• 한국정밀공학회지
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• 제32권10호
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• pp.917-923
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• 2015

3D Printing has a great advantage for its capabilities in manufacturing complicated structures in a reasonable manufacturing time, and thus is widely used in various fields. Due to the high cost of the equipment and material, a fairly acceptable equipment, the Projection Stereolithography Apparatus (PSLA), has been developed, using the projection pattern approach for the purpose of quick manufacturing. We evaluated its surface quality, as compared with that of other systems. The result is the development of a high-performance, low-cost 3D Printer and its operating software, using LCD and UV LED. Working materials for an optimal manufacturing are suggested in the research, along with some suggestions of basic approaches for enhancing the accuracy and quality of the manufactured structures.

• Composites Research
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• 제27권6호
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• pp.231-235
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• 2014

오토클레이브 성형은 성형제품의 품질은 우수하나 생산비용이 비싸다는 단점이 있다. 생산비용 중에서도 큰 비중을 차지하는 것이 성형툴의 제작공정이다. 따라서 본 연구에서는 생산비용 절감을 위한 선행 연구로서 성형툴의 재질 및 표면상태에 따라 L-shape 제품의 성형후 Spring-in을 Abaqus user subroutine을 이용하여 계산하였고, 열팽창계수와 마찰계수에 따른 결과를 나타내었다. 또한 성형툴 제작시 재질 및 표면상태의 기준점을 제시하여 생산비용을 줄이는데 기여하고자 한다.

• 한국가스학회지
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• 제16권6호
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• pp.80-86
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• 2012

주요 설비를 설치 이전하거나 구조부분을 변경하기 전에 안전성을 심사 확인하여 이들에 대한 근원적인 안전성을 확보하기 위해 고용노동부는 제조업 유해 위험방지계획서 제도를 1982년부터 시행하고 있다. 그러나 주요 산업재해를 발생시키고 있는 취약업종이 제도 적용 대상에서 제외되어 근원적인 재해예방에 한계가 있다. 이러한 제도의 한계를 해결하고자 유해 위험설비의 대상업종 8개를 선정하여 이에 따른 비용편익을 분석하였다. 비용편익 분석방법은 정책 실행수단을 선택하거나 정책의 기대효과를 추정하기 위한 가장 기초적인 분석방법으로, 규제 실행의 정당성을 입증해 주는 기본 자료로서 활용하였다. 분석 결과 1차 금속 제조업의 편익이 가장 크게 나타났으며 다음으로 자동차 및 트레일러 제조업, 기타 제품 제조업, 기타 기계 및 장비제조업, 목재 및 나무제품 제조업, 고무제품 및 플라스틱 제조업, 식료품 제조업, 가구 제조업 순으로 높게 나타났다. 따라서 국가경쟁력을 강화하며 근로자의 신체와 생명을 보호하고, 재해나 사망으로 발생되는 사회적 비용을 저감시켜 국가 전체의 후생수준을 증대시키기 위해 8개 업종으로 유해 위험방지계획서의 작성을 확대할 필요가 있다.

• 한국안전학회지
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• 제26권1호
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• pp.43-48
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• 2011

Estimation of accident costs would set a sound criterion on which invest judgement for work improvement would be decided. Unfortunately, however, the professional agency and most companies in Korea still adopt the conventional cost estimation method based on Heinrich's theory would not be applicable any more since it was developed about a century ago. This research was carried out to confirm the validity of conventional accident cost estimation method. With 110 accident cases occurred in an autoglass manufacturing plant for last 7 years, post-accident treatment procedure was simplified as a model with several phases, and practical costs were analyzed case by case. The results showed that, as expected, the company should the largest portion of loss due to accidents, and that mean indirect cost were 10.10(${\pm}20.70$) times as much as direct cost estimated by conventional method. Therefore, finally, accident types and items influenced much on accidents costs were analyzed and discussed.

• The Journal of Asian Finance, Economics and Business
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• 제9권5호
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• pp.475-486
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• 2022

The purpose of this paper is to examine the use of material flow cost accounting (MFCA) in Vietnam's coal-fired thermal power plants. This study is based on the contingency and system theories to explain the application of management tools and analyze steps of input, output, and process in manufacturing. Costs in producing process-based MFCA include material cost, energy cost, system cost, and waste management cost. The exploratory case study methodology is used to describe and answer two questions, namely "How coal flow cost is recognized?" and "Why waste in material consumption can be harmful to the environment?". By analyzing the Quang Ninh and Pha Lai coal-fired thermal power plants that are the typical plants, this paper identifies the flow of primary material in these plants as a basis for determining losses for the business. The material flow of coal-fired thermal power plants provides the basis for the use of the MFCA. The manufacturing of electrical items in these plants is divided into four stages, each with its own set of losses. As a result, some phases in the application of MFCA are suggested, as well as some other elements required for MFCA application in coal-fired thermal power plants.

• 한국소성가공학회:학술대회논문집
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• 한국소성가공학회 2007년도 춘계학술대회 논문집
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• pp.139-142
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• 2007

This study focuses on the manufacturing process of a magnesium alloy impeller used for the fuel cell car using the hot forging technology. The impeller has the very complicated shape with sharply curved blade and thus generally produced by mechanical machining or casting process. However, since these technologies give the high manufacturing cost or poor mechanical properties, the forging technology is required to make the high-quality impeller with the lower manufacturing cost. In order for production of the impeller by forging technology, the parametric studies using finite element analyses were carried out to find the optimal perform shape of impeller made of magnesium alloy AZ 31 and finally die design was proposed based on the simulation results.

• 통상정보연구
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• 제11권3호
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• pp.311-335
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• 2009

This study investigates the factors barrier the performance of Korean manufacturing firms in China. Also an empirical data use the field survey of Korean manufacturing firms in China. as a result, First, we find that employment-cost factor, that is rising labor costs, a change of occupation is an effect the performance of Korean manufacturing firms in China. Second, business beginning year and by 7 region factor is very significant on the performance of Korean FDI firms in china. And then, Korean corporate investment in China is a desirable form of long-term investment shall be determined. also we know that regions of China, differentiated investment approach is effective. finally, The result shows that FDI to China is need of the long term plan, and In actual use, these FDI should be applied flexibly in china business environment.

• 품질경영학회지
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• 제8권2호
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• pp.45-58
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• 1980

The relationship between the subcontractor and the subcontractor in current industries, especially in the machine manufacturing industry, should be developed to the "Efficient Q-C-D System" in which the three elements of consideration-Quality, Cost and Delivery condition, are in a state of equillibrium. From this point of view the two parts of a subcontract must cooperate in the whole activity: ranging from the initial products planning, through the manufacturing process, to the final usage by customers. In this report, we tried to present Korean machine manufacturing industry with the model of management system of subcontracts in order that machine manufacturers may assure the quality, reduce the production cost and enhance the productivity with the model.

• 한국정보시스템학회:학술대회논문집
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• 한국정보시스템학회 2000년도 추계학술대회
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• pp.1.4-4
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• 2000

We present an autonomous distributed manufacturing system to plan the manufacturing process and the schedule based on a customer order, which considers the system efficiency as well as to the flexibly. In our system, an intermediate conceptual agent called process agent is introduced, of which the role is to create a plausible alternative for the working group to fulfill the given order. The process related decision such as process sequence, allocated facilities, schedule and cost is also made simultaneously. Given an order, several these process agents are created, and the optimum on is selected through a bidding mechanism. As a criterion of such a decision-making, we consider a concept of value which is determined by several factors such as cost, delivery, working ratio and so forth. Every agent consisting of the system makes decisions and actions so as to maximize its possessing value, and the overall behavior of the system is controlled by the value distribution.

• 한국정밀공학회지
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• 제21권7호
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• pp.30-36
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• 2004

Recently, the lead-time of a product is to be shortened in order to satisfy consumer's demand. It is thus important to reduce the manufacturing time and the cost of 3D-shaped microstructures. Micro-Electro-Mechanical Systems (MEMS) and devices are usually fabricated by lithography-based methods. Above method is not flexible for the rapid manufacture of 3D-shaped microstructures because it depends on work's experiences and requires excessive cost and time for making many masks. In this paper, the effective laser micrornachining is developed to fabricate UV sensitive polymer microstructures using laser ablation. The proposed process, named by laser microRP, is a very useful method on rapid manufacturing for 3D-shaped microstructures.