Clamping device for CT detection

Abstract

The invention discloses a clamping device for CT detection, and relates to the technical field of CT detection, the clamping device comprises a rack body, and a cylindrical part clamping mechanism is fixedly mounted on the rack body; the cylindrical part clamping mechanism comprises a first mounting frame; a lead screw motor is fixed at one end of the first mounting frame, a positive and negative rotation lead screw is mounted on an output shaft of the lead screw motor in a matched manner, and the other end of the positive and negative rotation lead screw is mounted on the first mounting frame in a matched manner through a mounted bearing; when X-ray scanning is carried out on the cylindrical workpiece, the rotating motor can further drive the clamping wheel to rotate, and the cylindrical workpiece is made to rotate under the cooperation of the other clamping wheel and the auxiliary wheel, so that multi-angle scanning of the cylindrical workpiece is achieved, and it is guaranteed that CT detection data is more comprehensive and accurate. According to the design, the scanning flexibility is improved, the reliability of a detection result is greatly enhanced, and a solid data support is provided for subsequent quality analysis and judgment.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of industrial CT detection, and particularly relates to a clamping device for CT detection. BACKGROUND

[0002] In industrial production, some cylindrical parts such as rock cores or other cylindrical test pieces need to be detected by CT. During detection, the cylindrical parts are first clamped by a clamping mechanism. The clamping mechanism includes two fixed clamping heads, which clamp the ends of the cylindrical parts, respectively. Then, under the driving of the moving platform of the CT detection equipment, the cylindrical parts move horizontally in the left-right direction. During the movement of the cylindrical parts, the X-ray beam of the CT detection equipment scans and detects the cylindrical parts.

[0003] Chinese patent application No. 202123196260.5 provides a clamping device on a CT detection equipment, which includes a fixed plate, two bases and two support plates. The two bases are installed on the fixed plate through a connecting rod driving mechanism. Under the action of the connecting rod driving mechanism, the two bases move towards or away from each other. Each of the two support plates is installed on one base through a support. The top surface of the support plate is provided with a clamping piece for clamping the cylindrical parts. The two clamping pieces are arranged opposite to each other.

[0004] The CT detection equipment in the above patent can only clamp the cylindrical workpiece and adjust the distance according to the length of the workpiece. However, the cylindrical part only moves horizontally along the axial direction during the whole process, and only single-direction projection data can be obtained. The identification accuracy of the circumferential defects (such as ring cracks and local wall thickness unevenness) of the cylindrical part is low, and small defects are easily missed due to projection overlap. SUMMARY

[0005] The present application aims to provide a clamping device for CT detection. The clamping device for CT detection can clamp cylindrical parts of different lengths and also realize the rotation of the cylindrical parts. The projection data in multiple directions (0°-360°) of the same cross section can be obtained. The computer eliminates the single-direction projection overlap problem through an algorithm, reconstructs a high-precision radial tomographic image without artifacts, accurately identifies circumferential small defects (such as μm-level micro-cracks and local pores), and realizes accurate measurement of the radial size. The CT detection equipment in the prior art can only clamp the cylindrical workpiece and adjust the distance according to the length of the workpiece. However, the cylindrical part only moves horizontally along the axial direction during the whole process, and only single-direction projection data can be obtained. The identification accuracy of the circumferential defects (such as ring cracks and local wall thickness unevenness) of the cylindrical part is low, and small defects are easily missed due to projection overlap.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical scheme: The utility model provides a kind of clamping device for CT detection, including rack body, which is fixedly installed with cylindrical piece clamping mechanism;The cylindrical piece clamping mechanism includes first mounting frame;One end of the first mounting frame is fixed with lead screw motor, and the output shaft of the lead screw motor is matched and installed with positive and negative rotation screw rod, and the other end of the positive and negative rotation screw rod is matched and installed on the first mounting frame through bearing with seat;The positive and negative rotation screw rod is provided with guide rod on one side, and the both ends of the guide rod are fixed with the first mounting frame;The both ends of the guide rod are slidably connected with sliding seat, and the two sliding seats are also threadedly connected with the positive and negative rotation screw rod;Mechanical gripper is respectively matched and installed on each sliding seat; The mechanical gripper includes connecting seat fixed on the sliding seat;U-shaped frame is welded on the connecting seat, and the both ends of the U-shaped frame are fixed with gripper connecting piece through bolt;Two intermeshing toothed swing arms are provided on the outer side of the gripper connecting piece, one of the two toothed swing arms is movably connected with the gripper connecting piece through pivot, and the other toothed swing arm is matched and installed on the output shaft of gripper motor;The gripper motor is fixed on the side of the gripper connecting piece away from the toothed swing arm; The outer end of each toothed swing arm is fixed with gripper, and clamping wheel is matched and installed on the inner side of the gripper, and any one of the two clamping wheels is also drivingly connected with rotating motor fixed on the outer side of the gripper;Auxiliary wheel is matched and installed at the middle position of the gripper connecting piece, and the auxiliary wheel is located between the two grippers.

[0007] Preferably, the side of the first mounting frame is provided with two hinged seats;The hinged seats are fixedly connected with bottom plate;The bottom plate is fixed on the rack body through bolt; The bottom of the rack body is provided with at least one lifting cylinder;The lower end of the lifting cylinder is fixed with the rack body through movable connecting seat, and the cylinder rod end of the lifting cylinder is matched and installed with the bottom plate through fish eye joint.

[0008] Preferably, the outer side of the rack body is provided with two portal frames, and CT detection assembly is fixedly installed on the top of the two portal frames;The CT detection assembly includes two bottom beams, and the both ends of the bottom beams are respectively fixed on the two portal frames;Second mounting frame is fixed on the two bottom beams;Carrier is arranged below the second mounting frame, and X-ray instrument is fixed at the middle position of the bottom of the carrier.

[0009] Preferably, positioning guide rod is fixed on the both ends of the carrier;The positioning guide rod is slidably connected with guide seat fixed on the bottom side of the second mounting frame;Pushing cylinder is fixed at the middle position of the side of the second mounting frame;The cylinder rod of the pushing cylinder is fixed with the carrier.

[0010] Preferably, a material handling mechanism is fixed on the inner side of the upper end of each gantry frame; the material handling mechanism includes a connecting frame, and a transverse linear drive module is fixed on the outer side of the connecting frame; the drive part of the transverse linear drive module is fitted with a transfer frame; a longitudinal linear drive module is fixed on the transfer frame; the drive part of the longitudinal linear drive module is fitted with a lifting frame; and a robot arm is fitted at the bottom of the lifting frame.

[0011] Preferably, the robotic arm includes a crossbeam fixed to the lifting frame, with limit baffles fixed at both ends of the crossbeam, and two parallel sliding rods fixed between the two limit baffles; each end of the sliding rod is slidably connected to a sliding plate, and a gripper cylinder is fixed on each sliding plate; the two gripper cylinders are symmetrically arranged, and the cylinder rods of the two gripper cylinders are fixed to the fixed plate. The fixing plate is fixed at the middle position of the bottom of the crossbeam; each gripper cylinder has a material picking gripper fixed at the bottom, and the inner side of the material picking gripper is fixed with an anti-slip and protective rubber block.

[0012] Preferably, the frame body has two alignment components on one side, the two alignment components are arranged symmetrically, and a cylindrical feeding mechanism is provided between the two alignment components.

[0013] Preferably, the cylindrical part feeding mechanism includes a material rack body, on the inside of which a rotary motor is fixed; the rotary motor drives the feed screw to rotate through the cooperation of a synchronous belt and a synchronous pulley; the feed screw is mounted on the material rack body through a bearing seat; and two slide rails are also fitted on the upper end of the material rack body; a slide table is slidably connected to the two slide rails; the slide table is threadedly connected to the feed screw, and a bracket is fixed on the slide table.

[0014] Preferably, the alignment assembly includes a stabilizing frame on which a drive motor is mounted; the drive motor drives a drive screw to rotate via a synchronous pulley assembly, and the two ends of the drive screw are mounted on the stabilizing frame via bearing mounts; a sliding stage is mounted on the drive screw; the sliding stage is slidably connected to a slide rail mounted on the stabilizing frame; and an alignment cylinder is fixed on the sliding stage.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. In use, the lead screw motor drives the forward and reverse lead screw to rotate, causing the two slides to move in the same or opposite directions along the guide rod, thereby adjusting the distance between the two mechanical grippers; after adjustment, the cylindrical workpiece is placed in the two mechanical grippers, and the two mechanical grippers are used to clamp and fix the cylindrical workpiece to ensure the horizontality of the cylindrical workpiece.

[0016] 2. In this invention, the X-ray machine begins scanning along the cylindrical workpiece. During the scanning process, a push cylinder propels the carrier, which moves smoothly with the cooperation of the positioning guide rod and the guide seat. This drives the X-ray machine to perform precise scanning along the axial direction of the cylindrical workpiece, acquiring comprehensive CT inspection data. This clamping device has a reasonable structure, with all components working collaboratively, effectively meeting the clamping and scanning requirements of the cylindrical workpiece during CT inspection, improving the accuracy and efficiency of the inspection.

[0017] 3. In this invention, during X-ray scanning of a cylindrical workpiece, the rotating motor can also drive the clamping wheel to rotate. With the cooperation of another clamping wheel and an auxiliary wheel, the cylindrical workpiece is rotated, thereby achieving multi-angle scanning of the workpiece and ensuring more comprehensive and accurate CT detection data. This design not only improves the flexibility of scanning but also greatly enhances the reliability of the detection results, providing solid data support for subsequent quality analysis and judgment. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0019] Figure 2 In this invention Figure 1 The left view.

[0020] Figure 3 In this invention Figure 1 A schematic diagram of the rear structure.

[0021] Figure 4 This is a schematic diagram of the cylindrical clamping mechanism of the present invention in a flipped state.

[0022] Figure 5 In this invention Figure 4 The left view.

[0023] Figure 6 This is a schematic diagram of the cylindrical clamping mechanism in this invention.

[0024] Figure 7 In this invention Figure 6 Another perspective illustration.

[0025] Figure 8 In this invention Figure 1 Enlarged diagram of point A.

[0026] Figure 9 In this invention Figure 3 Enlarged diagram of point B.

[0027] Figure 10 This is a schematic diagram of the alignment component in this invention.

[0028] Figure 11This is a schematic diagram of the cylindrical part feeding mechanism in this invention.

[0029] Figure 12 In this invention Figure 6 Enlarged diagram of point C.

[0030] Figure 13 This is a schematic diagram of the planar structure of the cylindrical clamping mechanism in this invention.

[0031] In the diagram: 1-Cylindrical part feeding mechanism, 2-Alignment assembly, 3-Frame body, 4-Cylindrical part clamping mechanism, 5-Gantry frame, 6-Retrieving mechanism, 7-CT detection assembly, 8-Lifting cylinder; 11-Material rack body, 12-Rotary motor, 13-Synchronous pulley, 14-Slide rail, 15-Feed screw, 16-Bracket, 17-Slide table; 21-Stabilizing frame, 22-Drive motor, 23-Synchronous pulley assembly, 24-Drive screw, 25-Sliding table, 26-Alignment cylinder; 41-Base plate, 42-Hinge seat, 43-First mounting frame, 44-Screw motor, 45-Guide rod, 46-Slide block, 47-Forward and reverse screw, 48-Mechanical gripper; 481-Connecting seat, 482-U-shaped frame, 483-Grip connecting piece, 484-Toothed swing arm, 485-Gripper, 486-Gripping wheel, 487-Rotating motor, 488-Auxiliary wheel, 489-Gripper motor; 61-Connecting frame, 62-Transverse linear drive module, 63-Transfer frame, 64-Longitudinal linear drive module, 65-Lifting frame, 66-Crossbeam, 67-Slide rod, 68-Grip cylinder, 69-Material picking gripper, 610-Fixed plate, 611-Sliding lifting plate; 71-Bottom beam, 72-Second mounting frame, 73-Carrier, 74-X-ray machine, 75-Push cylinder, 76-Positioning guide rod, 77-Guide seat, 78-Hanging rod, 79-Detector. Detailed Implementation

[0032] 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 some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] Please see Figures 1 to 13In this embodiment of the invention, a clamping device for CT detection includes a frame body 3, on which a cylindrical clamping mechanism 4 is fixedly mounted; the cylindrical clamping mechanism 4 includes a first mounting frame 43; a lead screw motor 44 is fixed to one end of the first mounting frame 43, and a forward and reverse lead screw 47 is mounted on the output shaft of the lead screw motor 44; the other end of the forward and reverse lead screw 47 is mounted on the first mounting frame 43 through a bearing seat; a guide rod 45 is provided parallel to one side of the forward and reverse lead screw 47, and both ends of the guide rod 45 are fixed to the first mounting frame 43; two slide seats 46 are slidably connected to both ends of the guide rod 45, and the two slide seats 46 are also threadedly connected to the forward and reverse lead screw 47; a mechanical gripper 48 is respectively mounted on each slide seat 46.

[0034] Two gantry frames 5 are provided on the outer side of the frame body 3, and a CT detection assembly 7 is fixedly installed on the top of the two gantry frames 5. The CT detection assembly 7 includes two bottom beams 71, and the two ends of the bottom beams 71 are respectively fixed on the two gantry frames 5. A second mounting frame 72 is fixed on the two bottom beams 71. A carrier 73 is provided below the second mounting frame 72, and an X-ray machine 74 is fixed at the middle position of the bottom of the carrier 73.

[0035] Specifically, positioning guide rods 76 are fixed at both ends of the carrier 73; the positioning guide rods 76 are slidably connected to guide seats 77 fixed to the bottom side of the second mounting frame 72; a push cylinder 75 is fixed at the middle position of one side of the second mounting frame 72; the cylinder rod of the push cylinder 75 is fixed to the carrier 73. A lifting rod 78 is also fixed to the bottom of the carrier 73, and a detector 79 is fixed to the bottom of the lifting rod 78; the detector 79 is located directly below the X-ray machine 74, and the detector 79 and the X-ray machine 74 form a scanning pair.

[0036] It should be noted that, please refer to the appendix. Figure 6 and 7 The first mounting frame 43 is arranged in a G-shape to prevent the detector 79 from interfering with the first mounting frame 43 when it is flipped; in addition, there is sufficient distance between the detector 79 and the X-ray instrument 74 to avoid interference with the cylindrical clamping mechanism 4.

[0037] By adopting the above technical solution, during use, the lead screw motor 44 drives the forward and reverse lead screw 47 to rotate, so that the two slides 46 move in the same direction or opposite direction along the guide rod 45, thereby adjusting the distance between the two mechanical grippers 48; after adjustment, the cylindrical workpiece is placed in the two mechanical grippers 48, and the two mechanical grippers 48 are used to clamp and fix the cylindrical workpiece to ensure the horizontality of the cylindrical workpiece. The X-ray machine 74 begins scanning along the cylindrical workpiece. During the scanning process, the push cylinder 75 pushes the carrier 73. The carrier 73 moves smoothly with the cooperation of the positioning guide rod 76 and the guide seat 77, thereby driving the X-ray machine 74 to perform precise scanning along the axial direction of the cylindrical workpiece and obtain comprehensive CT inspection data of the cylindrical workpiece. This clamping device has a reasonable structure, and all components work together to effectively meet the clamping and scanning requirements of the cylindrical workpiece during CT inspection, improving the accuracy and efficiency of the inspection.

[0038] Please see the appendix Figure 12 and Figure 13 In this embodiment, the mechanical gripper 48 includes a connecting seat 481 fixed on the slide 46; a U-shaped frame 482 is welded onto the connecting seat 481, and gripper connecting pieces 483 are fixed to both ends of the U-shaped frame 482 by bolts; two meshing toothed swing arms 484 are provided on the outer side of the gripper connecting piece 483, one of the two toothed swing arms 484 is movably connected to the gripper connecting piece 483 through a rotating shaft, and the other toothed swing arm 484 is fitted onto the output shaft of the gripper motor 489; the gripper motor 489 is fixed on the side of the gripper connecting piece 483 away from the toothed swing arms 484; Each toothed swing arm 484 has a gripper 485 fixed at its outer end, and a clamping wheel 486 is installed on the inner side of the gripper 485. Either of the two clamping wheels 486 is also connected to a rotating motor 487 fixed on the outer side of the gripper 485. An auxiliary wheel 488 is installed in the middle of the gripper connecting piece 483, and the auxiliary wheel 488 is located between the two grippers 485.

[0039] By adopting the above technical solution, when clamping a cylindrical workpiece, the gripper motor 489 drives a toothed swing arm 484 to rotate. Since the two toothed swing arms 484 mesh with each other, the two toothed swing arms 484 will close simultaneously. The gripper 485 installed on the toothed swing arm 484 will close accordingly, so that the clamping wheel 486 and the auxiliary wheel 488 will hold the cylindrical workpiece tightly. When performing X-ray scanning on a cylindrical workpiece, the rotating motor 487 can also drive the clamping wheel 486 to rotate. With the cooperation of another clamping wheel 486 and an auxiliary wheel 488, the cylindrical workpiece rotates, thus enabling multi-angle scanning and ensuring more comprehensive and accurate CT detection data. This design not only improves scanning flexibility but also greatly enhances the reliability of the detection results, providing solid data support for subsequent quality analysis and judgment.

[0040] Rotation of cylindrical workpieces serves as a supplementary means to improve accuracy. Rotational scanning can acquire projection data of the same cross section in multiple directions (0°-360°). The computer eliminates the problem of projection overlap in a single direction through algorithms, reconstructs a high-precision radial tomographic image without artifacts, and can accurately identify circumferential micro-defects (such as μm-level micro-cracks and local pores), and can achieve accurate measurement of radial dimensions (error ≤0.01mm).

[0041] More specifically, the rotation of the cylindrical workpiece, combined with the movement of the X-ray machine 74 along the axial direction of the cylindrical workpiece, balances the efficiency of full-length scanning and the accuracy of full-circumferential projection. The reconstructed three-dimensional image can accurately locate the three-dimensional coordinates of defects in the circumferential, axial, and radial directions of the cylindrical workpiece, and can realize continuous measurement of the radial dimension of the entire length of the cylindrical workpiece, completely avoiding the problem of missed detection by single-direction projection.

[0042] Please refer to the attached diagram. Figure 6 and Figure 7 Unlike the above embodiments, the first mounting frame 43 has two hinge seats 42 on one side; the hinge seats 42 are fixedly connected to the base plate 41; the base plate 41 is fixed to the frame body 3 by bolts. The bottom of the frame body 3 is provided with at least one lifting cylinder 8; the lower end of the lifting cylinder 8 is fixed to the frame body 3 through a movable connecting seat, and the end of the cylinder rod of the lifting cylinder 8 is installed in conjunction with the base plate 41 through a fisheye joint.

[0043] By adopting the above technical solution, when the lifting cylinder 8 extends, the first mounting frame 43 rotates around the pivot point of the hinge seat 42, causing the first mounting frame 43 to rotate as a whole, thereby causing the opening of the mechanical gripper 48 to face one side of the cylindrical workpiece feeding mechanism 1 so that the cylindrical workpiece can be fed in.

[0044] Please see the appendix Figure 10 and Figure 11 In this embodiment, two alignment components 2 are provided on one side of the frame body 3. The two alignment components 2 are arranged symmetrically, and a cylindrical feeding mechanism 1 is provided between the two alignment components 2.

[0045] The cylindrical part feeding mechanism 1 includes a material rack body 11, on the inner side of which a rotary motor 12 is fixed. The rotary motor 12 drives the feed screw 15 to rotate through the cooperation of a synchronous belt and a synchronous pulley 13. The feed screw 15 is mounted on the material rack body 11 through a bearing seat. Two slide rails 14 are also installed on the upper end of the material rack body 11. A slide table 17 is slidably connected to the two slide rails 14. The slide table 17 is threadedly connected to the feed screw 15, and a bracket 16 is fixed on the slide table 17.

[0046] The alignment assembly 2 includes a stabilizing frame 21 on which a drive motor 22 is mounted. The drive motor 22 drives a drive screw 24 to rotate via a synchronous pulley assembly 23. Both ends of the drive screw 24 are mounted on the stabilizing frame 21 via bearing mounts. A sliding table 25 is mounted on the drive screw 24. The sliding table 25 is slidably connected to a slide rail mounted on the stabilizing frame 21. An alignment cylinder 26 is fixed on the sliding table 25.

[0047] By adopting the above technical solution, the cylindrical part feeding mechanism 1 is equipped with a bracket 16, which can be used for manual placement or placement in conjunction with a robotic arm. After the cylindrical workpiece is placed into the bracket 16... The rotary motor 12 starts, driving the feed screw 15 to rotate via the synchronous belt and synchronous pulley 13. Since the feed screw 15 is threadedly connected to the slide table 17, and the slide table 17 slides on the two slide rails 14, it moves along the slide rails 14, thus conveying the cylindrical workpiece on the bracket 16 between the two mechanical grippers 48. At the same time, the drive motor 22 in the two alignment assemblies 2 starts, driving the drive screw 24 to rotate via the synchronous pulley assembly 23. The sliding table 25 on the drive screw 24 moves with the cooperation of the slide rails, and the alignment cylinder 26 on the sliding table 25 extends to perform an alignment operation on the cylindrical workpiece, ensuring that the cylindrical workpiece is in the accurate position. Then the mechanical grippers 48 close, thus realizing the clamping of the cylindrical workpiece.

[0048] Please see the appendix Figure 9 In this embodiment, a material handling mechanism 6 is fixed on the inner side of the upper end of each gantry frame 5; the material handling mechanism 6 includes a connecting frame 61, and a transverse linear drive module 62 is fixed on the outer side of the connecting frame 61; the drive part of the transverse linear drive module 62 is fitted with a transfer frame 63; a longitudinal linear drive module 64 is fixed on the transfer frame 63; the drive part of the longitudinal linear drive module 64 is fitted with a hoisting frame 65; and a robot arm is fitted on the bottom of the hoisting frame 65.

[0049] More specifically, the robotic arm includes a crossbeam 66 fixed to the lifting frame 65. Limiting baffles are fixed at both ends of the crossbeam 66, and two parallel sliding rods 67 are fixed between the two limiting baffles. A sliding lifting plate 611 is slidably connected to each end of the sliding rod 67, and a gripper cylinder 68 is fixed on each sliding lifting plate 611. The two gripper cylinders 68 are symmetrically arranged, and the cylinder rods of the two gripper cylinders 68 are fixed to the fixing plate 610. The fixing plate 610 is fixed at the middle position of the bottom of the crossbeam 66; each gripper cylinder 68 has a material picking gripper 69 fixed at the bottom, and the inner side of the material picking gripper 69 is fixed with an anti-slip and protective rubber block.

[0050] By adopting the above technical solution, after the cylindrical workpiece is inspected, the robot arm clamps the workpiece in cooperation with the connecting frame 61 and the transverse linear drive module 62. During clamping, the cylinder rods of the two gripper cylinders 68 retract simultaneously, and the two picking grippers 69 move closer together under the guidance of the sliding plate 611 and the sliding rod 67, thus firmly clamping the cylindrical workpiece. The anti-slip and protective rubber blocks effectively increase the friction between the workpiece and the robot arm, preventing the workpiece from slipping during clamping. They also protect the workpiece surface, preventing damage due to excessive clamping force. Subsequently, driven by the transverse linear drive module 62, the transfer frame 63 moves the entire robot arm laterally, removing the clamped cylindrical workpiece from the inspection position. Then, the longitudinal linear drive module 64 is activated, and its drive unit moves the lifting frame 65 downwards, allowing the robot arm to place the cylindrical workpiece in the designated storage position. The entire material handling process is automated through the coordinated operation of various components, which not only improves material handling efficiency but also ensures the accuracy and stability of material handling, greatly reducing the labor intensity and error rate of manual operation.

[0051] The working principle of this invention is as follows: When in use, the lead screw motor 44 drives the forward and reverse lead screw 47 to rotate, so that the two slides 46 move in the same direction or opposite direction along the guide rod 45, thereby adjusting the distance between the two mechanical grippers 48; after the adjustment is completed, the cylindrical workpiece is placed in the two mechanical grippers 48, and the two mechanical grippers 48 are used to clamp and fix the cylindrical workpiece to ensure the horizontality of the cylindrical workpiece. The X-ray machine 74 begins scanning along the cylindrical workpiece. During the scanning process, the push cylinder 75 pushes the carrier 73. The carrier 73 moves smoothly with the cooperation of the positioning guide rod 76 and the guide seat 77, thereby driving the X-ray machine 74 to perform precise scanning along the axial direction of the cylindrical workpiece and obtain comprehensive CT inspection data of the cylindrical workpiece. This clamping device has a reasonable structure, and all components work together to effectively meet the clamping and scanning requirements of the cylindrical workpiece during CT inspection, improving the accuracy and efficiency of the inspection.

[0052] When performing X-ray scanning on a cylindrical workpiece, the rotating motor 487 can also drive the clamping wheel 486 to rotate. With the cooperation of another clamping wheel 486 and an auxiliary wheel 488, the cylindrical workpiece rotates, thus enabling multi-angle scanning and ensuring more comprehensive and accurate CT detection data. This design not only improves scanning flexibility but also greatly enhances the reliability of the detection results, providing solid data support for subsequent quality analysis and judgment.

[0053] Rotation of cylindrical workpieces serves as a supplementary means to improve accuracy. Rotational scanning can acquire projection data from multiple directions on the same cross section. The computer uses algorithms to eliminate the problem of projection overlap in a single direction, reconstructing a high-precision radial tomographic image without artifacts. This can accurately identify minute circumferential defects and achieve precise measurement of radial dimensions.

[0054] More specifically, the rotation of the cylindrical workpiece, combined with the movement of the X-ray machine 74 along the axial direction of the cylindrical workpiece, balances the efficiency of full-length scanning and the accuracy of full-circumferential projection. The reconstructed three-dimensional image can accurately locate the three-dimensional coordinates of defects in the circumferential, axial, and radial directions of the cylindrical workpiece, and can realize continuous measurement of the radial dimension of the entire length of the cylindrical workpiece, completely avoiding the problem of missed detection by single-direction projection.

[0055] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0056] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A clamping device for CT detection, comprising a frame body (3), on which a cylindrical clamping mechanism (4) is fixedly mounted; the cylindrical clamping mechanism (4) comprises a first mounting frame (43); characterized in that: One end of the first mounting frame (43) is fixed with a lead screw motor (44), and a forward and reverse lead screw (47) is installed on the output shaft of the lead screw motor (44). The other end of the forward and reverse lead screw (47) is installed on the first mounting frame (43) through a bearing seat. A guide rod (45) is provided parallel to one side of the forward and reverse lead screw (47). The two ends of the guide rod (45) are fixed to the first mounting frame (43). The two ends of the guide rod (45) are slidably connected to slide blocks (46), and the two slide blocks (46) are also threadedly connected to the forward and reverse lead screw (47). A mechanical gripper (48) is installed on each slide block (46).

2. The clamping device for CT detection according to claim 1, characterized in that: The mechanical gripper (48) includes a connecting seat (481) fixed on a slide (46); a U-shaped frame (482) is welded on the connecting seat (481), and gripper connecting pieces (483) are fixed to both ends of the U-shaped frame (482) by bolts; two meshing toothed swing arms (484) are provided on the outer side of the gripper connecting piece (483), one of the two toothed swing arms (484) is movably connected to the gripper connecting piece (483) through a rotating shaft, and the other toothed swing arm (484) is fitted on the output shaft of the gripper motor (489); the gripper motor (489) is fixed on the side of the gripper connecting piece (483) away from the toothed swing arm (484); Each toothed swing arm (484) has a gripper (485) fixed at its outer end, and a clamping wheel (486) is installed on the inner side of the gripper (485). Either of the two clamping wheels (486) is also connected to a rotating motor (487) fixed on the outer side of the gripper (485). An auxiliary wheel (488) is installed in the middle of the gripper connecting piece (483), and the auxiliary wheel (488) is located between the two grippers (485).

3. The clamping device for CT detection according to claim 1, characterized in that: The first mounting frame (43) has two hinge seats (42) on one side; the hinge seats (42) are fixedly connected to the base plate (41); the base plate (41) is fixed to the frame body (3) by bolts; The bottom of the frame body (3) is provided with at least one lifting cylinder (8); the lower end of the lifting cylinder (8) is fixed to the frame body (3) through a movable connecting seat, and the end of the cylinder rod of the lifting cylinder (8) is installed with the base plate (41) through a fisheye joint.

4. The clamping device for CT detection according to claim 1, characterized in that: The frame body (3) is provided with two gantry frames (5) on the outside, and a CT detection assembly (7) is fixedly installed on the top of the two gantry frames (5); the CT detection assembly (7) includes two bottom beams (71), and the two ends of the bottom beams (71) are fixed on the two gantry frames (5) respectively; a second mounting frame (72) is fixed on the two bottom beams (71); a carrier (73) is provided below the second mounting frame (72), and an X-ray machine (74) is fixed at the middle position of the bottom of the carrier (73).

5. The clamping device for CT detection according to claim 4, characterized in that: The carrier (73) is fixed with positioning guide rods (76) at both ends; the positioning guide rods (76) are slidably connected to the guide seat (77) fixed on the bottom side of the second mounting frame (72); a push cylinder (75) is fixed at the middle position on one side of the second mounting frame (72); the cylinder rod of the push cylinder (75) is fixed to the carrier (73).

6. The clamping device for CT detection according to claim 4, characterized in that: Each gantry (5) has a material handling mechanism (6) fixed on its inner side at the upper end; the material handling mechanism (6) includes a connecting frame (61), and a transverse linear drive module (62) is fixed on the outer side of the connecting frame (61); the drive part of the transverse linear drive module (62) is fitted with a transfer frame (63); a longitudinal linear drive module (64) is fixed on the transfer frame (63); the drive part of the longitudinal linear drive module (64) is fitted with a hoisting frame (65); and a robot arm is fitted on the bottom of the hoisting frame (65).

7. The clamping device for CT detection according to claim 6, characterized in that: The robotic arm includes a crossbeam (66) fixed to the lifting frame (65), with limit baffles fixed at both ends of the crossbeam (66), and two parallel sliding rods (67) fixed between the two limit baffles; a sliding plate (611) is slidably connected to each end of the sliding rod (67), and a gripper cylinder (68) is fixed on each sliding plate (611); the two gripper cylinders (68) are symmetrically arranged, and the cylinder rods of the two gripper cylinders (68) are fixed to the fixed plate (610); The fixing plate (610) is fixed at the middle position of the bottom of the crossbeam (66); each gripper cylinder (68) has a material picking gripper (69) fixed at the bottom, and the inner side of the material picking gripper (69) is fixed with an anti-slip and protective rubber block.

8. The clamping device for CT detection according to claim 1, characterized in that: Two alignment components (2) are provided on one side of the frame body (3). The two alignment components (2) are arranged symmetrically, and a cylindrical feeding mechanism (1) is provided between the two alignment components (2).

9. The clamping device for CT detection according to claim 8, characterized in that: The cylindrical feeding mechanism (1) includes a material rack body (11), on which a rotary motor (12) is fixedly installed. The rotary motor (12) drives the feed screw (15) to rotate through the cooperation of a synchronous belt and a synchronous pulley (13). The feed screw (15) is mounted on the material rack body (11) through a bearing seat. Two slide rails (14) are also installed on the upper end of the material rack body (11). A slide table (17) is slidably connected on the two slide rails (14). The slide table (17) is threadedly connected to the feed screw (15), and a bracket (16) is fixed on the slide table (17).

10. The clamping device for CT detection according to claim 9, characterized in that: The alignment assembly (2) includes a stabilizing frame (21) on which a drive motor (22) is mounted; the drive motor (22) drives a drive screw (24) to rotate via a synchronous pulley assembly (23), and the two ends of the drive screw (24) are mounted on the stabilizing frame (21) through bearing mounts; a sliding table (25) is mounted on the drive screw (24); the sliding table (25) is slidably connected to a slide rail mounted on the stabilizing frame (21); and an alignment cylinder (26) is fixed on the sliding table (25).

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