System and method of magnetic abrasive surface processing

Patent metadata

Field	Value
Publication number	US-9579766-B2
Application number	US-201314381856-A
Country	US
Kind code	B2
Filing date	Feb 25, 2013
Priority date	Feb 28, 2012
Publication date	Feb 28, 2017
Grant date	Feb 28, 2017

Abstract

Disclosed are various embodiments for a system and method of processing a surface using a mixture containing magnetic particles. A mixture is disposed on a workpiece and exposed to a dynamic magnetic field. In response to the dynamic magnetic field, the magnetic particles of the mixture may move along the workpiece. The movement of the magnetic particles creates a pattern of grooves on the surface of the workpiece.

First claim

The invention claimed is:

1. A system, comprising:
a workpiece comprising a mixture disposed on a surface of the workpiece, the mixture comprising a plurality of magnetic particles and a plurality of abrasive particles;
a robotic arm comprising a workpiece holder holding the workpiece, the robotic arm configured to adjust a position of the workpiece; and
a magnetic field generator adjacent to the surface of the workpiece, where the magnetic field generator exposes the magnetic particles to a magnetic field extending between a pole tip of the magnetic field generator and the workpiece holder through the workpiece, the pole tip configured to cause the magnetic field to rotate with respect to the workpiece and workpiece holder, wherein the workpiece holder moves relative to the pole tip to displace the magnetic particles along the surface of the workpiece and generate a pattern comprising a plurality of grooves on the surface of the workpiece using the abrasive particles.

2. The system of claim 1 , wherein the magnetic field generator is further configured to adjust a characteristic of the plurality of grooves generated on the surface of the workpiece by adjusting an attribute of the magnetic field.

3. The system of claim 2 , wherein the attribute comprises at least one of a strength of the magnetic field, a rotation rate of the magnetic field, or a direction of the magnetic field.

4. The system of claim 1 , wherein the plurality of grooves comprise cross-hatched grooves.

5. A method, comprising:
applying a mixture comprising a plurality of magnetic particles and abrasive particles to a surface of a workpiece held by a workpiece holder;
exposing the mixture to a magnetic field produced by a magnetic field generator adjacent to the surface of the workpiece, the magnetic field extending between a pole tip of the magnetic field generator and the workpiece holder through the workpiece, where dynamically adjusting the magnetic field with respect to the workpiece and workpiece holder and moving the workpiece holder relative to the pole tip creates a pattern on the surface of the workpiece, the pattern comprising a plurality of grooves.

6. The method of claim 5 , wherein at least a portion of the plurality of grooves are non-continuous.

7. The method of claim 5 , wherein at least a portion of the plurality of grooves is continuous.

8. The method of claim 5 , further comprising adjusting an attribute of the magnetic field to adjust a characteristic of the plurality of grooves.

9. The method of claim 8 , wherein the attribute comprises at least one of a magnetic field strength, a rate of revolution of the magnetic field, or a direction of the magnetic field.

10. The method of claim 5 , wherein dynamically adjusting the magnetic field comprises rotating the pole tip of the magnetic field generator to cause the magnetic field to be dynamic with respect to the workpiece.

11. The method of claim 5 , further comprising:
applying a second mixture to the surface of the workpiece; and
exposing the second mixture to the magnetic field and dynamically adjusting the magnetic field with respect to the workpiece and the workpiece holder to adjust a roughness of the surface of the workpiece while maintaining at least a portion of the pattern on the workpiece.

12. A system, comprising:
a workpiece holder configured to hold a workpiece;
a mixture of magnetic particles and abrasive particles disposed on a surface of the workpiece; and
a magnetic field generator adjacent to the surface of the workpiece, where the magnetic field generator provides a magnetic field that extends between a pole tip of the magnetic field generator and the workpiece holder through the workpiece, wherein the magnetic field is rotating with respect to the surface of the workpiece and the magnetic field that generates a pattern on the surface of the workpiece by displacing the workpiece holder relative to the mixture on the surface of the workpiece, the pattern comprising a plurality of grooves on the surface of the workpiece.

13. The system of claim 12 , wherein at least a portion of the plurality of grooves are non-continuous.

14. The system of claim 12 , wherein at least a portion of the plurality of grooves is continuous.

15. The system of claim 12 , wherein the plurality of grooves comprise cross-hatched grooves.

16. The system of claim 12 , wherein the magnetic field generator affects a characteristic of the plurality of grooves by adjusting an attribute of the magnetic field.

17. The system of claim 16 , wherein the attribute comprises at least one of a magnetic field strength, a rate of revolution of the magnetic field, or a direction of the magnetic field.

18. The system of claim 12 , wherein the pole tip of the magnetic field generator is configured to rotate with respect to the workpiece and the workpiece holder to cause the magnetic field to rotate.

19. The system of claim 12 , further comprising a robotic arm configured to move the workpiece holder with respect to the magnetic field generator.

Assignees

• Univ Florida
• Univ Of Florida Res Found

Inventors

• Greenslet Hitomi

Classifications

• B24B1/005

  using a magnetic polishing agent · CPC title

• B24B31/112

  using magnetically consolidated grinding powder, moved relatively to the workpiece under the influence of pressure · CPC title

• B24B19/02

  for grinding grooves, e.g. on shafts, in casings, in tubes, homokinetic joint elements · CPC title

• B24B31/102 Primary

  using an alternating magnetic field · CPC title