• 한국산학기술학회논문지
• /
• 제12권9호
• /
• pp.4138-4146
• /
• 2011

표면실장기술(SMT: Surface Mount Technology)에 있어서 휴대폰 및 평판 디스플레이가 점점 가볍고 얇아지면서 이 제품에 사용되는 전자부품이 작아지고 있어, 0402, 0603 Chip등과 같은 SMD(Surface Mount Device) 부품을 실장하는 기술이 대두되고 있다. 따라서 Chip Mounter 제조회사들은 미삽이나 오삽을 방지하기 위한 실장기술에 대해 지속적인 연구를 해오고 있다. 본 연구는 이러한 미삽 오삽 방지를 실현하기 위하여 Fiber sensor를 이용하여 기계적 구조를 마련하고, 이를 활용한 시스템 알고리즘을 개선하는 기술을 제시한다.

• Design & Manufacturing
• /
• 제11권2호
• /
• pp.25-28
• /
• 2017

Semiconductor equipment manufacturers desire to enhance efficiency of Sub Fab to increase semiconductor productivity. For this reason, Sub Fab equipment manufacturers are developing Integrated System that combined modules with multiple facilities. Integrated System is required to apply Mount Leveler of Wedge Type in compliance with weight increase compared with existing single equipment and product shape change. This thesis analyzes main design variables of components of Wedge Mount Leveler and carries out structure analysis using ANSYS, finite element analysis program Analysis shows that main design variables of components of Wedge Mount Leveler has self-locking condition by friction force of Wedge and adjusting bolt. Each friction force hinges upon Wedge angle and Friction Coefficient of contact surface and upon the thread angle and Friction Coefficient of contact surface. Also, as a result of carrying out structure analysis of Wedge Mount Leveler, deflection and stress appears in different depending on the height of the level.

• International Journal of Naval Architecture and Ocean Engineering
• /
• 제5권1호
• /
• pp.62-80
• /
• 2013

This paper has been focused on developing a new hybrid mount for shipboard equipment used in naval surface ships and submarines. While the hybrid mount studied in our previous research was 100 kg-class series-type mount, the new hybrid mount has been designed as an inertia-type mount capable of supporting a static of 500 kg. The proposed mount consists of a commercial rubber resilient mount, a piezostack actuator and an inertial mass. The piezostack actuator connected with the inertial mass generates actively the control force. The performances of the proposed mount with a newly designed specific controller have been evaluated in accordance with US military specifications and compared with the passive mount. An isolation system consisting of four proposed mounts and auxiliary devices has been also tested. Through a series of experimental tests, it has been confirmed that the proposed mount provides better performance than the US Navy's standard passive mounts.

• 한국정보통신학회:학술대회논문집
• /
• 한국정보통신학회 2016년도 춘계학술대회
• /
• pp.674-675
• /
• 2016

본 논문에서는 전기 및 전자 쓰레기의 대책으로 Printed Circuit Board (PCB) 부착형 Radio-Frequency Identification (RFID) 태그 칩을 이용한 사물인터넷 디바이스 생산 공정에 대한 모델을 제안한다. 전기 및 전자제품은 PCB 부품실장 공정과 검사가 필요하다. 또한 현재 제조사들이 사용하는 바코드 시스템은 Surface Mount Technology (SMT)공정이 완료되기 전까지 PCB 이력 관리가 불가능하다. 논문에서 제안한 PCB 부착형 RFID 태그 칩을 이용한 사물인터넷 디바이스 생산 공정 모델은 바코드 방식과 같은 출력-부착 단계가 필요하지 않다. 태그 칩은 각 단계의 공정 데이터가 기록될 수 있고, 데이터베이스 시스템 (DBMS) 접속 횟수를 현격히 줄일 수 있다.

• 한국군사과학기술학회지
• /
• 제26권3호
• /
• pp.205-213
• /
• 2023

An optimal design of a simple beam-shaped flexure hinge mount supporting an optical mirror is presented. An optical mirror assembly is an opto-mechanically coupled system as the optical and mechanical behaviors interact. This side-supporting mount is flexible in the radial direction and rigid for the remaining degrees of freedom to support the mirror without transferring thermal load. Through thermo-elastic, optical and eigenvalue analysis, opto-mechanical performance was predicted to establish the objective functions for optimization. The key design parameters for this flexure are the thickness and length. To find the optimal values of design parameters, response surface analysis was performed using the design of experiment based on nested FCD. Optimal design candidates were derived from the response surface analysis, and the optimal design shape was confirmed through Opto-mechanical performance validation analysis.

• Industrial Engineering and Management Systems
• /
• 제12권4호
• /
• pp.330-335
• /
• 2013

A surface mount device (SMD) assembles electronic components on printed circuit boards (PCB). Since a component assembly process is a bottleneck process in a PCB assembly line, making an efficient SMD plan is critical in increasing the PCB assembly line productivity. Feeder assignment is an important part of the SMD plan optimization. In this paper, we propose a feeder re-assign improvement algorithm for a specific type of SMD machine with a piano type multi-head gantry. Computational results on some real-world benchmark data sets show the effectiveness of our proposed algorithm.

• 제어로봇시스템학회:학술대회논문집
• /
• 제어로봇시스템학회 1995년도 Proceedings of the Korea Automation Control Conference, 10th (KACC); Seoul, Korea; 23-25 Oct. 1995
• /
• pp.259-262
• /
• 1995

In this paper, a model of an asymptotically reliable serial production line with quailty control devices is introduced and analyzed. By an asymptotic technique and Taylor series expansion, its average production rate is approximated in a closed form. The results are applied to a case study of a surface mount system.

• 천문학회보
• /
• 제15권
• /
• pp.12.2-12.2
• /
• 1990

• 한국우주과학회:학술대회논문집(한국우주과학회보)
• /
• 한국우주과학회 1994년도 한국우주과학회보 제3권1호
• /
• pp.27-27
• /
• 1994

No Abstract. See Full-text

• 한국산학기술학회논문지
• /
• 제16권3호
• /
• pp.2146-2150
• /
• 2015

표면 실장 기술은 자동차 정션박스 등에 삽입되는 릴레이를 칩 마운터를 이용하여 실장 하는 경우와 0402, 0603과 같은 소형의 부품을 실장 하는 경우가 있다. 본 논문에서는 무거운 무게로 인해 문제가 발생하는 릴레이를 공급하기 위한 스틱 튜브의 개발과 반대로 너무 크기가 작아 발생하는 미 오삽 방지를 위한 파이버 센서를 이용한 기술을 제시하여 얼마나 생산성이 향상되었는지 실험을 통해 보여준다.