Polishing Machine Polishing Rate
The polishing machine is also known as the grinder, which is often used for mechanical grinding, polishing and waxing. Its working principle is: motor drive is installed in the polishing machine of the sponge or wool pads high-speed rotation, by both pads and polishes and carries on the friction and stay behind the surface, which can achieve remove paint contamination, oxide layer, shallow. The rotation speed of the disc is usually at 1500-3000 r/min, which is infinitely variable speed, and can be adjusted at any time according to need.
(1) there are two kinds of pneumatic and electric power sources. Pneumatic type is safe, but needs air source; It is easy to solve the power supply problem, but it is necessary to pay attention to the safety of electricity.
(2) it is divided into two functions: grinding sand/polishing machine and simple type polishing machine. Double - function industry USES grinding wheel polishing metal material, and can replace the disc to make car paint. This machine is heavier, it is 2-3 kg, but it is very stable and not easy to damage. The speed of this type of machine can be adjusted, suitable for professional beauty care personnel to use. The simple type polishing machine is actually drill, small volume, unadjustable rotating speed, and difficult to master the balance when used. Professional cosmetologists generally do not use such models.
(3) there are three kinds of high-speed polishing machine, medium speed polishing machine and low speed polishing machine according to the speed classification. The speed of the high-speed polishing machine is 1750-3000 r/mAn. The speed of medium speed polishing machine is 1 200 -- 1 600 r/rain, adjustable speed; The speed of low - speed polishing machine is 1 200r/min, the rotating speed is unadjustable.
Main accessories of polisher
The main attachment of the polishing machine is the disc. The disc is mounted on the polishing machine, which is combined with the grinding agent or polishing agent to finish the grinding and polishing work.
The classification of the disc
The connection mode of the disc and polishing machine can be divided into the following three types: bolt plate: suitable for the polishing machine with bolt joint. Nut plate: suitable for polishing machine with nut joint. Suction cup: suitable for the polishing machine with suction cup. The polishing machine of the head with a hard plastic with screws polyester chassis (also called tray), the chassis of the working face can be stuck with a nylon stick flat object easily, so you can choose according to need of various suction-cup pads, just throw the disc can be attached to the chassis, use rise very convenient.
The disc is classified by material
Fleece disc: the wool disc is the traditional cutting material, the abrasive ability is strong, the function is large, after the grind will leave the swirl. Generally used for the grinding and polishing of ordinary paint, use caution when used in transparent paint. Generally divided into white and yellow, the bottom of the disc is automatically pasted to realize the rapid conversion of the disc. The general white wool throwing disc has a strong cutting force, which can remove the serious defects of the paint, and make quick removal of the orange peel or the polishing mark with a thicker wax polish. The yellow wool throwing disc is less than white wool and the light is weak. It is usually used to polish the surface of the paint with fine wax and remove the polished marks and scratches. Maintenance instructions: clean the woolen disc with a comb brush or air nozzle regularly to remove the wax. If the wool disc sleeve is blocked in the operation, remove it, install a clean wool pan and continue to polish it. In the same time, the used woolen trays should be dried and washed with a comb brush. Caution should be used with warm water, do not use hot water, strong alkaline detergent or solvent rinse. Use a washing machine to clean only gently. It is usually better to use air to dry them, preferably not to dry them.
Sponge disc: its cutting force is weaker than the wool disc, leaving no swirl, which can effectively remove the defects of the medium paint. The polishing disc bottom has automatic paste, can quickly transform the polishing wheel. It can be used for the grinding and polishing of ordinary paint and transparent paint. It is usually used for polishing and waxing after wool polishing. The speed of the polishing machine is 1 500 ~ 2 500 r/rain, no more than 3, 000 r/min. The color can be divided into the following three kinds: yellow plate: generally made abrasive disk, hard, used to eliminate the oxidation film or scratches. White dish: generally make the disc, soft, delicate, to eliminate hair line scratches or polishing. Black dish: usually make restore dish, soft and soft, suitable for the car body for transparent paint polishing and general paint reduction. The disc can be divided into the following three types: straight cutting: fast, thermal and flexible, with a diameter of 152. 4 mm x 50. 8 mm. Flat cutting type: large area, good heat dissipation, relatively stable, diameter x thickness of 203. 2 inln x (25. 4 ~ 50. 8) mm. Corrugated type: the working fluid is not easy to splash, the diameter of x thickness is 203. 2 mm x (25. 4 ~ 38. 1) mm. Maintenance instructions: after rinsing in warm water, remove the moisture and place it in a clean place to dry. Do not use soap or detergent to wash, do not machine wash or dry cleaning, do not use comb brush or screwdriver clean sponge wheel.
The rabbit wool pads: rabbit hair pads cutting force between the wool pads and the sponge pads, at the bottom of the automatic paste, can be used in the polishing of ordinary car body paint and transparent paint, suggested polishing machine speed of 1 500 ~ 2500 r/min.
The key to the polishing machine is to try to get the maximum polishing rate so as to remove the damage layer as soon as possible. At the same time, the polishing damage layer will not affect the final observed tissue, which will not cause the fake tissue. The former requires the use of coarse abrasive to ensure that there is a large polishing rate to remove the damaged layer of the polishing, but the polishing damage layer is also deep. The latter requires the finest materials to make the polishing damage layer lighter, but the polishing rate is low.
The best solution to this contradiction is to divide the polishing into two stages. The roughing purpose is to remove the abrasion damage layer, which should have the maximum polishing rate in this stage. The surface damage of the roughcast is a secondary consideration, but it should also be as small as possible. The second is the fine throw (or final throw), which is designed to remove the surface damage from the rough cast, which minimizes the polishing damage. When polishing the polishing machine, the sample grinding surface and the disc should be absolutely parallel and evenly pressed on the disc, to prevent the sample from flying out and the pressure is too high to produce new abrasion marks. At the same time should also make sample rotation and moving back and forth along the wheel radius direction, in order to avoid local wear too fast in the process of polishing polishing cloth to keep adding powder slurry, keep polishing cloth certain humidity. The moisture content can reduce the grinding effect of polishing, so that the hard phase of the sample shows the phenomenon of "trailing" of the graphite in the non-metallic inclusions and the graphite in the steel. Humidity is too hour, because the friction heat will make the sample temperature rise, the lubrication action reduces, the grinding surface loses luster, even appear the black spot, light alloy can throw the surface. In order to achieve the purpose of rough-throwing, it is required that the rotation speed is lower, preferably not exceeding 600r/min; The polishing time should be longer than the time needed to remove the scratches, since the deformation layer should be removed. Rough and smooth, but dull, under the microscope to observe the uniform fine grinding, to be eliminated.
The speed of the rotary table can be improved properly, polishing time can be used to discard the damaged layer. After finishing, the polishing surface is bright as the mirror. No scratches can be seen under the microscope, but it can still be seen under the condition of phase contrast. The quality of polishing machine's polishing quality seriously affects the organization structure of the sample, which has gradually attracted the attention of relevant experts. At home and abroad on the performance of the polishing machine made a lot of research work, developed many new models, a new generation of polishing equipment, are from the original manual operation developed into a variety of semi-automatic and fully automatic polishing machine.