Abstract
The non-Newtonian fluid is one type of shear thickening fluid which applied to process the complicated products. In this study, the new method of shear thickening fluid polishing (STFP) was used to polish the alloy steel SCM435 gears and the principle and performance of polishing process were also introduced. In the polishing process, the inclination angle of gears was believed to be an important parameter that affects the pressure and surface quality at different position on the tooth surfaces because it determines the contact between the polishing fluid and the tooth surface of the gear. The influence of the inclination angles on the pressure distribution and characteristics of fluid flow was performed by simulation process. The inclination angles of 0, 4, 8, 12, 16, 20 and 24 degrees were chosen in this study. As a result, the best inclination angle of gears is about 16 degree in the machining process. The tooth surfaces of gear have been in contact with the polishing fluid and the produced pressure reaches of 14.88 kPa. In addition, the influence of polishing speed on pressure were carried out in this study when inclination angle was established about 16 degree. The produced pressure on tooth surfaces increased with increasing the polishing speed. The results indicated that the different polishing speed also greatly affects the surface quality and machining efficiency. Therefore, the suggested machining method can become a suitable processing method for polishing the complicated products.
Highlights
The gears have been widely used in the fields of mechanics, industrial machinery, and engines
According to the simulation results, the suitable inclination angle of workpiece and polishing speed values were determined for increasing the pressure area which generated on the tooth surface of the gear in polishing process
The pressure distribution with variable of inclination angles (IA) is first analyzed by finite element analysis (FEA)
Summary
The gears have been widely used in the fields of mechanics, industrial machinery, and engines. In this study, the shear thickening fluid polishing (STFP) method was carried out and used to improve the surface roughness of gear. Science & Technology Development Journal – Engineering and Technology, 3(3):443451 is one type of the non-Newtonian fluids and applied to polish the complicated shapes In this method, the fluid pressure is generated by shear thickening of the polishing fluid when it is moved on the machining process 21,22. The surface quality of gear and efficiency of the machining process were greatly improved The machining parameters such as inclination angles and polishing speeds are simulated to evaluate their influence on pressure distribution and flow characteristics on the gear surface. According to the simulation results, the suitable inclination angle of workpiece and polishing speed values were determined for increasing the pressure area which generated on the tooth surface of the gear in polishing process.
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