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Volume 51, Issue 7
Displaying 1-30 of 30 articles from this issue
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[in Japanese]1985 Volume 51 Issue 7 Pages 1285-1290
Published: July 05, 1985
Released on J-STAGE: June 30, 2009
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[in Japanese]1985 Volume 51 Issue 7 Pages 1291-1295
Published: July 05, 1985
Released on J-STAGE: June 30, 2009
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[in Japanese], [in Japanese]1985 Volume 51 Issue 7 Pages 1296-1302
Published: July 05, 1985
Released on J-STAGE: February 16, 2010
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[in Japanese], [in Japanese]1985 Volume 51 Issue 7 Pages 1303-1309
Published: July 05, 1985
Released on J-STAGE: June 30, 2009
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[in Japanese], [in Japanese]1985 Volume 51 Issue 7 Pages 1310-1313
Published: July 05, 1985
Released on J-STAGE: June 30, 2009
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[in Japanese], [in Japanese]1985 Volume 51 Issue 7 Pages 1314-1317
Published: July 05, 1985
Released on J-STAGE: February 16, 2010
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[in Japanese]1985 Volume 51 Issue 7 Pages 1318-1321
Published: July 05, 1985
Released on J-STAGE: June 30, 2009
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[in Japanese]1985 Volume 51 Issue 7 Pages 1322-1325
Published: July 05, 1985
Released on J-STAGE: June 30, 2009
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[in Japanese]1985 Volume 51 Issue 7 Pages 1326-1330
Published: July 05, 1985
Released on J-STAGE: June 30, 2009
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[in Japanese], [in Japanese]1985 Volume 51 Issue 7 Pages 1331-1335
Published: July 05, 1985
Released on J-STAGE: June 30, 2009
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[in Japanese]1985 Volume 51 Issue 7 Pages 1336-1339
Published: July 05, 1985
Released on J-STAGE: June 30, 2009
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[in Japanese], [in Japanese], [in Japanese]1985 Volume 51 Issue 7 Pages 1340-1343
Published: July 05, 1985
Released on J-STAGE: June 30, 2009
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[in Japanese]1985 Volume 51 Issue 7 Pages 1344-1348
Published: July 05, 1985
Released on J-STAGE: June 30, 2009
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[in Japanese], [in Japanese]1985 Volume 51 Issue 7 Pages 1349-1353
Published: July 05, 1985
Released on J-STAGE: June 30, 2009
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[in Japanese]1985 Volume 51 Issue 7 Pages 1354-1359
Published: July 05, 1985
Released on J-STAGE: June 30, 2009
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System DevelopmentSuguru SAWAI, Juzo AKIYAMA, Makoto HOSHI, Norio OKINO, Yukinori KAKAZU1985 Volume 51 Issue 7 Pages 1363-1369
Published: July 05, 1985
Released on J-STAGE: June 30, 2009
JOURNAL FREE ACCESSSMDS which stands for Sony Mold Design Simulator has been developed as a part of an integrated CAD system for injection mold design. This paper describes the prototype system of SMDS, and some examples that are applied to the actual injection mold design are presented. SMDS has been developed to realize the system that can process the geometric data of a mold, based on CSG solid modeler TIPS-1 system. However, there are some future subjects, i.e., physical analysis, simulation of mold flow and so on. These problems should be solved using the model generated in SMDS in the near future. In SMDS, the process of mold design is done by interactive operations and several useful functions for mold design, i.e., shrinkage process, automatic generation of cavity and core, drafting process, and dimensioning and tolerancing, are prepared. Additionally, SMDS has an interface to a 2-D drafting system that can generate complete drafts using interactive operations.View full abstractDownload PDF (1060K) -
Super Precision Control of Oil Temperature Using Temperature Fluctuation AbsorptionJunji CHIGIRA, Hideshi SUZUKI, Yoshiaki KAKINO1985 Volume 51 Issue 7 Pages 1370-1376
Published: July 05, 1985
Released on J-STAGE: February 16, 2010
JOURNAL FREE ACCESSSuper precision control of oil temperature is essential to obtain thermal stability required in super precision machining. For this purpose, two types of temperature control have been used ; PID control and multi-stages ON-OFF control. The former requires a preliminary temperature control of ±0.1°C prior to the main control, and frequency of temperature fluctuation must be over 1 h. The latter requires at least two system of ON-OFF control, and flow rate of controlled element must be set large, causing increase in the size of set-up and its total cost. In this study ON-OFF control is combined with an absorber which damps the temperature fluctuation from ON-OFF control. This system requires only a single step of ON-OFF control, and far more inexpensive than PID control system ; moreover huge tanks are not needed. Based upon theoretical analyses, super precision control system of oil temperature has been constructed and its performances have been tested. As the results, the temperature fluctuation was kept less than 0.014°C and drift of temperature during continued operation was only about 0.006°C/h. Key words : machine tools;super precision temperature control;temperature fluctuation absorptionView full abstractDownload PDF (1232K) -
Teru HAYASHI, Iwao HAYASHI, Yoshihiro NAKAJIMA, Zhi-hua ZHANG, Shoichi ...1985 Volume 51 Issue 7 Pages 1377-1382
Published: July 05, 1985
Released on J-STAGE: February 16, 2010
JOURNAL FREE ACCESSThe mechanical and electrical characteristics of the PMN ceramic based piled actuator are studied : the stiffness of the actuator is influenced by the finishing accuracy of the disc element and the thickness and Young's modulus of the electrode material, the electrostrictive characteristics of the piled actuator is equal to the sum of the one of disc element, the actuator has the most suitable bias voltage at which it has the largest piezoelectric constant. As the result, the actuator can be used for compensating the errors of hobbing machine.View full abstractDownload PDF (2947K) -
Dispersion of Tightening Axial Force and Safety against FatigueNobutoshi OHASHI, Masaya HAGIWARA, Isamu YOSHIMOTO1985 Volume 51 Issue 7 Pages 1383-1389
Published: July 05, 1985
Released on J-STAGE: June 30, 2009
JOURNAL FREE ACCESSIn the first part of this study, the tightening experiments are performed with emphasis on an evaluation of tightening characteristics using threaded fastener tightening test machine. As a result of the above experiment, the coefficient of variation in the distribution of axial force by the torque gradient control method which tightens bolts up to the limit of elasticity is found to be about one-third of that obtained by the torque control method which tightens bolts in the elastic region. Secondly, the fatigue tests are performed with the bolted joint of two cylinders tightened by the elastic limit tightening or by the elastic region tightening. It is confirmed that the bolted joint tightened to the limit of elasticity has the better safety against fatigue than that tightened in the elastic region by the torque control method.View full abstractDownload PDF (1197K) -
Cutting Resistance Analysis of DrihaAkiyoshi KOBAYASHI, Shonoshin FUJIYOSHI, Shohachi SHIMIZU1985 Volume 51 Issue 7 Pages 1390-1395
Published: July 05, 1985
Released on J-STAGE: February 16, 2010
JOURNAL FREE ACCESSIn this paper, cutting characteristics of a new rotary cutting tool "driha" are analyzed theoretically and examined experimentally. This tool can perform smoothly both cuttings of drilling and cutting out of board materials by hand work. As a result, it is clarified that the cutting characteristics of driha can estimate quantitatively by considering both resistances of chip formation by cutting edge and interference between cylindrical land of driha and workpiece, and are remarkably influenced by the interference resistance between cylindrical land of driha and workpiece.View full abstractDownload PDF (1100K) -
Self Flushing MethodTakahisa MASUZAWA, C. J. HEUVELMAN1985 Volume 51 Issue 7 Pages 1396-1402
Published: July 05, 1985
Released on J-STAGE: June 30, 2009
JOURNAL FREE ACCESSThis paper deals with a new flushing method for EDM diesinking. A self flushing (SF) system which is based on the pumping effect by a special movement of the electrode is proposed to improve the flushing efficiency. A prototype system is developed and tested on its effectiveness. The result shows the superiority of this method to conventional lifting method especially in the stability of machining and consequently in the productivity. This SF method can easily be applied on a machine which supports a planetary movements.View full abstractDownload PDF (1266K) -
Feed Hole Strength, Punching Load and Burst StrengthHiroshi KAMADA, Kazuo MATSUNAGA, Akira SAKAMOTO1985 Volume 51 Issue 7 Pages 1403-1408
Published: July 05, 1985
Released on J-STAGE: June 30, 2009
JOURNAL FREE ACCESSThe relationship between paper physical properties and processing characteristics which are feed hole strength, punching load and burst strength, is studied. The main results obtained are summarized as follows : (1) Feed hole strength, punching load and burst strength are depended on increase in basis weight of paper and processing speed. (2) To the feed hole strength, the contribution of tensile strength and tear strength of paper is nearly equal. (3) Punching process of paper is distinguished into compressing and shearing process. The paper shear resistance value is from 70° to 90° MPa. (4) Burst strength depended on tip angle made of bursting blade and paper path, is decreased with reduction of tip angle up to 70°. Practical burster is adopted 72° on tip angle, and accomplished highly reliability.View full abstractDownload PDF (887K) -
Cylindrical Plunge Grinding of Stainless SteelsMamoru NAKAYAMA, Katsuhisa KUDO, Kentaro TAMAMURA, Katsuhiko IKEDA1985 Volume 51 Issue 7 Pages 1409-1413
Published: July 05, 1985
Released on J-STAGE: June 30, 2009
JOURNAL FREE ACCESSEffects of extreme-pressure additives in grinding oils were investigated experimentally in cylindrical plunge grinding of stainless steels of SUS 304 and SUS 440 C. Sulfur was found to be the most effective in improving the grinding ratio. Then tricesyl phosphate (TCP) and chlorinated paraffin were effective in that order. In the case of SUS 304, none of them could prevent the work material from adhesion to the grinding wheel surfaces and the degree of adhesion was severe according to increase in infeed rate of the wheel.View full abstractDownload PDF (2004K) -
Tentative Plan for Sliding BearingMasaki WADA, Makio MIZUNO1985 Volume 51 Issue 7 Pages 1414-1419
Published: July 05, 1985
Released on J-STAGE: June 30, 2009
JOURNAL FREE ACCESSAs a method for extending the life-time of the sliding bearing, to form continuously solid lubricant layer on the frictional surface may be taken into consideration. Therefore, this paper describes on the effects of the solid lubricants upon the coefficient of friction and wear properties of sliding bearing materials. This effects are measured at sliding speeds under various lubrication conditions by a cross bar type testing machine. Three kinds of solid lubricants, such as molybdenum disulfide (MoS2), graphite, and polytetrafluoroethylene (PTFE), are used for two cases of study, 1) in case of lubricating mixtures of powder with a white oil, 2) or, in case of forming the layer by pushing pellet of solid lubricants on the frictional surface of rotating specimen with pouring the white oil. The results obtained are as follows : (1) Under pouring white oil, the coefficient of friction is not so much affected by existence of solid lubricants. (2) As to effects of wear-resistance, PTFE is quite effective regardless of the applied types of the powder or pellet. (3) However, as for MoS, and graphite, wear-resistance is effected greatly when powder was used at low speed, and pellet was used at high speed.View full abstractDownload PDF (3382K) -
Hidehiko MAEHATA, Hiroshi KAMADA, Masahiko YAMAMOTO1985 Volume 51 Issue 7 Pages 1420-1427
Published: July 05, 1985
Released on J-STAGE: June 30, 2009
JOURNAL FREE ACCESSUsing the Electrolytic-abrasive Mirror Finishing Method, a large area of stainless and ordinary carbon steel works can be easily mirror-finished in a short time and with high efficiency up to a surface roughness of 0.01-0.02 μmRz. This method is based on the fact that the electrolytic effect is assisted by the removing section of abrasive grains within an appropriate current density range by using of neutral salt type electrolytes. This paper, first of all, clarifies combined effect of the electrolytic dissolution and polishing action of abrasive grains in this method. Furthermore it describes results of the experimental analysis on surface shape of the machining process and the formation mechanism of surface roughness.View full abstractDownload PDF (2910K) -
Takeshi YASUI, Akio SATO, Toyoshiro INAMURA1985 Volume 51 Issue 7 Pages 1428-1434
Published: July 05, 1985
Released on J-STAGE: June 30, 2009
JOURNAL FREE ACCESSThe mechanism to cause curved profile of cut surface in band sawing is studied from both analytical and experimental points of view. The simulation model is built taking into account the guide error of the bandsaw blade, the inequality of the sharpness and setting angle of the bandsaw teeth, the bending and torsion stiffness of the bandsaw blade and the thrust force per tooth per unit thickness, to show the validity of the model in explaining the curvature of cut surface. The discrepancy observed between the analytical and experimental results with regard to the effect of the guide error of the bandsaw blade is considered due to the neglect of the unstable state at the initial stage of cutting in the model. Finally the attachment which enables one to adjust the guide angle of the bandsaw blade is proved effective in reducing the undesirable curvature of cut surface.View full abstractDownload PDF (2907K) -
Kenji KOUNOSU1985 Volume 51 Issue 7 Pages 1435-1440
Published: July 05, 1985
Released on J-STAGE: June 30, 2009
JOURNAL FREE ACCESSIn external cylindrical traverse grinding of a slender workpiece, intermittent grinding phenomena that the workpiece is separated partially from the wheel during cutting can be frequently observed. The cause for the phenomena is considerably influenced the thermal deformation of the workpiece. This paper deals with the experimental and analytical investigation of the temperature distribution on the workpiece. The obtained results are as follows: (1) Temperature rise of the workpiece depends on the grinding condition. (2) The propriety of proposed calculation model is confirmed experimentally. (3) Temperature rise is not uniform on workpiece while rising whirl motion.View full abstractDownload PDF (920K) -
Tomio MATSUBARA, Hiroshi MIZUMOTO, Hisataka YAMAMOTO1985 Volume 51 Issue 7 Pages 1441-1446
Published: July 05, 1985
Released on J-STAGE: June 30, 2009
JOURNAL FREE ACCESSA work regenerative chatter in plunge grinding is theoretically studied in this paper. A dynamic grinding force due to the penetrating volocity is derived from a simple basis of a constant volumetric grinding energy theorem for the work material. The contact behaviour between the surfaces of the grinding wheel and work is also included in the analysis and it is shown that each contact stiffness of the grinding wheel and work should be separately treated in the vibration system in plunge grinding. A new block diagram for the regenerative chatter in plunge grinding is introduced and the critical conditions for the chatter vibrations are discussed. The results obtained are as follows. The effects of a number of the grinding variables such as the structural dynamic stiffness, damping coefficient, the natural frequency, the volumetric grinding energy of the material, the plunge velocity, the diameter of the work and wheel, grinding width and the contact stiffness of the wheel and work, on the stability of the chatter are all calculated. The effects of the structural stiffness and the grinding width on the chatter are much different from the results expected in other investigations given by many researchers. The structural stiffness has only small effect on stabilizing the chatter at relatively large grinding width. The large grinding width may also cause to suppress the chatter.View full abstractDownload PDF (1048K) -
Relative Slip and Damping Characteristics of Turning Tools (2nd Report)Etsuo MARUI, Satoshi EMA, Shinobu KATO1985 Volume 51 Issue 7 Pages 1447-1452
Published: July 05, 1985
Released on J-STAGE: June 30, 2009
JOURNAL FREE ACCESSThis paper presents the experimental investigation on the contact rigidity between turning tool shank and the tool post. The obtained results are as follows : (1) The contact rigidity is influenced by the bending stiffness of tool shank, contact area in tool shank and the Vickers hardness number of shank material. (2) The effects of these parameters on the contact rigidity are estimated by brief empirical expressions. (3) The contact rigidity in the normal direction to the contact plane is susceptible to stronger influence from the bending stiffness of tool shank and that in the parallel direction to the contact plane is to the contact area in tool shank.View full abstractDownload PDF (765K) -
Evaluation of Fluid Film in the Gap of the Contact AreaToshio AKIYAMA, Junji SHIBATA, Sakae YONETSU1985 Volume 51 Issue 7 Pages 1453-1459
Published: July 05, 1985
Released on J-STAGE: February 16, 2010
JOURNAL FREE ACCESSIn this paper, the film thickness of grinding fluid actually existing in the micro-gap of the wheel-work contact area was investigated experimentally and effective delivery conditions of the grinding fluid were discussed. The results obtained here are summarized as follows : (1) The film thickness can be identified from measuring its electric resistance. (2) There exist two processes for carrying the fluid suppied from a nozzle into the wheel-work conatct area. They are (a) the fluid adheres on or permeates into the wheel and is carried into the contact area by the wheel rotation, (b) the fluid enters the contact area directly from the grinding nip. Though the latter process is generally far effective in comparison with the former one, the reverse is also possible depending on delivery conditions of the grinding fluid. (3) Most effective nozzle setting angles with various delivery conditions of the grinding fluid, such as nozzle setting position φ, flow rate Q, etc., were made clear.View full abstractDownload PDF (1492K)
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