Device for coordinate measuring of compressor blade length dimensions

Abstract

The application provides a device for compressor blade length size three-coordinate detection, which comprises a plurality of compressor blade clamping units arranged in a matrix mode, and each compressor blade clamping unit mainly comprises positioning round pins, sliding U-shaped pressing blocks and U-shaped positioning limiting blocks. The three positioning round pins are arranged in parallel, one end of the positioning round pin comprises a spherical surface for supporting a side end surface of a compressor blade edge plate blade body; the sliding U-shaped pressing block comprises a first U-shaped notch for pressing a circumferential corner of the compressor blade edge plate; the U-shaped positioning limiting block comprises a second U-shaped notch for pressing the circumferential corner of the compressor blade edge plate; and the spacing between the sliding U-shaped pressing block and the U-shaped positioning limiting block is variable. The device can realize three-coordinate detection of multiple blades clamped at one time, improves the measurement efficiency and reduces the labor intensity of the inspectors.

Description

Technical Field

[0001] This invention belongs to the field of aero-engine component testing technology, specifically relating to a matrix device for coordinate measuring machine (CMM) detection of compressor blade length dimensions. Background Technology

[0002] Compressor blades are core components of aero engines and gas turbines, mainly composed of tenons, rim plates, and blade bodies.

[0003] Currently, in the manufacturing and testing process of compressor blades, specialized tooling is mainly used for testing after the blade rim is machined. Due to the large differences in the length dimensions of each stage of compressor blades and the numerous length dimension factors in each stage, multiple sets of specialized tooling are required during the testing process. This necessitates repeated clamping and positioning, resulting in complex testing steps, high labor intensity, poor versatility, low testing efficiency, and high testing costs. Summary of the Invention

[0004] The present invention aims to provide a device for coordinate measuring machine (CMM) inspection of the length dimension of compressor blades, enabling CMM inspection of multiple blades in a single clamping, thereby improving measurement efficiency and reducing the labor intensity of inspection personnel.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] The device for coordinate measuring machine (CMM) inspection of compressor blade length includes multiple compressor blade clamping units arranged in a matrix. Each compressor blade clamping unit mainly consists of a positioning pin, a sliding U-shaped clamping block, and a U-shaped positioning limit block.

[0007] The three positioning pins are arranged in parallel, and one end of each positioning pin includes a spherical surface for supporting the side end face of the compressor blade rim.

[0008] The sliding U-shaped clamping block includes a first U-shaped groove for clamping the circumferential angle of the compressor blade edge plate;

[0009] The U-shaped positioning and limiting block includes a second U-shaped groove for pressing the circumferential angle of the compressor blade edge plate;

[0010] The distance between the sliding U-shaped clamping block and the U-shaped positioning and limiting block is variable.

[0011] Furthermore, the compressor blade clamping unit also includes support columns. Two support columns are parallel and spaced apart. A sliding U-shaped clamping block is slidably connected to one support column, and a U-shaped positioning and limiting block is fixedly connected to the other support column. The lengths of the two support columns form a space for the vertical placement and support of the compressor blades, and the distance between the two support columns forms a clamping space for the compressor blades.

[0012] Further, a sliding U-shaped pressing block is arranged in the sliding groove, one end of the sliding U-shaped pressing block is connected with the first end of the transmission screw, the threaded segment of the transmission screw is installed in the screw hole of the screw support, and the screw support is fixed on the support column.

[0013] Further, the second end of the transmission screw is connected with a hexagonal locking nut.

[0014] Further, one of the two support columns is connected with one positioning support block, and the other is connected with two positioning support blocks, the positioning support block is provided with a threaded mounting hole, and a positioning round pin is installed in the threaded mounting hole.

[0015] Further, the positioning round pin further comprises external threads on the surface, the positioning round pin is connected with the threaded mounting hole and the hexagonal nut through the external threads, and the hexagonal nut and the spherical surface of the positioning round pin are located on the lower side and the upper side of the positioning support block respectively.

[0016] Further, the lower ends of the two support columns are detachably connected with the base, and the base is detachably connected with the three-coordinate measuring platform.

[0017] Further, the first U-shaped notch is inlaid with a wear-resistant alloy block, the second U-shaped notch is inlaid with brass, and the spherical surface of the positioning round pin has a wear-resistant alloy layer.

[0018] Further, the lower ends of the plurality of matrix-distributed compressor blade clamping units are commonly connected to a bottom plate, and the bottom plate is detachably connected with the three-coordinate measuring platform.

[0019] The present application can realize continuous three-coordinate measurement of multiple compressor blades, solve the repeated clamping problem existing in the existing measurement method, and has the advantages that:

[0020] (1) The measuring device has simple structure, low cost and high measurement efficiency;

[0021] (2) The positioning round pin, the sliding U-shaped pressing block and the U-shaped positioning limiting block are convenient to operate, and the compressor blades can be measured quickly, efficiently and accurately;

[0022] (3) The device has wide application range and can be applied to batch production;

[0023] (4) The device has strong universality and can be applied to blades of multiple sizes (the plurality of compressor blade clamping units on the same bottom plate can clamp compressor blades of different specifications respectively), and different sliding U-shaped pressing blocks and U-shaped positioning limiting blocks can be customized according to the size of the blades. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 is a device structure diagram of the present application;

[0025] Figure 2 is a single unit structure diagram of the compressor blade clamping unit of the present application with clamped blades;

[0026] Figure 3 is a single unit structure diagram of the compressor blade clamping unit of the present application without clamped blades;

[0027] Figure 4 is a front view of the compressor blade clamping unit of the present application;

[0028] Figure 5 is a top view of the compressor blade clamping unit of the present application;

[0029] Figure 6 is a schematic diagram of the first U-shaped groove, the second U-shaped groove, the embedded wear-resistant alloy and brass, and the positioning round pin spherical surface with wear-resistant alloy in the present application;

[0030] Figure 7 is a three-dimensional structure diagram of the device of the present application;

[0031] Figure 8 is a three-dimensional diagram of the single unit of the compressor blade clamping unit of the present application;

[0032] In the figure: 1 - base plate, 2 - handle, 3 - compressor blade clamping unit, 4 - base, 5 - support column, 6 - blade, 7 - positioning support block, 8 - U-shaped positioning limiting block, 9 - countersunk head internal hexagonal screw, 10 - sliding U-shaped compression block, 11 - screw rod support, 12 - transmission screw rod, 13 - hexagonal locking nut, 14 - round pin, 15 - positioning round pin, 16 - hexagonal nut. DETAILED DESCRIPTION

[0033] The present application will be further described below in conjunction with the accompanying drawings and specific embodiments, but should not be understood as limiting the scope of the subject matter described herein to the following embodiments. Any modifications, replacements and changes made according to ordinary technical knowledge and common practice in the art, without departing from the above technical idea of the present application, are included in the scope of the present application.

[0034] As shown in Figures 1-8 , the present application provides a device for matrix type, multi-piece blade continuous three-coordinate measurement of compressor blade length size, which can customize different specifications of U-shaped positioning limiting block 8 and sliding U-shaped compression block 10 according to the geometric structure of the measured blade 6.

[0035] Specifically, the device for measuring the length of the compressor blade in a matrix manner includes a base plate 1, a handle 2, a compressor blade clamping unit 3, a base 4, a support column 5, a blade 6, a positioning block 7, a U-shaped positioning block 8, a countersunk head hexagonal screw 9, a sliding U-shaped compression block 10, a screw rod support 11, a transmission screw rod 12, a hexagonal locking nut 13, a round pin 14, a positioning round pin 15, a hexagonal nut 16, and the like. The above-mentioned length three-coordinate measurement matrix device is fixed on a three-coordinate measurement platform through the locking slot (the slot through the upper and lower end faces of the base plate 1) on the base plate 1, and the handle 2 is fixed on the base plate 1 by the countersunk head hexagonal screw 9 for convenient manual installation.

[0036] The compressor blade clamping unit 3 is distributed in a matrix manner on the upper end face of the base plate 1 and is fixed on the base plate 1 by the countersunk head hexagonal screw 9 and the round pin 14.

[0037] The compressor blade clamping unit 3 includes two parallel and spaced support columns 5, which are fixed and installed on the base 4 by the countersunk head hexagonal screw 9 and the round pin 14.

[0038] The U-shaped positioning block 8 and the positioning block 7 are fixed and installed on the support column 5 by the countersunk head hexagonal screw 9 and the round pin 14.

[0039] The positioning round pin 15 is inserted and installed in the threaded mounting hole of the positioning block 7.

[0040] The sliding U-shaped compression block 10 is installed in the guide rail slot on the upper end of one of the support columns 5 of the compressor blade clamping unit 3.

[0041] The hexagonal locking nut 13 is connected to the transmission screw rod 12, the transmission screw rod 12 is connected to the end of the sliding U-shaped compression block 10 away from the U-shaped slot, the transmission screw rod 12 passes through the threaded hole of the screw rod support 11, the screw rod support 11 is installed on the support column 5, and rotating the hexagonal locking nut 13 can realize the movement of the sliding U-shaped compression block 10 along the guide rail slot.

[0042] During measurement, the length three-coordinate measurement matrix device of the compressor blade is placed on the three-coordinate measurement platform, and then fixed on the three-coordinate measurement platform by the countersunk head hexagonal screw 9 through the locking slot. The compressor blade clamping unit 3 is fixed and installed on the base plate 1 in a matrix manner by the countersunk head hexagonal screw 9 and the round pin 14. The two support columns 5 are fixed and installed on the base 4 by the countersunk head hexagonal screw 9 and the round pin 14, the U-shaped positioning block 8 and the positioning block 7 are fixed and installed on the support column 5 by the countersunk head hexagonal screw 9 and the round pin 14, the surface of the U-shaped slot of the U-shaped positioning block 8 is inlaid with a wear-resistant alloy block for wear resistance and smooth transition processing. The surface of the U-shaped slot of the sliding U-shaped compression block 10 is inlaid with brass.

[0043] Positioning round pin 15 is fixedly installed on positioning support 7, is fastened by internal thread, and can be manually and freely adjusted in height to adapt to different geometric positioning surfaces of the blade. Hexagonal nut 16 is used for locking, and the hemispherical surface of positioning round pin 15 is welded with wear-resistant alloy to play a wear-resistant role.

[0044] U-shaped positioning limiting block 8, sliding U-shaped pressing block 10 and three positioning round pins 15 jointly limit six degrees of freedom, and the positioning is stable. U-shaped positioning limiting block 8 and sliding U-shaped pressing block 10 are clamped at the circumferential corner of the rim plate of the compressor blade, and the spherical surface of the three positioning round pins 15 supports the rim plate and the side surface of the blade from bottom to top.

[0045] Sliding U-shaped pressing block 10 is placed in the guide rail groove at the upper end of support column 5, hexagonal locking nut 13 is connected to transmission screw 12, transmission screw 13 is connected to sliding U-shaped pressing block 10, and sliding U-shaped pressing block 10 is moved along the guide rail groove by rotating the hexagonal locking nut, thereby achieving the function of clamping or loosening blade 6 through screw support 11, which is installed on support column 5 by means of countersunk head internal hexagonal screw 9.

[0046] The measured blade 6 is installed in a multi-station matrix type measuring device, and a plurality of stations are shown in Figs. Figure 1 、 Figure 6 After the installation of the measured blade 6 is completed, the three-coordinate measuring machine measures the measured blades one by one.

[0047] The unexplained parts of the present application are all known technologies of the skilled in the art. Finally, it should be pointed out that the above examples are only used to illustrate the technical solutions of the present application and are not limiting. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced equivalently without departing from the purpose and scope of the technical solutions of the present application, and they should all be covered in the scope of the claims of the present application.

Claims

1. A device for coordinate measuring machine (CMM) detection of compressor blade length, characterized in that: It includes multiple compressor blade clamping units arranged in a matrix, and each compressor blade clamping unit consists of a positioning pin (15), a sliding U-shaped clamping block (10), and a U-shaped positioning limit block (8), wherein: The three positioning pins (15) are arranged in parallel, and one end of the positioning pin (15) includes a spherical surface for supporting the side end face of the compressor blade rim. The sliding U-shaped clamping block (10) includes a first U-shaped groove for clamping the circumferential angle of the compressor blade edge plate; The U-shaped positioning and limiting block (8) includes a second U-shaped groove for pressing the circumferential angle of the compressor blade edge plate; The distance between the sliding U-shaped clamping block (10) and the U-shaped positioning and limiting block (8) is variable; The compressor blade clamping unit also includes a support column (5). The two support columns (5) are parallel and spaced apart. A sliding U-shaped clamping block (10) is slidably connected to one of the support columns (5), and a U-shaped positioning and limiting block (8) is fixedly connected to the other support column (5). The length of the two support columns (5) forms the vertical placement and support space of the compressor blade, and the distance between the two support columns (5) forms the clamping space of the compressor blade. The support column (5) has a sliding groove, and the sliding U-shaped clamping block (10) is placed in the sliding groove. One end of the sliding U-shaped clamping block (10) is connected to the first end of the transmission screw (12). The threaded section of the transmission screw (12) is installed in the screw hole of the screw support (11), and the screw support (11) is fixed on the support column (5).

2. The device for coordinate measuring machine detection of compressor blade length according to claim 1, characterized in that: The second end of the transmission screw (12) is connected to the hexagonal locking nut (13).

3. The device for coordinate measuring machine detection of compressor blade length according to claim 1, characterized in that: One of the two support columns (5) is connected to a positioning block (7), and the other is connected to two positioning blocks (7). The positioning blocks (7) have threaded mounting holes, and positioning pins (15) are installed in the threaded mounting holes.

4. The device for coordinate measuring machine detection of compressor blade length according to claim 3, characterized in that: The positioning pin (15) also includes an external thread on the surface. The positioning pin (15) is connected to the threaded mounting hole and the hexagonal nut (16) through the external thread. The spherical surfaces on the hexagonal nut (16) and the positioning pin (15) are located on the lower and upper sides of the positioning block (7), respectively.

5. The device for coordinate measuring machine detection of compressor blade length according to claim 1, characterized in that: The lower ends of the two supporting columns (5) are detachably connected to the base (4).

6. The device for coordinate measuring machine detection of compressor blade length according to claim 1, characterized in that: The first U-shaped slot is inlaid with a wear-resistant alloy block, the second U-shaped slot is inlaid with brass, and the spherical surface of the positioning pin (15) has a wear-resistant alloy layer.

7. The device for coordinate measuring machine detection of compressor blade length according to claim 1, characterized in that: The lower ends of multiple compressor blade clamping units arranged in a matrix are connected to a base plate (1), which is detachably connected to the coordinate measuring platform.

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