Dynamic action abrasive lapping workholder

• US 8,430,717 B2
• Filed: 10/12/2010
• Issued: 04/30/2013
• Est. Priority Date: 10/12/2010
• Status: Expired due to Fees

• Current Assignee: Duescher, Wayne O.
• Original Assignee: Duescher, Wayne O.
• Inventors: Duescher, Wayne O.
• Primary Examiner(s): RACHUBA, MAURINA T
• Application Number:
  US12/902,665
• Publication Number:
  US 20120088439A1
• Time in Patent Office: 931 Days
• Field of Search: 451/5, 451/8, 451/11, 451/41, 451285-290
• US Class Current: 451/8
• CPC Class Codes: B24B 37/30 for single side lapping of plane surfaces
• CPC Class Codes: B24B 49/00 Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation B24B33/06, B24B37/005 take precedence; if applicable to other machine tools, B23Q15/00 - B23Q17/00 take precedence

Abstract

A method and apparatus for quickly moving workpieces from having abrading contact with abrasive-surfaced rotatable platens using a dynamic-action workholder apparatus frame moving device that is activated by a sensor. Flat-surfaced workpieces are attached to flat-surfaced workholders to abrade one surface of the workpieces by abrasive coated platens. The force moving device can be a spring, an air cylinder, a screw-jack, an electric solenoid or a piezo-electric device. The sensor can be a vibration, shock, motion, force or sound sensor that can to sense abrading process events that could make it desirable to quickly activate moving of the workpieces away from the abrasive disk. The workpiece abrading event can be quickly interrupted by use of this device to avoid damage to workpieces, the abrasive disks or the platen or to quickly change an abrading process. After the workpieces are moved they can be returned to their original abrading position.

Claims

1. A dynamic action rotatable workholder apparatus that positions workpieces in flat-surfaced single-sided abrading contact with a rotatable abrading platen that is activated by abrading friction contact forces to move the workpieces away from contact with the rotatable abrading platen comprising:

a) an abrading machine frame;

b) a workholder apparatus frame attached to the abrading machine frame by a mechanism that allows the workholder apparatus frame to be moved away from or toward the abrading machine frame;

c) a rotatable workholder plate having a flat-surfaced workpiece attachment surface and having a rotatable workholder plate rotation axis that is perpendicular to and is located at a center of the rotatable workholder plate flat-surfaced workpiece attachment surface where the rotatable workholder plate can be rotated about the rotatable workholder plate rotation axis and wherein the rotatable workholder plate is moveably attached to the workholder apparatus frame;

d) a rotatable abrading platen having an approximately horizontal flat annular abrading-surface and having a rotatable abrading platen rotation axis that is perpendicular to and is located at a center of the rotatable abrading platen approximately-horizontal flat annular abrading-surface where the rotatable abrading platen can be rotated about the rotatable abrading platen rotation axis and where the rotatable abrading platen is moveably attached to the abrading machine frame;

e) wherein the rotatable abrading platen approximately horizontal flat annular abrading-surface has an abrasive layer provided by an abrasive device selected from the group consisting of flexible abrasive disks, flexible raised-island abrasive disks, flexible abrasive disks with resilient backing layers, flexible abrasive disks with resilient backing layers having a vacuum-seal polymer backing layer, flexible abrasive disks having attached solid abrasive pellets, flexible chemical mechanical planarization resilient disk pads with liquid abrasive slurries, flexible chemical mechanical planarization resilient disk pads having nap covers, flexible shallow-island chemical mechanical planarization abrasive disks, flexible shallow-island abrasive disks with resilient backing layers having a vacuum-seal polymer backing layer, flexible flat-surfaced metal or polymer disks, and liquid abrasive-slurry layers;

f) workpieces having parallel opposed workpiece flat top surfaces and workpiece flat bottom surfaces, wherein the workpieces'"'"' flat top surfaces are attached to the rotatable workholder plate flat-surfaced workpiece attachment surface;

g) wherein the workholder apparatus frame can be positioned at a location on the abrading machine frame where workpieces attached to the rotatable workholder plate flat-surfaced workpiece attachment surface are in flat-surfaced abradable contact with the rotatable abrading platen annular abrading-surface abrasive coating;

h) an abrading friction force-activated locking mechanism that is attached to the workholder apparatus frame wherein the abrading friction force activated locking mechanism can be engaged to hold the workholder apparatus frame at a location on the abrading machine frame or where the abrading friction force activated locking mechanism can be disengaged to allow the workholder apparatus frame to be moved away from a location on the abrading machine frame;

i) wherein a motion-inducing force device is attached to the workholder apparatus frame where the motion inducing force device can apply an acceleration force to the workholder apparatus frame to move the workholder apparatus frame away from the location on the abrading machine frame wherein workpieces attached to the rotatable workholder plate are moved away from contact with the rotatable abrading platen;

j) where the engaged workholder apparatus abrading friction force activated locking mechanism can act against a motion inducing force device acceleration force to hold the workholder apparatus frame at a location on the abrading machine frame;

k) wherein controlled workpiece abrading forces can be applied to workpieces attached to the rotatable workholder plate when the workholder apparatus frame is positioned at a location on the abrading machine frame where the flat bottom surfaces of workpieces attached to the rotatable workholder plate are in flat-surfaced abradable contact with the rotatable abrading platen annular abrading-surface abrasive layer wherein the controlled workpiece abrading forces urge the flat bottom surfaces of the workpieces against the rotatable abrading platen annular abrading-surface abrasive layer;

l) wherein an abrading friction force activated locking mechanism activation device can be activated to disengage the abrading friction force activated locking mechanism by abrading friction contact forces that are imposed upon workpieces attached to the rotatable workholder plate by the rotating abrading platen abrasive layer that is in abrading contact with the attached workpieces and therein imposed upon the abrading friction force activated locking mechanism activation device that is coupled to the rotatable workholder plate;

m) wherein the abrading friction force activated locking mechanism activation device has an adjustable force set-point where the abrading friction force activated locking mechanism activation device can be activated by abrading friction contact forces applied to the abrading friction force activated locking mechanism activation device that exceed the abrading friction force activated locking mechanism activation device adjusted force set-point wherein the abrading friction force activated locking mechanism is disengaged;

n) wherein workpieces can be attached to the rotatable workholder plate wherein the workholder apparatus frame can be positioned at a location on the abrading machine frame wherein the

abrading friction force activated locking mechanism can be engaged to hold the workholder apparatus frame at the location on the abrading machine frame and wherein a motion inducing force device is attached to the workholder apparatus frame where the motion inducing force device applies an acceleration force to the workholder apparatus frame wherein attached workpieces'"'"' flat bottom surfaces are in flat-surfaced abradable contact with the rotatable abrading platen annular abrading-surface abrasive layer wherein controlled workpiece abrading forces can be applied to the attached workpieces to urge the attached workpieces'"'"' flat bottom surfaces against the rotatable abrading platen annular abrading-surface abrasive layer wherein the workpieces attached to the rotatable workholder plate can be rotated about the rotatable workholder plate rotational axis and wherein the rotatable abrading platen can be rotated about the rotatable abrading platen rotation axis to single-side abrade the attached workpieces'"'"' bottom surfaces;

o) wherein abrading friction contact forces can be imposed upon the attached workpieces and therein imposed upon the abrading friction force activated locking mechanism by the rotating abrading platen abrasive layer in abrading contact with the attached workpieces;

p) wherein the abrading friction force activated locking mechanism can be activated when the abrading friction contact forces exceed the abrading friction force activated locking mechanism activation device adjustable set-point to disengage the abrading friction force activated locking mechanism wherein the workholder apparatus frame is moved by the motion inducing force device acceleration force away from the location on the abrading machine frame wherein the attached workpieces are moved away from contact with the rotatable abrading platen approximately horizontal annular abrading-surface.

2. The apparatus of claim 1 where multiple dynamic action rotatable workholder apparatus are used on an abrading platen.

3. The apparatus of claim 1 where the workholder apparatus frame motion inducing force device has an adjustable acceleration force and where the workholder apparatus frame motion inducing force device is selected from the group consisting of:

a spring, an air cylinder;

hydraulic cylinder, a motor driven screw-jack, an electric solenoid; and

a piezo-electric device.

4. A process of using a dynamic action rotatable workholder apparatus that positions workpieces in flat-surfaced single-sided abrading contact with a rotatable abrading platen and that is activated by abrading friction contact forces to move the workpieces away from contact with the rotatable abrading platen comprising:

a) providing an abrading machine frame;

b) moving a workholder apparatus frame attached to the abrading machine frame by a mechanism to move the workholder apparatus away from or toward the abrading machine frame;

c) providing a rotatable workholder plate having a flat-surfaced workpiece attachment surface and having a rotatable workholder plate rotation axis that is perpendicular to and is located at the center of the rotatable workholder plate flat-surfaced workpiece attachment surface and rotating the rotatable workholder plate about the rotatable workholder plate rotation axis and wherein the rotatable workholder plate is attached to the workholder apparatus frame;

d) providing a rotatable abrading platen having an approximately-horizontal flat annular abrading-surface and having a rotatable abrading platen rotation axis that is perpendicular to and is located at a center of the rotatable abrading platen approximately-horizontal flat annular abrading-surface and rotating the rotatable abrading platen about the rotatable abrading platen rotation axis and where the rotatable abrading platen is attached to the abrading machine frame;

e) providing that the rotatable abrading platen approximately horizontal flat annular abrading-surface has an abrasive layer provided by an abrasive device selected from the group consisting of flexible abrasive disks, flexible raised-island abrasive disks, flexible abrasive disks with resilient backing layers, flexible abrasive disks with resilient backing layers having a vacuum-seal polymer backing layer, flexible abrasive disks having attached solid abrasive pellets, flexible chemical mechanical planarization resilient disk pads with liquid abrasive slurries, flexible chemical mechanical planarization resilient disk pads having nap covers, flexible shallow-island chemical mechanical planarization abrasive disks, flexible shallow-island abrasive disks with resilient backing layers having a vacuum-seal polymer backing layer, flexible flat-surfaced metal or polymer disks, and liquid abrasive-slurry layers;

f) attaching workpieces having parallel opposed workpiece flat top surfaces and workpiece flat bottom surfaces to the rotatable workholder plate wherein the workpieces'"'"' flat top surfaces are attached to the rotatable workholder plate flat-surfaced workpiece attachment surface;

g) positioning the workholder apparatus frame at a first location on the abrading machine frame where workpieces attached to the rotatable workholder plate flat-surfaced workpiece attachment surface are in flat-surfaced abradable contact with the rotatable abrading platen annular abrading-surface abrasive layer;

h) attaching an abrading friction force activated locking mechanism to the workholder apparatus frame wherein the abrading friction force activated locking mechanism can be engaged to hold the workholder apparatus frame at the first location on the abrading machine frame or where the abrading friction force activated locking mechanism is disengaged to allow the workholder apparatus frame to move away from the first elected location on the abrading machine frame;

i) activating the abrading friction force activated locking mechanism to engage the workholder apparatus frame wherein the workholder apparatus frame is held at the first location on the abrading machine frame;

j) attaching a motion inducing force device to the workholder apparatus frame where the motion inducing force device applies an acceleration force to the workholder apparatus frame where the acceleration force moves the workholder apparatus frame away from the first location on the abrading machine frame when the abrading friction force activated locking mechanism is disengaged wherein workpieces attached to the rotatable workholder plate are moved away from contact with the rotatable abrading platen;

k) providing that the engaged abrading friction force activated locking mechanism acts against the motion inducing force device acceleration force to hold the workholder apparatus frame at the first location on the abrading machine frame;

l) applying controlled workpiece abrading forces to the workpieces attached to the rotatable workholder plate when the workholder apparatus frame is positioned at the first location on the abrading machine frame where the flat bottom surfaces of the workpieces attached to the rotatable workholder plate are in flat-surfaced abradable contact with the rotatable abrading platen annular abrading-surface abrasive layer wherein the controlled workpiece abrading forces urge the flat bottom surfaces of the workpieces against the rotatable abrading platen annular abrading-surface abrasive layer;

m) activating an abrading friction force activated locking mechanism activation device to disengage the abrading friction force activated locking mechanism by abrading friction contact forces that are imposed upon the workpieces attached to the rotatable workholder plate by the rotating abrading platen abrasive layer that is in abrading contact with the attached workpieces and therein imposed upon the abrading friction force activated locking mechanism activation device that is coupled to the rotatable workholder plate;

n) providing the abrading friction force activated locking mechanism activation device with an adjustable force set-point where the abrading friction force activated locking mechanism activation device is activated by abrading friction contact forces applied to the abrading friction force activated locking mechanism activation device that exceed the abrading friction force activated locking mechanism activation device adjusted force set-point wherein the abrading friction force activated locking mechanism is disengaged;

o) rotating the workpieces attached to the rotatable workholder plate about the rotatable workholder plate rotational axis and rotating the rotatable abrading platen about the rotatable abrading platen rotation axis to single-side abrade the attached workpieces'"'"' bottom surfaces;

p) imposing abrading friction contact forces upon the attached workpieces and therein imposed upon the abrading friction force activated locking mechanism activation device by the rotating abrading platen abrasive layer that is in abrading contact with the attached workpieces;

q) activating the abrading friction force activated locking mechanism when the abrading friction contact forces exceed the abrading friction force activated locking mechanism activation device adjustable set-point to disengage the abrading friction force activated locking mechanism wherein the workholder apparatus frame is moved by the motion inducing force device acceleration force away from the selected location on the abrading machine frame wherein the attached workpieces are moved away from contact with the rotatable abrading platen approximately horizontal annular abrading-surface;

r) activating the abrading friction force activated locking mechanism activation device to disengage the abrading friction force activated locking mechanism by abrading friction contact forces that are imposed upon the workpieces attached to the rotatable workholder plate and therein imposed upon the abrading friction force activated locking mechanism activation device that is coupled to the rotatable workholder plate when the abrading friction contact forces exceed the abrading friction force activated locking mechanism activation device adjustable set-point wherein the abrading friction force activated locking mechanism is disengaged and the workholder apparatus frame is moved by the motion inducing force device acceleration force away from the first location on the abrading machine frame wherein the attached workpieces are moved away from contact with the rotatable abrading platen approximately horizontal annular abrading-surface.

5. The process of claim 4 where multiple dynamic action rotatable workholder apparatus are simultaneously used on an abrading platen.

6. The process of claim 4 where the workholder apparatus frame motion inducing force device has an adjustable acceleration force and where the workholder apparatus frame motion inducing force device is selected from the group consisting of:

a spring, an air cylinder;

hydraulic cylinder, a motor driven screw-jack, an electric solenoid; and

a piezo-electric device.

7. The process of claim 4 where the abrading friction force activated locking mechanism is engaged or disengaged by an abrading friction force activated locking mechanism engagement device activated by event-sensor devices selected from the group consisting of a vibration sensor, shock sensor, motion sensor, force sensor, abrading friction force sensor and sound sensors, or the abrading friction force activated locking mechanism is engaged or disengaged by an abrading friction force activated locking mechanism engagement device activated by a processor wherein the abrading friction force activated locking mechanism event-sensor devices are attached to either the workholder apparatus frame or to the abrading machine frame.

8. The process of claim 5 where an abrading friction force activated locking mechanism is engaged or disengaged by an abrading friction force activated locking mechanism engagement device activated by event-sensor devices selected from the group consisting of a vibration sensor, shock sensor, motion sensor, force sensor, abrading friction force sensor and sound sensor or wherein the abrading friction force activated locking mechanism is engaged or disengaged by an abrading friction force activated locking mechanism engagement device activated by a processor wherein the abrading friction force activated locking mechanism event-sensor devices are attached to either the workholder apparatus frame or to the abrading machine frame wherein selected dynamic action rotatable workholder apparatus workholder apparatus frames'"'"' abrading friction force activated locking mechanisms are activated to move the respective workholder apparatus frames away from the respective workholder apparatus first locations on the abrading machine frame wherein the workpieces attached to the respective rotatable workholder plates are moved away from contact with the rotatable abrading platen or wherein the workpieces attached to the respective rotatable workholder plates are moved away from contact with the rotatable abrading platen annular abrading-surface abrasive layer.

9. A dynamic action rotatable workholder apparatus that positions workpieces in flat-surfaced single-sided abrading contact with a rotatable abrading platen and that is activated to move the workpieces away from contact with the rotatable abrading platen comprising:

a) an abrading machine frame;

b) a workholder apparatus frame attached to the abrading machine frame by a mechanism that allows the workholder apparatus frame to be moved away from or toward the abrading machine frame;

c) a rotatable workholder plate having a flat-surfaced workpiece attachment surface and having a rotatable workholder plate rotation axis that is perpendicular to and is located at a center of the rotatable workholder plate flat-surfaced workpiece attachment surface where the rotatable workholder plate can be rotated about the rotatable workholder plate rotation axis and wherein the rotatable workholder plate is attached to the workholder apparatus frame;

d) a rotatable abrading platen having an approximately-horizontal flat annular abrading-surface and having a rotatable abrading platen rotation axis that is perpendicular to and is located at a center of the rotatable abrading platen approximately-horizontal flat annular abrading-surface where the rotatable abrading platen can be rotated about the rotatable abrading platen rotation axis and where the rotatable abrading platen is attached to the abrading machine frame;

e) wherein the rotatable abrading platen approximately horizontal flat annular abrading-surface has an abrasive layer;

f) workpieces having parallel opposed workpiece flat top surfaces and workpiece flat bottom surfaces are attached to the rotatable workholder plate wherein the workpieces'"'"' flat top surfaces are attached to the rotatable workholder plate flat-surfaced workpiece attachment surface;

g) wherein the workholder apparatus frame can be positioned at a first location on the abrading machine frame where workpieces attached to the rotatable workholder plate flat-surfaced workpiece attachment surface are in flat-surfaced abradable contact with the rotatable abrading platen annular abrading-surface abrasive layer;

h) a workholder apparatus frame locking mechanism attached to the workholder apparatus frame wherein the workholder apparatus frame locking mechanism can be engaged to hold the workholder apparatus frame at the first location on the abrading machine frame or where a workholder apparatus frame locking mechanism can be disengaged to allow the workholder apparatus frame to be moved away from a selected location on the abrading machine frame;

i) wherein a motion inducing force device is attached to the workholder apparatus frame where the motion inducing force device can apply an acceleration force to the workholder apparatus frame to move the workholder apparatus frame away from the first location on the abrading machine frame wherein workpieces attached to the rotatable workholder plate are moved away from contact with the rotatable abrading platen;

j) wherein the engaged workholder apparatus frame locking mechanism can act against the motion inducing force device acceleration force to hold the workholder apparatus frame at the first location on the abrading machine frame;

k) wherein controlled workpiece abrading forces can be applied to workpieces attached to the rotatable workholder plate when the workholder apparatus frame is positioned at the first location on the abrading machine frame where the workpieces attached to the rotatable workholder plate flat bottom surfaces are in flat-surfaced abradable contact with the rotatable abrading platen annular abrading-surface abrasive coating wherein the controlled workpiece abrading forces urge the attached workpieces'"'"' flat bottom surfaces against the rotatable abrading platen annular abrading-surface abrasive layer;

l) wherein a workholder apparatus frame locking mechanism activation device can be activated to either engage or disengage the workholder apparatus frame locking mechanism;

m) wherein the workholder apparatus frame locking mechanism activation device is activated by an event-sensor device selected from the group consisting of a vibration sensor, shock sensor, motion sensor, force sensor, abrading friction force sensor and sound sensors wherein the workholder apparatus frame locking mechanism activation device event-sensor devices are attached to the workholder apparatus frame;

n) wherein workpieces can be attached to the rotatable workholder plate wherein the workholder apparatus frame can be positioned at a second location on the abrading machine frame wherein the workholder apparatus frame locking mechanism activation device is activated to engage the workholder apparatus frame locking mechanism and wherein a motion inducing force device is attached to the workholder apparatus frame where the motion inducing force device applies an acceleration force to the workholder apparatus frame wherein the attached workpieces'"'"' flat bottom surfaces are in flat-surfaced abradable contact with the rotatable abrading platen annular abrading-surface abrasive layer wherein controlled workpiece abrading forces are applied to the attached workpieces to urge the attached workpieces'"'"' flat bottom surfaces against the rotatable abrading platen annular abrading-surface abrasive layer wherein the workpieces attached to the rotatable workholder plate are rotated about the rotatable workholder plate rotational axis and wherein the rotatable abrading platen is rotated about the rotatable abrading platen rotation axis to single-side abrade the attached workpieces'"'"' bottom surfaces;

o) wherein the workholder apparatus frame locking mechanism activation device can be activated by a workholder apparatus frame locking mechanism activation event-sensor device to disengage the workholder apparatus frame locking mechanism wherein the workholder apparatus frame is accelerated by the motion inducing force device acceleration force away from the workholder apparatus second location on the abrading machine frame wherein the workpieces attached to the rotatable workholder plate are moved away from contact with the rotatable abrading platen.

10. The apparatus of claim 9 where multiple dynamic action rotatable workholder apparatus are simultaneously present on an abrading platen.

11. The apparatus of claim 9 where the workholder apparatus frame motion inducing force device has an adjustable acceleration force and where the workholder apparatus frame motion inducing force device is selected from the group consisting of:

a spring, an air cylinder, hydraulic cylinder, a motor driven screw-jack, an electric solenoid and a piezo-electric device.

12. The apparatus of claim 9 where the workholder apparatus frame locking mechanism activation device is activated by an event-sensor device selected from the group consisting of a vibration sensor, shock sensor, motion sensor, force sensor, abrading friction force sensor and sound sensor wherein the workholder apparatus frame locking mechanism activation device event-sensor devices are attached to the abrading machine frame.

13. The apparatus of claim 9 where the workholder apparatus frame locking mechanism activation device can be activated by a processor to interrupt workpiece abrading action or to move the workholder apparatus frame away from the workholder apparatus second location on the abrading machine frame wherein the workpieces attached to the rotatable workholder plate are moved away from contact with the rotatable abrading platen or wherein the workpieces attached to the rotatable workholder plate are moved away from contact with the rotatable abrading platen annular abrading-surface abrasive layer.

14. The apparatus of claim 10 where a dynamic action rotatable workholder apparatus workholder apparatus frame locking mechanism activation device can be activated wherein selected dynamic action rotatable workholder apparatus workholder apparatus frames'"'"' locking mechanism activation devices are activated to move the respective workholder apparatus frames away from the respective workholder apparatus second locations on the abrading machine frame wherein the workpieces attached to the respective rotatable workholder plates are moved away from contact with the rotatable abrading platen or wherein the workpieces attached to the respective rotatable workholder plates are moved away from contact with the rotatable abrading platen annular abrading-surface abrasive layer.

15. A process of using a dynamic action rotatable workholder apparatus that positions workpieces in flat-surfaced single-sided abrading contact with a rotatable abrading platen and that is activated to move the workpieces away from contact with the rotatable abrading platen comprising:

a) providing an abrading machine frame;

b) providing a workholder apparatus frame attached to the abrading machine frame by a mechanism that allows the workholder apparatus frame to be moved away from or toward the abrading machine frame;

c) providing a rotatable workholder plate having a flat-surfaced workpiece attachment surface and having a rotatable workholder plate rotation axis that is perpendicular to and is located at a center of the rotatable workholder plate flat-surfaced workpiece attachment surface where the rotatable workholder plate is rotated about the rotatable workholder plate rotation axis and wherein the rotatable workholder plate is attached to the workholder apparatus frame;

d) providing a rotatable abrading platen having an approximately-horizontal flat annular abrading-surface and having a rotatable abrading platen rotation axis that is perpendicular to and is located at a center of the rotatable abrading platen approximately-horizontal flat annular abrading-surface where the rotatable abrading platen is rotated about the rotatable abrading platen rotation axis and where the rotatable abrading platen is attached to the abrading machine frame;

e) providing the rotatable abrading platen approximately horizontal flat annular abrading-surface with an abrasive layer selected from the group consisting of flexible abrasive disks, flexible raised-island abrasive disks, flexible abrasive disks with resilient backing layers, flexible abrasive disks with resilient backing layers having a vacuum-seal polymer backing layer, flexible abrasive disks having attached solid abrasive pellets, flexible chemical mechanical planarization resilient disk pads with liquid abrasive slurries, flexible chemical mechanical planarization resilient disk pads having nap covers, flexible shallow-island chemical mechanical planarization abrasive disks, flexible shallow-island abrasive disks with resilient backing layers having a vacuum-seal polymer backing layer, flexible flat-surfaced metal or polymer disks, and liquid abrasive-slurry layers;

f) attaching workpieces having parallel opposed workpiece flat top surfaces and workpiece flat bottom surfaces to the rotatable workholder plate wherein the workpieces'"'"' flat top surfaces are attached to the rotatable workholder plate flat-surfaced workpiece attachment surface;

g) positioning the workholder apparatus frame at a selected location on the abrading machine frame where workpieces attached to the rotatable workholder plate flat-surfaced workpiece attachment surface are in flat-surfaced abradable contact with the rotatable abrading platen annular abrading-surface abrasive layer;

h) providing a workholder apparatus frame locking mechanism that is attached to the workholder apparatus frame and engaging the workholder apparatus frame locking mechanism to hold the workholder apparatus frame at a first location on the abrading machine frame or where the workholder apparatus frame locking mechanism is disengaged to allow the workholder apparatus frame to be moved away from the first location on the abrading machine frame;

i) activating a workholder apparatus frame locking mechanism activation device to either engage or disengage the workholder apparatus frame locking mechanism;

j) activating that the workholder apparatus frame locking mechanism activation device by an event-sensor device selected from the group consisting of a vibration sensor, shock sensor, motion sensor, force sensor, abrading friction force sensor and sound sensor wherein the workholder apparatus frame locking mechanism activation device event-sensor devices are attached to the workholder apparatus frame;

k) disengaging an engaged workholder apparatus frame locking mechanism to allow the workholder apparatus frame to be moved away from the first location on the abrading machine frame;

l) activating the workholder apparatus frame locking device mechanism activation device to engage the workholder apparatus frame locking device mechanism wherein the workholder apparatus frame is held at a second location on the abrading machine frame;

l) applying an acceleration force to the workholder apparatus with a motion inducing force device wherein the motion inducing force device applies an acceleration force to the workholder apparatus frame to move the workholder apparatus frame away from the second location on the abrading machine frame wherein workpieces attached to the rotatable workholder plate are moved away from contact with the rotatable abrading plate when the workholder apparatus frame locking device mechanism activation device is disengaged;

m) applying controlled workpiece abrading forces to the workpieces attached to the rotatable workholder plate when the workholder apparatus frame is positioned at a third location on the abrading machine frame where the workpieces attached to the rotatable workholder plate flat-surfaced workpiece attachment surface are in flat-surfaced abradable contact with the rotatable abrading platen annular abrading-surface abrasive layer wherein the controlled workpiece abrading forces urge the attached workpieces'"'"' flat bottom surfaces against the rotatable abrading platen annular abrading-surface abrasive layer;

n) rotating the workpieces attached to the rotatable workholder plate about the rotatable workholder plate rotational axis and rotating the rotatable abrading platen about the rotatable abrading platen rotation axis to single-side abrade the attached workpieces'"'"' bottom surfaces;

o) wherein the workholder apparatus frame locking mechanism activation device is activated by a workholder apparatus frame locking mechanism activation event-sensor device to disengage the workholder apparatus frame locking mechanism wherein the workholder apparatus frame is accelerated by the motion inducing force device acceleration force away from the workholder apparatus frame third location on the abrading machine frame wherein the attached workpieces are moved away from contact with the rotatable abrading platen approximately horizontal annular abrading-surface.

16. The process of claim 15 where multiple dynamic action rotatable workholder apparatus are simultaneously abraded on an abrading platen.

17. The process of claim 15 where the workholder apparatus frame motion inducing force device has an adjustable acceleration force and where the workholder apparatus frame motion inducing force device is selected from the group consisting of:

a spring, an air cylinder, hydraulic cylinder, a motor driven screw-jack, an electric solenoid and a piezo-electric device.

18. The process of claim 15 where the workholder apparatus frame locking mechanism activation device is activated by event-sensor devices selected from the group consisting of vibration sensors, shock sensors, motion sensors, force sensors, abrading friction force sensors and sound event-sensor devices wherein the workholder apparatus frame locking mechanism activation device event-sensor devices are attached to the abrading machine frame.

19. The process of claim 15 where the workholder apparatus frame locking mechanism activation device is activated by a processor to interrupt workpiece abrading action or to move the workholder apparatus frame away from the workholder apparatus third location on the abrading machine frame wherein the workpieces attached to the rotatable workholder plate are moved away from contact with the rotatable abrading platen or wherein the workpieces attached to the rotatable workholder plate are moved away from contact with the rotatable abrading platen annular abrading-surface abrasive layer.

20. The process of claim 16 where a dynamic action rotatable workholder apparatus workholder apparatus frame locking mechanism activation device is activated and wherein selected dynamic action rotatable workholder apparatus workholder apparatus frames'"'"' locking mechanism activation devices are activated to move the respective workholder apparatus frames away from the respective workholder apparatus locations on the abrading machine frame wherein the workpieces attached to the respective rotatable workholder plates are moved away from contact with the rotatable abrading platen or wherein the workpieces attached to the respective rotatable workholder plates are moved away from contact with the rotatable abrading platen annular abrading-surface abrasive layer.