共查询到19条相似文献,搜索用时 125 毫秒
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针对玻璃纤维增强复合材料(GFRP)进行铣削力研究,以切削参数(主轴转速、进给速度、进给量)为自变量进行L_(27)(3~(13))正交试验,分析其对GFRP铣削力的影响。试验表明,铣削力随进给速度、铣削深度的增大而增大,随主轴转速的增大而减小。对铣削力做多元回归分析,建立相关数学模型并通过显著性分析验证其合理性,有助于分析切削参数对铣削力的影响规律。 相似文献
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《机械科学与技术》2017,(11):1740-1746
刀具角度与切屑的形成、铣削力、铣削温度、刀具磨损和被加工表面质量有着重要的联系。为了分析刀具几何角度对第一变形区铣削温度的影响,利用Advant Edge对U71Mn铣削过程建立了3D仿真模型;同时,采用K型人工热电偶测量了第三变形区—刀/工面处铣削温度,并探究了工艺参数对铣削温度的影响规律。试验结果表明:随着刀盘转速、进给速度和背吃刀量的增加,铣削温度逐渐升高;其中,刀盘转速和背吃刀量对切削温度有着更为显著的影响,而进给速度的影响则较小。然后采用红外热像仪对第二变形区刀/屑面的铣削温度进行了测量,并将在同一切削参数条件下人工热电偶与红外热像仪的实测温度与仿真结果进行了比较,结果表明所建3D仿真模型的有效性。最后,在上述所建模型基础上仿真分析不同刀具角度对第一变形区切削温度的影响,为铣刀盘刀具结构设计提供一定的指导意义。 相似文献
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针对Al_2O_3/TiC陶瓷材料铣削过程,采用离散元模拟软件PFC3D建立离散元模型,模拟裂纹的扩展情况,得到不同进给速度、铣削深度、铣刀球头直径下的铣削力图线以及裂纹数,并优化加工参数。通过铣削试验验证离散元模拟结果的正确性。基于模拟结果与试验结果相一致,得到不同铣削参数与铣削力、陶瓷材料裂纹数之间的变化规律:随进给速度增大,铣削力随之增大,裂纹数先减小后增大;随切削深度增大,铣削力与裂纹数增大;铣刀球头直径增大,铣削力变化不大,裂纹数随球头直径的增大而增大。 相似文献
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本文旨在探讨在VDL-600A立式加工机床上使用KC72S刀具对蠕墨铸铁进行铣削时,铣削速度、进给量和背吃刀量对切削力的影响。通过对当前蠕墨铸铁铣削切削力研究现状的分析,发现铣削速度是对切削力影响最为显著的因素。较高的铣削速度会导致更大的切削力,这可能是由于高速铣削时刀具与工件之间的摩擦力增加所致。相比之下,背吃刀量和进给量对切削力的影响相对较小。这可能是因为这两个因素对切削过程中刀具与工件之间的接触面积变化不大。对蠕墨铸铁进行铣削时,需要着重考虑调整铣削速度,相对而言,背吃刀量和进给量的调整对切削力影响较小。 相似文献
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金刚石圆锯片锯解花岗石切削力及参数优化的实验研究 总被引:2,自引:0,他引:2
基于金刚石圆锯片锯解花岗石的切削力正交实验研究,对切削速度、进给速度和背吃刀量三因素影响切削力的显著性进行极差分析,得出切削力Fx、Fy、Fz随切削速度的增大而减小,随进给速度和背吃刀量的增大而增大的变化趋势。通过回归分析建立切削力数学模型并进行量化分析,得出切削速度对切削力Fx的影响要比对切削力Fy和Fz大、背吃刀量对切削力Fz的影响要比对切削力Fx和Fy大的结论,并以材料去除率和切削力为评价指标对工艺参数进行优化,得到用于生产加工的最佳工艺参数组合。 相似文献
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《Measurement》2016
Residual stresses are usually imposed on a machined component due to thermal and mechanical loading. Tensile residual stresses are detrimental as it could shorten the fatigue life of the component; meanwhile, compressive residual stresses are beneficial as it could prolong the fatigue life. Thermal and mechanical loading significantly affect the behavior of residual stress. Therefore, this research focused on the effects of lubricant and milling mode during end milling of S50C medium carbon steel. Numerical factors, namely, spindle speed, feed rate and depth of cut and categorical factors, namely, lubrication and milling mode is optimized using D-optimal experimentation. Mathematical model is developed for the prediction of residual stress, cutting force and surface roughness based on response surface methodology (RSM). Results show that minimum residual stress and cutting force can be achieved during up milling, by adopting the MQL-SiO2 nanolubrication system. Meanwhile, during down milling minimum residual stress and cutting force can be achieved with flood cutting. Moreover, minimum surface roughness can be attained during flood cutting in both up and down milling. The response surface plots indicate that the effect of spindle speed and feed rate is less significant at low depth of cut but this effect significantly increases the residual stress, cutting force and surface roughness as the depth of cut increases. 相似文献
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研究了不同切削方向,不同铣削参数对单板层积材铣削过程中切削力的影响规律,从而为实际加工提供指导。试验结果表明,在一定铣削参数下,单板层积材纵向铣削和横向铣削时,纵向铣削的主切削力比横向铣削的主切削力大;切削速度对主切削力影响不是很明显;主切削力都随切削深度增大而增大,并得出了各自的主切削力与切削深度的线性回归方程,为实际切削加工提供了可供参考的经验公式。 相似文献
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《Measurement》2016
Milling is the most feasible machining operation for producing slots and keyways with a well defined and high quality surface. Milling of composite materials is a complex task owing to its heterogeneity and the associated problems such as surface delamination, fiber pullout, burning, fuzzing and surface roughness. The machining process is dependent on the material characteristics and the cutting parameters. An attempt is made in this work to investigate the influencing cutting parameters affecting milling of composite laminates. Carbon and glass fibers were used to fabricate laminates for experimentations. The milling operation was performed with different feed rates, cutting velocity and speed. Numerically controlled vertical machining canter was used to mill slots on the laminates with different cutting speed and feed combinations. A milling tool dynamo meter was used to record the three orthogonal components of the machining force. From the experimental investigations, it was noticed that the machining force increases with increase in speed. For the same feed rate the machining force of GFRP laminates was observed to be very minimal, when compared to machining force of CFRP laminates. It is proposed to perform milling operation with lower feed rate at higher speeds for optimal milling operation. 相似文献
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KDP晶体是一种常用的非线性光学材料,广泛应用于激光变频、电光调试和光快速开关等高技术领域。文中通过实验研究了KDP晶体超精密切削加工的切削力特性,分析了切削深度、进给量对切削力的影响,并对KDP晶体和铝合金的切削力进行了比较。研究结果表明,立轴平面铣削KDP晶体的切削力Fz、Fy随着切削深度和进给量的增加而增加,但增加的速度远小于铝合金的切削力Fz、Fy增加速度。实验证明了在生产实际中加工KDP晶体时,在不影响加工表面质量的前提下,可以适当加大切削深度和进给量,从而提高切削效率。 相似文献
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选用涂层硬质合金刀具对300M超高强度钢进行高速铣削试验,通过单因素试验和多因素正交试验法,得出铣削参数(主轴转速、每齿进给量、铣削深度)对切削力及表面粗糙度的影响规律及主次关系。对正交试验结果做最小二乘法分析,建立切削力及表面粗糙度与铣削参数之间的经验模型;对经验模型的回归方程及系数做显著性检验,并对其进行参数优化,得出铣削参数的最优组合。结果表明:主轴转速和铣削深度对切削力的作用较大,而每齿进给量对其影响相对较弱;每齿进给量对表面粗糙度作用最强,铣削深度次之,主轴转速对其作用最弱。 相似文献
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《机械工程学报(英文版)》2017,(1)
Titanium alloy is a kind of typical hard-to-cut material due to its low thermal conductivity and high strength at elevated temperatures, this contributes to the fast tool wear in the milling of titanium alloys. The influence of cutting conditions on tool wear has been focused on the turning process, and their influence on tool wear in milling process as well as the influence of tool wear on cutting force coefficients has not been investigated comprehensively. To fully understand the tool wear behavior in milling process with inserts, the influence of cutting parameters on tool wear in the milling of titanium alloys Ti6Al4 V by using indexable cutters is investigated. The tool wear rate and trends under different feed per tooth, cutting speed, axial depth of cut and radial depth of cut are analyzed. The results show that the feed rate per tooth and the radial depth of cut have a large influence on tool wear in milling Ti6Al4 V with coated insert. To reduce tool wear, cutting parameters for coated inserts under experimental cutting conditions are set as: feed rate per tooth less than 0.07 mm, radial depth of cut less than 1.0 mm, and cutting speed sets between 60 and 150 m/min. Investigation on the relationship between tool wear and cutting force coefficients shows that tangential edge constant increases with tool wear and cutter edge chipping can lead to a great variety of tangential cutting force coefficient. The proposed research provides the basic data for evaluating the machinability of milling Ti6Al4 V alloy with coated inserts, and the recommend cutting parameters can be immediately applied in practical production. 相似文献
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Titanium alloy is a kind of typical hard-to-cut material due to its low thermal conductivity and high strength at elevated temperatures, this contributes to the fast tool wear in the milling of titanium alloys. The influence of cutting conditions on tool wear has been focused on the turning process, and their influence on tool wear in milling process as well as the influence of tool wear on cutting force coefficients has not been investigated comprehensively. To fully understand the tool wear behavior in milling process with inserts, the influence of cutting parameters on tool wear in the milling of titanium alloys Ti6Al4V by using indexable cutters is investigated. The tool wear rate and trends under different feed per tooth, cutting speed, axial depth of cut and radial depth of cut are analyzed. The results show that the feed rate per tooth and the radial depth of cut have a large influence on tool wear in milling Ti6Al4V with coated insert. To reduce tool wear, cutting parameters for coated inserts under experimental cutting conditions are set as: feed rate per tooth less than 0.07 mm, radial depth of cut less than 1.0 mm, and cutting speed sets between 60 and 150 m/min. Investigation on the relationship between tool wear and cutting force coefficients shows that tangential edge constant increases with tool wear and cutter edge chipping can lead to a great variety of tangential cutting force coefficient. The proposed research provides the basic data for evaluating the machinability of milling Ti6Al4V alloy with coated inserts, and the recommend cutting parameters can be immediately applied in practical production. 相似文献