金刚石涂层刀具铣削高硅铝合金的铣削性能试验研究

针对新型工程材料高硅铝合金的切削性能进行研究,采用金刚石涂层刀具对含硅量50%的高硅铝合金CE11进行铣削加工性能试验,通过单因素分析法和正交试验分析法得到金刚石涂层刀具铣削CE11的最佳铣削参数,并对其进行优化。     

高硅铝合金的金刚石涂层刀具铣削损伤机理研究

高硅铝合金由于硅含量很高,故切削加工性较差,切削刀具极易磨损且已加工表面存在大量缺陷.为进一步研究材料加工损伤,采用化学气相沉积法制备了金刚石涂层铣刀,开展70％Si/Al(70％指质量分数)合金材料铣削试验.试验研究了铣削力、刀具磨损及加工损伤机理,并与常用TiN涂层铣刀进行了对比.结果 表明:铣削过程中由于初晶硅硬...     

金刚石涂层铣刀铣削高硅铝合金CE11的刀具磨损分析

在国内外对高硅铝合金切削摩擦磨损特性的研究基础上,以正交试验法为基础,利用有限元仿真软件DEFORM-3D对金刚石涂层铣刀铣削高硅铝合金CE11过程进行虚拟仿真分析,并研究铣削用量的改变对刀具磨损的影响规律。基于仿真试验结果,对金刚石涂层刀具铣削高硅铝合金的铣刀磨损量试验数据进行极差分析,优选出最小磨损量的最佳切削用量方案,并通过试验验证了仿真结果的正确性。     

TiAlN涂层铣刀铣削CE11高硅铝合金的刀具磨损分析

在分析高硅铝合金切削摩擦磨损特性的国内外研究现状基础上,以正交试验法为基础,利用DEFORM 3D有限元仿真软件对TiAlN涂层铣刀铣削CE11高硅铝合金的铣削过程进行虚拟仿真分析,研究铣削用量的改变对刀具磨损的影响规律。基于仿真试验结果,对TiAlN涂层刀具铣削高硅铝合金的铣刀磨损量试验数据进行极差分析,优选出最小磨损量的最佳切削用量方案,并通过试验验证仿真结果的正确性。     

金刚石薄膜涂层刀具切削性能与磨损过程的研究

金刚石薄膜具有高硬度、低摩擦系数、高耐磨性和高导热性能。金刚石薄膜涂层刀具高速干切削硅铝合金可提高生产率。通过金刚石薄膜涂层刀具的切削试验和考察其磨损过程，表明了金刚石薄膜涂层刀具的使用寿命明显高于未涂层的硬质合金刀具，金刚石薄膜涂层刀具的磨损是由薄膜的显微断裂而逐渐脱落的过程。     

金刚石涂层刀具的切削性能

用扫描电镜等方式检测金刚石镀膜的性能，并与天然金刚石的相关参数进行比较，阐明了金刚石涂层刀具的优异性能。通过对高硅铝合金零件的加工．表明金刚石涂层刀具在有色金属和非金属材料的切削加工中具有良好的使用前景。     

超细晶粒金刚石涂层刀具高速铣削石墨的切削性能研究

选用超细晶粒和粗晶粒金刚石涂层的双刃整体硬质合金平头立铣刀,在相同切削参数下进行石墨的高速铣削加工试验.试验结果表明:超细晶粒金刚石涂层刀具具有良好的表面涂层性能,在切削过程中刀刃磨损均匀缓慢,刀具的使用寿命和工件的加工表面质量都优于粗晶粒金刚石涂层刀具,适合石墨等硬脆材料的高速切削加工.     

CVD金刚石涂层刀具切削性能的试验研究

金刚石薄膜具有高硬度、低摩擦系数、高耐磨性和高导热性能。文中通过用金刚石薄膜涂层刀具对含硅量不同的硅铝合金进行干切削试验,探讨其切削性能。     

金刚石涂层刀具在干式切削中的性能分析

介绍了干式切削加工技术的优点及发展趋势,分析了干式切削刀具技术及金刚石涂层刀具的性能特点.通过铝硅合金的干式切削试验,研究了金刚石涂层刀具的干式切削加工特性.经试验表明,金刚石涂层刀具正常磨损阶段,工件表面粗糙度非常稳定;刀具损坏以涂层脱落为主,刀具寿命取决于涂层与机体的结合强度;进给量对工件表面粗糙度影响最大,如果进给量合适,可以保证金刚石涂层刀具在高速下具有良好的干式切削性能.     

金刚石薄膜涂层刀具干切削性能的试验研究

通过用金刚石薄膜涂层刀具对含硅量不同的硅铝合金进行干切削试验 ,探讨其切削性能。     

铜合金的高速铣削加工的研究

通过对铜合金的高速铣削加工实验,对铜合金的高速铣削加工时的切削力、金属去除率、表面质量、切削热、刀具材料及刀具耐用度进行分析和研究.从而得出,硬质合金和人造金钢石非常适合于对铜合金的高速铣削加工,而且用高速铣削加工出的铜合金零件的表面质量和加工精度是非常理想的,往往毋需再进行进一步的精加工.     

Approach for Polishing Diamond Coated Complicated Cutting Tool: Abrasive Flow Machining(AFM)

Lower surface roughness and sharper cutting edge are beneficial for improving the machining quality of the cut?ting tool, while coatings often deteriorate them. Focusing on the diamond coated WC?Co milling cutter, the abrasive flow machining(AFM) is selected for reducing the surface roughness and sharpening the cutting edge. Comparative cutting tests are conducted on di erent types of coated cutters before and after AFM, as well as uncoated WC?Co one, demonstrating that the boron?doped microcrystalline and undoped fine?grained composite diamond coated cutter after the AFM(AFM?BDM?UFGCD) is a good choice for the finish milling of the 6063 Al alloy in the present case, because it shows favorable machining quality close to the uncoated one, but much prolonged tool lifetime. Besides, compared with the micro?sized diamond films, it is much more convenient and e cient to finish the BDM?UFGCD coated cutter covered by nano?sized diamond grains, and resharpen its cutting edge by the AFM, owing to the lower initial surface roughness and hardness. Moreover, the boron incorporation and micro?sized grains in the underly?ing layer can enhance the film?substrate adhesion, avoid the rapid film removal in the machining process, and thus maximize the tool life(1040 m, four times more than the uncoated one). In general, the AFM is firstly proposed and discussed for post?processing the diamond coated complicated cutting tools, which is proved to be feasible for improving the cutting performance     

金刚石涂层刀具高速铣削石墨的磨损形态与破损机理

通过对比切削试验,分析了金刚石涂层刀具高速铣削石墨时的磨损形态与过程,论述了金刚石涂层刀具的破损原因与失效机理,为金刚石涂层刀具在高速切削领域的推广应用提供了实用的依据。     

离子镀TiCN和TiN工具涂层的微结构与切削性能

采用电弧离子镀技术在硬质合金铣刀和钻头上镀覆了TiCN和TiN涂层,研究并比较了两种涂层的微结构与力学性能,以及涂层铣刀的高速切削性能和涂层钻头的切削性能。结果表明,TiCN和TiN涂层同为单相的Na-Cl型结构,并都呈现(111)择优取向的柱状晶,TiCN涂层的硬度为34.6GPa,远高于TiN涂层25.1GPa的硬度。在高速铣削条件下,TiCN涂层铣刀的后刀面磨损速率仅为TiN涂层铣刀的约三分之一。TiCN涂层钻头在钻孔数为TiN涂层钻头两倍时的磨损量仍低于TiN涂层钻头。TiCN涂层的高硬度及在较高切削线速度下的减摩作用是这种涂层刀具寿命提高的重要原因。     

含Si涂层刀具铣削复合铝2024的性能研究

选用含Si涂层、TiAlN涂层和未涂层的整体硬质合金四刃平底立铣刀,在相同的切削参数下进行复合铝2024的铣削加工试验。试验结果表明:含Si涂层铣刀具有良好的耐磨性,在切削过程中刀刃磨损均匀缓慢,刀具使用寿命长,加工表面光洁度好,是铣削复合铝2024的理想刀具。     

Effects of Cutting Parameters on Tool Insert Wear in End Milling of Titanium Alloy Ti6A14V

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.     

Effects of cutting parameters on tool insert wear in end milling of titanium alloy Ti6Al4V

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.     

晶粒细化对金刚石涂层刀具切削性能的影响

金刚石涂层具有高硬度、低摩擦系数、高耐磨性和高导热性能。本文着重介绍了金刚石涂层刀具的发展动向及现状,并通过金刚石涂层刀具的切削试验表明了金刚石涂层刀具的使用寿命明显高于未涂层的硬质合金刀具,采用金刚石涂层刀具进行切削可以获得更高的表面加工质量和生产率。