A novel method for investigating drilling machinability of titanium alloys using velocity force maps
A novel method for investigating drilling machinability of titanium alloys using velocity force maps
复制标题
使用速度力图研究钛合金钻孔加工性的新方法
DOI：
10.1016/j.aime.2021.100043
复制
发表时间：
2021
期刊：
影响因子：
--
通讯作者：
M. Jackson
中科院分区：
文献类型：
--
作者：
Alex Graves;S. Norgren;P. Crawforth;M. Jackson
在用亚稳β钛合金制造关键航空航天部件的过程中，过度的工具磨损和加工成本可能是重大障碍。尽管工具针对α+β合金Ti-6Al-4V（Ti-64）钻孔进行了高度优化，但由于设计和优化新钻头所需的成本密集型工艺，因此没有足够的信息来有效改进用于更高强度合金的工具。为了降低这种成本，提出了一种新的方法，该方法能够快速比较不同合金（Ti-64; Ti-6Al-2Sn-4 Zr-6 Mo（Ti-6246）;和Ti-5Al-5 Mo-5V-3Cr（Ti-5553））之间的可加工性，以使用工业相关的钻孔参数快速评估特定工具特性的性能。通过开发不同切削进给和速度下涂层TiAlN和未涂层WC/Co刀具的3D刀具速度力图（VFM），可以快速评估和比较选定力下的微观结构损伤。显微组织损伤深度已被证明随着合金强度的增加而减小，即使在工件和工具之间的推力相同的情况下也是如此~1600 N。此外，当使用未涂覆的工具时，测量到较低的损坏深度。刀具涂层的可加工性评价及其与力、扭矩和材料性能的相互作用表明，TiAlN涂层刀具在每种合金的情况下响应不同，显示出显著不同的扭矩分布，从而表明不同的最佳切削速度和进给。磨料和粘附磨损机制被确定在涂层工具，而在未涂层工具的磨损大多数是磨料。
During the manufacture of critical aerospace components from metastable β titanium alloys, excessive tool wear and machining cost can be significant obstacles. Although tools are highly optimised for drilling the α+β alloy Ti–6Al–4V (Ti-64), insufficient information is available to efficiently improve tools for use on higher strength alloys due to the cost intensive processes required to design and optimise new drills. To reduce this cost, a novel method is presented which enables rapid comparisons of machinability between different alloys, (Ti-64; Ti–6Al–2Sn–4Zr–6Mo (Ti-6246); and Ti–5Al–5Mo–5V–3Cr (Ti-5553)), to quickly assess the performance of specific tool characteristics using industrially relevant drilling parameters. Rapid assessment and comparison of microstructural damage at selected forces was made possible through the development of 3D tool velocity force maps (VFM) for coated TiAlN and uncoated WC/Co tools at different cutting feeds and speeds. Microstructural damage depth has been shown to decrease with increasing alloy strength even for cases where the thrust force between the work piece and the tool was the same ~1600 N. In addition, a lower damage depth was measured when using uncoated tools. The machinability evaluation of tool coating and its interaction with force, torque, and material properties showed that TiAlN coated tools responded differently in the case of each alloy, displaying significantly different torque profiles, thus indicating different optimum cutting speeds and feeds. Abrasive and adhesive wear mechanisms were identified in the coated tools, while the majority of wear in uncoated tools was abrasive.
影响因子：
6
作者：
Fernandez, Daniel Suarez;Wynne, B. P.;Jackson, M.
通讯作者：
Jackson, M.