Some problems must be paid attention to during polishing operation

Some problems must be paid attention to during polishing operation
1. Polishing must be carried out in a clean and dust-free room. Because hard dust particles will contaminate the abrasive material and damage the nearly completed die surface.
2. Each polishing tool uses only one grade of polishing diamond paste and is stored in a dustproof or sealed container.
3. When converting the finer sand number, pay attention to whether the sand number of this level completely covers the upper level (coarser) sand grain, and wash your hands and workpiece.
4. At the beginning of polishing, it is necessary to deal with corners, corners, fillets and other difficult places to polish.
5. Special care shall be taken when dealing with sharp corners and edges. Be careful not to form rounded corners or round edges. Hard polishing tools shall be used for mold grinding and oilstone grinding as far as possible.
The polishing machine is composed of base, throwing plate, polishing fabric, polishing cover and cover. At the same time, the polishing damage layer should not affect the finally observed tissue, that is, it will not cause false tissue. At the same time, the sample shall also rotate and move back and forth along the radius of the rotary table to avoid local wear of the polished fabric too fast. During the polishing process, micro powder suspension shall be continuously added to keep the polished fabric at a certain humidity. The electric motor is fixed on the base, and the cone sleeve for fixing the polishing disc is connected with the electric motor shaft through screws. In order to achieve the purpose of rough polishing, the rotating speed of the rotary table is required to be low, preferably not more than 500r / min; The polishing time should be longer than the time required to remove the scratch, because the deformation layer must be removed. The polishing fabric is fastened on the polishing disc through the ferrule. After the electric motor is powered on through the switch on the base, the sample can be polished by hand on the length of the rolling polishing disc. The purpose of rough polishing is to remove the polishing damage layer. This stage should have the maximum polishing rate. The surface damage formed by rough polishing is a secondary consideration, but it should also be as small as possible; The second is fine polishing (or final polishing), which aims to remove the surface damage caused by rough polishing and minimize the polishing damage of ultrasonic mold polishing machine.
The polishing cover and cover can prevent dust and other sundries from falling on the polishing fabric when the machine is not in use and affecting the use effect. The best way to solve this contradiction is to divide polishing into two stages.
The pivot of polishing machine operation is to get the maximum polishing rate, so as to remove the damaged layer during polishing as soon as possible. During fine polishing, the speed of rotary table can be improved appropriately, and the polishing time is appropriate to throw away the damaged layer of coarse polishing.