著者

乾 正知 崔 原己

出版者

公益社団法人 精密工学会

雑誌

精密工学会誌 (ISSN:09120289)

巻号頁・発行日

vol.68, no.10, pp.1316-1320, 2002-10-05 (Released:2009-12-04)

参考文献数

8

被引用文献数

1

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Molds and dies are usually fabricated using 3-axis NC milling machines with a spherical cutter. In order to avoid gouging problems in the milling process, a tool reference surface representing the offset shape of the designed surface is computed prior to the cutter path generation. Inverse offset method is used in practice which approximates the tool reference surface as a set of dense points. These points are usually derived as an elevation map of uniform grid points on the xy-plane, therefore distance between the points on the near vertical surface often becomes larger than the acceptable value. Such grid based computation causes stair-case errors on the wall shape, which also deteriorate the surface quality. In this paper, the authors propose an improvement of the inverse offset method. Our method computes the points on the tool reference surface by using additional two grids on the yz-plane and zx-plane. Different from the conventional method, proposed method can control the distance between the points on the tool reference surface being smaller than a certain constant value. Most part of the computation in our method can be accelerated by using the hardware power of the polygon rendering LSI, which is already equipped in most PCs. An experimental program is implemented and some computations of the tool reference surfaces are demonstrated.

著者

大場 光太郎 邱 暁明 上島 泰

出版者

公益社団法人 精密工学会

雑誌

精密工学会誌 (ISSN:09120289)

巻号頁・発行日

vol.81, no.1, pp.1-4, 2015-01-05 (Released:2015-01-05)

被引用文献数

1 1

著者

櫻井 光広 小林 伸明 北 武司 鈴木 亮一 北村 泰紀

出版者

公益社団法人 精密工学会

雑誌

精密工学会誌 (ISSN:09120289)

巻号頁・発行日

vol.66, no.8, pp.1200-1205, 2000-08-05 (Released:2009-04-10)

参考文献数

11

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A controller based on inverse system has no countermeasure against modeling error of a control object. On the other hand, one of limiting properties of the linear optimal control by letting a weighting matrix of cost functional tends to infinity has disturbance decoupling property. In this paper, a trajectory tracking control method is proposed by combining an approach based on inverse system with limiting properties of the linear optimal control. The proposed method is applied to trajectory tracking control of two links robot manipulator. Comparative numerical simulations and experiments confirm effectiveness on trajectory tracking control.

著者

大藤 正

出版者

公益社団法人 精密工学会

雑誌

精密工学会誌 (ISSN:09120289)

巻号頁・発行日

vol.75, no.11, pp.1289-1292, 2009-11-05 (Released:2011-02-07)

参考文献数

3

著者

樋口 静一 斎藤 武男 斎藤 義夫 花岡 忠昭

出版者

公益社団法人精密工学会

雑誌

精密工学会誌 (ISSN:09120289)

巻号頁・発行日

vol.59, no.8, pp.1281-1287, 1993

被引用文献数

1 1

---

The slack-of-belt grinding method is used in the finishing process of high-grade furnishings and parts used for special functions. However, the abrasive belt flexibility causes difficulty in recognizing its characteristics and in automating this finishing process. In this study, for automation of the slack-of-belt type grinding process using fuzzy theory, fundamental research was carried out. A fuzzy rule was derived by investigating the characteristics of the slack-ofbelt and by arranging the experimental results. This control system keeps the amount of stock removal at the required values. This system infers the necessary grinding time from the abrasive belt conditions by employing the fuzzy rule. The belt conditions are judged from the tangential grinding force which is detected when the workpiece is pressed against the abrasive belt. As a result of the experiments, it was found that there was a great possibility of applying the fuzzy theory to the automation of the grinding process using an abrasive belt.

著者

増井 慶次郎 ローズ キャサリン 水原 清司 石井 浩介

出版者

公益社団法人精密工学会

雑誌

精密工学会誌 (ISSN:09120289)

巻号頁・発行日

vol.66, no.4, pp.567-571, 2000-04-05

被引用文献数

10 5 3

---

This paper surveys end-of-life strategies currently used in the electronics and appliances industries and identifies product characteristics that guide designers to specify appropriate strategies. The survey indicates that important characteristics are wear-out life, design cycle, technology cycle, functional complexity, number of materials, and number of parts. Two key characteristics, wear-out life and technology cycle, serve as factors to categorize products' appropriate life-cycle scenarios. The categorization leads to a methodology that guides product designers to seek environmentally friendly designs, and to identify opportunities for developing new recycling technologies. Further, an application of quality function deployment (QFD) as a design support tool for helping design engineers early in the product design based on appropriate life-cycle strategies is proposed.

著者

田中 秀幸

出版者

公益社団法人 精密工学会

雑誌

精密工学会誌 (ISSN:09120289)

巻号頁・発行日

vol.74, no.4, pp.350-353, 2008-04-05 (Released:2010-08-15)

参考文献数

4

著者

藤井 健次

出版者

公益社団法人 精密工学会

雑誌

精密工学会誌 (ISSN:09120289)

巻号頁・発行日

vol.74, no.2, pp.145-149, 2008-02-05 (Released:2010-07-21)

参考文献数

8

---

This paper introduces an analytical method to calculate the stiffness of crossed roller bearings. Load distribution analysis of rollers considering combined radial, axial and moment load makes it possible to apply to three dimensional elastic deformation problems. From equilibrium conditions on forces and Hertz contact theory, relational equations are derived. Solving these non-linear equations numerically with Newton-Raphson method, load distribution and inner ring displacement with fixed outer ring are obtained. Also experiment has been conducted to estimate a discrepancy between the analytical and experimental results. Experimental displacement of inner ring is confirmed to be almost coincident with theoretical one under radial load but smaller than theoretical one by about 20% in the case of axial and moment load. On the other hand the difference between the theoretical and experimental stiffness at higher load is found to be almost the same.

著者

田平 博嗣

出版者

公益社団法人 精密工学会

雑誌

精密工学会誌 (ISSN:09120289)

巻号頁・発行日

vol.74, no.2, pp.121-124, 2008-02-05 (Released:2010-07-21)

参考文献数

3

著者

山田 貴博

出版者

公益社団法人 精密工学会

雑誌

精密工学会誌 (ISSN:09120289)

巻号頁・発行日

vol.77, no.9, pp.840-843, 2011-09-05 (Released:2012-03-05)

参考文献数

3

著者

新野 俊樹

出版者

公益社団法人 精密工学会

雑誌

精密工学会誌 (ISSN:09120289)

巻号頁・発行日

vol.76, no.12, pp.1340-1344, 2010-12-05 (Released:2011-06-05)

参考文献数

8

被引用文献数

6

著者

廣瀬 智博 上 芳啓 清水 龍人 薮谷 誠 森本 喜隆

出版者

公益社団法人 精密工学会

雑誌

精密工学会誌 (ISSN:09120289)

巻号頁・発行日

vol.80, no.10, pp.944-949, 2014-10-05 (Released:2014-10-05)

参考文献数

20

被引用文献数

2 4

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The machining of lens array mold for optics is attracting attention for fabricating camera lens modules. The profiles of axisymmetric aspheric lenses ranging from 1 to 5 mm in diameter are regularly arranged on lens array molds, allowing multiple optical lenses to be molded simultaneously. An ultra-precision machine tool for machining the lens array mold that has high-speed motion and high-accuracy positioning is needed. To solve this problem, we developed an ultra-precision 5-axis machine tool. In this paper, this machine tool was evaluated by high speed machining of the lens array mold. A surface roughness of within 2 nm and a form accuracy of within 0.1μm have been achieved using the shaper machining. The performance of the machine tool and the evaluation results for the machined mold are reported herein.

出版者

公益社団法人 精密工学会

雑誌

精密工学会誌 (ISSN:09120289)

巻号頁・発行日

vol.77, no.6, pp.622-622, 2011-06-05 (Released:2011-12-05)

著者

花井 嶺郎 土屋 総二郎 日比 均 中斎 龍美 寺田 宏幸

出版者

公益社団法人精密工学会

雑誌

精密工学会誌 (ISSN:09120289)

巻号頁・発行日

vol.65, no.8, pp.1085-1091, 1999-08-05

被引用文献数

5 3

著者

高橋 智一 菊池 智史 鈴木 昌人 青柳 誠司

出版者

公益社団法人 精密工学会

雑誌

精密工学会誌 (ISSN:09120289)

巻号頁・発行日

vol.79, no.10, pp.970-971, 2013

被引用文献数

4

著者

小藪 国夫 渡辺 純二

出版者

公益社団法人精密工学会

雑誌

精密工学会誌 (ISSN:09120289)

巻号頁・発行日

vol.55, no.12, pp.2241-2246, 1989-12-05

被引用文献数

4 2

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Nd : YAGレーザとKOH液を用いたLAEによるセラミックスの微細形状加工技術としての実用化促進をねらい, LAEの特徴を発揮した三つの微細形状加工の形態について検討し, 次の結果からLAEが実用レベルに達したことを確認した.<BR>(1) 高品質の形状で寸法30×90×1000μmの微小片持ちはりを打抜き加工で形成した.<BR>(2) 異種材料を積層した基板に, 各層ごとの打抜きを行うことにより, 立体微細形状を形成した.<BR>(3) マスクを用いた微細形状加工では, 加工条件と転写パタン寸法との関係を明らかにし, 多数の微細パタンを能率良く形成した.

著者

勝又 大介 大野 学

出版者

公益社団法人 精密工学会

雑誌

精密工学会誌 (ISSN:09120289)

巻号頁・発行日

vol.79, no.9, pp.873-878, 2013

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This paper describes development of an in-pipe mobile robot driven by pneumatic pressures. Town gas is supplied to houses through polyethylene pipes laid under the road. It are necessary to inspect these pipes regularly caused by the gas leak owing to earth load and oscillation for driving cars on the road. The robot is fabricated on the model of a green caterpillar for the purpose of inspecting these pipes. The caterpillar moves forward on leaf by waving motion of somites and clinging to a leaf for using abdominal legs and anal prolegs. The robot is structured by three somites and four suction brakes. This somite which structured by four pneumatic bellows actuators plays the role of the caterpillar's somite, and suction brake plays the role of the abdminal prolegs and anal prolegs. We confirmed that the robot's moving speed is 9.2 mm/s at acrylic pipe more 110 mm in inner diameter, and maximum traction force is 28.4 N. The robot having traction force 28.4 N can move mathematically in a horizontal pipe which has two elbows and 30 m length. In addition, mechanism of traction force is clarified by using the dynamic model of the robot.

著者

寺田 英嗣 牧野 洋 今瀬 憲司

出版者

公益社団法人 精密工学会

雑誌

精密工学会誌 (ISSN:09120289)

巻号頁・発行日

vol.54, no.11, pp.2101-2106, 1988-11-05 (Released:2009-10-08)

参考文献数

3

被引用文献数

1 12

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A newly developed Cycloid Ball Reducer is introduced and analyzed. The fundamental element of the reducer consists of three components ; two surface-grooved discs and a train of balls. One of the discs has an epicycloidal-wave groove on one side of its surface, while the other disc has a hypocycloidal-wave groove. The two grooves face each other, and between them balls are arranged in a uniform angular pitch. The balls transmit torque between the two discs. A proper amount of thrust force is applied axially to eliminate backlash. This Cycloid Ball Reducer is suitable for application to servo mechanisms and robots. It is compact and easy to build in a unit, and has a large torque capacity. In this report, the principle of the reducer is analyzed using polar complex vectors. It is proved that the reducer has linear characteristics in principle. The reduction ratio can be chosen a wide range.

出版者

公益社団法人 精密工学会

雑誌

精密工学会誌 (ISSN:09120289)

巻号頁・発行日

vol.77, no.9, pp.844-845, 2011-09-05 (Released:2012-03-05)

著者

広瀬 茂男

出版者

公益社団法人 精密工学会

雑誌

精密工学会誌 (ISSN:09120289)

巻号頁・発行日

vol.60, no.7, pp.914-919, 1994-07-05 (Released:2009-06-30)

参考文献数

13