The influence of auxiliary gases in the optimized analysis of pulsed laser grooving of a C70S6 connecting rod for fracture splitting

Kou, Shuqing; Gao, Yan; Gao, Wei

doi:10.1016/j.rinp.2017.01.004

Cited by 7 publications

(1 citation statement)

References 10 publications

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“…Finally, the crack initiation followed by unstable propagation, the connecting rod cover is separated from the rod body, and the quasi-brittle fracture surface with good meshing is obtained. The purpose of the pre-processed crack notch is to generate stress concentration and promote crack initiation, thereby realizing low stress quasi-brittle fracture of the connecting rod [1][2][3]. The fracture-split process of the connecting rod can obtain the staggered joint surface, which can realize the three-dimensional precise positioning of the connecting rod and the cover.…”

Section: Introductionmentioning

confidence: 99%

Study on Fracture-Split Performance of 36MnVS4 and Analysis of Fracture-Split Easily-Induced Defects

Shi

Kou

2018

Metals

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The material 36MnVS4 is the second generation of connecting rod fracture-split material. However, it generates more quality defects during the fracture-split process. To investigate the causes of defects that occurred, the material properties and fracture-split performance of the 36MnVS4 are researched and compared with C70S6. The fracture-split easily-induced defects are also analyzed. By finite element simulation and experimental analysis, the results show that the 36MnVS4 has lower carbon content and more ferrite, therefore the fracture surface of the 36MnVS4 connecting rod is more prone to tears and the plastic deformation range is greater. The fracture speed of the 36MnVS4 connecting rod is 20% lower than that of the C70S6 connecting rod. The slower fracture separation rate increases the possibility of defects generation. The crack initiation position of the 36MnVS4 connecting rod is random, scattered, and unstable, and the 36MnVS4 has higher gap sensitivity. Therefore, the 36MnVS4 connecting rod is more prone to produce quality defects in the fracture-split process. By changing the cross-section design, the outer edge of the joint surface is changed to arc-shaped, which can improve the fracture-split process of the 36MnVS4 connecting rod and reduce the processing defects.

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Section: Introductionmentioning

confidence: 99%