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Volume 51, Issue 5
Displaying 1-32 of 32 articles from this issue
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[in Japanese]1985 Volume 51 Issue 5 Pages 885-890
Published: May 05, 1985
Released on J-STAGE: June 30, 2009
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[in Japanese]1985 Volume 51 Issue 5 Pages 891-896
Published: May 05, 1985
Released on J-STAGE: June 30, 2009
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[in Japanese]1985 Volume 51 Issue 5 Pages 897-901
Published: May 05, 1985
Released on J-STAGE: June 30, 2009
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[in Japanese]1985 Volume 51 Issue 5 Pages 902-905
Published: May 05, 1985
Released on J-STAGE: June 30, 2009
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[in Japanese]1985 Volume 51 Issue 5 Pages 906-910
Published: May 05, 1985
Released on J-STAGE: June 30, 2009
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[in Japanese]1985 Volume 51 Issue 5 Pages 911-915
Published: May 05, 1985
Released on J-STAGE: June 30, 2009
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[in Japanese], [in Japanese]1985 Volume 51 Issue 5 Pages 916-919
Published: May 05, 1985
Released on J-STAGE: June 30, 2009
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[in Japanese], [in Japanese], [in Japanese]1985 Volume 51 Issue 5 Pages 920-926
Published: May 05, 1985
Released on J-STAGE: June 30, 2009
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[in Japanese]1985 Volume 51 Issue 5 Pages 927-932
Published: May 05, 1985
Released on J-STAGE: June 30, 2009
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[in Japanese]1985 Volume 51 Issue 5 Pages 933-936
Published: May 05, 1985
Released on J-STAGE: February 16, 2010
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[in Japanese]1985 Volume 51 Issue 5 Pages 937-941
Published: May 05, 1985
Released on J-STAGE: June 30, 2009
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[in Japanese]1985 Volume 51 Issue 5 Pages 942-947
Published: May 05, 1985
Released on J-STAGE: February 16, 2010
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[in Japanese]1985 Volume 51 Issue 5 Pages 948-952
Published: May 05, 1985
Released on J-STAGE: June 30, 2009
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[in Japanese]1985 Volume 51 Issue 5 Pages 953-956
Published: May 05, 1985
Released on J-STAGE: June 30, 2009
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[in Japanese]1985 Volume 51 Issue 5 Pages 957-963
Published: May 05, 1985
Released on J-STAGE: June 30, 2009
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[in Japanese]1985 Volume 51 Issue 5 Pages 964-970
Published: May 05, 1985
Released on J-STAGE: June 30, 2009
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Haruhisa KAWASAKI, Mituo NAKAGAWA, Kunitoshi NISHIMURA1985 Volume 51 Issue 5 Pages 977-983
Published: May 05, 1985
Released on J-STAGE: June 30, 2009
JOURNAL FREE ACCESSThe dynamics of a mechanical manipulator are characterized by strong non-linearity and dynamic coupling between the joint motions. Accordingly, a computed torpue method in which the control input is the motor drive torque computed for a desired arm trajectory is effective in precise trajectory control. Such a method requires calculation of both joint general- ized torque and motor generalized torque. It also requires that friction loss in the torque transfer system be taken into account. This paper presents a dynamic equation that takes into account friction loss and is based on the Lagrangian method. Moreover, an effective computa-tion method for motor generalized torque is also shown using coordinate systems assigned to the link and the motor. The effectiveness of this computed torque method is verified using experimental results obtained for a five-degree-of-freedom manipulator.View full abstractDownload PDF (1084K) -
1985 Volume 51 Issue 5 Pages 983
Published: 1985
Released on J-STAGE: June 30, 2009
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Hisashi WADA, Hideo SAKUMA, Koichi TABE1985 Volume 51 Issue 5 Pages 984-989
Published: May 05, 1985
Released on J-STAGE: June 30, 2009
JOURNAL FREE ACCESSHeterodyne moiré method is applied to the displacement measurement of the interference fringes, which act as the normal lines in the straightness measurement. As the phase difference of the moiré fringes is detected that are transformed into time frequency by the tranferring reference grating with a constant speed, the measurement is done with short time and high accuracy, and also continuously. Further, it is confirmed that the flutter of the laser beam can be controlled by sending the air flow to the beam.View full abstractDownload PDF (3489K) -
Yasuo YOKOYAMA, Sakiichi OKABE, Akira SHIOZAWA, Motoji WATANABE1985 Volume 51 Issue 5 Pages 990-996
Published: May 05, 1985
Released on J-STAGE: June 30, 2009
JOURNAL FREE ACCESSThe balanced vibratory feeder is originally developed to improve defects of ordinary vibratory feeder, especially the stability, efficiency and vibration prevention. The balanced vibratory feeder is made up of two sets of tracks which are arranged in parallel or coaxial manner and vibrated each other in opposite phase. The vibration system of the balanced feeder is consisted in three-degrees-of-freedom. The vibration characteristic, however, shows that which is named as the quasi-one-degree-of-freedom effect. The vibratory conveying efficiency is also high through its unique mechanism. The balanced feeder is able to set anywhere, floor or wall etc. and also able to accumulate without vibration interference, for example, multi-layer bowl feeder, multi-store bowl feeder, side-mounted linear feeder and so on, because the base of balanced vibratory feeder is prevented from vibration and isolated with foundation. The balanced vibratory feeder is also utilizable for the multi-tracks parts orienting system owing to its stability and high efficiency. The system is consisted by linear feeders and therefore its orienting devices are able to machine in high accuracy, that is caused to increase the reliability of parts orienting and feeding.View full abstractDownload PDF (6886K) -
[in Japanese], [in Japanese], [in Japanese]1985 Volume 51 Issue 5 Pages 997-999,1074
Published: May 05, 1985
Released on J-STAGE: June 30, 2009
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Kyoji HOMMA, Katsumi KANEKO1985 Volume 51 Issue 5 Pages 1000-1006
Published: May 05, 1985
Released on J-STAGE: June 30, 2009
JOURNAL FREE ACCESSThe subcritical crack growth of macroscopic cracks in vitrified grinding wheels was examined using double torsion specimen. The relations between crack velocity 'v'if and stress intensity 'K' for wheels with different grain sizes were investigated. These data provided the linear correlation in plot of log v vs. log K until sufficiently slow crack growth region. In one K-v data, the relation was logv=51.7logK-18.1
Assuming that the crack velocity is still being sufficiently lower region, expected lifetime 't'at a constant stress 'σ' can be derived as
t=2K2-n/πaf2(n-2)σ2
where a and n, and f are empirically determined constants, and geometric constant, respectively. The lifetime vs. applied stress diagrams in which K was taken as the parameter were obtained. Fracture toughness obtained by double torsion was confirmed to show slightly higher value than by four point bending.View full abstractDownload PDF (1054K) -
Takehiro WATANABE, Chikara SHIMO1985 Volume 51 Issue 5 Pages 1007-1012
Published: May 05, 1985
Released on J-STAGE: June 30, 2009
JOURNAL FREE ACCESSThis paper deals with the observation of fundamental processing mechanism by YAG laser irradiation on SUS 304. The processes are investigated by measuring the drilled depth and melted depth. The behavior of melt is discussed by observing the reflected laser light from the surface of workpiece and the transmitted laser light through the irradiated part. The obtained main results are as follows : (1) Melting and removing processes of metal are classified into four types (non-melt type, melt type, removal type, and mix type of melt with removal) according to the power density. (2) The maximum depth of hole (hm) closely depends on the power density ( W) but not on the irradiation time so much. (3) The growing process of melted zone and the removing mechanism of molten material are explained by models based on the experimental results.View full abstractDownload PDF (1099K) -
Tsuneo HAMAGUCHI1985 Volume 51 Issue 5 Pages 1013-1018
Published: May 05, 1985
Released on J-STAGE: June 30, 2009
JOURNAL FREE ACCESSAn etching technique for obtaining a silicon wafer with very little thickness variation is described in this paper. The etchants used in this experiment consist of nitric acid, hydrofluoric acid and diluents, such as water and glacial acetic acid. Rate limiting processes are segregated into two categories, one is the diffusion-rate-limiting process, where the etching rate is affected by etchant agitation. The other is the reaction-rate-limiting process, which is scarcely affected by etchant agitation. As a result, etching in the reaction-rate-limiting process can easily result in extremely smaller wafer thickness variation, about 1 μm, than that by diffusion-rate-limiting process. Furthermore, water ratio to nitric acid is an important factor to determine the category in which the rate-limiting process is classified.View full abstractDownload PDF (2610K) -
In Drilling Workpieces with Prebored HolesHiromichi ONIKURA, Keizo SAKUMA, Toshihiko MATSUZAKI, Akio KATSUKI1985 Volume 51 Issue 5 Pages 1019-1024
Published: May 05, 1985
Released on J-STAGE: February 16, 2010
JOURNAL FREE ACCESSThe purpose of this paper is to clarify the mechanism of drill walking phenomenon. The stability of drill motion is analyzed, by considering the regenerative effect, the dynamic cutting force and the variation of undeformed chip thickness in the primary cutting direction. The results are compared with the experimental results. In the theoretical analysis, a Nyquist's chart of the drill system shows that the vibration frequency per revolution of workpiece is almost an odd number with a phase lag which causes a clockwise rifling mark on the hole wall. Experiments give similar results. Theory and experiments show that decreasing the feed rate, increasing the bending stiffness of a drill and decreasing the equivalent mass of tool result in an increase in the vibration frequency per revolution of workpiece. Therefore, drill walking is a kind of regenerative chatter vibration.View full abstractDownload PDF (1079K) -
Prediction of Tool WearKatsuhiro MAEKAWA, Takeaki KITAGAWA1985 Volume 51 Issue 5 Pages 1025-1032
Published: May 05, 1985
Released on J-STAGE: February 16, 2010
JOURNAL FREE ACCESSThis paper describes details of a prediction system of tool wear. The system is based on the wear characteristic equation and the three-dimensional cutting model relating to formation of a lateral curl of chip which have been proposed in the previous papers. The prediction method yields not only tool rake and flank wears but also distributions of temperature and stresses on the worn surfaces under arbitrary tool geometry and cutting conditions, provided that basic information, such as orthogonal cutting data, thermal properties, constants in the wear characteristic equation is in hand. The tool wear configuration, wear progress curves, tool face temperature, etc. thus predicted are in reasonable agreement with the experimental ones. The reason that the wear at the corner part decreases when turning 18% Mn steel with tools having a relatively large corner radius is due to the temperature drop which is mainly caused by the decrease in the undeformed chip thickness at the corner part with increasing corner radius.View full abstractDownload PDF (1367K) -
Consideration of Machining Property by Motion Analysis of Powder Particle in FluidYuzo MORI, Toru OKUDA, Kazuhisa SUGIYAMA, Kazuto YAMAUCHI1985 Volume 51 Issue 5 Pages 1033-1039
Published: May 05, 1985
Released on J-STAGE: June 30, 2009
JOURNAL FREE ACCESSThe present research aims to realize the numerically controlled ultra-precision machning which can easily finish the work into a required shape by a single apparatus, utilizing the elastic fracture of the order of atomic size. Ultra fine powder particles and water are mixed, and making the rotating sphere of polyurethane rubber approach to the material surface, the state of fluid lubrication of the mixed fluid is realized, so that powder particles in the mixed fluid are made to collide with the surface. Then the elastic fracture of atomic size is achieved. In this report, utilizing the analysis of fluid movement which was introduced in the previous report, the movement of powder particles is calculated. The following results are obtained. (1) The work is machined by the interaction between powder particles and work, and this report shows theoretically and experimentally that the machining characteristics are influenced by the interaction. (2) Furthermore this report shows the effects of thermal change and powder concentration of the mixed fluid on the stock removal theoretically and experimentally.View full abstractDownload PDF (1313K) -
Kimiyoshi DEGUCHI, Nobuyuki TAKEUCHI, Hiroo KINOSHITA1985 Volume 51 Issue 5 Pages 1040-1046
Published: May 05, 1985
Released on J-STAGE: June 30, 2009
JOURNAL FREE ACCESSIn order to evaluate the aligner of X-ray lithography system SR-1 developed for the replication of submicron features, mark detecting characteristics and overlay accuracy have been investigated. The results are summarized as follows : (1) The detecting characteristics of the wafer marks under transparent layers are affected by interference, which depends on the refractive index and thickness of the layers. Improvements for the mark detecting characteristics have been investigated. (2) Overlay accuracies of less than 0.08 μm (σ) have been achieved for various conditions of the wafer marks. (3) From the differences in overlay accuracy between the center and the edge of the exposure site, the standard deviations of the runout error and the proximity gap change have been estimated to be less than 0.037 μm (σ) and 0.65 μm (σ), respectively.View full abstractDownload PDF (1209K) -
Akira KYUSOJIN, Kazunori OGAWA, Akira TOYAMA1985 Volume 51 Issue 5 Pages 1047-1052
Published: May 05, 1985
Released on J-STAGE: June 30, 2009
JOURNAL FREE ACCESSIt is usual to support the workpiece by dead centers in high precision cylindrical grinding. The workpiece is rotated as a guide to the contacting parts between centers and center holes. Some experiments were performed on the roundness of ground cylindrical surface, the effect of roundness of the center holes and the mis-alignment of the centers. Furthermore, the ball center, which has been used in the precision instrumentation, was applied to the cylindrical grinding experiments. As a result, it becomes clear that the roundness of the center holes affects the roundness of the ground surface, especially with some mis-alignment between centers. The ground surface, in the side of tail stock, was more badly influenced. The out-of-roundness of the ground surface was within 0.5μm with ball center, while 1/10 of the out-of-roundness of the center holes with cone center. The ball center is vulnerable, so suitable lubrication was necessary.View full abstractDownload PDF (936K) -
Kazuhiro SHINTANI, Yoshio FUJIMURA1985 Volume 51 Issue 5 Pages 1053-1059
Published: May 05, 1985
Released on J-STAGE: June 30, 2009
JOURNAL FREE ACCESSOn the fine turning as a substitute for grinding, the optimum geometry of CBN tool is suggested from the view-points of tool wear and surface finish. In this test, Cr-Mo steel bar carburized and hardened was cut at cutting speed of 1.67 m/s, cutting depth of 0.1 mm and feed rate of 0.1 mm/rev. And, tool geometry was varied at negative land angle NL, nose radius rnand honing radius rH. The results are as follows : (1) Cutting performance is best at NL from 30° to 35°. The land width is desirable to be taken larger than tool-chip contact length. (2) rn of 0.8 mm brings longer life from the stand point of surface roughness. (3) rH of 0.05 mm is recommended in order to remove fully the grinding scratch. (4) Flank wear rate is accelerated by occurrence of cutting edge chipping often resulting from welding.View full abstractDownload PDF (6377K) -
Toyoshiro INAMURA, Takeshi YASUI, Toshiaki MISAWA, Masakazu WATANABE, ...1985 Volume 51 Issue 5 Pages 1060-1067
Published: May 05, 1985
Released on J-STAGE: June 30, 2009
JOURNAL FREE ACCESSA new method which utilizes a geometric error model of a machine-tool structure is proposed for static accuracy test of a machining center. The model is based on a vector representation of machine-tool structural configuration, in which the geometric errors are represented by linear transformations between the vectors attached to each component of the structure. The model enables one to relate the geometric errors of each structural component to the resultant cutting point error and can be used to simulate the accuracy measurement test by a laser interferometer and a master block. This simulation gives the way how to process the measured data to obtain the fundamental values which compose the cutting point error. The measured data on a horizontal type machining center are then processed according to the method to make clear the erroneous motion of the structural components and also to give the contour map representation of the cutting point error and its variance in the cubic work zone of the machining center.View full abstractDownload PDF (1322K) -
Truing Effect of Crushing on the Wheel Profile AccuracySeiki MATSUI, Jun-ichi TAMAKI1985 Volume 51 Issue 5 Pages 1068-1073
Published: May 05, 1985
Released on J-STAGE: June 30, 2009
JOURNAL FREE ACCESSFor the purpose of clarifying the truing effect of crushing, crush roll wear rate during crushing and grinding wheel wear caused by grinding are measured for various crushing conditions by controlling the sliding speed between crush roll and grinding wheel. Results are as follows : (1) Crush roll wear rate increases with an increase in the sliding speed, and decreases with an increase in the crush roll infeed rate when the sliding speed is constant. (2) Rate of grinding wheel wear caused by grinding increases with an increase in the crush roll infeed rate per one revolution of grinding wheel, and becomes smaller when the sliding speed increases. (3) An averaged value of the sliding speed over the crush roll profile can be minimized by shifting the rolling pitch point between grinding wheel and crush roll to an optimum position with a forcible manner, and this results in the improvement in grinding wheel profile accuracy. Furthermore, it is revealed that an application of creep feed grinding onto the crush formed grinding wheel contributes to the improvements in grinding wheel wear rate, profile accuracy, and finished surface roughness as compared with conventional plunge grinding.View full abstractDownload PDF (1014K)
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