CN211652407U - Portable indentation method mechanical properties is at active service tester - Google Patents
Portable indentation method mechanical properties is at active service tester Download PDFInfo
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- CN211652407U CN211652407U CN201921722682.1U CN201921722682U CN211652407U CN 211652407 U CN211652407 U CN 211652407U CN 201921722682 U CN201921722682 U CN 201921722682U CN 211652407 U CN211652407 U CN 211652407U
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- 238000007373 indentation Methods 0.000 title claims abstract description 39
- 238000000034 method Methods 0.000 title claims abstract description 26
- 239000000463 material Substances 0.000 claims abstract description 35
- 238000006073 displacement reaction Methods 0.000 claims abstract description 34
- 238000001514 detection method Methods 0.000 claims description 11
- 230000005291 magnetic effect Effects 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 4
- 238000012360 testing method Methods 0.000 abstract description 13
- 239000007769 metal material Substances 0.000 description 6
- 238000009659 non-destructive testing Methods 0.000 description 4
- 230000005294 ferromagnetic effect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000009863 impact test Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
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Abstract
The utility model discloses a portable indentation method mechanical properties is at labour tester belongs to mechanical properties test instrument. The portable indentation method mechanical property in-service tester comprises a support, a driving mechanism, a load assembly and a displacement sensor; the load assembly comprises a load sensor and a pressure head which are rigidly connected with each other; the driving mechanism is arranged on the bracket; one end of the displacement sensor is arranged on the bracket, and the other end of the displacement sensor is connected with the pressure head; the lower part of the bracket is provided with a mounting seat which is used for fixing the tester on the structure to be tested; the driving mechanism is used for driving the load assembly to move towards the direction close to the mounting seat, and the lower part of the bracket is provided with an open space so that when the load assembly moves towards the direction close to the mounting seat, the pressure head can abut against the surface of the structure or the material to be measured to pressurize; the displacement sensor is used for detecting the press-in depth of the pressure head. The utility model discloses a tester can carry out the test in labour to the mechanical properties of structure or material.
Description
Technical Field
The utility model relates to a mechanical properties test instrument especially relates to a portable indentation method mechanical properties is at labour tester.
Background
The metal material has good mechanical properties, so the metal material is widely applied to the industrial fields of chemical industry, machinery, energy, aerospace and the like. The mechanical properties of the metal material are gradually reduced along with the change of service time, and in order to understand and detect the change of the mechanical properties of the metal material, the most common methods are mechanical tests such as tensile test, impact test and the like, but the tests are destructive and cannot be used for in-service and nondestructive detection of the material or the structure.
At present, the indentation method mechanical tester adopts a micro indentation detection method, and because the indentation generated in the detection process is tiny, the indentation method mechanical tester can be regarded as an approximately nondestructive testing instrument and method, and because the operation is simple and convenient, the mechanical property parameters of the tested material can be directly obtained, so that the indentation method mechanical tester is widely concerned.
The existing tester for detecting the mechanical property of a material or a component by adopting an indentation technology has certain defects:
(1) the mechanical property data of the material can be obtained only by manually observing the appearance of the indentation, and the measurement result is influenced by manual observation;
(2) the structure or material to be tested is required to be placed on a test bedplate of a tester, is only suitable for testing small-sized structural parts, is suitable for detection and analysis in a laboratory, and is not suitable for field in-service nondestructive testing of large-sized structures on site;
(3) the structure of the in-service material can be damaged in the detection process, and the reliability of the in-service material in continuous use is reduced.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of the prior art, the utility model aims to provide a portable indentation method mechanical property in-service tester which can provide field use, is convenient for carrying out in-service and nondestructive testing on materials or structures.
The purpose of the utility model is realized by adopting the following technical scheme:
a portable indentation method mechanical property in-service tester comprises a bracket, a driving mechanism, a load assembly and a displacement sensor;
the load assembly comprises a load sensor and a pressure head which are rigidly connected with each other; the driving mechanism is arranged on the bracket; one end of the displacement sensor is mounted on the support, and the other end of the displacement sensor is connected with the pressure head;
the lower part of the bracket is provided with a mounting seat which is used for fixedly placing the tester on a structure to be tested; the driving mechanism is used for driving the load assembly to move towards the direction close to the mounting seat, and the lower part of the bracket is provided with an open space, so that when the load assembly moves towards the direction close to the mounting seat, the pressure head can abut against the surface of a structure or material to be measured to pressurize; the displacement sensor is used for detecting the press-in depth of the pressure head.
Further, the mounting seat is a magnetic suction seat, and the magnetic suction seat is used for fixing the tester on the surface of the metal structure or material to be tested.
Furthermore, the lower part of the mounting seat is provided with a groove surface, and the groove surface is used for fixing the tester during pipeline detection.
Further, the pressure head is a spherical pressure head.
Further, the driving mechanism comprises a motor and a loading screw rod, and the motor, the loading screw rod, the load sensor and the pressure head are sequentially and coaxially connected.
Further, the motor is a stepping motor.
Further, the device also comprises a connecting piece; the displacement sensor is arranged eccentrically relative to the pressure head, and the pressure head is connected with one end, far away from the support, of the displacement sensor through the connecting piece.
Furthermore, the support comprises two upright posts, and also comprises an upper connecting plate, a middle connecting plate and a lower connecting plate which are sequentially and fixedly arranged between the upright posts; the upper end of the loading screw rod is connected with a motor shaft of the motor, and the motor is fixedly arranged on the upper connecting plate; the middle connecting plate is used for mounting the lower end of the loading screw rod; the lower connecting plate is provided with a through hole, and the through hole is used for providing the open space for the pressure head to penetrate so as to abut against the surface of the structure or the material to be tested.
Further, the device also comprises a control system, and the motor, the load sensor and the displacement sensor are electrically connected with the control system.
Compared with the prior art, the beneficial effects of the utility model reside in that:
the mechanical property detection can be carried out on the in-service structure or material in the production and operation environment, and the detection is approximately nondestructive detection due to tiny indentation, so that the sampling test is not required to be carried out on the operating structure or component.
Drawings
Fig. 1 is one of the structural schematic diagrams of the portable indentation method mechanical performance in-service tester of the present invention;
fig. 2 is a second schematic structural view of the portable indentation method mechanical performance in-service tester of the present invention;
in the figure: 10. a support; 11. a mounting seat; 12. a column; 13. an upper connecting plate; 14. an intermediate connection plate; 15. a lower connecting plate; 151. perforating; 21. a motor; 22. loading a screw rod; 31. a load sensor; 32. a pressure head; 40. a displacement sensor; 50. a connecting member; 90. and (5) the pipeline to be detected.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that the embodiments or technical features described below can be arbitrarily combined to form a new embodiment without conflict.
It should be noted that, in this embodiment, the term "lower portion" refers to a lower portion of the tester on a side of the tester near the structure to be tested when the tester is in a use state and the tester is in a vertical placement state.
As shown in fig. 1 and 2, the present embodiment provides a portable indentation method mechanical performance in-service tester, which includes a support 10, a driving mechanism, a load assembly and a displacement sensor 40; the load assembly comprises a load sensor 31 and a pressure head 32 which are rigidly connected with each other; the driving mechanism is arranged on the bracket 10 and is provided with a driving end which is used for driving the load assembly to move; one end of the displacement sensor 40 is mounted on the bracket 10, and the other end is connected with the pressure head 32, so that the displacement of the pressure head 32 is detected through the displacement sensor 40; the lower part of the bracket 10 is provided with a mounting seat 11, and the mounting seat 11 is used for fixedly placing the tester on a structure to be tested; the driving mechanism is used for driving the load assembly to move towards the direction approaching the mounting seat 11, and the lower part of the bracket 10 is configured to have an open space, so that when the load assembly moves towards the direction approaching the mounting seat 11, the pressure head 32 can abut against the surface of the structure to be measured, so that the surface of the structure or the material to be measured is pressurized through the pressure head 32 under the driving of the driving mechanism; the displacement sensor 40 is used for detecting the depth of the indenter 32, that is, for detecting the depth of the indentation at the indentation caused by the pressing of the indenter 32. Wherein the lower portion of the bracket 10 is configured to have an open space, which may be realized by forming a hole in a connecting plate of the lower portion of the bracket 10, and may be realized by other methods in other embodiments.
The working process of the tester of the embodiment is as follows:
locally cleaning and polishing the surface of a material or a component to be tested, placing a tester on the surface of the material or the component to be tested through a mounting seat 11 at the lower part of the tester, so that the tester is well fixed, and a pressure head 32 is aligned to a polished area to be tested; the driving mechanism is started, the driving mechanism works to drive the load assembly to move towards the direction close to the area to be tested, the area to be tested is pressurized through the pressure head 32, load data in the pressurizing process are measured through the load sensor 31, indentation depth data are measured through the displacement sensor 40, the load data and the indentation depth data can be recorded through the tester, based on the data, data processing is convenient to perform in the later stage, a load-indentation depth curve can be obtained, and then mechanical property parameters of the material can be obtained through calculation, wherein the mechanical property parameters include but are not limited to yield strength, elastic modulus, tensile strength and stress-strain curve. It should be noted that how to calculate the mechanical property parameters of the material according to the data obtained by the tester during the testing process can be realized by adopting conventional technical means in the field, which is not described herein again.
The tester of the embodiment has an open lower part, can be adsorbed or fixed on the surface of a structure or material to be tested during work, and can be used for loading and unloading the pressure head 32 on the surface of the structure or material to be tested after moving by configuring the lower part into an open space, so that the load data and the indentation data can be measured, and further the mechanical property parameters of the material can be obtained through calculation.
Preferably, the present embodiment further comprises a control system, and the driving mechanism, the load sensor 31 and the displacement sensor 40 are all electrically connected with the control system. In this embodiment, the control system is a control computer, and the operating parameters of the driving mechanism are adjusted on the control computer according to the property of the material to be measured, so as to adjust the loading rate of the load assembly, the peak load per cycle, and the like. Starting an instrument to perform loading and unloading circulation on the surface of the material, simultaneously measuring data of load and indentation depth by the load sensor 31 and the displacement sensor 40 respectively, and storing the data into a control computer; and after the tester finishes the set loading and unloading cycle, observing a load-indentation depth curve of the loading and unloading cycle, processing data, and calculating the mechanical property parameters of the material and the tensile stress strain curve of the material. It should be noted that the control or communication between the control system and the driving mechanism, the load sensor 31 and the displacement sensor 40 can be set by those skilled in the art according to the conventional technical means according to the actual needs.
Preferably, in order to stably fix the tester on the surface of the ferromagnetic metal material or other ferromagnetic metal solid structure or material to be tested and ensure reliable data obtained by the tester during measurement, the mounting seat 11 is a magnetic attraction seat, and the magnetic attraction seat is used for fixing the tester on the surface of the metal structure or material to be tested.
Preferably, in order to conveniently and stably fix the tester on the non-ferromagnetic metal material, the tester can be fixed by the self weight of the tester or by adding an auxiliary device, and in order to conveniently and fixedly fix the tester during pipeline detection, the lower part of the mounting seat 11 is a groove surface; in this embodiment, the groove surface is an arc-shaped groove surface, as shown in fig. 1 and 2, the arc-shaped groove surface is fixed on the surface of the tested pipeline 90 in a clamping manner, so that the tester is fixed on the surface of the structure to be tested by the dead weight of the tester. In other embodiments, the groove surface can be in different shapes.
In other embodiments, the lower portion of the mounting base 11 may also be a plane to facilitate the smooth placement of the tester on the plane of the structure to be tested.
Preferably, to be suitable for in-service testing and reduce the negative impact of testing on in-service structures or materials, the indenter 32 of the present embodiment is configured as a spherical indenter 32, and when the spherical indenter 32 is used for preparing an indentation, a sharp crack source can be prevented from being left on the surface of the structure or the part, so that the tester is suitable for testing important structural materials, and is suitable for near-nondestructive testing.
Preferably, the driving mechanism comprises a motor 21 and a loading screw rod 22, the motor 21, the loading screw rod 22, the load sensor 31 and the pressure head 32 are sequentially and coaxially installed and connected, and the pressure head 32 can realize loading, holding or unloading actions under the driving of the stepping motor 21; how the loading screw rod 22 is connected with the motor 21 can realize the conversion of rotary motion into linear motion is the conventional technology in the field; and those skilled in the art can select a suitable load sensor 31 according to actual requirements, which may be a resistance strain type, a piezoelectric type, or a piezoresistive type load sensor 31, and those skilled in the art can mount the load sensor 31, the loading screw 22, and the ram 32 according to different types of the load sensor 31.
Preferably, the motor 21 is a stepper motor 21.
Preferably, the tester further comprises a connector 50; the displacement sensor 40 is eccentrically arranged relative to the pressure head 32, the pressure head 32 is connected with one end, far away from the support 10, of the displacement sensor 40 through the connecting piece 50, the displacement sensor 40 of the embodiment measures the displacement of the pressure head 32, and therefore the purpose of measuring the indentation depth is achieved, in the embodiment, the displacement sensor 40 is eccentrically arranged relative to the pressure head 32, the fact that the tiny axial deformation of a mounting shaft of the pressure head 32 cannot affect the indentation depth measured by the displacement sensor 40 when the mounting shaft is loaded can be guaranteed, and accurate indentation depth data can be acquired.
Preferably, the support 10 includes at least two columns 12, and further includes an upper connecting plate 13, a middle connecting plate 14 and a lower connecting plate 15 which are sequentially and fixedly arranged between the columns 12; the upper end of the loading screw rod 22 is connected with a motor 21 shaft of the motor 21, and the motor 21 is fixedly arranged on the upper connecting plate 13; the middle connecting plate 14 is used for mounting the lower end of a loading screw rod 22; the lower connecting plate 15 is used for fixing the mounting seat 11; the lower connecting plate 15 is provided with a through hole 151, and the through hole 151 is used for providing an open space for the pressure head 32 to pass through so as to abut against the surface of the structure or material to be tested; the ram 32 does not contact the inner wall of the bore 151. In this embodiment, the arrangement of the upright columns 12, the upper connecting plates 13, the middle connecting plates 14 and the lower connecting plates 15 is beneficial to maintaining the stability of the support 10; and through set up perforation 151 at lower connecting plate 15, be favorable to the tester to carry out the mechanical properties of material test of structure in service.
In other embodiments, the lower portion of the bracket 10 has an open space, and the following structure can be used:
the support 10 comprises at least two upright posts 12, an upper connecting plate 13 and a middle connecting plate 14 which are fixedly arranged between the upright posts 12 in sequence, the upper end of a loading screw rod 22 is connected with a motor 21 shaft of a motor 21, and the motor 21 is fixedly arranged on the upper connecting plate 13; the middle connecting plate 14 is used for mounting the lower end of a loading screw rod 22; the mounting seats 11 are directly mounted on the two upright posts 12; the opening of the lower portion of the bracket 10 can also be achieved by not providing the lower connection plate 15.
The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention cannot be limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are all within the protection scope of the present invention.
Claims (9)
1. A portable indentation method mechanical properties is at active service tester which characterized in that:
the device comprises a bracket, a driving mechanism, a load assembly and a displacement sensor;
the load assembly comprises a load sensor and a pressure head which are rigidly connected with each other; the driving mechanism is arranged on the bracket; one end of the displacement sensor is mounted on the support, and the other end of the displacement sensor is connected with the pressure head;
the lower part of the bracket is provided with a mounting seat which is used for fixing the tester on a structure to be tested; the driving mechanism is used for driving the load assembly to move towards the direction close to the mounting seat, and the lower part of the bracket is provided with an open space, so that when the load assembly moves towards the direction close to the mounting seat, the pressure head can abut against the surface of a structure or material to be measured to pressurize; the displacement sensor is used for detecting the press-in depth of the pressure head.
2. The portable indentation mechanical property in-service tester as claimed in claim 1, characterized in that:
the mounting seat is a magnetic suction seat, and the magnetic suction seat is used for fixing the tester on the surface of the metal structure or material to be tested.
3. The portable indentation mechanical property in-service tester as claimed in claim 1, characterized in that:
the lower part of the mounting seat is provided with a groove surface, and the groove surface is used for fixing the tester during pipeline detection.
4. The portable indentation mechanical property in-service tester as claimed in claim 1, characterized in that:
the pressure head is a spherical pressure head.
5. The portable indentation mechanical property in-service tester as claimed in claim 1, characterized in that:
the driving mechanism comprises a motor and a loading screw rod, and the motor, the loading screw rod, the load sensor and the pressure head are sequentially and coaxially connected.
6. The portable indentation method mechanical property in-service tester as claimed in claim 5, characterized in that:
the motor is a stepping motor.
7. The portable indentation method mechanical property in-service tester as claimed in claim 5, characterized in that:
the device also comprises a connecting piece; the displacement sensor is arranged eccentrically relative to the pressure head, and the pressure head is connected with one end, far away from the support, of the displacement sensor through the connecting piece.
8. The portable indentation method mechanical property in-service tester as claimed in claim 5, characterized in that:
the support comprises two upright posts, an upper connecting plate, a middle connecting plate and a lower connecting plate which are fixedly arranged between the upright posts in sequence; the upper end of the loading screw rod is connected with a motor shaft of the motor, and the motor is fixedly arranged on the upper connecting plate; the middle connecting plate is used for mounting the lower end of the loading screw rod; the lower connecting plate is provided with a through hole, and the through hole is used for providing the open space for the pressure head to penetrate so as to abut against the surface of the structure or the material to be tested.
9. The portable indentation method mechanical property in-service tester as claimed in claim 5, characterized in that:
the motor, the load sensor and the displacement sensor are electrically connected with the control system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921722682.1U CN211652407U (en) | 2019-10-14 | 2019-10-14 | Portable indentation method mechanical properties is at active service tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921722682.1U CN211652407U (en) | 2019-10-14 | 2019-10-14 | Portable indentation method mechanical properties is at active service tester |
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| Publication Number | Publication Date |
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| CN211652407U true CN211652407U (en) | 2020-10-09 |
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| CN201921722682.1U Expired - Fee Related CN211652407U (en) | 2019-10-14 | 2019-10-14 | Portable indentation method mechanical properties is at active service tester |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112485141A (en) * | 2020-11-13 | 2021-03-12 | 钱徐耀 | Test head assembly in surface hardness testing device of metal workpiece |
| CN112665974A (en) * | 2021-02-08 | 2021-04-16 | 上海中研仪器制造有限公司 | Portable mechanical property testing machine |
| CN112857989A (en) * | 2021-02-03 | 2021-05-28 | 吉林大学 | Pipe in-situ mechanical property testing device under service working condition |
| CN113074852A (en) * | 2021-03-16 | 2021-07-06 | 蒋文春 | Portable residual stress testing device |
| CN114264542A (en) * | 2021-11-17 | 2022-04-01 | 国高材高分子材料产业创新中心有限公司 | Perforation performance measuring method, device and medium based on digital image correlation method |
| CN114562633A (en) * | 2022-01-12 | 2022-05-31 | 广东大鹏液化天然气有限公司 | Online repair method and device for shearing resistance of composite material of pressure pipeline |
| CN114838693A (en) * | 2022-03-15 | 2022-08-02 | 中国船舶重工集团公司第七二五研究所 | Connecting device for measuring indentation depth by using displacement meter and using method |
-
2019
- 2019-10-14 CN CN201921722682.1U patent/CN211652407U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112485141A (en) * | 2020-11-13 | 2021-03-12 | 钱徐耀 | Test head assembly in surface hardness testing device of metal workpiece |
| CN112857989A (en) * | 2021-02-03 | 2021-05-28 | 吉林大学 | Pipe in-situ mechanical property testing device under service working condition |
| CN112665974A (en) * | 2021-02-08 | 2021-04-16 | 上海中研仪器制造有限公司 | Portable mechanical property testing machine |
| CN113074852A (en) * | 2021-03-16 | 2021-07-06 | 蒋文春 | Portable residual stress testing device |
| CN114264542A (en) * | 2021-11-17 | 2022-04-01 | 国高材高分子材料产业创新中心有限公司 | Perforation performance measuring method, device and medium based on digital image correlation method |
| CN114264542B (en) * | 2021-11-17 | 2024-04-12 | 国高材高分子材料产业创新中心有限公司 | Perforation performance measuring method, equipment and medium based on digital image correlation method |
| CN114562633A (en) * | 2022-01-12 | 2022-05-31 | 广东大鹏液化天然气有限公司 | Online repair method and device for shearing resistance of composite material of pressure pipeline |
| CN114838693A (en) * | 2022-03-15 | 2022-08-02 | 中国船舶重工集团公司第七二五研究所 | Connecting device for measuring indentation depth by using displacement meter and using method |
| CN114838693B (en) * | 2022-03-15 | 2023-09-29 | 中国船舶重工集团公司第七二五研究所 | Connecting device for measuring indentation depth by using displacement meter and using method |
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