The knowledge of the side force (側方力) acting on the shearing tool is necessary for the analysis of shearing-phenomena and the design of shearing tools, so the author measured this side force acting on straight-edged, double-sided shearing tool with a piezo-electric dynamometer (Fig. 3～7). The specimens for this experiment were cut off from a 1.6 mm thick mild steel plate (軟欽板), and a 2.1 mm thick copper plate (銅板), and their sides were ground. The specimens were sheared fixedly (Fig.2(a)), supportedly (Fig.2(b)), as a cantilever (Fig.2(c)), or freely (like scissoring,Fig.2(d)). In most cases, the obtained side force (-punch stroke ポンチ・ストローク)diagramms are similar to the shearing force(-punch stroke) diagramms (Fig.8～19). The side force in case of shearing freely can be analyzed theoretically, and these analytical results coincide with the experimental results, in which the maximum side force increases linearly with the die clearance (クリアランス), (Fig.20, lowest part). But in case of shearing fixedly, supportedly and as a canti-lever, the maximum side force decreases with the die clearance similarly to the maximum shearing force, (Fig.20,upper 3 parts). The ratio (λ) of side force to shearing force (on the one die side) changes with the punch stroke, and the values of λ at the punch stroke giving maximum value to the shearing force, increase about linearly with the die clearance in case of shearing supportedly, freely and as a canti-lever, but decrease in case of shearing fixedly, (Fig. 21 & 22). For the mild steel specimens, this λ in case of shearing fixedly is about 0.33 at the clearance of 1 %, and in case of shearing supportedly and as a canti-lever, it is about 0.38 at the same clearance (1 %), but this λ in case of shearing freely is. about 0.40 at the clearance of 1 %, (Fig.21). For the copper specimens, these λ in case of shearing fixedly and supportedly are respectively about 0.15 and 0.17 at the clearance of 1 %, (Fig. 22). Especially in case of shearing freely, if the die clearance is large, the side force is also very large, so we must keep the die clearance as small as possible. When we must calculate the strength at designing the shearing tools, it is safe to assume that the material is sheared freely by a straight-edged tool.

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In the laboratory to which the author is belonging, the experiments to establish the machining standards for a number of important materials standardized by the Government (JIS) has been just started as the big project. This report is for establishing the machining standard of 18-8 stainless steel. Here, the most suitable carbide grade and the best rake angle for turning the stainless steel have been selected from the viewpoint of two aspects of the tool life, flank wear and crater, and under the best combination of the above two, the feed effect has been studied. As a result, the machining standard of speeds, feeds and tool life equations for various combinations of tool-life criterions have been summarized in a table.

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In the 1st report, hydrodynamic analysis on the flow around a float and an inner wall of tapered tube was developed by assuming that the taper was small, and relations which can be applied to gas and liquid, were introduced. In the 2nd report, the relations obtained theoretically in the 1st report, were verified through experiments.
The purpose of the 3rd report is to introduce general relations about performance of floatarea-type flow meters which are applied when the taper of a tube is not small. The method to calculate the relation between a position of float and a flow rate for a given tapered tube and a float, is suggested and the effect of viscosity of a working fluid on the performance of this flow meter is investigated.

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The purpose of this report is to verify experimentally the relations introduced by the analysis in the 3rd report. In the experiments, various kinds and forms of floats and tubes of large or small taper, were tested by water and air. Those experiments prove the results obtained in the 3rd report, and the relation between a position of float and a flow rate is shown to agree with that reduced by the analysis. The effect of the inclination of the tapered tube from the vertical line on the performance was tested, and for an accurate measurement the inclination is explained to have to be kept within 1 degree. The precision of this flow meter was investigated and shown about 0.7%.
From the analysis in the 3rd report and experiments in this report, we get a conclusion that the performance of float-area-type flow meter and the effect of viscosity and density of working fluid can be calculated, and data for designing them can be obtained from the relations introduced in the 3rd report.

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最近10年間(1948-1957)にわたる砥粒加工に関する女献調査を計画し,砥粒加工研究会々員の協力によつて収集を行つた.その後專門委員会で整理を終つたのでこゝにまとめて報告する.何分にも内外70種にわたる諸雑誌を少数の委員の手で分担調査したので,調査洩れ丈献があることが予想されるが,いずれ機会を見て順次補充をして完壁を期したい.

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