• 제목/요약/키워드: kerf

검색결과 72건 처리시간 0.02초

6축 CNC 파이프 코스터 전용 CAM 프로그램 구현 (Implementation of CAM Program for 6-Axis CNC Pipe Coaster)

  • 노태정;이욱진
    • 한국산학기술학회논문지
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    • 제10권9호
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    • pp.2202-2209
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    • 2009
  • 모관과 지관의 다양한 접합형상에 대하여 접합궤적을 수학적으로 유도하였다. 이 접합궤적에 용접부의 루트갭 및 절단폭 등을 보정하여 실제적으로 절단궤적을 결정하여 NC 코드를 생성하고 그 경로를 확인하기 위하여 ghost 기능을 구현하였다. 척회전인 C축의 8개 구간별로 A, B축의 Tilting을 사용하여 개선 기능을 구현하였으며, 이는 절단궤적을 따라서 절단하면서 동시에 개선이 가능하도록 6축 CNC 파이프 코스터 전용 CAM 프로그램을 개발하였다.

CNC 절단기를 이용한 강판의 절단특성에 관한 연구(1) (A Study on the Cutting Characteristics of Plate Steel using CNC Cutting Machine)

  • 김성일;이중희;김태영
    • 한국공작기계학회:학술대회논문집
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    • 한국공작기계학회 2002년도 춘계학술대회 논문집
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    • pp.643-648
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    • 2002
  • In the cutting of plate steel, the quality of the cut surfaces is strongly dependent on the cutting conditions such as cutting speed, kerf width, plate thickness, length of tip-specimen and oxygen pressure etc. the cutting tests of plate steel were carried out using CNC gas cutting machine. this paper deals with cutting characteristics of plate steel using CNC cutting machine. the width of cutting entrance and exit, the surface roughness of cutting surfaces and the cutting surface are examined at various cutting conditions.

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레이저 용융 절단 해석 프로그램 개발 (Development of a Quality Analysis Program for Laser Fusion Cutting)

  • 이성환;민헌식
    • 한국공작기계학회논문집
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    • 제11권3호
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    • pp.72-79
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    • 2002
  • Though the laser cutting process is increasingly used in industry, a process automation and systematic database is still yet to be developed. In this study, as the fundamental step toward the construction of a reliable process expert system, a laser cutting quality monitoring/analysis system is developed based on simulations and experimental results. The relations between laser process parameters and laser cutting surface quality parameters such as kerf geometry, striation, surface roughness and dross formation are characterized and analyzed. A graphical user interface is used to visualize the results.

강판의 절단조건 변화에 따른 절단특성에 관한 연구 (A Study on the Cutting Characteristics of Plate Steel Under Various Cutting Conditions.)

  • 김인철;김성일;고흥;김승기
    • 대한용접접합학회:학술대회논문집
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    • 대한용접접합학회 2002년도 춘계학술발표대회 개요집
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    • pp.36-38
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    • 2002
  • This paper is a study on the effect of the cutting speed, length of tip-specimen and cutting thickness in CNC gas cutting of the high-tensile steel plate(AH36). Experiments were performed to investigate the variations of cutting surface, surface roughness and kerf width under various cutting conditions.

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고장력 강판의 CNC 가스 절단시 절단조건 변화에 따른 절단현상에 관한 연구 (A Study on the Cutting Phenomena in CNC Gas Cutting Under Various Cutting Conditions)

  • 김성일
    • 한국공작기계학회:학술대회논문집
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    • 한국공작기계학회 2002년도 추계학술대회 논문집
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    • pp.186-191
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    • 2002
  • In the CNC gas cutting of steel plate, the cutting quality are strongly dependent on the various cutting conditions. The cutting tests of high tensile steel plate(AH36) were carried out using CNC gas cutting machine at various cutting conditions such as cutting speed, steel plate thickness, distance between tip and specimen etc. The kerf width and the surface roughness of cutting surfaces are examined. The photographs of cutting surface and cutting section are also analyzed.

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Characteristics of the Radio-Frequency/Vacuum Drying of Heavy Timbers for Post and Beam of Korean Style Housings Part II : For Korean red pine heavy timbers with 250 × 250 mm, 300 × 300 mm in cross section and 300 mm in diameter, and 3,600 mm in length

  • Lee, Nam-Ho;Zhao, Xue-Feng;Shin, Ik-Hyun;Park, Moon-Jae;Park, Jung-Hwan;Park, Joo-Saeng
    • Journal of the Korean Wood Science and Technology
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    • 제39권2호
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    • pp.132-139
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    • 2011
  • This study examined the characteristics of radio-frequency/vacuum dried Korean red pine ($Pinus$ $densoflora$) heavy timbers with 250 ${\times}$ 250 mm (S), 300 ${\times}$ 300 mm (L) in cross section and 300 mm in diameter, and 3,600 mm in length, which were subjected to compressive loading after a kerf pretreatment. The following results were obtained : The drying time was short and the drying rate was high in spite of the large cross section of specimens. The moisture gradient inall specimens was gentle in both longitudinal and transverse directions owing to dielectric heating. The shrinkage of the width in the direction perpendicular to was 21 percent ~ 76 percent of that of the thickness of square timbers in the direction parallel to the mechanical pressure. The casehardening for all specimens was very slight because of significantly reduced ratio of the tangential to radial shrinkage of specimens and kerfing. The surface checks somewhat severely occurred although the occurrence extent of the surface checks on the kerfed specimens was slight compared withthat on the control specimen.

티타늄 합금의 연마제 워터 제트 절단에 의한 절단표면 특성 (Characteristics of Cut Surface by Abrasive Waterjet Cutting of Titanium Alloy)

  • 정남용;진윤호
    • Journal of Welding and Joining
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    • 제23권1호
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    • pp.86-93
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    • 2005
  • Abrasive waterjet (AWJ) can provide a more effective means for precision of difficult -to-machining materials such as ceramics and titanium alloys. The present study is focused on the surface roughness of abrasive waterjet cut surfaces. This paper investigated theoretical and experimental surface characteristics associated with abrasive waterjet cutting of titanium alloy Gr2. It is shown that the proper variations of several cutting parameters such as waterjet cutting pressure, cutting speed and cutting depth improve the roughness and characteristics on specimen surfaces produced by AWJ cutting. From the experimental results by AWJ cutting of titanium alloy Gr2, the optimal cutting conditions to improve the surface roughness and precision were proposed and discussed.

Water jet 절단에서의 연마재 종류별 성능 비교 시험 (Comparison of cutting performance of an AWJ with several types of abrasives)

  • ;최병희
    • 터널과지하공간
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    • 제6권2호
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    • pp.175-183
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    • 1996
  • Linear cutting tests on granite were conducted to evaluated the cutting performance of abrasive water jet(AWJ) using several types of abrasives. The abrasives used in the tests were grarnet, alumimum oxide, and silicon carbide. And one type of granite which is comercially known as "KeuchangSuk" was used as workpiece throughout the tests. The results from the tests were described in terms of cutting depth and abrasive productivity. Authors tried to confirm the effects of the operational parameters of abrasive mass flow rate, water pressure, and traverse speed of nozzle on cutting depth and presented almost all the data obtained in the tests. Abrasive productivity can be defined as the area of kerf wall cut by unit weight of abrasive and is an important factor to evaluated the cutting ability of abrasive and assess the cost effectiveness of an AWJ system. In the tests the maximum abrasive productivities of garnet, alumina, and silicon carbide were about 0.21, 0.24, and 0.20 $\textrm{cm}^2$ respectively under similar operational conditions.onditions.

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Development of Laser Process and System for Stencil Manufacturing

  • Lee, Jae-Hoon;Jeong Suh;Shin, Dong-Sig;Kim, Jeon-O;Lee, Young-Moon
    • International Journal of Precision Engineering and Manufacturing
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    • 제4권1호
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    • pp.23-29
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    • 2003
  • Stencil is used normally as a mask for solder pasting on pad of a printed circuit board (PCB). The objective of this study is to develop a stencil cutting system and determine the optimal conditions to make good-quality stencil by using a Nd:YAG laser. The effects of process parameters such as laser power, type of mask, gas pressure, cutting speed and pulse duration on the cut edge quality were investigated. In order to analyze the cut surface characteristics (roughness, kerfwidth, dross) optical microscopy, SEM microscopy and roughness measurements were used. As a result, the optimal conditions of cutting process parameters were determined, and the practical feasibility of the proposed system was also examined by using a commercial Gerber file for PCB stencil manufacturing.

레이저를 이용한 박강판의 절단특성 (Laser Cutting Characteristics of Cold Rolled Steel Sheets)

  • 이기호;김기철;이종훈
    • Journal of Welding and Joining
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    • 제13권4호
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    • pp.113-121
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    • 1995
  • This study deals with the quality and the optimum range of laser cutting process. Cold rolled steel sheets for automobile application were cut by a high power CO$_{2}$ laser system with beam quality of TEM$_{\infty}$ mode. Both process parameters such as travel speed and assist gas pressure, and quality factors were considered to optimize the laser cutting. It was revealed that the thinner the sheet thickness, the less effect of oxidation energy for contributing the cutting process. High speed photographs demonstrated that molten spot on the cut surface moved in a random and vigorous manner according to its viscosity and the flowing direction of assist gas, which resulted in so called striation. Laser cutting produced a very smooth surface of average roughness(Ra) about less than 1.5.mu.m at the optimum range. It was also shown that the characteristics of dross formation was influenced by the flowing durection of assist gas and the fluidity of molten metal drop..

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