Characteristics of machined and formed external threads in titanium alloy
Characteristics of machined and formed external threads in titanium alloy
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DOI：
10.1007/s00170-015-6858-z
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发表时间：
2015-07-01
影响因子：
3.4
通讯作者：
Brandao, Lincoln Cardoso
中科院分区：
文献类型：
--
作者：
Maciel, Diogo Tubertini;Moni Ribeiro Filho, Sergio Luiz;Brandao, Lincoln Cardoso
易于组装的机械部件，特别是那些使用螺纹加工的机械部件，对于工业产品来说是必不可少的。从飞机到医疗行业，都采用使用螺纹部件的固定装置。例如，在生物医学领域中，通过攻丝进行的机械固定具有促进整形外科和牙科组件初始插入并确保良好抓握的功能。本工作的目的是研究使用三辊成形头在 Ti-6Al-4V 钛合金中成形外螺纹的工艺。 Ti-6Al-4v钛合金因其优异的机械性能而被广泛用作飞机和机械部件材料。采用统计方法 (DoE) 来识别和评估因素（初始直径、成形速度和测量位置）对响应的影响；硬度、填充率和螺纹牙形。结果表明，线程的特性取决于线程处理的因素。成形和加工速度是影响工艺的主要参数。螺纹顶部的硬度低于底部和中部区域的硬度。最后，螺纹达到了所需的轮廓，不仅对于成型螺纹而且对于机加工螺纹都具有出色的填充率。
Mechanical components with easy assembly, especially those that use the threading process, are essential for industrial products. Fixtures using threaded components are employed from the aircraft to medical industry. The mechanical fixings by tapping, for example, in the biomedical field have the function of facilitating the initial insertion of orthopedic and dental components and of ensuring excellent grip. The aim of this work was to study the external thread by the forming process in Ti-6Al-4V titanium alloy using a forming head with three rollers. Ti-6Al-4v titanium alloy was used due to its excellent mechanical properties and wide application as an aircraft and mechanical component material. A statistical methodology (DoE) was performed to identify and evaluate the effect of the factors (initial diameter, forming speed, and measuring position) on the responses; hardness, fill rate, and thread profile. The results showed that the characteristics of the threads depend on the factors of the threading processes. The forming and machining speeds were the main parameters affecting the process. The hardness in the thread's crest was lower than at the base and the middle regions. Finally, the threads reached a desired profile with an excellent fill rate not only for formed threads but also for machined threads.