Introduction to the friction of decorative Perforated net an

2021-12-15

Under the action of external force, when two closely contacting objects move or have relative movement tendency, there will be resistance to this movement between the contact surfaces. This phenomenon is called friction. The friction force when there is only a tendency of relative movement is called static friction, and the magnitude of static friction changes with the change of the external force acting on the object; when the external force suppresses large static friction, the friction when the object produces relative motion is called dynamic friction . According to the different motion modes of two relatively moving objects, dynamic friction is pided into sliding friction and rolling friction. According to the friction state, that is, the surface contact condition and the thickness of the oil film, sliding friction can be pided into four categories, namely dry friction, boundary friction (smooth boundary), fluid friction (fluid smooth) and mixed friction (mixed smooth).

 

The friction between the two friction surfaces without any smoothing agent or pure metal holding the film is called dry friction. Of course, the manufacture of decorative punching mesh is also dry friction punching through the friction punching of the punch on the steel plate. Dry friction not found in engineering practice, because the appearance of any part is exposed to the atmosphere, not only an oxide film is formed due to oxidation, but also more or less wetted or "contaminated" by lubricating oil. At this time, its friction system, its friction coefficient will be significantly reduced. In mechanical design, friction that does not exhibit significant smoothness is usually regarded as dry friction.

 

The two friction surfaces are each attached with a thin boundary film, and the friction state where the two surfaces are still in contact with the convex peaks is called the edge