چكيده به لاتين
Today, in the Industry and mechanical engineering and manufacturing, the machining process is very important. One of the most important wear processes that is widely used in construction and production is the abrasive flow machining process, which is considered a non-traditional process and is used by industries and production workshops for finishing different surfaces. In this process, material removal from the surface (machining) is done with the help of fine abrasive particles. This process is used for operations such as polishing, polishing, polishing of inaccessible and complex surfaces, radius cutting of edges, etc. In this research, the effect of three controllable parameters in this process including: the mesh size of abrasive particles, the effect of the number of cycles on surface finishing, the effect of the work piece cross-section, and also, in addition to these parameters, the effect of extrusion pressure on the improvement of surface quality, has been studied. This polishing process is done on a seamless carbon steel pipe. An AFM device was built in the workshop to investigate and research the abrasive flow process and show the effect of parameters as well as perform polishing tests. The input force of the device to flow the abrasive medium on the inner surface is based on pneumatic pressure, and the pneumatic circuit of this device was designed and installed based on the input pressure and efficiency of the device. In this research, the experiments were also conducted using the experimental design method in order to evaluate the optimal points and parameters affecting the process. The results showed that the parameters investigated in this process have the most effect on the output of the process (surface finish), in such a way that reducing the size of the abrasive particles, increasing the number of cycles and the angularity of the work piece-work section increases the quality. The payment levels have been internalized. In general, based on the obtained results, we found that in the best polishing conditions with the abrasive flow process in this research, in parameters with mesh 200, cycle 100 and smooth and curved sections with 8 bar pressure, the most optimal surface polishing was achieved.
