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The working principle of polishing machine

2013-06-21 11:35:05


Polishing machine operation, the key is to try to get the maximum polishing rate, so as soon as possible to remove the damaged layer generated when polished. But also the polishing damage layer does not affect the organization of the final observed, that does not cause false organization. The former requires the use of coarse abrasive, in order to ensure a greater polishing polishing rate to remove the damage layer, but also deep polishing damage layer; the latter requires the use of the finest material, the polishing damage layer shallow, but the polishing rate is low.

To resolve this contradiction is the best way is to polish divided into two phases. Rough polishing purpose is to remove polishing damage layer, this phase should have the largest polishing rate, rough polishing surface damage is the formation of a secondary consideration, but can be as small as possible. Followed by fine polishing (or final polishing), which purpose is to remove surface damage resulting rough polishing, the polishing minimize the damage. Polishing machine polishing, grinding and polishing the sample should be absolutely parallel and evenly slight pressure on the polishing disc, pay attention to prevent the sample due to too much pressure while flying and generate new wear marks. And rotation of the sample should also be radially moved back and forth along the dial to prevent partial wear fast polishing cloth in the polishing process to continually adding powder suspension, the polishing cloth to maintain a certain humidity. Too much humidity polished wear scar weaken the role of the hard phase sample showing embossed and non-metallic inclusions in steel and cast iron graphite phase in a "trailing" phenomenon; humidity is too small, due to friction and heat cause the sample warming, lubrication decreases, grinding and dull, and even dark spots, will throw light alloy wound surface.

Fine polishing wheel speed when appropriate to improve, rough polishing polishing time to throw away the damaged layer is appropriate. Fine grinding after throwing bright as a mirror, in a bright field microscope under conditions not see scratches, but in contrast lighting conditions, you can still see the wear marks. Polisher seriously affect their quality sample organizational structure, has gradually attracted the attention of relevant experts. Polishing machine performance at home and abroad made a lot of research work, developed a lot of new models, a new generation of polishing equipment, being from the original manual operation developed into a wide variety of semi-automatic and fully automatic polishing machine.