Based on the number of previous studies, this study aims to investigate the effects of process parameters of an Electrochemical Machining process which are electrolyte concentration, voltage applied to the machine, feed rate of the electrode and Inter-Electrode Gap between tool and work -piece. Aluminum samples of 25 mm diameter x 25 mm height and 30mm diameter x 25mm height of the tool is made up of copper with a circular cross section with 2 mm internal hole. The design of the system is based on the Taguchi method. Here, the signal-to-noise (S/N) model, the analysis of variance (ANOVA) and regression analyses are applied to determine optimal levels and to investigate the effects of these parameters on surface quality. Finally, the experiments that use the optimal levels of machining parameters are conducted to verify the effects of the process parameters to the surface quality of the products. The results pointed a set of optimal parameters of the ECM process. The Inter-Electrode Gap between tool and work -piece has extremely effected on these Material Removal Rate and surface roughness. The Material Removal Rate increases with diseases in Inter-Electrode Gap, and Ra diseases with diseases in Inter-Electrode Gap. The experimental results show that maximum Material Removal Rate have obtained with electrolyte concentration at 100 g/l, feed rate at 0.0375 mm/min, voltage at 15V, and Inter-Electrode Gap at 0.5mm. The minimum Ra have obtained with electrolyte concentration at 80 g/l, feed rate at 0.0468 mm/min, voltage at 10V, and Inter-Electrode Gap at 0.5mm. This results has led to need studies on these parameters in Electrochemical Machining which are improving productivities and surface roughness of the products. Cite this article : Nhung N T B, Liem D T, Thanh T Q. The effects of the process parameters in electrochemical machining on the surface quality. Sci. Tech. Dev. J. -Engineering and Technology; 2(SI):xxx-xxx. 1 U n c o r r e c t i o n P r o o f Science & Technology Development Journal -Engineering and Technology, 2(SI):xxx-xxx contrast to the mechanical machining, and without 45 strong heating in the machining zones in distinction 46 to the methods like Electrical Discharge Machining 47

The effects of cutting fluids to health, environment, productivity and quality in machining operations have been discussed. MQL is green technology which is gradually applied in mechanical processing. The article has introduced about MQL cooling lubrication method in mechanical processing. Some previous research result have been made to clarify the meaning of this method. In addition, the comparison of the outputs of MQL, dry and wet methods has also been shown to show the effectiveness of the MQL method. Then, based on the MQL equipment being used at Tran Dai Nghia University, the authors designed the experiment to evaluate the impact of MQL parameters on the process outputs. Machining and optimization of that parameter. This paper presents of the MQL parameters optimization approach in which the multi-response outputs based on Taguchi's L9 orthogonal array method is used. During the turning AISI-1045 steel, the cutting temperature, the maximum of tool wear, and the surface roughness were measured. The MQL parameters which are ratio of soluble lubricant and water, pressure of spray head, flow volume of emulsion was simultaneously optimized by taking the multi-response outputs using Taguchi based grey relational analysis (GRA) into consideration. In turning experiments, three different flow volume of emulsion Q (40, 60, 80 ml/h), three different levels pressure of spray head P (3, 5, 7 bar) and three different levels ratio of soluble lubricant and water R (4, 6, 8%) were used. Here, three mathematical models were created using response surface regression methodology. The experiments had been done to investigate the effect of the MQL parameters to the turning process. As the results, the set of optimal MQL parameters had been pointed out to simultaneously minimize the cutting temperature, the tool wear and surface roughness. The Flow volume of emulsion 80 ml/h, Pressure of spray head 7 bar, Ratio of soluble lubricant and water 6% was observed to be the most effective. Lubrication (MQL) on cutting temperature, tool wear and surface roughness in turning AISI-1045 material. Sci. Tech. Dev. J. -Engineering and Technology; 2(SI):xxx-xxx. 1 U n c o r r e c t i o n P r o o f Science & Technology Development Journal -Engineering and Technology, 2(SI):xxx-xxx tionally, the machining of parts uses flood cooling in 36 which the jet of coolant is directed toward the cutting 37zone. Here, the coolant is deployed in large quantities. 38There are several disadvantages to using this method. 39The first one has to do with the cost of machining 40 and its disposal. Approximately fifteen percent of to-41 tal cost in machining is incurred by the coolant and 42 its disposal. The second one deals with a safety issue 43 for the operators. One problem that exists for opera-44 tors is that when they stay in contact with the coolant 45 for a long time, it may cause skin problems. The third 46 one is the effect on the environment. After machin-47

In this paper describes the design and fabrication of a wave flume and associated equipment. The water wave generation by a triangle wedge is examined in this paper. Wave flume is fabricated by a concrete flume which is 0.75-meter-wide, 1.3-meter-tall and 11 meters long. One side of the flume is made of concrete and the other side is made of clear mica sheets for observe the water wave profile. Wave flume is equipped with a triangle wedge which located at one end of the wave flume, and this triangle wedge can be move along the rail of the wave flume. The passive wave absorber which is made of honey comb which is located at the other end of the wave flume for absorbing energy waves generated from the wave maker. The wedge is controlled by a desktop computer through mathlab sofware. The wedge can be controlled move up and down at a prescribed speed and oscillation amplitude corresponding to the desired wave height and wave frequency. At the middle flume is equipped micro laser distance sensor which provides data-logging capability. Micro laser distance sensor can collect wave height and wave period through a small ball which is motioned in the tube which is assembled on the water surface and the small ball is very slight to avoid kinetic inertia energy. At the wave maker is equipped an Eccentricity Sensor which is used to measure the wedge position to feed back for desktop computer. Wave flume can generate the largest waves are about 0.2 meter high, a period about 1 second, and a wavelength about 1.5 meters. The waves generated by a oscillating wedge have been measured, analyzed to consider the generated wave energy.