1.

論文

論文
上田, 隆司 ; 鳥居, 明人 ; 中村, 示 ; 杉田, 忠彰
出版情報: 精密工学会誌 = Journal of the Japan Society of Precision Engineering.  55  pp.2273-2276,  1989-12-05.  精密工学会 = The Japan Society for Precision Engineering
URL: http://hdl.handle.net/2297/38880
2.

論文

論文
上田, 隆司 ; 鳥居, 明人 ; 山田, 啓司
出版情報: 精密工学会誌 = Journal of the Japan Society of Precision Engineering.  60  pp.1616-1620,  1994-11-05.  精密工学会 = The Japan Society for Precision Engineering
URL: http://hdl.handle.net/2297/38827
概要: In surface grinding of steel, the temperature in the surface layer of the workpiece and the temperature of cutting grains on wheel surface are measured by means of a new method, in which an optical fiber accepts the infrared flux radiated from the object and transmits it to an infrared detector InAs cell. This I.R.P. is suitable for measuring the temperature of a very small object whose temperature changes rapidly. The influence of the physical properties of workpiece and grinding conditions on the grinding temperature and the thermal partition coefficient are investigated. A carbon steel, a stainless steel and a cast iron are used as work materials. The thermal partition coefficients obtained by experimental results are compared with those obtained theoretically. 続きを見る
3.

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.1850-1855,  2001-11-05.  精密工学会 = The Japan Society for Precision Engineering
URL: http://hdl.handle.net/2297/38881
概要: In this paper, the activity of effective cutting grains in cutting of work and the activity of effective cutting grains in generation of finished surface are described. The former was investigated by the measurement of wheel surface temperature immediately after grinding using infrared radiation pyrometer with an optical fiber and the latter was investigated by the measurement of finished surface roughness using three-dimensional surface roughness tracer respectively. These activity of cutting grains in the whole circumference of wheel surface was clarified. The results obtained are as follows: 1) Cutting grains which have effective concern with cutting of work certainly act in every rotation of wheel. 2) The number of effective cutting grains in cutting of work increases as wheel depth of cut increases. 3) Cross-sectional shape of scratch toward grinding direction on the finished surface accurately correspond in the every period of one circumference of wheel in the order of sub-micrometer. 4) Finished surface is generated by some identical cutting grains even when wheel depth of cut increases. 続きを見る
4.

論文

論文
上田, 隆司 ; 佐藤, 昌彦 ; 杉田, 忠彰
出版情報: 精密工学会誌 = Journal of the Japan Society of Precision Engineering.  61  pp.1448-1452,  1995-10-05.  精密工学会 = The Japan Society for Precision Engineering
URL: http://hdl.handle.net/2297/38879
概要: Temperature of interface between a cutting tool and a workpiece is measured using two-color pyrometer with a fused fiber coupler. A conical tool is used as the cutting tool which is made of translucent alumina sintered under HIP, and 0.55% carbon steel is used as a workpiece. The infrared rays radiated from the interface and transmitted through the conical tool are accepted by a fused fiber coupler and led to two infrared detectors of different spectral sensitivity. Temperature is obtained by calculating the ratio of the output voltage from these two detectors. The results obtained are as follows. The temperature increases very rapidly and reaches 1000°C at about 40 μs after the beginning of cutting. The rate of increase of temperature is very great : about 108 °C/s at the cutting speed of 1 500 m/min. The temperature increases with the increase of cutting speed, but at a speed faster than 1000 m/min its influence is small. The temperature shows a tendency to saturate about 1300-1400°C as the cutting speed increases. 続きを見る
5.

論文

論文
上田, 隆司 ; 山田, 啓司 ; 杉田, 忠彰
出版情報: 精密工学会誌 = Journal of the Japan Society of Precision Engineering.  56  pp.1452-1455,  1990-08-05.  精密工学会 = The Japan Society for Precision Engineering
URL: http://hdl.handle.net/2297/39418
6.

論文

論文
上田, 隆司 ; 入山, 孝宏 ; 杉田, 忠彰
出版情報: 精密工学会誌 = Journal of the Japan Society of Precision Engineering.  61  pp.278-282,  1995-02-05.  精密工学会 = The Japan Society for Precision Engineering
URL: http://hdl.handle.net/2297/39082
概要: A new type of Infrared Radiation Pyrometer using a fused fiber coupler is made, and its characteristics are investigated theoretically and experimentally. This pyrometer can be applied to measure the flush temperature of a small area on ceramics (PSZ) when it is irradiated with CO2 laser. In this pyrometer, the infrared rays radiated from the object are accepted by an optical fiber, and divided into two parts and transmitted to the two types of infrared detectors by a fused fiber coupler. The temperature is obtained by calculating the ratio of the output voltages from these two detectors. The characteristics of this pyrometer are as follows. It is possible to measure the temperature with controlling the disturbance of the emissivity. When the object has a surface of uniform temperature, the measuring temperature does not depend on the size of the object. In the case when the object has the distribution in temperature, it is possible to estimate the maximum temperature correctly from the experimental results. 続きを見る
7.

論文

論文
上田, 隆司 ; 佐藤, 昌彦 ; 杉田, 忠彰
出版情報: 精密工学会誌 = Journal of the Japan Society of Precision Engineering.  62  pp.120-124,  1996-01-01.  精密工学会 = The Japan Society for Precision Engineering
URL: http://hdl.handle.net/2297/38765
概要: The influence of cutting speed, and thermal properties of the work material and the tool material on the thermal partition coefficient is investigated theoretically and experimentally. The temperature at the top of a conical tool is measured immediately after micro chip forming using an infrared radiation pyrometer with an optical fiber. A carbon steel, a titanium, a molybdenum and a tungsten are used as work materials, and a silicon nitride Si3N4, a zirconia ZrO2 and a diamond are used as tool materials. The cutting temperature increases in proportion to the 1/2 power of cutting speed and saturates to the melting point of work material. The fraction of heat conducted into the cutting tool is independent on the cutting speed, and it becomes larger as the thermal conductivity of workpiece is smaller or that of tool material is larger. In the diamond tool which has the highest thermal conductivity, its thermal partition coefficient is the highest, but the tool tip temperature is the lowest. 続きを見る
8.

論文

論文
上田, 隆司 ; 山田, 啓司 ; 杉田, 忠彰
出版情報: 精密工学会誌 = Journal of the Japan Society of Precision Engineering.  56  pp.1683-1685,  1990-09-05.  精密工学会 = The Japan Society for Precision Engineering
URL: http://hdl.handle.net/2297/39090
9.

論文

論文
Ueda, Takashi ; Yassin, Abdullah ; Furumoto, Tatsuaki ; Hosokawa, Akira ; Tanaka, Ryutaro ; Abe, Satoshi
出版情報: 砥粒加工学会誌 = Journal of the Japan Society of Grinding Engineers.  52  pp.718-723,  2008-12-01.  砥粒加工学会
URL: http://hdl.handle.net/2297/16752
概要: 金沢大学理工研究域 機械工学系<br />金属粉末をレーザ光で焼結した材料を小径ボールエンドミルで切削したときの切削特性を切れ刃温度の観点から検討した.その結果,焼結材料の表面は硬さが高くなるが,1mm程度内部になるとほぼ均一な 材質となる.硬さの高いSCM粉末が付着しているためであり,表面を切削するとき切れ刃温度は高くなる.切削速度が切れ刃温度に及ぼす影響は大きく,速度が増すに伴い切れ刃温度は上昇するが,送りや切込みの影響は小さい.径の異なるボールエンドミルで加工した場合,回転数が同じであれば切れ刃温度は大きく影響を受けない.焼結材料の熱伝導率が低いことが,切れ刃温度に大きく影響すると考えられる. 続きを見る