精密工学会誌
Online ISSN : 1882-675X
Print ISSN : 0912-0289
ISSN-L : 0912-0289
53 巻 , 10 号
選択された号の論文の26件中1~26を表示しています
  • 安永 暢男, 宮崎 俊行, 三宅 正二郎
    1987 年 53 巻 10 号 p. 1503-1506
    発行日: 1987年
    公開日: 2009/06/30
    ジャーナル フリー
  • 広瀬 洋一
    1987 年 53 巻 10 号 p. 1507-1510
    発行日: 1987年
    公開日: 2010/02/16
    ジャーナル フリー
    メタンやアルコール等の炭素源と水素を用いた熱フィラメントCVD法でダイヤモンド薄膜を合成できることをX線回折,ラマン分光によって確認した.本方法はフィラメントと基板からなる簡単でしかも安価な装置である.ダイヤモンドの成長速度も10μm/hと速く,合成の圧力範囲が広く,特に常圧(760 Torr)で合成できることは,操作も容易になり工業化に有望であると思われる.
    一方,フィラメントの寿命,ダイヤモンド薄膜の大面積化,反応プロセスの低温化などが今後の課題である.ダイヤモンドは新素材として今後とも注目を集めていくであろう.
  • 佐藤 洋一郎
    1987 年 53 巻 10 号 p. 1511-1514
    発行日: 1987年
    公開日: 2009/06/30
    ジャーナル フリー
  • 犬塚 直夫, 澤邊 厚仁
    1987 年 53 巻 10 号 p. 1515-1518
    発行日: 1987年
    公開日: 2009/06/30
    ジャーナル フリー
  • 広地 久美子, 北畠 真
    1987 年 53 巻 10 号 p. 1519-1522
    発行日: 1987年
    公開日: 2009/06/30
    ジャーナル フリー
  • 難波 義捷
    1987 年 53 巻 10 号 p. 1523-1526
    発行日: 1987年
    公開日: 2009/06/30
    ジャーナル フリー
  • 石黒 孝, 斎藤 秀俊, 一ノ瀬 幸雄
    1987 年 53 巻 10 号 p. 1527-1531
    発行日: 1987年
    公開日: 2009/06/30
    ジャーナル フリー
  • 峰田 進栄, 安永 暢男
    1987 年 53 巻 10 号 p. 1532-1535
    発行日: 1987年
    公開日: 2009/06/30
    ジャーナル フリー
    CO2レーザを用いたレーザPVD法の特徴を紹介し,またNイオン同時照射により,化学量論比に近いcBN膜の作成が可能であることを示した.膜質および基材との密着性の向上を図り,コーティング工具として実用可能なcBN膜を作成することが当面の課題といえる.
  • 稲川 幸之助, 渡辺 一弘, 斉藤 一也, 湯池 祥之, 伊藤 昭夫
    1987 年 53 巻 10 号 p. 1536-1539
    発行日: 1987年
    公開日: 2009/06/30
    ジャーナル フリー
  • 佐藤 守
    1987 年 53 巻 10 号 p. 1540-1543
    発行日: 1987年
    公開日: 2009/06/30
    ジャーナル フリー
  • 坂村 健
    1987 年 53 巻 10 号 p. 1546-1549
    発行日: 1987年
    公開日: 2009/06/30
    ジャーナル フリー
  • 青木 晴善, 小川 恵一
    1987 年 53 巻 10 号 p. 1550-1554
    発行日: 1987年
    公開日: 2009/06/30
    ジャーナル フリー
  • 小林 明発
    1987 年 53 巻 10 号 p. 1555-1561
    発行日: 1987年
    公開日: 2009/06/30
    ジャーナル フリー
    フライス切削のうち,もっとも複雑な切削を営むエンドミルの溝削りの切削特性を解明するため,まず基礎的な段階として1枚刃の直刃エンドミルにより底刃の影響をなくした二次元的な溝削り実験を行い,1切削サイクル中の切削抵抗変化および被削面粗さを精確に測定した.その結果,エンドミルの溝削りに関し以下の切削特性が明らかとなった.
    (1)上向き切削と下向き切削の転換点は,刃先の回転方向と工作物の送り方向の関係からは刃先回転角90°であるが,テーブル送り方向分力私は刃先回転角120°程度で作用方向が転換することから,下向き切削領域初期の刃先回転角90°から120°程度までは過渡的上向き切削領域とみなしうる.
    (2)1切削サイクル中の主分力と背分力の関係から,エンドミルの溝削りにおいては切削初期と切削終了時にRubbing領域が存在するが,切削初期のRubbing領域ではBurnish効果を生ずるが,切削終了時のRubbing領域ではBurnish効果を生じない.
    (3)1切削サイクル中の被削面粗さは,切削サイクル中の切削力の作用状態,すなわち切削初期のBurnish領域,上向き切削領域,過渡的上向き切削領域,下向き切削領域に対応して4段階に変化する.
  • 萩生田 善明, 刈込 勝比古, 中川 威雄
    1987 年 53 巻 10 号 p. 1562-1568
    発行日: 1987年
    公開日: 2009/06/30
    ジャーナル フリー
    A diamond grinding stone bonded by sintered cast iron powder as the matrix has been developed. This stone was applied to lapping, superfinishing, honing and grinding, and showed a highly improved grinding ability especially for hard and brittle work materials. This paper describes the manufacturing process of the stone and some results of the experiments concerning the stone materials. Diamond abrasives are mixed with cast iron powder and carbonyl iron powder which is added in order to get strong abrasive retention. This mixture is compacted into a grinding stone by press forming or roll forming process and then sintered 1 140°C for 30 minutes in an ammonia cracking gas atmosphere. As the result, the diamond particles are distributed uniformly and bonded firmly in the cast iron matrix which consists of pearlite, ferrite and flake graphite, so that the grinding property of the stone is improved and the dressing becomes relatively easier. The effects of the size and the content of the abrasive and the amount of the carbonyl iron powder are discussed from the mechanical properties of the grinding stone estimated by radial crushing strength test and bending test. It has been found that the residual quantity of the diamond at the sintered temperature is about 84 wt%.
  • 中島 利勝, 宇野 義幸, 橘 達人
    1987 年 53 巻 10 号 p. 1569-1575
    発行日: 1987年
    公開日: 2009/06/30
    ジャーナル フリー
    Crush dressing process and grinding performance of crush-dressed wheel are experimentally investigated, analyzing dressing force, grinding force, wheel wear, surface roughness and so on. SEM observations of cutting edges and measurements of characteristic values to quantify the condition of cutting edges on the wheel surface are performed. Main results obtained in this paper are as follows : (1) There exists three distinct states in crush dressing process ; transient state, steady state and crush-out state. (2) The higher the number of revolution of grinding wheel in crush-out dressing is, the larger grinding force and the less surface roughness and wheel wear rate become. (3) Higher infeed rate of crush roll results in sharper cutting edges and less cutting edge density, which leads to lower grinding force, larger surface roughness and higher wheel wear rate. (4) Softer wheel grade leads to lower grinding force and larger surface roughness. (5) Sharper cutting edges with lower cutting edge density are generated as compared with those in rotary dressing and conventional dressing.
  • 竹内 芳美, 坂本 正史, 浅尾 晃通, 中村 平
    1987 年 53 巻 10 号 p. 1576-1581
    発行日: 1987年
    公開日: 2009/06/30
    ジャーナル フリー
    The study deals with the development of a tool position control device by means of a piezo-electric actuator and the compensation method of machining errors in turning. The tool position control device is mounted at the tool post of an NC lathe linked to a personal computer for DNC. The voltage control of the piezo-electric actuator by the personal computer makes it possible to slightly move the tool position in the depth of cut. The movement of tool on the basis of the machining errors leads to the improvement of machining accuracy. From experimental results concerning to cylindrical workpieces, it is found that the device has the potential of improving the machining accuracy.
  • 北嶋 弘一, 田中 行雄, 中村 順, 有本 浩
    1987 年 53 巻 10 号 p. 1582-1588
    発行日: 1987年
    公開日: 2009/06/30
    ジャーナル フリー
    This study aims at a theoretical and experimental investigation on the improvement of dynamic rigidity of the complex tool shank by combining high-damping alloy with high-stiff material such as sintered carbide. There are various kinds of high-damping alloy, and SILENTALLOY of ferromagnetic kind is used in this case. The main conclusions obtained are as follows. (1) The damping characteristics in complex tool shank of sandwich construction depends on the outside materials. (2) The complex tool shank has the highest dynamic rigidity when it is constructed with SILENTALLOY on the inside and sintered carbide on the outside and its cutting stability against chatter vibration increases considerably.
  • 白樫 高洋, 井原 透, 金沢 憲一, 臼井 英治
    1987 年 53 巻 10 号 p. 1589-1595
    発行日: 1987年
    公開日: 2009/06/30
    ジャーナル フリー
    Using the specially designed impact testing machine, the fracture characteristics of carbide material P 20 and its deterioration process by impact repetition are examined quantitatively under various temperature less than 800°C and under various impact duration. The main results obtained are as follows: (1) The fracture stress decreases with temperature increase, however the features of fracture are seen as a brittle one even at 800°C. (2) Both temperature and heating duration have no effect on the deterioration process by impact. The rate of deterioration depends on the impact stress and the number of impact but on the temperature. (3) Many small cracks or voids with random size and directions around WC particles in a sintered carbide are generated by both the cyclic uniaxial compressive and tensile impact, thus the isotropical deterioration may be expected in a carbide material. (4) The hypothesis for evaluation of the deterioration process by multiaxial stressing at any temperature less than 800°C is proposed.
  • 升田 雅博, 鳥居 正司, 中嶋 博樹
    1987 年 53 巻 10 号 p. 1596-1601
    発行日: 1987年
    公開日: 2009/06/30
    ジャーナル フリー
    It is well known that the tool life in machining nickel-based alloys depends mostly on the gloove wear of the cutting tool. In this paper, the influence of cutting force distributions along a side cutting edge on boundary failure in cutting Nimonic 80 A is examined and is compared with these of stainless steel (SUS 304) and carbon steel (S 45 C). To measure cutting force distributions the tool dynamometer, which has two cutting edges and can measure separately the cutting forces on these is used. Cutting forces on the boundary regions of a side cutting edge are considerably large in cutting materials that the boundary failure arises. These results are discussed by observing the surface hardness and the cutting bur. Further, this paper presents some methods on decreasing the gloove wear. The improvement of the rake face on boundary regions and the use of tool materials with high toughness are able to increase a tool life.
  • 田中 健一, 小池 昌義, 鴨下 隆志, 松田 次郎, 矢野 宏
    1987 年 53 巻 10 号 p. 1602-1608
    発行日: 1987年
    公開日: 2009/06/30
    ジャーナル フリー
    This paper presents an application of new statistical parameter optimization method to designing plastic injection molding process. Optimum condition is derived by combining highest level of SN ratio of each parameter. The SN ratio represents the variance of products and the process control ability in trial production on many parameter's conditions layouted orthogonal array. This optimization is carried out on two characteristics of products. Selection method of control parameters is discussed to reduce process fluctuation still remained after the parameter optimization. The effect of optimization and the possibility of control by the method are confirmed experimentally. The results show improvement in the process variance of more than 5 dB and possibility of both two-characteristics optimization and control.
  • 岩田 一明, 杉村 延広, 荒井 栄司, 乙井 克也
    1987 年 53 巻 10 号 p. 1609-1615
    発行日: 1987年
    公開日: 2009/06/30
    ジャーナル フリー
    Recently, particular emphasis has been given to development of product model aimed at realizing integrated CAD/CAM systems for machine products. The product model is required to include both the geometric information and the technological information such as accuracy data, surface roughness data and material data. This paper deals with a description method for accuracy of part in product modeling. The contents of information about the accuracy of part are investigated referring to the JIS dealing with "tolerances of form and position" and "system for limits and fits". Seven items are extracted through the investigation, which are needed to represent the accuracy data. A data structure is proposed to describe these items and to connect the accuracy data with the geometric information of part. Systematic procedures are developed to verify the consistency among the accuracy data, and to modify and expand the tolerance zones when a set of accuracy data given to the part are concatenated. It is shown, through case studies, that the description method and the procedures proposed here are effective for the product modeling in CAD/CAM.
  • 宮地 隆太郎, 須田 稔, 原田 正躬
    1987 年 53 巻 10 号 p. 1616-1621
    発行日: 1987年
    公開日: 2009/06/30
    ジャーナル フリー
    Recently, gas bearings have been used in high technology industry. But, conventional bearings have obliged mean clearance to be as wide as 20-30 μm by the use of inherently compensated restrictors. In this paper, an externally pressurized gas journal bearing is made as an experiment, and load capacity, stiffness and gas flow rate are measured. The test bearing is 30 mm in length, 30 mm in diameter, 3 mm in pocket diameter and 0.05, 0.1 and 0.2 mm in orifice diameter respectively. Following conclusions are obtained. (1) By the use of pocketed orifice restrictors, the stiffness is the highest at 7-13 μm in mean radial clearance without generating pneumatic hammer instability. (2) As the bearing can be operated with a narrow clearance, gas flow rate is about 4 L/min with 0.1 mm in orifice diameter and 10 μm in radial clearance at supply pressure of 0.6 MPa.
  • 山藤 和男, 馮 青
    1987 年 53 巻 10 号 p. 1622-1625
    発行日: 1987年
    公開日: 2009/06/30
    ジャーナル フリー
    This paper describes the design and simulation of the postural control system of a twin cycle which has twin wheels on a driving axis and a controlling arm suspended from the upper structure. The three-degree-of-freedom twin cycle is modeled as a wheel and an inverted pendulum with a controlling arm pivoted at its upper end. The controlling arm rotates to give a pendulum restoring moment. A nonlinear feedback control system for the model has been designed using a unique model matching method with which time varying feedback coefficients are computed for each sampling time by coinciding the poles of the characteristic equation of the model with those of a given stable system. Simulation of the control systems has been carried out on a personal computer. The inverted pendulum system can be stabilized quickly against given initial disturbances.
  • 金沢 憲一, 河野 彰夫, 佐田 登志夫, 田代 良雄
    1987 年 53 巻 10 号 p. 1626-1631
    発行日: 1987年
    公開日: 2009/06/30
    ジャーナル フリー
    A new type of ultra-micro hardness tester has been developed in order to obtain precise indentation hardness of thin films and brittle materials. A differential coil with an accuracy of 0.01 μm is used in measurement of indentation depth instead of width. Electromagnetic force generated by applying an electric current to force coil is utilized for loading to a specimen, and so indentation hardness at a load of 9.8 × 10-5 N {10 mgf} can be obtained. Indentation test is automatically performed according to the program in microcomputer, and increasing load and indentation depth can be instantly recorded during the test. Use of microcomputer enables value of load and loading speed to be set over a wide range. A new method of finding out the surface of specimen is devised and experimentally confirmed. The indentation test in a few materials shows that the displacement of the indenter during loading is divided into the elastic and plastic ones with a high accuracy.
  • 西田 知照, 小林 洋一, 塚本 尚久, 滝 晨彦
    1987 年 53 巻 10 号 p. 1632-1638
    発行日: 1987年
    公開日: 2009/06/30
    ジャーナル フリー
    When the values of coordinates and gradients at some points on a work tooth profile are given, the hob tooth profile can be calculated analytically. In this report, the tooth profile of hobs with rake angle and relief angle is calculated. Transmission of rake angle error and setting error of hobs to a work is analyzed. When the allowable value of a work tooth profile error is given, the allowable value of rake angle error and setting error of hobs can be decided by this method.
  • 森山 茂夫, 内田 史彦, 瀬谷 英一
    1987 年 53 巻 10 号 p. 1639-1645
    発行日: 1987年
    公開日: 2009/06/30
    ジャーナル フリー
    This paper presents a novel reflection coefficient correction technique for an optical fiber displacement sensor. The new technique uses conventional fiber prove, however, displacement signal and reflection coefficient signal are simultaneously detected with it, where illumination fiber functions for both irradiating a target plane and detecting reflection light from the target. An experimental setup consists of commercially available fiber prove and a laser diode was bulit, and it was found that measuring error was less than 0.05 μm even in case of target reflection coefficient changing from 40% to 95%. In this paper, measuring principle and design method for the optical system are described, also, some experimental results are discussed.
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