摘要
气门弹簧制造过程中,节距影响弹簧自由长度,从而影响气门弹簧的性能。根据实际的气门弹簧节距和线圈数,用CATIA建立数学模型,确定弹簧自由长度、节距以及弹簧圈数之间的关系。基于ABAQUS平台,以标准弹簧为力学基础,对不同超差量的气门弹簧模型进行静力学有限元仿真分析和预应力模态分析。控制超差模型和标准模型的网格、材料以及边界条件等一致,比较两者仿真分析结果,得到弹簧自由长度超差量的变化对弹簧性能的影响。仿真结果表明,弹簧自由长度偏差量绝对值的增加都将导致米塞斯应力、最大剪切应力和一阶模态的变化。应某企业要求,与标准模型相比,偏差模型的偏差极限值应该小于2.5 mm时,两个模型之间的应力偏差小于10%。因此,预设2.0 mm偏差量能够保证弹簧的制造工艺。
During the manufacturing process of valve springs, the spring pitch can greatly affect the free length of the spring and thus the performance of the valve spring. In this paper, according to the actual valve spring pitch and coil number, a mathematical model of the valve spring is established by means of CATIA to determine the relationship among the spring free length, pitch and the number of coils. Based on the ABAQUS platform, the static spring finite element simulation analysis and pre-stressing modal analysis of the valve spring model with different amount of tolerance are carried out with a standard spring as the mechanics foundation. It is shown from the simulation results that the increase of absolute value of free length deviation will cause the change of Mises stress, maximum shear stress and the first order modal of the valve spring. Compared with standard model, the deviation limitation should be below 2.5 mm, to ensure that the stress difference between the standard model and the deviation model is lower than 10 %. Thus, the preset 2.0 mm manufacture deviation is sound for manufacturing quality control.
作者
黄伟松
陈浩
蔡丽红
杨书伟
王以鹏
HUANG Weisong;CHEN Hao;CAI Lihong;YANG Shuwei;WANG Yipeng(School of Automotive Engineering, Shanghai University of Engineering Science,Shanghai 201620, China)
出处
《噪声与振动控制》
CSCD
2019年第1期56-59,109,共5页
Noise and Vibration Control
基金
上海市自然基金资助项目(18ZR1416500)
