEMM 2024), 132850B (18 October 2024); https://doi.org/10.1117/12.3052021

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