Device and method for detecting step difference of upper edge plate and lower edge plate of double-mounting-plate blade

Abstract

The invention relates to the technical field of aero-engine blade detection, in particular to a device and method for detecting the step difference of upper and lower edge plates of a double-mounting-plate blade. The detection device comprises a bottom plate and a positioning plate, and the positioning plate is vertically arranged on the top surface of the bottom plate; a first supporting pin and a second supporting pin are arranged on the bottom plate and are respectively used for supporting an upper edge plate and a lower edge plate of the blade; a stop pin is inserted in the positioning plate and used for abutting against the tail end of the lower edge plate. When in use, the blade is placed on the detection device, so that the lower ends of an upper edge plate and a lower edge plate of the blade are respectively supported on the first supporting pin and the second supporting pin, and the side planes of the upper edge plate and the lower edge plate of the blade are respectively propped against the positioning plate; the tail end of the lower edge plate abuts against the outer cylindrical face of the stop pin. The values of the detected surfaces of the tops of the upper margin plate and the lower margin plate are read through meter reading, and the difference value of two times of meter reading is calculated, namely the real step difference of the upper margin plate and the lower margin plate of the blade.

Description

Technical Field

[0001] The invention relates to the technical field of aero-engine blade detection, and in particular to a device and method for detecting the step difference between the upper and lower edge plates of a double-mounting plate blade. Background Art

[0002] Aircraft engines are highly complex and precise thermomechanical devices. In aircraft engines, blades are key core components, with large numbers, complex shapes, high precision requirements, and great processing difficulty, accounting for more than 30% of the workload in engine manufacturing. Blade types include arc teeth, straight teeth, journals, single mounting plates, double mounting plates, etc.

[0003] The double-mounting plate blade has a complex structure, consisting of an upper edge plate, a lower edge plate, and a blade body. The step difference between the lower edge plate and the upper edge plate must be accurate. The current measurement method is to manually fix the blade for measurement, which results in unstable measurement conditions and large dimensional errors. Summary of the invention

[0004] The main purpose of the present invention is to provide a device and method for detecting the step difference between the upper and lower edge plates of a double-mounting plate blade, aiming to solve the above-mentioned technical problems.

[0005] To achieve the above-mentioned purpose, on the one hand, the present invention proposes a detection device for the step difference between the upper and lower edge plates of a double-mounting plate blade, comprising a base plate and a positioning plate, wherein the positioning plate is vertically arranged on the top surface of the base plate near one of the long sides, and the long direction of the positioning plate is parallel to the long direction of the base plate; a first supporting pin and a second supporting pin are arranged on the base plate, respectively used to support the upper edge plate and the lower edge plate of the blade; a stop pin is inserted on the positioning plate, used to abut against the tail end of the lower edge plate.

[0006] Preferably, a first lightening hole is provided on the bottom plate.

[0007] Preferably, a second lightening hole is provided on the positioned plate.

[0008] Preferably, a first supporting block is provided on the vertical surface of the positioning plate for supporting against the side plane of the upper edge plate.

[0009] Preferably, two second supporting blocks are arranged on the vertical surface of the positioning plate to abut against the side plane of the lower edge plate.

[0010] Preferably, the detection device also includes a table block for being placed on the top surface of the upper edge plate to be inspected to compensate for the step difference between the upper and lower edge plates.

[0011] Preferably, a fixing column is arranged on the top surface of the positioning plate, and the alignment block is connected with a wire by punching and threading, and the wire is tied to the fixing column.

[0012] Preferably, the base plate and the positioning plate are fastened and connected by screws and pins.

[0013] On the other hand, the present invention also provides a method for detecting the step difference between the upper and lower edge plates of a double-mounting plate blade, using the above-mentioned detection device, comprising the following steps:

[0014] S1. Place the testing device on the testing platform with a dial indicator;

[0015] S2, placing the blade on the detection device, so that the lower ends of the upper edge plate and the lower edge plate of the blade are supported on the first supporting pin and the second supporting pin respectively, and the side planes of the upper edge plate and the lower edge plate of the blade are respectively against the positioning plate; the tail end of the lower edge plate is against the outer cylindrical surface of the stop pin;

[0016] S3. Use a meter to read the values ​​of the top surfaces of the upper and lower edge plates respectively, and calculate the difference between the two readings, which is the actual step difference between the upper and lower edge plates of the blade.

[0017] Preferably, in step S3, if the height difference between the upper edge plate and the lower edge plate is greater than the measuring range of the dial indicator, it is necessary to use a meter block to compensate for the step difference between the upper and lower edge plates. The operation method is: place the meter block on the inspected surface at the top of the upper edge plate, read the value of the top surface of the meter block, and then read the value of the top surface of the lower edge plate. The difference between the two meter values ​​plus the thickness of the meter block is calculated, which is the actual step difference between the upper and lower edge plates of the blade.

[0018] Due to the adoption of the above technical solution, the beneficial effects of the present invention are as follows:

[0019] (1) By using the detection device provided by the present invention to fix the blade, the measurement result is more accurate and the measurement cycle is shorter than that of manual support.

[0020] (2) In the present invention, the step difference between the upper and lower edge plates of the meter block is compensated to avoid exceeding the measuring range of the dial indicator, and the vertical movement of the meter base is unnecessary, thereby reducing the measurement error.

[0021] (3) The detection device provided by the present invention has a simple structure and is easy to process and assemble. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] 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.

[0023] Figure 1 A front view of the detection device provided by the present invention;

[0024] Figure 2 This is a top view of the detection device provided by the present invention.

[0025] Explanation of the accompanying drawings: 1. Base plate; 1a. First lightening hole; 2. First supporting pin; 3. Alignment block; 4. Positioning plate; 4a. Second lightening hole; 4b. First supporting block; 4c. Second supporting block; 5. Second supporting pin; 6. Stop pin; 7. Fixing column; 8. Screw; 9. Pin; 10. Lower edge plate; 11. Upper edge plate; 12. Blade; 13. Thread. DETAILED DESCRIPTION

[0026] 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.

[0027] 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.

[0028] 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.

[0029] Combination Figure 1 , Figure 2 As shown, on the one hand, this embodiment provides a detection device for the step difference between the upper and lower edge plates of a double-mounting plate blade, comprising a base plate 1 and a positioning plate 4, wherein the positioning plate 4 is vertically arranged on the top surface of the base plate 1 near one of the long sides, and the long direction of the positioning plate 4 is parallel to the long direction of the base plate 1; a first supporting pin 2 and a second supporting pin 5 are arranged on the base plate 1, respectively used to support the upper edge plate 11 and the lower edge plate 10 of the blade 12; a stop pin 6 is inserted on the positioning plate 4, used to abut against the tail end of the lower edge plate 10.

[0030] In order to reduce the weight of the entire detection device, a first lightening hole 1a is provided on the bottom plate 1. Further, a second lightening hole 4a is provided on the positioning plate 4. Both the first lightening hole 1a and the second lightening hole 4a are rectangular through-hole structures.

[0031] In this embodiment, the detection device further includes a table block 3, which is placed on the top surface of the upper edge plate 11 to be inspected, and compensates for the step difference between the upper and lower edge plates. In order to prevent the table block 3 from being lost, a fixing column 7 is provided on the top surface of the positioning plate 4, and the table block 3 is connected with a thread 13 by punching and threading, and the thread 13 is tied to the fixing column 7.

[0032] In this embodiment, the base plate 1 and the positioning plate 4 are made of a split structure, and the two are fastened together by screws 8 and pins 9.

[0033] On the other hand, this embodiment also provides a method for detecting the step difference between the upper and lower edge plates of a double-mounting plate blade, using the above-mentioned detection device, comprising the following steps:

[0034] S1. Place the detection device on the detection platform with a dial indicator.

[0035] S2. Place the blade 12 on the detection device so that the lower ends of the upper edge plate 11 and the lower edge plate 10 of the blade 12 are supported on the first supporting pin 2 and the second supporting pin 5 respectively, and the side planes of the upper edge plate 11 and the lower edge plate 10 of the blade 12 are respectively against the positioning plate 4; the tail end of the lower edge plate 10 is against the outer cylindrical surface of the stop pin 6; the positioning of the blade 12 is completed.

[0036] S3, respectively read the values ​​of the top of the upper edge plate 11 and the lower edge plate 10 to be tested, and calculate the difference between the two readings, which is the real step difference between the upper and lower edge plates of the blade.

[0037] Furthermore, in step S3, if the height difference between the upper edge plate 11 and the lower edge plate 10 is greater than the measuring range of the dial indicator, it is necessary to use the dial block 3 to compensate for the step difference between the upper and lower edge plates. The operation method is: place the dial block 3 on the inspected surface at the top of the upper edge plate 11, read the value of the top surface of the dial block 3, and then read the value of the top surface of the lower edge plate 10. The difference between the two readings and the thickness of the dial block 3 is calculated, which is the actual step difference between the upper and lower edge plates of the blade.

[0038] In order to reduce the contact area between the vertical surface of the positioning plate 4 and the side planes of the upper edge plate 11 and the lower edge plate 10, and improve the positioning accuracy. Therefore, a first support block 4b is provided on the vertical surface of the positioning plate 4, which is used to abut on the side plane of the upper edge plate 11. Two second support blocks 4c are provided on the vertical surface of the positioning plate 4, which are used to abut on the side plane of the lower edge plate 10. In the step S2, when the blade 12 is placed on the detection device, the side plane of the upper edge plate 11 abuts on the first support block 4b, and the side plane of the lower edge plate 10 abuts on the two second support blocks 4c. By using a first support block 4b, two second support blocks 4c, a first support pin 2, and a second support pin 5 to form a six-point positioning structure for the blade 12, the positioning accuracy is improved.

[0039] 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 device for detecting the step difference between the upper and lower edge plates of a double-mounting plate blade, characterized in that: It comprises a bottom plate (1) and a positioning plate (4), wherein the positioning plate (4) is vertically arranged on the top surface of the bottom plate (1) at a position close to one of the long sides, and the long direction of the positioning plate (4) is parallel to the long direction of the bottom plate (1); A first supporting pin (2) and a second supporting pin (5) are provided on the bottom plate (1), respectively used to support an upper edge plate (11) and a lower edge plate (10) of a blade (12); A stop pin (6) is inserted into the positioning plate (4) and is used to abut against the rear end of the lower edge plate (10).

2. A device for detecting the step difference between the upper and lower edge plates of a double-mounting plate blade as claimed in claim 1, characterized in that: A first lightening hole (1a) is provided on the bottom plate (1).

3. A device for detecting the step difference between the upper and lower edge plates of a double-mounting plate blade as claimed in claim 1, characterized in that: A second lightening hole (4a) is provided on the positioned plate (4).

4. A device for detecting the step difference between the upper and lower edge plates of a double-mounting plate blade as claimed in claim 1, characterized in that: A first supporting block (4b) is arranged on the vertical surface of the positioning plate (4) for supporting against the side plane of the upper edge plate (11).

5. A device for detecting the step difference between the upper and lower edge plates of a double-mounting plate blade as claimed in claim 1, characterized in that: Two second supporting blocks (4c) are arranged on the vertical surface of the positioning plate (4) for supporting against the side plane of the lower edge plate (10).

6. A device for detecting the step difference between the upper and lower edge plates of a double-mounting plate blade as claimed in claim 1, characterized in that: It also includes a counter block (3) which is used to be placed on the top surface of the upper edge plate (11) to be inspected and to compensate for the step difference between the upper and lower edge plates.

7. A device for detecting the step difference between the upper and lower edge plates of a double-mounting plate blade as claimed in claim 1, characterized in that: A fixing column (7) is arranged on the top surface of the positioning plate (4), and the alignment block (3) is connected with a thread (13) by punching and threading, and the thread (13) is tied to the fixing column (7).

8. A device for detecting the step difference between the upper and lower edge plates of a double-mounting plate blade as claimed in claim 1, characterized in that: The base plate (1) and the positioning plate (4) are fastened and connected by means of screws (8) and pins (9).

9. A method for detecting the step difference between the upper and lower edge plates of a double-mounting plate blade, characterized in that: The detection device according to any one of claims 1 to 8 comprises the following steps: S1. Place the testing device on the testing platform with a dial indicator; S2, placing the blade (12) on the detection device, so that the lower ends of the upper edge plate (11) and the lower edge plate (10) of the blade (12) are supported on the first supporting pin (2) and the second supporting pin (5), respectively, and the side planes of the upper edge plate (11) and the lower edge plate (10) of the blade (12) are respectively against the positioning plate (4); the rear end of the lower edge plate (10) is against the outer cylindrical surface of the stop pin (6); S3, respectively reading the values ​​of the top surfaces of the upper edge plate (11) and the lower edge plate (10) to be inspected, and calculating the difference between the two readings, which is the actual step difference between the upper and lower edge plates of the blade.

10. A method for detecting the step difference between the upper and lower edge plates of a double-mounting plate blade as claimed in claim 9, characterized in that: In step S3, if the height difference between the upper edge plate (11) and the lower edge plate (10) is greater than the measuring range of the dial indicator, it is necessary to use the dial block (3) to compensate for the step difference between the upper and lower edge plates. The operation method is as follows: the dial block (3) is placed on the detected surface at the top of the upper edge plate (11), and the value of the top surface of the dial block (3) is read by a meter. Then, the value of the top surface of the lower edge plate (10) is read by a meter. The difference between the two meter readings and the thickness of the dial block (3) are calculated to obtain the actual step difference between the upper and lower edge plates of the blade.

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