A device and method for detecting a circular arc of a blade edge plate

Abstract

A kind of detection device and detection method of vane edge plate arc, the detection device includes bottom plate and pair of surface block, arc slide, lower arc surface seat and upper arc surface seat;Positioning structure is provided on the bottom plate for installing the blade workpiece to be detected;Pair of surface block is installed on the bottom plate;Upper arc pair of surface and lower arc pair of surface are spaced apart and distributed on the column of pair of surface block;Upper arc pair of surface and lower arc pair of surface are respectively located on the extension arc surface of the upper edge plate measured upper arc surface and lower arc surface theoretical value of blade workpiece to be detected;Arc slide is installed on the bottom plate, and the center of the arc surface of arc slide and the upper edge plate measured upper arc surface or measured lower arc surface of blade workpiece to be detected is coaxially arranged;Dial gauge is respectively provided on lower arc surface seat and upper arc surface seat;Lower arc surface seat and upper arc surface seat can respectively slide on the arc surface of arc slide.This application effectively overcomes the problem that gap error cannot be eliminated in existing measuring device.

Description

Technical Field

[0001] This invention relates to the field of aero-engine blade inspection technology, and in particular to a device and method for detecting the arc of the blade edge plate. Background Technology

[0002] In the field of aero-engine blade manufacturing, blades often have a structure with a large radius and a short arc. During the machining process, these short arc surfaces are mostly machining reference surfaces. Whether the positioning reference on the tooling is accurate will directly affect the machining quality of the product. Therefore, it is necessary to measure the center position and radius of the short arc.

[0003] Existing short circular arc detection devices are shown below. Figure 1 , Figure 2 As shown, it mainly consists of a base plate 1, a dial indicator frame 2, a first positioning block 3, a second positioning block 4, a guide rod 5, a bushing 6, a rotating shaft 7, a bracket 8, a handle 9, a counter gauge block 10, and a dial indicator 11. The testing method is as follows: the blade is placed on the first positioning block 3 and the second positioning block 4, and the dial indicator 11 is mounted on the dial indicator frame 2. The dial indicator frame 2 is connected to the bracket 8 via the guide rod 5, and the bracket 8 is mounted on the rotating shaft 7. The dial indicator frame 2 is rotated around the rotating shaft 7 to the counter gauge block 10, and the dial indicator 11 is zeroed. Then, the dial indicator frame 2 is rotated around the rotating shaft 7 to the short arc surface of the blade edge plate, and the pointer range on the dial indicator 11 is read.

[0004] The disadvantage of this short circular arc detection device is:

[0005] (1) The device uses the axis of the rotating shaft 7 as the measurement reference. The tolerance zone of the short arc measured is small, and the clearance accuracy between the rotating shaft 7 and the bushing 6 is required to be high. The processing and assembly are difficult and the processing cost is high. Moreover, the clearance error between the rotating shaft 7 and the bushing 6 cannot be eliminated, which affects the measurement accuracy.

[0006] (2) Slight wear or deformation of bushing 6, rotating shaft 7 and bracket 8 will cause large measurement errors, resulting in a short service life of the device, high rework frequency, and increased processing costs.

[0007] (3) Because the radius of the short arc being measured is large, the device uses the center of the arc of the short arc surface as the measurement reference, resulting in a large overall volume and mass of the device, a large area occupied, and difficulty in transportation. Summary of the Invention

[0008] The main objective of this invention is to propose a detection device and method for the short arc of blade edge plates, in order to solve the problems of high processing and assembly difficulty, large measurement error, short service life and high processing cost of existing short arc detection devices for blade edge plates.

[0009] To achieve the above objectives, this invention proposes a detection device for the arc of a blade edge plate, comprising a base plate and a counter block, and further comprising an arc slide, a lower arc counter base, and an upper arc counter base; a positioning structure is provided on the base plate for mounting and positioning the blade workpiece to be inspected; the counter block is mounted on the base plate, and the mounting position of the counter block is located on one side of the upper edge plate of the blade workpiece to be inspected; an upper arc counter surface and a lower arc counter surface are provided on the column of the counter block at intervals; the upper arc counter surface... The upper and lower arc surfaces are respectively located on the extended arc surfaces of the theoretical values ​​of the upper and lower arc surfaces of the upper edge plate of the blade workpiece to be inspected; the arc slide is mounted on the base plate, and the side of the arc slide away from the blade workpiece to be inspected is set as an arc surface, which is coaxially set with the center of the upper arc surface or the lower arc surface of the upper edge plate of the blade workpiece to be inspected; a dial indicator is set on the lower arc base and the upper arc base respectively; the lower arc base and the upper arc base can slide along the arc surface on the arc slide respectively.

[0010] Preferably, the lower and upper arc-shaped dial indicator bases each include a slider, a stop pin, and a vertical rod; the bottom surface of the slider slides in contact with the top surface of the arc-shaped dial indicator; two stop pins are spaced apart and installed near the right side of the slider, with the lower end of the stop pin extending beyond the lower end surface of the slider for sliding contact with the arc-shaped surface of the arc-shaped dial indicator; the vertical rod is installed on the top surface of the slider near the left end, and the dial indicator is installed on the vertical rod, with the axis of the dial indicator head perpendicular to the line connecting the centers of the two stop pins.

[0011] Preferably, the positioning structure includes a lower edge plate positioning structure, an upper edge plate positioning structure, and a tenon positioning pin; the lower edge plate positioning structure is used to support and position the lower edge plate of the blade workpiece to be inspected; the upper edge plate positioning structure is used to support and position the upper edge plate of the blade workpiece to be inspected; the tenon positioning pin is inserted into the base plate, and the tenon of the blade workpiece to be inspected abuts against the tenon positioning pin.

[0012] Preferably, the lower edge plate positioning structure includes a lower edge plate short side positioning block and a lower edge plate long side positioning block; the short side of the lower edge plate of the blade workpiece to be inspected is supported on the lower edge plate short side positioning block; the long side of the lower edge plate of the blade workpiece to be inspected abuts against the lower edge plate long side positioning block.

[0013] Preferably, the lower edge plate short side positioning block and the lower edge plate long side positioning block are respectively installed on the base plate using two screws and two positioning pins.

[0014] Preferably, the upper edge plate positioning structure includes an upper edge plate short side positioning block and an upper edge plate long side positioning block; the short side of the upper edge plate of the blade workpiece to be inspected is supported on the upper edge plate short side positioning block; the long side of the upper edge plate of the blade workpiece to be inspected abuts against the upper edge plate long side positioning block.

[0015] Preferably, the upper edge plate short side positioning block and the upper edge plate long side positioning block are respectively installed on the base plate using two screws and two positioning pins.

[0016] Preferably, the dial block and the arc slide are mounted on the base plate by means of two locating pins and multiple screws.

[0017] On the other hand, the present invention also proposes a method for detecting the arc of the blade edge plate, which uses the above-mentioned detection device and includes the following steps:

[0018] Step S1: Place the testing device horizontally on the testing table and install the blade workpiece to be tested on the positioning structure on the base plate;

[0019] Step S2: First, place the lower arc gauge base on the arc slide and slide it along the arc surface to the gauge block to align with the lower arc surface. Then, push the lower arc gauge base to slide along the arc surface to inspect the lower arc surface of the upper edge plate of the blade workpiece.

[0020] Step S3: Remove the lower arc gauge base, then place the upper arc gauge base on the arc slide block, and slide it along the arc surface to the gauge block to align with the upper arc surface. Then push the upper arc gauge base to slide along the arc surface to inspect the upper arc surface of the upper edge plate of the blade workpiece.

[0021] Preferably, during the inspection process in steps S2 and S3, the blade workpiece to be inspected needs to be supported so that the short side of the lower edge plate of the blade workpiece is always supported on the short side positioning block of the lower edge plate, and the long side is always against the long side positioning block of the lower edge plate; the short side of the upper edge plate of the blade workpiece to be inspected is always supported on the short side positioning block of the upper edge plate, and the long side is always against the long side positioning block of the upper edge plate; and the tenon of the blade workpiece to be inspected is always against the tenon positioning pin; when the lower arc gauge base and the upper arc gauge base slide, the outer peripheral surface of the stop pin is always in close contact with the arc surface of the arc slide.

[0022] Due to the adoption of the above technical solution, the beneficial effects of the present invention are as follows:

[0023] (1) In this invention, by setting an arc-shaped slide block, and on the arc-shaped slide block, an arc-shaped surface coaxial with the center of the upper arc surface to be measured or the lower arc surface to be measured of the upper edge plate of the blade workpiece to be inspected is provided. Using this arc-shaped surface as a measurement reference, the lower arc-shaped gauge block and the upper arc-shaped gauge block are slid on the measurement reference to complete the detection of the upper arc surface to be measured and the lower arc surface to be measured of the upper edge plate. The operation is simple, there is no gap error, and the measurement accuracy is high. It effectively overcomes the problem that the gap error of the existing measuring device cannot be eliminated.

[0024] (2) In this invention, the lower edge plate long side positioning block, lower edge plate short side positioning block, upper edge plate short side positioning block, and upper edge plate long side positioning block form supports and positions for the lower edge plate and upper edge plate of the blade workpiece to be inspected, respectively. The tenon positioning pin abuts against the tenon of the blade workpiece to be inspected, thus ensuring complete positioning of the entire blade workpiece. The positioning structure adopted in this invention facilitates the installation and positioning of the blade workpiece to be inspected and is simple to operate.

[0025] (3) In the positioning structure used in this invention, the positioning surfaces on each positioning block are planar structures, which are simple and convenient to process.

[0026] (4) In this invention, the wear is mainly between the arc slide and the lower arc gauge base and the upper arc gauge base. As long as the arc surface on the arc slide is concentric and coaxial with the short arc being measured, the wear between the arc slide and the lower arc gauge base and the upper arc gauge base has little impact on the measurement results, which increases the service life of the device and reduces the processing cost. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0028] Figure 1 This is a front view of a detection device in the prior art;

[0029] Figure 2 This is a top view of a detection device in the prior art;

[0030] Figure 3 This is a front view of the detection device provided by the present invention;

[0031] Figure 4 This is a top view of the detection device provided by the present invention;

[0032] Figure 5 This is a top view of the table block in this invention;

[0033] Figure 6 for Figure 5 S-shaped view;

[0034] Figure 7 This is a front view of the structure of the lower or upper arc-shaped dial base in this invention;

[0035] Figure 8 This is a top view of the structure of the lower or upper arc-shaped dial base in this invention;

[0036] Explanation of reference numerals: 1. Base plate; 2. Dial indicator holder; 3. First positioning block; 4. Second positioning block; 5. Guide rod; 6. Bushing; 7. Rotating shaft; 8. Bracket; 9. Handle; 10. Alignment block; 11. Dial indicator; 2a. Lower edge plate long side positioning block; 3a. Lower edge plate short side positioning block; 4a. Blade to be inspected; 5a. Upper edge plate short side positioning block; 6a. Upper edge plate long side positioning block; 7a. Lower arc dial indicator base; 8a. Arc slide; 8b. Arc surface; 9a. Upper arc dial indicator base; 10a. Upper arc alignment surface; 10b. Lower arc alignment surface; 11a. Tenon positioning pin; 12. Vertical rod; 13. Slider; 14. Stop pin; 16. Lower edge plate positioning structure; 17. Upper edge plate positioning structure. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0038] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0039] Furthermore, the use of terms such as "first" and "second" in this invention is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0040] On the one hand, this embodiment provides a device for detecting the arc of a blade edge plate, combined with Figures 3 to 8The diagram shows a schematic of the detection device for the arc of a blade edge plate provided by the present invention. The detection device includes a base plate 1 and a counter plate 10, as well as an arc slide 8a, a lower arc counter plate 7a, and an upper arc counter plate 9a. A positioning structure is provided on the base plate 1 for mounting and positioning the blade workpiece 4a to be inspected. The counter plate 10 is mounted on the base plate 1, and its mounting position is located on one side of the upper edge plate of the blade workpiece 4a to be inspected. An upper arc counter surface 10a and a lower arc counter surface 10b are provided on the column of the counter plate 10, spaced apart vertically. The upper arc counter surface 10a... The lower arc surface 10b is located on the extended arc surface of the theoretical value of the upper arc surface and the lower arc surface of the upper edge plate of the blade workpiece 4a to be inspected, respectively; the arc slide 8a is installed on the base plate 1, and the side of the arc slide 8a away from the blade workpiece 4a to be inspected is set as an arc surface 8b, which is coaxially set with the center of the upper arc surface or the lower arc surface of the upper edge plate of the blade workpiece 4a to be inspected; a dial indicator 11 is respectively set on the lower arc gauge base 7a and the upper arc gauge base 9a; the lower arc gauge base 7a and the upper arc gauge base 9a can slide along the arc surface 8b on the arc slide 8a.

[0041] Combination Figure 7 , Figure 8 As shown, the lower arc-shaped dial indicator base 7a and the upper arc-shaped dial indicator base 9a respectively include a slider 13, a stop pin 14, and a vertical rod 12; the bottom surface of the slider 13 slides in contact with the top surface of the arc-shaped dial indicator 8a; two stop pins 14 are spaced apart and installed near the right side of the slider 13, and the lower end of the stop pin 14 extends out of the lower end surface of the slider 13 to slide in contact with the arc surface 8b of the arc-shaped dial indicator 8a; the vertical rod 12 is installed near the left end of the top surface of the slider 13, and the dial indicator 11 is installed on the vertical rod 12, and the axial direction of the dial indicator 11 is perpendicular to the line connecting the centers of the two stop pins 14. During testing, the slider 13 slides on the top surface of the arc-shaped dial indicator 8a, and the outer circumferential surface of the stop pin (14) is in close contact with the arc surface 8b of the arc-shaped dial indicator 8a. Since the axis of the dial indicator 11 is perpendicular to the line connecting the centers of the two stop pins 14, the dial indicator 11 can always be perpendicular to the measured arc of the blade workpiece 4a under inspection.

[0042] Combination Figure 3 , Figure 4As shown, the positioning structure includes a lower edge plate positioning structure 16, an upper edge plate positioning structure 17, and a tenon positioning pin 11a. The lower edge plate positioning structure 16 is used to support and position the lower edge plate of the blade workpiece 4a to be inspected. The upper edge plate positioning structure 17 is used to support and position the upper edge plate of the blade workpiece 4a to be inspected. The tenon positioning pin 11a is inserted into the base plate 1, and the tenon of the blade workpiece 4a to be inspected abuts against the tenon positioning pin 11a. Specifically, the lower edge plate positioning structure 16 includes a lower edge plate short side positioning block 3a and a lower edge plate long side positioning block 2a. The short side of the lower edge plate of the blade workpiece 4a to be inspected is supported on the lower edge plate short side positioning block 3a. The long side of the lower edge plate of the blade workpiece 4a to be inspected abuts against the lower edge plate long side positioning block 2a. The lower edge plate short side positioning block 3a and the lower edge plate long side positioning block 2a are respectively installed on the base plate 1 using two screws and two positioning pins. The upper edge plate positioning structure 17 includes an upper edge plate short side positioning block 5a and an upper edge plate long side positioning block 6a; the short side of the upper edge plate of the blade workpiece 4a to be inspected is supported on the upper edge plate short side positioning block 5a; the long side of the upper edge plate of the blade workpiece 4a to be inspected abuts against the upper edge plate long side positioning block 6a. The upper edge plate short side positioning block 5a and the upper edge plate long side positioning block 6a are respectively installed on the base plate 1 by means of two screws and two positioning pins.

[0043] In this embodiment, the dial indicator block 10 and the arc-shaped slide block 8a are respectively mounted on the base plate using two locating pins and multiple screws. Using locating pins and screws for installation facilitates positioning and makes installation convenient and simple.

[0044] On the other hand, this embodiment also provides a method for detecting the arc of the blade edge plate, which uses the above-mentioned detection device and includes the following steps:

[0045] Step S1: Place the testing device horizontally on the testing table and install the blade workpiece 4a to be tested on the positioning structure on the base plate 1;

[0046] Step S2: First, place the lower arc gauge base 7a on the arc slide block 8a and slide it along the arc surface 8b to the gauge block 10 to align with the lower arc surface 10b. Then, push the lower arc gauge base 7a to slide along the arc surface 8b to inspect the lower arc surface of the upper edge plate of the blade workpiece 4a to be inspected.

[0047] Step S3: Remove the lower arc gauge base 7a, then place the upper arc gauge base 9a on the arc slide block 8a, and slide it along the arc surface 8b to the gauge block 10 to align with the upper arc surface 10a. Then push the upper arc gauge base 9a to slide along the arc surface 8b to inspect the upper arc surface of the upper edge plate of the blade workpiece 4a to be inspected.

[0048] During the inspection process in steps S2 and S3, the blade workpiece 4a to be inspected needs to be supported so that the short side of the lower edge plate of the blade workpiece 4a is always supported on the lower edge plate short side positioning block 3a, and the long side is always against the lower edge plate long side positioning block 2a; the short side of the upper edge plate of the blade workpiece 4a is always supported on the upper edge plate short side positioning block 5a, and the long side is always against the upper edge plate long side positioning block 6a; and the tenon of the blade workpiece 4a is always against the tenon positioning pin 11a; when the lower arc gauge seat 7a and the upper arc gauge seat 9a slide, the outer peripheral surface of the stop pin 14 is always close to the arc surface 8b of the arc slide seat 8a.

[0049] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A device for detecting the arc of a blade edge plate, comprising a base plate (1) and a counter block (10), characterized in that: It also includes an arc-shaped slide (8a), a lower arc-shaped dial base (7a), and an upper arc-shaped dial base (9a); A positioning structure is provided on the base plate (1) for mounting the blade workpiece (4a) to be inspected and positioning it; The dial indicator block (10) is mounted on the base plate (1), and the mounting position of the dial indicator block (10) is located on one side of the upper edge plate of the blade workpiece (4a) to be inspected. An upper circular arc surface (10a) and a lower circular arc surface (10b) are provided on the column of the counter block (10) at intervals. The upper circular arc surface (10a) and the lower circular arc surface (10b) are respectively located on the extended circular arc surface of the upper edge plate of the blade workpiece (4a) to be tested, which is the theoretical value of the upper and lower circular arc surfaces to be tested. The arc slide (8a) is mounted on the base plate (1), and the side of the arc slide (8a) away from the blade workpiece (4a) to be inspected is set as an arc surface (8b). The arc surface (8b) is coaxially set with the center of the upper arc surface to be measured or the lower arc surface to be measured of the upper edge plate of the blade workpiece (4a) to be inspected. A dial indicator (11) is installed on the lower arc gauge base (7a) and the upper arc gauge base (9a), respectively. The lower arc dial base (7a) and the upper arc dial base (9a) can slide along the arc surface (8b) on the arc slide (8a); The positioning structure includes a lower edge plate positioning structure (16), an upper edge plate positioning structure (17), and a tenon positioning pin (11a). The lower edge plate positioning structure (16) is used to support and position the lower edge plate of the blade workpiece (4a) to be inspected; The upper edge plate positioning structure (17) is used to support and position the upper edge plate of the blade workpiece (4a) to be inspected; The tenon positioning pin (11a) is inserted on the base plate (1), and the tenon of the blade workpiece (4a) to be inspected abuts against the tenon positioning pin (11a); The lower edge plate positioning structure (16) includes a lower edge plate short side positioning block (3a) and a lower edge plate long side positioning block (2a). The short side of the lower edge plate of the blade workpiece (4a) to be inspected is supported on the short side positioning block (3a) of the lower edge plate; The long side of the lower edge plate of the blade workpiece (4a) to be inspected abuts against the long side positioning block (2a) of the lower edge plate; The upper edge plate positioning structure (17) includes an upper edge plate short side positioning block (5a) and an upper edge plate long side positioning block (6a). The short side of the upper edge plate of the blade workpiece (4a) to be inspected is supported on the short side positioning block (5a) of the upper edge plate; The long side of the upper edge plate of the blade workpiece (4a) to be inspected abuts against the long side positioning block (6a) of the upper edge plate.

2. The detection device as described in claim 1, characterized in that: The lower arc dial base (7a) and the upper arc dial base (9a) respectively include a slider (13), a stop pin (14) and a vertical rod (12). The bottom surface of the slider (13) slides in contact with the top surface of the arc-shaped slide block (8a); Two stop pins (14) are installed at intervals on the right side of the slider (13), and the lower end of the stop pin (14) extends out of the lower end face of the slider (13) for sliding engagement with the arc surface (8b) of the arc slide block (8a); The upright (12) is installed on the top surface of the slider (13) near the left end. The dial indicator (11) is installed on the upright (12), and the axis of the dial indicator (11) is perpendicular to the line connecting the centers of the two stop pins (14).

3. The detection device as described in claim 1, characterized in that: The lower edge plate short side positioning block (3a) and the lower edge plate long side positioning block (2a) are respectively installed on the base plate (1) by two screws and two positioning pins.

4. The detection device as described in claim 1, characterized in that: The upper edge plate short side positioning block (5a) and upper edge plate long side positioning block (6a) are respectively installed on the base plate (1) by two screws and two positioning pins.

5. The detection device as described in claim 1, characterized in that: The dial block (10) and the arc slide (8a) are respectively mounted on the base plate (1) by two positioning pins and multiple screws.

6. A method for detecting the arc of a blade edge plate, characterized in that, The detection apparatus according to any one of claims 1 to 5 comprises the following steps: Step S1: Place the testing device horizontally on the testing table and install the blade workpiece (4a) to be tested on the positioning structure on the base plate (1); Step S2: First, place the lower arc gauge base (7a) on the arc slide (8a) and slide it along the arc surface (8b) to the gauge block (10) to align with the lower arc surface (10b). Then, push the lower arc gauge base (7a) along the arc surface (8b) to slide and inspect the lower arc surface of the upper edge plate of the blade workpiece (4a) to be inspected. Step S3: Remove the lower arc gauge base (7a), then place the upper arc gauge base (9a) on the arc slide (8a), and slide it along the arc surface (8b) to the gauge block (10) to align with the upper arc surface (10a). Then push the upper arc gauge base (9a) along the arc surface (8b) to inspect the upper arc surface of the upper edge plate of the blade workpiece (4a). During the inspection process in steps S2 and S3, the blade workpiece (4a) to be inspected needs to be supported so that the short side of the lower edge plate of the blade workpiece (4a) is always supported on the lower edge plate short side positioning block (3a) and the long side is always against the lower edge plate long side positioning block (2a); the short side of the upper edge plate of the blade workpiece (4a) to be inspected is always supported on the upper edge plate short side positioning block (5a) and the long side is always against the upper edge plate long side positioning block (6a); and the tenon of the blade workpiece (4a) to be inspected is always against the tenon positioning pin (11a); when the lower arc gauge base (7a) and the upper arc gauge base (9a) slide, the outer circumferential surface of the stop pin (14) is always close to the arc surface (8b) of the arc slide base (8a).

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