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 ; 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
3.

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
4.

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
5.

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
6.

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