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나선준(S. J. Na),염영진(Y. J. Yum),전용수(Y. S. Jeon),양순용(S. Y. Yang) 유공압건설기계학회 2019 유공압건설기계학회 학술대회논문집 Vol.2019 No.11
Excavators are universal equipment used in many fields due to their high applicability and economics to various kinds of work. However, the environment in which the excavator is used is very poor, and users are exposed to various noises, vibrations, and dusts, as well as high risk of industrial accidents such as falling rocks and falling. Therefore, it is necessary to prevent the danger of the user when working in the hazardous area. In addition, various sensors are installed to collect and analyze a lot of information for the safety of the equipment. However, the current technology has the disadvantage that the system configuration is complicated and expensive, and the cost increases because the equipment must be collected again when attached to the test equipment going abroad. Therefore, in this paper, we construct an Internet Database for 1.5ton excavator and construct a system that can remote system the excavator while reducing development cost using commercial microcomputer.
G. Zhang(장고기),Y. S. Kim(김용석),Y. J. Yum(염영진),S. Y. Yang(양순용) 유공압건설기계학회 2020 유공압건설기계학회 학술대회논문집 Vol.2020 No.7
In metal printing, repeated failures may occur due to the introduction of new equipment or workflow, unfamiliar manufacturing parameter adjustments, and manufacturing errors caused by lack of experience, resulting in insufficient technical accumulation. In addition, undesirable elements may be caused due to insufficient removal of unnecessary elements. By minimizing or optimizing these factors, the failure of trial and error can be reduced, and this failure can be largely eliminated by software simulation. This study was conducted to correct the SSF (strain scale factor) and ASC (anisotropic strain coefficient) factors to improve the accuracy of the simulation software in the additive manufacturing process of martensitic C300 powder materials. The study of this calibration follows the process of determining the SSF and ASC of ANSYS Additive Print software. Based on the previous research literature, the parameters (physical and mechanical properties) of the C300 powder material used for simulation were established, and the parameters of the equipment were used as the process parameters of the sample manufacturing equipment. The shape of the sample for simulation was made with a cantilever beam, and the sample was produced using PBF (Powder Bed Fusion) equipment of W company. The corrected SSF and ASC factors in this study improve the prediction accuracy of the deformation caused by the shape or thermal effect during the additive manufacturing of C300 powder materials and equipment in the simulation software, thereby will increasing the success rate of the additive manufacturing and, reducing the trial and error.