1.

論文

論文
岡田, 将人 ; 細川, 晃 ; 田中, 隆太郎 ; 上田, 隆司
出版情報: 精密工学会誌 = Journal of the Japan Society of Precision Engineering.  75  pp.979-983,  2009-01-01.  精密工学会 = The Japan Society for Precision Engineering
URL: http://hdl.handle.net/2297/39091
概要: The cutting performance of some coated carbide tools in hardmilling of hardened steel is investigated. The cutting characteristics are mainly evaluated by tool wear and temperature at flank face for four types of coating films on two types of base materials. Cutting force and surface roughness are also examined. The temperature of cutting tool is measured using a two-color pyrometer with an optical fiber. The tool flank wear becomes large in the case of TiN and TiCN coated tools. The tool flank temperature increases with the increase of surface roughness of coated film, and reaches approximately 500°C for TiAlN/ AlCrN coated tool. On the other hand, the cutting forces do not change so much with surface roughness of coated film. In the case of P30-grade cemented carbide as base material, tool flank wear and flank temperature become large compared with K10- grade. The surface roughness of workpiece increases with the increase in tool flank temperature more than approximately 530°C. 続きを見る
2.

論文

論文
田中, 隆太郎 ; 山根, 八洲男 ; 岡田, 将人 ; 細川, 晃 ; 上田, 隆司
出版情報: 精密工学会誌 = Journal of the Japan Society of Precision Engineering.  73  pp.803-807,  2007-01-01.  精密工学会 = The Japan Society for Precision Engineering
URL: http://hdl.handle.net/2297/38822
概要: This paper deals with the machinability of BN added Steels in end milling. The cutting tests were carried out by end milling carbon steel JIS S45C, S55C and these BN added steels with carbide tool and TiAlN coated carbide tool. Tool wear, cutting temperature, and, surface roughness were measured and discussed. In end milling BN added steel with square end mill, the progress rate of flank wear width was decreased and fracture at corner was suppressed in comparison with that in machining standard steel. In case of ball end mill, flank wear in end milling BN added steels were smaller in comparison with standard steel. In case of S45C, boundary wear was observed, however it was not observed in end milling BN added steel. BN added showed almost the same surface roughness as standard steel. The temperature of flank wear part in turning work based S55C were 50 °C higher in comparison with S45C base work. The temperature of throw away end mill was higher 100°C in comparison with solid square end mill. There were not significant difference between the temperature in end milling standard steel and BN added steels. 続きを見る
3.

論文

論文
田中, 隆太郎 ; 林, 勇伝 ; 田邉, 一真 ; 上田, 隆司 ; 細川, 晃
出版情報: 精密工学会誌 = Journal of the Japan Society of Precision Engineering.  73  pp.1025-1029,  2007-09-05.  精密工学会 = The Japan Society for Precision Engineering
URL: http://hdl.handle.net/2297/38916
概要: This study deals with the trial for improvement of chip controllability in turning with selective laser heat treatment for workpiece. Selective heat treatment for carbon steel JIS S45C was carried out with Nd:YAG laser which could be transmitted through an optical fiber and shows higher absorption rate against carbon steels than CO2 laser. In turning of these selective laser heat threatened carbon steel, the chip form changed regular curl from irregular curl and chip breakability was improved compared with non-laser treated carbon steel. Surface roughness was obviously smaller comparing with non-laser treated carbon steel. Especially in the case that the depth of cut was larger, the surface roughness was smaller. As for cutting force, the principal force was slightly smaller, but the thrust force and feed force were almost the same. The cutting temperature was slightly lower. The tool wear was almost same as that in the case of non-laser treated carbon steel. 続きを見る
4.

論文

論文
佐藤, 昌彦 ; 上田, 隆司
出版情報: 精密工学会誌 = Journal of the Japan Society of Precision Engineering.  67  pp.839-843,  2001-01-01.  精密工学会 = The Japan Society for Precision Engineering
URL: http://hdl.handle.net/2297/38766
概要: In turning of platinum alloy Pt850, the wear behavior of tools and the cutting characteristics of Pt850 are investigated experimentally. K10 carbide, cermet, ceramics and PCD are used as tool materials. K10 carbide and cermet are not suitable for the cutting of this material because severe wear on the tool flank was observed after a few second of cutting, that is, the width of the flank wear land was about 1 mm after 10 seconds cutting. The width of wear land of Al2O3 and Si3N4 ceramic tools was small compared with K10 carbide tool, but the cutting forces increased rapidly as the cutting proceed. PCD tool can be used for cutting of Pt850 because the width of flank wear land is much small compared with other tool materials used in this experiment and the increasing rate of cutting force is not so great. The influence of cutting speed on the flank wear of PCD tool is small. The surface roughness of work material Pt850 becomes lower when the smaller feed rate is chosen as a cutting condition and the cutting tool of larger radius corner is used. 続きを見る
5.

論文

論文
田中, 隆太郎 ; 山根, 八洲男 ; 関谷, 克彦 ; 鳴瀧, 則彦 ; 白神, 哲夫
出版情報: 精密工学会誌論文集 = Journal of the Japan Society for Precision Engineering. Supplement. Contributed papers.  72  pp.1227-1231,  2006-01-01.  精密工学会 = The Japan Society for Precision Engineering
URL: http://hdl.handle.net/2297/43213
概要: This paper deals with the machinability of BN Added Steels in turning with several cutting tools. The highest Al content TiAlN coated carbide tool showed smaller flank wear and crater depth than those of the other TiAlN, TiC, TiN and TiCN coated carbide tools. It shows that these tool wears depend on the affinity between tool surface and adhered layer including AlN. The wear of the alumina ceramic tool in turning BN added steel was smaller than that in turning standard steel. However the wears in turning low Al content BN added steel and high Al content carbon steel were almost the same as that in turning standard steel. It shows that appropriate Al and BN in work material are necessary to obtain the longer tool life. The wears of the TiC added alumina ceramic tool and the CBN tool in turning BN added steel were also smaller than those in turning standard steel. 続きを見る
6.

論文

論文
田中, 隆太郎 ; 山根, 八洲男 ; 上田, 隆司 ; 細川, 晃 ; 白神, 哲夫
出版情報: 砥粒加工学会誌 = Journal of the Japan Society of Grinding Engineers.  52  pp.28-33,  2008-01-01.  砥粒加工学会 = The Japan Society for Abrasive Technology
URL: http://hdl.handle.net/2297/28416
概要: 本報告は,BNが添加された鋼のドリル加工における被削性について述べている.穴加工は旋削加工,フライス加工とともに,切削加工の中でも大きなウェイトを占める重要な加工である.そこで,比較的新しく開発された快削鋼であるBN添加鋼についてハイスドリ ルを用いた穴加工を行い,標準鋼であるJIS S45Cと比較し,被削材中の化学成分が工具寿命に与える影響を調査し被削性を評価した.切削実験を行った結果,BN添加鋼は標準材と比べ長い工具寿命が得られることが明らかとなった.このことからハイスドリルによる比較的低速のドリル加工においてもBN添加鋼が優れた被削性を示すことがわかった.また,BNの添加による切削温度への影響を調べるために工具-被削材熱電対法で切削温度の測定を行った.切削温度はほぼ同程度であり,切削抵抗はわずかではあるが低い値を示すことがわかった. 続きを見る
7.

論文

論文
細川, 晃 ; 南部, 彰 ; 田中, 隆太郎 ; 山田, 啓司 ; 上田, 隆司
出版情報: 精密工学会学術講演会講演論文集 = 2004 JSPE Spring Meeting.  2004 Spring  pp.523-524,  2004.  精密工学会 = The Japan Society for Precision Engineering
URL: http://hdl.handle.net/2297/00050309
概要: 金沢大学理工研究域機械工学系<br />前報では光ファイバ型2色温度計を用いてエンドミル加工におけるオイルミスト供給時の工具逃げ面温度を測定し,ミスト粒径,ミスト流量,ミスト供給位置が工具逃げ面温度に及ぼす影響について検討した. 本報では,その第3段階として,超硬工具およびコーティング工具における切削温度と工具損耗量を測定し,オイルミスト供給が工具損耗形態に及ぼす影響について詳細に検討している.<br />出版者照会後に全文公開 続きを見る
8.

論文

論文
田中, 隆太郎 ; 細川, 晃 ; 山田, 啓司 ; 上田, 隆司 ; 林, 勇伝
出版情報: 精密工学会学術講演会講演論文集 = 2005 JSPE Spring Meeting.  2005 Spring  pp.671-672,  2005.  精密工学会 = The Japan Society for Precision Engineering
URL: http://hdl.handle.net/2297/00050034
概要: 金沢大学理工研究域機械工学系<br />This study deals with the machinability of steels in turning with additional current. Tested w ork materials were plane carbon steel JIS S45C and BN added steel which has good machinability at high cutting speed. Turning tests were performed by carbide tool P30 in order to investigate the influence of electrical conditions of closed circuit system on the cutting mechanism of BN added steel. The tool life and cutting force was investigated practically and these results were discussed. 従来,鋼の被削性を改善するために快削性添加物や鋼中の介在物の組成や形態を制御するなど多くの快削鋼が研究·開発がされてきた.その中のひとつであるBN添加鋼は切削中にベラーグと呼ばれる保護膜を摩耗面上に形成し,高速域で標準鋼に比べ工具摩耗を大幅に抑制する.本研究ではこのBN添加鋼を最大20mAの微量通電下で超硬工具による旋削加工を行い電流量と摩耗量の関係を調べ,その摩耗抑制効果について検討を行った.<br />出版者照会後に全文公開 続きを見る