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Chen S.L.,Daxue Rd | Chang H.-J.,Daxue Rd | Lee J.-N.,No.840 | Chen S.-T.,No.64
Applied Mechanics and Materials | Year: 2013

The current evaluation of machine tools' machining performance relies on instruments measurement but not actual/real machining method. However, using instruments measurement evaluation is not only costly but also due to the installation defect of instruments, resulted in performance examination errors. This paper proposed to use titled condition of 10-15 degrees on the base of part's clamp with VERICUT® software to perform simulation for achieving the purpose of examine tools' machining performance. Findings showed that under the tilted condition of 10-15 degree, turn-mill type of interruptions occurred and unable to proceed. Modification on the cone frustum and anti-cone frustum design was applied to overcome turn-mill interruptions issues. This simulation results showed achievement of turn-mill type tools' machining performance evaluation with anti-cone frustum design. © (2013) Trans Tech Publications, Switzerland.

Hwang S.-J.,No.64 | Li S.-T.,No.64 | Hwang Y.-L.,No.64 | Chen C.-H.,No.64
Applied Mechanics and Materials | Year: 2013

The scroll compressor has the conjugate motion of meshing by the fixed scroll and the planet scroll. Several kinds of geometrical curves can be adopted to form the scroll compressor profile such as involute of circle with variable and constant radius, algebraic spiral, and so on, to improve the performance of scroll compressor. This study proposes a new scroll profile design using elliptic involute and two-envelope method to create a new conjugate meshing scroll of variable cross section. The curve of the scroll section on both sides can be specified as an arbitrary mathematical function. First, the base scroll swept out by the central base circle. Next, the base circle translation path envelope of the planet scroll is moved by the basic involute curve. The base circle translation path envelope is the first envelope. The second envelope generated by the planet scroll conjugate profile is the fixed scroll. By using two-envelope method, the variety of conjugate scroll can be produce with the cross section and symmetrical variables for parametric design. © (2013) Trans Tech Publications, Switzerland.

Wang A.,No.64 | Cheng L.-Y.,No.64 | Chu Z.-H.,No.64 | Da Wu M.,No.64
Applied Mechanics and Materials | Year: 2011

How to reconstruction traffic accident promptly and precisely is stakeholder's goal. However, most traffic accident data records are incomplete was found. Exploring the reasons, people forgets to keep scene in complete because of saving injuries, recover the traffic or moving incident for escaping penalty. The minimum information list record the emergency data people have to record in first time. The research came from when three dimension reconstruction method is used, there is a gap with respect to reality. How to ensure the reconstruction animation conform to real situation. The minimum information list is a good way. The idea also can apply to other perspective. © (2011) Trans Tech Publications.

Yang T.-S.,No.64 | Li S.-Q.,No.64 | Chang S.-Y.,No.64
Advanced Materials Research | Year: 2011

This study applies the finite element method (FEM) in conjunction with an abductive network to predict the workpiece surface parameters, including contact area ratio, surface roughness, skewness and kurtosis, of asperity flattening in sliding contact for metallic thin film on die material during the metal forming process. Contact area ratio, surface roughness, skewness and kurtosis are investigated for different process and material parameters, such as sliding distance, elastic modulus of film, normal pressure and bulk strain rate by finite element analysis. The abductive network is then utilized to synthesize the data sets obtained from numerical simulations, and the prediction model is established for predicting surface parameters. The predicted results of the surface parameters from the prediction model are in good agreement with the results obtained from the FEM simulation of workpiece asperity flattening in sliding contact for metallic thin film on die material. © 2011 Trans Tech Publications.

Liu Y.-S.,No.64 | Lin H.-C.,No.64 | Yang K.-M.,No.64
2016 5th International Symposium on Next-Generation Electronics, ISNE 2016 | Year: 2016

In this paper, the transmittance of the micro-encapsulated cholesteric liquid crystal was changed by the pump beam. The opto-thermal effect, induced by the PEDOT absorbing layer, results in the variation of the transmittance on the cholesteric liquid crystal thin films. We discussed the possibility of utilizing this material for the application of flexible electronic papers by evaluating the thickness of cholesteric liquid crystal layer and the PEDOT layer, respectively. The results showed that the patterning effect is better for the sample of 12 μm thick cholesteric liquid crystal layer than that of 25 μm at the same excitation conditions and the same thickness of the PEDOT layer. And the patterning effect is better for the sample of 7.5 μm thick PEDOT than that of 5.5 μm at the same excitation conditions and the same thickness of the cholesteric liquid crystal layer. We also successfully achieved a gray-scale pattern on cholesteric liquid crystal using shutter to control the light excitation time. To explore the reason why the cholesteric liquid crystal appeared a transmittance variation when pumped, two experiments were checked: (1) Under the optical field within the pump intensity range of this experiment, the transmittance of cholesteric liquid crystal were irrelevant to the angles between the pump and probe polarizations. (2) As for the opto-thermal effects, a simple heat-conducting model was proposed to fit with the experimental results. The theoretical and experimental results agree well with this model. © 2016 IEEE.

Chang Y.-N.,No.64 | Kuo C.-M.,No.64
Applied Mechanics and Materials | Year: 2013

In this paper, a series resonant converter with high-frequency high-voltage transformer for plasma generator is presented. The high-frequency, high-voltage electric source is designed by employing a series load-resonant converter with the plasma generator as part of the electric circuit. The equivalent circuit of this high-frequency transformer modeled by the introduction of the stray capacitance is proposed and the circuit model of the high-voltage plasma generator is conducted as well. Thus, the overall model of the high-voltage plasma generator is built and the designing procedures for appropriate selections of the corresponding resonant-circuit parameters can be established. Finally, a high-voltage plasma generator with 220V, 60Hz, and 1kW input, plus a 22 kHz and over 8kV power converter output, is realized and implemented. © (2013) Trans Tech Publications, Switzerland.

Tsai Y.-H.,No.64 | Hwang S.-J.,No.64 | Hwang Y.-L.,No.64
Applied Mechanics and Materials | Year: 2013

This paper proposes a method of the geometric design for a new conjugate tooth profiles based on the envelope theory and coordinate transformation method, the mathematical and geometric models for the conforming gears design are proposed. A comparison study on the dynamic contact stress with the involute gear drive is carried out in this work. © (2013) Trans Tech Publications, Switzerland.

Hsu H.J.,No.64 | Lee S.Y.,No.155 | Jiang C.P.,No.64
Applied Mechanics and Materials | Year: 2014

The aim of this study is to develop a novel maskless-curing slurry stereolithograhy and sintering process which can fabricate high strength ceramic parts. Three dimension printing of additive manufacturing method was used. High performance stereolithography slurry, which was composed of zirconia powder as structure material and methanol as a solvent and a dispersant, could be prepared with colloidal processing. During layer casting, the diaphanous slurry can penetrate into pores of the subjacent layers. After drying, the binder in the penetrated liquid could connect the fresh layer and subjacent layers. Eventually, a gel-like green block could be built layer by layer. In the exposed region, the resin contained in the green block was cured to connect the zirconia powders to be a part of the rigid green part. The obtained rigid green part was then heated up to 300°C for binder burnout, and then sintered at 1350°C to obtain a high dense zirconia ceramic part. The proposed method of maskless-curing slurry was briefly described and it was proved that the good capacity of solidifying thin layer. © (2014) Trans Tech Publications, Switzerland.

Shu K.-M.,No.64 | Shu K.-M.,National formosa University | Wang Y.-J.,No.64 | Wang Y.-J.,National formosa University | And 2 more authors.
Applied Mechanics and Materials | Year: 2014

The acoustic solid horns are the important parts in high power ultrasonic vibrating systems, and its design is critical to the quality and the efficiency of ultrasonic welding. The using of multiple function acoustic horn can reduce machining time very effectively. This paper performs the analysis and design of multiple function acoustic horns for ultrasonic welding of plastic by employing ANSYS finite element software. Firstly, the theoretical dimensions of the horns are calculated. Moreover, their natural frequencies and amplitudes are obtained through the simulations of ANSYS. Experiments are currently being set up to verify the validity of the analytical results. © (2014) Trans Tech Publications, Switzerland.

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