Standard tensile sample test fixture for industrial CT (Computed Tomography)

Abstract

The utility model belongs to the technical field of industrial CT (Computed Tomography) scanning equipment, and particularly relates to a standard tensile sample test fixture for industrial CT, which comprises a bottom bearing disc and a positioning and supporting system, the positioning and supporting system comprises a bottom supporting ring, a top supporting ring, a positioning and supporting column, a positioning bolt and a gasket. At least three positioning support columns are vertically fixed on the upper surface of the bottom bearing disc; a plurality of positioning supporting column through threaded holes are formed in the positioning supporting column, and a plurality of supporting ring through threaded holes are uniformly formed in the supporting ring; the positioning bolt is in threaded fit with the supporting ring through threaded hole and the positioning supporting column through threaded hole in sequence from outside to inside; and the inner end of the positioning bolt is rotationally connected with a gasket. The test clamp can quickly clamp various standard tensile samples, ensures that shaking and loosening do not occur in the circumferential rotation process, and has good applicability to samples with large sizes and weights and samples with complex shapes.

Description

Technical Field

[0001] The utility model belongs to the technical field of industrial CT scanning equipment, and particularly relates to a standard tensile specimen testing fixture for industrial CT. Background Art

[0002] Industrial CT (X-ray three-dimensional dimension measurement system) is a non-destructive testing device that uses the principle that the energy of X-rays is weakened when penetrating an object to detect detailed information inside the object. Industrial CT systems are generally composed of a ray source, a mechanical scanning motion system, a scanning and imaging system, and a computer. The mechanical scanning motion system is controlled by a computer, and during the detection process, the stage or fixture loaded with the sample to be tested is rotated through a turntable.

[0003] Standard tensile specimens are a common type of industrial CT test specimens. Due to standards and customer requirements, it is usually necessary to use industrial CT to check whether the internal defect content, size and volume of the specimen are qualified before the mechanical tensile test. Standard tensile specimens have a variety of specifications and shapes. The commonly used industrial CT stages and fixtures can only carry the specimens. Larger specimens cannot be placed stably, and there is a shaking problem during the sample rotation test, resulting in a decrease in test accuracy. Therefore, a fixture that can both carry and effectively fix the sample is needed to help complete the industrial CT test of tensile specimens of various specifications. Utility Model Content

[0004] The utility model aims to provide a standard tensile specimen test fixture for industrial CT, characterized in that the fixture comprises a bottom bearing plate and a positioning support system; a positioning support system consisting of a bottom support ring, a top support ring, a plurality of positioning support columns, a plurality of positioning bolts and a plurality of gaskets is vertically fixed on the upper surface of the bottom bearing plate to form a receiving space for vertically clamping the sample to be tested; the lower surface of the bottom bearing plate is connected to the industrial CT equipment;

[0005] The bottom support ring and the top support ring are fixed at both ends of the multiple positioning support columns respectively; the positioning support columns are distributed at equal distances on the inner circumference of the fixed bottom support ring and the top support ring; the number of the multiple positioning support columns is at least 3; and each positioning support column is provided with a plurality of positioning support column through threaded holes of the same specifications along the axial center line;

[0006] The bottom support ring and the top support ring are evenly provided with a plurality of support ring through-threaded holes of the same specification, and the number of the support ring through-threaded holes is the same as the number of the positioning support columns; the positioning bolts are threadedly matched with the support ring through-threaded holes and the positioning support column through-threaded holes in sequence from the outside to the inside;

[0007] The bottom support ring and the top support ring are detachably and vertically fixedly connected to the positioning support column by means of positioning bolts;

[0008] A gasket is installed at the inner end of the positioning bolt through a rotation connection; the inner surface of the gasket is in direct contact with the standard tensile specimen; the gasket is a thin sheet with a certain geometric shape, and the material of the gasket is a material with low absorption of X-rays.

[0009] The number of the positioning support columns is 4, including: a first positioning support column, a second positioning support column, a third positioning support column and a fourth positioning support column; the 4 positioning support columns are distributed in a cross shape on the upper surface of the bottom supporting plate.

[0010] The number of support rings of the positioning support system is greater than 2.

[0011] The material with low X-ray absorption is high-strength plastic.

[0012] Foam is inserted between the gasket and the standard tensile test specimen.

[0013] The gasket is in the shape of a flat thin plate.

[0014] The standard tensile specimen is embedded and fixed in a solid foam, and the solid foam is clamped by using a gasket. The solid foam is in a cylindrical or prismatic shape.

[0015] The lower surface of the bottom supporting plate is connected to the industrial CT equipment via a protruding fixed cylinder.

[0016] The beneficial effects of the utility model are:

[0017] 1. The bottom carrier plate is connected to the turntable of the CT equipment through a raised cylinder. The turntable can be controlled by a computer to drive the fixture to rotate, so that the sample can be tested in all directions and at multiple angles;

[0018] 2. The top support ring can be disassembled and adjusted, and the height of the top support ring can be raised or lowered to accommodate standard tensile samples of different heights;

[0019] 3. By adjusting the screw-in depth of different bolts, specimens of various shapes can be effectively fixed to prevent the specimens from shaking and slipping during the test.

[0020] 4. The purpose of setting the gasket is to prevent the pressure of the bolt directly contacting the sample from being too high, which may cause the surface of the sample to be damaged. The size and geometric shape of the gasket can be changed according to the actual situation to adapt to various shapes of samples to be tested, which has strong practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the structure of a standard tensile specimen test fixture for industrial CT of the utility model;

[0022] Figure 2This is a schematic diagram of the main view of a standard tensile specimen test fixture for industrial CT of the utility model;

[0023] Figure 3 This is a top view schematic diagram of a standard tensile specimen test fixture for industrial CT of the utility model;

[0024] Figure 4 This is a schematic diagram of a top view of a standard tensile specimen test fixture for industrial CT of the utility model and a schematic diagram of a cross section at the AA section;

[0025] Figure 5 This is a schematic structural diagram of a raised cylinder at the bottom of a standard tensile specimen test fixture for industrial CT according to the utility model;

[0026] Figure 6 It is a schematic diagram of a top view of a rod-shaped standard tensile specimen clamped in one embodiment of the utility model;

[0027] Figure 7 It is a front view structural schematic diagram of a clamping rod-shaped standard tensile specimen in one embodiment of the utility model.

[0028] in:

[0029] 1-Bottom carrier plate;

[0030] 21- bottom support ring; 22- top support ring;

[0031] 31-first positioning support column; 32-second positioning support column; 33-third positioning support column; 34-fourth positioning support column;

[0032] 411-first positioning bolt; 421-second positioning bolt; 431-third positioning bolt; 441-fourth positioning bolt; 412-fifth positioning bolt; 422-sixth positioning bolt; 432-seventh positioning bolt; 442-eighth positioning bolt;

[0033] 511-first gasket; 521-second gasket; 531-third gasket; 541-fourth gasket; 512-fifth gasket; 522-sixth gasket; 532-seventh gasket; 542-eighth gasket; DETAILED DESCRIPTION

[0034] The utility model provides a standard tensile specimen testing fixture for industrial CT. The utility model is further described in detail below in conjunction with the accompanying drawings.

[0035] like Figure 1The embodiment of the utility model shown discloses a standard tensile specimen test fixture for industrial CT, which includes a bottom carrier plate 1 and a positioning support system; a positioning support system consisting of a bottom support ring 21, a top support ring 22, a plurality of positioning support columns, a plurality of positioning bolts and a plurality of gaskets is vertically fixed on the upper surface of the bottom carrier plate 1 to form a receiving space for vertically clamping the sample to be tested; the lower surface of the bottom carrier plate 1 is connected to the industrial CT equipment;

[0036] The bottom support ring 21 and the top support ring 22 are fixed at both ends of the multiple positioning support columns respectively; the positioning support columns are equidistantly distributed on the inner circumference of the bottom support ring 21 and the top support ring 22; the number of the multiple positioning support columns is at least 3; and each positioning support column is provided with a plurality of positioning support column through threaded holes of the same specifications along the axial centerline;

[0037] The bottom support ring 21 and the top support ring 22 are evenly provided with a plurality of support ring through-threaded holes of the same specification, and the number of the support ring through-threaded holes is the same as the number of the positioning support columns; the positioning bolts are threadedly matched with the support ring through-threaded holes and the positioning support column through-threaded holes in sequence from the outside to the inside;

[0038] The bottom support ring 21 and the top support ring 22 are detachably and vertically fixedly connected to the positioning support column by means of positioning bolts;

[0039] A gasket is installed at the inner end of the positioning bolt through a rotation connection; the inner surface of the gasket is in direct contact with the standard tensile specimen; the gasket is a thin sheet with a certain geometric shape, and the material of the gasket is a material with low absorption of X-rays.

[0040] By adjusting the position of the top support ring, selecting the threaded hole that matches the sample size, adjusting the screwing depth of the bolt, and changing the shape of the gasket, the positioning support system can be used to clamp standard tensile samples of various shapes and sizes.

[0041] The following is a specific embodiment of a standard tensile specimen test fixture for industrial CT disclosed in the utility model, which includes four positioning support columns. The four positioning support columns are: a first positioning support column 31, a second positioning support column 32, a third positioning support column 33, and a fourth positioning support column 34;

[0042] like Figure 3 , Figure 4 and Figure 7 A fixture structure including four positioning support columns is shown. In this embodiment, the four positioning support columns form a receiving space for receiving a standard tensile specimen.

[0043] In this embodiment, the positioning support columns are thin plates with a certain thickness, which are vertically fixed and distributed on the upper surface of the bottom supporting plate 1, and the distance from the center point of the positive projection of each positioning support column on the bottom supporting plate 1 to the center of the bottom supporting plate 1 is equal.

[0044] The positioning support column is provided with linearly arranged positioning support column through threaded holes along the central axis. The positioning support column through threaded holes should be able to cooperate with the positioning bolts. The number and distribution interval of the positioning support column through threaded holes should be determined according to the limit size of the test sample, such as Figure 2 As shown in the figure, a positioning support column with 9 threaded holes is shown.

[0045] In an optional embodiment, according to the requirements of the standard tensile specimen, a corresponding number of positioning support columns can be selected, such as three or five.

[0046] In this embodiment, the lower surface of the bottom carrier plate 1 is connected to the industrial CT equipment, and the bottom carrier plate 1 cooperates with the turntable of the industrial CT equipment. When the turntable rotates, it can drive the standard tensile specimen test fixture for industrial CT to rotate. In an optional embodiment, Figure 5 As shown, the lower surface of the bottom supporting plate 1 is connected to the industrial CT equipment via a protruding fixed cylinder.

[0047] In this embodiment, the bottom support ring 21 and the top support ring 22 have exactly the same shape, size and material; the bottom support ring 21 and the top support ring 22 have exactly the same support ring through-threaded holes, the number of threaded holes is the same as the number of positioning support columns, and the support ring through-threaded holes can cooperate with the positioning bolts.

[0048] In this embodiment, when the number of the positioning support columns is four, four support ring through threaded holes distributed in a cross shape are provided on the side surfaces of the bottom support ring 21 and the top support ring 22 .

[0049] In an optional embodiment, according to the requirements of the standard tensile specimen, the number of support rings of the positioning support system is greater than 2, so as to increase the stability of the standard tensile specimen test fixture for industrial CT disclosed by the utility model.

[0050] The positioning bolts are threadedly matched with the through threaded holes of the support ring and the through threaded holes of the positioning support column in sequence from outside to inside; the bottom support ring 21 and the top support ring 22 are detachably and vertically fixedly connected to the positioning support column by the positioning bolts;

[0051] The inner surfaces of the bottom support ring 21 and the top support ring 22 respectively coincide with the outer surfaces of the positioning support column; the centers of the through-threaded holes of the support ring and the through-threaded holes of the positioning support column at the corresponding positions are axially colinear; the bottom support ring 21 and the top support ring 22 are detachably and vertically fixedly connected to the positioning support column by positioning bolts at the through-threaded holes of the support rings;

[0052] In this embodiment, the top support ring 22 can be disassembled and adjusted by screwing the bolts, and the top support ring 22 is installed at the corresponding threaded hole position of the positioning support column through the positioning bolts according to the sample height;

[0053] A gasket is installed at the inner end of the positioning bolt through a rotation connection; the inner surface of the gasket is in direct contact with the standard tensile specimen;

[0054] In this embodiment, the positioning support column is connected to the bottom support ring 21 by positioning bolts, the standard tensile specimen is placed in the center of the bottom supporting plate, and a gasket is put on the end of the positioning bolt; according to the shape of the specimen, the positioning bolt connected to the bottom support ring is first tightened until the gasket contacts the surface of the specimen and has a certain pressure, and after ensuring that the bottom of the specimen is effectively fixed, the appropriate threaded hole position on the positioning support column is selected according to the height of the specimen, the top support ring 22 is aligned with the selected threaded hole height and connected by positioning bolts, and a gasket is also put on the end of the positioning bolt, and the bolt is continuously tightened until the gasket contacts the side surface of the specimen and has a certain pressure.

[0055] In this embodiment, all the positioning bolts have the same hole diameter and thread diameter as the through threaded holes of the support ring and the through threaded holes of the positioning support column.

[0056] In this embodiment, the positioning bolt is a standard bolt with a certain length, and the positioning bolt should be able to cooperate with the corresponding threaded holes of the positioning support column, the bottom support ring 21 and the top support ring 22; in this embodiment, four positioning support columns are included, so corresponding to the four support ring through-threaded holes of the bottom support ring 21, the first positioning bolt 411, the second positioning bolt 421, the third positioning bolt 431 and the fourth positioning bolt 441 are used to respectively realize a detachable fixed connection with the first positioning support column 31, the second positioning support column 32, the third positioning support column 33 and the fourth positioning support column 34; corresponding to the four support ring through-threaded holes of the top support ring 22, the fifth positioning bolt 412, the sixth positioning bolt 422, the seventh positioning bolt 432 and the eighth positioning bolt 442 are used to respectively realize a detachable fixed connection with the first positioning support column 31, the second positioning support column 32, the third positioning support column 33 and the fourth positioning support column 34.

[0057] The gasket is a thin sheet with a certain geometric shape, and the material of the gasket is a material with low absorption of X-rays.

[0058] In this embodiment, the gasket is a thin sheet with a certain geometric shape, and the thin sheet must be made of a material with low X-ray absorption, such as high-strength plastic; the size and shape of the gasket can be changed according to the shape and type of the sample; the gasket has a threaded barrel that can cooperate with the positioning bolt, and is sleeved on the end of the positioning bolt through threaded cooperation.

[0059] In this embodiment, a first gasket 511, a second gasket 521, a third gasket 531 and a fourth gasket 541 are respectively provided at the ends of the first positioning bolt 411, the second positioning bolt 421, the third positioning bolt 431 and the fourth positioning bolt 441; a fifth gasket 512, a sixth gasket 522, a seventh gasket 532 and an eighth gasket 542 are respectively provided at the ends of the fifth positioning bolt 412, the sixth positioning bolt 422, the seventh positioning bolt 432 and the eighth positioning bolt 442.

[0060] In an optional embodiment, for a plate-shaped tensile specimen, the shape of the gasket may be changed to a flat thin plate, that is, a thin plate without curvature, so that the specimen can be clamped only in the radial direction.

[0061] In an optional embodiment, foam is inserted between the gasket and the standard tensile specimen to reduce the pressure of bolt tightening and reduce the influence of the bolt and gasket on the accuracy of the CT scanning test result.

[0062] In an optional embodiment, the shape and size of the gasket are adjusted accordingly according to the shape and size of the standard tensile specimen.

[0063] In an optional embodiment, considering that the fixture may absorb X-rays during the rotation test or block the sample to a certain extent, materials with low X-ray absorption, such as high-strength plastic, should be selected when manufacturing the fixture. For long and heavy specimens, the combination of bolts and gaskets alone is not enough to support the specimen without shaking during rotation. At this time, it can be considered to cut out a corresponding space in the cylindrical or prismatic solid foam according to the shape of the specimen, and the specimen can be fixed in the foam, and the foam can be squeezed tightly with a gasket to achieve the purpose of effective fixation. Since the foam absorbs almost no energy during CT scanning, this part can be easily filtered when processing data, and the foam can be filled as much as possible in the cylindrical space inside the fixture to shorten the depth of the bolts, which can also effectively reduce the impact of the fixture on the accuracy of the scanning results.

[0064] In summary, if Figure 6 and Figure 7As shown, a fixture for detecting standard tensile samples for industrial CT disclosed in the utility model is used to perform CT scanning tests on rod-shaped standard tensile samples. The gaskets should be clamped at both ends of the sample as much as possible so that the sample has a larger scannable range. By adjusting the position of the top support ring, selecting the threaded hole that matches the size of the sample, adjusting the screw-in depth of the bolt, and changing the shape of the gasket, the positioning support system can be used to clamp various standard tensile samples of different shapes and sizes. The fixture for clamping the sample is connected to the industrial CT turntable through the raised cylinder on the lower surface of the bottom carrier plate 1 to test the sample to be tested.

Claims

1. A standard tensile specimen test fixture for industrial CT, characterized in that: The clamp comprises a bottom bearing plate (1) and a positioning support system; the positioning support system consisting of a bottom support ring (21), a top support ring (22), a plurality of positioning support columns, a plurality of positioning bolts and a plurality of gaskets is vertically fixed on the upper surface of the bottom bearing plate (1) to form a receiving space for vertically clamping a sample to be tested; the lower surface of the bottom bearing plate (1) is connected to the industrial CT equipment; The bottom support ring (21) and the top support ring (22) are fixed at both ends of the plurality of positioning support columns; the positioning support columns are distributed at equal distances on the inner circumference of the fixed bottom support ring (21) and the top support ring (22); the number of the plurality of positioning support columns is at least 3; and a plurality of positioning support column through threaded holes of the same specification are provided on each positioning support column along the axial center line; The bottom support ring (21) and the top support ring (22) are evenly provided with a plurality of support ring through-threaded holes of the same specification, and the number of the support ring through-threaded holes is the same as the number of the positioning support columns; the positioning bolts are threadedly matched with the support ring through-threaded holes and the positioning support column through-threaded holes in sequence from the outside to the inside; the bottom support ring (21) and the top support ring (22) are detachably and vertically fixedly connected to the positioning support column by the positioning bolts; a gasket is installed at the inner end of the positioning bolt by a rotation connection; the inner surface of the gasket is in direct contact with the standard tensile test specimen; the gasket is a thin sheet with a certain geometric shape, and the material of the gasket is a material with low absorption of X-rays.

2. The standard tensile specimen test fixture for industrial CT according to claim 1, characterized in that: The number of the positioning support columns is four, including: a first positioning support column (31), a second positioning support column (32), a third positioning support column (33) and a fourth positioning support column (34); the four positioning support columns are distributed in a cross shape on the upper surface of the bottom supporting plate (1).

3. The standard tensile specimen test fixture for industrial CT according to claim 1, characterized in that: The number of support rings of the positioning support system is greater than 2.

4. The standard tensile specimen test fixture for industrial CT according to claim 1, characterized in that: The material with low X-ray absorption is high-strength plastic.

5. The standard tensile specimen test fixture for industrial CT according to claim 1, characterized in that: Foam is inserted between the gasket and the standard tensile test specimen.

6. The standard tensile specimen test fixture for industrial CT according to claim 1, characterized in that: The gasket is in the shape of a flat thin plate.

7. The standard tensile specimen test fixture for industrial CT according to claim 1, characterized in that: The standard tensile specimen is embedded and fixed in a solid foam, and the solid foam is clamped by using a gasket. The solid foam is in a cylindrical or prismatic shape.

8. The standard tensile specimen test fixture for industrial CT according to claim 1, characterized in that: The lower surface of the bottom supporting plate (1) is connected to the industrial CT equipment via a protruding fixed cylinder.

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