Ductile Regime Grinding of Hard and Brittle Materials Based on Optimum Design of Cutting Edge Truncation

基于切削刃截断优化设计的硬脆材料延性磨削

• 批准号: 12650105
• 负责人: TAMAKI Jun'ichi
• 金额: $ 1.22万
• 依托单位: Kitami 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: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-12650105/
• 关键词: Optical Glass; Ductile Regime Grinding; Metal-Bonded Grinding Wheel; Grinding Simulation; Cutting Edge Truncation; Shape of Abrasive Cutting Edge; Electro-Contact Discharge Dressing; Envelope Generation; 延性モード研削; ダイヤモンド砥粒; 走査型レーザ顕微鏡; 精密ツルーイング /

As a means to realize ductile regime grinding of an optical glass, a truncation method in which diamond cutting edges are truncated to be aligned on the grinding wheel surface is focused on in order to optimize the truncation conditions. The results are summarized as follows.1. Three-dimensional shape of diamond grain cutting edges was measured using a scanning laser microscope and it is found that the shape of cutting edge can be represented by triangular cone and the negative rake angle is 70 degrees in average.2. Boron-silicate glass was ground by a single point diamond abrasive grain on an ultra-precision face lathe. The cutting edge characteristics of SD46 grains were measured in advance using the above method. It is found that the critical depth of cut dc at which the material removal process transits from ductile regime to brittle regime is about 100 nanometers at the negative rake angle of 70 degrees.3. Computer-aided simulation of surface plunge grinding was carried out and it is found that a finished surface roughness of nanometer order is easy to be generated by the truncation of coarse-grained grinding wheel, but a fine-grained grinding wheel is prerequisite in order to realize ductile regime grinding in which the maximum grain depth of cut must be kept less than the critical depth dc.4. A truing technique in which the grinding wheel axial profile is given by a straight line enveloped by circular arcs is proposed in order to realize the wheel axial profile of sub-micron flatness. The effectiveness of this technique was confirmed experimentally by electro-contact discharge truing of a metal-bonded diamond wheel.

作为实现光学玻璃延性区域磨削的一种手段，重点研究了截断金刚石刃口使其对齐在砂轮表面的截断方法，以优化截断条件。研究结果总结如下：1.研究成果。利用扫描激光显微镜测量了金刚石颗粒切削刃的三维形状，发现切削刃的形状可以用三角形锥体来表示，负前倾角平均为70度。在超精密平面车床上用单点金刚石磨粒研磨了硼硅酸盐玻璃。用该方法预先测量了SD46晶粒的刃口特性。研究发现，在负前倾角70°时，材料去除过程由延性区向脆性区转变的临界切削区深度约为100纳米。对平面插入式磨削进行了计算机仿真，发现粗晶砂轮的截断很容易产生纳米量级的表面粗糙度，而细晶砂轮是实现延性状态磨削的前提，其最大磨粒深度必须保持在临界深度dc以下。为了实现亚微米平面度的砂轮轴向轮廓，提出了一种用圆弧包络直线给出砂轮轴向轮廓的修整技术。通过对金属结合剂金刚石砂轮的电接触放电整形实验，验证了该技术的有效性。

项目成果

T. Mahmohd, J. Tamaki and J. Yan: "Three-Dimensional Shape of Diamond Abrasive Grains Measured by a Scanning Laser Microscope"Key Engineering Materials. 238-239. 131-136 (2003)

T. Mahmohd、J. Tamaki 和 J. Yan：“用扫描激光显微镜测量金刚石磨粒的三维形状”关键工程材料。

謝晋, 久保明彦, 田牧純一, 閻紀旺: "包絡線創成法による平面研削用メタルボンドホイールの精密ツルーイング"砥粒加工学会誌. 46-10. 521-526 (2002)

Jin Xie，Akihiko Kubo，Junichi Tamaki，Kiwang Yan：“使用包络生成方法进行表面磨削的金属结合剂砂轮的精密修整”磨料加工学会杂志 46-10 (2002)。

T.Mahmoud, J.Tamaki, J.Yan: "Three-Dimensional Shape of Diamond Abrasive Grains Measured by a Scanning Laser Microscope"Key Engineering Materials. 238-239. 131-136 (2003)

T.Mahmoud、J.Tamaki、J.Yan：“用扫描激光显微镜测量金刚石磨粒的三维形状”关键工程材料。

J. Xie, A. Kubo, J. Tamaki and J. Yan: "Precision Truing of a Metal-Bonded Diamond Grinding Wheel by Means of an Envelope Generation Method"J. Japan Society for Abrasive Technology. 46-10. 521-526 (2002)

J. Xie，A. Kubo，J. Tamaki和J. Yan：“利用包络生成法精密修整金属结合剂金刚石砂轮”J.