Clamp for corrosion and plating treatment of aero-engine blade

Abstract

The invention relates to the technical field of aero-engine blade corrosion and plating treatment clamps, in particular to a clamp for aero-engine blade corrosion and plating treatment. The clamp comprises a square groove frame, and a plurality of layers of blade placing frames are stacked in the square groove frame. Each layer of blade placing rack comprises a profiling pore plate and a baffle plate; a plurality of first supporting columns are installed on the profiling hole plate, and a plurality of second supporting columns are installed on the baffle. A plurality of profiling holes are formed in the profiling hole plate, and blades to be treated are inserted into the profiling holes; the baffle is arranged above the profiling hole plate, and the lower end of the second supporting column abuts against the top face of the profiling hole plate. And a gap T between the lower surface of the baffle and the top surface of the tenon head of the blade to be treated is greater than or equal to 5mm and less than or equal to 15mm. The baffle plays a role in axially blocking the to-be-treated blade, and the blade can be blocked by the baffle even if the blade moves upwards under the impact of a solution and cannot fall off from the profiling pore plate.

Description

Technical Field

[0001] The invention relates to the technical field of fixtures for corrosion and plating treatment of aircraft engine blades, and in particular to a fixture for corrosion and plating treatment of aircraft engine blades. Background Art

[0002] The traditional support frame used in the corrosion, pickling and plating process of aircraft engine blades is a simple rectangular slot basket with poor protection effect. Most of the blades are placed flat in the basket due to gravity, and the blades may shake and bump during the corrosion, pickling and plating process. In order to prevent possible bumps during the treatment process, sufficient space must be left between the blades, which greatly affects and reduces the work efficiency of corrosion, pickling and plating, hinders production progress, and the labor intensity of workers is also relatively large. This is a major technical difficulty that needs to be paid attention to and solved in the corrosion, pickling, passivation and plating process of aircraft engine blades, especially in the corrosion, passivation and silver plating process operations. At present, the mainstream fixture design is mostly a rectangular slot basket with a length of 400mm and a width of 300mm. The slot frame is made of polyvinyl chloride material. Due to the low space utilization rate of this rectangular slot basket, the blades will bump against each other during operation, and the basket will accidentally overturn, resulting in a large number of blades falling off, causing excessive corrosion or serious scratches.

[0003] In order to avoid collision between blades and rectangular trough baskets, and between blades, the prior art, such as the patent with publication number CN115889329A, discloses a hanging cleaning fixture, including a cleaning frame for placement in the cleaning tank of an ultrasonic cleaning machine; a fixture plate, arranged in the cleaning frame, and a plurality of profiling holes are arranged on the fixture plate, and the profiling holes are used to insert the blades to be cleaned, and the blades to be cleaned are in a hanging state. The fixture in CN115889329A can also be used for blade corrosion and plating treatment, but there is a problem that the blades are inserted in the fixture plate in a hanging state, and the end faces of the blades are not pressed tightly. During the corrosion and plating treatment of the blades, the corrosion and plating solutions are in a tumbling state under the action of the airflow, and the blades are easily detached from the fixture plate under the impact of the solution. Summary of the invention

[0004] The main purpose of the present invention is to provide a fixture for corrosion and plating treatment of aircraft engine blades, aiming to solve the above technical problems.

[0005] To achieve the above-mentioned purpose, the present invention proposes a fixture for corrosion and plating treatment of aircraft engine blades, including a square slot frame, inside which multiple layers of blade placement racks are stacked; each layer of blade placement racks includes a contoured orifice plate and a baffle; a plurality of first support columns are installed on the contoured orifice plate, and a plurality of second support columns are installed on the baffle; a plurality of contoured holes are arranged on the contoured orifice plate for inserting blades to be treated; the baffle is arranged above the contoured orifice plate, and the lower end of the second support column abuts against the top surface of the contoured orifice plate; the gap between the lower surface of the baffle and the top surface of the tenon of the blade to be treated is T, satisfying: 5mm≤T≤15mm.

[0006] Preferably, the contoured orifice plate, the baffle, the first support column, and the second support column are all made of polypropylene plastic.

[0007] Preferably, on the contoured orifice plate, the distance between two adjacent contoured holes is not less than 20 mm.

[0008] Preferably, five first support columns are installed on the contoured orifice plate, four of which are respectively installed on the through holes at the four corners of the contoured orifice plate, and one of which is installed on the through hole at the center of the contoured orifice plate.

[0009] Preferably, a first boss is provided on the top surface of the first support column; the first support column is inserted into the through hole of the contoured orifice plate via the first boss.

[0010] Preferably, five second support columns are installed on the baffle, four of which are installed on the through holes at the four corners of the baffle, and one of which is installed on the through hole at the center of the baffle.

[0011] Preferably, a second boss is provided on the top surface of the second support column; and the second support column is inserted into the through hole of the baffle through the second boss.

[0012] Preferably, the baffle plate has the same shape as the contoured orifice plate.

[0013] Preferably, handle holes are respectively provided at both ends of the contoured orifice plate.

[0014] Preferably, there is a gap between the contoured hole and the blade body of the blade to be processed.

[0015] Due to the adoption of the above technical solution, the beneficial effects of the present invention are as follows:

[0016] (1) In the present invention, after the blade to be treated is inserted into the contoured orifice plate, the baffle is arranged above the contoured orifice plate, and the gap between the lower surface of the baffle and the top surface of the tenon of the blade to be treated satisfies 5mm≤T≤15mm. Therefore, the baffle plays an axial blocking role for the blade to be treated. Even if the blade moves upward under the impact of the solution, it will be blocked by the baffle and will not fall off the contoured orifice plate.

[0017] (2) In the present invention, since the gap between the lower surface of the baffle and the top surface of the tenon of the blade to be treated satisfies 5mm≤T≤15mm, during the corrosion and plating treatment, the blade can move up and down a distance of 5 to 15mm under the action of the churning solution, so that the contact part between the blade and the contoured hole can also be better corroded and plated, achieving higher surface treatment quality and uniform treatment effect.

[0018] (3) By using the fixture provided by the present invention, the blades are limited to a certain position during the corrosion and plating process, and will not contact each other during the corrosion and plating process, and it is even less likely to cause improper protection problems such as bumps. This greatly improves the treatment quality and protection effect of the blades during the corrosion and plating process.

[0019] (4) In the present invention, multiple layers of blade placement racks are stacked inside the square slot frame, which greatly increases the number of blades that can be corroded and plated in a single slot. This further adapts to the characteristics of mass production and effectively avoids the hidden dangers of blade damage such as scratches during special treatment, ensuring stable, efficient and high-quality operation of the production line. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0021] Figure 1 A schematic diagram of a clamp provided by the present invention;

[0022] Figure 2 A schematic diagram of the structural decomposition of the clamp provided by the present invention;

[0023] Figure 3 It is a schematic diagram of the structure of the square slot frame in the present invention;

[0024] Figure 4 It is a schematic diagram of the structure decomposition of the blade placement rack in the present invention;

[0025] Figure 5It is a schematic diagram of the structure of the contoured orifice plate or baffle in the present invention;

[0026] Figure 6 It is a schematic structural diagram of the first supporting column in the present invention;

[0027] Figure 7 It is a schematic structural diagram of the second supporting column in the present invention.

[0028] Explanation of the accompanying drawings: 1. square slot frame; 2. blade placement rack; 3. contoured hole plate; 3a. contoured hole; 3b. handle hole; 4. baffle; 5. first support column; 5a. first boss; 6. second support column; 6a. second boss. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0031] In addition, the descriptions of "first", "second", etc. in the present invention are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0032] Combination Figures 1 to 7As shown, a specific embodiment of a fixture for corrosion and plating treatment of aircraft engine blades provided by the present invention is shown, the fixture comprises a square slot frame 1, inside which a plurality of layers of blade placement racks 2 are stacked; each layer of blade placement racks 2 comprises a contoured orifice plate 3 and a baffle plate 4; a plurality of first support columns 5 are installed on the contoured orifice plate 3, and a plurality of second support columns 6 are installed on the baffle plate 4; a plurality of contoured holes 3a are provided on the contoured orifice plate 3 for inserting blades 7 to be treated; the baffle plate 4 is arranged above the contoured orifice plate 3, and the lower end of the second support column 6 abuts against the top surface of the contoured orifice plate 3; the gap between the lower surface of the baffle plate 4 and the top surface of the tenon of the blade 7 to be treated is T, which satisfies: 5mm≤T≤15mm. After inserting the blade to be treated on the profiling orifice plate 3, the baffle plate 4 is arranged above the profiling orifice plate 3, so that the baffle plate 4 plays an axial blocking role for the blade to be treated 7, and even if the blade moves upward under the impact of the solution, it will be blocked by the baffle plate 4 and will not fall off the profiling orifice plate 3. In addition, under the action of the churning solution, the blade can move up and down by a distance of 5 to 15 mm, so that the contact part between the blade and the profiling hole 3a can also be better corroded and plated, achieving a higher surface treatment quality and uniform treatment effect.

[0033] In this embodiment, the purpose of providing the first support column 5 is to prevent the blade tip from contacting the baffle 4 or the bottom of the square slot frame 1. The requirement of the clearance T is ensured by selecting the second support column 6 of suitable height.

[0034] In this embodiment, the materials of the contoured orifice plate 3, the baffle plate 4, the first support column 5, and the second support column 6 are all polypropylene plastic. Polypropylene plastic has excellent acid and alkali resistance, good high and low temperature mechanical properties and weather resistance, and can excellently meet the requirements of being used as a corrosion and plating treatment fixture material. This material does not react with the blades and the tank liquid, and can ensure the quality of corrosion and plating treatment.

[0035] In this embodiment, on the profiling hole plate 3, the distance between two adjacent profiling holes 3a is not less than 20 mm, so as to ensure the convenience of the blades during loading and unloading.

[0036] Combination Figure 2 , Figure 4 As shown, in order to ensure the supporting effect of the first support column 5, five first support columns 5 are installed on the contoured orifice plate 3, four of which are respectively installed on the through holes at the four corners of the contoured orifice plate 3, and one is installed on the through hole in the center of the contoured orifice plate 3.

[0037] Combination Figure 5 , Figure 6 As shown, a first boss 5 a is provided on the top surface of the first support column 5 ; the first support column 5 is inserted into the through hole of the contoured orifice plate 3 via the first boss 5 a.

[0038] Combination Figure 2 , Figure 4 As shown, five second support columns 6 are installed on the baffle plate 4 , four of which are installed on the through holes at the four corners of the baffle plate 4 , and one of which is installed on the through hole at the center of the baffle plate 4 .

[0039] Combination Figure 5 , Figure 7 As shown, a second boss 6 a is provided on the top surface of the second support column 6 ; the second support column 6 is inserted into the through hole of the baffle 4 via the second boss 6 a.

[0040] In this embodiment, the baffle plate 4 has the same shape as the profiling orifice plate 3. Therefore, the baffle plate 4 also has the same profile hole as the profiling hole 3a, forming a hollow structure, so as to achieve the purpose of tank liquid flow. The baffle plate 4 and the profiling orifice plate 3 have the same shape, but the height of the support column they are assembled is different. The structural design of the two having the same shape improves the interchangeability of the baffle plate 4 and the profiling orifice plate 3.

[0041] Combination Figure 2 As shown, handle holes 3b are respectively provided at both ends of the contoured orifice plate 3 to facilitate the operation of the operator.

[0042] In this embodiment, there is a gap between the contoured hole 3a and the blade body of the blade to be treated 7, and the single-side gap is not less than 1.0 mm, so that the blade can move up and down under the action of the churning solution.

[0043] Combination Figure 3 As shown, the square groove frame 1 is a rectangular frame structure with an open top and a hollow bottom wall.

[0044] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A fixture for corrosion and plating treatment of aircraft engine blades, comprising a square slot frame (1), characterized in that: Multiple layers of blade placement racks (2) are stacked inside the square slot frame (1); Each layer of blade placement rack (2) comprises a contoured orifice plate (3) and a baffle plate (4); a plurality of first support columns (5) are mounted on the contoured orifice plate (3), and a plurality of second support columns (6) are mounted on the baffle plate (4); The profiling hole plate (3) is provided with a plurality of profiling holes (3a) for inserting the blades (7) to be processed; The baffle plate (4) is arranged above the contoured orifice plate (3), and the lower end of the second support column (6) abuts against the top surface of the contoured orifice plate (3); The gap between the lower surface of the baffle (4) and the top surface of the tenon of the blade to be processed (7) is T, which satisfies: 5mm≤T≤15mm.

2. A fixture for corrosion and plating treatment of aircraft engine blades as claimed in claim 1, characterized in that: The materials of the contoured orifice plate (3), the baffle plate (4), the first support column (5) and the second support column (6) are all polypropylene plastic.

3. A fixture for corrosion and plating treatment of aircraft engine blades as claimed in claim 1, characterized in that: On the profiling orifice plate (3), the distance between two adjacent profiling holes (3a) is not less than 20 mm.

4. A fixture for corrosion and plating treatment of aircraft engine blades as claimed in claim 1, characterized in that: Five first support columns (5) are installed on the profiling orifice plate (3), four of which are installed on the through holes at the four corners of the profiling orifice plate (3), and one of which is installed on the through hole at the center of the profiling orifice plate (3).

5. A fixture for corrosion and plating treatment of aircraft engine blades as claimed in claim 4, characterized in that: A first boss (5a) is provided on the top surface of the first support column (5); the first support column (5) is inserted into the through hole of the contoured orifice plate (3) via the first boss (5a).

6. A fixture for corrosion and plating treatment of aircraft engine blades as claimed in claim 1, characterized in that: Five second support columns (6) are installed on the baffle (4), four of which are installed on through holes at the four corners of the baffle (4), and one of which is installed on the through hole at the center of the baffle (4).

7. A fixture for corrosion and plating treatment of aircraft engine blades as claimed in claim 6, characterized in that: A second boss (6a) is provided on the top surface of the second support column (6); the second support column (6) is inserted into the through hole of the baffle (4) via the second boss (6a).

8. A fixture for corrosion and plating treatment of aircraft engine blades as claimed in claim 1, characterized in that: The baffle plate (4) has the same shape as the contoured orifice plate (3).

9. A fixture for corrosion and plating treatment of aircraft engine blades as claimed in claim 1, characterized in that: Handle holes (3b) are respectively arranged at both ends of the contoured orifice plate (3).

10. A fixture for corrosion and plating treatment of aircraft engine blades as claimed in claim 1, characterized in that: There is a gap between the contoured hole (3a) and the blade body of the blade (7) to be processed.

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