Method for locating machining position in repair material, and repairing method

1. A method for locating a machining position in a repair material that is arranged on a member including a previously machined portion, the method comprising:

a step of arranging a marker including a portion having a different propagation characteristic of an ultrasonic wave from that of a peripheral portion in the previously machined portion before the repair material is arranged on the member, said marker configured to correspond to the size of the previously machined portion;

a step of removing a portion of the member after the marker is arranged in the member;

a step of arranging the repair material on the member; and

a step of applying the ultrasonic wave to the member covered with the repair material to detect the size of the marker and to locate the machining position at a position of the marker captured by the ultrasonic wave after the repair material is arranged on the member.

2. The method for locating a machining position in a repair material according to claim 1 ,

wherein the marker includes air.

3. The method for locating a machining position in a repair material according to claim 2 ,

wherein the previously machined portion is a through-hole that passes through the member or a hole that is formed in the member.

4. The method for locating a machining position in a repair material according to claim 1 ,

wherein the previously machined portion is a through-hole that passes through the member or a hole that is formed in the member.

5. The method for locating a machining position in a repair material according to claim 4 ,

wherein the marker is configured to indicate a machining position of a hole in the repair material which continues to the through-hole that passes through the member or the hole that is formed in the member.

6. The method for locating a machining position in a repair material according to claim 4 ,

wherein an inside of the previously machined portion is entirely filled and sealed by the marker and a seal material before the repair material is arranged on the member.

7. The method for locating a machining position in a repair material according to claim 6 ,

wherein the seal material is a resin material.

8. The method for locating a machining position in a repair material according to claim 4 ,

wherein the marker has an indicating member in a form pointing to an axial center of the marker, or a hollow in a form pointing to the axial center.

9. The method for locating a machining position in a repair material according to claim 1 ,

wherein the repair material has a repair patch formed from a fiber reinforced resin before curing.

10. The method for locating a machining position in a repair material according to claim 1 ,

wherein the member constitutes an aircraft.

11. A repairing method using a repair material that is arranged on a member including a previously machined portion, the method comprising:

a first step of arranging a marker including a portion having a different propagation characteristic of an ultrasonic wave from that of a peripheral portion in the previously machined portion before the repair material is arranged on the member, said marker configured to correspond to the size of the previously machined portion;

a second step of removing a portion of the member;

a third step of joining the repair material to the member;

a fourth step of applying the ultrasonic wave to the member covered with the repair material to detect the size of the marker and to locate a machining position at a position of the marker captured by the ultrasonic wave; and

a fifth step of applying machining to the machining position.

12. The repairing method according to claim 11 ,

wherein the previously machined portion is a through-hole that passes through the member; and the method comprises a sealing step of sealing an inside of the through-hole by a seal material before the repair material is arranged on the member,

in the third step, the repair material is cured by heating while a pressure between the repair material and the member is being reduced, and

in the fifth step, the marker and the seal material are removed by applying machining to the machining position throughout the repair material and the member.

13. The repairing method according to claim 12 ,

wherein in the sealing step, the inside of the through-hole is entirely filled and sealed by the marker and the seal material.

14. The repairing method according to claim 12 ,

wherein the marker is configured to indicate a position where a hole continuing to the through-hole is machined in the repair material.

15. The repairing method according to claim 12 ,

wherein the marker is configured to retain its shape even when the repair material is heated in the third step, and keep a state in which air is included.

16. The repairing method according to claim 12 ,

wherein after the sealing step and prior to the third step, the member provided with the seal material is mechanically machined.

17. The repairing method according to claim 12 ,

wherein the member with the through-hole being sealed with the seal material is subjected to a mechanical machining for removing a damaged point of the member, after the sealing step and prior to the third step.