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Volume 34(1); January 2017

Articles
Mobile Software Platform for Root Industry
Sang Uk Lee, Man Hui Yi
J. Korean Soc. Precis. Eng. 2017;34(1):13-17.
Published online January 1, 2017
DOI: https://doi.org/10.7736/KSPE.2017.34.1.13
The sectors of the Root industry include casting, plastic works, welding, surface treatment, and heat treatment. While the industry is concerned with the processing technologies that are used in most of the manufacturing industries, the sophistication of the corresponding manufacturing information systems is very low. This paper describes a manufacturing information system for the building sector for which the smartphone devices that the workers use in their daily lives are employed, and where the cost of the adaption of the manufacturing system at their factories is minimized. The proposed system consists of the following three parts: UI composer, General Application, and Gateway.
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Equipment Maintenance Environment Based on Field-Data of Root Industry by Manufacturing-Field Analysis
Dong-Hong Kim, Jun-Yeob Song
J. Korean Soc. Precis. Eng. 2017;34(1):19-22.
Published online January 1, 2017
DOI: https://doi.org/10.7736/KSPE.2017.34.1.19
This paper describes the efficient equipment maintenance that can offer the exact time for repair and change of component in root industry. A conventional method offered the fixed time for repair and change of component because the method is based on early guarantee specification of the component. However the operating condition of manufacturing field is often under worse condition than early guarantee condition for high productivity. So, most components can’t use until early guarantee time due to the operation of various different condition. Therefore we suggest the useful method for efficient equipment-maintenance by manufacturing-field analysis and feedback database. For this, the classification of root industry and related equipment is performed and then the detail classification of the process and component for equipment maintenance. And the monitoring module is also designed to gather data for feedback process and the environment is basically implemented for aging and reliability test.
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Development of Prediction Model for Root Industry Production Process Using Artificial Neural Network
Chanbeom Bak, Hungsun Son
J. Korean Soc. Precis. Eng. 2017;34(1):23-27.
Published online January 1, 2017
DOI: https://doi.org/10.7736/KSPE.2017.34.1.23
This paper aims to develop a prediction model for the product quality of a casting process. Prediction of the product quality utilizes an artificial neural network (ANN) in order to renovate the manufacturing technology of the root industry. Various aspects of the research on the prediction algorithm for the casting process using an ANN have been investigated. First, the key process parameters have been selected by means of a statistics analysis of the process data. Then, the optimal number of the layers and neurons in the ANN structure is established. Next, feed - forward back propagation and the Levenberg - Marquardt algorithm are selected to be used for training. Simulation of the predicted product quality shows that the prediction is accurate. Finally, the proposed method shows that use of the ANN can be an effective tool for predicting the results of the casting process.

Citations

Citations to this article as recorded by  Crossref logo
  • A Study on 3D Printing Conditions Prediction Model of Bone Plates Using Machine Learning
    Song Yeon Lee, Yong Jeong Huh
    Journal of the Korean Society for Precision Engineering.2022; 39(4): 291.     CrossRef
  • Quality prediction for aluminum diecasting process based on shallow neural network and data feature selection technique
    Chanbeom Bak, Abhishek Ghosh Roy, Hungsun Son
    CIRP Journal of Manufacturing Science and Technology.2021; 33: 327.     CrossRef
  • Response Simulation, Data Cleansing and Restoration of Dynamic and Static Measurements Based on Deep Learning Algorithms
    Seok-Jae Heo, Zhang Chunwei, Eunjong Yu
    International Journal of Concrete Structures and Materials.2018;[Epub]     CrossRef
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Analysis of Field Conditions and Requirements for Deploying Smart Factory
Hyunjeong Lee, Yong Jin Kim, Jeongil Yim, Yong-Woon Kim, Soo-Hyung Lee
J. Korean Soc. Precis. Eng. 2017;34(1):29-34.
Published online January 1, 2017
DOI: https://doi.org/10.7736/KSPE.2017.34.1.29
The operating environments of factories and manufacturing units have changed dramatically due to globalization, population, and customization. The existing factories are converted into smart units using information and communications technology (ICT). These smart factories can produce, control, repair, and manage themselves. The manufacturing processes are efficiently optimized using the monitoring and analysis methods of ICT. In this experimental study, we carried out a survey on the system solution providers and consumer companies to determine the field conditions and requirements necessary for assembling a smart factory. Using the results of this survey, we effectively devised smart factory solutions and implemented them on the existing conditions in various factories.

Citations

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  • Development of a Find-On System for Material Warehouse Management Suitable for Use in Small and Medium-Sized Businesses
    kim songmin, jung seng-hwa, jae jin Song
    The Journal of Korean Institute of Information Technology.2025; 23(5): 63.     CrossRef
  • A Study on the Level Diagnosis Model of Korean Smart Factory for Small-Medium Manufacturing Company : Focusing on the Firm of Plastic Injection parts
    Man-Seok Lee
    The Journal of Korean Institute of Information Technology.2024; 22(2): 165.     CrossRef
  • Improvement of Manufacturing Industry Work Environment Using Signage: Root Industry
    Kyungjin Oh, Nayoung Lee, Daekwon Chung, Jinho Woo, Haeyeon Shin, Hunseop Kim, Ho Seong Lee, San Kim, SangJun Moon, Won-Shik Chu
    Academic Society for Appropriate Technology.2022; 8(3): 117.     CrossRef
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3D Cutting Machine of EPS Foam for Manufacturing Free-Formed Concrete Mold
Junghwan Seo, Daehie Hong
J. Korean Soc. Precis. Eng. 2017;34(1):35-39.
Published online January 1, 2017
DOI: https://doi.org/10.7736/KSPE.2017.34.1.35
We used a construction method using a CNC milling machine, where free-formed molds were made by cutting EPS (Expanded PolyStyrene) foam with the CNC machine, to build free-formed buildings. CNC milling is off-the-shelf technology that can easily cut EPS foam; however its production cost is too high and the time to manufacture an EPS mold is too long. This paper proposes a novel cutting machine with a fast and cost effective mechanism to manufacture EPS concrete molds. Our machine comprises a cutter and Cartesian coordinate type moving mechanism, where the cutter cuts EPS foam using a hotwire in the shape of ‘Π’ and is capable of adjusting its cutting angle in real-time while keeping its cutting width. We proved through cutting experiments on the CNC machine that cutting time was greatly shortened compared to the conventional method and that the resulting concrete mold satisfied manufacturing precision.

Citations

Citations to this article as recorded by  Crossref logo
  • Development of Side Mold Control Equipment for Producing Free-Form Concrete Panels
    Jiyeong Yun, Kyeongtae Jeong, Jongyoung Youn, Donghoon Lee
    Buildings.2021; 11(4): 175.     CrossRef
  • Manufacturing Automation System of Freeform Concrete Formwork Using S-LOM Method
    Joonhyeok Sim, Hakmin Kim, Kyunwoo Park, Chanwoo Kim, Daehie Hong
    Journal of the Korean Society for Precision Engineering.2020; 37(1): 43.     CrossRef
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Modeling and Validation of 3DOF Dynamics of Maglev Vehicle Considering Guideway
Hyeon-cheol Park, Myounggyu Noh, Heung-Sik Kang, Hyung-Suk Han, Chang-Hyun Kim, Young-Woo Park
J. Korean Soc. Precis. Eng. 2017;34(1):41-46.
Published online January 1, 2017
DOI: https://doi.org/10.7736/KSPE.2017.34.1.41
Magnetically levitated (Maglev) vehicles maintain a constant air gap between guideway and car bogie, and thereby achieves non-contact riding. Since the straightness and the flatness of the guideway directly affect the stability of levitation as well as the ride comfort, it is necessary to monitor the status of the guideway and to alert the train operators to any abnormal conditions. In order to develop a signal processing algorithm that extracts guideway irregularities from sensor data, virtual testing using a simulation model would be convenient for analyzing the exact effects of any input as long as the model describes the actual system accurately. Simulation model can also be used as an estimation model. In this paper, we develop a state-space dynamic model of a maglev vehicle system, running on the guideway that contains jumps. This model contains not only the dynamics of the vehicle, but also the descriptions of the power amplifier, the anti-aliasing filter and the sampling delay. A test rig is built for the validation of the model. The test rig consists of a small-scale maglev vehicle, tracks with artificial jumps, and various sensors measuring displacements, accelerations, and coil currents. The experimental data matches well with those from the simulation model, indicating the validity of the model.

Citations

Citations to this article as recorded by  Crossref logo
  • Stochastic Dynamics of Suspension System in Maglev Train: Governing Equations for Response Statistics and Reliability
    Wantao Jia, Mingxia Luo, Fei Ni
    International Journal of Structural Stability and Dynamics.2023;[Epub]     CrossRef
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Design and Performance Test of a Rotary Actuator for Side Tilting Excavator Bucket
Min Su Park, Jun Seok Lee, Do Youp Kim, Eung Suk Lee
J. Korean Soc. Precis. Eng. 2017;34(1):47-51.
Published online January 1, 2017
DOI: https://doi.org/10.7736/KSPE.2017.34.1.47
Generally, a working excavator has only one directional bucket tilting angle, which is up-forward. However, side direction rotation of the bucket would allow variety of working output. We designed a hydraulic rotary actuator comprising a double rod hydraulic cylinder with a rack-pinion gear set for use in excavator bucket with side tilting mechanism, thus converting the linear to angular motion. The proposed side tilting rotary actuator was designed with parts suitable for medium size of heavy duty excavator. These mechanical parts were inexpensive to purchase and the manufacturing cost was reasonable. The proposed mechanism is potentially useful for excavator with variety of working output.

Citations

Citations to this article as recorded by  Crossref logo
  • A Gain-Adaptive Intelligent Nonlinear Control for an Electrohydraulic Rotary Actuator
    Nguyen Minh Tri, Dang Xuan Ba, Kyoung Kwan Ahn
    International Journal of Precision Engineering and Manufacturing.2018; 19(5): 665.     CrossRef
  • A Review of Recent Advances in Design Optimization of Gearbox
    Zhen Qin, Yu-Ting Wu, Sung-Ki Lyu
    International Journal of Precision Engineering and Manufacturing.2018; 19(11): 1753.     CrossRef
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Development and Performance Evaluation of Fine Stage for 3-DOF Error Compensation of a Linear Axis
Jae Chang Lee, Min Jae Lee, Seung Han Yang
J. Korean Soc. Precis. Eng. 2017;34(1):53-58.
Published online January 1, 2017
DOI: https://doi.org/10.7736/KSPE.2017.34.1.53
A fine stage is developed for the 3-DOF error compensation of a linear axis in order to improve the positioning accuracy. This stage is designed as a planar parallel mechanism, and the joints are based on a flexure hinge to achieve ultra-precise positioning. Also, the effect of Abbe’s offsets between the measuring and driving coordinate systems is minimized to ensure an exact error compensation. The mode shapes of the designed stage are analyzed to verify the desired 3-DOF motions, and the workspace and displacement of a piezoelectric actuator (PZT) for compensation are analyzed using forward and inverse kinematics. The 3-DOF error of a linear axis is measured and compensated by using the developed fine stage. A marked improvement is observed compared to the results obtained without error compensation. The peak-to-valley (PV) values of the positional and rotational errors are reduced by 92.6% and 91.3%, respectively.

Citations

Citations to this article as recorded by  Crossref logo
  • A new method to identify the position-independent geometric errors in the rotary axes of five-axis machine tools
    Seth Osei, Wei Wang, Qicheng Ding
    Journal of Manufacturing Processes.2023; 87: 46.     CrossRef
  • Development and Performance Evaluation of a Fine Stage for Compensating 6-DOF Motion Errors of an Ultra-Precision Linear Stage
    Hoon-Hee Lee, In-Seok Lee, Kwang-Il Lee, Seung-Han Yang
    Journal of the Korean Society for Precision Engineering.2021; 38(2): 123.     CrossRef
  • Optimal On-Machine Measurement of Position-Independent Geometric Errors for Rotary Axes in Five-Axis Machines with a Universal Head
    Kwang-Il Lee, Jae-Chang Lee, Seung-Han Yang
    International Journal of Precision Engineering and Manufacturing.2018; 19(4): 545.     CrossRef
  • Error Compensation Using Variable Stiffness in Orbital Grinding
    Joon Jang, Woo Chun Choi
    International Journal of Precision Engineering and Manufacturing.2018; 19(3): 317.     CrossRef
  • Face- and Body-Diagonal Length Tests using a Double Ball-Bar for Squareness Errors of Machine Tools
    Seung-Han Yang, Hoon-Hee Lee, Kwang-Il Lee
    International Journal of Precision Engineering and Manufacturing.2018; 19(7): 1039.     CrossRef
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Development of Multi Sample Array System Based on Pneumatic Valve
Chul Min Kim, Seo Jung Park, Gyu Man Kim
J. Korean Soc. Precis. Eng. 2017;34(1):59-63.
Published online January 1, 2017
DOI: https://doi.org/10.7736/KSPE.2017.34.1.59
We present a multi-sample array device based on a pneumatic system. Solenoid valves were used to control a micro valve in a pneumatic system. The use of a compressor together with a vacuum pump ensured that one outlet could supply both compression and vacuum pressure. The multi-sample array device was fabricated using conventional photolithography and PDMS casting. The device was composed of a multiplexer, sample array, and rinsing. The multiplexer could control four sample solutions injecting into the sample array chamber. Sample solution not arrayed was removed by DI-water from the rinsing inlet. To prevent trapping of microbubbles in the channel during injection of sample solution into the device, surfactant was added in PDMS solution to serve as a hydrophilic surface treatment. As a result, the device could be used as a sample array for 64 cases, using four samples and three columns of three chambers.

Citations

Citations to this article as recorded by  Crossref logo
  • Shape Optimization of Pneumatic Angle Valve Using Structural Analysis
    In-Soo Son
    Journal of Power System Engineering.2020; 24(5): 48.     CrossRef
  • Non-Contact Intraocular Pressure Measurement Method using Relation between Deformed Cornea and Reflected Pneumatic Pressure
    Hyung Jin Kim, Young Ho Seo, Byeong Hee Kim
    International Journal of Precision Engineering and Manufacturing.2018; 19(5): 737.     CrossRef
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Preliminary Study on the Effects of Out-of-Plane Deposition Angle on Product Characteristics of a UV Photo-Curing Process
Yong-Hun Jang, Dong-Gyu Ahn, Jae-Guk Song, Dong-In Kim, Bo-Sung Shin
J. Korean Soc. Precis. Eng. 2017;34(1):65-72.
Published online January 1, 2017
DOI: https://doi.org/10.7736/KSPE.2017.34.1.65
The goal of this paper is to investigate the effects of out-of-plane deposition angle on product characteristics of a UV photo-curing process. Specimens are manufactured from a commercialized UV photo-curing machine, the NOBEL V1.0. The influence of the out-of-plane deposition angle of the specimen on surface characteristics, including morphology of the sloped surface, pick-to-pick distance of convex region, and roughness of the sloped surface, is examined via the observation of the sloped surface. In addition, the influence of the radius of curvature of the specimen on the surface roughness of the sloped surface is evaluated. The effects of the out-of-plane deposition angle on impact strength of specimens are investigated via Izod impact experiments. Finally, we discuss the influence of the out-of-plane deposition angle on failure characteristics of specimens for impact loads.
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한국정밀공학회지 Vol.34 No.1 목차
J. Korean Soc. Precis. Eng. 2017;34(1):75-76.
Published online January 1, 2017
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