生産性向上や加工費削減，あるいは歯車加工時の切り上げ長さを短くするために，歯車材を高周波熱処理によって高硬度にした後に直切りドライホブ加工する技術を開発した．まず，歯車用0.45%炭素鋼丸棒が高周波熱処理によって指定深さまでHRC53-56に硬化された．その後，超硬ホブによって切削油なしでホブ切り加工された．これをRGC(Round bar Gear Cutting)加工と呼ぶ。RGC加工がモジュール0.8から1.25，ねじれ角25°のはすば歯車に適用された．超硬ホブの長さを軸方向にほぼ2分割し，粗加工と仕上げ加工に用いた．RGC加工は高剛性ホブ盤で行った．367個加工後の歯車精度は，JIS B1702-1960ではJIS1-2級であった．歯面粗さは，最大高さ粗さRz≒１μであった．
はFC200，ジャーナルはS45C，軸受最大接触圧力はP=9.49MPa，すべり速度はV=0.208から1.01m/sであった．使用したグリースはNLGI 0号リチウムグリース，およびグリース潤滑の特徴を明らかにするために，一般的なギヤ油 ISO VG 150も使用した．グリース潤滑での無負荷時摩擦トルクは，ペトロフの式による理論値よりも大きかった．すべり速度が速くなると，ギヤ油潤滑時の約1.1倍に近づいた．グリース潤滑時摩擦係数は， f =0.0036から0.0052だった．ギヤ油潤滑ではおおよそ0.004だった．グリース潤滑時すべり面温度上昇値は，θ(K)=4.09×PV+10.2，で求めることができる，ことなどがわかった．
It is necessary to solve the characteristic of an atmospheric boundary layer or a strong wind in the case of construction of a large-sized structure. A wind tunnel experiment as the analysis for a natural wind is popular method. It is important to produce the flow which has the same turbulent characteristic as the natural wind in a tunnel. This research aims at reproducing the turbulent flow of the natural wind in a wind tunnel. As an active method, time changing the number of rotations of the fan in a wind tunnel equipment is carried out. Furthermore, the method of arranging a fan one by one to turn reverse rotation, which called Quasi-Grid method was used. As the current research, in addition to the conventional active control, the quasi-grid method was introduced. The result was obtained from the combination of quasi-grid method will be effective as a preset value at the time of reproducing arbitrary wind velocity in a wind tunnel. It turned out that the frequency region of the inertia sub range to be generated turbulent flow by spectral analysis.
The exhaust-heat recovery boiler of a copper refining plant has the role of which oxidizes the sulfide contained gas by blowing air from the exhaust gas discharged in self-melting furnace. When observing an internal phenomenon about the high temperature and large scale phenomenon, the real scale experiment is difficult. Then, in order to solve the problem, the numerical simulation was used. In this research, the numerical simulation of the flow blowing with the exhaust gas in a boiler is carried out. The main purpose of this research is to search the optimal condition for the air entry rate making an optimizing mixed state by visualizing those gases. As a result of calculating by a numerical simulation, it turned out that the circulation style is deeply related to the air current mixture in a boiler. If the big circulation style in a boiler is obtained, it will be thought that air current mixture of an exhaust gas and
air is promoted.
I have lectured “General Principle of Technique” in OITA College of Technology for about 25 years. And I volunteered activity of welfare, nursing and medicine for about 10 years. Making the most of my these trial and perience, “Proposal of improving instrument in nursing and medicine” was set to students for task. Lecture was composed as follow. At first, the outline of technique history was explained and “general laws for technique development” was emphasized. Next we investigated needs about instruments in welfare, nursing and medical fields using Questionnaire i.e. “KOMATTA MONO CHOUSA” to the hospital and welfare home for the aged. Basing on results, students made effort for invention to various “NEEDS”．Students presented their “Proposal of improving instrument“ during in school hours and commented on them one another.