• 제목/요약/키워드: Ruled surface method

검색결과 27건 처리시간 0.024초

3차원 정보가 반영된 브래지어 패턴 설계 -Ruled surface의 활용- (Brassiere Pattern Design Using the 3D Information - Application of Ruled Surface-)

  • 이예진;홍경희
    • 한국의류학회지
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    • 제28권11호
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    • pp.1536-1543
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    • 2004
  • Garment is made by a 2D pattern and should be fitted to a human body which has 3D characteristics. Therefore, to design a pattern more effectively, the use of 3D information of a human body and the investigation of relationship between the 3D garment and 2D pattern are necessary. In this work, ruled surface method was used to reflect the 3D information of a human body for a pattern design. The images of the brassiere line on the woman's dress form were captured by phase-shifting projection moire system and the 3D information on the design line was obtained. 2D patterns on the various parts of the brassiere were developed directly from the 3D data by the ruled surface method. In addition, design line, the area and the amount of dart were quantified. And then we verify the appropriateness of the ruled surface method to the 2D pattern development by measuring the distribution of the space between women's figure and segmented clothing item. It was found that the ruled surface method is useful to transform the 3D design line to the 2D pattern, if we followed the steps suggested in this paper.

Ruled Surface의 곡률이론을 이용한 새로운 로봇궤적제어기법

  • 김재희;김상철;유범상
    • 한국정밀공학회:학술대회논문집
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    • 한국정밀공학회 1997년도 춘계학술대회 논문집
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    • pp.683-691
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    • 1997
  • This paper presents a new robot trajectory generation method based on the curvatre theory of ruled surfacees. robot trajectory is represented as a ruled surface generated by the TCP (Tool center point ) and any one unit vector among the tool frame (usually denoted O, A,N). The curvature theory of ruled surfaces provides the robot control algorithm with the motion property oarameters. The proposed method eliminates the necessity of approximation technic of either joint or cartesian interpolation. This technic may give new methodology of precision robot control. Especially this is very efficient when the robot traces an analytical or form surface if the surface is geometrically modelled.

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5축 NC 기계의 실시간 제어기법 개발을 위한 룰드 서피스 곡률 이론의 적용 연구 (A Study on the Application of the Curvature Theory of Ruled Surfaces for the Development of Five-Axis NC Machine Real-Time Control Algorithm)

  • 김재희;유범상
    • 대한기계학회논문집A
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    • 제24권1호
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    • pp.182-189
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    • 2000
  • This paper presents the real time control method of 5-axis NC machine for high precision and productivity based on the curvature theory, of a ruled surface. The trajectory, of NC machine is described by, way of a ruled surface generated by the points on part surface and tool axis direction vector. The curvature theory, of a ruled surface is then applied to deter-mine the motion parameters of the 5-axis machine for control. The controller computes position, orientation, and differential motion parameters of the tool in each sampling period. The real-time approach produces smoother surfaces and requires substantially less machining time compared to conventional off-line approaches. The propose real-time control method based of the curvature theory of a ruled surface may give new methodology of precision 5-axis machine control.

룰드서피스 듀얼곡률이론을 이용한 로봇경로계획 (A Robot Trajectory Planning based on the Dual Curvature Theory of a Ruled Surface)

  • 박상민;송문상;김재희;유범상
    • 한국정밀공학회:학술대회논문집
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    • 한국정밀공학회 2002년도 추계학술대회 논문집
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    • pp.482-487
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    • 2002
  • This paper presents a robot trajectory generation method based on the dual curvature theory of ruled surfaces. Robot trajectory can be represented as a ruled surface generated by the TCP(Tool Center Point) and my unit vector among the tool frame. Dual curvature theory of ruled surfaces provides the robot control algorithm with the motion property parameters. With the differential properties of the ruled surface, the linear and angular motion properties of the robot end effector can be utilized in the robot trajectory planning.

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Ruled Surface로 형성된 임펠러 블레이드 전용 CAD/CAM 시스템 개발 I (모델링에 관한 연구) (The Development of Exclusive CAD/CAM System for Impeller Blades Formed by Ruled Surface I(A Study on the Modeling))

  • 조현덕;정대일;윤문철;최두선;신보성;이응숙
    • 한국공작기계학회논문집
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    • 제10권6호
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    • pp.71-77
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    • 2001
  • We have developed the exclusive CAD/CAM system for the machining of impeller blades. This study is about the mod-eling method for the effective machining of impeller blades farmed by ruled surface. As the impeller is consisted of boss part and blade part, the boss is modeled by rotational surface of hub curve on z-axis and the blade is described by ruled- surfaces between hub curve and shroud curve. This modeling process can be carried out on the software developed in this study. And, the developed software can describe the impeller as a solid model through interface with Solid-Works soul- ware. The developed software containing the interface method proposed in this study was very effective fur impeller modeling.

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임펠러 5-축 CNC 가공에 관한 연구 (A Study on The 5-Axis CNC Machining of Impeller)

  • 조현덕
    • 한국생산제조학회지
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    • 제6권4호
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    • pp.19-26
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    • 1997
  • The manufacture of an impeller typically requires the 5-axis CNC machining, since the impeller is usually under working conditions such as high speed, high temperature, and high pressure. Thus, this study contributes to development of an exclusive CAM system for effective 5-axis CNC machining of a ruled surface type impeller. In this study, the sampled impeller is made of blades and a body and the blade consists of ruled surfaces between hub curve and shroud curve. In the post processing for 5-axis NC part program, the cutter axis direction vector is the straighten vector on ruled surface. The position of ball center in ball end mill cutter is decided on the interference check between the cutter and body surface of impeller using with the modified z-map method that z-axis is the same of cutter axis direction vector. The exclusive CAM system for an impeller developed in this study was very effective for designs and 50-axis machining of a ruled surface type impeller.

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Ruled Surface로 형성된 임펠러 블레이드 전용 CAD/CAM 시스템 개발 II(5-축 가공에 관한 연구) (The Development of Exclusive CAD/CAM System for Impeller Blades Formed by Ruled Surface II (A Study on the 5-Axis Machining))

  • 조현덕;정대일;윤문철;최두선;신보성;이응숙
    • 한국공작기계학회논문집
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    • 제11권3호
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    • pp.1-8
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    • 2002
  • This study is continuous with the study I (A Study on the Modeling) and the sample impeller of this study is defined by the modeling process of the exclusive CAD/CAM system developed in the study Ⅰ. And, this study describes a method for the 5-axis machining of impeller blades formed by ruled surface. Therefore, the exclusive CAD/CAM system is the software for modeling md machining of impeller blades. By using the machining method suggested in this study, we could manufacture impeller blades on 5-axis CNC machining center and the machined impeller was very agreeable to the designed impeller. Thus, theories proposed in this study can be very useful for the 5-axis machining of impeller blades.

5축 Machining Center를 이용한 임펠러 가공을 위한 공구경로 생성에 관한 연구 (A Study on Tool Path Generation for Machining Impellers with 5-Axis Machining Center)

  • 장동규;조환영;이희관;공영식;양균의
    • 한국정밀공학회지
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    • 제21권3호
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    • pp.83-90
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    • 2004
  • This paper proposes a tool path generation method for machining impellers with 5-axis machining center. The shape of impeller is complex, being composed of pressure surface, suction surface and leading edge, and so on. The compound surface which is made of ruled surface such as pressure surface and suction surface and leading edge such as fillet surface, makes the tool path generation much complicated. To achieve efficient roughing, cutting area is divided into two region and then tool radius of maximum size that do not cause tool intereference is selected for shortening machining time. In finishing, accuracy is improved using side cutting for blade surface and point milling for leading edge.

공구 이동 궤적면과 Z-direction 벡터의 교차점 계산 (Finding an Intersection Point between Cutter Swept Surface with a Z-Direction Vector)

  • 박배용;안정호
    • 대한기계학회:학술대회논문집
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    • 대한기계학회 2001년도 춘계학술대회논문집C
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    • pp.235-239
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    • 2001
  • Finding intersection point between a surface and a line is one of major problem in CAD/CAM. The intersection point could be found in an exact form or with numerical method. In this paper, the exact solution of the intersection point between a ruled surface which is generated by the movement of an endmill and the z-direction vector is presented. The cutter swept surface which is a ruled surface and the Z-direction vector are represented with parametric equations. With the nature of parametric equations, the geometric properties at the intersection point are easily acquired.

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Ruled Surface로 형성된 임펠러 블레이드의 5-축 가공에 관한 연구 (A Study on the 5-Axis Machining of Impeller Blades with Ruled Surfaces)

  • 정대일;조현덕;윤문철;최두선;신보성;이응숙
    • 한국공작기계학회:학술대회논문집
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    • 한국공작기계학회 2000년도 추계학술대회논문집 - 한국공작기계학회
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    • pp.175-180
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    • 2000
  • This paper describes the method and the process for impeller machining on 5-axis CNC machining center. Also, The CAD/CAM software for the impeller post processing is developed. The software can be interfaced with Solid-works software for confirmation of the impeller shapes. In this study, blades on impeller is described from Ruled-surfaces between two Ferguson curves. In this study, using 5-axis NC part program obtained from the developed software, a sample impeller was machined on 5-axis CNC machining center. The machined impeller was very agreeable to the designed impeller. Thus, theories proposed in this study can be very useful for the 5-axis machining of impeller blades with Ruled-surfaces.

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