What is the principle of stainless steel tube polishing?
Sep 08, 2022
The principle is
The principle is: using polishing tools and abrasive particles or other polishing media to modify the surface of the workpiece.
Polishing refers to the use of mechanical, chemical or electrochemical action, so that the workpiece surface roughness reduction, in order to obtain a bright, smooth surface processing method. Is the use of polishing tools and abrasive particles or other polishing media to modify the surface of the workpiece.
Polishing does not improve the dimensional accuracy or geometric accuracy of the workpiece, but is intended to achieve a smooth surface or mirror gloss, and sometimes to eliminate gloss (extinction). The polishing wheel is usually used as the polishing tool. The polishing wheel is generally made of multi-layer canvas, felt or leather, clamped on both sides with a metal circular plate, and its rim is coated with polishing agent evenly mixed with micro powder abrasive and grease.
When polishing, the polishing wheel rotating at high speed (the circumferential speed is above 20 m/s) presses to the workpiece, so that the abrasive will produce rolling and micro-cutting on the workpiece surface, so as to obtain a bright machining surface, the surface roughness is generally RA0.63-0.01 micron; When using a non - greasy matting polish, the bright surface can be matted to improve the appearance. Roller polishing is often used in mass production of bearing balls.
A large number of steel balls, lime and abrasive are placed in the inclined cylinder during rough throwing. When the cylinder rotates, the steel balls and abrasive will roll and collide randomly in the cylinder to achieve the purpose of removing the convex front of the surface and reducing the surface roughness. The allowance of about 0.01mm can be removed.
In the process of fine casting, steel balls and fur fragments are loaded into a barrel, and the continuous rotation for several hours can obtain a dazzling shiny surface. The polishing of precision line ruler is carried out by dipping the machining surface in polishing liquid, which is composed of chromium oxide micro powder with particle size of W5 ~ W0.5 and emulsion mixture. The polishing wheel is made of uniformly fine degreased wood or special fine felt, and its movement track is uniform and dense network. The surface roughness after polishing is not greater than Ra0.01 micron, and no surface defects can be observed under the microscope with magnification of 40 times. In addition, there are electrolytic polishing and other methods.
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