CN111238937A - Metal wire fatigue test device - Google Patents
Metal wire fatigue test device Download PDFInfo
- Publication number
- CN111238937A CN111238937A CN202010125048.0A CN202010125048A CN111238937A CN 111238937 A CN111238937 A CN 111238937A CN 202010125048 A CN202010125048 A CN 202010125048A CN 111238937 A CN111238937 A CN 111238937A
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- China
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- testing device
- displacement sensor
- fatigue testing
- hole
- support plate
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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
- 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
- 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
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0075—Strain-stress relations or elastic constants
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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
- G01N2203/0202—Control of the test
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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
- G01N2203/028—One dimensional, e.g. filaments, wires, ropes or cables
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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
Abstract
The invention discloses a metal wire fatigue testing device, which comprises: the optical axis fixing base is vertically fixed on the base through the optical axis fixing base, and the upper support plate is arranged at the top of the optical axis of the support. And a displacement sensor fixing seat is arranged in the middle of the optical axis, and a displacement sensor is arranged on the displacement sensor fixing seat. A middle support plate is arranged above the displacement sensor, and a horizontal sliding table is arranged below the middle support plate. One end of the alloy wire to be detected is connected with the copper column fixing column on the upper supporting plate and vertically penetrates through the through hole in the center of the middle supporting plate and the through hole of the horizontal sliding table, the other end of the alloy wire to be detected is fixed on a guide column, and the alloy wire to be detected is respectively connected with a power supply. The testing device provided by the invention can realize different stress strain waveforms and realize multi-mode control by changing the current waveform to generate different heat waveforms, thereby being capable of adapting to fatigue tests under different working conditions.
Description
Technical Field
The invention relates to the technical field of testing equipment, in particular to a metal wire fatigue testing device.
Background
The shape memory alloy is a special functional material, has excellent superelasticity, memory and damping properties, and also has excellent fatigue, biocompatibility and corrosion resistance, and good comprehensive mechanical properties, so that the shape memory alloy is widely used in the industries of aerospace, ships, medical treatment, petrochemical industry and the like. The superfine memory alloy wire can generate larger deformation in the phase change process, and has the advantages of simple control and high response speed. Can be used in various digital products, and has wide application prospect and market value. Because of the characteristics of high reliability, high use frequency and long service life of digital products, the fatigue life test of the superfine memory alloy wires is required.
The fatigue life of a metal wire is generally tested by testing the fatigue life of the wire in axial reciprocating stretching on a stretching machine. The traditional method is to apply mechanical external force on the metal wire to carry out the tensile fatigue test. For example, in patent ZL201410843122.7, a linear reciprocating motor is controlled by a motor controller to reciprocate, so as to automatically complete ten thousand times of bending fatigue tests of metal wires until the metal wires break. When the metal wire is broken in the fatigue test, the motor controller can automatically record the times and time of the repeated movement and can accurately control the distance of the reciprocating movement. In the actual use process, the fatigue test of the memory alloy wire needs to adapt to different working conditions and adopt different modes to carry out the test due to the complex working conditions and different mechanical loading conditions. The fatigue testing apparatus of the prior art hardly meets the above requirements. In addition, the ultra-fine wire can also generate phenomena of distortion, shaking and the like in the test process to influence the test precision, the difficulty can be overcome through the limiting mechanism, and interference factors such as large friction force and the like can be brought.
Based on the problems, the invention comprehensively improves the fatigue testing device, provides the fatigue testing device with no shaking, no torsion, small friction force and long service life, can realize different stress strain waveforms and realize multi-mode control by controlling the current waveform, and thus can adapt to fatigue tests under different working conditions.
Disclosure of Invention
The invention aims to provide an ultra-fine metal wire fatigue testing device with no shaking, no torsion, small friction force and long service life, which specifically comprises the following components:
base, a plurality of support optical axes, go up the extension board, wherein a plurality of support optical axes are vertical to be fixed on the base, go up the fixed top that sets up at a plurality of support optical axes of extension board, specifically do:
a displacement sensor fixing seat is arranged at the central position of the optical axes of a plurality of brackets on the base, a displacement sensor is arranged on the displacement sensor fixing seat, an intermediate support plate is arranged above the displacement sensor, a through hole is formed in the center of the intermediate support plate, an adjustable bracket is arranged at the corresponding position on the upper support plate vertically above the through hole, a tension sensor and a copper column fixing column are arranged on the adjustable bracket, and the copper column fixing column is used for fixing one end of a metal wire to be measured and is electrically connected with one end of a power supply box; the metal wire to be tested passes through the through hole to naturally droop, and the other end of the metal wire to be tested is fixed on the guide post and is electrically connected with the other end of the power box.
A horizontal sliding table is arranged below the middle support plate, a through hole corresponding to the through hole is formed in the horizontal sliding table, and the guide column vertically penetrates through the through hole of the horizontal sliding table.
Further, the height of the middle support plate can be adjusted in the vertical direction along the optical axes of the plurality of supports.
Furthermore, the optical axes of the plurality of brackets are connected with the base through the optical axis fixing seats positioned on the base.
Furthermore, the number of the optical axes of the plurality of supports is 3, and the supports are distributed on the base in an equilateral triangle or isosceles triangle shape.
Furthermore, the guide post and the guide rail contact type or magnetic post suspension type move in the through hole.
Furthermore, a load frame with adjustable mass is connected below the guide post.
Further, the displacement sensor is height-adjustable on the displacement sensor fixing seat.
Further, a level is arranged on the middle support plate.
Further, a tension sensor protective cover is arranged outside the tension sensor.
Furthermore, a power supply and a lower computer are arranged in the power supply box, a control module is installed in the lower computer, the lower computer is connected with an upper computer, and the upper computer communicates with the lower computer through a communication line and sends instructions.
Further, the power supply box is fixed above the upper support plate or is arranged separately from the upper support plate.
According to the invention, different stress-strain waveforms can be realized by controlling the current waveform, and multi-mode control is realized, so that the fatigue test under different working conditions can be adapted.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent by describing embodiments thereof with reference to the accompanying drawings in which:
FIG. 1 shows a structural view of a fatigue testing apparatus of the present invention;
FIG. 2 shows a schematic representation of the fatigue testing apparatus of the present invention;
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings and examples.
As shown in fig. 1, the metal wire fatigue testing device provided by the invention comprises a base (1), a plurality of support optical axes (2) and an upper supporting plate (3), wherein the base (1) can be made of cast iron, the plurality of support optical axes (2) are vertically fixed on the base (1) through a plurality of corresponding optical axis fixing seats (4), and the upper supporting plate (3) is fixedly arranged at the top of the support optical axes (2). In this embodiment, the number of the plurality of support optical axes (3) is 3, and the plurality of support optical axes are distributed on the base in an equilateral triangle or isosceles triangle. In other embodiments, the number of the bracket optical axes (3) can be 2 or 4, so as to achieve stable support of the upper support plate.
A displacement sensor fixing seat (5) is arranged at the central position of the optical axes of the plurality of brackets on the base (1), and a displacement sensor (6) is arranged on the displacement sensor fixing seat, wherein the height of the displacement sensor (6) on the displacement sensor fixing seat (5) is adjustable. The displacement sensor fixing seat (5) is in an L-shaped plate shape, the horizontal plane of the displacement sensor fixing seat is fixed on the base (1), the vertical surface of the displacement sensor fixing seat is provided with the displacement sensor (6), and the height of the displacement sensor (6) can be adjusted on the vertical surface. An intermediate support plate (7) is arranged above the displacement sensor (6), and the intermediate support plate (7) can be fixed on the support optical axis (2) at a certain height and can also be adjusted in height along the plurality of support optical axes (2) in the vertical direction. In this embodiment, middle extension board (7) are triangle-shaped, have three through-hole at the triangle-shaped end for three support optical axis (2) are passed from it, thereby middle extension board (7) can slide on vertical direction along support optical axis (2), and support optical axis (2) and the below of middle extension board cup joint the position are provided with corresponding buckle simultaneously, when middle extension board (7) are adjusted suitable position, through pinning the buckle, thereby are fixed with the height of middle extension board (7). The middle support plate (7) is provided with a through hole (8) in the center. In another embodiment, a level (15) is arranged on the middle support plate (7) to ensure that the surface of the middle support plate (7) is horizontal.
A horizontal sliding table (9) is further arranged below the middle support plate (7), and a through hole corresponding to the through hole (8) is formed in the horizontal sliding table (9); the horizontal table is provided with a sliding channel made of polytetrafluoroethylene materials, and the horizontal sliding table (9) can move horizontally along the sliding channel by adjusting a knob of the horizontal sliding table, so that the vertical direction of the guide post (13) can be accurately adjusted.
A bracket (10) is arranged at a corresponding position on the upper support plate (3) vertically above the through hole (8), a tension sensor (11) and a copper column fixing column (12) are arranged on the bracket (10), and the height of the bracket (10) can be adjusted in the vertical direction. In another embodiment, a tension sensor protective cover is arranged outside the tension sensor (11) to protect the tension sensor. In another embodiment, a lamp source is further arranged in the center of the bottom surface of the upper support plate (3), so that visual convenience can be provided for the installation and the test of the superfine wire.
The copper column fixing column (12) is used for fixing one end of a metal wire to be tested and is electrically connected with one end of a power supply box (16). In another embodiment, a first socket can be provided on the upper plate
(not shown), one end of the copper column fixing column (12) is electrically connected with the first socket, and then the first socket is connected with one end of the power box, so that the power box can be conveniently plugged to control the electrifying of the metal wire to be tested. The metal wire to be tested naturally droops after passing through the through hole (8) and the through hole of the horizontal sliding table (9), and the other end of the metal wire to be tested is fixed on the guide column (13) and is electrically connected with the other end of the power supply box (16). The guide column (13) is overlapped with the horizontal sliding table to a certain extent in the horizontal direction, so that the horizontal sliding table can contact the guide column (13) when moving in the horizontal direction, and the offset position of the guide column (13) is adjusted.
Similarly, a second socket (not shown) may be provided on the center strip (7), with the guide post (13) being electrically connected to the second socket, which is then electrically connected to the other end of the power pack. A load frame (14) with adjustable mass is connected below the guide column (13), and the load is adjusted by adding or adding few weights on the load frame. In the embodiment, the guide column (13) moves in the through hole in a way of contact with the guide rail. In another embodiment, the guiding column (13) can move in the through hole in a magnetic column suspension mode.
The power supply box is internally provided with a power supply and a lower computer, the lower computer is internally provided with a control module and is connected with an upper computer (17), and the upper computer (17) is communicated with the lower computer through a communication line and sends an instruction. The power supply box can be fixed above the upper support plate (3) or arranged separately from the upper support plate (3), and in the embodiment, the power supply box is arranged separately from the upper support plate, as shown in fig. 2.
When the metal wire fatigue test is carried out, the metal wire is respectively fixed on the copper column fixing column (12) and the guide column (13) on the upper portion and is respectively connected with two ends of a power supply, so that a current forms a conduction loop through the metal wire to be tested. In the embodiment, the metal wire to be tested is an ultrafine memory alloy wire, the ultrafine memory alloy wire to be tested is installed on an upper copper column fixing column and a lower guide column, then a power supply, an upper computer and a lower computer are turned on to set basic parameters and perform initialization correction, then required working waveforms and parameters are selected, different heat waveforms are generated by changing current waveforms, and the use condition of the alloy wire is simulated. And related test data are automatically kept in the test process, and corresponding software can be used for data processing after the test is finished.
The invention realizes different stress strain waveforms by changing the current waveform to realize the multi-mode control, and realizes the fatigue testing device with no shaking, no torsion, small friction force and long service life, thereby being capable of adapting to the fatigue tests under different working conditions.
Although the invention has been described in detail hereinabove with respect to specific embodiments thereof, it will be apparent to those skilled in the art that modifications and improvements can be made thereto without departing from the scope of the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed. Although the invention has been described in detail hereinabove with respect to specific embodiments thereof, it will be apparent to those skilled in the art that modifications and improvements can be made thereto without departing from the scope of the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (10)
1. A wire fatigue testing device, comprising: base (1), a plurality of support optical axis (2), go up backup pad (3), wherein a plurality of support optical axis (2) are vertical to be fixed on base (1), it is in to go up fixed the setting of backup pad (3) the top of a plurality of support optical axis (2), its characterized in that:
a displacement sensor fixing seat (5) is arranged at the central position of the optical axes of the brackets on the base (1), a displacement sensor (6) is arranged on the displacement sensor fixing seat, a middle supporting plate (7) is arranged above the displacement sensor (6), a through hole (8) is formed in the center of the middle supporting plate (7), a bracket (10) is arranged at the corresponding position on the upper supporting plate (3) vertically above the through hole (8), a tension sensor (11) and a copper column fixing column (12) are arranged on the bracket (10), and one end of a metal wire to be detected is fixed by the copper column fixing column (12) and is electrically connected with one end of a power supply box (16); the metal wire to be tested penetrates through the through hole (8) to naturally droop, and the other end of the metal wire to be tested is fixed on the guide post (13) and is electrically connected with the other end of the power supply box (16).
2. The wire fatigue testing device of claim 1, wherein a horizontal sliding table (9) is arranged below the middle support plate (7), a through hole corresponding to the through hole (8) is formed in the horizontal sliding table (9), and the guide column (13) vertically penetrates through the through hole of the horizontal sliding table (9).
3. The wire fatigue testing device of claim 1, wherein the support (10) is vertically height adjustable, and the intermediate support plate (7) is vertically height adjustable along the plurality of support optical axes (2).
4. The metal wire fatigue testing device of claim 1, wherein the plurality of holder optical axes (2) are connected to the base (1) through optical axis holders (4) located on the base (1), the number of the plurality of holder optical axes (2) is 3, and the holder optical axes are distributed on the base (1) in an equilateral triangle or isosceles triangle.
5. The wire fatigue testing device according to claim 2, wherein the guide post (13) moves in the through hole (8) in a guide contact manner or a magnetic post suspension manner.
6. A wire fatigue testing device according to claim 1, wherein a load carrier (14) with adjustable mass is connected below the guide post (13).
7. A wire fatigue testing device according to claim 1, wherein the displacement sensor (6) is height adjustable on the displacement sensor holder (5).
8. A wire fatigue testing device according to claim 1, wherein said intermediate support plate (7) is provided with a level (15).
9. The metal wire fatigue testing device of claim 1, wherein a power supply and a lower computer are arranged in the power supply box, a control module is arranged in the lower computer, the lower computer is connected with an upper computer (17), and the upper computer (17) communicates with the lower computer through a communication line and sends instructions.
10. The wire fatigue testing device of claim 1, wherein the power supply box is fixed above the upper support plate (3) or is provided separately from the upper support plate (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010125048.0A CN111238937A (en) | 2020-02-27 | 2020-02-27 | Metal wire fatigue test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010125048.0A CN111238937A (en) | 2020-02-27 | 2020-02-27 | Metal wire fatigue test device |
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| Publication Number | Publication Date |
|---|---|
| CN111238937A true CN111238937A (en) | 2020-06-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010125048.0A Pending CN111238937A (en) | 2020-02-27 | 2020-02-27 | Metal wire fatigue test device |
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| CN (1) | CN111238937A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113432852A (en) * | 2021-06-15 | 2021-09-24 | 泰安科鼎特工贸有限公司 | Braided rope fatigue testing device and testing method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1083589A (en) * | 1993-05-14 | 1994-03-09 | 浙江大学 | The pressure container fatigue test device of closed loop |
| CN101122559A (en) * | 2006-08-10 | 2008-02-13 | 北京有色金属研究总院 | Multifunctional tester for shape memory alloy wire material |
| CN101498653A (en) * | 2009-03-10 | 2009-08-05 | 北京科技大学 | Piezo-electricity driving fatigue testing machine used for fatigue life detection of adhesive structure |
| WO2011068280A1 (en) * | 2009-12-04 | 2011-06-09 | 선문대학교 산학협력단 | Stent fatigue testing apparatus using magnetostriction member |
| CN106053268A (en) * | 2016-05-10 | 2016-10-26 | 田凯 | Experiment device and method for measuring metal wire Young modulus based on simple harmonic vibration |
| CN108717025A (en) * | 2018-04-19 | 2018-10-30 | 电子科技大学 | A kind of two-way shape memory alloy heat-mechanical function fatigue characteristic testing device |
| CN109490061A (en) * | 2018-03-29 | 2019-03-19 | 中国科学院金属研究所 | The device and test method of environment fatigue experiment are carried out under a kind of waveform control condition |
-
2020
- 2020-02-27 CN CN202010125048.0A patent/CN111238937A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1083589A (en) * | 1993-05-14 | 1994-03-09 | 浙江大学 | The pressure container fatigue test device of closed loop |
| CN101122559A (en) * | 2006-08-10 | 2008-02-13 | 北京有色金属研究总院 | Multifunctional tester for shape memory alloy wire material |
| CN101498653A (en) * | 2009-03-10 | 2009-08-05 | 北京科技大学 | Piezo-electricity driving fatigue testing machine used for fatigue life detection of adhesive structure |
| WO2011068280A1 (en) * | 2009-12-04 | 2011-06-09 | 선문대학교 산학협력단 | Stent fatigue testing apparatus using magnetostriction member |
| CN106053268A (en) * | 2016-05-10 | 2016-10-26 | 田凯 | Experiment device and method for measuring metal wire Young modulus based on simple harmonic vibration |
| CN109490061A (en) * | 2018-03-29 | 2019-03-19 | 中国科学院金属研究所 | The device and test method of environment fatigue experiment are carried out under a kind of waveform control condition |
| CN108717025A (en) * | 2018-04-19 | 2018-10-30 | 电子科技大学 | A kind of two-way shape memory alloy heat-mechanical function fatigue characteristic testing device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113432852A (en) * | 2021-06-15 | 2021-09-24 | 泰安科鼎特工贸有限公司 | Braided rope fatigue testing device and testing method |
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