The polishing machine is mainly used to polish away optical resin, glass and metal products after the edging, the grinding grooves left by the grinding wheel of the edging machine, so that the edge surface of the lens is smooth and clean, so as to be equipped with rimless or half-rim glasses . Here are the solutions to common problems of the polishing machine in the polishing process.
(1) Over-polishing The bigger problem encountered in the daily polishing process is "over-polishing", which means that the longer the polishing time, 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 cause of "orange peel" on the workpiece
The irregular and rough surface is called "orange peel". There are many reasons for "orange peel". The most common reason is that the mold surface is overheated or carburized. The polishing pressure is too large and the polishing time is too long. The main reason for "orange peel". For example: polishing with a polishing wheel, the heat generated by the polishing wheel can easily cause "orange peel". Harder steels can withstand higher polishing pressure, and relatively softer steels are prone to over-polishing. Studies have shown that the time for over-polishing will vary depending on the hardness of the steel.
(3) Measures to eliminate "orange peel" of workpieces
When it is found that the surface quality is not good enough, many people will increase the polishing pressure and prolong the polishing time. This practice often makes the surface quality worse. The following methods can be used to remedy:
Remove the defective surface, the grinded grain size is one level coarser than the previous sand size, and then grind, the polishing force is lower than the previous one. Perform stress relief at a temperature lower than the tempering temperature of 25 ℃. Before polishing, use a very fine sand number to grind until a satisfactory result is achieved, and finally polish with a lighter force.