Blade reference block universal clamping tool and eddy current nondestructive testing automatic detection method

Abstract

The invention discloses a blade reference block universal clamping tool and an eddy current nondestructive testing automatic detection method.The universal clamping tool comprises clamping blocks, fixing screws and a fixing base, the upper end face of the fixing base is provided with a plurality of clamping block insertion openings, the lower end face of the fixing base is fixed to a plane, the clamping blocks are inserted into the clamping block insertion openings, and the clamping blocks are fixed to the clamping block insertion openings; a blade tenon clamping groove is formed in the upper end face of the clamping block, a screw hole is formed in the lower end face of the clamping block, the screw hole penetrates through the groove bottom face of the blade tenon clamping groove and then is communicated with the blade tenon clamping groove, and the fixing screw is installed in the screw hole. By the adoption of the clamping tool, accurate fixing of the blade reference blocks used for probe calibration in the automatic eddy current testing process can be achieved, repeatability of probe calibration results is guaranteed, meanwhile, rapid replacement of different blade reference blocks is met, certain universality is achieved, and the working efficiency is improved. The fixing problem of different types of blade reference blocks in the automatic eddy current testing process is well solved.

Description

Technical Field

[0001] The invention belongs to the technical field of automatic eddy current nondestructive testing, and in particular is a universal blade comparison test block clamping tool and an eddy current nondestructive testing automated testing method. Background Art

[0002] With the development of automated testing technology, the scope of application of eddy current testing automation is becoming more and more extensive, and the automated testing method of eddy current non-destructive testing is gradually replacing manual scanning. During the eddy current testing process, the probe needs to be calibrated on the comparison test block. Conventional fixing methods cannot ensure that the comparison test block is installed in the same position each time, which leads to the need to check or re-edit the calibration scanning program before testing, which greatly affects the testing efficiency. At the same time, during the probe calibration process, once the comparison test block becomes loose, the accuracy of the calibration result cannot be guaranteed, which may cause inconsistent evaluation criteria for each test.

[0003] The existing automatic eddy current test block clamping fixture is only designed for standard rectangular test blocks, which is no longer suitable for the requirements of diversity of eddy current testing blade comparison test blocks. Summary of the invention

[0004] The present invention aims to design a universal clamping tool for blade comparison test blocks and an automated eddy current nondestructive testing method, so as to achieve accurate fixation of the blade comparison test blocks used for probe calibration during automatic eddy current testing, ensure the repeatability of the probe calibration results, and at the same time meet the requirements of rapid replacement between different blade comparison test blocks. The method has certain versatility and well solves the problem of fixing different types of blade comparison test blocks during automatic eddy current testing.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] A universal clamping tool for blade comparison test blocks, comprising:

[0007] A fixed base, wherein the upper end surface of the fixed base is provided with a plurality of clamping block sockets, and the lower end surface of the fixed base is fixed on a plane;

[0008] A clamping block, wherein the clamping block is inserted into the clamping block socket, the upper end surface of the clamping block is provided with a blade tenon slot, and the lower end surface of the clamping block is provided with a screw hole, which passes through the bottom surface of the blade tenon slot and is communicated with the blade tenon slot;

[0009] A fixing screw is installed in the screw hole.

[0010] As an option, the universal blade reference block holder also includes:

[0011] A tapered hole, wherein the tapered hole is formed on the lower end surface of the fixed base, and an end of the tapered hole with a smaller diameter is located on the lower end surface;

[0012] The limiting protrusion is located on the lower end surface of the fixed base and protrudes in a direction away from the lower end surface.

[0013] Furthermore, every two of the tapered holes and one of the limiting protrusions form a group, and the limiting protrusion is located between the two tapered holes.

[0014] Furthermore, the fixing screw comprises a threaded section and a smooth section, and the smooth section is located at the end of the fixing screw.

[0015] Furthermore, the plurality of clamping block sockets are all cubic grooves of the same size, the plurality of clamping blocks are all cubic blocks of the same size, and the blade tenon slots on different clamping blocks have different sizes.

[0016] Furthermore, the depth of the clamping block socket is equal to half of the height of the clamping block.

[0017] Furthermore, four parallel edges of the clamping block in the height direction are chamfered.

[0018] Furthermore, the screw hole is a stepped hole, including a threaded hole with a smaller aperture and a smooth hole with a larger aperture, wherein the opening of the smooth hole is located at the lower end surface of the clamping block, and the opening of the threaded hole is located at the bottom surface of the blade tenon slot.

[0019] The automated testing method for eddy current nondestructive testing includes fixing of a comparison test block, preparation and calibration of a calibration scanning program, using the aforementioned universal clamping fixture, and includes:

[0020] The fixed base is fixedly installed on the workbench plane within the travel range of the eddy current non-destructive testing robot arm, and blades of different specifications are assembled with clamping blocks with blade tenons of different specifications, and then inserted into the different clamping block sockets of the fixed base, and the corresponding relationship between the blade specifications and the positions of the clamping block sockets is recorded, and then the calibration scanning program is compiled, and the movement path of the robot arm during the calibration scanning is planned, and all the clamping blocks are taken out, and the next batch of blades of different specifications are replaced, and the above process is repeated again until the calibration scanning program of all specifications of blades is completed;

[0021] During calibration, select blades of corresponding specifications and install them on the clamping block. Place the clamping block into the corresponding clamping block socket according to the correspondence between the blade specifications and the clamping block socket positions recorded when the calibration scanning program was compiled. Start the compiled calibration scanning program and perform a calibration scan on the blades of this specification.

[0022] Compared with the prior art, the present invention has the following advantages:

[0023] 1. The present invention can ensure the accuracy and stability of the fixation of the comparison test block during the calibration of the automated eddy current detection probe, reduce the risk of the comparison test block loosening or falling off, avoid the situation where the evaluation standard is inconsistent due to the instability of the comparison test block during the probe calibration process, and improve the reliability and stability of the entire automated system.

[0024] 2. The present invention can make the replacement of the comparison test block more convenient and time-saving. The user can easily disassemble and install it without professional skills or complicated tools. At the same time, the comparison test block can be ensured to be in the same position after replacement, saving the time of re-checking or re-programming the probe calibration scanning program.

[0025] 3. The present invention can effectively control the cost, which is relatively low compared to the required cost. Due to its simplicity and versatility, the manufacturing and maintenance costs can be effectively controlled.

[0026] 4. The present invention can provide ideas for the design of clamping tooling structures for other types of automated non-destructive testing, thereby improving the degree of automation of non-destructive testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the universal clamping fixture for blade comparison test blocks;

[0028] Figure 2 It is a schematic diagram of the clamping block and fixing screws;

[0029] Figure 3 It is a schematic diagram of the blade tenon, clamping block and fixing screw structure;

[0030] Figure 4 It is a schematic diagram of the installation of the blade tenon and the clamping block;

[0031] Figure 5 It is a schematic diagram of the fixed base structure;

[0032] In the figure: 1-clamping block, 2-fixing screw, 3-fixing base, 4-blade tenon slot, 5-screw hole, 6-blade tenon, 7-smooth section, 8-clamping block socket, 9-taper hole, 10-limiting protrusion. DETAILED DESCRIPTION

[0033] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments, but it should not be understood that the scope of the subject matter described in the present invention is limited to the following embodiments. Without departing from the above-mentioned technical ideas of the present invention, various modifications, substitutions and changes made according to the common technical knowledge and customary means in the field are included in the scope of the present invention.

[0034] like Figure 1 to Figure 5 As shown, the universal clamping tool for the blade comparison test block includes a clamping block 1, a fixing screw 2 and a fixing base 3.

[0035] The clamping block 1 is made by machining a blade tenon groove 4 on the top of the block and punching a screw hole 5 in the middle. The blade tenon groove 4 is used for inserting the blade tenon 6, and the screw hole 5 is used for tapping the fixing screw 2. The four sides of the clamping block 1 are chamfered to ensure that the air below is discharged when inserted into the fixed base 3.

[0036] The blade tenon slot 4 at the top of the clamping block 1 can be customized according to the structure of the comparison test block used. The clamping block 1 and the fixed base 3 are installed and limited through the clamping block socket, which can achieve rapid replacement and accurate and reliable positioning.

[0037] The smooth section 7 at the end of the fixing screw 2 contacts the bottom end of the blade tenon 6 of the comparison test block (blade) to ensure the stability of the comparison test block when it is fixed. The threaded section is responsible for preventing the fixing screw 2 from falling off.

[0038] The upper end surface of the fixed base 3 is processed with multiple clamping block sockets 8, the depth of the clamping block sockets 8 is half the height of the clamping block 1, and the clamping block 1 can be integrally embedded in the clamping block sockets 8 of the fixed base 3. Four tapered holes 9 are opened on the bottom surface of the fixed base 3, and screws are tapped into the tapered holes 9 to fix it on the plane of the mounting frame or workbench (the plane here refers to any stable and reliable plane within the range that the eddy current detection robot arm can cover) to limit the displacement of the fixed base 3 in the upper and lower directions. The bottom surface of the fixed base 3 is processed with two limit protrusions 10, which are inserted into the openings or slots on the plane on which it is placed, thereby greatly limiting the sliding displacement of the fixed base 3.

[0039] Before performing the eddy current nondestructive testing of the blades, the fixed base 3 is first fixedly installed on the workbench plane within the travel range of the eddy current nondestructive testing robot arm, and blades of different specifications are assembled with the clamping blocks 1 with blade tenon slots 4 of different specifications, and then inserted into the different clamping block sockets 8 of the fixed base 3, and the corresponding relationship between the blade specifications and the positions of the clamping block sockets 8 is recorded, for example Figure 1 The fixed base 3 has 6 clamping block sockets 8, which are recorded as 1#, 2#, 3#, 4#, 5#, and 6# respectively. The corresponding blade specifications are a, b, c, d, e, and f respectively, so the corresponding relationships are 1#-a, 2#-b, 3#-c, 4#-d, 5#-e, and 6#-f respectively. Then, the calibration scanning program is compiled, and the calibration scanning program names correspond to 1#-a, 2#-b, 3#-c, 4#-d, 5#-e, and 6#-f. The movement path of the robot arm during the calibration scanning is planned, all clamping blocks 1 are taken out, and the next batch of blades of different specifications are replaced. The above process is repeated again until the calibration scanning program compilation of all specifications of blades is completed.

[0040] In the process of automatic eddy current nondestructive testing of blades, when the eddy current probe needs to be calibrated, a blade of corresponding specifications is selected and installed on the clamping block 1. According to the correspondence between the blade specifications and the position of the clamping block socket 8 recorded when the calibration scanning program is compiled, the clamping block 1 is placed in the corresponding clamping block socket 8, and the compiled calibration scanning program is started to calibrate the blade of the specification. For example, if a blade of specification a needs to be calibrated, then a blade of specification a is found and installed on the clamping block 1, and then the 1# clamping block socket 8 is inserted, and the calibration scanning program 1#-a is immediately started. When the blade specification to be calibrated is not in the fixed base 3, the blade of corresponding specifications and the position correspondence when the scanning program is compiled are found, and the comparison test block in the corresponding clamping block socket 8 is directly taken out and placed in it to start calibration. Since the clamping block 1 can accurately fix the comparison test block (blade), and the clamping block 1 can be accurately positioned in the clamping block socket 8, and the installation position of the fixed base 3 remains unchanged, the compiled scanning program can run normally, and the entire calibration process is easy and fast.

[0041] The contents not described in detail in the specification of the present invention belong to the prior art known to the professional and technical personnel in the field. Although the illustrative specific embodiments of the present invention are described above to facilitate the understanding of the present invention by the technical personnel in the field, it should be clear that the present invention is not limited to the scope of the specific embodiments. For ordinary technicians in the field of this technology, as long as various changes are within the spirit and scope of the present invention defined and determined by the attached claims, these changes are obvious, and all inventions and creations using the concept of the present invention are protected.

Claims

1. A universal clamping tool for blade comparison test blocks, characterized in that: include: A fixed base (3), wherein the upper end surface of the fixed base (3) is provided with a plurality of clamping block sockets (8), and the lower end surface of the fixed base (3) is fixed on a plane; A clamping block (1), wherein the clamping block (1) is inserted into a clamping block socket (8), the upper end surface of the clamping block (1) is provided with a blade tenon slot (4), the lower end surface of the clamping block (1) is provided with a screw hole (5), the screw hole (5) penetrates the bottom surface of the blade tenon slot (4) and is communicated with the blade tenon slot (4); A fixing screw (2), wherein the fixing screw (2) is installed in the screw hole (5).

2. A blade comparison test block universal clamping tool according to claim 1, characterized in that: Also includes: A tapered hole (9), wherein the tapered hole (9) is formed on the lower end surface of the fixed base (3), and an end of the tapered hole (9) with a smaller diameter is located on the lower end surface; A limiting protrusion (10), wherein the limiting protrusion (10) is located on the lower end surface of the fixed base (3) and protrudes in a direction away from the lower end surface.

3. The blade comparison test block universal clamping tool according to claim 2, characterized in that: Every two of the tapered holes (9) and one of the limiting protrusions (10) form a group, and the limiting protrusion (10) is located between the two tapered holes (9).

4. The blade comparison test block universal clamping tool according to claim 1, characterized in that: The fixing screw (2) comprises a threaded section and a smooth section (7), and the smooth section (7) is located at the end of the fixing screw (2).

5. The blade comparison test block universal clamping tool according to claim 1, characterized in that: The plurality of clamping block sockets (8) are all cubic grooves of the same size, the plurality of clamping blocks (1) are all cubic blocks of the same size, and the blade tenon slots (4) on different clamping blocks (1) have different sizes.

6. The universal clamping tool for blade comparison test block according to claim 5, characterized in that: The depth of the clamping block socket (8) is equal to half the height of the clamping block (1).

7. The blade comparison test block universal clamping tool according to claim 5, characterized in that: The four parallel edges of the clamping block (1) in the height direction are chamfered.

8. The blade comparison test block universal clamping tool according to claim 1, characterized in that: The screw hole (5) is a stepped hole, comprising a threaded hole with a smaller aperture and a smooth hole with a larger aperture, wherein the opening of the smooth hole is located at the lower end surface of the clamping block (1), and the opening of the threaded hole is located at the bottom surface of the blade tenon slot (4).

9. An automated eddy current nondestructive testing method, including fixing of a comparison test block, preparation and calibration of a calibration scanning program, characterized in that: The universal clamping tool according to claim 1 is used, and comprises: The fixed base (3) is fixedly mounted on a workbench plane within the travel range of the eddy current non-destructive testing robot arm, blades of different specifications are assembled with the clamping blocks (1) with the blade tenon slots (4) of different specifications, and then inserted into the different clamping block sockets (8) of the fixed base (3), and the corresponding relationship between the blade specifications and the positions of the clamping block sockets (8) is recorded, and then a calibration scanning program is compiled, and the movement path of the robot arm during the calibration scanning is planned, and all the clamping blocks (1) are taken out, and the next batch of blades of different specifications are replaced, and the above process is repeated again until the calibration scanning program compilation of blades of all specifications is completed; During calibration, a blade of corresponding specifications is selected and mounted on the clamping block (1). According to the correspondence between the blade specifications and the positions of the clamping block sockets (8) recorded when the calibration scanning program is compiled, the clamping block (1) is placed in the corresponding clamping block socket (8). The compiled calibration scanning program is started to perform a calibration scan on the blade of the corresponding specification.

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