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International Standard Serial Number:
ISSN 1001-4551
Sponsor:
Zhejiang University;
Zhejiang Machinery and Electrical Group
Edited by:
Editorial of Journal of Mechanical & Electrical Engineering
Chief Editor:
ZHAO Qun
Vice Chief Editor:
TANG ren-zhong,
LUO Xiang-yang
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Abstract: Aiming at the problem of the frequent hub axle breakage of passenger vehicle hub axle at the end customers use, the fracture causes of hub axle was analyzed and investigated, and the hub axle loading capability under different heat treatment process conditions was further studied. First, the cause of the fracture of the existing passenger vehicle hub axle was systematically analyzed, the fracture mode was evaluated, and the optimization direction was proposed. Then trial production and performance measurement of the hub axle samples under four type heat treatment conditions were carried out.Finally the static pressure, impact, stiffness, fatigue strength comparative test and analysis of the hub axle loading capacity under four type heat treatment conditions were carried out. The study results show that: compared with the hub axle whose surface is quenched and tempered, static load bearing capacity of the hub axle without surface quenching and tempering is increased by 60%, and impact resistance is increased by at least 26%, and dispersion of fatigue strength life is decreased,at the same time, the technical requirement of no plastic deformation under 1.2 G load conditions can be meet. After the process improvement is carried out, the fracture safety accident is completely eliminated in practical applications.
Key words: rigidity test; static pressure test; impact load; fracture failure; fatigue strength life;material heat treatment