(1) Excessive polishing The biggest problem encountered in the daily polishing process is "excessive polishing", which means that the longer the polishing time, the worse the quality of the mold surface. There are two kinds of phenomenon that excessive polishing occurs: namely, "orange peel" and "pitting". Excessive polishing mostly occurs in mechanical polishing.
(2) The reason for the appearance of "orange peel" on the workpiece The irregular and rough surface is called "orange peel". There are many reasons for the "orange peel". The most common cause is the overheating of the mold surface or excessive carburization. Excessive polishing pressure and long polishing time are the main causes of "orange peel". For example: polishing wheel polishing, the heat generated by the polishing wheel can easily cause "orange peel". Harder steels can withstand higher polishing pressures, 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 the "orange peel" of the workpiece When it is found that the surface quality is not well thrown, many people will increase the polishing pressure and prolong the polishing time. This approach often makes the surface quality worse. The following methods can be used to remedy: remove the defective surface, the size of the grinding is slightly coarser than the previous sand number, and then grind, the polishing strength is lower than the previous. Stress relief is carried out at a temperature lower than the tempering temperature of 25 ℃. Before polishing, use the finest sand number to grind until a satisfactory result is achieved, and finally polish with a lighter force. Dongchuang Xinchuangsheng Industrial Co., Ltd. specializes in polishing machine, wire drawing machine, automatic wire drawing machine, flat wire drawing machine, plate drawing machine, stainless steel drawing machine, flat drawing machine and other products. Everyone is welcome to inquire.