Cylindrical grinding process and as-ground part resulting from such process

Patent metadata

Field	Value
Publication number	US-9468977-B2
Application number	US-201414182855-A
Country	US
Kind code	B2
Filing date	Feb 18, 2014
Priority date	Feb 18, 2014
Publication date	Oct 18, 2016
Grant date	Oct 18, 2016

Abstract

A process of grinding a pre-ground part wherein the method includes the steps of: providing a pre-ground part containing a bore, and the pre-ground part having an exterior surface with one or more to-be-ground exterior surface regions; positioning a loading tool within the bore of the pre-ground part; exerting a loading tool load on the loading tool which in turn exerts a part load on the pre-ground part; removing material from the one or more to-be-ground surface regions of the pre-ground part when under the part load to form an as-ground part; and unloading the part load from the as-ground part.

First claim

What is claimed is:

1. A process of grinding a pre-ground part, comprising the steps of:
providing a pre-ground part containing a bore, the pre-ground part having an exterior surface with one or more spaced-apart exterior surface regions;
positioning a loading tool within the bore of the pre-ground part;
exerting a loading tool load on the loading tool which in turn exerts a part load on the pre-ground part;
removing material from the one or more spaced-apart exterior surface regions of the pre-ground part when under the part load, to form an as-ground part; and
unloading the part load from the as-ground part;
wherein the as-ground part comprises a generally circular transverse surface profile when under load; and
wherein the as-ground part comprises a generally elliptical and non-circular transverse surface profile when not under load.

2. The process according to claim 1 wherein the part load is exerted on the pre-ground part in the vicinity of the two spaced-apart exterior surface regions.

3. The process according to claim 1 wherein the pre-ground part contains a radially-oriented threaded aperture opening into the bore, and said process further includes, after the positioning step and before the exerting step:
providing a screw; and
moving the screw through the threaded aperture into contact with the loading tool.

4. The process according to claim 3 wherein the radially-oriented threaded aperture is oriented along a direction that is offset from a transverse axis of the pre-ground part.

5. The process according to claim 1 wherein, prior to said positioning of the loading tool, the one or more spaced-apart exterior surface regions of the provided sleeve comprise a generally circular transverse surface profile.

6. The process according to claim 1 wherein, when the part load is exerted on the pre-ground part, the one or more spaced-apart exterior surface regions develop a generally elliptical and non-circular transverse surface profile.

7. A sleeve produced by the process comprising the steps of:
providing a sleeve containing a sleeve bore and one or more spaced-apart exterior surface regions;
positioning a loading tool within the sleeve bore of the provided sleeve;
exerting a load on the loading tool which, in turn, exerts a sleeve load on the provided sleeve;
removing material from the one or more spaced-apart exterior surface regions of the provided sleeve when under the sleeve load, to form an as-ground sleeve; and
unloading the sleeve load from the as-ground sleeve;
wherein the as-ground sleeve comprises a generally circular transverse surface profile when under load; and
wherein the as-ground sleeve comprises a generally elliptical and non-circular transverse surface profile when not under load.

8. The sleeve according to claim 7 wherein:
the provided sleeve has an axial forward end and an axial rearward end;
one of the spaced-apart exterior surface regions is adjacent to the axial forward end of the provided sleeve; and
another of the spaced-apart exterior surface regions is adjacent to the axial rearward end of the provided sleeve.

9. The sleeve according to claim 7 wherein, when the sleeve load is exerted on the provided sleeve, the one or more spaced-apart exterior surface regions develop a generally elliptical and non-circular transverse surface profile.

10. An as-ground dampening sleeve-tool adapter dampening device assembly comprising:
an as-ground dampening sleeve containing a sleeve bore and having an axial forward end and an axial rearward end, the as-ground dampening sleeve further having an axial forward exterior as-ground sleeve surface and an axial rearward exterior as-ground exterior sleeve surface;
a tool adapter dampening device containing an adapter bore wherein the adapter bore having an axial forward adapter bore end and an axial rearward adapter bore end, the adapter bore being surrounded at the axial forward adapter bore end by a mouth with a side mouth wall, and the adapter bore having a reduced diameter bore surface adjacent the axial rearward adapter bore end;
the as-ground dampening sleeve being positioned within the adapter bore whereby:
the axial forward exterior as-ground sleeve surface is adjacent to the side mouth wall of the mouth, with the axial rearward exterior as-ground sleeve surface being adjacent to the reduced diameter bore surface; and
when a force is exerted on the as-ground dampening sleeve, the axial forward exterior as-ground sleeve surface does not contact the side mouth wall of the mouth and the axial rearward exterior as-ground sleeve surface does not contact the reduced diameter bore surface; and

a locking screw attaching the dampening sleeve to the tool adapter dampening device, and a resilient body being sandwiched between the locking screw and the dampening sleeve.

11. The as-ground dampening sleeve-tool adapter dampening device assembly according to claim 10 wherein the adapter bore has grooves, and the as-ground dampening sleeve has resilient projections wherein each of the resilient projections corresponds with one of the grooves.

12. The as-ground dampening sleeve-tool adapter dampening device assembly according to claim 10 wherein the resilient projections are under a first level of axial compression.

13. The as-ground dampening sleeve-tool adapter dampening device assembly according to claim 12 wherein a spacer is positioned at a first position on the locking screw whereby the resilient projections are under a second level of axial compression, and the second level of axial compression is greater than the first level of axial compression.

14. The as-ground dampening sleeve-tool adapter dampening device assembly according to claim 13 wherein a spacer is positioned at a second position on the locking screw whereby the resilient projections are under a third level of axial compression, and the third level of axial compression is less than the first level of axial compression.

15. The as-ground sleeve according to claim 7 , wherein the provided sleeve comprises a sleeve in a non-ground condition.

16. The as-ground sleeve according to claim 7 , wherein:
a longitudinal axis is defined through the sleeve bore; and
said exerting of a sleeve load comprises exerting a load in a radially outward direction with respect to the longitudinal axis.

17. The as-ground sleeve according to claim 7 wherein:
the provided sleeve includes at least one aperture disposed through the one or more spaced-apart exterior surface regions, wherein the at least one aperture opens into the sleeve bore; and
said process further comprises, subsequent to said positioning step and prior to said exerting step, displacing at least one screw through the at least one aperture and into contact with the loading tool.

18. The as-ground sleeve according to claim 17 wherein the at least one aperture is oriented along a direction that is offset from a radial direction with respect to the longitudinal axis of the sleeve bore.

Assignees

• Kennametal Inc

Inventors

• Mccormick Michael R
• Frota De Souza Filho Ruy

Classifications

• Y10T279/3406

  Adapter · CPC title

• B23B2250/16

  Damping of vibrations · CPC title

• B23B2231/04

  Adapters · CPC title

• Y10T408/9098

  with means to retain Tool to support · CPC title

• B23B31/10 Primary

  characterised by the retaining or gripping devices or their immediate operating means · CPC title