Chih Ming Chen

Chih Ming Chen
National Chin-Yi University of Technology

About

31
Publications
846
Reads
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50
Citations
Citations since 2017
11 Research Items
35 Citations
2017201820192020202120222023024681012
2017201820192020202120222023024681012
2017201820192020202120222023024681012
2017201820192020202120222023024681012

Publications

Publications (31)
Article
Full-text available
The performance improvement of advanced electronic packaging material is an important topic to meet the stringent demands of modern semiconductor devices. This paper studies the incorporation of nano-alumina powder and thermoplastic elastomer (TPE) into thermoplastic polystyrene matrix to tune the thermal and mechanical properties after injection m...
Article
This study presents a combined preventive maintenance strategy for bearings to accomplish the failure prevention of rotating equipment. The concepts of preventive maintenance and trend chart are introduced in the beginning. Next, as an illustration, this strategy installs four accelerometers at selected locations of the equipment to acquire vibrati...
Article
Full-text available
The jaw coupling with a flexible spacer is frequently used in the torque transmission between shafts with misalignment for machinery. Its torsional stiffness and limit torque closely determine the operational capacity and the dynamic characteristics of the system because the coupling is usually the most flexible link in the driving chain. In this s...
Article
Full-text available
This study presents a combined carbon footprint (CF) and environment damage assessment with a cradle-to-gate approach for an ignition coil. The process considers a data flow of product as the phases: raw materials preparation, part processing, final-product finishing, and packaging. The assessment was performed to explore an automotive ignition pen...
Article
Full-text available
With the development and application for the ultra-precision machinery industries and smart machinery have become prosperous. The precision transmission sub-system is an important part of the precision machinery equipment and smart machinery industries. Then shrapnel-type coupling is an important part of the precision transmission system. In the sh...
Article
Full-text available
Epoxy with low viscosity and good fluidity before curing has been widely applied in the packaging of electronic and electrical devices. Nevertheless, its low flexibility and toughness renders the requirement of property improvement before it can be widely acceptable in dynamic loading applications. This study investigates the possible use of 2-hydr...
Article
Full-text available
Locknut is a critical component used in the precision machinery and its stable service performance over a long period of time in a variety of different environments presents a crucial challenge. In this study, a flank-locking precision locknut was pretreated in an immersion corrosion of 5 wt% NaCl solution to simulate the possible corrosion effects...
Article
The influence of combined corrosion and vibration to the anti-loosening performance of a precision locknut used in a machine tool is investigated. Firstly, the locknut was submerged in 5% NaCl solution according to ASTM B895 standard for corrosion testing. The locknuts, after submerged in 1-hr, 2-hr and 4-hr periods, respectively, were then install...
Article
Automobile manufacturers have been contributing a large quantity of carbon emission on the earth for decades. This study examined an environmental impact problem of an automobile ignition coil within a supply chain. An assessment based on the methodology of Life Cycle Assessment to certify total carbon emission that a product contributes to the env...
Article
Precision locknuts are widely used in rotary machinery especially the machine tools operating in high speed with high precision. The flank-locking locknut studied in this paper is mainly employed in spindle and ball screw assemblies of machine tools to secure the preloading in the bearings required for better structural stiffness. In service the lo...
Article
In this study, the anti-loosening characteristics of a precision flank-locking locknut fabricated under various machining processes and tested in different dynamic environments were investigated. The control parameters considered include the tightening torque and thread pitch of the set screw, machining process on the end plane of locknut, and vibr...
Article
The study attempted to observe the surface characteristics of the flank lock type precision locknut which was assembled in a vertical type and operates under different tightening speed. The speed setting was in according with the specifications of 4rpm, 6rpm and 8rpm conditions to set up this experiment. A type of 2TML lubricant was used. The exper...
Article
Full-text available
In recent years, environmental issues, such as climate change and global warming due to the excessive development of industry, have attracted increasing attention of citizens worldwide. It is known that CO2 accounts for the largest proportion of greenhouse gases. Therefore, how to reduce CO2 emissions during the life cycle of a product to lessen it...
Article
An experimental study of the thermal performance characteristics of TMA glass transitiontemperature is developed. Three kinds of nanopowder, namely, alumina, silica and carbonblack, are selected and mixed with reactive diluent to prepare a novel epoxy nanocomposite. Byanalysis ofvariance, it is found that the control factors are significant factors...
Article
The study investigated the variation of friction coefficient of a vertical assembly of flank lock type precision locknut at the different tightening speed by a torque and axial force test machine. The tightening speed is set at 4rpm, 6rpm and 8rpm, respectively. The lubricant is a type of 2TML. Surface morphology was observed before and after the t...
Article
This study investigated the wear characteristics and anti-loosening characteristics of flank lock type precision locknut in the dynamic percussion vibration test. The experiment was conducted by using horizontal realistic dynamic percussion vibration test machine. The objective is to simulate the loosening condition of the locknut which was assembl...
Article
This study is to explore the mixture of the different amounts of nanopowders with different photopolymerizable monomer, polyfunctional monomer and acrylic epoxy resin to prepare novelty nanocomposite materials in green production process. The preparation of nanopowder enforced photopolymerizable resin substrate adopted green production process with...
Article
This study produced a regularly arranged membrane, called anodic aluminum oxide (referred AAO), by mean of anodic oxidation treatment. The structure of AAO can be molecular self-assembly and its pore size is consistent. Also, the manufacturing process cost is low. These properties make the AAO be a nanotemplate material. This study further created...
Article
In this research, a novel composite material is prepared by using light irradiation and thermal curing polymerization under a green production process. The methodology is to alter the composition of the materials, including amounts of hardener, monofunctional monomer, polyfunctional acrylic monomer and epoxy resin. The process is also accompanied w...
Article
In this paper, epoxy, diluents, nanosilica powders and hardeners are mixed and cured form nanocomposites under different production conditions such as the amount of added nanopowders, diluents, etc. Through the use of an impact tester and a Shore durometer, the influences of the amount of added diluents and silica on mechanical properties are inves...
Article
Nanocomposite samples containing epoxy resin, glass fiber and 0~2 wt.% SiO2 nanopowder are prepared. The effects of SiO2 addition on the water absorption rate, glass transition temperature (Tg) and dynamic mechanical properties of the various samples are then observed. The water absorption of the nanocomposite specimens is then compared with that o...
Article
This paper is to investigate the characteristics of re-use precision locknuts of the machine tools spindles in the vertical assembly under different effective diameters, locking axial forces and clasp screw locking torques in the static tests for the axial force change rates. The results with the new flank locking precision locknuts are compared to...
Article
In this paper, the effects of strengthening epoxy matrices with nanopowders are discussed. Investigate the changes of reaction viscosities after adding different hardeners, nanoparticles and diluents to the polymer matrices. Analyze the applications to the automatic electronic packaging. The results show that different species in the curing reactio...
Article
As the machine tool industry moves towards high speed and high precision, we must have detection technology for the mechanical properties of fasteners, in order to overcome technical bottlenecks. This article is especially aimed at machine tools and special-purpose machines that commonly use clasp locking precision locknuts. In this research, the a...
Article
Epoxy resin nanocomposite samples containing 0~3wt.% reactive diluent and 0~3wt.% silica nanopowder are prepared. The preparation process is presented for solvent-free and greenmanufacturing. The storage modulus, loss modulus and glass transition temperature of the various samples are then evaluated via Dynamic Mechanical Analysis (DMA). For sample...
Article
Nanocomposite samples containing epoxy resin, glass fiber and 0~2 wt.% SiO2 nanopowder are prepared. The effects of SiO2 addition on the chemical resistance, glass transition temperature (Tg) and dynamic mechanical properties of the various samples are then observed. The chemical resistance of the nanocomposite specimens is compared with that of pu...
Article
This study investigates the resulting nanocomposite material formed by hot-forming and molding epoxy resin containing diluent, nanosilica powder, and hardener. The effects of different processing conditions on the composite material, such as post-processing, nanopowder content, thinner amount, etc. The optimal processing conditions can be discovere...
Article
In this study, the Taguchi experimental design methodology is used to optimize the composition of a nanopowder/epoxy resin material comprising Al2O3, SiO2, carbon black nanopowders, epoxy resin and diluent. A Taguchi orthogonal array is employed in planning the configuration of the samples for the experiment. The signal-to-noise (S/N) ratios, and t...
Article
In this paper, we present the function of the processing conditions (the amount of filler or diluent in epoxy resin, whether post-curing or not) in thermal properties of the modified silica/epoxy nano-composite materials based on thermal gravimetric analysis (TGA).The results is showed that after post-processing for the nanocomposite materials have...
Article
Polymer dispersed liquid crystal (PDLC) films are fabricated with various compositions of E7 liquid crystal (LC), 2-Hydroxy ethyl methacrylate (HEMA), Methyl methacrylate (MMA), n-butyl methacrylate (nBMA), Ethyl methacrylate (EMA), Tetraethylene glycol diacrylate (TEGDA), and Benzoin. The results show that the refractive index of the PDLC films is...
Article
Polymer dispersed liquid crystal (PDLC) films are fabricated using E7 liquid crystals, tetraethylene glycol diacrylate (TeGDA) crosslinking agent, and 0–66.49 mol % 2-hydroxy ethyl methacrylate (HEMA). The effects of different levels of HEMA addition on the microstructure and electro-optical properties of the PDLC samples are examined using scannin...

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