共查询到20条相似文献,搜索用时 125 毫秒
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超声振动车削TC4钛合金的切削性能研究 总被引:1,自引:0,他引:1
为了探究超声振动车削过程中切削力和切削温度的变化规律,使用Third Wave Advant Edge切削仿真软件,基于POWER-LOW本构模型和ALE网格划分方法建立TC4钛合金车削加工的有限元模型,获得传统车削与超声振动车削的切削力和最高切削温度变化情况。结合超声振动车削中刀具切削速度和位移变化规律,对传统车削与超声振动车削的切削力和最高切削温度变化规律展开对比分析;探究超声振动车削中的工件进给速度、刀具振频和振幅对切削力的影响规律,实现各加工参数的最优组合,为实际加工提供参考。 相似文献
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金刚石刀具精车硅铝合金的正交试验研究 总被引:7,自引:0,他引:7
通过用金刚石刀具车削硅铝合金的切削试验,应用正交试验,比较了各个切削参数对切削力和表面粗糙度影响的显著程度及各个切削参数的变化对切削力和表面粗糙度的影响。证实用金刚石刀具车削硅铝合金可以获得优良的表面粗糙度和小的切削力。 相似文献
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以高速车削45钢为研究对象,针对高速车削颤振问题,通过绘制稳定性叶瓣图得到无颤切削参数。利用Third Wave AdvantEdge有限元分析软件,基于无颤切削参数设计正交试验,运用极差分析法得到切削用量对各切削力的影响主次顺序和最优组合。根据仿真试验结果,建立了车削力预测模型并检验了回归模型的可靠性。通过单因素试验法分析研究了各切削参数对车削力的影响规律,从减小车削力和提高高速车削加工稳定性方面出发,在所选参数范围内得出了高速车削45钢时的最优参数组合为:v=1200m/min,f=0.05mm/r,ap=0.2mm。 相似文献
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虚拟数控车削物理仿真模型及实用系统的开发 总被引:7,自引:0,他引:7
建立了车削加工动态物理仿真模型及相关切削力、随机振动及干扰分析的子模型,同时应用该仿真系统进行了某典型零件的物理仿真,并提供了关于瞬时切削力、切削振动及各统计数据的输出结果。 相似文献
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高速切削加工过程中切削参数的选择对刀具切削性能具有较大的影响。镍基高温合金因在高温条件下仍具有较高的抗疲劳强度、屈服强度、抗拉强度等特点,被广泛应用于航空航天、船舶、核电等行业。但是镍基高温合金的切削加工性能差,主要表现在切削力大、切削温度高、刀具磨损现象严重等方面。本文从切削速度、进给量、切削深度等切削参数对切削力的影响进行研究,同时对PCBN刀具磨损形貌进行分析。采用PCBN刀具进行高温合金车削试验,得到PCBN刀具切削高温合金GH4169时切削参数对切削力的影响规律,并探讨不同刀具磨损形貌产生的原因,为高温合金高速切削加工参数制定及工艺优化提供一定参考。 相似文献
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Surface roughness and cutting force prediction in MQL and wet turning process of AISI 1045 using design of experiments 总被引:1,自引:0,他引:1
This paper presents an investigation into the MQL (minimum quantity lubrication) and wet turning processes of AISI 1045 work
material with the objective of suggesting the experimental model in order to predict the cutting force and surface roughness,
to select the optimal cutting parameters, and to analyze the effects of cutting parameters on machinability. Fractional factorial
design and central composite design were used for the experiment plan. Cutting force and surface roughness according to cutting
parameters were measured through the external cylindrical turning based on the experiment plan. The measured data were analyzed
by regression analysis and verification experiments were conducted to confirm the results. From the experimental results and
regression analysis, this research project suggested the experimental equations, proposed the optimal cutting parameters,
and analyzed the effects of cutting parameters on surface roughness and cutting force in the MQL and wet turning processes. 相似文献
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数控车床上圆弧螺纹的宏程序编程与加工 总被引:1,自引:0,他引:1
主要讨论了在数控车床上对圆弧螺纹的加工.利用FANUC Oi-TC系统数控车床提供的宏功能为各种直径和螺距的圆弧螺纹加工编制了通用的数控车削程序,并详细说明了圆弧螺纹刀具选择和宏程序的参数设置方法.在程序中巧妙地结合了普通车床车削梯形螺纹时应用的各种工艺技巧,提供了一种有较高实用价值的加工程序. 相似文献
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Tao Chen Suyan Li Bangxin Han Guangjun Liu 《The International Journal of Advanced Manufacturing Technology》2014,72(9-12):1639-1645
This work investigates the cutting force and surface micro-topography in hard turning of GCr15 bearing steel. A series of experiments on hard turning of GCr15 steel with polycrystalline cubic boron nitride (PCBN) tools are performed on a CNC machining center. Experimental measurements of cutting force, 3D surface micro-topography, and surface roughness of the workpiece are performed. The 3D surface micro-topography of the workpiece is discussed, and the formation mechanism of the 3D surface is analyzed. The influence of cutting speed and feed rate on cutting force and surface roughness are discussed. The 2D and 3D surface roughness parameters are compared and discussed. It is found that feed rate has greater influence on cutting force and surface roughness than cutting speed and there exists the most appropriate cutting speed under which the minimum surface roughness can be generated while a relatively small cutting force can be found. Recommendations on selecting cutting parameters of hard turning of GCr15 steel are also proposed. 相似文献