STUDY ON THE QUALITY OF THE FINISHED SURFACE OF TITANIUM ALLOYS ATTAINABLE BY HIGH QUALITY AND HIGHLY EFFICIENT GRINDING USING A DIAMOND GRINDING WHEEL

金刚石砂轮高质量高效磨削钛合金表面质量的研究

• 批准号: 04650121
• 负责人: KUMAGAI Nobuo
• 金额: $ 0.64万
• 依托单位: KANSAI UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1992
• 资助国家: 日本
• 起止时间: 1992 至 1993
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-04650121/
• 关键词: Titanium alloys; Characteristics of ground surface; Residual stress; Grinding characteristics; Fatigue strength; Grinding layr; Surface integrity; Diamond grinding wheel; 研削加工; 研削特性

Grinding was performed at a conventional wheel speed(32 m/s) using a diamond wheel, and a high pressure coolant was injected at the grinding point to achieve highly efficient and superior grinding of titanium alloys. In order to clarify the quality of the finished surface ground by this method, the surfaces of annealed materials of mainly Ti-6Al-4V alloys were ground under various grinding conditions, and measurements were taken of the roughness and hardness of the finished surface, the thickness of the layr deteriorated by grinding, residual stress, etc. The test results revealed the following. (1) The grinding wheel best suited for this grinding is a diamond wheel with tougher grains, a strong grain-bonding force, and pores in the surface of the grinding wheel which allow for permeation of the coolant. There is also an optimum grain size. (2) The quality of the finished surface is markedly improved with increased coolant pressure. (3) Compression-induced residual stress, whose distribution immediately under the finished surface was of the "compression type" was observed in the finished surface on which the experiment was made.Next, in order to clarify the fatigue strength of the ground articles, fatigue test pieces of the annealed Ti-6Al-4V alloy plates were ground on both the obverse and reverse sides, and alternating plane-bending fatigue testw were then made on the test pieces. The results revealed the following. (1) The fatigue strength was highest with the aforementioned grinding wheel, and was higher than that of the annealed material. (2) The fatigue strength also increased when the coolant pressure and concentration were increased. (3) The residual stress from grinding and the thickness of the layr deteriorated by grinding influence the fatigue strength rather than the roughness of the finished surface.

使用钻石轮以常规的车轮速度（32 m/s）进行研磨，并在研磨点注入高压冷却剂，以实现钛合金的高效和优质磨削。为了通过这种方法阐明成品表面的质量，在各种磨削条件下，主要是TI-6AL-4V合金的退火材料的表面是磨碎的，并且对成品表面的粗糙度和硬度进行了测量，Layr的厚度，Layr的厚度，通过磨削，残余压力等降低了LAYR的厚度。 （1）最适合这种研磨的磨轮是钻石轮，具有较硬的谷物，强烈的晶粒束缚力和砂轮表面的毛孔，可以使冷却液渗透。还有最佳的晶粒尺寸。 （2）随着冷却液压的增加，成品表面的质量显着提高。 （3）压缩诱导的残留应力，在完成实验的成品表面上观察到了压缩的残留应力。为了澄清地面物品的疲劳强度，在完成的实验表面上观察到了疲劳强度，然后将ti-6al-4V合金板的疲劳测试片段固定在两个侧面和反向的测试上，然后进行了反向测试，并在反向的范围内进行了易于锻炼。结果揭示了以下内容。 （1）上述研磨轮的疲劳强度最高，并且高于退火材料。 （2）当冷却液压力和浓度增加时，疲劳强度也会增加。 （3）磨削和layr厚度的残余应力因研磨而恶化，影响疲劳强度而不是成品表面的粗糙度。

项目成果

N.KUMAGAI,K.KAMEI,Y.TANAKA,AND T.YOSHIMURA: "THE GRINDING OF A TITANIUM ALLOY UNDER HIGH COOLANT PRESSURE,(6TH REPORT), EFFECT OF THE GRINDING FLUID ON THE INTEGRITY OF A GROUND SURFACE AND ITS FATIGUE STRENTH." PREPRINT FOR ANNUAL MEETING OF JSPE,MARCH.

N.Kumagai、K.Kamei、Y.Tanaka 和 T.YOSHIMURA：“高冷却液压力下钛合金的磨削”（第 6 次报告），磨削液对磨削表面完整性及其疲劳强度的影响

熊谷信男,亀井清,田中行雄,渕上正晴,吉村哲郎: "チタン合金のジェット注液研削(第6報)-研削仕上面性状及び疲れ強さに及ぼす研削油剤の影響-" 1994年度精密工学会春季大会学術講演会講演論文集. 1. (1994)

Nobuo Kumagai、Kiyoshi Kamei、Yukio Tanaka、Masaharu Fuchigami、Tetsuro Yoshimura：“钛合金的射流喷射磨削（第6次报告）-磨削液对成品表面性能和疲劳强度的影响-”1994年精密工程学会春季会议学术讲座论文集1.（1994）

N.KUMAGAI,K.KAMEI,Y.TANAKA: "EFFECT OF DIAMOND WHEEL GRAIN SIZE ON THE GRINDABILITY OF Ti-6AL-4V" Proceedings of 7th.World Conf.on Titanium. 8 (1993)

N.KUMAGAI、K.KAMEI、Y.TANAKA：“金刚石砂轮粒度对 Ti-6AL-4V 可磨性的影响”第七届世界钛会议录。

熊谷 信男,亀井 清,田中 行雄,吉村 哲郎: "チタン合金のジェット注液研削(第4報) ー研削仕上面性状及び疲れ強さに関する一考察ー" 1993年度精密工学会春季大会学術講演会講演論文集. 557-558 (1993)

Nobuo Kumagai、Kiyoshi Kamei、Yukio Tanaka、Tetsuro Yoshimura：《钛合金的喷射喷射磨削（第4次报告）-磨削加工表面的性能和疲劳强度的研究-》1993年精密工程学会春季会议学术讲座集。 557-558（1993）

熊谷信男,亀井清,田中行雄,渕上正晴,吉村哲郎: "チタン合金のジェット注液研削(第6報)-研削仕上面性状及び疲れ強さに及ぼす注液圧力の影響" 1994年度精密工学会春季大会学術講演会講演論文集. 1. 89-90 (1994)

Nobuo Kumagai、Kiyoshi Kamei、Yukio Tanaka、Masaharu Fuchigami、Tetsuro Yoshimura：《钛合金的射流喷射磨削（第六次报告）——喷射压力对成品表面性能和疲劳强度的影响》1994年精密工程学会春季学术会议论文集1. 89-90 (1994)