Method and system for removing material from a workpiece

Patent metadata

Field	Value
Publication number	US-11298791-B2
Application number	US-201615278423-A
Country	US
Kind code	B2
Filing date	Sep 28, 2016
Priority date	Sep 28, 2015
Publication date	Apr 12, 2022
Grant date	Apr 12, 2022

Abstract

A method of removing material from a workpiece includes moving a coated abrasive over a receiving surface of a platen, the receiving surface having at least one opening configured for the flow of an ejection material therethrough, moving the platen and workpiece relative to each other to contact the coated abrasive to the workpiece and removing material from the workpiece, and controlling a flow pressure for the ejection material through the at least one opening during removing material from the workpiece, where the flow pressure of the ejection material can be adjusted based on at least one of the operation parameters such as a translation rate of the coated abrasive over the receiving surface, the weight of the coated abrasive, a material removal rate, a coefficient of friction between the coated abrasive and the platen, or a combination thereof.

First claim

What is claimed is:

1. An article, comprising:
a platen comprising:
a body having a convex receiving surface configured for movement of a coated abrasive thereon;
at least one opening intersecting the convex receiving surface and configured to allow for flow of an ejection material therethrough; and
a coating is disposed over and in direct contract with the convex receiving surface of the platen, and wherein the coating comprises a Shore A hardness of not greater than 100A;

wherein the body comprises a thickness defined as a distance between a bottom surface of the body and the convex receiving surface of the body as viewed from a lateral cross-sectional plane of the body, and wherein the body comprises a first uniform thickness extending from a first distal end of the body and a second uniform thickness extending from a second opposing distal end of the body, such that the thickness varies along a longitudinal cross-sectional plane of the body over which the coated abrasive moves.

2. The article of claim 1 , wherein the coating comprises an opening corresponding with the at least one opening on the convex receiving surface of the platen.

3. The article of claim 1 , wherein the platen comprises at least three openings, wherein the coating comprises at least three openings corresponding with the at least three openings on the convex receiving surface of the platen, and wherein the at least three openings are positioned in a straight line or a triangular orientation with respect to each other.

4. The article of claim 1 , wherein the coating comprises a plurality of layers including a first layer overlying and in direct contact with the convex receiving surface and a second layer overlying and in direct contact with the first layer.

5. The article of claim 4 , wherein the first layer comprises a material selected from the group consisting of an elastic polymer, felt, cork, and rubber.

6. The article of claim 4 , wherein the second layer comprises a material selected from the group consisting of graphite or polytetrafluoroethylene (PTFE).

7. The article of claim 4 , wherein the second layer comprises a coefficient of friction of less than 0.5.

8. The article of claim 4 , wherein the second layer comprises a thickness of at least 1 mm and not greater than 5 mm.

9. The article of claim 4 , wherein the second layer comprises a thickness that is less than a thickness of the first layer.

10. The article of claim 4 , wherein the second layer is adhered to the first layer via at least one adhesive.

11. The article of claim 4 , wherein the second layer is directly contacting the first layer.

12. The article of claim 4 , wherein the first layer comprises a material having a Shore A hardness of not greater than 100A.

13. An article, comprising:
a platen comprising a body having a convex receiving surface configured for movement of a coated abrasive thereon;
at least two openings intersecting the convex receiving surface and configured to allow for flow of an ejection material therethrough; and
a coating disposed over the convex receiving surface of the platen, wherein the coating comprises a plurality of layers including a first layer overlying and in direct contact with the convex receiving surface and a second layer overlying and in direct contact with the first layer, wherein the first layer comprises a Shore A hardness of not greater than 100A;
wherein the body comprises a thickness defined as distance between a bottom surface of the body and the convex receiving surface of the body as viewed from a lateral cross-sectional plane of the body, and wherein the body comprises a first uniform thickness extending from a first distal end of the body and a second uniform thickness extending from a second opposing distal end of the body, such that the thickness varies along a longitudinal cross-sectional plane of the body over which the coated abrasive moves.

14. The article of claim 13 , further comprising an inlet configured to provide the ejection material to an interior passageway within the body.

15. The article of claim 14 , wherein the interior passageway is disposed within the body of the platen and is fluidly connected to at least one of the openings and the inlet, wherein the inlet is positioned on a side surface of the body.

16. The article of claim 14 , wherein the inlet is positioned on a side surface of a distal end of the platen.

17. The article of claim 1 , wherein the body includes a maximum height defined as the maximum distance between a bottom surface of the body and the convex receiving surface of the body, a minimum height defined as the minimum distance between the bottom surface of the body and the convex receiving surface of the body, and wherein the at least one opening is positioned between the minimum height and the maximum height of the convex receiving surface.

18. A system, comprising:
a translation assembly configured for translation of a coated abrasive;
a platen comprising a body having a receiving surface configured for movement of the coated abrasive thereon;
a plurality of openings intersecting the receiving surface and configured to allow for flow of an ejection material therethrough, wherein the receiving surface comprises a convex contour along a lateral cross-sectional plane of the body; and
a coating disposed over and in direct contact with the receiving surface of the platen, and wherein the coating comprises a Shore A hardness of not greater than 100A;
wherein the body comprises a thickness defined as a distance between a bottom surface of the body and the convex receiving surface of the body as viewed from a lateral cross-sectional plane of the body, and wherein the body comprises a first uniform thickness extending from a first distal end of the body and a second uniform thickness extending from a second opposing distal end of the body, such that the thickness varies along a longitudinal cross-sectional plane of the body over which the coated abrasive moves.

Assignees

• Saint Gobain Abrasives Inc
• Saint Gobain Abrasifs Sa

Inventors

• Hagan John S
• Mcnamee Robert J
• Landes Tony
• RUTKIEWICZ Brian
• Lang William
• Shappell Mike D

Classifications

• B24B19/14 Primary

  for grinding turbine blades, propeller blades or the like (using grinding belts B24B21/16) · CPC title

• B24D11/00

  Constructional features of flexible abrasive materials; Special features in the manufacture of such materials · CPC title

• B24B21/08

  Pressure shoes; {Pressure members, e.g.} backing belts · CPC title

• B24B21/16

  for grinding other surfaces of particular shape (single purpose machines for grinding cams or camshafts B24B19/12) · CPC title

• B24B55/02

  Equipment for cooling the grinding surfaces, e.g. devices for feeding coolant (cooling or lubricating during dressing operation B24B53/095; incorporated in grinding wheels B24D) · CPC title