CN105842049B - Detection method for improving test precision of fracture toughness of aluminum alloy sheet - Google Patents
Detection method for improving test precision of fracture toughness of aluminum alloy sheet Download PDFInfo
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- CN105842049B CN105842049B CN201610320331.2A CN201610320331A CN105842049B CN 105842049 B CN105842049 B CN 105842049B CN 201610320331 A CN201610320331 A CN 201610320331A CN 105842049 B CN105842049 B CN 105842049B
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- warping
- aluminum alloy
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- alloy sheet
- shaped plates
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/006—Crack, flaws, fracture or rupture
- G01N2203/0067—Fracture or rupture
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/026—Specifications of the specimen
- G01N2203/0262—Shape of the specimen
- G01N2203/0278—Thin specimens
- G01N2203/0282—Two dimensional, e.g. tapes, webs, sheets, strips, disks or membranes
Abstract
The invention relates to a detection method for improving the test precision of fracture toughness of an aluminum alloy sheet, which comprises the following steps: (1) lubricating oil is smeared on the surface of the anti-warping Z-shaped plate of the auxiliary tool, which is in contact with the aluminum alloy sheet; (2) horizontally mounting column-shaped pieces vertical to the horizontal direction of the horizontal plane of one horizontal plate of the Z-shaped plates on 4 columns of a fatigue testing machine, wherein the surfaces of the anti-warping Z-shaped plates coated with lubricating oil are opposite to each other, placing a test sample between the anti-warping Z-shaped plates, adjusting the anti-warping Z-shaped plates to move forwards and backwards through a rotary moving handle to keep a state of being attached to an aluminum alloy sheet pattern, and adjusting the anti-warping Z-shaped plates to move left and right through a rotary sliding support rod to ensure that a central groove of the anti-warping Z-shaped plate and a central hole of the aluminum alloy sheet pattern are in the; (3) and fixing and locking the column-shaped part.
Description
Technical Field
The invention relates to a measuring method of an auxiliary tool for measuring mechanical parts, in particular to a detecting method for improving the testing precision of the fracture toughness of an aluminum alloy sheet.
Background
When measuring the fracture toughness of a kind of samples such as aluminum alloy sheet style, especially sheet metal, because the atress is uneven among the prestretching process, aluminum alloy sheet style all can be crooked usually, warp the deformation of different degrees such as, leads to measurement accuracy to be difficult to guarantee, therefore needs the auxiliary fixtures of installation measurement accuracy on measuring tool, and current measurement accuracy auxiliary fixtures is mostly integral type structure, or reference circle locate mode, and prior art structure is complicated, the installation is inconvenient, it is anxious to detect the precision. Therefore, it is necessary to provide an auxiliary tool for testing precision with a simple and reasonable structure and a simple and easy detection method.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide the auxiliary tool detection method for testing the precision, which is simple and reasonable in structure.
The detection method for improving the test precision of the fracture toughness of the aluminum alloy sheet is characterized by comprising the following steps of:
(1) lubricating oil is smeared on the surface of the anti-warping Z-shaped plate of the auxiliary tool, which is in contact with the aluminum alloy sheet;
(2) horizontally mounting the column-shaped parts vertical to the horizontal direction of the horizontal plane of the horizontal plates on 4 columns of a fatigue testing machine, wherein the surfaces of the anti-warping Z-shaped plates coated with lubricating oil are opposite to each other, placing a test sample between the anti-warping Z-shaped plates, adjusting the anti-warping Z-shaped plates to move forwards and backwards by rotating the moving handle to keep the anti-warping Z-shaped plates in a state of being attached to the aluminum alloy sheet sample, and adjusting the anti-warping Z-shaped plates to move left and right by rotating the sliding support rod to ensure that the central groove of the anti-warping Z-shaped plates and the center hole of the aluminum alloy sheet sample are;
(3) and fixing and locking the column-shaped part.
Further, the auxiliary tool comprises a buckling-preventing Z-shaped plate and a fixing frame formed by at least three column-shaped pieces which are mutually perpendicular; the fixing frame is arranged on one side of a horizontal plate forming the Z-shaped plate in parallel, and a longitudinal part of a column-shaped moving handle (4) forming the fixing frame is fixed on the horizontal plate.
Further, the number of the column members perpendicular to the horizontal direction of the horizontal plane of the horizontal plates is at least 2.
Furthermore, the center of the free side of the other horizontal plate of the Z-shaped plate is provided with a groove.
Further, the column parts constituting the fixing frame are movably connected with each other.
Furthermore, locking parts are arranged among the anti-warping Z-shaped plate, the fixing support, the moving handle and the sliding support rod.
Furthermore, the number of the auxiliary tools is at least 4, and the auxiliary tools are arranged correspondingly to each other.
Compared with the closest prior art, the invention has the beneficial effects that:
1. the auxiliary tool for testing the precision is simple and reasonable in structure.
2. And a detachable installation mode is adopted, so that the installation is more convenient.
3. The rotating manual adjusting type movable handle and the sliding support rod are adopted, so that the operation is simpler and more convenient.
4. The anti-warping Z-shaped plates are arranged oppositely, so that the aluminum alloy sheet style is positioned more accurately, and the aluminum alloy sheet style is prevented from being stressed unevenly in the pre-stretching process.
5. The auxiliary tool for testing the precision can ensure that the aluminum alloy sheet sample is not deformed such as bent and twisted in the testing process, and the measurement precision is ensured.
6. Due to the improvement of the column-shaped component material, the detection precision is improved, and the service life is prolonged.
Drawings
FIG. 1 is a diagram of an auxiliary tool structure for testing accuracy;
FIG. 2 is a simulation diagram of the combination of anti-warping Z-shaped plates.
1-anti-warping Z-shaped plate; 2-fixing the bracket; 3-sliding the support bar; 4-moving the handle.
Detailed Description
When measuring the fracture toughness of samples such as aluminum alloy sheet samples, especially sheets, etc., the aluminum alloy sheet samples usually have different degrees of deformation such as bending, distortion, etc., during the pre-stretching process, so that the measurement accuracy is difficult to ensure, therefore, an auxiliary tool for testing the accuracy is required to be installed on a measuring tool, so as to prevent the aluminum alloy sheet samples from being unevenly stressed during the pre-stretching process, prevent the aluminum alloy sheet samples from being deformed such as bending, distortion, etc., during the test process, and ensure the measurement accuracy.
Detailed description of the preferred embodiment
As shown in FIG. 1, an auxiliary tool for testing precision comprises an anti-warping Z-shaped plate 1 and a fixing frame formed by at least three column-shaped parts which are mutually perpendicular; the fixing frame is arranged on one side of a horizontal plate forming the Z-shaped plate in parallel, and a longitudinal part of a column-shaped moving handle 4 forming the fixing frame 2 is fixed on the horizontal plate. The center of one side edge is provided with a rectangular groove for aligning with the center hole for testing the aluminum alloy sheet pattern. The number of the column-shaped parts perpendicular to the horizontal direction of the horizontal plane of the horizontal plates is at least 2. The other side is symmetrically provided with a movable handle 4 along the direction perpendicular to the central axis of the anti-warping Z-shaped plate 1, the other end of the movable handle 4 penetrates through the fixed support 2, and the sliding support rod 3 penetrates through the fixed support 2 along the direction perpendicular to the movable handle 4 and is positioned below the movable handle 4. Prevent swing joint and be equipped with the retaining member between warpage Z shaped plate 1, fixed bolster 2, removal handle 4 and the sliding support pole 3, the figure of auxiliary fixtures is 4 at least, corresponds the setting each other. The fixing support 2 is made of the following materials in percentage by mass: c, 0.85-0.95; 1.20-1.60% of Si; 0.30-0.60% of Mn; 0.95-1.25% of Cr; p is less than or equal to 0.030, S is less than or equal to 0.030, the allowable residual content of Ni is less than or equal to 0.25, the allowable residual content of Cu is less than or equal to 0.030, and the balance is iron. The moving handle 4 is made of the following materials in percentage by mass: c, 0.95-1.10; si is less than or equal to 0.40; mn is less than or equal to 0.40; 1.30-1.65 parts of Cr; p is less than or equal to 0.030; less than or equal to 0.030S and the balance of Fe.
Detailed description of the invention
Fig. 2 shows a simulation diagram of a combination of anti-warp Z-shaped plates, and 4 anti-warp Z-shaped plates are installed and combined in a rectangular shape. Firstly, lubricating oil is smeared on the surface of the anti-warping Z-shaped plate, which is in contact with the aluminum alloy sheet pattern, of the auxiliary tool, polytetrafluoroethylene plastic film or heavy oil can be used, or the polytetrafluoroethylene plastic film and the heavy oil can be used simultaneously, and friction between the tested aluminum alloy sheet pattern and the auxiliary tool is reduced.
8 fixing supports 2 of the auxiliary tool are horizontally arranged on 4 upright posts of a fatigue testing machine, surfaces of 4 anti-warping Z-shaped plates 1, which are coated with lubricating oil, are opposite to each other, a test sample is placed between the surfaces and the pattern of the aluminum alloy sheet is ensured to be straight, the anti-warping Z-shaped plates 1 are adjusted to move forwards and backwards by rotating the moving handle 4 to keep a state of being tightly attached to the pattern of the aluminum alloy sheet, the anti-warping Z-shaped plates 1 are adjusted to move leftwards and rightwards by rotating the sliding support rod 3 to ensure that a central groove of the anti-warping Z-shaped plates 1 and a central hole of the pattern of the aluminum alloy sheet are at the same position, deformation such as bending or twisting of the pattern of the aluminum alloy sheet is prevented, load.
And finally, the fixed support 2, the movable handle 4 and the sliding support rod 3 are fixedly locked through the spiral bolt. The thickness and width of the aluminum alloy sheet pattern were measured in the direction of crack propagation of the aluminum alloy sheet pattern. The thickness is measured at least at three positions, the arithmetic mean value is taken, the measurement quantity is accurate to 1% B, and the measurement of the width is accurate to 0.5% W. Whether the aluminum alloy sheet pattern has buckling or whether large friction exists between the aluminum alloy sheet pattern devices can be checked by an unloading line and a loading line in a linear stage, when the difference of the slopes exceeds 2%, the aluminum alloy sheet pattern needs to be adjusted until the slope is less than 2%, the measurement result is recorded, and the measurement is finished.
The preferred embodiments of the present invention have been described herein by way of example only, and are not intended to limit the scope, applicability, or configuration of the invention. Rather, the detailed description of the embodiments is presented to enable any person skilled in the art to make and use the embodiments. It will be understood that various changes and modifications in detail may be effected therein without departing from the spirit and scope of the invention as defined by the appended claims.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application and not for limiting the protection scope thereof, and although the present application is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: numerous variations, modifications, and equivalents will occur to those skilled in the art upon reading the present application and are within the scope of the claims appended hereto.
Claims (3)
1. The detection method for improving the test precision of the fracture toughness of the aluminum alloy sheet is characterized by comprising the following steps of:
(1) lubricating oil is smeared on the surface of the anti-warping Z-shaped plate of the auxiliary tool, which is in contact with the aluminum alloy sheet;
(2) horizontally mounting column-shaped pieces vertical to the horizontal direction of the horizontal plane of one horizontal plate of the Z-shaped plates on 4 columns of a fatigue testing machine, wherein the surfaces of the anti-warping Z-shaped plates coated with lubricating oil are opposite to each other, placing a test sample between the anti-warping Z-shaped plates, adjusting the anti-warping Z-shaped plates to move forwards and backwards through a rotary moving handle to keep a state of being attached to an aluminum alloy sheet pattern, and adjusting the anti-warping Z-shaped plates to move left and right through a rotary sliding support rod to ensure that a central groove of the anti-warping Z-shaped plate and a central hole of the aluminum alloy sheet pattern are in the;
(3) fixing and locking the column element; the auxiliary tool comprises the anti-warping Z-shaped plate and a fixing frame formed by at least three column-shaped pieces which are mutually perpendicular; the fixing frame is arranged on one side of a horizontal plate forming the Z-shaped plate in parallel, and a longitudinal part of a columnar moving handle (4) forming the fixing frame is fixed on the horizontal plate; a groove is formed in the center of the free side of the other horizontal plate of the Z-shaped plate; the column-shaped parts forming the fixing frame are movably connected with each other; locking parts are arranged among the anti-warping Z-shaped plate, the fixing support, the moving handle and the sliding supporting rod.
2. The method for testing the accuracy of the fracture toughness test of the aluminum alloy sheet as claimed in claim 1, wherein the number of the columnar members arranged in the horizontal direction of the horizontal plane of the horizontal plate is at least 2.
3. The method for detecting the improvement of the test accuracy of the fracture toughness of the aluminum alloy sheet as recited in any one of claims 1 to 2, wherein the number of the auxiliary tools is at least 4, and the auxiliary tools are arranged corresponding to each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610320331.2A CN105842049B (en) | 2016-05-13 | 2016-05-13 | Detection method for improving test precision of fracture toughness of aluminum alloy sheet |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610320331.2A CN105842049B (en) | 2016-05-13 | 2016-05-13 | Detection method for improving test precision of fracture toughness of aluminum alloy sheet |
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| Publication Number | Publication Date |
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| CN105842049A CN105842049A (en) | 2016-08-10 |
| CN105842049B true CN105842049B (en) | 2020-05-22 |
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| CN201610320331.2A Active CN105842049B (en) | 2016-05-13 | 2016-05-13 | Detection method for improving test precision of fracture toughness of aluminum alloy sheet |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109342182A (en) * | 2018-09-19 | 2019-02-15 | 中国航发北京航空材料研究院 | A kind of step sample fatigue test clamper |
| CN111751229B (en) * | 2020-06-23 | 2023-11-10 | 武汉钢铁有限公司 | Method for testing and controlling constant-amplitude cyclic fatigue performance of metal sheet |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2758739Y (en) * | 2004-12-15 | 2006-02-15 | 中国科学院金属研究所 | Clamp for sheet fatigue experiment |
| CN103344480B (en) * | 2013-06-17 | 2015-06-03 | 中国航空工业集团公司北京航空材料研究院 | Device for testing crack growth and residual strength of thin-wall plate with stringers |
| CN103335883B (en) * | 2013-06-24 | 2016-02-03 | 重庆大学 | A kind of auxiliary compression tool for thin plate material and using method |
| CN104048883B (en) * | 2014-03-03 | 2016-08-17 | 四川大学 | The method of testing brittle material dynamic shearing fracture toughness and enforcement device thereof |
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Address after: 100095 Haidian District hot springs town, Beijing Village Applicant after: China Hangfa Beijing Institute of Aerial Materials Address before: 100095 Haidian District hot springs town, Beijing Village Applicant before: Beijing Institute of Aeronautical Materials, China Aviation Industry Group Corporation |
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Inventor after: Wu Xiuliang Inventor after: Lu Yuan Inventor after: Chen Gaohong Inventor after: Li Huiqu Inventor after: Ru Jigang Inventor after: Dai Shenglong Inventor before: Wu Xiuliang Inventor before: Lu Yuan Inventor before: Chen Gaohong Inventor before: Li Huiqu Inventor before: Ru Jigang |
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