Polishing machines, also known as grinders, are often used for mechanical grinding, polishing, and waxing. The working principle of the polishing machine is: the motor drives the sponge or the wool polishing disc mounted on the polishing machine to rotate at a high speed. Since the polishing disc and the polishing agent work together and rub against the surface to be polished, the paint surface contamination, the oxide layer and the shallow layer can be removed. The purpose of the trace. Understand how the polishing machine works, and easily operate the polishing machine!
The polisher consists of an electric motor and one or two polishing wheels. The high-speed rotation of the polishing wheel is driven by the motor, so that the polished portion of the lens is in contact with the polishing wheel coated with the polishing agent to generate friction, and the edge surface of the lens can be thrown to a smooth and bright light. There are two types of polishers. One is modified along with the spectacle frame polishing machine and can be called a vertical polishing machine. The polishing wheel material uses a laminated cloth wheel or a cotton cloth wheel.
; The other is a newly designed lens-specific polishing machine called a right-angle plane polishing machine or a horizontal polishing machine. The utility model is characterized in that the polishing wheel surface is inclined at an angle of 45° with the operation table surface, which is convenient for processing operation, and the lens is in a right angle contact with the polishing wheel surface during polishing, thereby eliminating the accidental abrasion caused by the non-polished portion. The polishing wheel material is made of ultra-fine emery paper and compressed thin felt. Ultra-fine sandpaper is used for rough polishing, and thin felt has a special polishing agent for fine polishing.
Next plastic mill The editor of the polishing equipment factory tells you how the polishing machine works.
The key to polishing machine operation is to try to get The maximum polishing rate is used to remove the damaged layer generated during polishing as quickly as possible. At the same time, the polishing damage layer will not affect the final observed tissue, ie, it will not cause false tissue. The former requires the use of coarser abrasives to ensure a larger polishing rate to remove the polished damage layer, but the polished damage layer is also deeper; the latter requires the use of the finest material to make the polished damage layer shallower, but polished The rate is low.
; The best way to resolve this contradiction is to divide the polishing into two phases. The purpose of rough polishing is to remove the polished damage layer. 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. Secondly, fine polishing (or final polishing). The purpose is to remove surface damage from rough polishing and minimize polishing damage. When the polishing machine is polished, the sample grinding surface and the polishing disc should be absolutely parallel and evenly pressed on the polishing disc, taking care to prevent the sample from flying out and creating new wear marks due to too much pressure.
;;; At the same time, the sample should be rotated and moved back and forth along the radius of the turntable to avoid local wear of the polishing fabric too fast. During the polishing process, the fine powder suspension should be continuously added to maintain the humidity of the polished fabric. Too much humidity will weaken the wear scar, so that the hard phase in the sample will appear embossed and the non-metallic inclusions in the steel and the graphite phase in the cast iron will produce a "tailing" phenomenon; if the humidity is too small, the sample will be generated due to frictional heat generation. The temperature rises, the lubrication is reduced, the surface is tarnished, and even dark spots appear, and the light alloy will throw the surface.
; In order to achieve the purpose of rough throwing, the rotation speed of the turntable is required to be low, preferably not exceeding 600r/min; the polishing time should be longer than the time required to remove the scratch, because the deformed layer is also removed. After rough polishing, the surface is smooth, but it is dull and dull. Under the microscope, there is a uniform and fine wear scar, which needs to be removed by fine polishing.
; The speed of the turntable can be properly increased during fine polishing, and the polishing time should be omitted to throw away the damage layer of the rough throw. After fine polishing, the polished surface is as bright as a mirror. No scratches can be seen under the bright field conditions of the microscope, but the wear marks are still visible under phase contrast lighting conditions. The polishing quality of the polishing machine seriously affects the structure of the sample, which has gradually attracted the attention of relevant experts. At home and abroad, a lot of research work has been done on the performance of the polishing machine. Many new models and a new generation of polishing equipment have been developed, which have been developed into various semi-automatic and fully automatic polishing machines from the original manual operation.