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Worksite power tools-the use and precautions of

by:WORKSITE     2021-01-06
Use and precautions of polishing machine

Instructions for use



The key to the operation of the polishing machine is to try to get the maximum polishing rate so that it can remove the damage layer generated during polishing as soon as possible. At the same time, the polishing damage layer should not affect the final observation result. The former must require the use of coarser abrasives to ensure a higher polishing rate to remove the polished damage layer, but it will also make the polishing damage layer deeper; the latter requires the use of the finest material to make the polishing damage layer shallower , But the polishing rate is low. The best way to solve this contradiction is to divide the polishing into two stages. Rough polishing is to remove the polished damage layer, so this stage should have the maximum polishing rate. The surface damage caused by rough polishing is a secondary consideration, but it should be as small as possible; the second is fine polishing (or final polishing) , Its purpose is to remove the surface damage caused by rough polishing and minimize polishing damage.



When polishing with a polishing machine, the grinding surface of the sample and the polishing disc should be absolutely parallel and lightly pressed on the polishing disc evenly. Care must be taken to prevent the sample from flying out and creating new wear marks due to excessive pressure. At the same time, the sample should be rotated and moved back and forth along the radius of the turntable to avoid abrasion of the polishing fabric. At the same time, the fine powder suspension should be added continuously during the polishing process to keep the polishing fabric at a certain humidity. Carry out rough polishing first, the rotating speed of the turntable should be appropriately low, preferably not more than 500r/min; the polishing time is longer than the time required to remove the scratches. Afterwards, the turntable speed can be appropriately increased during the fine polishing, and the polishing time should be appropriate to throw away the damage layer of the rough polishing. After polishing, the polished surface is as bright as a mirror, and no scratches can be seen under the bright field of the microscope, but wear marks can still be seen under phase contrast illumination.



The polishing quality of the polishing machine seriously affects the structure of the sample, which has gradually attracted the attention of relevant experts. In recent years, a lot of research work has been done on the performance of polishing machines at home and abroad, and many new models and a new generation of polishing equipment have been developed. The original manual operation is developing into a variety of semi-automatic and fully automatic polishing machines. .



Precautions



The structure of the polishing machine is simple, and daily maintenance is still required. The method of use should be proper. Pay attention to the following points during use: When the polishing machine continuously works for too long, the friction and heat generation temperature of the polishing roller will be high, which will make the leather surface easy to burn. Operate after cooling down; clean the surface of the polishing roller before and after work, and wax it to keep the roller surface smooth and dust-free; during use, the pressure of the feed roller should be properly controlled to avoid too much resistance, and the electric appliance will easily burn out due to heat; The lubrication of each rotating part of the transmission chain keeps the transmission accurate and reliable.
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