Study on Cutting Force Modeling for Quasi Intermittent Vibration Assisted Swing Cutting
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摘要: 拟间歇振动辅助偏摆车削主要是为了提高难加工材料切削加工性而提出, 本文针对拟间歇振动辅助偏摆切削过程中切削力建模展开研究。首先, 根据薄剪切面理论分析振动辅助偏摆切削过程中瞬时剪切角和切削速度变化关系, 讨论切削力在法平面、前刀面及剪切面的变化情况。其次, 根据最大剪应力理论与切削过程中力的关系, 分析各相关角度与时间t的联系, 建立切削力解析模型。最后, 通过切削实验分析研究主轴转速和切削深度对切削力的影响。结果表明: 当主轴转速由10 r/min增加到30 r/min时, 实验和理论获得切削力值分别增加3.7 N和4 N; 切削深度由0.01 mm增加到0.03 mm时, 实验和理论获得的切削力值分别增加3.6 N和4.2 N。实验结果与理论模型分析结果变化趋势基本一致, 验证了所提出模型的有效性。Abstract: In order to improve the machinability of difficult-to-cut materials, this paper focus on the modelling of cutting force during quasi-intermittent vibration assisted swing cutting. Firstly, the relationship between the instantaneous shear angle and the cutting speed during the vibration-assisted swing cutting process is analyzed using the theory of thin shear plane, the change of cutting forces in the normal plane, rake face and shear plane is discussed. Secondly, according to the relationship between the maximum shear stress theory and the force in the cutting process, the relationship between each relevant angle and time t is analyzed to establish an analytical model of the cutting force. Finally, the effects of spindle speed and cutting depth on cutting force are studied through cutting experiments. The results shown that when the spindle speed increased from 10 r/min to 30 r/min, the cutting force values obtained by experiment and theory increased by 3.7 N and 4 N, respectively; When the cutting depth increased from 0.01 mm to 0.03 mm, the cutting force values obtained by experiment and theory increased by 3.6 N and 4.2 N, respectively. The experimental results are basically agreed with the analysis results of the theoretical model, which verifies the effectiveness of the proposed cutting force model.
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表 1 不同转速下的切削参数
切削参数 实验类型 1 2 3 振动频率/Hz 10 10 10 振幅/μm 10 10 10 主轴速度/(r·min-1) 10 20 30 切深/mm 0.03 0.03 0.03 
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表 2 不同切深下的切削参数
切削参数 实验类型 1 2 3 振动频率/Hz 10 10 10 振幅/μm 10 10 10 主轴速度/(r·min-1) 21 21 21 切深/mm 0.01 0.02 0.03
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