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2006 JSPE Spring Meeting
Displaying 101-150 of 647 articles from this issue
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  • Development of a Laser–Guided Deep–Hole Measuring System
    Akio Katsuki, Hiroshi Murakami, Hiromichi Onikura, Takao Sajima
    Session ID: C47
    Published: March 05, 2006
    Released on J-STAGE: January 31, 2007
    DOIhttps://doi.org/10.11522/pscjspe.2006S.0.201.0
    CONFERENCE PROCEEDINGS FREE ACCESS
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    Until now, the autocollimation principle has been applied to the system to measure accuracies of a deep hole, and its accuracies have been evaluated. The measuring unit is installed in the front end of a laser–guided probe. The hole accuracies are measured by scanning the hole wall spirally. In this paper, using the basic experimental equipment that installs the jig with the measurement unit, both roundness and rotation angle of the main spindle are measured and discussed concerning measuring accuracies.
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  • Development of a Laser–Guided Deep–Hole Evaluating Probe
    Akio Katsuki, Hiromichi Onikura, Takao Sajima, Ji/Guao Zhen, Hyun/Koo ...
    Session ID: C48
    Published: March 05, 2006
    Released on J-STAGE: January 31, 2007
    DOIhttps://doi.org/10.11522/pscjspe.2006S.0.203.0
    CONFERENCE PROCEEDINGS FREE ACCESS
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    The probe is fablicated for measuring accuracies of extremely deep holes. Measuring unit, whichi is on the foward part of the probe, is equipped with a pentaprizm and stylus with a corner cube prism. The hole shape is detected by measuring movement of a stylus perpendicular to the hole wall using a laser interferometer. The hole shape is evaluated by scanning the hole wall spirally with the stylus. The laser interferometer is set in front of the probe, its laser beam is radiated toward the pentaprism of the measuring unit, deflected toward the corner cube prism. The beam refrected from the corner cube prism reaches the interferomete. The measuring unit can be exchanged for a counter–boring head of the laser–guided tool. Roundness and straightness of a deep hole are measured by the probe and compared to those measured by reliable measuring devices. Almost same accuracies can be obtained.
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  • Recent advances in ultrahigh precision machining technology for non–axis symmetric aspherical surfaces
    Yutaka Yamagata
    Session ID: C61
    Published: March 05, 2006
    Released on J-STAGE: January 31, 2007
    DOIhttps://doi.org/10.11522/pscjspe.2006S.0.205.0
    CONFERENCE PROCEEDINGS FREE ACCESS
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    [in Japanese]
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  • Wear properties of diamond tools in oxygen–free copper precision cutting
    Shu Yamaguchi, Tosiaki Kaneeda, Shoichi Simada, Masahiro Higuchi, Seii ...
    Session ID: C62
    Published: March 05, 2006
    Released on J-STAGE: January 31, 2007
    DOIhttps://doi.org/10.11522/pscjspe.2006S.0.207.0
    CONFERENCE PROCEEDINGS FREE ACCESS
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    It is proved that the tool wear can be suppressed by being lower oxygen partial pressure with a N2 gas atmosphere in oxygen–free copper ultraprecision cuttings by single crystal diamond tools. It is caused by reducing of the redox reaction between the diamond tool and the OFHC workpiece in the N2 gas atmosphere. Comparing with a natural single crystal diamond tool, the synthetic single crystal diamond tool which rarely contains nitrogen impurities has higher hardness and strength. Then the tool wear should be smaller than the natural one. N2 and O2 gas were blown toward to the cutting point during the precision turning. Effects of the N2 gas atmosphere on the tool life and the turned surface properties have been investigated. The differences in the tool life between a synthetic and natural tool were also analyzed.
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  • Influence of Nitrogen Impurity on Diamond Tool Wear
    Yoshinori Yamada, Masahiro Higuchi, Tomomi Yamaguchi, Shoichi Shimada, ...
    Session ID: C63
    Published: March 05, 2006
    Released on J-STAGE: January 31, 2007
    DOIhttps://doi.org/10.11522/pscjspe.2006S.0.209.0
    CONFERENCE PROCEEDINGS FREE ACCESS
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    it is generally said that the nitrogen impurities included in diamond are the cause of the instability of useful life of monocrystalline diamond cutting tool. However, it is not exactly clear how the nitrogen impurities relate to the resistance to failure. In this paper, the infrared absorption spectrum and the tool wear of the diamond tools were measured respectively, and the relation between them was examined. Although the resistance to wear decrease with the increase in nitrogen impurities, the resistance to chipping increases with the increase in platelet which can be detected by the absorption at 1369cm–1.Therefore, diamond tools of many platelets show the long life when cutting conditions are so heavy that chipping occurs frequently.
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  • Studies on the ultraprecision machining–induced subsurface damages
    Jiwang Yan, Tohru Asami, Nobuhito Yoshihara, Tsunemoto Kuriyagawa
    Session ID: C64
    Published: March 05, 2006
    Released on J-STAGE: January 31, 2007
    DOIhttps://doi.org/10.11522/pscjspe.2006S.0.211.0
    CONFERENCE PROCEEDINGS FREE ACCESS
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    Transmission electronic microscopy (TEM) and laser micro–Raman spectroscopy were used to examine the silicon substrates plunge–cut by a diamond tool under various conditions. The results showed that the surface layer was transformed to the amorphous structure, below which is a dislocation layer. The thickness of the amorphous layer increases as the depth of cut increases. Among three tool rake angles (–30, –45, –60 degrees), the –45 degree rake angle tool leads to the most significant amorphization. It was also indicated that there was a correlation between the Raman intensity ratio of the amorphous phase to the crystalline phase and the depth of the amorphous layer. This study provides the possibility of evaluating the subsurface damage layers quantitatively by micro laser–Raman.
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  • Polishing of Single Point Diamond Tool Based on Thermo–Chemical Reaction with Copper
    Tetsuya Izumi, Masahiro Higuchi, Tomomi Mamaguchi, Shoichi Shimada, Ka ...
    Session ID: C66
    Published: March 05, 2006
    Released on J-STAGE: January 31, 2007
    DOIhttps://doi.org/10.11522/pscjspe.2006S.0.213.0
    CONFERENCE PROCEEDINGS FREE ACCESS
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    The mechanical polishing of diamond cutting tools has the fault of generating micro cracks on the diamond surface. Therefore, the polishing based on thermo–chemical reaction has been discussed. A diamond specimen in contact with a copper was heated at the different temperature from 323K to 523K in air, and then the erosion rate and the change in its fracture strength were examined. Arrhenius plot of experimental results showed that the decrease in erosion rate was very linear with decrease in temperature. Moreover, the experimental results showed that the fracture strength increased finally although it decreased once as the heating time increased. Consequently, it is expected that the thermo–chemical polishing has the marked effect on the improvement of the resistance to wear.
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  • Ultra precision cutting of single crystal materials with diamond fly cutting
    Aya Nakagawa, Hirofumi Suzuki, Masahiro Yuuki, Yuji Yamamoto, Toshimic ...
    Session ID: C67
    Published: March 05, 2006
    Released on J-STAGE: January 31, 2007
    DOIhttps://doi.org/10.11522/pscjspe.2006S.0.215.0
    CONFERENCE PROCEEDINGS FREE ACCESS
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    In this report, ultra precision cutting of hard and brittle materials with diamond fly–cutting tool was newly proposed. In the proposed fly cutting method, the real depth of cut is much smaller than the apparent depth of cut. Therefore total cutting time can be reduced. And secondly, tool is rotating and then, workpiece form accuracy is independent of tool roundness and high accuracy could be obtained. Thirdly, interrupted cutting makes the tool edge temperature lower and tool wear will be reduced. Then large aspherical lenses of hard and brittle materials can be cut ultra precisely and efficiently.
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  • Development of ultra–precision machine for small–size lens mold machining
    Junqi Li , Qing Liu, Fumio Nakamura, Takeo Nakagawa
    Session ID: C68
    Published: March 05, 2006
    Released on J-STAGE: January 31, 2007
    DOIhttps://doi.org/10.11522/pscjspe.2006S.0.217.0
    CONFERENCE PROCEEDINGS FREE ACCESS
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    The ultra–precision machine for small–size lens mold machining has been developed. The developed machine uses linear guider as axel bearing, and is consisted of ultra–precision on machine measuring (OMM) system and ultra–precision CAM system. It combines ultra–precision diamond turning, grinding and on machine measuring functions in one machine in order to realize high–efficiency and ultra–precision machining of lens mold by using compensation function based on OMM result. According to experimental statistics, the ultra–precision and high–efficiency machining of small–size lens mold can be achieved by using this machine.
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  • Development of Cross and Pararell Mode Grinding Machine for High NA Aspherical Mold.
    Hirofumi Suzuki, Yuji Yamoto, Hirofumi Suzuki, Roblee Jeffrey, Tsutomu ...
    Session ID: C69
    Published: March 05, 2006
    Released on J-STAGE: January 31, 2007
    DOIhttps://doi.org/10.11522/pscjspe.2006S.0.219.0
    CONFERENCE PROCEEDINGS FREE ACCESS
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    Needs of the digital camera and the mobile phone with camera increase, and the necessity of a high NA asphere glass lens has risen in recent years. Such glass lens is molded by using ceramic mold of Tungsten carbide, and the ultra–precision aspherical grinding is important. Then, the cross and parallel mode grinding machine for the aspherical mold grinding was developed, and the grinding characteristics of was evaluated.
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  • Developement of Ultraprecision Profile Measuring Probe
    Sei Moriyasu
    Session ID: C78
    Published: March 05, 2006
    Released on J-STAGE: January 31, 2007
    DOIhttps://doi.org/10.11522/pscjspe.2006S.0.229.0
    CONFERENCE PROCEEDINGS FREE ACCESS
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    Profile measuring probes for optics require the structure to interfere the rotation of the axis. The square in the cross–section of the axis is used to interfere the rotation in the conventional probes, but the difficulty of fabricating this structure causes the increase of the cost. In this report, a new structure that interferes the rotation of the axis is proposed. In this structure, the center of the axis is deviated inside the air–bearing cylinder. The relation among the axis deviation length, the clearance of the air bearing and the rotation angle of the axis, is analyzed geometrically. And a profile measuring probe with this structure is constructed successfully.
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  • Proposal of Ultraprecision Wide–angle Profile Measuring Method with Slant Probe
    Sei Moriyasu
    Session ID: C79
    Published: March 05, 2006
    Released on J-STAGE: January 31, 2007
    DOIhttps://doi.org/10.11522/pscjspe.2006S.0.231.0
    CONFERENCE PROCEEDINGS FREE ACCESS
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    It is very difficult to measure the wide–angle profile precisely in the conventional way with the vertical probe. In this report, a new profile measuring methods with slant probes are proposed. The measuring area with a probe is limited within about 45 or 60 degrees, and a slant probe or multiple probes located in different angles are used. The multiple measured data are connected to evaluated the whole surface profile. The profile measurement on the machine with a slant probe is easier. The additional centering procedure or the additional evaluation of the attached angle of the probe is not necessary because the axis of the axis–symmetrical measured object and the axis of the rotation table are precisely overlapped.
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  • Fabrication and evaluation of coherent X–ray mirror optics
    Hidekazu Mimura, Hirokatsu Yumoto, Satoshi Matsuyama, Kazuya Yamamura, ...
    Session ID: C80
    Published: March 05, 2006
    Released on J-STAGE: January 31, 2007
    DOIhttps://doi.org/10.11522/pscjspe.2006S.0.233.0
    CONFERENCE PROCEEDINGS FREE ACCESS
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    [in Japanese]
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  • Precision Press Molding of Plastic Lens
    Hirofumi Suzuki, Akira Muramatsu, Yuji Yamamoto, Takeshi Kawano, Tadas ...
    Session ID: C81
    Published: March 05, 2006
    Released on J-STAGE: January 31, 2007
    DOIhttps://doi.org/10.11522/pscjspe.2006S.0.235.0
    CONFERENCE PROCEEDINGS FREE ACCESS
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    Plastic lenses are usually used in many kind of optical devices, such as CD/DVD pick–up, digital camera and projector and are generally mass–produced by the injection molding method with metal molds and dies because of its cheapness and higher productivity. Recently large diameter of plastic lenses is required for the rear projector lenses or mirrors. There are some problems in large plastic optics molding because of a weld line, large tact time and residual stress. In this paper, press molding method for large plastic lenses are proposed and the fundamental molding characteristic are experimentally investigated on the different molding conditions. Finally, in the aspheric molding experiments, the higher precise and clear lenses without the weld lines and lower residual stress are obtained.
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  • Study of the edge form of a end mill for aluminum alloys
    Tamotsu Arai, Koji Yokota, Manabu Nakashima, Tsutomu Oota, Tohru Sekig ...
    Session ID: D02
    Published: March 05, 2006
    Released on J-STAGE: January 31, 2007
    DOIhttps://doi.org/10.11522/pscjspe.2006S.0.237.0
    CONFERENCE PROCEEDINGS FREE ACCESS
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    Aluminum alloy is widely used as the lightweight parts for the satellite and aviation system equipment. However, manufacturing process is required high quality, and also high efficient to reduce the production cost. It means cut materials under high speed condition. This condition causes an increase of the cutting force and the chatter vibration in using a conventional end mill. On the other hand, a wider round width can decrease the chatter vibration. But it increases the cutting force according to the round width and area. This paper reports the round form to use under high efficient cutting condition. In this wave edge round form, the wider and thinner round edge repeat in a regular interval. As a result of carrying out these experiments, this form shows the ability to decrease both the cutting force and the chatter vibration.
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  • Study on High Speed Machining of Hardened Steel by Small Size Ball End Mill
    Hiroyasu Iwabe, Hisashi Endou, Kazuo Nakamoto
    Session ID: D03
    Published: March 05, 2006
    Released on J-STAGE: January 31, 2007
    DOIhttps://doi.org/10.11522/pscjspe.2006S.0.239.0
    CONFERENCE PROCEEDINGS FREE ACCESS
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    In this paper, the flank wear and the surface raghness of machined surface are investigated by high speed milling of hardened steel for a small size ball end mill. And it is investigated that the influence of tool life on the minimum quality lubrication(MQL) method and tool material. From results, it is shown that the long tool life and small surface roughness are obtained by down milling and the MQL method to end point of cutting. And it is shown that the rate of flank wear by the CBN tool is about one eighth compared with that by the carbide tool. Then it is cleared that very long tool life is obtained by the CBN tool.
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  • Development of Small Radius Ball End Mill for Deep Precision Machining
    Takeshi Akamatsu, Koichi Kitajima, Yuji Matsumoto, Tatsuya Kiriyama
    Session ID: D04
    Published: March 05, 2006
    Released on J-STAGE: January 31, 2007
    DOIhttps://doi.org/10.11522/pscjspe.2006S.0.241.0
    CONFERENCE PROCEEDINGS FREE ACCESS
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    [in Japanese]
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  • A Study on Estimation of Accuracy by Small Diameter End Mill Machining
    Naohito Toida, Yoshikazu Kobayashi, Kenji Shirai, Kouichi Tozawa
    Session ID: D05
    Published: March 05, 2006
    Released on J-STAGE: January 31, 2007
    DOIhttps://doi.org/10.11522/pscjspe.2006S.0.243.0
    CONFERENCE PROCEEDINGS FREE ACCESS
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    The purpose of this study is to enhance the high accuracy of machining process. In the machining process, an important point is to maintain the quality of the sample, and do a highly accurate machining as speedy as possible. Therefore, to ensure machining condition, it is necessary to do the machining and the measurement on some machining conditions, and do estimation. This research verifies the feature in the machining error from surface texture which machined by small diameter, and evaluates it for making to high accuracy.
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  • Control Technique of Surface Texture by End–Milling Process
    kogusu Shinichi, takakazu Ishimatsu, Yasuhiko Ogiya
    Session ID: D07
    Published: March 05, 2006
    Released on J-STAGE: January 31, 2007
    DOIhttps://doi.org/10.11522/pscjspe.2006S.0.245.0
    CONFERENCE PROCEEDINGS FREE ACCESS
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    Recently it is noticed that surface texture of products has some engineering availabilities. One important engineering problem is how to fabricate desired surface texture. In case of end–milling process, high feed cutting conditions generate typical surface textures. The resultant surface textures vary depending on the cutting conditions. In this report, a technique to estimate the surface texture generated by the end–milling process under high feed cutting condition is proposed. Estimated results are compared with experimental ones.
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  • Cutting Error Prediction in End Milling Considering Cutting Edge Roundness
    Jun'ichi Kaneko, Koji Teramoto, Kenichiro Horio, Yoshimi Takeuchi
    Session ID: D08
    Published: March 05, 2006
    Released on J-STAGE: January 31, 2007
    DOIhttps://doi.org/10.11522/pscjspe.2006S.0.247.0
    CONFERENCE PROCEEDINGS FREE ACCESS
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    This study deals with new prediction method for cutting error caused by tool deflection and instantaneous cutting force in ball end milling. In conventional prediction systems, process models without consideration about influences of cutting edge roundness, ″elastic recovery″ and ″ploughing″, were widely used. However, in finishing process, workpiece surface is often generated at moment when actual depth of cut is smaller than cutting edge roundness. This fact means that cutting error prediction for finish machining is required to consider these phenomena. So, in order to realize accurate prediction of instantaneous cutting force, we have proposed the new prediction model focused the effects of cutting edge roundness in former studies. In this paper, we mention about new simulation algorithm to adopt the proposed model to ball end milling. We develop a new simulation procedure and conduct experimental machining in order to verify the proposed procedure.
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  • [title in Japanese]
    Hirohisa Narita, Satoshi Kato, Lian–yi Chen, Hideo Fujimoto, Kei ...
    Session ID: D09
    Published: March 05, 2006
    Released on J-STAGE: January 31, 2007
    DOIhttps://doi.org/10.11522/pscjspe.2006S.0.249.0
    CONFERENCE PROCEEDINGS FREE ACCESS
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  • Development of Automatic Database Construction System of Cutting Procedures, Cutting Conditions, and Cutting Know–how on End Milling
    Kengo Nieda, Hideki Aoyama
    Session ID: D10
    Published: March 05, 2006
    Released on J-STAGE: January 31, 2007
    DOIhttps://doi.org/10.11522/pscjspe.2006S.0.251.0
    CONFERENCE PROCEEDINGS FREE ACCESS
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    A CAM system enables a non–professional operator to easily generate an NC program. However, it is still difficult to make an NC program which realizes optimum machining processes adapting cutting situations and specific characteristics of each machine tool. Cutting conditions are then changed on a shop floor by a skilled worker according to his/her experiences and intuitions. The objective of this study is to develop a system which automatically constructs a database in order to generate a high quality NC program realizing optimum machining processes. The database is constructed in relation to cutting blocks, cutting features, cutting methods and cutting conditions. These relationships are obtained by analyzing intensive NC programs and operation processes done by a skilled worker. By using constructed database, it is possible to generate a high quality NC program.
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  • Finite Element Analysis of the Residual Stresses of a Machined Two–Phase Alloy
    Yoshifumi Takemura, Toshiyuki Obikawa, Yasuhiro Kamata, Yasuhiro Akiya ...
    Session ID: D14
    Published: March 05, 2006
    Released on J-STAGE: January 31, 2007
    DOIhttps://doi.org/10.11522/pscjspe.2006S.0.253.0
    CONFERENCE PROCEEDINGS FREE ACCESS
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    The residual stresses in the machined surface layer are often critical to the strength. In the case of two phase alloys, the heterogeneous field of the residual stresses must affect it. Hence, a new finite element modeling is proposed to analyze and evaluate the residual stresses in the machined surface layer of two phase alloys. In this model, in order to simulate the chip separation during the cutting process, a part of elements in the workpiece is erased when the tool moves against the workpiece. The proposed finite element model is applied to the workpiece of carbon steels which are composed of ferrite and pearlite. The simulated and experimental results are compared and found to show good agreement. The large tensile residual stress on the machined surface appears on the pearlite area. The chip shape is complicated due to difference in the material properties between ferrite and pearlite.
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  • Study on Micro Milling of Metallic Glass
    Kosuke Komai, Noboru Morita, Shigeru Yamada, Noboru Takano, Tatsuo Ooy ...
    Session ID: D15
    Published: March 05, 2006
    Released on J-STAGE: January 31, 2007
    DOIhttps://doi.org/10.11522/pscjspe.2006S.0.255.0
    CONFERENCE PROCEEDINGS FREE ACCESS
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  • Cutting Performance of Traction Drive Speed Increasing Spindle
    Masashi Yamanaka, Shinji Miyamura, Katsumi Inoue
    Session ID: D16
    Published: March 05, 2006
    Released on J-STAGE: January 31, 2007
    DOIhttps://doi.org/10.11522/pscjspe.2006S.0.257.0
    CONFERENCE PROCEEDINGS FREE ACCESS
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    The speed increasing spindle for an M/C using a traction drive (TD) isdeveloped by the authors. The wedge roller TD, whichgenerates a contact force in proportion to a transmitted torque, is adopted to reduce a heat generation. The performance ofdeveloped spindle is evaluated by comparing that of the spindle using planetary gears. The experiments were carried out usingthe square end mill of 2 mm in dia. and a workpiece of NAK55. The rotary speed of tool is 5000 min–1 and the cutting depth and feed are changed variously. The surface roughness in case of the TD spindle shows 0.1 to 0.23 μmRa better than that of the gear spindle. The temperature rise of TD spindle is larger than that of gear spindle because an oil seal is used to prevent a traction oil leakage.
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  • On–machine Measurement of Diameter and Run–out in Axial Direction for Small Diameter End–mill in High–speed Rotation
    Yuichi Hayashi, Kazuhito Togawa, Kimio Miyazawa, Kazuhisa Yanagi
    Session ID: D17
    Published: March 05, 2006
    Released on J-STAGE: January 31, 2007
    DOIhttps://doi.org/10.11522/pscjspe.2006S.0.259.0
    CONFERENCE PROCEEDINGS FREE ACCESS
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    It is difficult to identify center axis of non–cylindrical cutting tools such as end–mill and drill because of their complicated shape and geometry. As they are attached to machine tool spindle unit with a mechanical chuck, some eccentricity arises in cutting. The rotational eccentricity of cutting tool may affect the machined surface and unfavorable surface texture is generated. It is preferable to keep the eccentricity within an allowable range so that we could achieve high quality cutting. We used a commercially available optical measuring instrument for measuring the diameter and run–out of those non–cylindrical cutting tools. In this report we describes the measuring principle and several application results. Cutter run–out as well as rotational locus in axial direction of end–mill and abnormal vibration of spindle were revealed.
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  • Simulation of Mode I,II Crack Propagation of Silicon Using an Analytical Solution–Controlled MD
    Koichiro Yamada, Kentaro Shibuya, Nobuhiro Takezawa, Toyoshiro Inamura
    Session ID: D19
    Published: March 05, 2006
    Released on J-STAGE: January 31, 2007
    DOIhttps://doi.org/10.11522/pscjspe.2006S.0.261.0
    CONFERENCE PROCEEDINGS FREE ACCESS
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    For investigating the basic mechanism of material processing, it is important to clarify how cracks propagate in a material. In this work, simulations of Mode I, II crack propagation have been carried out for Si using an analytical solution–controlled MD in which MD is controlled by the analytical displacement field around a crack. In the case of Mode I, it has been shown that shear slip lines develop from various parts of the crack surface, thereby creating voids along the slip lines occasionally. Also in the case of Mode II, a network of slip lines develops and in–stantaneous void generations occur in the network. From the two results of these simulations, it has been found that growth of slip lines and instantaneous void generations play a crucial role in fracture of silicon.
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  • Molecular Dynamics Analysis on Impact Phenomenon of High–Temperature and High–Speed Droplet
    Tatsunori Itai, Jun Shimizu, Etsuji Ohmura, Yoshifumi Kobayashi, Shoic ...
    Session ID: D20
    Published: March 05, 2006
    Released on J-STAGE: January 31, 2007
    DOIhttps://doi.org/10.11522/pscjspe.2006S.0.263.0
    CONFERENCE PROCEEDINGS FREE ACCESS
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    In order to clarify the flatting process of the high–temperature, high–speed droplet due to its impact on the substrate in an atomic level, a three–dimensional molecular dynamics simulation was performed. By visualizing the simulation results, the deformation and stress distribution of the substrate were investigated. As a result, it was clarified that the strain energy under the outside edge of the droplet became a little bit remarkable, while that under the center region of the droplet became not so remarkable because of sufficient plastic deformation.
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  • Effect of substrate bias on cutting tool matrial in cBN coating
    Toshio Tokoro, Hiroaki Ohnishi, Masao Noma, keiji Ogawa, Heisaburo Nak ...
    Session ID: D32
    Published: March 05, 2006
    Released on J-STAGE: January 31, 2007
    DOIhttps://doi.org/10.11522/pscjspe.2006S.0.271.0
    CONFERENCE PROCEEDINGS FREE ACCESS
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    This study describes the influence of substrate bias frequency in cBN coating with a magnetically enhanced plasma ion plating (MEP–IP) method on the cutting tool material and middle layers of coated films. It might be shown by SEM observation and element analysis that the tool material and the middle layers of coated films can be damaged in higher 13.56MHz frequency coating. The higher temperature is caused on the tool surface by skin effect. Therefore, we applied lower substrate bias frequency of 100kHz in coating in order to avoid low quality coating. As a result, the higher quality coated films can be obtained. Moreover, the better cutting performance was shown by 100kHz frequency coating.
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  • Influence of soft magnetic material element on the wear mechanism of binder–less cBN tool
    kazuhiro Shintani, yoshiki Takanami, hajime Kawano, akihiko Ikegaya
    Session ID: D33
    Published: March 05, 2006
    Released on J-STAGE: January 31, 2007
    DOIhttps://doi.org/10.11522/pscjspe.2006S.0.273.0
    CONFERENCE PROCEEDINGS FREE ACCESS
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    Soft magnetic material is composite material of plastic series iron system materials and materials, but gives influence to wear rate of a tool when this ingredient ratio is different. In particular the influence becomes big in a high–speed machining condition. In this report, I investigated work piece material and relation of tool wear speed when high speed processed soft magnetic material using a binder–less PcBN tool. As a result it was assumed that it was clear with a plastic component rate in, work piece influencing tool wear mechanism greatly.
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  • Evaluation of Tool that Processes Die Steel of High Hardness
    Masahiko Fukui, Kenji Motohashi, Yasutomo Hiruta
    Session ID: D34
    Published: March 05, 2006
    Released on J-STAGE: January 31, 2007
    DOIhttps://doi.org/10.11522/pscjspe.2006S.0.275.0
    CONFERENCE PROCEEDINGS FREE ACCESS
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  • Low–frequency Vibration Drilling of Titanium Alloy
    Kiyoshi Okamura, Hiroyuki Sasahara, Segawa Toshiaki, Masaomi Tsutsumi
    Session ID: D35
    Published: March 05, 2006
    Released on J-STAGE: January 31, 2007
    DOIhttps://doi.org/10.11522/pscjspe.2006S.0.277.0
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    Dry drilling of composite/metallic stacks for aircraft components is extremely difficult to keep sufficient hole quality and efficiency of drilling process. Problems of the dry drilling of the stacks are chip ejection, chip formation and high temperature especially for titanium alloy. To clear these problems, low–frequency vibration (10–50Hz) drilling is proposed in this study. Controlled vibration was given in drill axis direction. The relationship between vibration conditions, such as vibration amplitude, frequency and drill feed rate, and chip formation and drilling temperature were investigated. As a result, low–frequency vibration drilling can control chip formation to reduce chip jamming and reduce drilling temperature. The temperature at cap burr decreased by 300 degrees or more when low–frequency vibration was applied compared with the conventional drilling.
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