JP3997315B2 - Blade fixing jig for blade surface polishing equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a blade fixing jig of a blade surface polishing apparatus for polishing a blade surface of a turbine or a compressor.
[0002]
[Prior art]
In order to exhibit the performance of a jet engine, the surface of a stationary blade or moving blade (hereinafter simply referred to as “blade”) of a turbine or a compressor must have a desired surface roughness. For this purpose, a blade surface polishing apparatus for polishing the surface of the blade is used.
[0003]
FIG. 3 is a front view (A) and a side view (B) of the blade surface polishing apparatus. In the blade surface polishing apparatus 1, a guide rail 4 that extends in the vertical direction is arranged and fixed above the base table 3, and a guide block 6 that can be moved up and down by a lifting drive unit 5 is engaged with the guide rail 4. The rotation drive device 7 is installed downward on the front surface of the guide block 6, and a blade fixing jig 8 for fixing one end of the blade 2 is connected to the rotation drive device 7. A tumbling container 9 containing polishing media is arranged below the blade fixing jig 8.
[0004]
FIG. 4 is a schematic diagram of the blade, and FIG. 5 is a relational diagram between the blade 2 and the tumbling container 9 by the conventional blade fixing jig 8. The blade fixing jig 8 fixes the root portion 2a (tab tail portion) of the blade 2 and horizontally swivels in a state where the blade wing portion 2b is placed in the polishing medium in the tumbling container 9 with the blade wing 2b facing downward. Yes. The polishing media is a ceramic ball or column having a diameter of 3 mm to 6 mm. By the revolving motion of the blade 2 in the tumbling container 9, the polishing media contacts the blade 2 and polishes the surface thereof.
[0005]
[Problems to be solved by the invention]
As shown in FIG. 5, in the conventional blade fixing jig 8, the blade is set in the polishing medium at a substantially right angle to the traveling direction so that the back side or the abdomen side of the blade faces the turning direction of the blade. It was. Further, the root portion 2a of the blade is fixed by a jig, but the entire wing portion 2b is exposed, and the entire surface of the wing portion is simultaneously polished with a polishing medium.
[0006]
However, such a conventional jig has a problem that the surface roughness of the back side and the abdomen side of the wing portion 2b is not uniform because the polishing media does not flow smoothly on the wing surface. On the other hand, the blade tip and the leading edge (leading edge) and trailing edge (trading edge) of the blade flow too smoothly in the polishing media, resulting in excessive local polishing, metal loss, and blade width and height. There has been a problem that the desired dimensions cannot be maintained.
[0007]
The present invention has been developed to solve the above-described problems. That is, an object of the present invention is to suppress excessive polishing of the blade tip and the leading edge and trailing edge of the blade, and to maintain the blade width and blade height in desired dimensions, and to achieve the back side and the belly. An object of the present invention is to provide a blade fixing jig for a blade surface polishing apparatus capable of uniformly polishing the side to a desired surface roughness.
[0008]
[Means for Solving the Problems]
According to the present invention, the fitting holding member (1) having the upper end fixed to the blade surface polishing device (1) for horizontally turning the blade and fitting the root (2a) of the blade to the lower end so as to be detachably held. 12) and a protector member (20) for suppressing polishing of the blade tip, leading edge and trailing edge of the blade portion (2b) of the blade attached downward to the fitting holding member, the fitting holding member (12) provides a blade fixing jig for a blade surface polishing apparatus, wherein the blade (2b) is inclined at a predetermined angle with respect to the turning direction of the blade.
[0009]
According to a preferred embodiment of the present invention, the protector member (20) is a rectangular U-shaped member spaced from the blade tip, leading edge and trailing edge of the blade portion (2b), and the blade tip. In addition, the abrasive media is prevented from directly colliding with the leading edge and the trailing edge.
[0010]
The fitting holding member (12) includes a lower holding portion (13) having a horizontal groove (13a) in which a root portion of the blade is horizontally fitted and an insertion port (13b) of the horizontal groove, and the lower portion A vertical rod (14) whose lower end is fixed to the holding portion and which extends upward and whose upper end portion is fixed to the blade surface polishing apparatus (1), and a groove for closing the insertion port (13b) of the lower holding portion so as to be opened and closed A cover (15) and a groove cover opening / closing tool that opens and closes the groove cover and holds the groove cover in that position.
[0011]
According to the configuration of the present invention, the fitting holding member (12) is configured to incline the wing part (2b) at a predetermined angle with respect to the turning direction of the blade. By tilting with respect to the swivel direction, the polishing media can easily flow on the blade surface, and a more uniform surface finish can be obtained.
[0012]
The protector member (20) is a rectangular U-shaped member that is spaced from the blade tip, leading edge, and trailing edge of the blade portion (2b). , The relative velocity of the polishing media near the blade tip, leading edge and trailing edge is reduced, and local material loss can be prevented accordingly.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. In each figure, common portions are denoted by the same reference numerals, and redundant description is omitted.
[0014]
FIG. 1 is a configuration diagram of a blade fixing jig of the present invention. In this figure, (A) is a front view seen from the back side of the blade, (B) is a side view, and (C) is a bottom view seen from below.
[0015]
The blade fixing jig 10 shown in this figure has its upper end 14a fixed to a blade surface polishing apparatus 1 (not shown) (see FIG. 4), and rotates the blade 2 horizontally. In this example, a pair of blade fixing jigs 10 are separately attached to the blade surface polishing apparatus 1. However, as in FIG. 4, the pair of blade fixing jigs 10 are connected in advance at the upper portion and attached integrally. May be.
[0016]
As shown in FIG. 1, the blade fixing jig 10 includes a fitting holding member 12 and a protector member 20.
[0017]
The fitting holding member 12 includes a lower holding portion 13, a vertical rod 14, a groove cover 15, and a groove cover opening / closing tool 16.
[0018]
The lower holding part 13 has a horizontal groove 13a in which the root part 2a of the blade 2 is horizontally fitted and an insertion port 13b for the horizontal groove, and is attached to and detached from the horizontal groove 13a by horizontally fitting the root part 2a of the blade. Hold as possible.
[0019]
The vertical rod 14 has a lower end fixed to the lower holding portion 13 and extends upward, and an upper end portion 14 a is fixed to the blade surface polishing apparatus 1. This fixed part has a well-known connecting means (key, sbrine, etc.) for preventing rotation around the axis of the vertical rod 14 and tilts the blade wing part 2b at a predetermined angle θ with respect to the turning direction of the blade. Positioning. This predetermined angle θ is similar to the opposite angle of the wing during use, and when polishing the back, the polishing media is set so that it collides with the wing with a backlash, and when polishing the abdominal surface, it is polished. Set the media so that it collides with the wing with a bang. The angle θ of the back strike or belly strike is preferably about 10 to 30 °, but it is particularly preferable to set the angle to an optimum angle depending on the blade shape.
[0020]
The groove cover 15 is a rectangular plate that closes the insertion opening 13b of the lower holding portion 13, and moves up and down to close the insertion opening 13b. The groove cover opening / closing tool 16 includes a connecting rod 16a having a lower end connected to the groove cover 15 and extending upward, and a lock mechanism 16b that moves the upper end up and down and can be fixed at the upper and lower positions. It is designed to hold in that position.
[0021]
The protector member 20 is a rectangular U-shaped member located at a distance from the blade tip, leading edge, and trailing edge of the blade portion 2b. In this example, the U-shaped member is a round bar having a circular cross section. In addition, the U-shaped portions of the round bars are spaced apart from the blade tip, leading edge, and trailing edge, respectively, by which the polishing media cannot easily flow. In the case where the polishing media is a spherical or cylindrical material, this interval is preferably set to about 1 to 2 times the representative dimension (for example, diameter) of the polishing media so as to prevent the polishing media from directly colliding.
[0022]
Also, the blade fixing jig of the present invention is preferably provided separately for backside polishing and for abdominal polishing, and in this case, the protector member 20 is provided at different positions for backside polishing and for abdominal polishing. Is good.
[0023]
FIG. 2 is a diagram showing the relationship between the blade and the tumbling container by the blade fixing jig of the present invention. In this example, a blade fixing jig for backside polishing is shown, and the protector member 20 is slightly spaced from the front and rear edges of the wing 2b and slightly on the ventral side (center O side of the container). There is a shift. With this configuration, when the blade 2 is swung horizontally around the center O of the container, the flow of the polishing media flowing along the back side of the blade is not obstructed, and the leading edge and the trailing edge of the wing portion 2b are prevented. Direct collision of the polishing media can be suppressed.
[0024]
In the case of the blade fixing jig for abdominal side polishing, when a protector member is provided at a position indicated by 20 'slightly shifted to the back side and the blade 2 is horizontally swiveled around the center O of the container, The direct impact of the polishing media on the front and rear edges of the wing portion 2b is preferably suppressed without hindering the flow of the polishing media flowing along the ventral side of the blade.
[0025]
The present invention is not limited to the embodiments described above, and various modifications can be made without departing from the scope of the invention.
[0026]
【The invention's effect】
According to the configuration of the present invention described above, since the fitting holding member 12 tilts the blade portion 2b at a predetermined angle with respect to the blade turning direction, the blade component (blade 2) is turned in the turning direction. By tilting it, the polishing media can easily flow on the blade surface, and a more uniform surface finish can be obtained.
[0027]
The protector member 20 is a rectangular U-shaped member that is spaced from the blade tip, leading edge, and trailing edge of the blade portion 2b, and the polishing media directly collides with the blade tip, leading edge, and trailing edge. Therefore, the relative speed of the polishing media in the vicinity of the blade tip, the leading edge and the trailing edge is reduced, and accordingly, local material loss can be prevented.
[0028]
Therefore, the blade fixing jig of the blade surface polishing apparatus of the present invention can keep the blade width and blade height at desired dimensions by suppressing excessive polishing of the blade tip and blade leading edge and trailing edge. And has an excellent effect that the dorsal side and the ventral side can be uniformly polished to a desired surface roughness.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of a blade fixing jig of the present invention.
FIG. 2 is a diagram showing the relationship between a blade and a tumbling container using a blade fixing jig according to the present invention.
FIG. 3 is a front view and a side view of a blade surface polishing apparatus.
FIG. 4 is a perspective view of a blade.
FIG. 5 is a diagram showing a relationship between a blade and a tumbling container using a conventional blade fixing jig.
[Explanation of symbols]
1 blade surface polishing equipment, 2 blades,
2a root part, 2b wing part, 3 base stand,
4 guide rails, 5 lifting drive,
6 guide block, 7 rotation drive device,
8 blade fixing mechanism, 9 tumbling container,
10 blade fixing jig, 12 fitting holding member,
13 Lower holding part, 13a Horizontal groove, 13b Insertion slot,
14 vertical rod, 15 groove cover,
16 Groove cover opening / closing tool,
20 Protector members

Claims (3)

A fitting holding member (12) having an upper end fixed to the blade surface polishing apparatus (1) for horizontally turning the blade and having the bottom (2a) of the blade fitted to the lower end so as to be detachably held; And a protector member (20) that suppresses polishing of the blade tip, leading edge, and trailing edge of the blade portion (2b) of the blade attached downward to the joint holding member, and the fitting holding member (12) A blade fixing jig for a blade surface polishing apparatus, wherein the portion (2b) is inclined at a predetermined angle with respect to the turning direction of the blade. The protector member (20) is a rectangular U-shaped member spaced from the blade tip, leading edge and trailing edge of the blade portion (2b), and a polishing medium is placed on the blade tip, leading edge and trailing edge. 2. The blade fixing jig of a blade surface polishing apparatus according to claim 1, wherein the blade surface polishing apparatus is configured to suppress direct collision. The fitting holding member (12) includes a lower holding portion (13) having a horizontal groove (13a) in which a base portion of a blade is horizontally fitted and an insertion port (13b) of the horizontal groove, and the lower holding portion. A vertical rod (14) whose lower end is fixed to the upper surface and the upper end is fixed to the blade surface polishing apparatus (1), and a groove cover (for opening and closing the insertion port (13b) of the lower holding portion). The blade fixing jig of the blade surface polishing apparatus according to claim 1, further comprising: 15) and a groove cover opening / closing tool (16) for opening and closing the groove cover and holding the groove cover at the position.

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