CN112461116A - Hydraulic bulging test equipment - Google Patents
Hydraulic bulging test equipment Download PDFInfo
- Publication number
- CN112461116A CN112461116A CN202011100246.8A CN202011100246A CN112461116A CN 112461116 A CN112461116 A CN 112461116A CN 202011100246 A CN202011100246 A CN 202011100246A CN 112461116 A CN112461116 A CN 112461116A
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- Prior art keywords
- curved surface
- hydraulic
- flexible
- liquid filling
- liquid
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/16—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring the deformation in a solid, e.g. by resistance strain gauge
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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
- G01N3/06—Special adaptations of indicating or recording means
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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
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
- G01N3/12—Pressure testing
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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
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0019—Compressive
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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
- G01N2203/003—Generation of the force
- G01N2203/0042—Pneumatic or hydraulic means
- G01N2203/0048—Hydraulic means
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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
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0676—Force, weight, load, energy, speed or acceleration
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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
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0682—Spatial dimension, e.g. length, area, angle
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a hydraulic bulge testing device, which comprises: the top of the base is provided with a liquid charging groove, and the bottom of the base is provided with a liquid charging port communicated with the liquid charging groove through a channel; the liquid filling tank is provided with a platform for mounting a sample to be tested, and the sample to be tested is covered on a notch of the liquid filling tank to form a liquid filling cavity; the flexible curved surface sensor is attached to the upper surface of the tested sample and used for sensing the curved surface shape of the tested sample after bulging deformation; the pressing ring is arranged around the flexible curved surface sensor and is matched with the platform to fix the tested piece and the flexible curved surface sensor; the upper cover is covered above the liquid filling groove and is abutted against the upper surface of the pressing ring, the upper cover is provided with a through hole communicated with the pressing ring, and the upper cover is provided with a threading hole; the controller is connected with the flexible curved surface sensor and used for receiving the signals collected by the flexible curved surface sensor to form a sample deformation curved surface diagram.
Description
Technical Field
The invention relates to the technical field of bulging experiment tests, in particular to a hydraulic bulging test device.
Background
The existing bulging experiment test equipment for the performance of the test piece is characterized by the displacement generated by bulging, but the displacement is generated only by small-area bulging of the test piece and is not the whole surface of the test piece, so that the performance of the test piece is represented by the displacement to be too large, and deviation is generated due to the action of friction force applied to the displacement in the transfer process. Therefore, how to provide a testing device capable of comprehensively representing the surface deformation of the test piece becomes a problem to be solved in the field.
Disclosure of Invention
The invention aims to provide a hydraulic bulging test device, which is used for comprehensively representing the surface deformation of a test piece and improving the measurement precision of the performance of the test piece.
To achieve the above object, the present invention provides a hydraulic bulge testing apparatus, comprising:
the top of the base is provided with a liquid charging groove, and the bottom of the base is provided with a liquid charging port communicated with the liquid charging groove through a channel; the liquid charging groove is provided with a platform for mounting a tested sample, and the tested sample is covered on a notch of the liquid charging groove to form a liquid charging cavity;
the flexible curved surface sensor is attached to the upper surface of the sample to be tested and used for sensing the curved surface shape of the sample to be tested after bulging deformation;
the pressing ring is arranged around the flexible curved surface sensor and is matched with the platform to fix the tested piece and the flexible curved surface sensor;
the upper cover is covered above the liquid filling groove and is abutted against the upper surface of the pressing ring, a through hole communicated with the pressing ring is formed in the upper cover, and a threading hole is formed in the upper cover;
and the controller is connected with the flexible curved surface sensor and is used for receiving the signals collected by the flexible curved surface sensor to form a sample deformation curved surface diagram.
Optionally, two liquid filling ports are arranged at the bottom of the base, the two liquid filling ports are communicated through a linear channel, and a bottom channel of the liquid filling tank is perpendicular to and communicated with the linear channel.
Optionally, the flexible curved surface sensor includes a flexible substrate layer, a plurality of electrode lines arranged in an array on the upper and lower surfaces of the flexible substrate layer, and the plurality of electrode lines on the upper surface are one-to-one symmetrical to the plurality of electrode lines on the lower surface; the edge of each electrode line is extended outwards to form a circuit, and each circuit is led out from one side of the flexible substrate layer; and the circuit of each electrode line passes through the threading hole and is connected to the controller.
Optionally, the flexible substrate layer is a polyelectrolyte flexible substrate layer.
Optionally, the inner edge of the upper cover is provided with an internal thread, and the top end of the base is provided with an external thread matched with the internal thread.
Optionally, the testing equipment further comprises a hydraulic liquid filling device, the hydraulic liquid filling device comprises a booster pump, a liquid storage tank, an air compressor, a pneumatic valve and a flow regulating valve, an input port of the booster pump is connected with the liquid storage tank, an output port of the booster pump is sequentially connected with the pneumatic valve and the flow regulating valve, the pneumatic valve is connected with the air compressor, and a hydraulic output port of the hydraulic liquid filling device is detachably connected with a liquid filling port of the base.
Optionally, a pressure sensor is further disposed on the pipeline of the hydraulic liquid filling device.
Optionally, a sealing ring is arranged between the sample to be tested and the base.
Optionally, the flexible curved surface sensor is in contact with part of the electrodeless line of the pressing ring.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects: the hydraulic bulging test equipment provided by the invention adopts the flexible curved surface sensor to comprehensively detect the shape of the tested piece after being inflated by the liquid, can comprehensively represent the deformation of the tested piece caused by pressing, and overcomes the problem that the displacement change at one point is only measured in the prior art.
In addition, the flexible curved surface sensor can also generate a curved surface simulation image of the bulging deformation of the tested piece, and a more comprehensive data basis is provided for subsequent scientific analysis through representation of the image.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a cross-sectional view of a hydraulic bulge testing apparatus provided by an embodiment of the invention;
FIG. 2 is a structural diagram of a flexible surface sensor in the hydraulic bulge testing apparatus according to an embodiment of the present invention;
fig. 3 is a perspective structural view of a base in the hydraulic bulge testing apparatus according to the embodiment of the present invention;
fig. 4 is a perspective structural view of a pressing ring in the hydraulic bulge testing apparatus according to the embodiment of the present invention;
fig. 5 is a perspective view of an upper cover of the hydraulic bulge testing apparatus according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
As shown in fig. 1, the present embodiment provides a hydraulic bulge testing apparatus including:
as shown in fig. 2, the base 1 has a liquid charging tank 11 at the top and a liquid charging port 13 at the bottom, which is communicated with the liquid charging tank 11 through a channel 12; the liquid charging tank 11 is provided with a platform for mounting a sample A to be tested, and the sample A to be tested is covered on a notch of the liquid charging tank 11 to form a liquid charging cavity.
In this embodiment, in order to facilitate hydraulic liquid charging, two liquid charging ports 13 may be disposed at the bottom of the base 1, and the two liquid charging ports 13 are communicated through a straight channel, and a bottom channel of the liquid charging tank 11 is perpendicular to and communicated with the straight channel. When one of the liquid charging ports 13 is selected to be connected, the other liquid charging port 13 is closed.
As an optional implementation manner, a sealing ring is arranged between the sample a to be tested and the base 1, so that liquid leakage can be reduced as much as possible in the process of hydraulic liquid filling. The accuracy of the test is improved.
The flexible curved surface sensor 2 is attached to the upper surface of the sample A to be tested and used for sensing the curved surface shape of the sample A to be tested after bulging deformation;
in this embodiment, as shown in fig. 3, the flexible curved surface sensor 2 includes a flexible substrate layer 21, a plurality of electrode lines 22 disposed on the upper and lower surfaces of the flexible substrate layer 21 in an array, and the plurality of electrode lines 22 on the upper surface and the plurality of electrode lines 22 on the lower surface are in one-to-one symmetry; the edge of each electrode line 22 extends outwards to form a circuit 23, and each circuit 23 is led out from one side of the flexible substrate layer 21; the electrical circuit 23 of each electrode line 22 is connected to the controller through the threading holes 42.
The flexible curved surface sensor 2 applies the same or different excitation voltages (1-10V) between the two electrode lines 22 forming each actuating functional element, so that each actuating functional element generates corresponding millimeter-scale deformation, the flexible curved surface sensor 2 is subjected to flexible curved surface deformation integrally, and potential difference is formed between the two electrode lines 22 of each sensing functional element; the external circuit control system realizes real-time measurement of the curved surface deformation of the tested piece A by detecting the potential difference, generates feedback to correct the excitation voltage until each actuating functional element generates expected deformation, and thus, the accurate representation of the curved surface deformation of the tested piece A is realized.
As an alternative embodiment, the flexible matrix layer 21 is a polyelectrolyte flexible matrix layer, which is an ion exchange membrane.
It should be noted that, because the contact part of the flexible curved surface sensor 2 and the clamping ring 3 does not deform, the sensing curved surface deformation is not needed, and no electrode line is arranged in the contact department, so that the clamping ring can more tightly press the flexible curved surface sensor 2 and the sample a to be tested.
A pressing ring 3, as shown in fig. 4, installed around the flexible curved sensor 2, and cooperating with the platform to fix the tested piece a and the flexible curved sensor 2;
the upper cover 4 is covered above the liquid charging groove 11 and is abutted against the upper surface of the pressing ring 3, as shown in fig. 5, the upper cover 4 is provided with a through hole 41 communicated with the pressing ring 3, and the upper cover 4 is provided with a threading hole 42;
in order to facilitate installation, the inner edge of the upper cover 4 is provided with an internal thread, and the top end of the base 1 is provided with an external thread matched with the internal thread. As shown in fig. 5, the upper end of the upper cap 4 has a nut shape, so that the pressing ring 3 can be more conveniently tightened.
And the controller is connected with the flexible curved surface sensor 2 and is used for receiving the signals collected by the flexible curved surface sensor 2 to form a sample deformation curved surface diagram.
The testing equipment in the embodiment can further comprise a hydraulic liquid filling device, the hydraulic liquid filling device comprises a booster pump, a liquid storage tank, an air compressor, a pneumatic valve and a flow regulating valve, an input port of the booster pump is connected with the liquid storage tank, an output port of the booster pump is sequentially connected with the pneumatic valve and the flow regulating valve, the pneumatic valve is connected with the air compressor, and a hydraulic output port of the hydraulic liquid filling device is detachably connected with a liquid filling port of the base. And a pressure sensor is also arranged on a pipeline of the hydraulic liquid filling device.
The principles and embodiments of the present invention have been described herein using specific examples, which are provided only to help understand the method and the core concept of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (9)
1. A hydraulic bulge testing device, characterized in that the testing device comprises:
the top of the base is provided with a liquid charging groove, and the bottom of the base is provided with a liquid charging port communicated with the liquid charging groove through a channel; the liquid charging groove is provided with a platform for mounting a tested sample, and the tested sample is covered on a notch of the liquid charging groove to form a liquid charging cavity;
the flexible curved surface sensor is attached to the upper surface of the sample to be tested and used for sensing the curved surface shape of the sample to be tested after bulging deformation;
the pressing ring is arranged around the flexible curved surface sensor and is matched with the platform to fix the tested piece and the flexible curved surface sensor;
the upper cover is covered above the liquid filling groove and is abutted against the upper surface of the pressing ring, a through hole communicated with the pressing ring is formed in the upper cover, and a threading hole is formed in the upper cover;
and the controller is connected with the flexible curved surface sensor and is used for receiving the signals collected by the flexible curved surface sensor to form a sample deformation curved surface diagram.
2. The hydraulic bulge testing apparatus of claim 1, wherein two liquid filling ports are disposed at the bottom of the base, and the two liquid filling ports are connected through a straight channel, and the bottom channel of the liquid filling tank is perpendicular to and connected with the straight channel.
3. The hydraulic bulge testing device of claim 1, wherein the flexible curved sensor comprises a flexible substrate layer, a plurality of electrode lines arranged in an array on the upper surface and the lower surface of the flexible substrate layer, and the plurality of electrode lines on the upper surface are symmetrical to the plurality of electrode lines on the lower surface; the edge of each electrode line is extended outwards to form a circuit, and each circuit is led out from one side of the flexible substrate layer; and the circuit of each electrode line passes through the threading hole and is connected to the controller.
4. The hydraulic bulge test apparatus of claim 3, wherein the flexible matrix layer is a polyelectrolyte flexible matrix layer.
5. The hydraulic bulge testing device of claim 1, wherein the inner edge of the upper cover is provided with an internal thread, and the top end of the base is provided with an external thread matched with the internal thread.
6. The hydraulic bulge testing equipment as claimed in claim 1, further comprising a hydraulic liquid filling device, wherein the hydraulic liquid filling device comprises a booster pump, a liquid storage tank, an air compressor, a pneumatic valve and a flow regulating valve, an input port of the booster pump is connected with the liquid storage tank, an output port of the booster pump is sequentially connected with the pneumatic valve and the flow regulating valve, the pneumatic valve is connected with the air compressor, and a hydraulic output port of the hydraulic liquid filling device is detachably connected with a liquid filling port of the base.
7. The hydraulic bulge testing apparatus of claim 6, wherein a pressure sensor is further disposed on the pipeline of the hydraulic liquid filling device.
8. The hydraulic bulge testing apparatus of claim 1, wherein a seal ring is disposed between the sample under test and the base.
9. The hydraulic bulge test apparatus of claim 2, wherein the flexible surface sensor is part of an electrodeless line in contact with the clamping ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011100246.8A CN112461116B (en) | 2020-10-15 | 2020-10-15 | Hydraulic bulging test equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011100246.8A CN112461116B (en) | 2020-10-15 | 2020-10-15 | Hydraulic bulging test equipment |
Publications (2)
| Publication Number | Publication Date |
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| CN112461116A true CN112461116A (en) | 2021-03-09 |
| CN112461116B CN112461116B (en) | 2021-07-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011100246.8A Active CN112461116B (en) | 2020-10-15 | 2020-10-15 | Hydraulic bulging test equipment |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08285749A (en) * | 1995-04-12 | 1996-11-01 | Sekisui Chem Co Ltd | External hydraulic test equipment for flexible synthetic resin tube |
| CN102183415A (en) * | 2011-03-23 | 2011-09-14 | 中国特种设备检测研究院 | Small sample hydraulic burst test method and device for material property test |
| CN103411710A (en) * | 2013-08-12 | 2013-11-27 | 国家纳米科学中心 | Pressure sensor, electronic skin and touch screen equipment |
| CN103558087A (en) * | 2013-10-18 | 2014-02-05 | 常州大学 | Tube wall plane indentation residual thickness bulging device and method for tube mechanical property test |
| CN103954394A (en) * | 2014-03-10 | 2014-07-30 | 西安交通大学 | Flexible pressure sensor based on dielectric high-elastic polymer, and method for sensing pressure |
| CN104344998A (en) * | 2014-11-04 | 2015-02-11 | 中国特种设备检测研究院 | Test specimen hydraulic bulging test method and device |
| CN112284921A (en) * | 2020-10-22 | 2021-01-29 | 苏州热工研究院有限公司 | Method for determining uniaxial stress-strain relation of material based on high-temperature hydraulic bulge test sample |
-
2020
- 2020-10-15 CN CN202011100246.8A patent/CN112461116B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08285749A (en) * | 1995-04-12 | 1996-11-01 | Sekisui Chem Co Ltd | External hydraulic test equipment for flexible synthetic resin tube |
| CN102183415A (en) * | 2011-03-23 | 2011-09-14 | 中国特种设备检测研究院 | Small sample hydraulic burst test method and device for material property test |
| CN103411710A (en) * | 2013-08-12 | 2013-11-27 | 国家纳米科学中心 | Pressure sensor, electronic skin and touch screen equipment |
| CN103558087A (en) * | 2013-10-18 | 2014-02-05 | 常州大学 | Tube wall plane indentation residual thickness bulging device and method for tube mechanical property test |
| CN103954394A (en) * | 2014-03-10 | 2014-07-30 | 西安交通大学 | Flexible pressure sensor based on dielectric high-elastic polymer, and method for sensing pressure |
| CN104344998A (en) * | 2014-11-04 | 2015-02-11 | 中国特种设备检测研究院 | Test specimen hydraulic bulging test method and device |
| CN112284921A (en) * | 2020-10-22 | 2021-01-29 | 苏州热工研究院有限公司 | Method for determining uniaxial stress-strain relation of material based on high-temperature hydraulic bulge test sample |
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| CN112461116B (en) | 2021-07-20 |
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