• 제목/요약/키워드: printed circuit board assembly system

검색결과 19건 처리시간 0.021초

동적계획법에 의한 멀티헤드 겐트리형 칩마운터의 피더배치 최적화 (A Dynamic Programming Approach to Feeder Arrangement Optimization for Multihead-Gantry Chip Mounter)

  • 박태형
    • 제어로봇시스템학회논문지
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    • 제8권6호
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    • pp.514-523
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    • 2002
  • Feeder arrangement is an important element of process planning for printed circuit board assembly systems. This paper newly proposes a feeder arrangement method for multihead-gantry chip mounters. The multihead-gantry chip mounters are very popular in printed circuit board assembly system, but the research has been mainly focused on single-head-gantry chip mounters. We present an integer programming formulation for optimization problem of multihead-gantry chip mounters, and propose a heuristic method to solve the large NP-complete problem in reasonable time. Dynamic programming method is then applied to feeder arrangement optimization to reduce the overall assembly time. Comparative simulation results are finally presented to verify the usefulness of the proposed method.

인쇄회로기판 조립용 디스펜서의 경로계획 알고리즘 (A Path Planning Algorithm for Dispenser Machines in Printed Circuit Board Assembly System)

  • 송종석;박태형
    • 제어로봇시스템학회논문지
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    • 제6권6호
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    • pp.506-513
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    • 2000
  • This paper proposes a path planning algorithm for dispensers to increase the productivity in printed circuit board assembly lines. We analyze the assembly sequence of the dispenser, and formulate it as an integer programming problem. The mathematical formulation can accomodate multiple heads and different types of heads through extended cost matrix. The TSP algorithms are then applied to the formulated problem to find the near-optimal solution. Simulation results are presented to verify the usefulness of the proposed scheme.

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영상 클러스터링에 의한 인쇄회로기판의 부품검사영역 자동추출 (Automatic Extraction of Component Inspection Regions from Printed Circuit Board by Image Clustering)

  • 김준오;박태형
    • 전기학회논문지
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    • 제61권3호
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    • pp.472-478
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    • 2012
  • The inspection machine in PCB (printed circuit board) assembly line checks assembly errors by inspecting the images inside of the component inspection region. The component inspection region consists of region of component package and region of soldering. It is necessary to extract the regions automatically for auto-teaching system of the inspection machine. We propose an image segmentation method to extract the component inspection regions automatically from images of PCB. The acquired image is transformed to HSI color model, and then segmented by several regions by clustering method. We develop a modified K-means algorithm to increase the accuracy of extraction. The heuristics generating the initial clusters and merging the final clusters are newly proposed. The vertical and horizontal projection is also developed to distinguish the region of component package and region of soldering. The experimental results are presented to verify the usefulness of the proposed method.

PCB 조립 공정의 작업 투입 순서 및 부품함 배치 문제에 관한 연구 (A Study on Job Sequence and Feeder Allocation Problem in PCB Assembly Line)

  • 유성열;이강배
    • 산업경영시스템학회지
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    • 제29권1호
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    • pp.63-71
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    • 2006
  • In this paper, we consider a planning problem arising from printed circuit board manufacturing industries. Given a set of several types of PCBs, component feeders and surface mounting machines in series in a PCB assembly line, the problem is to define the feeder allocation and job sequence with the objective of minimizing the total operation time of the line. We formulate the problem as a mathematical model. And, the problem is proven to be NP-hard, so a genetic algorithm is developed. Finally, we give test results to evaluate the performance of the genetic algorithm.

3대의 갠트리 기계로 구성된 PCB조립라인의 최적운영 방안 연구 (Development of an Efficient Operation Method for PCB Assembly Line with 3 Gantry-Type Machines)

  • 문기주;전문길
    • 산업경영시스템학회지
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    • 제33권4호
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    • pp.138-144
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    • 2010
  • This research deals with multiple Gantry-type assembly machines for the optimization of PCB assembly line. The automated assembly machine has 6 nozzles which can linearly move the X axis and the Y axis different from the turret type assembly machine. Each machine is optimized while considering the whole line balancing of three machines in assembly process simultaneously. Simulation models are developed using AutoMod for comparison study with single machine operation cases under various conditions such as types and total number of components to evaluate the proposed method.

PCB 조립검사기의 자동티칭을 위한 부품윈도우 자동추출 방법 (Automatic Extraction of Component Window for Auto-Teaching of PCB Assembly Inspection Machines)

  • 김준오;박태형
    • 제어로봇시스템학회논문지
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    • 제16권11호
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    • pp.1089-1095
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    • 2010
  • We propose an image segmentation method for auto-teaching system of PCB (Printed Circuit Board) assembly inspection machines. The inspection machine acquires images of all components in PCB, and then compares each image with its standard image to find the assembly errors such as misalignment, inverse polarity, and tombstone. The component window that is the area of component to be acquired by camera, is one of the teaching data for operating the inspection machines. To reduce the teaching time of the machine, we newly develop the image processing method to extract the component window automatically from the image of PCB. The proposed method segments the component window by excluding the soldering parts as well as board background. We binarize the input image by use of HSI color model because it is difficult to discriminate the RGB colors between components and backgrounds. The linear combination of the binarized images then enhances the component window from the background. By use of the horizontal and vertical projection of histogram, we finally obtain the component widow. The experimental results are presented to verify the usefulness of the proposed method.

PCB 생산에서 생산성 향상을 위한 최적화 문제들 (Optimization Problems for improving Productivity in Printed Circuit Board Manufacturing)

  • 임석철;김내헌;김형석
    • 산업경영시스템학회지
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    • 제16권28호
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    • pp.1-8
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    • 1993
  • Electrical or electronic products have been becoming smaller and high integrated recently, with printed circuit boards(PCB's) being the key components for these products. The introduction of new technology of surface mounted devices(SMD) opens new ways towards high integration on the PCB. Many plants in eletronical industry which produce high variety of PCB's to meet the demands of customer orders require flexibility in PCB's production lines. This survey paper describes the related optimization problems and solution methods to the automated surface mount technology(SMT) assembly lines, and provides with the research direction for improving flexibility.

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TPU 소재를 이용한 3D 프린팅 로봇 손의 제어기 설계에 관한 연구 (A Study on the Controller Design of 3D Printed Robot Hand using TPU Material)

  • 최영림;박예은;김종욱;이선희
    • 한국의류학회지
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    • 제48권2호
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    • pp.312-327
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    • 2024
  • In this study, a rehabilitation 3D printed wearable device was developed by combining an assembly-type robot hand and an integral-type robot hand through fused deposition 3D printing manufacturing with various hardness TPU (Thermoplastic Polyurethane) filaments. The hardware configuration of the robot hand includes a controller designed with four motors, one small servo motor, and a circuit board. In the case of the assembly-type robot hand model, a 3D printed robot hand was assembled using samples printed with TPU of hardness 87A and 95A. It was observed that TPU with a hardness of 95A was suitable for use due to shape stability. For the integrated-type robot hand model, the external sample using TPU of hardness 95A could be modified through a cutting method, and the hardware configuration is the same as the assembly-type. The system structure of the 3D printed robot hand was improved from an individual control method to a simultaneous transmission method.Furthermore, the system architecture of an integrated 3D printed robotic hand rehabilitation device and the application of the rehabilitation device were developed.

B-spline 표면 근사화 기반의 3차원 솔더 페이스트 검사 (3-D Solder Paste Inspection Based on B-spline Surface Approximation)

  • 이준재;이병국;류재칠
    • Journal of the Korean Society for Industrial and Applied Mathematics
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    • 제10권1호
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    • pp.31-45
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    • 2006
  • 최근 고집적화, 고밀도화 되어가는 첨단 디바이스와 섬세한 공정들은 SMT(surface mounting technology)에서의 더욱 까다로운 검사 항목들을 요구하고 있다. 특히, 어셈블리 생산품의 불량의 60% 이상을 차지하는 솔더 프린팅의 검사는 이러한 추세에 대응책으로 3차원적인 검사방식이 기존의 2차원적인 검사방식을 빠르게 대치해나가고 있다. 따라서 본 논문에서는 SMT 어셈블리 라인에서 PCB(Printed circuit board)에 프린팅된 솔더 페이스트에 대한 3차원적인 검사를 자동으로 수행하는 인라인형의 고속 3차원 검사 장비 및 측정 알고리즘을 제안한다. 제안한 방법은 3차원 데이터를 B-스플라인으로 표면을 구성한 다음 이를 기반으로 패드를 추출하고, 검사하는 알고리즘이다.

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An Integrated ECAD Library System for Standard Part Management in a Heterogeneous ECAD Environment

  • Yoo, Byung-Hoon;Lee, Hwa-Jong;Rho, Ho-Chang
    • 산업공학
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    • 제7권1호
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    • pp.67-74
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    • 1994
  • In this study, we propose an integrated CAD(Computer Aided Design) library database in a heterogeneous commercial ECAD(Electronic CAD) environment. To effectively solve engineering problems focused on BOM data extraction we use a software system called schematic capture and company-wide standard electronic part information loaded on different commercial ECADs. We unify many commercial ECADs into one schematic capture and a variety of PCB(Printed Circuit Board) design tools. For this purpose we develope a model for linking CAD symbol library with company-wide standard part information. We also develope a schematic design data conversion scheme and show how to extract PBA level BOM data using our customized schematic capture. This system is being operated in an X-Window based engineering work station and commercial RDBMS base.

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