Manufacturing fixture system and associated process having a rest pad force sensor with closed loop feedback

Patent metadata

Field	Value
Publication number	US-10363646-B2
Application number	US-201615147007-A
Country	US
Kind code	B2
Filing date	May 5, 2016
Priority date	May 5, 2016
Publication date	Jul 30, 2019
Grant date	Jul 30, 2019

Abstract

A manufacturing fixture process, and associated device for practicing the disclosed process, includes supporting a component during manufacturing by at least one rest pad, and sensing and transmitting a force signal exerted on the rest pad by the component during manufacturing by at least one sensor associated with the at least one rest pad. The process further includes clamping the component onto the rest pad by a clamping component configured to rigidly hold the component, receiving and monitoring the force exerted on the rest pad by a force monitoring system configured to receive and monitor the signal indicating the force exerted on the rest pad, as well as determine whether the force exerted on the rest pad is within a predetermined range, exceeds the predetermined range, and/or is below the predetermined range, and outputting the force exerted on the rest pad with an output device.

First claim

We claim:

1. A manufacturing fixture assembly configured to hold a component in a fixed position during manufacturing comprising:
at least one rest pad configured to support, at least in part, the component in the fixed position during the manufacturing;
a sensor associated with the at least one rest pad and configured to sense a force exerted on the at least one rest pad by the component in the fixed position during the manufacturing;
a clamping component configured to rigidly hold the component onto the at least one rest pad in the fixed position during the manufacturing;
a force monitoring system configured to receive a signal from the sensor indicating the force exerted on the at least one rest pad before and during the manufacturing of the component held in the fixed position, wherein the force monitoring system is configured to determine whether the force exerted on the at least one rest pad comprises at least one of the following determinations: the force exerted on the at least one rest pad is within a predetermined range, the force exerted on the at least one rest pad exceeds the predetermined range, and the force exerted on the at least one rest pad is below the predetermined range; and
an output device configured to output the determinations of the force exerted on the at least one rest pad,
wherein the force monitoring system includes a controller configured to:
receive the signal indicating the force exerted on the at least one rest pad,
determine whether the force exerted on the at least one rest pad comprises the following: the force exerted on the at least one rest pad is within the predetermined range, the force exerted on the at least one rest pad exceeds the predetermined range, and the force exerted on the at least one rest pad is below the predetermined range,
control the output device to output the determinations of the force exerted on the at least one rest pad,
determine a remedial action for control of the clamping component when the force exerted on the at least one rest pad is outside the predetermined range, and
control the clamping component based on the determined remedial action so the force exerted on the at least one rest pad is within the predetermined range.

2. The assembly of claim 1 , wherein the at least one rest pad is configured to be supported by the manufacturing fixture assembly; and wherein the at least one rest pad is configured with a raised surface on which to support the component during the manufacturing.

3. The assembly of claim 1 , wherein the sensor comprises a load cell.

4. The assembly of claim 1 , wherein the sensor is arranged inside the at least one rest pad.

5. The assembly of claim 1 , wherein the clamping component comprises at least one of the following: a clamp, a bolt, and a pusher.

6. The assembly of claim 1 , wherein the force monitoring system comprises a strain conditioner configured to condition and display the signal indicating the force exerted on the at least one rest pad; and further wherein the strain conditioner is configured to determine whether the force exerted on the at least one rest pad comprises the following: the force exerted on the at least one rest pad is within the predetermined range, the force exerted on the at least one rest pad exceeds the predetermined range, and the force exerted on the at least one rest pad is below the predetermined range.

7. The assembly of claim 1 , wherein the output device is a display configured to display the force exerted on the at least one rest pad, and further wherein the display is configured to display the force exerted on the at least one rest pad comprising at the following: the force exerted on the at least one rest pad is within the predetermined range, the force exerted on the at least one rest pad exceeds the predetermined range, and the force exerted on the at least one rest pad is below the predetermined range.

8. The assembly of claim 1 , wherein the output device is configured to output the determination of the force exerted on the at least one rest pad to the force monitoring system; and wherein the force monitoring system is configured to monitor, record, and adjust the clamping component to ensure contact forces between the component and the at least one rest pad are maintained at pre-determined thresholds throughout the operation and assembly.

9. The assembly of claim 8 , wherein the clamping component comprises at least one of the following: a hydraulic system, a pneumatic system, and an electromagnetic system.

10. The assembly of claim 1 , wherein the determined remedial action includes automatically stopping the manufacturing of the component in the fixed position.

Assignees

• Caterpillar Inc

Inventors

• Lee Nien
• Murphy Paul
• Vogler Michael

Classifications

• B23Q17/005 Primary

  by measuring a force, a pressure or a deformation · CPC title

• G05B19/00

  Program-control systems · CPC title

• G05B2219/49134

  Clamp, keep positioned slide, workpiece stationary during machining · CPC title

• G05B19/401

  characterised by control arrangements for measuring, e.g. calibration and initialisation, measuring workpiece for machining purposes (G05B19/19 takes precedence) · CPC title