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Volume 47, Issue 9
Displaying 1-19 of 19 articles from this issue
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[in Japanese]1981 Volume 47 Issue 9 Pages 1029-1034
Published: September 05, 1981
Released on J-STAGE: June 30, 2009
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[in Japanese], [in Japanese]1981 Volume 47 Issue 9 Pages 1035-1041
Published: September 05, 1981
Released on J-STAGE: June 30, 2009
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[in Japanese]1981 Volume 47 Issue 9 Pages 1042-1048
Published: September 05, 1981
Released on J-STAGE: June 30, 2009
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[in Japanese]1981 Volume 47 Issue 9 Pages 1049-1055
Published: September 05, 1981
Released on J-STAGE: June 30, 2009
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[in Japanese]1981 Volume 47 Issue 9 Pages 1056-1062
Published: September 05, 1981
Released on J-STAGE: February 16, 2010
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[in Japanese]1981 Volume 47 Issue 9 Pages 1063-1068
Published: September 05, 1981
Released on J-STAGE: June 30, 2009
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[in Japanese], [in Japanese]1981 Volume 47 Issue 9 Pages 1069-1075
Published: September 05, 1981
Released on J-STAGE: June 30, 2009
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[in Japanese]1981 Volume 47 Issue 9 Pages 1076-1080
Published: September 05, 1981
Released on J-STAGE: June 30, 2009
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[in Japanese]1981 Volume 47 Issue 9 Pages 1081-1087
Published: September 05, 1981
Released on J-STAGE: June 30, 2009
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[in Japanese]1981 Volume 47 Issue 9 Pages 1088-1095
Published: September 05, 1981
Released on J-STAGE: June 30, 2009
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[in Japanese]1981 Volume 47 Issue 9 Pages 1096-1101
Published: September 05, 1981
Released on J-STAGE: June 30, 2009
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Comparison of Predicted and Experimental ResultsAkihiko HIROTA, Kazuo KASAHARA1981 Volume 47 Issue 9 Pages 1102-1108
Published: September 05, 1981
Released on J-STAGE: June 30, 2009
JOURNAL FREE ACCESSIn the 1st part of this investigation a cutting mod-el considering the condition of side curl of the chip was proposed, and the energy method was extended to the case of drilling process for predicting the chip formation and the cutting forces. In this paper a dynamometer with piezo-electric load washer is constructed and used to measure the cutting forces. In order to freeze the actual process of chip formation for measurement of chip flow angles along the cutting edge, a quick-stop apparatus is also designed and constructed. The experimental tests are run with various pilot holes. The cutting forces and the chip formation such as chip flow angle, normal shear angle, radius of side curl of the chip are measured and compared with those from the theoretical prediction. It is clarified that the process of chip formation depends on the width of the engaged cutting edge with the workpiece. The predicted results appear to give good qualitative and quantitative explanations of the experimental results.View full abstractDownload PDF (1466K) -
Shoichiro SHIN, Hiroshi YANO1981 Volume 47 Issue 9 Pages 1109-1115
Published: September 05, 1981
Released on J-STAGE: June 30, 2009
JOURNAL FREE ACCESSSeveral kinds of regression functions of SN curve for fatigue test have been suggested and the least squares method is used to determine parameters in each equation. In the case of a non-linear function, however, the application of the least squares method cannot always enough explain properties of objective lots. In this paper it has been clarified that the application of the experimental regression analysis is able to correct these defects and to estimate the parameters in the functions and regression error. In the experiment the lots of samples consist of specimen which have been manufactured considering materials, conditions of heattreatment, hardness of specimen, and so on. Fatigue strength (or SN curve) of each lot and overall estimated error are obtained by using the method of experimental regression analysis. The estimated error of the regression functions in this experiment is 21. 6-31. 4 MPa in standard deviation. As the application method of this new system in future, it is indicated that new obtained data of fatigue test in addition to the group of accumulated data are analyzed and that SN curves are able to be estimated consistently each other even when a number of new data is small.View full abstractDownload PDF (1606K) -
Application of MicrocomputerJiro OTSUKA, Fumitaro SEKINE, Hiroyuki KANESADA1981 Volume 47 Issue 9 Pages 1116-1121
Published: September 05, 1981
Released on J-STAGE: June 30, 2009
JOURNAL FREE ACCESSThis paper presents the process of obtaining the leadscrew of high pitch accuracy in thread grind-ing. Leadscrews used for machine tools or length measuring machines often act as a standard scale. They are often ground after hardening. With the development of NC machine tools, their high level precision is needed. This paper describes the improvement of the control system by applying micro computer to the correction device of the table feed error in the thread grinding machine and the discussion of the table feed error and the lead error of the ground workpiece screw by use of Fourier analysis. As the result, the leadscrew with high pitch accuracy can be obtained.View full abstractDownload PDF (1279K) -
Shinichi MIYAZAWA, Kaneyoshi MIYASAKA, Hidehiko TAKEYAMA1981 Volume 47 Issue 9 Pages 1122-1127
Published: September 05, 1981
Released on J-STAGE: June 30, 2009
JOURNAL FREE ACCESSThis study is to investigate a methodology of automatic finish grinding of a curved surface generated in the previous process and to develop the prototype machine. The principle of this method is to control the feed motions of the grinding tool based on a definite relation between stock removal rate and torque actuated on the grinding tool. The machine consists of torque detector, analogue calculator to determine the horizontal and vertical feed rate components referring to the torque sensed, and servo mechanism. The drawback of this method that is the stock removal rate differs a little between positive and negative slopes of surface profile. The error can be tolerably reduced for practical application by refining the detecting system and by introducing an elastic finishing tool.View full abstractDownload PDF (1315K) -
Relation between Composition and Grinding Wheel LifeShohei OGAWA, Takashi OKAMOTO1981 Volume 47 Issue 9 Pages 1128-1133
Published: September 05, 1981
Released on J-STAGE: June 30, 2009
JOURNAL FREE ACCESSIn the previous report, it was experimentally confirmed that mechanical properties of grinding wheels in equal grade were different when vitrified bonding material composition which consist of feldspar, pottery and clay minerals component varied. In this paper, the dry surface grinding experiments were performed on the grinding wheels which had different vitrified bonding material compositions and grinding forces and wear flat areas on the working surface of grinding wheels were measured, and then effects of the composition were studied. The results obtained are as follows. (1) The bending strength of grinding wheels are smaller than about 20 MPa or greater than about 30 MPa, most grinding wheels belong to shedding type or glazing, type respectively, and the grinding wheels belonged to both types are not related to the compositions and grades. (2) But if the bending strength is from about 20 to 30 MPa, the grinding wheel life depends remarkably on the composition in which contains feldspar component especially and percentage bond-ing material. (3) The bonding material containing a less feldspar component has low strength and poor adhesive ability. Therefore the grinding wheel using this bonding material must use more percentage bonding material than one containing more feldspar component for having a certain bending strength. Much percentage bonding material contributes to the increase of wear flat area on the grinding wheel and then the decrease of the grinding wheel life.View full abstractDownload PDF (1444K) -
Oxidation Rate Law of WorkpieceSuehisa KAWAMURA, Michio MITSUHASHI1981 Volume 47 Issue 9 Pages 1134-1139
Published: September 05, 1981
Released on J-STAGE: June 30, 2009
JOURNAL FREE ACCESSIn order to estimate the thickness of oxide layer, which is formed on the finished surface of workpiece and yields the discoloration of the ground surface, it is necessary to know the oxidation rate law of workpiece and the surface temperature in process of the growing layer. Therefore, in the present research, the rate process on various steels have been measured with the specially prepared samples and the property of the oxide layer is also analyzed. And as the results of the interferometry, it is verified that the thickness (d) of the layer with times (τ) is given by d= (Hτ) 1/3, where H is the oxidation rate constant and could be related to temperature by the Arrhenius' equation.View full abstractDownload PDF (1330K) -
[in Japanese]1981 Volume 47 Issue 9 Pages 1140-1141
Published: September 05, 1981
Released on J-STAGE: June 30, 2009
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[in Japanese]1981 Volume 47 Issue 9 Pages 1142-1143
Published: September 05, 1981
Released on J-STAGE: June 30, 2009
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