JP4622051B2 - Wing repair jig - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a blade repair jig , and more particularly to a technology for repairing a moving blade and a stationary blade of a jet engine.
[0002]
[Prior art and problems to be solved by the invention]
The above moving blades and stationary blades (hereinafter simply referred to as blades) are made of a material having excellent wear resistance, but the tip portion is worn by rubbing, and the performance of the engine decreases with time due to the wear. . For this reason, the tip of the wing is periodically restored to a prescribed shape. Conventionally, in the restoration of the wing, the worn tip portion is built up by a build-up welding technique, and the built-up portion is manually shaped into a specified wing shape. For example, such a wing is made of a titanium alloy as a material, and after welding a welding rod similar to the material of the wing, that is, a welding rod made of a titanium alloy to the tip of the wing with a predetermined thickness, Shape shaping to the wing shape of the dimension.
[0003]
However, the shape shaping is performed manually, and the workability is extremely poor. The wing material such as the titanium alloy is excellent in wear resistance, so that shape shaping is not easy, and it takes a lot of time and labor for shape shaping.
[0004]
The present invention has been made in view of the above-described problems, and aims to improve the workability of blade repair.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, in the present invention, as a means related to a blade repairing jig, in a blade repairing jig used when repairing the tip of a blade to be repaired to the shape of a regular blade, inert welding is performed. A first blade holding member provided with a gas outlet and a second blade holding member provided with a butt welding window, and the first blade holding member and the second blade. With the holding member, the repair member having the tip shape of the regular wing aligned with the tip of the wing to be repaired and the tip of the wing to be repaired, the abutting portion of the repair member and the wing to be repaired to the heating window portion While sandwiching so as to be positioned, means for blowing out the inert gas for welding from the outlet toward the abutting portion is adopted.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of a blade repairing jig according to the present invention will be described with reference to the drawings.
[0009]
FIG. 1 is a perspective view showing a configuration of a wing repair jig and an arrangement state of repair target wings and repair members with respect to the wing repair jig in the present embodiment. In this figure, reference numeral 1 denotes a first holding fitting (first blade holding member), 2 denotes a second holding fitting (second blade holding member), 3 denotes a repair target blade, 4 denotes a repair member, and 5A to 5A. 5D is a bolt, and 6A to 6D are nuts. Among these components, the first holding metal fitting 1, the second holding metal fitting 2, the bolts 5A to 5D, and the nuts 6A to 6D constitute the blade repair jig in the present embodiment.
[0010]
The first holding metal fitting 1 includes a rectangular plate material 1a, a pipe 1b fixed in a penetrating manner to the plate material 1a, and a plurality of blowers that are arranged in a line at the center of the surface of the plate material 1a and communicate with the pipe 1b. It is comprised from the exit 1c. The 2nd holding metal fitting 2 is comprised from the board | plate material 2a of the same shape as the said board | plate material 1a, and the butt-welding window part 2b opened to the center part of this board | plate material 2a. The restoration target wing 3 has a tip that is worn with respect to a regular wing having an original shape, and is made of, for example, a titanium alloy (titanium-nickel alloy).
[0011]
The repair member 4 is formed in the same shape as the tip shape of the regular wing, and its thickness D is set to be approximately equal to the wear amount of the wing 3 to be repaired. The material of the repair member 4 is a titanium alloy like the repair target wing 3. The bolts 5A to 5D and the nuts 6A to 6D are for fixing the first holding metal fitting 1 and the second holding metal fitting 2 to each other with the repair target wing 3 and the repair member 4 sandwiched therebetween as shown in the figure. It is.
[0012]
Next, a method of repairing the repair target wing 3 using the wing repair jig having the above configuration will be described in detail with reference to FIGS.
[0013]
[Positioning process]
First, the repair target wing 3 and the repair member 4 are aligned at a predetermined position on the surface of the first holding metal fitting 1. That is, as shown in FIG. 1, the repair member 4 is arranged on the first holding metal fitting 1 so that the arrangement position of the outlets 1 c and the end surface 4 a of the repair member 4 are in the same position. Then, the first blade 3 to be repaired is placed so that the tip surface 3a of the blade 3 to be repaired contacts the end surface 4a, that is, the tip surface 3a of the blade 3 to be repaired is at the same position as the arrangement position of the outlet 1c. It is arranged on the holding metal fitting 1.
[0014]
By the above, the front end surface 3a of the repair object wing | blade 3 and the end surface 4a of the repair member 4 are arrange | positioned in a line, and it aligns along the arrangement position of the blower outlet 1c. When this alignment is completed, as shown in FIG. 2, the first holding metal fitting 1 and the second holding metal fitting 2 are fixed to each other by the bolts 5A to 5D and the nuts 6A to 6D. The repair target wing 3 and the repair member 4 are held and fixed between the first holding metal 1 and the second holding metal 2 by the metal fitting 2.
[0015]
[Welding process]
Subsequently, the tip surface 3a and the end surface 4a that are in contact with each other, that is, the butt portion between the repair target blade 3 and the repair member 4 are welded (butt welding). Prior to the butt welding, argon gas is supplied to the pipe 1b from an external argon gas source (not shown), and argon gas is blown from the outlets 1c to the butt portion. As a result, the vicinity of the abutting portion is effectively made an inert gas atmosphere by the argon gas blown out from each outlet 1c positioned along the abutting portion. In this inert gas atmosphere, the butt portion exposed to the butt welding window portion 2 is heated by a welding torch for butt welding.
[0016]
[Shaping process]
FIG. 3 shows the repair target wing 3 in which the repair member 4 is welded to the tip as a result of the butt welding. In this figure, the code | symbol X is a welding part and is a part corresponded to the said abutting part vicinity. Thus, since the welding part X will be in the state which raised a little with respect to the repair object wing | blade 3 and the repair member 4, the said welding part X is shaped so that it may become a shape of a regular wing | blade.
[0017]
The welded portion X is a limited region in the vicinity of the abutting portion between the repair target wing 3 and the repair member 4 and has a narrow shaping range as compared with the repair by conventional overlay welding. In addition, conventionally, it has been necessary to shape the build-up welded portion as a whole to the shape of the tip of the regular wing. However, in this embodiment, the repair member 4 is shaped in advance to the shape of the tip of the regular wing. Easy. Therefore, according to the present embodiment, the work time can be shortened as the shaping process becomes easier as described above, and the workability of blade repair can be improved.
[0018]
【The invention's effect】
As described above, according to the wing repair jig according to the present invention, the following effects are obtained.
[0021]
According to the first aspect of the invention, by a first wing holding member and the second blade holding member while sandwiching the tip and the repair section of repaired blades of the butting condition, the butting portion from the air outlet Since the welding inert gas is blown out and the butt portion is welded from the butt welding window portion of the second blade holding member, the butt welding between the repair target blade and the repair member can be performed efficiently. At the same time, it is possible to realize a stable welding quality by ensuring that the vicinity of the butt portion is an inert gas atmosphere.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a configuration of a wing repair jig and an arrangement state of repair target wings and repair members with respect to the wing repair jig in an embodiment of the present invention.
FIG. 2 is a perspective view showing a state in which a repair target wing and a repair member are fixed by a wing repair jig in an embodiment of the present invention.
FIG. 3 is a perspective view showing a state of a butt welded blade in an embodiment of the present invention.
[Explanation of symbols]
1 …… First holding bracket (first blade holding member)
2. Second holding bracket (second blade holding member)
3. Repair target blade 4 ... Repair members 5A-5D ... Bolts 6A-6D ... Nut X ... Welded part

Claims (1)

A wing repair jig used to repair the tip of a wing to be repaired to the shape of a regular wing,
  A first blade holding member provided with a welding inert gas outlet;
  A second blade holding member provided with a butt welding window,
  With the first blade holding member and the second blade holding member, the repair member having the tip shape of the normal wing aligned with the tip of the repair target wing and the tip of the repair target wing are repaired, and The blade repairing jig is characterized in that the abutting portion of the blade to be repaired is sandwiched so as to be positioned in the heating window portion, and an inert gas for welding is blown out from the outlet toward the abutting portion.

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