公开(公告)号：US20240123584A1

公开(公告)日：2024-04-18

申请号：US18544198

申请日：2023-12-18

Applicant: UNIVERSITY OF SOUTH FLORIDA

Inventor： Daniel P. Hess

IPC: B25B23/147 ,  G01L5/24

CPC classification number: B25B23/147 ,  G01L5/24

Abstract: A method for achieving a target joint preload can include applying a tightening torque to the second fastener element and measuring that torque as a trial tightening torque. The method can further include applying a loosening torque to the second fastener element and measuring that torque as a trial removal torque. Additionally, the method can include calculating a required tightening torque that is required to be applied to the second fastener element to achieve the target joint preload using only the thread pitch, the trial tightening torque, the trial removal torque, and the target joint preload.

公开(公告)号：US11858096B1

公开(公告)日：2024-01-02

申请号：US16911599

申请日：2020-06-25

Applicant: UNIVERSITY OF SOUTH FLORIDA

Inventor： Daniel P. Hess

IPC: G01L5/24 ,  B25B23/147

CPC classification number: B25B23/147 ,  G01L5/24

Abstract: A method for achieving a target joint preload includes identifying a thread pitch of a first fastener element used to secure two components together. The first fastener element is passed through the two components and a second fastener element is threaded onto the first fastener element. A tightening torque is applied to the second fastener element, which is measured as the trial tightening torque. A loosening torque is applied to the second fastener element, which is measured as the trial removal torque. A required tightening torque that is required to be applied to the second fastener element to achieve the target joint preload is calculated using only the thread pitch, the trial tightening torque, the trial removal torque, and the target joint preload.