• Title/Summary/Keyword: cutting methods

Search Result 882, Processing Time 0.038 seconds

A Study on the Machining Accuracy Evaluation Method of High Speed Machining (고속가공 시스템의 가공정밀도 평가방법에 관한 연구)

  • 손덕수;유중학;최성주;이우영
    • Proceedings of the Korean Society of Precision Engineering Conference
    • /
    • 2002.05a
    • /
    • pp.94-99
    • /
    • 2002
  • KS and ISO have proposed several evaluation methods of conventional machine tools. Even though the accuracy of the tools can be evaluated with these methods, there are still no proper evaluation methods of high speed machining. Because it is hard to evaluate characteristics of high speed machining such as decrease of cutting temperature, cutting force, and reduced machining time. Therefore, new evaluation method for high speed machine should be developed. In this paper, several shapes of model have been proposed to evaluate cutting accuracy of high speed machine.

  • PDF

Extraction of Information on Road Cutting Slope using RC Helicopter Photographic Surveying System (무선조정 헬리콥터 사진측량시스템을 이용한 절취사면 정보 추출)

  • 이종출;이영도;김진수;조용재
    • Proceedings of the Korean Society of Surveying, Geodesy, Photogrammetry, and Cartography Conference
    • /
    • 2004.11a
    • /
    • pp.217-222
    • /
    • 2004
  • In this study, cutting slope's digital image has acquired by using video camera attached at RC helicopter. Resulted RMSE from image processing was approximately x-direction 0.27m, y-direction 0.23m and z-direction 0.35m. Application of these methods makes it convenient that acquisition of digital image about before and after the construction work of road cutting slope. Also systematical cutting slope's information acquisition will be possible by cutting slope's quantitative and qualitative analysis.

  • PDF

A Study on Changes of Drape Shapes and Physical Properties by Applying Laser-Cutting Technique on Neoprene Materials (네오프렌 소재의 레이저 커팅기법 적용에 따른 물성 및 드레이프 형상 변화 연구)

  • Han, Yoojung;Kim, Jongjun
    • Journal of Fashion Business
    • /
    • v.19 no.4
    • /
    • pp.109-119
    • /
    • 2015
  • A wide variety of fashion materials focus on good drape property and softness. Among the recently emerging materials, Neoprene that consists of laminated knit on both sides of foamed neoprene sheet seeks a unique appearance that is considerably deviated from the current flow. Diverse processing methods for the newly released material heighten the value in function and beauty among trends of fashion materials by enhancing the appearance, touch and material property. Laser-cutting technique is one of the processing methods that is consistently used in the textile area. This study aimed to find the basic materials for applicability of laser-cutting technique to clothing goods after consideration of the changes in material property and drape shape, and to furthermore enforce different pattern conditions to Neoprene material, one of the newly attractive materials in the fashion area. In this study, we applied laser-cutting technique to Neoprene material sample under different conditions of pattern appearance, size and distance, based on current evaluation and theoretical background of Neoprene material, fashion trend and laser-cutting technique. Drape property can improve and the drape direction could also be controlled by a wide variety of laser-cutting techniques applied to Neoprene materials that have uniquely different appearances from most other textiles. This technique could be applied to the design for diversification of Neoprene clothing goods in the future.

Applications of Zero Waste Pattern Cutting Methods for Women's Shirts (제로 웨이스트 패턴 커팅 방법을 활용한 셔츠 디자인 연구)

  • Jiang, Nan;Park, Eun Kyung
    • Journal of the Korean Society of Clothing and Textiles
    • /
    • v.44 no.5
    • /
    • pp.969-983
    • /
    • 2020
  • Zero waste fashion design to minimize the 15% fabric waste generated during production can be difficult to industrialize instead of having strong originality. This study designed shirts that are practical and reflect trends using the zero waste pattern cutting method and suggest the possibilities for industrial production. The content of the study are as follows. First, the pattern cutting method of zero waste fashion design was studied. Second, the recent trends of shirt design were analyzed and reflected in the design development. Third, 4 zero waste shirt designs were developed and produced by applying the geometric cutting, puzzle cutting, and minimal cutting methods. As for the research method, literature research was conducted on related references; in addition, design development and production were conducted empirically. As a result, the developed zero waste shirts are practical and trendy. In addition, the results of the study are meaningful to provide basic data for the commercialization and industrial application of zero waste fashion design.

A Study on the Behaviors of Acoustic Emission Signals and Cutting Forces by Flank Wear in Turing Process (선삭가공시 플랭크 마모에 따른 AE 신호와 절삭력의 거동에 관한 연구 1)

  • Cho, Jong-Rae;Won, Jong-Sik;Jung, Youn-Gyo
    • Journal of the Korean Society for Precision Engineering
    • /
    • v.16 no.1 s.94
    • /
    • pp.26-33
    • /
    • 1999
  • Automatic monitoring of cutting process is one of the most important technologies for increasing the stability and the reliability of unmanned manufacturing system. In this study, basic methods which use the acoustic emission (AE) signals and cutting forces were proposed to monitor flank wear (width of flank wear) quantiatively. First, in order to detect flank wear, it was investigated that the influence of cutting conditions, that is, cutting velocity, feed and depth of cut, on AE signals (${AE_rms}$) and cutting forces. Furthermore, the relation between flank wear and the measured signals (${AE_rms}$, cutting force) was discussed.

  • PDF

Effect of Cooling Method on Surface Roughness in Turning (선삭가공에서 표면 거칠기에 미치는 냉각방법의 영향)

  • Kim, Yeong-Duck
    • Journal of the Korean Society of Manufacturing Process Engineers
    • /
    • v.10 no.3
    • /
    • pp.87-93
    • /
    • 2011
  • CNC lathe machining has been widely used for parts machining of vehicles, aircraft, ships, electronics, etc. because cost savings for shortening processing time and increasing productivity are great. In this study, the purpose is to investigate the effect of cooling methods such as oil mist, water-soluble cutting oils on the workpiece surface roughness with the cutting speed, cutting depth, tool nose radius and feed rate of CNC lathe machine as a parameter in the cutting process of the aluminum alloy 2024 which is used a lot recently on aircraft parts. It is found that oil mist is coolant and water-soluble cooled by cutting the experimental conditions, cutting speed and cutting depth without effecting the surface roughness value was constant.

Machining Technology of Free From Surface using Controlled of Cutting Speed (절삭속도 일정제어를 통한 자유곡명의 가공기술)

  • 김경균;강명창;이득우;정융호;김정석
    • Proceedings of the Korean Society of Precision Engineering Conference
    • /
    • 2000.11a
    • /
    • pp.806-809
    • /
    • 2000
  • The factors which can improve tool life in machining are consisted of tool geometries, tool materials, coating methods. cutting environments, cutting conditions and so on. Cutting speed in cutting conditions is one of the important factors which can directly influence on the tool life. This paper deals the machinability which is concerned about the cutting direction and the tilt angle of fret form surface in hot die steel(STD I I). The NC datum were analysrd and the effective tool diameters were calculated according to the change of tilt angle the program which can continue the cutting speed with the change of spindle revolution is developed.

  • PDF

Tool Wear in High Speed Face Milling Using CBN Tool (CBN 공구를 이용한 고속 정면밀링시의 공구마멸)

  • 최종순
    • Proceedings of the Korean Society of Machine Tool Engineers Conference
    • /
    • 2000.04a
    • /
    • pp.332-338
    • /
    • 2000
  • The high speed machining is now one of the most effective manufacturing methods to achive higher productivity. However, due to the increased cutting temperatures caused by increased cutting speed, tool wear become larger. Especially in high speed face milling, cutting tools are exposed not only to high cutting temperatures, but also to mechanical and thermal shock stresses. It is essential, therefore, to know the wear characteristics of tool materials in high speed machining. This study presents an experimental investigation of the cutting performance of CBN tools in high speed face milling of gray cast iron FC25. The effect of cutting conditions and cutting length on flank wear of CBN tools and roughness of machined surfaces is investigated. The cutting parameters involved were ; cutting speeds in the range of 600to 1800 m/min, feed of 0.1 mm/tooth, and depth of cut of 0.3mm.

  • PDF

Correlation analysis between cutting conditions and cylindricity in MQL turning (MQL 선삭가공에서 절삭조건과 원통도의 상관관계 분석)

  • Shin, Sung-Woo;Hwang, Young-Kug;Lee, Choon-Man
    • Journal of the Korean Society of Manufacturing Process Engineers
    • /
    • v.8 no.3
    • /
    • pp.74-81
    • /
    • 2009
  • At present, industries and researchers are looking for ways to reduce the use of lubricants because of ecological and economical reasons. Therefore, metal cutting is to move toward dry cutting or semi-dry cutting. One of the technologies is known as MQL machining. This paper presents an investigation into MQL machining with the objective of evaluating cylindricity and cooling effect for the turning process of SM45C. To reach this goal, cylindrical-outer-diameter turning experiments are carried out according to cutting conditions with fluid, MQL and dry machining methods. A cutting force, tool-shank temperature and cylindricity of workpiece are measured and analyzed. The correlation between cutting conditions and cylindricity are evaluated according to cooling lubricant environments.

  • PDF

Propagation Characteristics of Rare Plants Diabelia spathulata (Siebold & Zucc.) Landrein Applied by Seeding and Cutting Methods (종자파종과 삽목을 활용한 희귀식물 주걱댕강나무의 증식 특성)

  • Jeong Gul Jang;Myung Hoon Yi
    • Korean Journal of Plant Resources
    • /
    • v.36 no.4
    • /
    • pp.390-401
    • /
    • 2023
  • The purpose of this study was to identify the propagation characteristics of Diabelia spathulata (Siebold & Zucc.) Landrein through seeding and cutting methods. The seed germination rate was meager (0.22~3.56%). In hardwood cutting, the highest rooting rate was 36.1% in sand + perlite (2:1) and 37.8% in 1000 PPM of IBA pre-treatment. Softwood cutting showed the highest rooting rate when the cutting diameter was 3 to 5 mm and the cutting length was 7 to 8 cm. In particular, the highest rooting rate of 80% was observed in the sand among the 8 cultivation media treatments. In the case of root cuttings, the rooting rate was 83.3~96.7% in all cultivation media. The highest rooting rate was observed when the diameter of the cutting was 7 to 8 mm, and the length of the cutting was about 10 to 11 cm. Among cutting methods, root cutting showed the highest rooting rate. Division showed a 100% rooting rate regardless of size or growth status. For Diabelia spathulata (Siebold & Zucc.) Landrein, propagation by cuttings was more efficient than seeding. However, Further research on the morphophysiological dormancy and dormancy break of seeds is needed for seed propagation.