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1

Safety management for polluted confined space with IT system: a running case

Hwang J.-J., Wu C. H., Zhuang Z.-Y., Hsu Y. C.

International Journal of Occupational Safety and Ergonomics

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2015

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Vol. 21, No. 2

233--239

EN

This study traced a deployed real IT system to enhance occupational safety for a polluted confined space. By incorporating wireless technology, it automatically monitors the status of workers on the site and upon detected anomalous events, managers are notified effectively. The system, with a redefined standard operations process, is running well at one of Formosa Petrochemical Corporation's refineries. Evidence shows that after deployment, the system does enhance the safety level by real-time monitoring the workers and by managing well and controlling the anomalies. Therefore, such technical architecture can be applied to similar scenarios for safety enhancement purposes.

2

An analysis of the influence of decompression cavity on the cold hobbing processes

Hsu Y. C., Lin H. S.

Journal of Achievements in Materials and Manufacturing Engineering

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2008

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Vol. 28, nr 1

55-58

EN

Purpose: This study aims to investigate the influence of decompression cavity on the cold hobbing processes. Design/methodology/approach: In the current study, the rigid-plastic finite element method would be used to analyze the influence of billets with different decompression cavity on cold hobbing processes. Findings: There must be an optimal shape of decompression cavity which requires the minimum hobbing load, but achieves the optimal profile precision and strengthened results needed in formed workpiece. Research limitations/implications: There were four different designs in billet. One was a cylinder without decompression cavity, and the others were the cylinders with truncate-cone, point-cone and semispherical decompression cavity respectively, with different shapes but almost the same volumes. Practical implications: Through the simulation analysis, the influence of decompression cavity with the same volumes but different shapes on the load needed in process, the change of workpiece features, and the strengthened effects on workpieces in both open type and closed type cold hobbing processes, would be explored. Originality/value: The finite element method is employed to analyze the influence of different decompression cavity of billets on the cold hobbing process.

3

Minimum additional material volume prediction for preform product by using abductive network and Taguchi method

Lin F. C., Lin S. Y., Hsu Y. C., Lee B. C., Kwan C. T.

Archives of Materials Science and Engineering

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2008

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Vol. 33, nr 1

57-60

EN

Purpose: To predict the minimum value of additional material volume for an acceptable preform product. To predict an acceptable preform product without shape defect such as unfilling in a closed-die forging operation. Design/methodology/approach: In order to reduce the number of experiments, an orthogonal array from the Taguchi's experimental method will be utilized to design the process parameter combinations for database sets to promote the prediction precision. Also, in order to reduce the number of experiments to get the minimum additional material volume of preform, the abductive network is applied to synthesize the data sets obtained from the numerical simulation. Findings: The minimum additional material volume can be determined as 7.6% for an acceptable preform product in conjunction with the billet settle position, E, of 11.8 mm and the aspect ratio of width to height, B/H, of 1.4. Research limitations/implications: The Taguchi method can be used to narrow the ranges of process parameters for database sets which can promote the precision of abductive network to search for the the minimum additional material volume for an acceptable preform product. The abductive network is applied to synthesize the data sets obtained from the numerical simulation of the reduced ranges of the process parameters. Practical implications: The combination of the abductive network and Taguchi method can be used as a reference and guidance for the development of searching the minimum or maximum value of one of the process parameters, accompanying by the other suitable parameters. Originality/value: An assessment model of the closed-die forging process is developed using a neural network system and Taguchi method. Based on the developed neural network, the additional material volume of preform product, one of the forging process parameters can be minimum accompanying by the other suitable process parameters to get an acceptable product.

4

Study on the design of table mechanism with multi-degree of freedom

Hsieh C. F., Lin W. S., Hsu Y. C.

Archives of Materials Science

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2008

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Vol. 29, nr 3

131-140

EN

Purpose: Thus, this paper will bring up a new design for computer desk with multi-degree of freedom. Design/methodology/approach: Computers play a major role in our everyday life. The high utility rate and long using period of computer make the design of computer desk important. So far, the most popular computer desk is a non-flexible structure, which has less spare space. Findings: This new type mechanism design has six links and five joints, where includes four rotation pairs and one sliding pairs. The height and the position of the desktop are adjustable. This design can be also applied to operation tables or beauty salon chairs. Practical implications: To design an adjustable table is hopping to create ideal circumstances in our daily life. This paper mainly focuses on the design that can satisfy most people’s needs. Originality/value: The newly developed table can lower the physical harm after a long time use, and can increase the comfortableness in its adjustable function.