Granted Patent B2

US 8,033,002 · App. 12/026,905 · Granted Oct 11, 2011

Assignee: GM Global Technology Operations LLC

Abstract

Claims (65)

1. A method for configuring an end-of-arm tool attachable to an articulable robotic arm, comprising:

slidably engaging an adjustable modular unit including a swing arm, an extendable cylinder, and a workpiece interface tool to a rail element of the end-of-arm tool;

defining an x-axis relative to the rail element and defining an x-y plane relative to the swing arm and defining a z-axis orthogonal to the x-y plane;

machine-sliding the adjustable modular unit in the rail element to a preferred x-axis position;

machine-pivoting the swing arm to a preferred angular orientation determined based upon a preferred y-axis position and the preferred x-axis position;

machine-extending the extendable cylinder along a longitudinal axis to a preferred z-axis position; and

machine-rotating the workpiece interface tool to a preferred rotational angle about the z-axis.

2. The method of claim 1 , comprising:

engaging an external end-effector to a first machine interface comprising a machine-engageable bolt and dowel hole of the adjustable modular unit;

loosening the machine-engageable bolt with the external end-effector;

sliding the machine-engageable bolt in the rail element to the preferred x-axis position;

pivoting the dowel hole around the machine-engageable bolt with the drive pin to the preferred angular orientation; and

tightening the machine-engageable bolt with the external end-effector.

3. The method of claim 2 , wherein sliding the machine-engageable bolt in the rail element comprises moving the articulable robotic arm relative to the external end-effector engaged to the first machine interface.

4. The method of claim 1 , comprising:

engaging a motorized nut runner and a drive pin of an external end-effector to a first machine interface comprising a machine-engageable bolt and dowel hole of the adjustable modular unit;

loosening the machine-engageable bolt with the motorized nut runner;

sliding the machine-engageable bolt in the rail element and pivoting the dowel hole around the machine-engageable bolt with the drive pin to the preferred angular orientation to achieve the preferred y-axis position and the preferred x-axis position; and

tightening the machine-engageable bolt with the external end-effector.

5. The method of claim 1 , comprising:

engaging a motorized nut runner and a drive pin of an external end-effector to a second machine interface comprising a machine-engageable bolt and a locating dowel hole of a rotator set attached to an end of the extendable cylinder distal to the swing arm;

spinning the machine-engageable bolt of the rotator set to rotate a piston of the extendable cylinder to a first position; and

longitudinally extending the piston to the preferred z-axis position.

6. The method of claim 5 , further comprising spinning the machine-engageable bolt of the rotator set to rotate the piston away from the first position to lock the piston in the preferred z-axis position.

7. The method of claim 5 , further comprising

spinning the machine-engageable bolt of the rotator set to rotate the piston to the first position comprising a rotational angle where at fluidic channels within the cylinder are opened; and

permitting flow of hydraulic fluid between an upper piston chamber and a lower piston chamber of the cylinder in the first position.

8. The method of claim 1 , wherein machine-rotating the workpiece

interface tool to the preferred rotational angle about the z-axis comprises

engaging a motorized nut runner and a drive pin of an external end-effector to a second machine interface comprising a machine-engageable bolt and a locating dowel hole of a rotator set attached to an end of the cylinder distal to the swing arm; and

spinning the machine-engageable bolt of the rotator set to rotate the rotator set to the preferred rotational angle.

9. The method of claim 1 , further comprising: machine-swiveling the workpiece interface tool to a preferred swivel angle relative to the longitudinal axis of the cylinder.

10. The method of claim 9 , comprising:

engaging a motorized nut runner and a drive pin of an external end-effector to a third machine interface comprising a driving head of a lockable swivel device and a locating dowel hole of a rotator set attached to an end of the cylinder distal to the swing arm; and

swiveling the workpiece interface tool to the preferred swivel angle relative to the longitudinal axis of the cylinder.

11. The method of claim 9 , comprising machine-swiveling the workpiece interface tool to the preferred swivel angle relative to the longitudinal axis of the cylinder prior to the machine-extending the cylinder along the longitudinal axis of the cylinder and the machine-rotating the workpiece interface tool to the preferred rotational angle.

12. The method of claim 1 , comprising:

engaging an external end-effector to a first machine interface comprising a machine-engageable bolt of the adjustable modular assembly and a dowel hole of the swing arm; and

sliding the swing arm along the rail element to the preferred x-axis position and pivoting the swing arm around the machine-engageable bolt to the angular orientation determined based upon the preferred y-axis position and the preferred x-axis position.

13. The method of claim 12 , further comprising:

engaging the external end-effector to a third machine interface comprising a driving head of a lockable swivel device and a locating dowel hole of a rotator set attached to an end of the cylinder distal to the swing arm; and

swiveling the workpiece interface tool to a preferred swivel angle relative to the longitudinal axis of the cylinder.

14. The method of claim 13 , further comprising:

engaging the external end-effector to a second machine interface attached to an end of the cylinder; and

longitudinally extending the cylinder to the preferred z-axis position.

15. The method of claim 14 , further comprising rotating the rotator set to the preferred rotational angle about the z-axis.

16. A method for configuring a workpiece interface tool for a robotic arm, comprising:

slidably engaging an adjustable modular unit including a swing arm, an extendable shaft, and the workpiece interface tool to a rail element of an end-of-arm device attached to the robotic arm;

machine-sliding the adjustable modular unit in the rail element and machine- pivoting the swing arm to a preferred position and a preferred angular orientation;

machine-swiveling the workpiece interface tool to a preferred swivel angle;

machine-extending the extendable shaft along a longitudinal axis of the cylinder to a preferred position; and

machine-rotating the workpiece interface tool to a preferred rotational angle.

17. The method of claim 16 , wherein machine-sliding the adjustable modular unit in the rail element comprises moving the robotic arm relative to an external end-effector engaged to a machine interface of the adjustable modular unit.

18. A method for configuring a workpiece interface tool for a robotic arm, comprising:

constructing an end-of-arm tooling device including a rail element defining an x-axis orientation, a swing arm projecting in a y-axis orientation and having a first end slidably attached to the rail element and pivotable in an x-y plane, an extendable shaft fixedly attached to a second end of the swing arm and having a longitudinal axis projecting in a z-axis orientation and extendable longitudinally, an adjustable rotator set attached to the extendable shaft and rotatable around the longitudinal axis, a first machine interface device operably attached to the swing arm, and a second machine interface device operably attached to the adjustable rotator set;

attaching the workpiece interface tool to the extendable shaft;

engaging an external end-effector device to the first machine interface;

sliding and pivoting the swing arm to a preferred x-axis position and an angular orientation in the x-y plane;

engaging the external end-effector device to the second machine interface; and

rotating and extending the adjustable rotator set and the extendable shaft to a preferred z-axis position and a preferred rotational angle oriented about the z-axis.

19. The method of claim 18 , further comprising

constructing an adjustable swivel device between the workpiece interface tool and the extendable shaft and a third machine interface device operably attached to the adjustable swivel device;

engaging the external end-effector device to the third machine interface; and

swiveling the adjustable swivel device to a preferred swivel angle.

20. The method of claim 18 , wherein sliding the swing arm to the preferred x-axis position comprises moving the robotic arm relative to the external end-effector engaged to the first machine interface.

Assignments (12)

Continuity (1)