What is polishing?
In mechanical design, polishing is a common part treatment process. It is the process of completing pretreatments such as cutting or grinding to provide a smooth surface. Accuracy of geometry such as surface texture (surface roughness), dimensional accuracy, flatness and roundness can be improved.
One is the "fixed abrasive processing method" by fixing a hard and fine grinding wheel to the metal, and the other is the "free abrasive processing method" in which abrasive grains are mixed with a liquid.
Fixed grinding processes use abrasive grains that are bonded to the metal to polish protrusions on the surface of the component. There are processing methods such as honing and superfinishing, which are characterized in that the polishing time is shorter than the free grinding processing method.
In the free abrasive machining method, abrasive grains are mixed with a liquid and used for grinding and polishing. The surface is scraped by holding the part from the top and bottom and rolling a slurry (a liquid containing abrasive grains) over the surface. There are processing methods such as grinding and polishing, and its surface finish is better than that of fixed abrasive processing methods.
● Super finishing
● Fluid polishing
● Vibration polishing
In the same way, there is ultrasonic polishing, the principle of which is similar to that of drum polishing. The workpiece is put into the abrasive suspension and placed together in the ultrasonic field, and the abrasive is ground and polished on the surface of the workpiece by means of ultrasonic oscillation. The ultrasonic processing force is small and will not cause deformation of the workpiece. In addition, it can also be combined with chemical methods.