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首页> 外文期刊>Advances in materials science and engineering >Investigations on the Wear Rate of Sintering Diamond Core Bit during the Hole Drilling Process of Al2O3 Bulletproof Ceramics
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Investigations on the Wear Rate of Sintering Diamond Core Bit during the Hole Drilling Process of Al2O3 Bulletproof Ceramics

机译：Al2O3防弹陶瓷钻孔时金刚石烧结钻头磨损率的研究。

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摘要

Bulletproof ceramics are usually hard and brittle with high elastic modulus, high compressive strength, and low tensile strength. While machining bulletproof ceramics, severe tool wear makes it difficult to obtain desired machining quality and efficiency, especially in hole drilling. In this work, an intensive experimental study on the overall wear rate of the sintering diamond thin-wall core bit during the hole drilling of Al2O3 bulletproof ceramics (99 wt.%) has been carried out. The quality loss of the bit after each hole drilled was selected for representing the overall wear rate of the bit. Based on experimental data, the influences of the main bit performance and machining process parameters on the overall wear rate of the bit have been analyzed. According to the results discussed, under the test conditions, finer diamond grit, higher diamond concentration, lower number of water gaps, thinner wall thickness, or lower bit load all can decrease the wear rate of the bit. However, within a certain range, the spindle speed has little influence on the overall wear resistance of the bit, but when the spindle speed increases, the machining efficiency can be significantly improved. The results obtained in this work can offer a valuable reference for the use of sintering diamond thin-wall core bits in the hole drilling of bulletproof ceramics.
机译：防弹陶瓷通常坚硬易碎，具有高弹性模量，高抗压强度和低拉伸强度。在加工防弹陶瓷时，严重的刀具磨损使其难以获得所需的加工质量和效率，尤其是在钻孔中。在这项工作中，对Al2O3防弹陶瓷（99％（重量））钻孔时烧结金刚石薄壁芯钻头的整体磨损率进行了深入的实验研究。选择每个钻孔后的钻头质量损失，以代表钻头的整体磨损率。根据实验数据，分析了主要钻头性能和加工工艺参数对钻头整体磨损率的影响。根据讨论的结果，在测试条件下，较细的金刚石砂粒，较高的金刚石浓度，较小的水隙，较薄的壁厚或较低的钻头负荷都可以降低钻头的磨损率。但是，在一定范围内，主轴转速对钻头的整体耐磨性几乎没有影响，但是当主轴转速增加时，可以显着提高加工效率。这项工作获得的结果可为在防弹陶瓷的孔钻中烧结金刚石薄壁芯钻头的使用提供有价值的参考。

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