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RISS 인기검색어
- 검색키워드
- 저자 : Yan-Cherng Lin (검색결과 4 건)
- 무료
- 기관 내 무료
- 유료
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Machining Characteristics of Hybrid EDM with Ultrasonic Vibration and assisted Magnetic Force
Yan-Cherng Lin,Fang-Pin Chuang,A-Cheng Wang,Han-Ming Chow 한국정밀공학회 2014 International Journal of Precision Engineering and Vol. No.
In this investigation, an ultrasonic vibration and an assisted magnetic force are integrated with the electrical discharge machining(EDM) to develop a hybrid process of EDM with ultrasonic vibration and assisted magnetic force (EDMUVAMF), and then the hybridprocess is adopted to explore the effects of the main machining parameters on the material removal rate (MRR), electrode wear rate(EWR), surface roughness (SR) and morphologies of the machined surface in machining SKD 61 mold steels. Moreover, the effectson expelling the debris from the machining gap are also studied via evaluating the discharge waveforms, and analyzing themorphology of the machined surface. The bottleneck correlated with large area using EDM process would be overcome when theoptimal parameters of the hybrid process of EDMUVAMF is obtained. From the experimental results shown, the hybrid process ofEDMUVAMF can improve the machining performance. The MRR was increased significantly and the SR was reduced to amelioratethe machining efficiency and machined surface quality. The hybrid process revealed the potential for the applications in large areavia EDM technique.
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Optimization of EDM parameters for ZrO2 and Al2O3 ceramics using Taguchi method
Yan-Cherng Lin,Jung-Chou Hung,Han-Ming Chow,A-Cheng Wang 한양대학교 세라믹연구소 2015 Journal of Ceramic Processing Research Vol.16 No.2
Electrical Discharge Machining (EDM) is the most commonly used technique in mold and die manufacturing. The purpose of this investigation was to optimize the machining parameters of EDM on zirconium dioxide (ZrO2) and aluminum oxide (Al2O3). During the EDM process, the surface of electrically nonconductive ceramic was covered with adhesive conductive copper (Cu) and aluminum (Al) foils to attain the threshold of electrical conductivity for the EDM process. The machining characteristics associated with the EDM process such as material removal rate (MRR) and surface roughness (SR) were explored through the experimental study according to an L18 orthogonal array using the Taguchi method. The analysis of variance (ANOVA) was conducted to examine the significant machining parameters which affect the machining characteristics. As the experimental results show, peak current and pulse duration significantly affected MRR and SR. In addition, the optimal combination levels of machining parameters were also determined from the response graph of signal-to-noise (S/N) ratios for each level of machining parameters. A practical and convenient process for shaping the electrically nonconductive ceramics was developed which featured high efficiency, high precision, and high-quality of surface integrity.
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Joining of the Sinter Hardening Pully by Sinter Brazing
Cheng Chao-Hsu,Lin Yi-Ching,Lin Yan-Cherng,Hwang Lih-Ren 한국분말야금학회 2006 한국분말야금학회 학술대회논문집 Vol.2006 No.1
This research mainly focuses on the development of sinter brazing technology for improving the process related to belt pulley made by sinter hardening. As the machine process of belt pulley takes up more than half of the total manufacturing hours, we propose changing the process to pulley groove brazed and bonded with pulley disc by applying sinter brazing to belt pulley. With the new process, the belt pulley is expected to reduce manufacturing cost to 70% of the original process by applying the sinter brazing technology; and the belt pulley bound by sinter brazing only loses 10% bonding strength compared with the original process.
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Characterizing the Machining Effects of Lateral Electrodes in Electrical Discharge Machining
A-Cheng Wang,Lung Tsai,Yan-Cherng Lin 한국정밀공학회 2014 International Journal of Precision Engineering and Vol. No.
Electrical discharge machining (EDM) can easily machine the high strength materials. However, EDM is conventionally the up-anddownmachining for the mold and hole; grooves and curved surfaces on the side walls of the blind hole are difficult produced ingeneral EDM. This study developed two electrodes that could create the lateral discharge on the workpiece in EDM. One is an elasticelectrode, where two thin copper plates are stuck on the two rectangular pieces of spring steel that could produce a lateraldeformation in EDM. This electrode uses the driving force to change the lateral shape of the steel plate to perform the side dischargemachining; the other one is the lateral feeding electrode, where two inclined electrodes with angle 45o in the up and down positionare jostled to create side deformation, and side grooves or side curved surface could be performed in the discharge process. As aresult, the elastic electrode performs poor efficiency in the lateral EDM because of the fast wearing of the thin copper plate. However,lateral feeding electrode enhances the discharge effect of the elastic electrode and results in good efficiency of the plow grooves orcurved surface produced in the blind hole.
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