| dc.description.abstract | With the advancement of technology, industries are striving for smaller and more precise product development. Stainless steel tubes, in particular, hold a significant position across various industries, including construction, medical, food processing, and chemical sectors. This experiment proposes a device for internal polishing of stainless steel tubes, incorporating an electrolytic gas-mixing device to assist in the process. It explores the effects of different parameters—such as the inner diameter and length of the stainless steel tubes, processing voltage, and electrolyte flow rate—on the polishing results, aiming to achieve improved surface roughness.
In terms of the research process, initial experiments were conducted using stainless steel tubes with an inner diameter of 7 mm and a length of 20 mm. The electrolytic gas-mixing method was applied by introducing bubbles into the electrolyte, with the gas volume controlled via a power supply and the electrolyte flow rate precisely regulated. Ultimately, the method of electrolytic plasma polishing was tested. The experimental results revealed that the polished surface of the workpieces was not uniform. The surface near the water inlet was significantly smoother and had lower surface roughness, while the surface near the water outlet appeared matte and had higher surface roughness. Electrolyte flow rate plays a critical role in internal electrolytic plasma polishing, as each combination of workpiece parameters (inner diameter, length) and processing voltage requires a specific electrolyte flow rate to successfully ignite the arc.
For example, with a stainless steel tube of 7 mm inner diameter and 20 mm length, the optimal surface roughness achieved at the water inlet ranged from 0.047 μm to 0.065 μm, with surface quality improvement rates of 92.0% to 88.9%.
This method demonstrates the potential to significantly enhance the internal surface quality of stainless steel tubes, especially with careful control of electrolyte flow and processing parameters. | en_US |