A flexible fixture for industrial CT inspection

Abstract

The utility model provides a kind of flexible clamp for industrial CT detection, including base and multiple flexible clamp components;Each flexible clamp component includes flexible clamp body and mounting seat, and flexible clamp body includes vertical cylindrical shell and several elastic support rods;Shell includes upper carbon fiber guide sleeve and lower locking seat, and elastic support rod includes upper carbon fiber section and lower metal section, and the upper end of carbon fiber section extends to the outside of carbon fiber guide sleeve, and the lower end of metal section extends into locking seat, and locking device is arranged on the side wall of locking seat.The utility model provides a kind of flexible clamp for industrial CT detection, can meet the sample clamping detection demand of different shape, improve the compatibility and versatility of clamp, and also can avoid damaging sample surface;At the same time, carbon fiber material can avoid scattering artifact in X-ray scanning process, so as to ensure image reconstruction quality and precision.

Description

Technical Field

[0001] This utility model belongs to the field of tooling and fixture technology, specifically relating to a flexible fixture for industrial CT inspection. Background Technology

[0002] Industrial Computed Tomography (ICT), a core technology in the field of nondestructive testing, was developed due to the rigid demand for internal defect detection in the manufacturing industry. ICT equipment mainly consists of an X-ray source, detector, motion platform, high-precision sample scanning turntable, fully shielded real-time observation lead room, computer system, electrical control system, and image acquisition and reconstruction analysis software. It can be used for material analysis, simulation, defect analysis, battery analysis, reverse engineering, and structural measurement and defect detection in lithium batteries, die castings, automotive parts, 3D printing, and scientific research. It can perform three-dimensional scanning of samples ranging from small pieces to large sizes, observing the internal structure of samples through post-scan reconstruction without damaging the sample. It can analyze and perform special tests on different samples, such as porosity / inclusion distribution and size, cracks, and defects, and can also perform three-dimensional dimensional measurements on the tested samples.

[0003] As high-end industries such as aerospace and precision electronics raise their requirements for component quality, the requirements for the detection accuracy and efficiency of industrial CT inspection equipment are also increasing. The detection accuracy and efficiency are closely related to the sample fixture structure.

[0004] In existing technologies, sample clamps used for industrial CT inspection are usually rigid clamps made of metal, such as pneumatic clamps and hydraulic clamps. These clamps have the following disadvantages and deficiencies: 1. Rigid clamping causes artifacts: Metal clamps will produce scattering artifacts in X-ray scanning, affecting the quality and accuracy of image reconstruction; 2. Poor adaptability to complex workpieces: Existing pneumatic / hydraulic clamps are only suitable for regular geometries. Irregularly shaped parts require customized design, which is time-consuming and costly; 3. Risk of micro-damage: High-density alloy clamps may damage thin-walled workpieces.

[0005] Therefore, there is an urgent need for a flexible fixture that does not produce scattering artifacts, has strong compatibility, and is not easily damaged by samples, in order to improve detection accuracy and efficiency and reduce clamping costs. Summary of the Invention

[0006] This invention provides a flexible fixture for industrial CT inspection, which can solve the problems of scattering artifacts, poor compatibility, and easy damage to samples caused by existing sample fixtures used for industrial CT inspection.

[0007] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is a flexible fixture for industrial CT inspection, comprising: The base has a connection structure formed thereon for coaxial connection with the turntable of industrial CT inspection equipment; Multiple flexible clamping assemblies are spaced apart on the base; each flexible clamping assembly includes a flexible clamping body and a mounting base, the mounting base being mounted on the base and the flexible clamping body being mounted on the mounting base; the flexible clamping body includes a vertically cylindrical housing and a plurality of vertically retractable elastic support rods disposed within the housing; the housing includes an upper carbon fiber guide sleeve and a lower locking seat, the elastic support rod includes an upper carbon fiber segment and a lower metal segment, the upper end of the carbon fiber segment extending outside the carbon fiber guide sleeve, the lower end of the metal segment extending into the locking seat, and a locking device for locking the elastic support rod is provided on the side wall of the locking seat.

[0008] The technical solution of this utility model also includes the following additional technical features: The locking seat is a metal cylinder, which is coaxially arranged with the carbon fiber guide sleeve and connected to the lower end of the carbon fiber guide sleeve. A limiting plate is fixed inside the locking seat, and through holes corresponding to the elastic support rods are formed on the limiting plate. The metal segment includes an upper large-diameter segment and a lower small-diameter segment. The small-diameter segment passes through the through hole, and a spring is sleeved on the small-diameter segment between the limiting plate and the large-diameter segment.

[0009] Adjacent large-diameter segments are in contact with each other; The locking device locks the locking screw and the locking block. The locking seat has a horizontal threaded hole that engages with the locking screw. The locking screw is installed in conjunction with the horizontal threaded hole. The locking block is horizontally slidably disposed between the large-diameter section and the locking screw, and is threadedly engaged with the locking screw. By rotating the locking screw, the locking block is moved to slide horizontally and squeeze the large-diameter section to lock the elastic support rod or disengage from the large-diameter section to unlock the elastic support rod.

[0010] The locking block is an arc-shaped block that semi-encloses the outer side of the large-diameter section of several elastic support rods.

[0011] Each of the flexible clamping components further includes a heightening block for mounting between the locking seat and the mounting seat, and is detachably connected to both the locking seat and the mounting seat.

[0012] The base is provided with a plurality of mounting holes arranged in an array, and the mounting seat is provided with a waist hole. The mounting seat and the base are connected by a locking knob passing through the waist hole and threadedly engaging with one of the mounting holes.

[0013] The connection structure includes a positioning plate and fasteners. The positioning plate is located at the center of the bottom surface of the base and is coaxial with the base. The positioning plate protrudes downward relative to the bottom surface of the base. Both the center of the base and the center of the positioning plate have through holes, so that the fasteners can pass through from top to bottom and be fastened to the turntable.

[0014] The bottom surface of the base has a positioning groove that is adapted to the positioning plate.

[0015] Compared with the prior art, the present invention has the following advantages and positive effects: This invention relates to a flexible fixture for industrial CT inspection. Multiple flexible fixture components are spaced apart on the base. Each flexible fixture component has an elastic support rod that can extend and retract vertically and includes an upper carbon fiber segment and a lower metal segment. The housing includes an upper carbon fiber guide sleeve and a lower locking seat. The upper end of the carbon fiber segment extends beyond the carbon fiber guide sleeve, thus supporting the sample to be inspected. The guide sleeve closest to the sample is also made of carbon fiber. Compared to existing rigid fixtures, this design can meet the clamping and inspection needs of samples with different shapes, improving fixture compatibility and versatility, while avoiding damage to the sample surface. Furthermore, the low density of carbon fiber can prevent scattering artifacts during X-ray scanning in industrial CT inspection equipment, thereby ensuring image reconstruction quality and accuracy. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of a flexible fixture for industrial CT inspection according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the flexible clamp assembly in an embodiment of the present invention; Figure 3 This is a front view of the flexible clamp assembly in this embodiment of the present invention, omitting the mounting base; Figure 4 for Figure 3 AA section view; Figure 5 for Figure 4 Enlarged view of part B; Figure 6 This is a schematic diagram of the mounting base structure of the flexible clamp assembly in an embodiment of the present invention; Figure 7This is a schematic diagram of the assembly structure of the base and the turntable in an embodiment of this utility model.

[0018] Figure label: 100. Base; 110. Mounting hole; 120. Positioning plate; 130. Second positioning groove; 200. Flexible clamp assembly; 210. Housing; 211. Carbon fiber guide sleeve; 212. Locking seat; 213. Limiting plate; 214. Guide slide; 215. Protrusion; 220. Carbon fiber section; 230. Metal section; 231. Large diameter section; 232. Small diameter section; 240. Spring; 250. Mounting base; 251. Positioning pin; 252. Waist hole; 260. Locking device; 261. Locking set screw; 262. Locking block; 270. Heightening block; 271. Positioning hole; 280. Locking knob; 300. Handle; 400, Turntable; 410, First positioning slot. Detailed Implementation

[0019] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0020] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0021] Reference Figures 1 to 7 In some embodiments of this utility model, a flexible fixture for industrial CT inspection is used to clamp samples to be inspected by industrial CT, which includes a base 100 and a plurality of flexible fixture assemblies 200.

[0022] The base 100 is the mounting base of the entire flexible fixture. A connection structure is formed on it for coaxial connection with the turntable 400 of the industrial CT inspection equipment, so that the entire flexible fixture can be coaxially mounted on the turntable 400 of the industrial CT inspection equipment, and the clamped sample can be rotated and measured as the turntable 400 moves.

[0023] Multiple flexible clamp components 200 are spaced apart on the base 100. The specific arrangement depends on the outline shape of the sample to be tested. For example, it can be arranged circumferentially or linearly. No specific restrictions are made here.

[0024] Each flexible clamp assembly 200 includes a flexible clamp body and a mounting base 250. The mounting base 250 is mounted on the base 100, and the flexible clamp body is mounted on the mounting base 250. The flexible clamp body includes a vertical cylindrical (through-ends) housing 210 and several vertically extendable elastic support rods disposed within the housing 210. Each elastic support rod can extend and retract vertically independently. The housing 210 includes an upper carbon fiber guide sleeve 211 and a lower locking seat 212. Both the carbon fiber guide sleeve 211 and the locking seat 212 are cylindrical. The elastic support rod consists of an upper carbon fiber segment 220 and a lower metal segment 230, which are coaxially connected as one unit. The upper end of the carbon fiber segment 220 extends from the upper opening of the housing 210 (specifically, the upper opening of the carbon fiber guide sleeve 211) to the outside of the carbon fiber guide sleeve 211. The lower end of the metal segment 230 extends into the locking seat 212. A locking device 260 for locking the elastic support rod is provided on the side wall of the locking seat 212.

[0025] In use, the entire flexible fixture is coaxially mounted on the turntable 400 of the industrial CT inspection equipment via its base 100. The sample to be tested is supported on multiple flexible fixture assemblies 200. The elastic support rods in contact with the sample retract downwards under the action of the sample's gravity. After the multiple elastic support rods of the multiple flexible fixture assemblies 200 are in contact with the contour of the sample to be tested, the locking device 260 is operated to lock the position of the elastic support rods, thus completing the clamping and fixing of the sample to be tested. Then, rotation measurement can be performed as the turntable 400 rotates.

[0026] The elastic support rod can automatically expand and contract under the weight of the sample to fit the sample's contour. Compared with existing rigid clamps, it can meet the clamping and testing needs of samples with different shapes, improve the clamp's compatibility and versatility, and avoid damage to the sample surface. The upper part of the elastic support rod, namely the carbon fiber segment 220, is in direct contact with the sample, and the upper guide sleeve of the housing 210 is also made of carbon fiber. The low density of carbon fiber can avoid scattering artifacts during X-ray scanning of industrial CT inspection equipment, thereby ensuring the quality and accuracy of image reconstruction.

[0027] The locking device 260 on the locking seat 212 can lock the position of the elastic support rod after it is fitted and aligned with the contour of the sample to be tested, thereby locking the sample positioning space formed by multiple elastic support rods. When testing the same batch of samples, once the previous sample is tested, the next sample can be directly placed within the sample positioning space without further adjustment, further improving sample testing efficiency. Furthermore, locking the position of the elastic support rod by the locking device 260 ensures its stability during the rotation of the turntable 400, preventing accidental extension or retraction, thus ensuring stable sample testing posture and improving testing accuracy. After the batch of samples is tested, the locking device 260 is unlocked, and the elastic support rods automatically pop out and reset.

[0028] In some embodiments of this utility model, an internal thread is formed at the center of the bottom end of the carbon fiber segment 220 of the elastic support rod, and a stud is formed at the center of the top end of the metal segment 230. The carbon fiber segment 220 and the metal segment 230 are connected by a threaded engagement and are bonded together with strong adhesive to improve the reliability of the connection. Similarly, the carbon fiber guide sleeve 211 and the locking seat 212 can also be connected by a threaded engagement, and no specific limitation is made here.

[0029] In some embodiments of this utility model, such as Figure 4 and Figure 5 As shown, the locking seat 212 is a metal cylindrical shape, which is coaxially arranged with the carbon fiber guide sleeve 211 and connected to the lower end of the carbon fiber guide sleeve 211. A limiting plate 213 is fixed inside the locking seat 212, and through holes corresponding to the elastic support rods are formed on the limiting plate 213. The metal section 230 of the elastic support rod is thicker at the top and thinner at the bottom, including a large diameter section 231 at the top and a small diameter section 232 at the bottom. The diameter of the large diameter section 231 is equal to the diameter of the carbon fiber section 220, and the diameter of the small diameter section 232 is smaller than the diameter of the large diameter section 231. The small diameter section 232 passes through the through hole, and a spring 240 is sleeved on the small diameter section 232. The spring 240 is clamped between the limiting plate 213 and the large diameter section 231.

[0030] The inner diameter of spring 240 is larger than the diameter of the small diameter section 232 but smaller than the diameter of the large diameter section 231, so that it can be held between the limiting plate 213 and the large diameter section 231. When it retracts downward under the weight of the sample to be tested, spring 240 is compressed and stores energy. After the sample is removed, the elastic support rod automatically resets under the elastic force of spring 240.

[0031] The large-diameter sections 231 of adjacent elastic support rods are in contact with each other; the locking device 260 includes a locking screw 261 and a locking block 262. A horizontal threaded hole is formed on the locking seat 212 that is threaded with the locking screw 261. The locking screw 261 is installed in conjunction with the horizontal threaded hole; the locking block 262 is horizontally slidably disposed between the large-diameter section 231 and the locking screw 261 and is threadedly connected to the locking screw 261. By rotating the locking screw 261, the locking block 262 is driven to slide horizontally, causing the locking block 262 to press against the adjacent large-diameter section 231. Since the large-diameter sections 231 of adjacent elastic support rods are in contact with each other, the large-diameter sections 231 of all elastic support rods are sequentially pressed against each other, thereby locking the elastic support rods; similarly, rotating the locking screw 261 in the opposite direction causes the locking screw 261 to slide horizontally away from the large-diameter section 231 to unlock the elastic support rod.

[0032] The large-diameter section 231 is made of metal, which has high strength and can withstand the compression of the locking block 262, ensuring the locking effect while also ensuring the service life of the elastic support rod.

[0033] Specifically, a guide slide 214 can be formed on the inner wall of the locking seat 212 to restrict the locking block 262 to slide horizontally only, so that when the locking set screw 261 is rotated, the rotation of the locking set screw 261 drives the locking block 262 to slide horizontally only, and cannot rotate with the locking set screw 261.

[0034] In some embodiments of this utility model, a protruding protrusion 215 is formed on the side wall of the locking seat 212. The protrusion 215 increases the wall thickness of the locking seat 212. A horizontal threaded hole penetrates the side wall and the protrusion 215 of the locking seat 212, thereby providing possible space for the installation of the locking set screw 261 and the locking block 262, which facilitates production and assembly.

[0035] In some embodiments of this utility model, the locking block 262 is an arc-shaped block that semi-encloses the outer side of the large-diameter section 231 of several elastic support rods, so as to squeeze and contact as many large-diameter sections 231 of elastic support rods as possible, thereby improving the locking effect.

[0036] In some embodiments of this utility model, each flexible clamp assembly 200 further includes a heightening block 270, which is installed between the locking seat 212 and the mounting seat 250, and is detachably connected to both the locking seat 212 and the mounting seat 250. Multiple heightening blocks 270 can be provided at different heights. Each flexible clamp assembly 200 can select an appropriate model and number of heightening blocks 270 to be placed between the locking seat 212 and the mounting seat 250 according to the shape and size of the sample to be tested, thereby adjusting the height of the flexible clamp assembly 200, further improving the compatibility and versatility of the flexible clamp of this utility model, and enhancing the clamping and support effect.

[0037] Specifically, the heightening block 270 is a cylindrical shape with an open top, coaxially sleeved with the locking seat 212, and locked by a side set screw. The heightening block 270 and the locking seat 212 can be detachably connected by tightening or loosening the set screw.

[0038] The bottom center of the riser block 270 has a positioning hole 271, and the mounting base 250 has a vertically extending positioning post 251. The riser block 270 is placed on the mounting base 250 by the cooperation of the positioning hole 271 and the positioning post 251, and the positioning post 251 is locked by the set screw on the side of the riser block 270. The riser block 270 and the mounting base 250 can be detachably connected by locking or loosening the set screw.

[0039] In some embodiments of this utility model, such as Figure 1 , Figure 2 , Figure 6 and Figure 7 As shown, the base 100 has a plurality of mounting holes 110 arranged in an array, and the mounting seat 250 has a waist hole 252. The locking knob 280 passes through the waist hole 252 and is threaded into one of the mounting holes 110, thereby realizing a detachable connection between the mounting seat 250 and the base 100. By arranging a plurality of mounting holes 110 in an array on the base 100 and providing a waist hole 252 on the mounting seat 250, the installation position of the flexible clamp assembly 200 can be adjusted arbitrarily, increasing its degree of adjustment freedom and making it compatible with clamping samples of different sizes to be tested.

[0040] In some embodiments of this utility model, the connection structure on the base 100 for coaxial connection with the turntable 400 of the industrial CT inspection equipment, such as... Figure 7 As shown, the system includes a positioning plate 120 and fasteners (such as screws, not shown). The positioning plate 120 is located at the center of the bottom surface of the base 100 and is coaxial with the base 100. The positioning plate 120 protrudes downward relative to the bottom surface of the base 100. Both the center of the base 100 and the center of the positioning plate 120 have through holes. The turntable 400 has a corresponding first positioning groove 410 that is adapted to the positioning plate 120. After the positioning plate 120 is engaged with the positioning groove, the fastener passes through the center through hole a of the base 100 and the center through hole b of the positioning plate 120 from top to bottom and is then fastened to the turntable 400.

[0041] This connection structure enables the entire fixture assembly to be quickly aligned and connected with the turntable 400, improving connection efficiency and thus improving inspection efficiency.

[0042] Furthermore, a second positioning groove 130 adapted to the positioning plate 120 is formed on the bottom surface of the base 100. The upper part of the positioning plate 120 is embedded in the second positioning groove 130, which further facilitates the placement of the positioning plate 120 and improves the connection efficiency between the base 100 and the turntable 400.

[0043] In some embodiments of this utility model, the base 100 is also provided with a handle 300 for easy manual handling.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A flexible jig for industrial CT inspection, characterized by, include: The base has a connection structure formed thereon for coaxial connection with the turntable of industrial CT inspection equipment; Multiple flexible clamping assemblies are spaced apart on the base; each flexible clamping assembly includes a flexible clamping body and a mounting base, the mounting base being mounted on the base and the flexible clamping body being mounted on the mounting base; the flexible clamping body includes a vertically cylindrical housing and a plurality of vertically retractable elastic support rods disposed within the housing; the housing includes an upper carbon fiber guide sleeve and a lower locking seat, the elastic support rod includes an upper carbon fiber segment and a lower metal segment, the upper end of the carbon fiber segment extending outside the carbon fiber guide sleeve, the lower end of the metal segment extending into the locking seat, and a locking device for locking the elastic support rod is provided on the side wall of the locking seat.

2. The flexible fixture for industrial CT inspection according to claim 1, characterized in that, The locking seat is a metal cylinder, which is coaxially arranged with the carbon fiber guide sleeve and connected to the lower end of the carbon fiber guide sleeve. A limiting plate is fixed inside the locking seat, and through holes corresponding to the elastic support rods are formed on the limiting plate. The metal segment includes an upper large-diameter segment and a lower small-diameter segment. The small-diameter segment passes through the through hole, and a spring is sleeved on the small-diameter segment between the limiting plate and the large-diameter segment.

3. The flexible fixture for industrial CT inspection according to claim 2, characterized in that, Adjacent large-diameter segments are in contact with each other; The locking device locks the locking screw and the locking block. The locking seat has a horizontal threaded hole that engages with the locking screw. The locking screw is installed in conjunction with the horizontal threaded hole. The locking block is horizontally slidably disposed between the large-diameter section and the locking screw, and is threadedly engaged with the locking screw. By rotating the locking screw, the locking block is moved to slide horizontally and squeeze the large-diameter section to lock the elastic support rod or disengage from the large-diameter section to unlock the elastic support rod.

4. The flexible fixture for industrial CT inspection according to claim 3, characterized in that, The locking block is an arc-shaped block that semi-encloses the outer side of the large-diameter section of several elastic support rods.

5. The flexible fixture for industrial CT inspection according to claim 1, characterized in that, Each of the flexible clamping components further includes a heightening block for mounting between the locking seat and the mounting seat, and is detachably connected to both the locking seat and the mounting seat.

6. The flexible fixture for industrial CT inspection according to claim 1, characterized in that, The base is provided with a plurality of mounting holes arranged in an array, and the mounting seat is provided with a waist hole. The mounting seat and the base are connected by a locking knob passing through the waist hole and threadedly engaging with one of the mounting holes.

7. The flexible fixture for industrial CT inspection according to claim 1, characterized in that, The connection structure includes a positioning plate and fasteners. The positioning plate is located at the center of the bottom surface of the base and is coaxial with the base. The positioning plate protrudes downward relative to the bottom surface of the base. Both the center of the base and the center of the positioning plate have through holes, so that the fasteners can pass through from top to bottom and be fastened to the turntable.

8. The flexible fixture for industrial CT inspection according to claim 7, characterized in that, The bottom surface of the base has a positioning groove that is adapted to the positioning plate.

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