What is the polishing process?

Most people have this question: Many businesses now advertise that their products use a polishing process, but most of them don't know what exactly is a polishing process?

 In fact, the polishing process, as the name suggests, is the specific process of using polishing equipment and polishing materials to fine-process the surface of the product. The polished product has high finish and brightness.

The polishing technology is divided into: (barrel polishing machine, centrifugal polishing machine, magnetic polishing machine, vibration polishing machine) mechanical polishing, electrolytic polishing, chemical polishing,

 (Barrel polishing machine, centrifugal polishing machine, magnetic polishing machine, vibration polishing machine) Detailed introduction and principle of mechanical polishing:

  When mass production of bearing steel balls, barrel polishing is often used. During rough polishing, put a large number of steel balls, abrasives and abrasives in the container. After the machine is started, the steel balls and abrasives are randomly rolled and collided in the barrel to achieve the purpose of removing the surface bulge and reducing the surface roughness.

  The margin of about 0.01 mm can be removed. During fine polishing, put steel balls, fine polishing abrasives and gloss agent in the wooden barrel, and then grind for the corresponding time to get a dazzling and bright surface.

  The polishing of the precision wire ruler is carried out by immersing the processed surface in a polishing liquid. The polishing liquid is a mixture of chromium oxide powder with a particle size of W5 to W0.5 and an emulsion.

  The polishing wheel is made of wood or special fine felt with uniform material and degreasing treatment. Its movement track is a uniform and dense network. The surface roughness after polishing is not greater than Ra0.01 micron. Observed under a microscope with a magnification of 40 times There are no surface defects.

    Mechanical polishing is carried out on a dedicated polishing machine, which eliminates the wear marks by the relative grinding and rolling action between the polishing material such as polishing stone and the grinding surface. It is divided into rough polishing and fine polishing.

  Use flexible polishing tools and abrasive particles or other polishing media to modify the surface of the workpiece. Polishing cannot improve the dimensional accuracy or geometric accuracy of the workpiece, but aims to obtain a smooth surface or mirror gloss.

  Adding the corresponding polishing liquid may quickly restore the metal surface to exceed the original luster without leaving any scars.

Principle and process of electrolytic polishing:

  The principle of electrolytic polishing of stainless steel is generally recognized as the mucosal theory. The main theory is that the metal ions detached from the workpiece and the phosphoric acid in the polishing solution form a phosphate film that is adsorbed on the surface of the workpiece. This mucosa is thinner at the protrusions.

  The concave part is thicker and dissolves quickly due to the high current density in the convex part. As the mucosa flows, the unevenness changes continuously, and the rough surface is gradually leveled.

  Electrolytic polishing process: degreasing-washing-rust removal-washing-electrolytic polishing-washing-neutralization-washing-passivation-packaging

Chemical polishing:

  Chemical polishing is aimed at occasions where the polishing requirements are not high and requires heating. As far as current technology is concerned, if the above three types of polishing can be used, chemical polishing should not be used, because the chemical polishing effect is poor and the overall cost is high.