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Study on forming processing of the artificial joint using a vanadium free beta type titanium alloy

无钒β型钛合金人工关节成形加工研究

基本信息

批准号：
15560105
负责人：
SHINTANI Kazuhiro
金额：
$ 2.24万
依托单位：
Kanazawa Institute of Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2003
资助国家：
日本
起止时间：
2003 至 2004
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-15560105/
关键词：
implant binderless cBN tool high-speed cutting β bio-titanium alloy surgical implant optimum cutting speed バインダーレスcBN工具高速加工医療用チタン合金

项目摘要

Although surgical implants as a stem of an artificial hip joint are standardized in several specifications, their variations in size and form are not enough to fit every patient. Therefore in order to make them fit to any patients, it is required that these implants can be manufactured rapidly by machining with application of the patient's medical image data obtained by MRI or X-ray CT. Also titanium alloys without containing vanadium are recently going to applied for surgical implant material in place of conventional type of titanium alloy such as Ti-6A1-4V system, in order to eliminate a toxicological effect of vanadium for human body. In 2002 year, these materials were standardized as titanium alloys for surgical implant in the Japanese Industrial Standard. On the other hand, the temperature rise in the cutting edge is significant in cutting process of titanium alloys including above mentioned vanadium-free alloys, and it promotes strongly the adhesion between tool and work material … More s in general, resulting in tool failure within relatively short duration. So, in order to improve processing efficiency in cutting of titanium alloys, a binderless cBN tool was proposed to apply in cutting of titanium alloys. It was confirmed that a binderless cBN tool exhibited low flank wear and kept sharp cutting edge. In this study, by accumulating the picture photoed using 3D-CT equipment about a patient's affected part form, creation of the CAD data of the in plant form which fits grasp and affected part form in the 3-dimensional form of the affected part was enabled. Moreover, the tool path using CAM was created and the manufacture system of the stem fit for each patient was completed. Improvement of processing efficiency was tried in machining of β type bio-titanium alloys. Milling tests were conducted with a radius end mill tool whose tip was made of binderless cBN material. It is clarified that optimum cutting speed to be the range of 3.0 m/s to 5.0 m/s. Finally about the new form proposal in consideration of the weight saving of stem form using beta type alloy, it did not result in object processing. Less

虽然外科植入物作为人工髋关节的主干在几种规格上是标准化的，但它们在大小和形状上的变化并不足以适合每个患者。因此，为了使它们适合任何患者，需要这些植入物可以通过应用MRI或x射线CT获得的患者医学图像数据通过加工快速制造。此外，为了消除钒对人体的毒理学影响，不含钒的钛合金最近正被应用于外科植入材料，以取代Ti-6A1-4V系等传统类型的钛合金。2002年，这些材料在日本工业标准中被标准化为外科植入用钛合金。另一方面，在钛合金（包括上述无钒合金）的切削过程中，切削刃的温升非常明显，它强烈地促进了刀具与工件材料之间的粘附，导致刀具在相对较短的时间内失效。因此，为了提高钛合金切削加工效率，提出了一种无粘结剂cBN刀具用于钛合金切削加工。结果表明，无粘结剂cBN刀具刃口磨损小，刃口锋利。在本研究中，通过积累使用3D-CT设备拍摄的患者患部形态的图片，可以在患部的三维形态中创建适合抓握和患部形态的植物形态CAD数据。在此基础上，利用CAM建立了刀具轨迹，完成了每位患者的刀杆配合制造系统。在β型生物钛合金的加工中，尝试提高加工效率。以无粘结剂cBN材料为刃口的半径立铣刀进行铣削试验。明确了最佳切削速度为3.0 ~ 5.0 m/s。最后提出了采用β型合金减轻杆件重量的新造型方案，避免了对杆件进行实物加工。少