Below, the manufacturer of the Aluminum Wheel Polishing Machine shares solutions to common problems in the polishing process of the polishing machine:
The problem encountered during daily polishing is “over-polishing”, which means that the longer the polishing, the worse the quality of the mold surface. There are two phenomena of over-polishing: “orange peel” and “pitting”. Excessive polishing occurs mostly in mechanical polishing.
2. The reason why the workpiece appears "orange peel"
The irregular rough surface is called “orange peel”. There are many reasons for producing “orange peel”. The common cause is due to overheating or excessive carburization of the mold surface. Excessive polishing pressure and long polishing time are generated. The main reason for orange peel. Harder steels can withstand higher polishing pressures, and relatively softer steels are prone to over-polishing. Studies have shown that the excessive polishing time will vary depending on the hardness of the steel.
3. Measures to eliminate the "orange peel" of the workpiece
When surface quality is found to be bad, many people increase the polishing pressure and extend the polishing time. This practice tends to make the surface quality worse.
The following methods can be used to remedy:
The defective surface is removed, the particle size of the grinding is slightly thicker than the previous sand number, and then the grinding is performed, and the polishing force is lower than the previous one. The stress is removed at a temperature lower than the tempering temperature of 25 °C, and the fine sand number is used for polishing before polishing until a satisfactory effect is obtained, and polishing is performed with a lighter force.
4. Reasons for the formation of "pitting" on the surface of the workpiece
Due to some non-metallic impurities in the steel, usually hard and brittle oxides, which are pulled out from the surface of the steel during the polishing process to form micro-pits or pitting, the main factors causing "pitting" are as follows:
a. The polishing pressure is too large and the polishing time is too long.
b. The purity of the steel is insufficient and the content of hard impurities is high.
c. The surface of the mold is rusty.
d. Black leather is not removed.
information about aluminum wheel polishing machine : https://www.zhongyun-machine.com/product/wheel-polishing-machine/