How to solve the problem of automatic polishing machine “over-polishing”

In the entire process of using the automatic polishing machine, the user encounters a relatively large problem, which is “over-polishing”. The polishing time period is too long and the quality of the surface of the equipment mold is not good. Under normal circumstances, “orange” will appear. “Skin”, “pitting” and other situations. Next, our company will tell you how to solve the problem of “over-polishing” of automatic polishing machines.

When the product workpiece appears “orange peel”, it is mainly caused by the excessive temperature of the mold surface layer or excessive carburization. When the grinding and polishing pressure is relatively large, the grinding and polishing time period is relatively long, which will also cause the appearance of the equipment. “Orange peel” situation. So what is “orange peel”? That is, the surface layer is irregular and rough. The relatively hard stainless steel plate can withstand the grinding and polishing pressure is relatively large, and the relatively soft stainless steel plate is very prone to excessive grinding and polishing.

So, how to eliminate the “orange peel” of the product workpiece? We must first remove the defective surface layer, and then the grinding grain size is slightly coarser than the sand number used before, and reduce the quenching temperature by 25 ℃, and then the stress is being carried out. Clean up, then use a mold with a finer sand number to polish, and then polish with a lighter intensity until the result is satisfactory.

The so-called “pitting” is the appearance of dot-like pits on the surface layer of the product workpiece after polishing. This is mainly because some non-metallic impurity residues will be mixed in the metal product workpieces, which are usually hard and brittle oxides. If the polishing pressure is too high or the polishing time period is too long, these impurities and residues will be pulled out from the surface layer of the stainless steel plate, forming dot-like micro-pits. Especially when the purity of the stainless steel plate is insufficient and the content of hard impurity residue is high; the surface layer of the stainless steel plate is corroded and rusted or the black leather is not cleaned up, “pitting corrosion” is more likely to occur.

How to eliminate the “pitting” situation? The surface layer of the product workpiece is polished again. The grain size of the mold sand used is one level coarser than the one used before, and the polishing force must be small. In the future, use soft and sharp oilstones for subsequent polishing steps, and then perform polishing procedures after achieving satisfactory results. When the automatic polishing machine is polishing, if the size of the grit is less than 1 mm, it is necessary to prevent the use of softer polishing tools. The intensity of grinding and polishing should be as small as possible, and the time period should be as short as possible.

Post time: Apr-25-2021