• Title/Summary/Keyword: Re-Manufacturing

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Simulation Analysis of Flexible Track Drilling Machines Based on ADAMS (ADAMS 기반의 플렉시블 트랙 드릴링 머신의 시뮬레이션 분석)

  • Zhu, Zhong-gang;Zhang, Qi;Lv, Jian-Hua;Qin, Zhen;Lyu, Sung-Ki
    • Journal of the Korean Society of Manufacturing Process Engineers
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    • v.17 no.5
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    • pp.1-7
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    • 2018
  • Flexible track drilling machines are credited with important applications in the area of aircraft manufacturing because of their portability, quick installation capabilities, and high efficiency. However, their structures are special and the constitution principles and motion characteristics are difficult to control, increasing the development costs and research cycle in the context of the technology blockade of foreign companies. The simulation analysis of flexible track drilling machines can be conducted by applying virtual prototypes, shortening the development cycle and reducing the cost. In this paper, a model of a machine is established by using the SolidWorks software and imported into ADAMS to conduct kinematic and dynamic simulation analysis. During the analysis, the feasibility of the configuration is checked, a reasonable driving motion is chosen, potential deficiencies are found, and improvement actions are raised.

Study on Design of Heavy Payload Robot Considering Design Factor of Gravity Compensator (중력보상장치 설계계수를 고려한 고가반 로봇설계에 관한 연구)

  • Lee, Do-Seung;Lee, Ho-Su;Pyo, Sang-Hun;Yoon, Jung-Won;Lyu, Sung-Ki
    • Journal of the Korean Society of Manufacturing Process Engineers
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    • v.18 no.5
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    • pp.23-28
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    • 2019
  • In recent years, medium- to large-scale transportation machinery and machine tool manufacturing process lines have shown a trend toward centralization, softening, lightening, and slimming to reduce costs and increase productivity. This has increased the demand for vertical articulated robots. When developing and introducing a heavy weight-handling robot that can be easily applied to existing production lines, it is expected to have a great effect in securing industrial competitiveness by solving industrial issues such as the decreased productivity and increased risk of accidents due to work involving heavy lifting. In this study, we design a 6-axis robot mechanism with a heavy load-handling capacity of 700kg or more for large-sized materials of various types supplied in small quantities.

Study on Simulation and Calculation Method of Thermal Error Compensation System for a Ball Screw Feed Drive (볼 스크류 이송장치 열 에러 보상 시스템의 시뮬레이션 및 계산 방법에 관한 연구)

  • Xu, Zhe Zhu;Choi, Chang;Kim, Lae-Sung;Baek, Kwon-In;Lyu, Sung-ki
    • Journal of the Korean Society of Manufacturing Process Engineers
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    • v.16 no.2
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    • pp.88-93
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    • 2017
  • Due to the requirement of the development of the precision manufacturing industry, the accuracy of machine tools has become a key issue in this field. A critical factor that affects the accuracy of machine tools is the feed system, which is generally driven by a ball screw. Basically, to improve the performance of the feed drive system, which will be thermally extended lengthwise by continuous usage, a thermal error compensation system that is highly dependent on the feedback temperature or positioning data is employed in the machine tool system. Due to the overdependence on measuring technology, the cost of the compensation system and low productivity level are inevitable problems in the machine tool industry. This paper presents a novel feed drive thermal error compensation system method that could compensate for thermal error without positioning or temperature feedback. Regarding this thermal error compensation system, the heat generation of components, principal of compensation, thermal model, mathematic model, and calculation method are discussed. As a result, the test data confirm the correctness of the developed feed drive thermal error compensation system very well.

Virtual Manufacturing for an Automotive Company(V) - Parametric Modeling of the Digital General Assembly Shop using Object-Oriented Methods (자동차 가상생산 기술 적용(V) - 객체지향 방법에 의한 디지털 조립공장의 파라메트릭 모델링)

  • Park, Tae-Keun;Kim, Gun-Yeon;Noh, Sang-Do;Park, Young-Jin
    • IE interfaces
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    • v.18 no.1
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    • pp.94-103
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    • 2005
  • Digital Manufacturing is a technology to facilitate effective product developments and agile productions by digital environments representing the physical and logical schema and the behavior of real manufacturing system including manufacturing resources, processes and products. A digital factory as a well-designed and integrated environment is essential for successful applications of this technology. In this research, we constructed a sophisticated digital factory of an automotive company’ general assembly shop by measuring and 3-D CAD modeling using parametric methods. Specific parameters of each objects were decided by object-oriented schema of the general assembly shop. It is expected that this method is very useful for constructions of a digital factory, and helps to manage diverse information and re-use 3D models.

Development of Simulation System Curved Surface Rendering using a Ball-end Milling (볼 엔드밀을 사용한 곡면가공 시뮬레이션 시스템 개발)

  • 박홍석;박준학;이재종
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 1997.10a
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    • pp.125-128
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    • 1997
  • They use a Ball End-mill in order to manufacturing sculptured surface when making metal mold, mold, cars and aircraft. In the work of a Ball End-mill case, customers do not often satisfied with manufacturing precision. Eventually, they have to re-work for the purpose of meeting manufacturing precision. There are resulted in lots of loss, whereby, in terms of both time and costs. The reasons of tolerance reducing manufacturing precision are thermal strain, the surface is damaged because of increasing cutting force and tool wear, tool deflection etc.. We focus on, however, manufacturing precision caused due to deflection of tool.

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Review of Social Manufacturing Technology on Product Life Cycle Management(PLM) Base (제품수명주기관리(PLM) 기반의 소셜매뉴팩처링 기술 고찰)

  • Park, Jong-Man;Kim, Bong-Sun
    • Journal of Korean Institute of Industrial Engineers
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    • v.39 no.3
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    • pp.156-162
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    • 2013
  • Social manufacturing architecture is based on information delivery through social media and SNS, PLM and social platform, crowd source and knowledge base on whole phase of product life cycle. Although advanced social manufacturing issues are rising globally, its technology emerging into domestic industry is likely to be slow. We focused to review technological changes and R&D trend, patent issues, and then suggest assignments and advices to be practiced for social manufacturing modeling.

A Study on Deterministic Utilization of Facilities for Allocation in the Semiconductor Manufacturing (반도체 설비의 효율성 제고를 위한 설비 할당 스케줄링 규칙에 관한 연구)

  • Kim, Jeong Woo
    • Journal of Korean Society of Industrial and Systems Engineering
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    • v.39 no.1
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    • pp.153-161
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    • 2016
  • Semiconductor manufacturing has suffered from the complex process behavior of the technology oriented control in the production line. While the technological processes are in charge of the quality and the yield of the product, the operational management is also critical for the productivity of the manufacturing line. The fabrication line in the semiconductor manufacturing is considered as the most complex part because of various kinds of the equipment, re-entrant process routing and various product devices. The efficiency and the productivity of the fabrication line may give a significant impact on the subsequent processes such as the probe line, the assembly line and final test line. In the management of the re-entrant process such as semiconductor fabrication, it is important to keep balanced fabrication line. The Performance measures in the fabrication line are throughput, cycle time, inventory, shortage, etc. In the fabrication, throughput and cycle time are the conflicting performance measures. It is very difficult to achieve two conflicting goal simultaneously in the manufacturing line. The capacity of equipment is important factor in the production planning and scheduling. The production planning consideration of capacity can make the scheduling more realistic. In this paper, an input and scheduling rule are to achieve the balanced operation in semiconductor fabrication line through equipment capacity and workload are proposed and evaluated. New backward projection and scheduling rule consideration of facility capacity are suggested. Scheduling wafers on the appropriate facilities are controlled by available capacity, which are determined by the workload in terms of the meet the production target.

Development of Free-Form Surface Modeling System Using the Reverse engineering Technology (역설계를 이용한 자유곡면 모델링 시스템 개발)

  • 명태식
    • Journal of the Korean Society of Manufacturing Technology Engineers
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    • v.9 no.3
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    • pp.111-122
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    • 2000
  • It is difficult to make shape library for featrue-based modeling because free-form surface is various shaped complicated To make modeling using similar shape feature-based model is easy and fast. Recently RE(Reverse Engineering) technolo-gy is very convenient method to get free-form surface. This study develops surface editor which makes surface modeling to manipulate control points and this study We study on the effective model data management using database system.

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A Study on Remanufacturing Industry for automobile parts (자동차 부품의 재제조산업 활성화방안에 관한 연구)

  • Song, Byeong-Suk;Cho, Jai-Rip
    • Proceedings of the Korean Society for Quality Management Conference
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    • 2009.10a
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    • pp.230-233
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    • 2009
  • Remanufacturing is an industrial manufacturing process. The merits of manufacturing are to reuse old products to perform like a new product and to save energy, natural resources, landfill space and to reduce air pollution by less re-smelting. This paper proposes a systemic approach for activating the domestic remanufacturing industry. The approach is based on inside and outside regulations to apply remanufacturing companies. And, we analyzed the state and problems of remanufacturing industry for automobile parts.

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Study of the Transmission Error Prediction of a Five-speed Manual Transmission System (5속 수동 트랜스미션의 전달오차 예측에 관한 연구)

  • Cho, Sang-Pil;Lee, Dong-Gyu;Kim, Lae-Sung;Xu, Zhe-zhu;Lyu, Sung-ki
    • Journal of the Korean Society of Manufacturing Process Engineers
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    • v.15 no.2
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    • pp.66-71
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    • 2016
  • For the manual transmission gearbox used in the automotive industry, gear meshing transmission error is the main source of noise known as gear whine, and radiated gear whine noise plays an important role in the whole gearbox. Therefore, in order to keep competitive in the automotive market, the NVH performance of transmission gearboxes is increasingly important for automotive manufacturers when a new product is developed. In this paper, in order to achieve an optimized tooth contact pattern, gear tooth modification is applied to make up for the deformation of the teeth owing to load. A five-speed MT gearbox is firstly modeled in RomaxDesign software and the prediction of transmission error under the loaded torques is studied and compared. From the simulation, the transmission error and maximum contact stress are also simulated and compared after tooth modification of the loaded torques. Finally, the simulation results are used to optimize the whole gearbox design and the final gearbox prototype is testified to obtain NVH performance in a semi-anechoic room.