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Volume 26, Issue 310
Displaying 1-8 of 8 articles from this issue
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[in Japanese]1960 Volume 26 Issue 310 Pages 647-656
Published: November 05, 1960
Released on J-STAGE: May 07, 2010
JOURNAL FREE ACCESSDownload PDF (1976K) -
Makio MIZUNO1960 Volume 26 Issue 310 Pages 657-662
Published: November 05, 1960
Released on J-STAGE: February 16, 2010
JOURNAL FREE ACCESSThe wear tests of some bearing materials are carried out by using a newly designed portable wear tester. And the characteristics of the process of wear about each material are discussed by introducing a value Ws which is defined by the following equation.
Ws=h/pL
where h; depth of wear
p; contact pressure
L ; sliding length.View full abstractDownload PDF (3404K) -
In the Case of Crossed Helical Gear TypeKumao KON1960 Volume 26 Issue 310 Pages 663-666
Published: November 05, 1960
Released on J-STAGE: June 30, 2009
JOURNAL FREE ACCESSNoncircular gears have been generally manufactured by using cutting machines, such as hobbing machines or gear shapers fitted with special equipments. As the equipments, however, are very complicated, it is considered difficult to cut the teeth of noncircular gears ; besides accuracy is not satisfactory.
In this study, to make the noncircular gears easily with satisfactory accuracy, they are first cast, and then shaved with the lathe fitted with a shaving installation. This time, two sorts of elliptic gears are made, one is with module 2, the number of teeth 51, major axis 118mm and minor axis 110mm, and the other with module 2, number of teeth 49, major axis 102mm and minor axis 95 mm. Both of these gears are made of Aluminium and Brass.View full abstractDownload PDF (3783K) -
Ujiro NISHIYAMA, Taku INOUE, Simesu TANAKA1960 Volume 26 Issue 310 Pages 667-673
Published: November 05, 1960
Released on J-STAGE: June 30, 2009
JOURNAL FREE ACCESSRecently, the explosive metal forming has begun to drau considerable attention of the public.
The main reasons are the following :
1. Larger or more complicated shapes than ever can be formed easily with explosives.
2. Some new great-strength, high-temperature resistant metals can be formed only by ex plosive forming. in this report are included fundamental experiment about the under water explosive metal forming. That is, the relation between peak explosive pressure and weight of explosive, or distance from explosive, or depth from water level are ob tained by copper cylinder-type pressure gauge. Then, cylindrical cups of 50 mm dia, 20, 30, 40 mm depth, have been formed under several conditions and the formablity of explosive forming are estimated from these results.View full abstractDownload PDF (6451K) -
Study on Carbide Milling (No. 1)Hidehiko TAKEYAMA, Akihito YAMADA1960 Volume 26 Issue 310 Pages 674-685
Published: November 05, 1960
Released on J-STAGE: June 30, 2009
JOURNAL FREE ACCESSThe final object of this study is to establish the operation standard of face milling with carbides in terms of tool life. As well known, milling process involves various complicated factors to govern the tool life, whereas most of them have not been clarified. In this report, the most suitable carbide grade, the best combination of tool shape, the effect of cutting speed, feed, depth of cut, engage angle and width of work material or frequency of shocks upon the tool life are investigated. It has been stressed that the feature of the tool wear in carbide milling is characterized by the fact that the shock against the tool tip due to the engagement with work material plays an important role in the process of the tool wear, whereas the temperature plays only a minor role. Summarizing the test results, it can be concluded that the key point of face milling with carbides is how to prevent chipping from every standpointView full abstractDownload PDF (9231K) -
Toshio SATA, Kazuyoshi AMANO1960 Volume 26 Issue 310 Pages 686-690
Published: November 05, 1960
Released on J-STAGE: February 16, 2010
JOURNAL FREE ACCESSIn this paper roughness of machined surface is examined with increasing wear of cutting tool. With proceeding of cutting, the surface roughness is increased in the following two manners, that is, increase in height of feed mark of the surface, and then increase in irregularity of feed marks. The former is attributed to the variation of tool shape by flank wear, and the latter to increase of vibration during cutting. Then it is found that increase of the surface roughness shows good correlation with progression of flank wear. Ceramic tools are ascertained to cut better surface than carbide tools, owing to less flank wear.View full abstractDownload PDF (3058K) -
Hiroyuki YOSHIKAWA1960 Volume 26 Issue 310 Pages 691-700
Published: November 05, 1960
Released on J-STAGE: June 30, 2009
JOURNAL FREE ACCESSThe theory of fracture in brittle materials is applied to the analysis of the wear of grinding wheels. The wear of grinding wheels includes three kinds of process : the fracture of bond posts, the fracture of grains and the abrasive wear of grains, while the present discussions are concerned with the case where the first two kinds are predominant. The theoretical analysis predicts the characteristic dependence of the wear rate and the size distribution of wear fragments on the grinding force and the bonding-strength of grinding wheels. The predictions are almost supported by the experiments on grinding wheels of different grades.View full abstractDownload PDF (1647K) -
1960 Volume 26 Issue 310 Pages 705-708
Published: November 05, 1960
Released on J-STAGE: June 30, 2009
JOURNAL FREE ACCESSDownload PDF (723K)
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