Influence of Abrasives on Powder Machinery
Influence of Abrasives on Powder Machinery
Due to the long-term working process of powder machinery, there will be many factors that cause equipment wear. For example, the hardness and shape of the material and the cross-sectional shape of the abrasive particles perpendicular to the advancing direction are the main factors that affect the working efficiency of the classifier. What are the impacts?
①Abrasive hardness:
Generally speaking, under the same working conditions, the harder abrasive can make the workpiece produce a larger amount of wear. In the process of abrasive wear, the surface protrusions of the abrasive or large abrasive are pressed into the surface of the workpiece and moved in the surface layer.
②Shape of abrasive grains:
If the abrasive particles are polygonal, the radius of curvature of the tip of the edge is an important factor affecting the wear of the workpiece. Abrasive particles with a large radius of curvature of the tip are easy to cut metal, and the depth of indentation into the metal surface is large, which improves the plastic deformation degree of the material surface.
③When the abrasive grains and the material have horizontal cutting motion, the angle between the front edge of the polygon and the advancing direction of the abrasive grains:
This is similar to the case of metal cutting tools cutting metal. When the abrasive particles with larger rake angle move forward, they mainly squeeze the material. Most of the metal in the furrow is discharged from the groove in a rheological manner, and a small part is elastically deformed, and a chip is rarely formed.
Due to the close relationship between the shape and size of the abrasive particles and the direction of the interaction between the abrasive and the workpiece metal. Abrasives such as minerals and rocks are generally brittle materials, and they will break and break in the process of contacting the workpiece. In industrial practice, observing the shape of abrasive particles helps to predict and control the wear amount of the classifier, and can effectively avoid the wear problem of powder machinery.
