It is surface treatment.
Brushing is a kind of abrasive belt grinding process, through the abrasive belt on the metal surface grinding process, to remove defects in the metal surface, and the formation of a certain degree of roughness, the grain uniform decorative surface.
From the process, drawing process is to make the surface of the workpiece regular uniform surface texture, from the movement, drawing process in the equipment is done to and fro repeated movement, while the polishing process is done in the plane polishing machine on the trajectory. The two are different in principle, the actual way is different.
Extended information:
. p>Sheet metal considerations:
1, unfolding way to fit, to facilitate the saving of materials and processability.
2, a reasonable choice of gap and wrapping method, T = 2.0 below the gap 0.2, T = 2-3 gap 0.5, wrapping method using a long side of the package short side (door category).
3, reasonable consideration of the tolerance of external dimensions: negative difference to the end, positive difference to half; hole size: positive difference to the end, negative difference to half.
4, pumping teeth, pressure riveting, tearing, punching bumps (packages), and other positional directions, draw a sectional view.
5, check the material, plate thickness, to plate thickness tolerance, special angle, bending corner radius (R = 0.5) to test folding and determine the unfolding.
Baidu Encyclopedia - Sheet Metal
Baidu Encyclopedia - Wire Drawing