• Title/Summary/Keyword: Cutting method

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An Experimental Verification on the Development of an Innovative Diamond Wire Saw Cutting Technology (새로운 다이아몬드 와이어 쏘 절단 기술 개발에 관한 실험적 검증)

  • Park, Jong Hyup;Chu, Baeksuk
    • Journal of the Korean Society of Manufacturing Process Engineers
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    • v.17 no.6
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    • pp.83-90
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    • 2018
  • This paper introduces a innovative diamond wire saw cutting technology and its experimental verification that can be utilized for cutting heavy structures. While conventional diamond wire saw cutting technologies such as water cooled cutting method and dry cutting method cause severe environmental problems due to generating massive concrete sludge or dust scattering, the proposed method can eliminate those problems considerably. Through extensive experiments using heavy structure test bed and real bridge pier structure, comprehensive analysis and comparative evaluation about various cutting methods were performed. As a result, the innovative diamond wire saw cutting method could achieve a similar cutting and cooling performance to the water cooled cutting method without generating concrete sludge and it showed an improved cutting and cooling performance to the dry cutting method without dust scattering. Consequently it is confirmed that the suggested cutting technology can be a promising environment-friendly alternative in the field of heavy structure dismantling.

On the Root Development of the Rice Plants(Oryza sativa L.) in Different Varieties Cultivated at the Saline Paddy Field (간탁답에서 생육된 수도근군형성의 품종간 차에 대하여)

  • ;Bong-Ku Kim
    • KOREAN JOURNAL OF CROP SCIENCE
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    • v.27 no.3
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    • pp.218-222
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    • 1982
  • It has been ascertained by a few researchers that soil salinities of the saline paddy fields have some effects upon the root development of the rice plants. But much is not known about the root formations of the rice plants in different varieties cultivated at the saline paddy field. Therefore this experiments were conducted to study the salinity tolerance of rice plants via variety test. Tested varieties were Akibare, Jinheung, Milyang #30, Josaeng Tongil, Suweon #264 and Suweon #287. And testing methods were cultivation experiment at the saline paddy field and leaf-cutting method at the laboratory. The results of cultivation experiment showed Milyang #30 and Josaeng Tongil were superior to others in root formation, and those of leaf-cutting method revealed that Josaeng Tongil and Mi1yang #30 were also superior to others in root formation and root length.

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Development of Production System for Eco-friendly Ocher Tiles (친환경 황토타일 생산 제조시스템개발)

  • Han, Jae-Ho;Kim, Hang-Woo;Lee, Yeon-Shin
    • Journal of the Korean Society of Manufacturing Technology Engineers
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    • v.24 no.2
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    • pp.256-262
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    • 2015
  • This study has an innovative improvement of the ocher tiles production system that aims to resolve social issue of industrial waste and to meet the customer needs for environmental-friendly building materials. By changing a wet type cutting method to a dry type of ocher tiles production system, the three processes such as cleaning, dehydration, and drying can be removed in existing overall process of 17 steps. Accordingly, the application of the wet type cutting method, which is proposed in this study, makes an increase in ocher tiles production from 1,500 to 1,850 pieces per hour. In particular, industrial wastewater that was emerging as the biggest problem in environmental pollutants in the wet cutting method has been removed. In addition, the most serious problems of noise and dust from the operator side, while developing a device for the dry cutting method, are eliminated through the development of additional equipment.

Stuides on the Cutting Methods of the Self-feeding Type Combine -on the Mixed Cutting Method (1)-on the Mixed Cutting Method(I) (자탈형 콤바인의 예취작업법에 관한 연구 -혼합예취법을 중심으로 (제1보)-)

  • 최복연
    • Magazine of the Korean Society of Agricultural Engineers
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    • v.18 no.2
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    • pp.4096-4104
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    • 1976
  • This experiment was carried out to investigate the efficient turning method which will be able to use every cutting methods, to calculate the width of the center field which must transpose from rotary cutting method to return cutting method, to investigate the effects of L/W and unit field on the operation efficiency. The results are summarized as follows: 1. In case of cutting in the outer field, the efficient turning method is the "$\alpha$" type turning method (half U-shaped turning method) at the first rotation, is the "$\beta$" type turning method (T-shaped turning method) at the second to fourth rotation. 2. In case of cutting in the inner field, the efficient turning method which takes the least turning time is the "a" type turning method ($\Delta$-shaped turning method). 3. The width of the center field (W') changes by the length-width ratio (L/W) and width (W), W' is 9.0m in case that L/W is 2.5 and W is 30m. 4. The larger L/W and area of unit field (A) become, the more operation efficiency (E) increases, and the limits that E is affected signicantly by L/W is 2 to 3.5 and A is within 5,000$m^2$. within 5,000$m^2$.

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A Study of Cutting Methods by Comparing the Contents of Cinnamic acid and Cinnamaldehyde in Different Parts of Cinnamomi Ramulus (Cinnamic acid, Cinnamaldehyde의 부위별 정량을 통한 계지(桂枝)의 음편(飮片) 규격 연구)

  • Kim, Young-Sik;Lee, Guem-San;Kim, Jung-Hoon;Choi, Go-Ya;Jeong, Seung-Il;Cho, Su-In;Ju, Young-Sung;Kim, Hong-Jun
    • The Korea Journal of Herbology
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    • v.26 no.2
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    • pp.11-15
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    • 2011
  • Objectives : In the present study, the contents of cinnamic acid and cinnamaldehyde in three different parts of Cinnamomi Ramulus (CR) (the whole body, the bark part, and the wood part) was evaluated using UPLC (ultra performance liquid chromatography) in order to investigate a suitable cutting method. Methods : Analysis was performed on SMART LC with UV detector. Reference compounds were separated on Inertsil ODS-4 column ($2.1mm{\times}50mm$, $3{\mu}m$, GL Science, Japan) using isolation elution with water and acetonitrile each containing acetic acid at a flow rate of $500{\mu}L/min$. Additionally, samples of CR were purchased from pharmacy of medicinal herb. Results : The correlation coefficients of the cinnamic acid and cinnamaldehyde levels showed good linearity ($r^2{\geq}0.9999$) over the linear ranges. Furthermore, the bark part exhibited higher concentration levels of reference compounds than the wood part in all samples. In addition the bark exfoliation rates in oblique and perpendicular-long cut samples of CR were lower than the perpendicular-short cut samples. Conclusions : These results suggested that the optimal cutting method would be able to reduce the bark exfoliation. Therefore, the oblique or perpendicular-long cutting method is considered to be a better cutting type than the perpendicular-short cutting method.

A Study on Development of 3-D Simulator for H-Beam Robot Cutting and Optimization of Cutting Using the Simulator (H-beam 로봇 절단용 3차원 시뮬레이터의 개발과 이를 이용한 절단 최적화에 관한 연구)

  • Park, Ju-Yong;Kim, Yong-Uk
    • Journal of Welding and Joining
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    • v.30 no.4
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    • pp.44-48
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    • 2012
  • H-beam used for stiffening the upper structure of ocean plant is cut in the various shapes. The cutting process of the H-beam is done manually and requires a long time and high cost. Therefore, automation of H-beam cutting is an important task. This research aims to develop a 3-D simulator to build the automatic H-beam cutting system and to determine the optimal cutting method. The automatic H-beam cutting system composes of 6 robots including 2 cutting robots hang to a crane and 1 conveyer. The appropriate system layout for covering the various sizes and types of H-beam was tested and determined using the simulator. The H-beam cutting system uses a hybrid type of plasma and gas cutting because of special cutting shapes of H-beam. The cutting area of each cutting method should be properly divided according to the size and shape of H-beam to shorten the total cutting time. Additionally the collision between a robot and a robot or a robot and H-beam should be avoided. The optimal cutting method for the shortest cutting time without the collision could be found for the various cutting conditions by use of the simulator. 2 simulation samples shows the availability of the simulator to find the optimal cutting method.

A study on evaluation of roundness characteristics about precise machined parts (정밀가공 부품의 진원도 특성 평가에 관한 연구)

  • Oh SangLok;Lee Gab-jo;Kim Jong-Kwan
    • Proceedings of the Korean Society of Machine Tool Engineers Conference
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    • 2005.05a
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    • pp.209-215
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    • 2005
  • The dimensions and forms of precise machined parts are different to kinds of machine. It will be variant according to machine wear, tool form, cutting method and cutting condition at the same machine. At that time, the most important things are controlled and measured by appropriate measuring instruments. This paper aims to contribute to improving measurement accuracy through evaluation and consideration about various roundness in the machining company.

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The Minimizing of Cutting Depth using Vibration Cutting (진동절삭법을 이용한 절삭깊이의 최소화)

  • 손성민;안중환
    • Journal of the Korean Society for Precision Engineering
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    • v.21 no.11
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    • pp.38-45
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    • 2004
  • This paper discusses the minimum cutting thickness with a continuous chip in sub-micrometer order precision diamond cutting. An ultra precision cutting model is proposed, in which the tool edge radius and the friction coefficient are the principal factors determining the minimum cutting thickness. The experimental results verify the proposed model and provide various supporting evidence. In order to reduce the minimum cutting thickness a vibration cutting method is applied, and the effects are investigated through a series of experiments under the same conditions as conventional cutting method.

COMPARISON OF INDICATING NET SHAPING (망지 사단방법의 비교)

  • KO Kwan Soh
    • Korean Journal of Fisheries and Aquatic Sciences
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    • v.1 no.2
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    • pp.129-133
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    • 1968
  • The writer reviewed the cutting method of webbing practiced in major countries. Cutting rhythm Bar cutting to Point Cutting) should be chosen to approach as straight as possible, therefore the knot cuttings or the side cuttings should be 1, if possile. According to calculation, an arbitrary solution to a mixed cutting was undertaken, while another cutting method, of calculation 5 and 6, was taken by a prepared table. In no case, it was consequently possible to use an unmixed cutting rhythm. Sometimes, the cutting calculated from approximate value differs from desired result, tut this defference should not be taken too significant in practice.

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Slip Failure Strength of Infilled Concrete with Reinforced PHC Pile by One-Cutting Method (원커팅 철근보강 PHC 말뚝의 속채움 콘크리트 부착파괴 성능)

  • Chun, Young-Soo;Sim, Young-Jong;Park, Jong-Bae
    • LHI Journal of Land, Housing, and Urban Affairs
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    • v.2 no.4
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    • pp.553-558
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    • 2011
  • Existing method protruding strands that are embedded in PHC pile to connect pile head and foundation slab shows poor constructibility. As this causes crack and damage in pile head and casualties often occurs in construction site during the work, alternative method called one-cutting method, in which pile above the ground surface and strands embedded in pile are completely cut and pile head is reinforced with rebar for connection with foundation slab, is currently adopted. However, the capacity of details for these methods are not mechanically proved. In this study, in order to suggest proper details of reinforcement for one-cutting method, failures due to lack of shear resistance between infilled concrete and PHC pile are analyzed through experiments and embedded depth with infilled concrete inside PHC pile is suggested. Assuming that slip failure strength is 0.4MPa, which is obtained from experiment conservatively, to have rebar yielded before slip failure, minimum depth of infilled concrete for PHC 450 and PHC 500, need to be 600mm above, and for PHC 600, 1,000mm above.