CN107560906B - Tensile strength test sample centering device - Google Patents
Tensile strength test sample centering device Download PDFInfo
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- CN107560906B CN107560906B CN201710741877.XA CN201710741877A CN107560906B CN 107560906 B CN107560906 B CN 107560906B CN 201710741877 A CN201710741877 A CN 201710741877A CN 107560906 B CN107560906 B CN 107560906B
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Abstract
The invention belongs to the field of performance detection, and particularly relates to a centering device for a tensile strength test sample. Comprises a large sleeve, a small sleeve and a positioning ring. Big small sleeve is cylindric structure, and inside is notch cuttype blind hole structure, and the blind hole bottom is threaded hole structure. The positioning ring is of a circular ring structure, the inner diameter of the positioning ring is consistent with the outer diameter of the bonding test column, the length of the positioning ring is larger than the thickness of a bonded test sample, a groove for glue overflow is formed in the inner part of the circular ring along the length direction of the circular ring, and a release agent is coated on the inner surface of the circular ring; the test piece is vertically placed, then the large sleeve of the centering device is sleeved on the test piece from top to bottom, the large sleeve is turned and then is arranged in the positioning ring, and the small sleeve is sleeved on the test piece from top to bottom. The tensile strength detection is a common test method for the bonding strength, the tensile strength test sample centering device reduces the preparation difficulty of a test piece, ensures the coaxiality of the test piece, improves the reliability of detection data, and provides powerful technical support for the adhesive bonding performance test of materials with different thicknesses in a vacuum pumping loading state.
Description
Technical Field
The invention belongs to the field of performance detection, and particularly relates to a centering device for a tensile strength test sample.
Background
Compared with the traditional connecting technologies such as mechanical connection, welding and the like, the bonding part adopting the adhesive has the advantages of light structural mass, smooth surface, small stress concentration, fatigue resistance, good sealing performance and the like, and gradually becomes the main form for connecting the thermal protection system and the bearing structure in the aerospace field. According to experimental verification, the gluing strength can be increased by applying a certain pressure along the gluing direction in the gluing process. In the actual operation process, the vacuumizing loading operation is convenient, and the loading force is uniform, so that the method is a common method for bonding and loading the thermal protection component.
The bonding strength of the thermal protection system and the bearing structure is an important index in the heat insulation prevention technology of the supersonic aircraft, and actual detection data is needed to be used as the basis for determining the bonding quality. Because the detection of the bonding strength is destructive test, the performance detection is generally carried out by replacing an actual product with a test piece manufactured synchronously with the same process method.
The tensile strength is a commonly used determining parameter for the adhesive bonding performance, and the structural form of a test sample is shown in fig. 1. Different test specimens can affect the accuracy of the test results and so GB 5210 also provides a centering device. However, in the vacuum-pumping loading state, the bonded sample can be stressed in all directions, and the coaxiality of the sample cannot be ensured by the centering device. Therefore, a simple and reliable tensile strength test sample centering device suitable for different thicknesses of bonding materials in a vacuum pumping loading state is found, and the centering device has great significance for reducing the preparation difficulty of the sample and improving the reliability of test data.
Disclosure of Invention
The invention mainly aims to provide a tensile strength test sample centering device which is suitable for bonding materials with different thicknesses in a vacuum pumping loading state and ensures the coaxiality of bonded test samples.
In order to achieve the purpose, the invention provides the following technical scheme:
a centering device for a tensile strength test sample comprises a large sleeve, a small sleeve and a positioning ring.
Big sleeve is cylindric structure, and inside is notch cuttype blind hole structure, and the blind hole bottom is threaded hole structure, and the surface has the small circle hole that is used for the gas overflow of a plurality of along sleeve diameter direction, internal surface coating release agent. The large sleeve comprises a large inner diameter and a small inner diameter, the large inner diameter is consistent with the outer diameter of the small sleeve, and the small inner diameter is consistent with the outer diameter of the bonding sample.
The small sleeve is also of a cylindrical-shaped and internal stepped blind hole structure, the bottom end of the blind hole is of a threaded hole structure, and the inner surface of the blind hole is coated with a release agent. The small sleeve comprises a large inner diameter and a small inner diameter, the large inner diameter is larger than the outer diameter of the positioning ring, and the small inner diameter is consistent with the outer diameter of the bonding sample.
The positioning ring is of a circular ring structure, the inner diameter of the positioning ring is consistent with the outer diameter of the bonding test column, the length of the positioning ring is larger than the thickness of a bonded material, a groove for glue overflow is designed in the circular ring along the length direction of the circular ring, and a release agent is coated on the inner surface of the circular ring.
The test piece is vertically placed, then the large sleeve of the centering device is sleeved on the test piece from top to bottom, the large sleeve is turned and then is arranged in the positioning ring, and the small sleeve is sleeved on the test piece from top to bottom.
Advantageous effects
The tensile strength detection is a common test method for the bonding strength, the tensile strength test sample centering device reduces the preparation difficulty of the test piece, ensures the coaxiality of the test piece, improves the reliability of detection data, provides powerful technical support for the adhesive bonding performance test of materials with different thicknesses in a vacuum pumping loading state, and has the advantages of high bonding strength, high reliability, low cost and the like,
Drawings
The invention has 3 figures in total
FIG. 1 is a schematic view of a tensile strength test specimen in structural form;
FIG. 2 is a cross-sectional view of a tensile strength test specimen centering device;
FIG. 3 is a cross-sectional view of a retaining ring;
1-large sleeve, 2-small sleeve, 3-positioning ring, 4-adhesive layer, 5-bonded sample, 6-tensile stress test column
Detailed Description
The present invention is further illustrated by the following examples.
Referring to fig. 2, a tensile strength test specimen centering device comprises a large sleeve 1, a small sleeve 2 and a positioning ring 3.
Referring to FIG. 2, the diameter of the large circle of the test piece is 20 mm.
Referring to fig. 2, the large sleeve 1 is a cylindrical structure, the inside of the large sleeve is a stepped blind hole structure, the bottom end of the blind hole is an M5 threaded hole structure, the outer surface of the large sleeve is provided with four small round holes with the diameter of 1mm along the diameter direction of the sleeve, the diameter of the small hole part in the large sleeve is 20mm, the inner surface of the large sleeve is coated with a release agent, and the diameter of the large hole part is 30 mm.
Referring to fig. 2, the small sleeve 2 is of a cylindrical structure, the inside of the small sleeve is of a stepped blind hole structure, the bottom end of the blind hole is of an M5 threaded hole structure, the diameter of a small hole part in the small sleeve is 20mm, the diameter of a large hole part in the small sleeve is 25mm, the outer diameter of the small sleeve is 30mm, and a release agent is coated on the inner surface of the small sleeve.
Referring to fig. 3, the positioning ring 3 is a circular ring structure, the inner diameter is 20mm, the outer diameter is 24mm, the length is 12mm, 12 grooves with the width of 2mm and the depth of 0.5mm are formed in the inner part of the circular ring along the length direction of the circular ring, and a release agent is coated on the inner surface of the grooves.
When in use, a test sample is firstly bonded according to the sequence of the test column, the adhesive layer, the bonded material, the adhesive layer and the test column and is vertically placed; then, the large sleeve 1 of the centering device is sleeved on the test piece from top to bottom, the positioning ring 3 is arranged after the large sleeve is turned over, and the small sleeve 2 is sleeved on the test piece from top to bottom. When the test piece is taken out, if the test piece is adhered to the inner walls of the large sleeve and the small sleeve, the screw can be screwed into the threaded hole at the bottom end of the large sleeve and the small sleeve to eject the test piece.
Claims (1)
1. A tensile strength test sample centering device comprises a large sleeve (1), a small sleeve (2) and a positioning ring (3), wherein the large sleeve (1) is of a cylindrical structure, the interior of the large sleeve is of a stepped blind hole structure, the large sleeve (1) comprises a large inner diameter and a small inner diameter, the small sleeve (2) is also of a cylindrical shape,
the bottom end of a blind hole of the large sleeve (1) is of a threaded hole structure, the outer surface of the blind hole is provided with a plurality of small round holes for air overflow along the diameter direction of the sleeve, the inner surface of the blind hole is coated with a release agent, the large inner diameter of the large sleeve (1) is consistent with the outer diameter of the small sleeve (2), and the small inner diameter is consistent with the outer diameter of a bonding sample;
the small sleeve (2) is of an internal stepped blind hole structure, the bottom end of the blind hole is of a threaded hole structure, a release agent is coated on the inner surface of the blind hole structure, the small sleeve (2) comprises a large inner diameter and a small inner diameter, the large inner diameter is larger than the outer diameter of the positioning ring (3), and the small inner diameter is consistent with the outer diameter of a bonding sample;
the positioning ring (3) is of a circular ring structure, the inner diameter of the positioning ring is consistent with the outer diameter of the bonding test column, the length of the positioning ring is larger than the thickness of a bonded test sample, a groove for glue overflow is formed in the inner part of the circular ring along the length direction of the circular ring, and a release agent is coated on the inner surface of the circular ring;
the test sample is vertically placed, a large sleeve (1) of the centering device is sleeved on the test sample from top to bottom, the large sleeve is turned and then is arranged in a positioning ring (3), and a small sleeve (2) is sleeved on the test sample from top to bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710741877.XA CN107560906B (en) | 2017-08-25 | 2017-08-25 | Tensile strength test sample centering device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710741877.XA CN107560906B (en) | 2017-08-25 | 2017-08-25 | Tensile strength test sample centering device |
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| Publication Number | Publication Date |
|---|---|
| CN107560906A CN107560906A (en) | 2018-01-09 |
| CN107560906B true CN107560906B (en) | 2019-12-24 |
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| CN201710741877.XA Active CN107560906B (en) | 2017-08-25 | 2017-08-25 | Tensile strength test sample centering device |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201355343Y (en) * | 2008-12-24 | 2009-12-02 | 中国航空工业第一集团公司北京航空制造工程研究所 | Tensile specimen for testing bonding strength of coating |
| CN101718678A (en) * | 2009-12-03 | 2010-06-02 | 东华大学 | Method for directly and quantitatively testing thermal spraying bonding strength |
| CN203432827U (en) * | 2013-08-14 | 2014-02-12 | 亚士漆(上海)有限公司 | Mould for preparing test piece for testing performance of elastic coating |
| CN104007065A (en) * | 2014-06-07 | 2014-08-27 | 中国人民解放军装甲兵工程学院 | Testing device and method of bonding strength of thermal spraying coating on metal surface |
| CN204575416U (en) * | 2015-05-14 | 2015-08-19 | 淮阴工学院 | The sample preparation device of remolded expansive soils cutting ring sample |
| CN205262829U (en) * | 2015-12-30 | 2016-05-25 | 银邦金属复合材料股份有限公司 | Sample bonding mould |
-
2017
- 2017-08-25 CN CN201710741877.XA patent/CN107560906B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201355343Y (en) * | 2008-12-24 | 2009-12-02 | 中国航空工业第一集团公司北京航空制造工程研究所 | Tensile specimen for testing bonding strength of coating |
| CN101718678A (en) * | 2009-12-03 | 2010-06-02 | 东华大学 | Method for directly and quantitatively testing thermal spraying bonding strength |
| CN203432827U (en) * | 2013-08-14 | 2014-02-12 | 亚士漆(上海)有限公司 | Mould for preparing test piece for testing performance of elastic coating |
| CN104007065A (en) * | 2014-06-07 | 2014-08-27 | 中国人民解放军装甲兵工程学院 | Testing device and method of bonding strength of thermal spraying coating on metal surface |
| CN204575416U (en) * | 2015-05-14 | 2015-08-19 | 淮阴工学院 | The sample preparation device of remolded expansive soils cutting ring sample |
| CN205262829U (en) * | 2015-12-30 | 2016-05-25 | 银邦金属复合材料股份有限公司 | Sample bonding mould |
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| CN107560906A (en) | 2018-01-09 |
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