• Title/Summary/Keyword: Laser cutting

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A Study on the Development of an Expert System for $CO_2$ Laser Cutting ($CO_2$레이저 절단을 위한 전문가 시스템 개발에 관한 연구)

  • 최은석;한국찬;나석주
    • Journal of Welding and Joining
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    • v.12 no.3
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    • pp.71-81
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    • 1994
  • Laser cutting is experiencing a rising worldwide acceptance in the industry. Expert systems are necessary for the systematic arrangement and searching of experimental data existing in journal papers, job handbooks, etc.. This paper proposes an expert system for the selection of the appropriate laser cutting variables from the available database. Optimum cutting conditions according to the given cutting velocity were searched and qualitative comments which are difficult to be used as database variables were shown at each velocity using the binary and fuzzy inference. These comments could be informative to unskilled operators of the laser cutting process. Typical cutting conditions of the mild steel and stainless steel were included and the working range and quality variations were displayed graphically. The proposed algorithm was implemented in an IBM compatible personal computer as an expert system for CO$_{2}$ laser cutting to derive the optimum cutting conditions by using the turbo prolog.

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Development of modern bag design using cultural content from Baekje - Focusing on laser-cutting techniques - (백제 문화콘텐츠의 현대적 활용을 위한 가방 디자인 개발 - 레이저커팅 기법을 중심으로-)

  • Ha, Seung Yeon
    • The Research Journal of the Costume Culture
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    • v.28 no.6
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    • pp.738-754
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    • 2020
  • As a cultural feature of, the relics of the Royal Tomb of King Muryeong are suitable design content for applying with sophisticated production and delicate molding laser cutting techniques. The purpose of this study is to develop modern bag designs using relics of the Royal Tomb of King Muryeong of Baekje using laser-cutting techniques. First, the historical background and meaning of Baekje's cultural content were explored. Second, the principle of laser-cutting techniques were explored, laser-cutting techniques applied to modern fashion and bag design were examined, and bag design characteristics were analyzed. Third, based on prior research, the criteria for the development of bag design, from which eight bag design were developed that combine modern popularity and functionality utilizing Baekje cultural content and using laser-cutting techniques to apply the textile design developed by researchers in 2013 (modified to match laser-cutting techniques). The research results show that bag were clutch, tote, shoulder, and mini. Gold, silver, brown, beige, and navy colors were arranged, based on black/white contrast. Cow, lambskin, washed snakeskin, mesh, and Saffiano leather were used. For the pattern-applying technique, this study showed that a new digital technique, which is laser-cutting techniques could be combined with contemporary bag designs. Moreover, a bag design was developed that has a modern sense and functionality as well as Korean formativeness, which is significant.

CNC Torch Path Generation for Laser Cutting of Planar Shapes (2차원 자유형상의 레이저 절단을 위한 CNC 공구경로 생성)

  • Park, Hyung-Jun;Ahn, Dong-Gyu
    • Korean Journal of Computational Design and Engineering
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    • v.12 no.3
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    • pp.153-162
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    • 2007
  • In this paper, we propose a knowledge-based method for generating CNC torch path for laser cutting of the outlines of planar shapes. The proposed method consists of two main phases: laser cutting knowledge construction and CNC torch path generation using the knowledge. In the first phase, cutting experiments are conducted on various operating parameters, and then empirical data are stored and analyzed to make up the knowledge of laser cutting. With this knowledge, we can inquire what a kerf width is for specific operating parameters. In the second phase, using the knowledge of laser cutting, CNC torch path is generated for cutting the outlines of the given planar shapes. This phase is basically based on the offset generation of each outline by a sequence of arc splines, where the offset distance is the same as the half of the kerf width determined from the constructed knowledge. The proposed method based on laser cutting knowledge makes full use of arc interpolators in CNC torch path generation. The method can efficiently reduce the number of path segments while keeping the torch path within the desired accuracy.

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
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    • v.19 no.4
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    • pp.109-119
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    • 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.

A study on the optimal cutting condition of a high speed feeding type laser cutting machine by using Taguchi method

  • Lim Sang-Heon;Lee Choon-Man;Chung Won Jee
    • International Journal of Precision Engineering and Manufacturing
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    • v.7 no.1
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    • pp.18-23
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    • 2006
  • Cutting by a high speed laser cutting machine is one of most effective technologies to improve productivity. This paper has presented the cutting characteristics and optimal cutting conditions in a high speed feeding type laser cutting machine by using Tacuchi method in the design of experiment. An L9(34) orthogonal array is adopted to study the effect of adjustment parameters. The adjustment parameters consist of cutting speed, laser power, laser output duty and assistant gas pressure. The surface roughness of sheet metal is regarded as a quality feature. Analysis of variance is performed in order to evaluate the effect of adjustment parameters on the quality feature of laser cutting process.

Integrated Automation System of Pattern Design and $CO_2$ Laser Cutting for Diving Suits (잠수복 패턴 자동 설계 및 $CO_2$ 레이저 절단을 위한 통합 시스템 개발)

  • 윤세봉;강병수;강재관;김여숙
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • pp.409-412
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    • 2004
  • In this paper, an integrated automation system of pattern design and $CO_2$ laser cutting for diving suits is presented. Pattern design includes grading which creates a full-size range from a base pattern. Tool path for laser cutting from the patterns is generated in G-code format. $CO_2$ Laser cutting machine is developed to help cut the patterns with accuracy and speed. Aluminum profiles, ball screws, and stepping motors are engaged into the machine as frame structure, transfer unit, and driving devices respectively. The developed system is tested in dry suit cutting, convincing it can be readily introduced in driving suits manufacturing with respect to cost and efficiency.

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Cutting Motion Simulator for Nutating Head Type S-axis CNC Laser Cutting Machine (Nutating 헤드 타입 5축 CNC 레이저 절단기용 동작 시뮬레이터)

  • Kang, Jae-Gwan
    • Journal of the Society of Korea Industrial and Systems Engineering
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    • v.34 no.3
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    • pp.35-40
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    • 2011
  • 5-axis laser cutting has great advantages when it is applied to three dimensional machining requiring high cutting quality. For developing 5-axis CNC laser cutting systems, however, many problems such as rotating a laser head or a working table, 5-axis servo-control mechanism, tool path generation and post-processing, and collision avoidance between a laser head and a work-piece should be solved. In this paper, we deal with developing a motion simulator for 5-axis laser cutting machine with a nutating cutting head whose rotational axis is in an inclined plane. Two essential modules such as post-processor and cutting motion simulator was developed based on a commercial 3D CAD of UG-NX. The developed system was applied to three dimensional cutting products and showed the validity of the developed methods.

A Study on the Optimal Cutting Condition of High Speed Feeding Type Laser Cutting Machine by Taguchi Method (다구찌 방법을 이용한 고속 이송방식 레이저 절단기의 최적 절단 조건에 관한 연구)

  • 임상헌;박동근;이춘만
    • Journal of the Korean Society for Precision Engineering
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    • v.21 no.6
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    • pp.77-83
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    • 2004
  • Cutting by a high speed laser cutting machine is one of most effective technologies to improve productivity. This paper has studied to obtain the cutting characteristics and optimal cutting conditions in a high speed feeding type laser cutting machine by Tacuchi method in design of experiments. A Lf(34) orthogonal array is adopted to study the effect of adjustment parameter. The adjustment parameters consist of cutting speed, laser power, laser output duty and assistant gas pressure. And the quality feature is selected as surface roughness of sheet metal. Variance analysis is performed in order to evaluate the effect of adjustment parameters on the quality feature of laser cutting process.

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

  • 이기호;김기철;이종훈
    • Journal of Welding and Joining
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    • v.13 no.4
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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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A Study on Cutting Characteristics Evaluation of High Speed Feeing Type Laser Cutting M/C (고속 이송 방식 Laser Cutting M/C의 절단성 평가에 관한 연구)

  • 이춘만;임상헌
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • pp.1820-1823
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    • 2003
  • A high speed feeding type laser cutting M/C is developed for precise cutting of sheet metal. This paper has been carried out to obtain cutting characteristics and optimal cutting conditions of the developed high speed feeding type laser cutting M/C by a design of experiments. Cutting speed. laser power. laser duty and gas pressure are control factors for the surface roughness. The major factors affecting the surface roughness and the optimum cutting conditions are studied with minimum experiments using Taguchi method.

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