All issues
Volume 29, Issue 346
Displaying 1-6 of 6 articles from this issue
- |<
- <
- 1
- >
- >|
-
Theory of crater depth by stationary and moving electrode in single dischargeNobuaki HACHINOHE1963 Volume 29 Issue 346 Pages 841-852
Published: November 05, 1963
Released on J-STAGE: June 30, 2009
JOURNAL FREE ACCESSIn order to clarify the machining process in electric discharge grinding, the author analysed the crater depth and profile under the assumption of instantaneous plane heat source.
The formula which gives the depth of the crater made by the stationary electrode showed quantitatively the effects of discharge voltage Vco, condenser capacity C in discharge circuit, line inductance L and line electric resistance re. Experimental results obtained were consistent with the tendency predicted by the formula.
In the case of moving electrode a modified analysis of the crater depth was carried out, and the profiles of the crater determined by numerical calculations were found to be similar to the experimental ones.View full abstractDownload PDF (3329K) -
Tomokazu ARAI, Keizo MORISHITA1963 Volume 29 Issue 346 Pages 853-860
Published: November 05, 1963
Released on J-STAGE: June 30, 2009
JOURNAL FREE ACCESSThe first part of this paper describes an explorative circuit system functioning as a highly stabilized and sensitive reactance meter with a wide range of application in various fields of scientific research and industrial operation. With a measuring range of 10-3 to 10+6 pF, it has a sensitivity of 7.6 μA/0.001 pF when measured through an ammeter with a full scale of 100 μA, and a stability of less than 1 μA in terms of zero drift lasting several hours.
The latter part treats the cases where the reactance meter is utilized in measuring the surface fluctuation of the grindstone for a tool grinding machine. For that purpose the surface fluctuation is converted into the change of capacitance by varying the separation of parallel-plate condensers. This non-contact method enables measurements of surface fluctuation to less than several microns. The static and dynamic characteristics of surface fluctuation being investigated through the reactance meter, their differences as well as the optimum measuring conditions are confirmed therewith.View full abstractDownload PDF (4942K) -
Non-steady state of cutting in tool engagementEiji USUI, Kazuyuki KIKUCHI, Suketoshi KISHIGAMI1963 Volume 29 Issue 346 Pages 861-870
Published: November 05, 1963
Released on J-STAGE: June 30, 2009
JOURNAL FREE ACCESSThe theory of plasticity applied to the non-steady plastic flow produced by a cutting edge which is engaged paralell to the side of a workpiece is proposed. The theory is veri-fied to be in good agreement with the experimental results in slow speed machining.
The friction characteristics and the coefficient of friction on the rake face in slow speed machining is discussed in conjunction with the slip line construction of the plastic field whithin the chip.
The plastic deformation in discontinuous chip formation appears to be analogous to the non-steady flow in the edge engaging.View full abstractDownload PDF (7490K) -
Hisashi WADA1963 Volume 29 Issue 346 Pages 871-878
Published: November 05, 1963
Released on J-STAGE: June 30, 2009
JOURNAL FREE ACCESSA narrow fringe can be observed by multiple beam interference transmitted in the replica from a surface to be measured.
Two methods to obtain a narrow fringe are described in this paper.
One of these methods is based upon microinterferometry of dividing amplitude of rays incident upon 3 series of mirrors with reflective and transmissive fraction which are set to be parallel with each other.
The other method is based upon ordinary multiple beam microinterferometry of two mirrors system.
These fringes observed are sharper than cos2 type fringes of transmitted type two beam microrinterferometer.
The fringe spacing is accepted to be equivalent to λ/2 (n1-n2), (λ is the wave length of the monochromatic light employed, n1 is the refractive index of the replica, and is covered with the refractive index n2) in this experiment, n2 is equal to 1.000 (air).View full abstractDownload PDF (9375K) -
Fundamentals of Hydrospark FormingKeiji OKUSHIMA, Katsundo HITOMI, Tomoichi INOUE, Masami OMORI1963 Volume 29 Issue 346 Pages 879-884
Published: November 05, 1963
Released on J-STAGE: February 15, 2010
JOURNAL FREE ACCESSIn order to effectively measure mechanical energy converted from electrical energy associated with hydrospark, the shooting type device for output measurement was made and used. This consists of the electrical discharge device and the gun type barrel. The whole equipment is filled with water. A steel ball is put on the outlet of the barrel and shot with mechanical energy produced by hydrospark. This mechanical energy converted from electrical energy stored in the capacitor bank is calculated from data for the flight distance and the mass of the steel ball.
The shape of electrode and kinds of liquid affecting mechanical output were investigated with this device. It was found that flat electrode was stabler than conical electrode. The largest mechanical output was obtained with oil for transformer. It was about three times larger than that with water.
It was also found that the most suitable electrode distance exists in relation to kinds of liquid and discharge conditions.View full abstractDownload PDF (5848K) -
1963 Volume 29 Issue 346 Pages 898-901
Published: November 05, 1963
Released on J-STAGE: June 30, 2009
JOURNAL FREE ACCESSDownload PDF (867K)
- |<
- <
- 1
- >
- >|