A study of the machining of surgical implant material

外科植入材料的加工研究

• 批准号: 13650138
• 负责人: SHINTANI Kazuhiro
• 金额: $ 2.3万
• 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: 2001
• 资助国家: 日本
• 起止时间: 2001 至 2002
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-13650138/
• 关键词: implant; binder-less cBN tool; high-speed cutting; bio-titanium alloy

Recently, titanium alloys without containing vanadium are going to applied for material of surgical implant in place of conventional type of titanium alloy such as Ti-6Al-4V system, in order to eliminate a toxicological effect of vanadium for human body. In general, the temperature rise in the cutting edge is significant in cutting process of titanium alloys including above mentioned vanadium-free alloys, promoted strongly the adhesion between tool and work materials, resulting in tool failure within relatively short duration. 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. To make them fit to any patients, it is required that these implants can be manufactured easily by machining with application of the patient's medical image data obtained by MRI or X-ray CT. Improvement of processing efficiency was tried in machining of above described bio-titanium alloy … More s. A binder-less PcBN tool which is prepared through the direct conversion sintering of hBN under both high pressure and temperature, exhibits an improved high temperature durability. The tool was applied for machining of the conventional Ti-6Al-4V alloy and two types of bio-titanium alloys, then cutting performance are evaluated. The wear resistance of a binder-less PcBN tool for machining Ti-6Al-4V alloy was superior to those of the tools made of cemented carbide, PcBN and polycrystalline diamond with Co-based binder. The performance of the binder-less PcBN tool for Ti-6Al-2Nb-1Ta alloy was almost equivalent to that for the Ti-6Al-4V alloy in flank wear characteristics. On the other hand, for machining of the Ti-15Mo-5Zr-3Al alloy, the cutting edge failed in earlier stage due to its higher strength and toughness than Ti-6Al-4V alloy. The reaction between PcBN and titanium alloy under a high thermal contact produced the diffusion layer with certain thickness which consisted of Ti, B and Al. It was clarified that the binder-less PcBN tool could improve tool life in high-speed milling of the Ti-15Mo-5Zr-3Al alloy. Less

近年来，为了消除钒对人体的毒性作用，不含钒的钛合金将代替传统类型的钛合金如Ti-6Al-4V系统而被应用于外科植入物的材料。一般来说，在钛合金切削过程中，包括上述无钒合金在内的切削刃的温度升高是显著的，强烈地促进了刀具与工件材料之间的粘附，导致刀具在相对短的时间内失效。虽然作为人工髋关节柄的外科植入物在几个规格中被标准化，但它们在尺寸和形式上的变化不足以适合每个患者。为了使它们适合于任何患者，要求这些植入物可以通过应用通过MRI或X射线CT获得的患者的医学图像数据通过机械加工容易地制造。在上述生物钛合金的机械加工中尝试提高加工效率 ...更多信息 S.通过在高压和高温下直接转化烧结hBN制备的无粘结剂PcBN工具表现出改进的高温耐久性。应用该刀具对常规Ti-6Al-4V合金和两种生物钛合金进行了加工，并评价了其切削性能。无粘结剂PcBN刀具加工Ti-6Al-4V合金的耐磨性上级硬质合金刀具、PcBN刀具和钴基粘结剂聚晶金刚石刀具。Ti-6Al-2Nb-1 Ta合金的无粘结剂PcBN刀具的后刀面磨损性能与Ti-6Al-4V合金相当。另一方面，对于Ti-15 Mo-5 Zr-3Al合金的切削，由于其比Ti-6Al-4V合金更高的强度和韧性，切削刃在早期失效。PcBN与钛合金在高温接触条件下发生反应，生成一定厚度的Ti、B和Al扩散层，表明无粘结剂PcBN刀具在高速铣削Ti-15 Mo-5 Zr-3 Al合金时可提高刀具寿命。少

项目成果

加藤秀治, 廣崎憲一, 新谷一博, 松尾和哉, 戸田直大: "バインダレスcBN工具を用いた医療用チタニウム合金の高能率ボールエンドミル加工に関する研究"2002年度精密工学会秋季大会学術講演会講演論文集. 199 (2002)

Hideharu Kato、Kenichi Hirosaki、Kazuhiro Shintani、Kazuya Matsuo、Naohiro Toda：“使用无粘结剂 cBN 刀具对医用钛合金进行高效球头铣削的研究”在 2002 年日本精密工程学会秋季会议学术会议集上的演讲论文 199。 (2002)

K.Hirosaki, K.Shintani, H Kato, S.Seiichi, S.MSHIMURA: "Fundamental Machining Characteristic of Bio-Titanium Alloys"Proceedings of the 6^<th> Int. conference on Progress of Machining Technology. (掲載決定).

K.Hirosaki、K.Shintani、H Kato、S.Seiichi、S.MSHIMURA：“生物钛合金的基本加工特性”第 6 届国际加工技术进展会议论文集（决定出版） ）。

K. Hirosaki, K. Shintani, H. Kato, S. Seiichi and S. NISHIMURA: "Fundamental Machining Characteristic of Bio-Titanium Alloys"Proceedings of the 6th Int. conference on Progress of Machining Technology, Beijing, China. Sep.. 10-14 (2002)

K. Hirosaki、K. Shintani、H. Kato、S. Seiichi 和 S. NISHIMURA：“生物钛合金的基本加工特性”第六届国际会议论文集。

K.Hirosaki, K.Shintani, H.Kato, S.Seiichi, S.NISHIMURA: "Fundamental Machining Characteristic of Bio-Titanium Alloys"Proceedings of the 6^<th> Int. conference on Progress of Machining Technology. 64-69 (2002)

K.Hirosaki、K.Shintani、H.Kato、S.Seiichi、S.NISHIMURA：“生物钛合金的基本加工特性”第 6 届国际会议论文集。

K.Hirosaki, K.Shintani, H.Kato, F.Asakura, K.Matsuo: "High Speed Machining of Bio-Titanium Alloy with a Binderless cBN Tool"Proceedings of the International Conference on Leading Edge Manufacturing in 21^<st> Century. (掲載決定). (2003)

K.Hirosaki、K.Shintani、H.Kato、F.Asakura、K.Matsuo：《使用无粘结剂 cBN 工具高速加工生物钛合金》21 年前沿制造国际会议论文集^< st>世纪。（出版决定）（2003）。