Advanced Materials Research Vol. 505

Abstract: Rice husk is a form of agricultural biomass that provides an abundant silicon dioxides source. This study used rice husk ash as a material to prepare paper coating. Silica powder has been synthesized by the refluxing of rice husk ash with HCl 1,2 and 3 M at different time (60 and 120 min.) The silicon dioxide extraction yield reached 85% and was effect by concentration of HCl solution and reaction time. The structure of the obtained silica powder were characterized by X-Ray Fluorescence (XRF), Particle size distribution (PSD), X-Ray diffraction (XRD), CIE L*a*b* (Visible spectrophotometer) and Scanning Electron Microscope (SEM). The highest purity of silica sample were 98.7% SiO2, CIE L*a*b* = 94.79 +0.48 +1.24, ∆E ≈ 3.28 (white powder) and 2Ɵ = 22o (silica). Particle had a uniform size less than 3 μm. The paper coating was made from acrylic resin mixed with synthesized silica that refluxing by HCl 2 M 120 min at different ratio (2%, 4% and 6%) and paper coated with a gravure printing machine. The qualities of paper coating were analyzed from viscosity, Transparency (Density) and color gamut of inkjet printing. The paper coating that mixed synthesized silica from rice husk 4% was highest qualities because have viscosity 358 ± 24.99ctp., Density = 0.19, and widely color gamut.

Abstract: The goal of the paper is to design a system that helps to select cutting parameters in cutting processes. The approach is based on industrial engineering methods. The result is the parameters that take into account all the existing restrictive factors. First, a reasonable process to select cutting parameters is proposed. And then, the corresponding tools are designed. To achieve the standardization of the resources and process of cutting parameter selection, the resource contents and query actions are made in a uniform form. Finally, the selection of cutting parameters is realized within a flow management framework. It provides a scientific basis for selecting cutting parameters in actual production

Abstract: High usage of hardened steel in the automotive, gear, bearing, tool and die making industries, makes it a highly suitable material for industrial production and research. This study was undertaken to investigate the performance of coated ceramic insert with different edge preparations in terms of cutting force and surface roughness. Plain turning experiments were carried out under dry cutting condition at two different cutting speeds and feed rates with a constant depth of cut. The workpiece material is ASSAB DF-3 hardened steel with a 55 ±1 HRC hardness. Results showed that insert edge preparation had a direct influence on the radial and feed forces but not on the tangential force. The use of T-land edge preparation results in the lowest radial and feed forces. In terms of surface finish, the use of honed with finishing wiper insert results in obtaining the lowest surface roughness values. Feed rate had a significant effect on surface roughness whereby by increasing feed rate, the surface roughness value also increased, whereas the effect of cutting speed was found to be insignificant. Increasing cutting speed resulted in lower feed and tangential forces however by increasing feed rate all cutting forces increased.

Abstract: An intelligent computation is proposed for a matching selection of cutter tools in this paper. A matching selection of cutter tools based on an intelligent computation and knowledge reasoning is realized by three steps. At the first, a cutter tool is roughly selected by inference machine of an expert database. Then a matching scheme of cutter tools will be realized by a RBF neural network. Finally, a matching selection scheme of cutter tools is determined by fuzzy inference machine. It is shown that method proposed here is of a higher efficiency for a matching selection of cutter tools in processing and manufacturing of CNC machine.

Abstract: Based on the grinding-hardening test, the types of two-side direction burr were classified; the changing rules of size in the two-side direction burr and the influence of grinding method on the maximum burr size were studied. The results shown, that the size of the burr was increased gradually from the cut-in point to the cut-out point of grinding in one-passes grinding. In two-passes grinding or three-passes grinding, the burr was basically the same. Under this experimental condition, the changing of grinding method affected the height of the burr more, but little to the thickness of the burr root. Meanwhile, the ways of restraining or decreasing the size of the burr in grinding-hardening machining were developed.

Abstract: Titanium alloys are desirable materials for aerospace industry because of their excellent combination of high specific strength, lightweight, fracture resistant characteristics, and general corrosion resistance. Therefore, the chip morphology is very important in the study of machinability of metals as well as the study of cutting tool wear. The chips are generally classified into four groups: continuous chips, chips with built-up-edges (BUE), discontinuous chips and serrated chips. . The chip morphology and segmentation play a predominant role in determining machinability and tool wear during the machining process. The mechanics of segmented chip formation during orthogonal cutting of titanium alloy Ti–6Al–4V are studied in detail with the aid of high-speed imaging of the chip formation zone. The finite element model of chip formation of Ti–6Al–4V is suggested as a discontinuous type chip at lower cutting speeds developing into a continuous, but segmented, chip at higher cutting speeds. The prediction by using finite-element modeling method and simulation process in machining while create chips formation can contribute in reducing the cost of manufacturing in terms of prolongs the cutting tool life and machining time saving.

Abstract: Magnetic separation is an emerging and promising technology in biological sample preparation. In this paper, a high-intensity and high-gradient magnetic separation system was developed to separate magnetic nanobeads from aqueous solution. This system mainly consisted of a magnetic separator, a micropump and an electronic timer. The magnetic separator was designed by placing two columns of permanent magnets in an aluminum holder. Two magnets in each column were laid out in repelling mode and a hole between the two columns was used to accommodate a 1.5 ml tube. Working with the electronic timer, the micropump was employed to remove waste solution at a certain rate after magnetic nanobeads captured onto the sides of the tube wall. The experiments for separation of magnetic nanobeads with diameters of 150 nm and 50 nm using the developed magnetic separation system were conducted to optimize the key parameters of the system including nanobeads concentration, separation time and flow rate. The separation efficiencies of magnetic nanobeads increased as the nanobeads concentration and the separation time increased, whereas decreased when the flow rate was increased. Experimental results proved that the proposed magnetic separation system was able to separate magnetic nanobeads (diameters of 150 nm and 50 nm) with separation efficiencies of 99% and 90% in 30 min and 150 min respectively.

Abstract: Under the present major circumstances of global energy crisis and earth environmental degradation, as a country with rapid economic development, China has an increasing demand for energy. One way to solve this problem in China is to promote the development of clean renewable energy. This research takes this view as a starting point and discusses the solar energy application methods and the possibility focusing on the solar energy application status and problems for residential buildings in severe cold regions. At first, we carry out the theoretical discussion on the solar energy residence, and discuss the solar energy comprehensive utilization for multi-floor buildings and the methods and possibilities of building integration design, so as to play an instructive role in the solar energy comprehensive utilization research and practical application in our severe cold regions.

Abstract: The paper takes an example of Shenyang and investigates the components of municipal solid wastes (MSW); comparing estimation based on the given trend of the organic degradation matters in some typical cities in China. It finally puts forward the future ways to reuse the municipal solid wastes.

Abstract: From the demand of electro-optical countermeasure resources scheduling, a new scheme is provided to effectively solve the reasonable scheduling of resources in this paper. The framework of the collaborative scheduling system of electro-optical countermeasure resources is constructed based on Multi-Agent system. The resources scheduling is simplified through establishing the correspondence of tasks, roles and Agents. Integration methods of a variety of electro-optical countermeasure information are also discussed to provide technical support for electro-optical countermeasure resources collaborative scheduling.