Papers by Keyword: Finishing

Abstract: A practical nanopowders dispersion process is designed in order to solve self-cleaning finishing agent reunion.Seven kinds of typical dispersing agent are used for dispersing nanopowders. nanoTiO2-doped ZnO composite powders are chosed as raw material, polysodium acrylate as dispersant, nanopowders are effectively dispersed to get a self-cleaning finishing agent with a uniform dispersion, the average particle size at about 30-40 nm . By orthogonal test, optimum dispersion process conditions were: nanoTiO2 / ZnO powders 1 g / L, polysodium acrylate dispersant 1 g / L, dispersion methods were shear emulsification dispersion method and ultrasonic dispersion method,nanosample stirring time 10min, high shear revolutions 3500r / min, high shearing time 30min, ultrasonic time 5min, ultrasonic power 1 000w.

Abstract: As a measure to perform a burnishing process easily on an NC lathe, the authors propose a new method using a flank face positioned in a few millimeters lower part of the nose cutting edge of a tool. In the experiment, giving a fixed depth of burnishing (t=1, 2 and 4μm/pass), the carbon steel workpiece (S45C) of φ30mm which had been turned at V=200m/min and f=0.15mm/rev was burnished by predefined number of times. As a result, the surface roughness improved in nearly proportion to the total depth of burnishing and the roughness value of Rz≈10μm measured after turning could be improved to Rz≈2.5μm. Utilizing the feed control with an accuracy level of micron meters of the NC lathe, an attempt to control the dimensional accuracy of the workpiece diameter in the order of micron meters was also made. As a result, the workpiece radius came down constantly by 0.6~0.8 times in proportion to the tool depth of burnishing (t=1μm/pass), which reveals that the dimensional accuracy of the workpiece diameter could be controlled by the proposed burnishing process utilizing a fixed depth of burnishing system. Using the same burnishing process, circularity of the workpiece Δr could be improved to Δr≈2μm from Δr≈4μm measured after turning.

Abstract: Maintaining positions in the highly competitive environment of global markets in the field of rolling bearings causes constant need for production efficiency increase. The products now have higher quality demands along with shorter production times and reduced production costs. The aim of the article is to optimize finishing manufacturing processes of bearing races, after the analysis of quality demands of large-diameter bearings, manufacturing options and examining of current knowledge about hardened steels turning, focusing on the replacement of grinding operations by hard turning operations with intention to minimize machine time and production cost together with keeping the quality of machined surface.

Abstract: Cotton fabrics were treated with 1,2,3,4-butanetetracarboxylic acid (BTCA) and then dyed with a natural dye extracted from henna (Lawsonia inermis Linn.) leaves. The effect of BTCA concentration on the dyeing properties of cotton fabrics was studied by measuring the K/S values of the treated dyed cotton fabrics. The wrinkle recovery angles of the treated dyed cotton fabrics were assessed. The results proved that the BTCA treated cotton fabrics showed increase dye uptake of cotton fabrics. Concentration of BTCA enhances the durable press and tensile strength of the dyed cotton fabrics. Fastness properties of these to wash, rub and light have also been discussed.

Abstract: The car seat fabric is the main part of the car interior, the water-and oil-repellent performance is an important factor of the antifouling performance, this article get the optimum technological parameters by doing the finishing experiments of the polyester viscose car seat fabric water-and oil-repellent.

Abstract: The main effects in centrifugal barrel finishing result from the impact of the mutual impacts, the interaction of extrusion, the rotation shear and the sliding force, it can’t be calculated that the force created by the collision among the media and the velocity of the media at present. It is concluded that the velocity of the media is 5.107m/s through simulating the motion in EDEM, which is 2.28% error with theoretical calculation. Using orthogonal experiment to analyze different sizes and material media, it is concluded that media size mainly affects the tangential force, normal force and rolling friction.

Abstract: The key of swirling airflow finishing is how to generate the swirling airflow. In the paper, three swirling airflow head are discussed according the manners of tangential inflow. By means of FLUENT, the general software of CFD, the swirling airflow field from different airflow head is simulated. The simulation results are shown by the flow line graphs, tangential velocity, radial distribution graphs, etc. All we have studied is as the basis for the determination of the application scope of each swirling airflow head.

Abstract: In order to further improve the surface quality in LS-WEDM, a new procedure as Gas-liquid Combined Multiple Cut (the finishing is in gas) is presented and has carried on the contrast experiment to conventional WEDM multi cutting processing in the paper. the single factor and orthogonal experimental design method were used to study Effects of pulse duration, pulse interval, peak current, servo voltage and servo feed on roughness in finishing in gas, By range analysis, analysis of variance and the binary table the optimum level of the above five factors was found in consideration of the above five factors interaction. The paper provides basis for advanced study of finishing process of LS-WEDM.

Abstract: Finishing process (Grinding and Polishing), is still manually performed, specially in free form surface parts. This involves a series of remaining problems, mainly related with the geometrical shape of the finished part. In traditional manually finishing task, the final quality aspect of the part is the only parameter to be controlled. This supposes a lack in the quality parameter control, mainly in high level parts, as in automotive, aeronautics or mould making parts. Manual finishing has not any control about the amount of material removed, during finishing process, affecting this way to the final geometrical shape of the product. This is the reason why this investigation proposes an exhaustive research of the parameter influencing the finishing tasks, and defining a finishing methodology adapted for an automatic process executed by a spherical robot. Making it an automatic way, and controlling paths, tool, abrasive, and defining a mathematical model for the finishing process, final quality of the part and product will be optimized, from a quality point of view, at the same time process time and cost is reduced.

Abstract: The objective of this paper was to study the application of Monochlorotriazine-β-cyclodextrin (MCT-β-CD) on cotton fabric and its influence on dyeing and fastness properties of the hot-dyeing reactive dye (with MCT reactive group), Drimarene Red X-6BN, on cotton. The optimum curing condition for MCT-β-CD on cotton was investigated. MCT-β-CD treatment was found to be unaffected on the dyeing properties of the dye on cotton. The color fastness to washing of the dyed fabric was improved in the presence of MCT-β-CD, while the light fastness was unaffected.