摘要
铣削加工时铣削力周期性变化,引起的工件动态应力和应变对残余应力及振动有重要影响,明确铣削过程中的动力响应规律可以有效调控残余应力的产生与再分布。以铝合金工件为例,基于ABAQUS仿真软件建立了三维动态铣削仿真模型,获得了不同铣削时刻工件应力场的分布规律,分析了铣削不同位置时工件的动力响应特性。通过铣削实验测量了工件的动态应变和铣削力,并分析了加载频率对动力响应的影响。结果表明:铣削加工边缘时更易出现应力波峰和应力集中现象;不同加载频率下应变的波动频率恒定为267Hz,应变波动的最大范围为40με;工件的动力响应与铣削位置紧密相关。
Abstract
The dynamic stress and strain of the workpiece caused by periodically varying milling forces have an important influence on the residual stress and vibration. Defining the dynamic response during milling process can regulate the generation and redistribution of residual stress effectively. Taking the aluminum alloy thin plate as an example, a 3D dynamic milling simulation model was established based on simulation software ABAQUS. The distribution of stress field at different milling moment was obtained, and the dynamic response characteristics of the workpiece when milling different position were analyzed. By conducting milling experiment, the dynamic strain and milling force of the workpiece were measured, and the influence of the loading frequency on the dynamic response was analyzed. The results show that stress wave and stress concentration are more likely to occur when milling along edge; the fluctuation frequency of strain at different loading frequencies is constant at 267 Hz, and the strain varies within the range of 40 με; the dynamic response of the workpiece is tightly associated with the milling position.
关键词
铣削过程 /
铝合金薄板 /
动力响应 /
有限元仿真
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Key words
milling process /
aluminum alloy thin plate /
dynamic response /
FEM simulation
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李广伦1,姜兆亮1,2,赵丽1,陈佳1.
铝合金薄板的铣削动力响应特性仿真与实验研究[J]. 振动与冲击, 2020, 39(11): 63-68
LI Guanglun1, JIANG Zhaoliang1,2, ZHAO Li1, CHEN Jia1.
Simulation and experimental study on dynamic response of milling aluminum alloy thin plate[J]. Journal of Vibration and Shock, 2020, 39(11): 63-68
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脚注
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