Tooling assembly and method for installation of a frangible fastener

Patent metadata

Field	Value
Publication number	US-11280365-B2
Application number	US-201916676930-A
Country	US
Kind code	B2
Filing date	Nov 7, 2019
Priority date	Oct 19, 2017
Publication date	Mar 22, 2022
Grant date	Mar 22, 2022

Abstract

A tooling assembly for fastener installation has a socket body reversibly rotatable by a driving mechanism. A bore in the socket body has a first end portion and a central portion incorporating threads. A second end portion of the bore receives and engages a severable section of a frangible fastener. A pin is received in the bore and constrained from rotation by the driving mechanism. The pin has an ejection shaft with mating threads selectively receivable in the threads of the central portion of the bore. The socket body is freely rotatable with the mating threads positioned in the first end portion of the bore. Rotation of the socket body in torques the frangible fastener on a stud fracturing the severable section. Reverse rotation of the socket body engages the mating threads in the threads translating the pin. The ejection shaft ejects the severable section from the second end portion.

First claim

What is claimed is:

1. A method for installation of a frangible fastener using a tooling assembly having a socket body and a pin with a driving mechanism, the method comprising steps of:
inserting the frangible fastener in the socket body having a bore with a first end portion and a second end portion, the frangible fastener inserted in the second end portion;
positioning the driving mechanism to engage the frangible fastener with a stud;
resiliently urging the pin in the bore to engage the pin with the stud;
rotating the socket body in a first direction torquing the frangible fastener on the stud;
fracturing a severable section of the frangible fastener;
retaining the severable section of the frangible fastener in a frictional retaining element;
removing the socket body from the stud and positioning the socket body for disposal of the severable section;
engaging the severable section with a shoulder on the pin;
translating the pin to urge the severable section out of contact with the frictional retaining element by rotating the socket body in a second direction and engaging mating threads on the pin with threads in the bore to translate the pin; and
ejecting the severable section from the second end portion.

2. The method as defined in claim 1 , further comprising:
rotating the socket body with the driving mechanism in the first direction to oppositely translate the pin; and
withdrawing the mating threads from the threads.

3. The method as defined in claim 1 , wherein the step of resiliently urging the pin in the bore to engage the pin with the stud further comprises urging the pin in a longitudinal direction to engage a keyed tip of the pin with the stud.

4. The method as defined in claim 1 , further comprising a step of engaging the socket body with the driving mechanism, wherein:
the socket body is reversibly rotatable by the driving mechanism,
the first end portion of the bore extends from a first end of the socket body,
the first end portion of the bore is open at the first end of the socket body,
a central portion of the bore incorporates threads, and
the second end portion of the bore extends to a second end of the socket body.

5. The method as defined in claim 4 , wherein the step of engaging the socket body with the driving mechanism comprises engaging a gear on the socket body with a reversibly rotatable gear train in the driving mechanism.

6. The method as defined in claim 4 , further comprising engaging a head of the pin with a resilient rotation prevention mechanism in the driving mechanism.

7. The method as defined in claim 6 , further comprising steps of:
urging the pin in a longitudinal direction with the resilient rotation prevention mechanism; and
preventing rotation of the pin.

8. The method as defined in claim 7 , wherein the step of preventing rotation of the pin comprises engaging a fork in the resilient rotation prevention mechanism on flats on the head of the pin.

9. The method as defined in claim 7 , wherein the step of resiliently urging the pin in the bore to engage the pin with the stud further comprises engaging a keyed tip of the pin in a bore in the stud.

10. The method as defined in claim 7 , wherein the step of ejecting the severable section from the second end portion comprises rotating the socket body in the second direction and engaging the mating threads on the pin with the threads in the central portion of the bore to translate the pin.

11. The method as defined in claim 10 , further comprising steps of:
engaging the severable section with a shoulder on the pin; and
urging the severable section out of contact with the frictional retaining element.

12. The method as defined in claim 11 , wherein the step of urging the severable section out of contact with the frictional retaining element comprises rotating the mating threads on the pin through a disengagement length of the threads in the central portion of the bore to cause translation of the pin from engagement of the shoulder with the severable section to disengagement of the severable section from the frictional retaining element.

13. The method as defined in claim 12 , further comprising:
rotating the socket body with the driving mechanism in the first direction to oppositely translate the pin; and
withdrawing the mating threads on the pin from the threads in the central portion of the bore.

14. The method as defined in claim 1 , further comprising:
engaging the socket body with the driving mechanism by engaging a gear on the socket body with a reversibly rotatable gear train in the driving mechanism, wherein:
the socket body is reversibly rotatable by the driving mechanism,
the first end portion of the bore extends from a first end of the socket body,
the first end portion of the bore is open at the first end of the socket body,
a central portion of the bore incorporates threads, and
the second end portion extends to a second end of the socket body;

engaging a head of the pin with a resilient rotation prevention mechanism in the driving mechanism, wherein the step of resiliently urging the pin in the bore comprises urging the pin in a longitudinal direction with the resilient rotation prevention mechanism; and
preventing rotation of the pin.

15. The method as defined in claim 14 , wherein the step of ejecting the severable section from the second end portion comprises:
rotating the socket body in a second direction and engaging mating threads on the pin with the threads in the central portion of the bore to translate the pin;
engaging the severable section with a shoulder on the pin; and
urging the severable section out of contact with the frictional retaining element;
rotating the socket body with the driving mechanism in the first direction to oppositely translate the pin; and
withdrawing the mating threads on the pin from the threads in the central portion of the bore.

16. The method as defined in claim 1 , further comprising a step of engaging the socket body with the driving mechanism, wherein:
the socket body is reversibly rotatable by the driving mechanism,
the first end portion of the bore extends from a first end of the socket body,
the first end portion of the bore is open at the first end of the socket body,
a central portion of the bore incorporates threads, and
the second end portion of the bore extends to a second end of the socket body;

wherein the step of engaging the socket body with the driving mechanism comprises engaging a gear on the socket body with a reversibly rotatable gear train in the driving mechanism; and
further comprising engaging a head of the pin with a resilient rotation prevention mechanism in the driving mechanism.

17. The method as defined in claim 16 wherein the step of resiliently urging the pin in the bore to engage the pin with the stud further comprises engaging a keyed tip of the pin in a bore in the stud and further comprising steps of:
urging the pin in a longitudinal direction with the resilient rotation prevention mechanism; and
preventing rotation of the pin by engaging a fork in the resilient rotation prevention mechanism on flats on the head of the pin.

18. The method as defined in claim 17 wherein the step of ejecting the severable section from the second end portion comprises rotating the socket body in the second direction and engaging the mating threads on the pin with the threads in the central portion of the bore to translate the pin, and comprising steps of:
engaging the severable section with a shoulder on the pin; and

Assignees

• Boeing Co

Inventors

• Johnson Joshua R

Classifications

• B25B17/00 Primary

  Hand-driven gear-operated wrenches or screwdrivers (ratchet-operated B25B13/46 {B25B13/467}, B25B15/04; {for mounting or dismounting wheels B60B29/005}) · CPC title

• B25B23/0057

  Socket or nut ejector means · CPC title

• B25B23/1415

  Break members; Arrangements specially adapted for break-bolts (break-bolts per se F16B31/00) · CPC title

• B23P19/06 Primary

  Screw or nut setting or loosening machines · CPC title

• B25B23/0085

  Counterholding devices · CPC title