Basic study on 3D micro texture forming for implants -Diamond cutting and roll forming of micro texture on Titanium alloy-

微表面拓扑是众所周知的，在经验上对生物功能产生影响。因此，商业钛植入物被处理为覆盖在不同种类的拓扑表面上，因此被称为微纹理。这里，两个制备微纹理的程序被讨论;直接切割钛合金与金刚石工具，并形成多卷常规纹理。前体已被用于优化某些表面功能的微纹理设计，以及后来的目标是在钛植入物上形成高强度的微纹理。使用钻石工具的飞行切割和成形过程被讨论直接切割钛合金的钛合金。钛很容易在粗糙面的钻石工具上粘贴，以确定地面几何或生成burr，在地面上。“燃烧器产生机制的模型是根据命令来决定燃烧器的。”根据模型，当未切割的芯片厚度是很大的时候，张力力的作用是在沟槽的肩膀上制造泡沫。因此， burr可以通过去除未切割芯片厚度而降低，由于不超过1μm。Furthermore，在钛上形成卷也被讨论用于应用于3D表面的经济微纹理。一个灵活的工具持有者能够跟随一个复杂的几何学已经提出。微型滚动器在一个固定的压力下支撑着一个柔性工具持有表格的多个凹槽。在这里，估计使用中间钨碳化物微型滚筒进行生长的特征，其中外径为0.4毫米，顶部角度为60 °。在一个滚筒的顶端边缘上的清晰度是多微生长的主导地位。使用钻石研磨轮的最佳研磨条件后，1-2微米的精确度得到了改善。作为一个结果，在一个3D表面上进行少量的微生长是可能的，使用一个开发的工具。

The micro surface topography is known empirically to affect on biological functions. Therefore, commercial Titanium implants are treated to cover on the surface with various kinds of topography, so called as micro texture.Here, two procedures of forming micro texture are discussed ; direct groove cutting of Titanium alloy with diamond tools, and multi roll forming for regular grooves. The former is used to optimize the micro texture design for some surface functions, and the later aims to forming the above-mentioned optimal micro texture on Titanium implants for individual body.Fly cutting and shaping processes using diamond tools are discussed on direct cutting of Titanium alloy.Titanium is easy to paste on the rake face of diamond tools to deteriorate groove geometry or generating burr, on groove shoulders. The model of the burr generating mechanism on groove shoulders is proposed in order to decrease the burr. According to the model, tensile force works on groove shoulders to make burr when uncut chip thickness is large. Therefore, burr can be depressed by decreasing uncut chip thickness, for instance less than 1μm.Furthermore, roll forming on Titanium is also discussed for applying to economical micro texturing on 3D surface. A flexible tool holder capable to follow an arbitrary geometry is proposed. Micro rollers held on the flexible tool holder form multi grooves at a constant pressure. Here, grooving characteristics are estimated using sintered tungsten carbide micro rollers, which are φ0.4mm in OD, 60゜ in top angle. The sharpness on the top edge of a roller is dominant for multi micro grooving. The sharpness of 1-2 μm accuracy is achieved after optimal grinding conditions using a diamond grinding wheel. As a result, a few micron grooving on a 3D surface is possible using a developed tool.