What problems should be paid attention to when grinding the inner hole of the impeller?

Depending on the purpose and requirements of the process,

Impeller grinding process methods have a variety of forms,

Its main purpose is to remove excess material from the workpiece.

So what problems should be paid attention to when grinding the internal hole on the interrupted surface of the impeller?

1, when there is a wide groove, keyway, or radial through hole on the surface of the inner hole, due to the intermittent phenomenon of the contact between the impeller and the hole wall during the grinding process, the shape error of the inner hole is very easy to occur, so corresponding measures must be taken.

 

2, in the grinding of holes with wide grooves on the surface of the inner hole, it is easy to produce horns at both ends of the wide groove, the measures should be taken are: try to use a large diameter of the long shaft; Appropriately increase the width of the impeller and repair the impeller with diamond in time.

 

3. When grinding the holes with keyways on the surface of the inner holes, it is often easy to produce "collapse Angle" at the edge of the keyway. At this time, the diameter of the impeller can be appropriately increased, the width of the impeller can be reduced and the rigidity of the long shaft can be improved. For higher precision inner holes, hardwood or bakelite can be embedded in the keyway before grinding the inner holes.

 

4. When grinding the radial through hole on the surface of the inner hole, the hole wall is easy to produce polygon. At this time, it can be prevented by increasing the diameter of the impeller appropriately, using the material with good stiffness as the long axis, and dressing the impeller in time. In the fine grinding of the above three types of intermittent surface, the amount of back cutting should be reduced and the number of "light grinding" should be appropriately increased to ensure the machining accuracy and surface roughness of the hole.

 

These are the problems that need to be paid attention to when the impeller grinds the hole on the interrupted surface.

In addition to these few considerations,

Also note that the grinding direction is basically vertical when grinding,

So as not to cause surface cracks affecting the beauty of parts,

Serious will also directly affect the quality of parts.