Industrial CT test platform and test method for special-shaped long aluminum casting

Abstract

The invention discloses an industrial CT test platform and a test method for a special-shaped long aluminum casting. The industrial CT test platform comprises a support frame and an auxiliary positioning ring, a circular groove is formed in the top of the supporting frame, a through hole used for vertically containing a casting to be detected is formed in the circular groove, and a CT detection effective space is formed in the middle of the supporting frame. The auxiliary positioning ring is contained in the circular groove of the supporting frame and at least comprises two positioning sub-blocks, each positioning sub-block is of a sector ring structure, the outer diameter of each positioning sub-block is consistent with the inner diameter of the circular groove, and all the positioning sub-blocks are encircled to form a positioning hole matched with the through hole and a positioning element matched with a casting product element to be detected. Therefore, the casting to be detected is positioned. According to the invention, the positioning sub-block is used to match with the irregular shape of the to-be-tested casting, so that the device can adapt to the to-be-tested castings with various different shapes; meanwhile, the to-be-detected casting is divided into the first head and the second head to be subjected to CT scanning detection twice, and complete scanning of the casting with the long size is achieved.

Description

Technical Field

[0001] This invention relates to the field of industrial CT technology, and in particular to an industrial CT testing platform and testing method for irregularly shaped long aluminum castings. Background Technology

[0002] For castings made of aluminum alloy, especially irregularly shaped long aluminum castings, the castings are large in the vertical direction and have a complex structure. When placed directly on the industrial CT turntable, they cannot be stably placed in contact with the turntable. Auxiliary tooling is required to support the castings.

[0003] Chinese Patent Publication No. CN223477454U, entitled "A Special Fixture for Industrial CT Scanners," discloses a special fixture for industrial CT scanners. This fixture includes a base and two housings fixedly mounted on one side of the base. One of the housings has threaded rods on both sides of its inner wall via bearings. In use, the output ends of two hydraulic rods move two clamping plates relative to each other, clamping the object to be inspected between the two plates and two foam plates. As the threaded rods rotate in different directions, a sleeve moves up and down on the outer surface of the threaded rods. By turning on the external power switch of the bidirectional motor, the output shaft of the bidirectional motor can rotate in both directions, allowing the sleeve to move to different positions and further adjusting the distance between the object to be inspected and the scanner. This allows for adjustable distance between the fixture and the scanner, facilitating the inspection of different objects. However, this industrial CT fixture is structurally complex and costly. Furthermore, the need to clamp the object between the two sides using hydraulic rods each time can create blind spots in the clamped area, reducing scanning accuracy.

[0004] For example, in the Chinese patent publication CN106018443A, an industrial CT inspection device and inspection method based on a 3D ball inspection platform is disclosed. The technology used is that the bullseye universal ball on the upper and lower support frames is in close contact with the outer spherical shell of the spherical workpiece tray to provide support and guidance. Although the bullseye universal ball can provide support from the top and bottom, when it is necessary to reverse the direction of the casting for inspection, there is a problem that the bullseye universal ball needs to be disassembled and reassembled, which reduces the inspection efficiency and cannot meet the needs of mass production. Summary of the Invention

[0005] This invention provides an industrial CT testing platform and testing method for irregularly shaped long aluminum castings to solve the technical problems mentioned in the background art.

[0006] To achieve the above objectives, the technical solution of the present invention is implemented as follows: This invention provides an industrial CT testing platform for irregularly shaped long aluminum castings, comprising: The support frame has a circular groove at the top, and a through hole for vertically accommodating the casting to be tested is provided in the circular groove. The middle part of the support frame forms an effective space for CT detection. An auxiliary positioning ring is housed in a circular groove of a support frame and includes at least two positioning sub-blocks. Each positioning sub-block has a fan-shaped ring structure. The outer diameter of the positioning sub-block is the same as the inner diameter of the circular groove. When all the positioning sub-blocks are enclosed, they form a positioning hole that matches the through hole and a positioning element that matches the element of the casting to be tested, so as to achieve the positioning of the casting to be tested.

[0007] Furthermore, the support frame includes a base, at least three support rods, and a top fixing frame; the top fixing frame is fixed to the top of the base at intervals by the at least three support rods. A circular groove is formed at the top center of the top fixing frame; a through hole is formed at the center of the circular groove.

[0008] Furthermore, there are three support rods, which are equidistantly distributed between the base and the top fixing frame, and the three support rods gradually converge towards the top fixing frame from the base.

[0009] Furthermore, a support block is fixed on the base, and the support block is positioned directly below the casting to be tested.

[0010] Furthermore, the auxiliary positioning ring includes two positioning sub-blocks, each of which is semi-circular, and the two positioning sub-blocks together form a complete circular structure on the outer ring.

[0011] Furthermore, the auxiliary positioning ring includes three positioning sub-blocks, which form a 120° fan-shaped ring. The three positioning sub-blocks together form a complete circular structure on the outer ring.

[0012] Furthermore, the auxiliary positioning ring includes at least three positioning sub-blocks, and the fan-shaped rings of the multiple positioning sub-blocks together form a circle with a central angle of less than 360°, and the inner diameter of each positioning sub-block is different.

[0013] Furthermore, there are multiple auxiliary positioning rings, and the inner diameters of the positioning sub-blocks on all the auxiliary positioning rings are not exactly the same.

[0014] Furthermore, the element of the casting product to be tested is a limiting groove, and the positioning element on the auxiliary positioning ring is the top and bottom surfaces on the same positioning sub-block, with the top and bottom surfaces on the same positioning sub-block embedded in the limiting groove. And / or, the element of the casting product to be tested is a limiting block, and the positioning element on the auxiliary positioning ring is the side of two adjacent positioning sub-blocks, and the side of the two adjacent positioning sub-blocks respectively abuts against the two sides of the limiting block. And / or, the element of the casting product to be tested is a limiting hole, and the positioning element on the auxiliary positioning ring is two parallel planes of the positioning sub-block, and the two parallel planes abut against the inner wall of the limiting hole. And / or, the element of the casting to be tested is a plane of the casting to be tested, and the positioning element on the auxiliary positioning ring is a plane of the positioning sub-block, with the two planes abutting each other.

[0015] In another aspect, the present invention provides a testing method for an industrial CT testing platform, comprising the following steps: S1. Pass the first end of the casting to be tested through the through hole, and use the positioning sub-block corresponding to the size of the casting to be tested at the circular groove to position the casting to be tested, so that the current scanning area on the casting to be tested is located within the effective space of CT detection; then perform industrial CT scanning detection on the casting to be tested within the effective space of CT detection to obtain the CT scan result of the first end of the casting to be tested. S2. Pass the second end of the casting to be tested through the through hole, and use the positioning sub-block corresponding to the size of the casting to be tested at the circular groove to position the casting to be tested, so that the current scanning area on the casting to be tested is located within the effective space of CT detection; then perform industrial CT scan detection on the casting to be tested within the effective space of CT detection again to obtain the CT scan result of the second end of the casting to be tested. S3. The CT scan results of the first end of the casting to be tested and the CT scan results of the second end of the casting to be tested are stitched together to form a complete CT scan image of the casting to be tested.

[0016] The beneficial effects of this invention are: 1. This invention discloses an industrial CT testing platform for irregularly shaped long aluminum castings. It has a simple structure and low equipment cost. At the same time, this invention uses an auxiliary positioning ring to position the casting to be tested (i.e., irregularly shaped long aluminum castings). Compared with traditional CT scanning platforms, which require electric control to clamp the casting to be tested, this invention does not consume electricity during the positioning process, making it more energy-efficient, faster in positioning, and more efficient in testing. Meanwhile, the industrial CT testing platform in this invention has a simple structure, fast positioning, and is easy and practical to operate, providing a strong basis for mass production.

[0017] 2. The auxiliary positioning ring in this invention can be configured into different configurations, which are perfectly applicable to a variety of different irregular long aluminum castings. Moreover, the configuration change operation of the auxiliary positioning ring is simple. Just place the appropriate positioning sub-block in the set position of the circular groove.

[0018] 3. In another aspect, the present invention also discloses a testing method, which disassembles the casting to be tested (i.e., the irregularly shaped long aluminum casting) into a first head and a second head. During each CT scan, the unobstructed end of the irregularly shaped long aluminum casting is scanned. Compared with the traditional method of using clamps to clamp the irregularly shaped long aluminum casting before CT scanning, the present invention does not produce a scanning blind zone during the CT scan process and has high scanning accuracy. After two scans are completed, the CT scan results of the first end and the CT scan results of the second end of the casting under test are stitched together, thus achieving a complete scan of a long casting under test. Attached Figure Description

[0019] Figure 1 This is a front structural diagram of the industrial CT testing platform in this invention; Figure 2 This is a top view of the industrial CT testing platform in this invention; Figure 3 This is an enlarged view of one of the structures of the auxiliary positioning ring in this invention; Figure 4 This is an enlarged view of the cross-sectional view of the top fixing frame in this invention; Figure 5 This is a schematic diagram of the structure of the casting to be tested in this invention.

[0020] Explanation of reference numerals in the attached figures: 1. Base; 11. Support block; 12. Fixing hole; 2. Support rod; 3. Top fixing frame; 31. Circular groove; 32. Through hole; 4. Auxiliary positioning ring; 41. Positioning sub-block; 5. Casting to be tested. Detailed Implementation

[0021] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of the invention are shown in the drawings. However, the invention can be implemented in many other different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the invention.

[0022] It should be noted that when a component is referred to as "fixed" or "set" on another component, it can be directly on or indirectly on the other component. When a component is referred to as "connected" to another component, it can be directly connected to or indirectly connected to the other component.

[0023] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0026] It should also be noted that in the embodiments of this application, the same reference numerals are used to represent the same component or part. For the same part in the embodiments of this application, the reference numerals may only be used to mark one part or component as an example. It should be understood that the reference numerals are also applicable to other identical parts or components.

[0027] Reference Figures 1 to 4 This application provides an industrial CT testing platform for irregularly shaped long aluminum castings, comprising: The support frame has a circular groove 31 at the top, and a through hole 32 in the circular groove 31 for vertically accommodating the casting 5 to be tested (i.e., the irregularly shaped long aluminum casting). The middle of the support frame forms an effective space for CT (Computed Tomography) inspection. The structure of the irregularly shaped long aluminum casting is shown below. Figure 5 As shown.

[0028] The auxiliary positioning ring 4 is housed in the circular groove 31 of the support frame and includes at least two positioning sub-blocks 41. Each positioning sub-block 41 has a fan-shaped ring structure. The outer diameter of the positioning sub-block 41 is the same as the inner diameter of the circular groove 31. When all the positioning sub-blocks 41 are closed, they form a positioning hole that matches the through hole 32 and a positioning element that matches the product element of the casting 5 to be tested, so as to realize the positioning of the casting 5 to be tested.

[0029] In some embodiments, the positioning sub-block 41 on the auxiliary positioning ring 4 is fixedly installed in the circular groove 31 by screws or bolts; Alternatively, the positioning sub-block 41 on the auxiliary positioning ring 4 is fixedly installed in the circular groove 31 by magnetic attraction; that is, the positioning sub-block 41 on the auxiliary positioning ring 4 has a certain magnetism and the positioning sub-block 41 is attracted to the circular groove 31. Alternatively, the positioning sub-block 41 and the circular groove 31 on the auxiliary positioning ring 4 are configured through the shaft hole and installed in the circular groove 31. That is, a positioning hole is formed on the positioning sub-block 41, and a positioning pin is formed on the top surface or inner wall of the circular groove 31. The positioning hole and the positioning pin are adapted to quickly fix the positioning sub-block 41 in the circular groove 31. Alternatively, the positioning sub-block 41 may not be fixed in any other way, but may be fixed only by the outer ring of the auxiliary positioning ring 4 and the inner wall of the circular groove 31.

[0030] In some embodiments, the support frame includes a base 1, at least three support rods 2, and a top fixing frame 3; the top fixing frame 3 is fixed to the top of the base 1 at intervals by the at least three support rods 2. The circular groove 31 is formed at the top center of the top fixing frame 3; the through hole 32 is formed at the center of the circular groove 31.

[0031] In some embodiments, a support block 11 is fixedly installed in the middle of the base 1, and the support block 11 is used to support the casting 5 to be tested.

[0032] In some embodiments, the number of support rods 2 is three, and the three rods are equidistantly distributed between the base 1 and the top fixing frame 3. The three support rods 2 gradually retract and converge from the base 1 toward the top fixing frame 3.

[0033] In some embodiments, a support block 11 is fixed on the base 1, and the support block 11 is arranged directly below the casting 5 to be tested.

[0034] In some embodiments, the base 1 is provided with a plurality of fixing holes 12 for connecting to the rotary table of the industrial CT machine, for fixing the industrial CT test platform to the rotary table of the industrial CT machine. In some embodiments, the auxiliary positioning ring 4 includes two positioning sub-blocks 41, each of which is semi-circular. When the two positioning sub-blocks 41 are joined together, they form a complete circular outer ring structure. In this embodiment, the specific structure of the auxiliary positioning ring 4 is described in [details omitted]. Figure 4 As shown. In this structure, for the casting 5 to be tested, the structure at the circular groove 31 is relatively uniformly circular, and the auxiliary positioning ring 4 with this circular structure can be used for positioning.

[0035] In some embodiments, the auxiliary positioning ring 4 includes three positioning sub-blocks 41, which are arranged in a 120° fan-shaped ring. When the three positioning sub-blocks 41 are joined together, they form a complete outer circular structure. Disassembling the ring into more positioning sub-blocks 41 allows for better installation.

[0036] In some embodiments, the auxiliary positioning ring 4 includes three positioning sub-blocks 41, which are fan-shaped and not identical. When the three positioning sub-blocks 41 are enclosed, they form a circle with a central angle of less than 360°.

[0037] In some embodiments, the auxiliary positioning ring 4 includes at least three positioning sub-blocks 41. The fan-shaped rings of the multiple positioning sub-blocks 41 are arranged in a circle with a central angle of less than 360°, and the inner diameter of each positioning sub-block 41 is different. In this structure, the auxiliary positioning ring 4 with this structure can be used for positioning of castings 5 ​​to be tested that have a relatively complex structure and variable dimensions at the circular groove 31. The fan-shaped rings of the multiple positioning sub-blocks 41 are arranged in a circle with a central angle of less than 360°, and the inner diameter of each positioning sub-block 41 is different, allowing for free combination to position the side of the castings 5 ​​to be tested.

[0038] In some embodiments, there are multiple auxiliary positioning rings 4, and the inner diameters of the positioning sub-blocks 41 on all auxiliary positioning rings 4 are not exactly the same.

[0039] In some embodiments, the product element of the casting to be tested 5 is a limiting groove, and the positioning element on the auxiliary positioning ring 4 is the top and bottom surfaces on the same positioning sub-block 41, with the top and bottom surfaces on the same positioning sub-block 41 embedded in the limiting groove. And / or, the product element of the casting to be tested 5 is a limiting block, and the positioning element on the auxiliary positioning ring 4 is the side of two adjacent positioning sub-blocks 41, and the side of the two adjacent positioning sub-blocks 41 respectively abuts against the two sides of the limiting block. And / or, the product element of the casting to be tested 5 is a limiting hole, and the positioning element on the auxiliary positioning ring 4 is two parallel planes of the positioning sub-block 41, and the two parallel planes abut against the inner wall of the limiting hole. And / or, the product element of the casting to be tested 5 is a plane of the casting to be tested 5, and the positioning element on the auxiliary positioning ring 4 is a plane of the positioning sub-block 41, with the two planes abutting each other.

[0040] The present invention has a simple structure and low equipment cost. At the same time, the present invention uses an auxiliary positioning ring 4 to position the casting 5 to be tested (i.e., irregular long aluminum casting). Compared with the traditional CT scanning platform, which requires electric control to clamp the casting 5 to be tested, the present invention does not consume electricity during the positioning process, is more energy-efficient, and has a faster positioning speed. Meanwhile, the industrial CT testing platform in this invention has a simple structure, fast positioning, and is easy and practical to operate, providing a strong basis for mass production.

[0041] The auxiliary positioning ring 4 in this invention can be configured in different configurations, making it perfectly suitable for a variety of different irregular-shaped long aluminum castings. Moreover, the configuration change operation of the auxiliary positioning ring 4 is simple; just place the appropriate positioning sub-block 41 in the set position of the circular groove 31.

[0042] In another aspect, the present invention provides a testing method for an industrial CT testing platform, comprising the following steps: S1. Pass the first end of the casting to be tested 5 through the through hole 32, and use the positioning sub-block 41 corresponding to the size of the casting to be tested 5 at the circular groove 31 to position the casting to be tested 5, so that the current scanning area on the casting to be tested 5 is located within the effective space of CT detection; then perform industrial CT scanning detection on the casting to be tested 5 within the effective space of CT detection to obtain the CT scan result of the first end of the casting to be tested 5. S2. Pass the second end of the casting to be tested 5 through the through hole 32, and use the positioning sub-block 41 corresponding to the size of the casting to be tested 5 at the circular groove 31 to position the casting to be tested 5, so that the current scanning area on the casting to be tested 5 is located within the effective space of CT detection; then perform industrial CT scanning detection on the casting to be tested 5 within the effective space of CT detection again to obtain the CT scan result of the second end of the casting to be tested 5. S3. The CT scan results of the first head of the casting 5 to be tested and the CT scan results of the second head of the casting 5 to be tested are stitched together to form a complete CT scan image of the casting 5 to be tested.

[0043] The testing method provided by this invention disassembles the casting to be tested 5 into a first head and a second head, and performs CT scans on each head separately. During each CT scan, the unobstructed head of the irregular long aluminum casting is scanned. Compared with the traditional method of using clamps to clamp the irregular long aluminum casting before CT scanning, this invention does not produce scanning blind spots during the CT scan process and has high scanning accuracy. After two scans are completed, the CT scan results of the first end and the CT scan results of the second end of the casting 5 under test can be stitched together to achieve a complete scan of the long casting 5 under test.

[0044] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. An industrial CT testing platform for irregularly shaped long aluminum castings, characterized in that, include: The support frame has a circular groove (31) on the top, and a through hole (32) for vertically accommodating the casting (5) to be tested. The middle part of the support frame forms an effective space for CT detection. The auxiliary positioning ring (4) is housed in the circular groove (31) of the support frame and includes at least two positioning sub-blocks (41). Each positioning sub-block (41) has a fan-shaped ring structure. The outer diameter of the positioning sub-block (41) is consistent with the inner diameter of the circular groove (31). When all the positioning sub-blocks (41) are enclosed, they form a positioning hole that matches the through hole (32) and a positioning element that matches the product element of the casting to be tested (5) so as to realize the positioning of the casting to be tested (5).

2. The industrial CT testing platform for irregularly shaped long aluminum castings according to claim 1, characterized in that, The support frame includes a base (1), at least three support rods (2) and a top fixing frame (3); the top fixing frame (3) is fixed to the top of the base (1) at intervals by the at least three support rods (2); the circular groove (31) is opened at the middle position of the top of the top fixing frame (3); the through hole (32) is opened at the middle position of the circular groove (31).

3. The industrial CT testing platform for irregularly shaped long aluminum castings according to claim 2, characterized in that, The number of support rods (2) is three, and the three rods are equally spaced between the base (1) and the top fixing frame (3). The three support rods (2) gradually converge from the base (1) towards the top fixing frame (3).

4. An industrial CT testing platform for irregularly shaped long aluminum castings according to claim 3, characterized in that, A support block (11) is fixed on the base (1), and the support block (11) is arranged directly below the casting (5) to be tested.

5. An industrial CT testing platform for irregularly shaped long aluminum castings according to claim 1, characterized in that, The auxiliary positioning ring (4) includes two positioning sub-blocks (41), which are semi-circular. The two positioning sub-blocks (41) together form a complete circular structure on the outer ring.

6. The industrial CT testing platform for irregularly shaped long aluminum castings according to claim 1, characterized in that, The auxiliary positioning ring (4) includes three positioning sub-blocks (41), which are fan-shaped rings of 120°. The three positioning sub-blocks (41) together form a complete outer circular structure.

7. An industrial CT testing platform for irregularly shaped long aluminum castings according to claim 1, characterized in that, The auxiliary positioning ring (4) includes at least three positioning sub-blocks (41). The fan-shaped rings of the multiple positioning sub-blocks (41) together form a circle with a central angle of less than 360°. The inner diameter of each positioning sub-block (41) is different.

8. An industrial CT testing platform for irregularly shaped long aluminum castings according to claim 1, characterized in that, There are multiple auxiliary positioning rings (4), and the inner diameters of the positioning sub-blocks (41) on all the auxiliary positioning rings (4) are not exactly the same.

9. An industrial CT testing platform for irregularly shaped long aluminum castings according to claim 1, characterized in that, The product element of the casting to be tested (5) is a limiting groove, and the positioning element on the auxiliary positioning ring (4) is the top and bottom surface of the same positioning sub-block (41), and the top and bottom surface of the same positioning sub-block (41) is embedded in the limiting groove. And / or, the product element of the casting to be tested (5) is a limiting block, and the positioning element on the auxiliary positioning ring (4) is the side of two adjacent positioning sub-blocks (41), and the side of the two adjacent positioning sub-blocks (41) respectively abuts against the two sides of the limiting block. And / or, the product element of the casting to be tested (5) is a limiting hole, and the positioning element on the auxiliary positioning ring (4) is two parallel planes of the positioning sub-block (41), and the two parallel planes abut against the inner wall of the limiting hole. And / or, the product element of the casting to be tested (5) is a plane of the casting to be tested (5), and the positioning element on the auxiliary positioning ring (4) is a plane of the positioning sub-block (41), and the two planes abut against each other.

10. A testing method for an industrial CT testing platform according to any one of claims 1 to 8, characterized in that, Includes the following steps: S1. Pass the first end of the casting to be tested (5) through the through hole (32), and use the positioning sub-block (41) corresponding to the size of the casting to be tested (5) at the circular groove (31) to position the casting to be tested (5) so that the current scanning area on the casting to be tested (5) is located within the effective space of CT detection; then perform industrial CT scanning detection on the casting to be tested (5) within the effective space of CT detection to obtain the CT scan result of the first end of the casting to be tested (5); S2. Pass the second end of the casting to be tested (5) through the through hole (32), and use the positioning sub-block (41) corresponding to the size of the casting to be tested (5) at the circular groove (31) to position the casting to be tested (5) so that the current area to be scanned on the casting to be tested (5) is located within the effective space of CT detection. Then, the casting (5) under test within the effective space of the CT detection is scanned again by industrial CT to obtain the CT scan result of the second head of the casting (5); S3. The CT scan results of the first end of the casting (5) to be tested and the CT scan results of the second end of the casting (5) to be tested are spliced ​​together to form a complete CT scan image of the casting (5) to be tested.

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