SYSTEMS AND METHODS FOR CALIBRATING A TOOL

• US 20190310156A1
• Filed: 06/24/2019
• Published: 10/10/2019
• Est. Priority Date: 08/09/2016
• Status: Abandoned Application

• Current Assignee: Hamilton Sundstrand Corporation (Raytheon Technologies Corporation d/b/a RTX)
• Original Assignee: Hamilton Sundstrand Corporation (Raytheon Technologies Corporation d/b/a RTX)
• Inventors: Kleza, Charles R., Davidson, Andrew P., Engel, John B., Coache, David J.
• Application Number:
  US16/450,709
• Publication Number:
  US 20190310156A1
• Time in Patent Office: Days
• CPC Class Codes: B25B 23/1425 by electrical means
• CPC Class Codes: F04D 29/042 Axially shiftable rotors F04D29/041 takes precedence ; control by creating a by-pass F04D15/0027
• CPC Class Codes: G01L 25/003 for measuring torque
• CPC Class Codes: G06F 3/018 Input/output arrangements for oriental characters

Abstract

A calibration system includes a housing, a drive shaft within the housing, a load application apparatus operatively connected to the drive shaft to apply a force to the drive shaft, and a plurality of housing transducers operatively connected to the drive shaft to measure at least one of an in-line torque or a prevailing torque of the drive shaft. A method for calibrating a tool includes generating at least one of a pass or fail output from a processing unit based on whether a variance between a prevailing torque from a tool transducer and a prevailing torque from an external tool is within a predetermined variance threshold. A method for measuring prevailing torque in a tool includes determining whether a prevailing torque value is within a predetermined prevailing torque range and adjusting a shut-off threshold torque based on the prevailing torque.

Claims

1. A calibration system comprising:

a housing;

a drive shaft within the housing extending to a connection point on a wall of the housing;

a load application apparatus operatively connected to the drive shaft to apply a force to the drive shaft; and

a plurality of housing transducers operatively connected to the drive shaft to measure at least one of an in-line torque or a prevailing torque of the drive shaft.

2. The calibration system as recited in claim 1, further comprising a processing unit operatively connected to at least one of the plurality of housing transducers to provide a pass/fail output based on a comparison between the prevailing torque measurement from at least one of the housing transducers and a prevailing torque measurement from an external tool.

3. The calibration system as recited in claim 1, a selectively removable tool operatively connected to the connection point on the wall of the housing to apply a torque to the drive shaft.

4. The calibration system as recited in claim 3, wherein the selectively removable tool includes a tool transducer to determine at least one of an in-line torque and a prevailing torque being applied to the drive shaft by the selectively removable tool.

5. The calibration system as recited in claim 4, wherein the tool transducer is operatively connected to a processing unit operatively connected to at least one of the plurality of housing transducers, wherein the processing unit provides a pass/fail output based on a comparison between the prevailing torque measurement from at least one of the plurality of housing transducers and the prevailing torque measurement from the tool transducer.