• Title/Summary/Keyword: Manufacturing condition

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A Study on the Deposition Conditions on Joint Strength of Polyimide Substrate and ZnO Thin Film (Polyimide 기판과 ZnO 박막의 접합강도에 미치는 증착조건에 관한 연구)

  • Hur, Jang-Wook
    • Journal of the Korean Society of Manufacturing Process Engineers
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    • v.12 no.2
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    • pp.62-67
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    • 2013
  • The influence of internal stress and joint strength(shear, tensile) according to the deposition conditions was investigated by the Polyimide substrate and ZnO thin film. Deposition thickness and temperature affect the internal stress and the internal stress was minimum at the 60nm and $200^{\circ}C$ of the deposition conditions. Tensile strength is large at the deposition condition that shear strength is large and the shear strength was about 50% of the tensile strength. The shear strength and tensile strength were large at deposition condition that internal stress was small. Crack occurred near the joint interface of Polyimide substrate and progressed along the interface until the final fracture.

Presumption for Mutual Relation of the End-Milling Condition on Surface Roughness of Al Alloy by Regression Analysis (회귀분석을 이용한 Al 합금의 표면거칠기에 미치는 엔드밀 가공조건의 상관관계 추정)

  • 이상재;배효준;박흥식;전태옥
    • Transactions of the Korean Society of Machine Tool Engineers
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    • v.12 no.5
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    • pp.46-52
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    • 2003
  • End-milling have been used widely in industrial system because it is effective to a material manufacturing with various shape. Recently the end-milling processing is needed the high-precise technique with good surface roughness and rapid time in precision machine part and electronic part. The optimum surface roughness has an effect on end-milling condition such as, cutting direction spindle speed, feed rate and depth of cut, etc. Therefore this study was carried out to presume for mutual relation of end-milling condition to get the optimum surface roughness by regression analysis. The results shown that coefficient of determination($\textrm{R}^2$) of regression equation has a fine reliability of 87.5% and regression equation of surface rough is made by regression analysis.

A Study on Manufacturing Problem Solving of Scaffold with Pore Using 3SC Practical TRIZ and Machine Learning (3SC 실용트리즈와 머신러닝을 이용한 기공을 가진 인공지지체 제조문제 해결에 관한 연구)

  • Lee, Song-Yeon;Huh, Yong Jeong
    • Journal of the Semiconductor & Display Technology
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    • v.18 no.3
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    • pp.25-30
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    • 2019
  • In this paper, we have analyzed manufacturing problems of the scaffold with pores using FDM 3D printer and PLGA. We suggested the solutions using 3SC practical TRIZ. We selected the final solution used machine learning. We reduced number of experiments using most influential factor after analysis print factors. We printed the scaffold and measured pore size. We created the regression model using python tensorflow. The print condition data of measured pore size was used as training data. We predicted the pore size of printed condition using regression model. We printed the scaffold using the predicted the print condition data. We quantitatively compare the predicted scaffold pore size data and the measured scaffold pore size data. We got satisfactory result.

A Study on the Monitoring Technology for the Continuous Detection of Grinding Process (연삭 공정의 연속 진단을 위한 모니터링에 관한 연구)

  • 강재훈
    • Journal of the Korean Society of Manufacturing Technology Engineers
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    • v.8 no.1
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    • pp.74-80
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    • 1999
  • Recently, manufacturing work has been transformed to small scale production form with various types to act up to user's expectation from mass production with a little items required in the past. Then FMS using NC type machinaries has been applied actively also in domestic manufacturing line to meet thus tendency, but there are many machining troubles occured during work process not be settled yet. Nowdays high efficiently has been required no less than high precision in grinding work for the improvement of productivity. In this study, to represent more advance FMS can be adapted to thus situation In-process type monitoring method using AE and Current sensors is suggested to investigate the machining condition in grinding process. As results form this experimental study, it is recognized well that grinding conditions and dressing point of in time cab be estimated effectively using monitoring method suggested. Furthermore, surface shape of grinding wheel on voluntary point of in time can be predicted indirectly through the observation and comparison of AE signal waveform obtained as performance of continuous dressing work.

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The Quality of the Information Sharing between the Korean Apparel Manufatures and the Contractors (국내 의류 제조업체와 생산 협력업체간 정보 공유 특성)

  • Hur, Jhee-Hye;Chun, Jong-Suk
    • The Research Journal of the Costume Culture
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    • v.13 no.1
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    • pp.150-160
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    • 2005
  • As apparel manufacturers have increased their outsourcing garment making to cope with the rapid changing market, the information sharing has been the most important factor for the Korean apparel industry. The purpose of this research was to study the present state and the needs of the information sharing between the apparel manufacturers and the contractors; and the relationship between the product property (basic/fashion product) and the information sharing property. A total of 86 Korean apparel manufacturers were surveyed for the study. The results are: 1) the information sharing level on manufacturing capacity, manufacturing processing condition, and product quality were a bit higher than other surveyed information, but the level on inventories and sales were lower than others. in addition, the information sharing needs by online system of manufacturing capacity, manufacturing processing condition, and product quality were greater than other information; 2) In the case of fashion product, the information sharing needs of product quality by online system were much greater than in the case of basic product. This study is expected to help apparel manufacturers to construct their information sharing system which is apt for their product property and needs.

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Mechanical Property and Microstructure of the Annealed Fe-Si Alloy Manufactured by Laser-Powder Bed Fusion (L-PBF 공정 처리된 Fe-Si 합금의 열처리 조건에 따른 미세조직 및 기계적 특성)

  • J. Y. Park;M. S. Gwak;S. G. Jeong;H. S. Kim;J. G. Kim
    • Transactions of Materials Processing
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    • v.32 no.2
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    • pp.67-73
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    • 2023
  • To overcome a climate change, manufacturing complex-shaped electric mobility parts becomes one of the important issues for enhancing a performance of motor with reducing their weight. Therefore, development of laser-based additive manufacturing shed on light due to their flexible manufacturing capacity that can be suitable to solve the poor formability of Fe-Si alloys for electric mobility parts. Although there are several studies existed to optimize the performance of additively manufactured Fe-Si alloys, the post-annealing effect was not well investigated yet though this is important to control the texture and mechanical properties of additively manufactured parts. In the present work, annealing effect on the mechanical property and microstructure of additively manufactured Fe-4.5Si alloy was investigated. Because of the ordered phase initiation after annealing, the hardness of additively manufactured Fe-4.5Si alloy increased up to 1173 K while a hardness drop occurs at the 1273 K condition due to the micro-crack initiation. The response surface methodology result represents the 1173 K-5 h sample is an optimal condition to maximize the mechanical property of additively manufactured alloy without micro-cracks.

Improvement of Selection System of Waterproofing Methods for Concrete Structure (지하 콘크리트 구조물의 적정 방수공법 선정을 위한 평가시스템 제안에 관한 연구)

  • Oh, Sang-Keun;Kwak, Kyu-Sung;Choi, Sung-Min;Kwon, Shi-Won
    • Journal of the Korea Institute of Building Construction
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    • v.7 no.1 s.23
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    • pp.99-106
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    • 2007
  • Water leakage could be caused deterioration of environmental conditions, user condition, reduction of life span and long term safety in underground concrete structure. Many materials and construction method to repair on these problems have been developed, however, it is not proper to successful repair or raise problem of increasing repair cost However, there are many limitations as practical appraisal methods due to different view of reliability for test methods. Because, it was not enough that the technical objectivity could be lack and also application of environmental condition is inadequate. In this paper, we suggest varied test methods divided to appraisal for property of matter, construction, manufacturing, specification and maintenance, friendly environmental condition. It could be more practical as a objective standard considering various angles. In summery, it should be subdivided and differentiated to accomplish proper application and to select proper materials and construction method for repair even if the synthetical condition is very complicated.

Optimal Cutting Condition of Tool Life in the High Speed Machining by Taguchi Design of Experiments (다구찌 실험 계획법을 이용한 고속가공에서 공구수명 조건의 최적화)

  • Lim, Pyo;Yang, Gyun-Eui
    • Journal of the Korean Society of Manufacturing Process Engineers
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    • v.5 no.4
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    • pp.59-64
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    • 2006
  • High Speed Machining(HSM) reduces machining time and improves surface accuracy because of the high cutting speed and feedrate. Development of HSM makes it allowable to machine difficult-to-cut material and use small-size-endmill. It is however limited to cutting condition and tool material. In the machining operation, it is important to check main parameter of tool life and select optimal cutting condition because tool breakage can interrupt progression of operation. In this study, cutting parameters are determined to 3 factors and 3 levels which are a spindle speed, a feedrate and a width of cut. Experiment is designed to orthogonal array table for L9 with 3 outer array using Taguchi method. Also, it is proposed to inspect significance of the optimal factors and levels by ANOVA using average of SN ratio for tool life. Finally, estimated value of SN ratio in the optimal cutting condition is compared with measured one in the floor shop and reduction of loss is predicted.

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The Study on the Machining Characteristics of 300mm Wafer Polishing for Optimal Machining Condition (최적 가공 조건 선정을 위한 300mm 웨이퍼 폴리싱의 가공특성 연구)

  • Won, Jong-Koo;Lee, Jung-Taik;Lee, Eun-Sang
    • Transactions of the Korean Society of Machine Tool Engineers
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    • v.17 no.2
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    • pp.1-6
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    • 2008
  • In recent years, developments in the semiconductor and electronic industries have brought a rapid increase in the use of large size silicon wafer. For further improvement of the ultra precision surface and flatness of Si wafer necessary to high density ULSI, it is known that polishing is very important. However, most of these investigation was experiment less than 300mm diameter. Polishing is one of the important methods in manufacturing of Si wafers and in thinning of completed device wafers. This study reports the machining variables that has major influence on the characteristic of wafer polishing. It was adapted to polishing pressure, machining speed, and the slurry mix ratio, the optimum condition is selected by ultra precision wafer polishing using load cell and infrared temperature sensor. The optimum machining condition is selected a result data that use a pressure and table speed data. By using optimum condition, it achieves a ultra precision mirror like surface.

Structural Design of a Dental Implant (2): Test Drafting and Manufacturing (치과용 임플란트 구조설계 (2): 시험설계 및 가공제작)

  • Kwon, Young-Joo
    • Journal of the Computational Structural Engineering Institute of Korea
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    • v.25 no.5
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    • pp.433-438
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    • 2012
  • This paper is the second paper among two papers which constitute the paper about the structural design of a dental implant. This paper completed the test drafting for the structural model of the new dental implant whose structural performance was confirmed and verified through the comparative structural analysis carried out in the first paper. This paper finished the structural design of a dental implant by manufacturing the dental implant using CNC machines and so forth on the basis of the completed draft and finally by evaluating the machining condition of the dental implant. The drafting work was performed using MDT(Mechanical Desk Top). The manufacturing work was carried out using CNC machines, general purpose milling machine, and Wire EDM. The manufactured surface condition of the dental implant was evaluated and confirmed finally using an electron microscope. As a result of evaluation, a testing dental implant with very good condition was designed and manufactured.