• Title/Summary/Keyword: Finishing Delivery Temperature

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A Study on the Improvement of Prediction Accuracy for Rolling Force in Continuous Cold Rolling Mill (연속냉각압연에서의 압연하중 예측정도 향상에 대한 연구)

  • Song, Gil-Ho;Park, Hae-Doo;Kim, Shin-Il
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.20 no.7
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    • pp.2257-2265
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    • 1996
  • In the cold rolling mill, it is very important that a constrained static flow stress of rolled strip and rolling force calculation model be exactly considered to improve an prediction accuracy for rolling forces. Therefore, in this study, the values of the constrained static flow stress are used by deriving the regression equation which is a function of rolling conditions(FDT, CT) and chemical compositions(C, Si, Mn), previously applied by making the tables of yield strength for hot coils with size. And with the consideration that an elastic deformation part of an rolled strip appears at the entry and delivery side of the contacting area between the work roll and rolled strip is calculated. By applying these methods, the more accurate prediction for rolling force is obtained. As a results, the deviation of thickness is significantly reduced in the rolling direction.

Preparatory Research prior to the Development of Consumer-Tailored 3D Printing Service Platform (소비자 맞춤형 삼차원 프린팅 서비스 플랫폼 개발을 위한 탐색)

  • Lee, Guk-Hee;Choi, Hye-Kyong
    • Science of Emotion and Sensibility
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    • v.20 no.1
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    • pp.3-16
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    • 2017
  • With the development and proliferation of three-dimensional(3D) printers, consumers in modern society can now print products of what they want three-dimensionally at home. However, consumers themselves would have to produce digital design maps that are compatible with 3D printers and to set up the optimum printing quality and temperature, as well as to pay for maintenance and repair of 3D printers and to respond to any possible lawsuits related to intellectual property right about designs in order to make possible consumer-tailored manufacturing through 3D printing. However, in reality, since it is very difficult for consumers to respond to these issues, it is necessary to develop services that perform 3D printing on behalf of consumers in the desired direction. Motivated by this objective, this study investigated user experiences on Shapeways(www.shapeways.com), which is a global online 3D printing product and sales companies, from many viewpoints in order to obtain insight into 3D printing services and modes which were preferred by consumers. The study result showed that quantitative evaluations on usability, search process, price adequacy, re-visit intention, diversity of design, and satisfaction of design was scored low overall. Furthermore, this study acquired insight about consumer-tailored 3D printing services through constructive suggestions on multi-language support, openness of manufacturing process, simultaneous operation of online and offline sites, design-oriented consumer-tailored manufacturing service, services that ensure delivery safety and product durability, and surface finishing services. This study is expected to provide a wide range of opinions not only on 3D printing service platform development but also on related industry and research.