CN106525588B - Multi-deformation-mode self-adaptive extensometer - Google Patents
Multi-deformation-mode self-adaptive extensometer Download PDFInfo
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- CN106525588B CN106525588B CN201611089588.8A CN201611089588A CN106525588B CN 106525588 B CN106525588 B CN 106525588B CN 201611089588 A CN201611089588 A CN 201611089588A CN 106525588 B CN106525588 B CN 106525588B
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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
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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
- G01N2203/0017—Tensile
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The invention discloses a variable-form self-adaptive extensometer which comprises two positioning bolts, two bidirectional connecting nuts, two universal hinge assemblies, two connecting bolts, two connecting sleeves, a first telescopic steel pipe, a second telescopic steel pipe and an extensometer. The one-dimensional sample with a smaller section can be fixed in a binding mode through the positioning bolt with reasonable design; the samples with larger sections are fixed in a pre-buried mode, so that the application range of the variable-form-mode self-adaptive extensometer is enlarged; because the universal hinge assembly has good rotation performance in all directions, can adapt to various deformation conditions of the tested sample, ensures that when complex compound motions such as rotation, torsion, translation, dislocation and the like exist at two points at the same time, the axes of the first telescopic steel tube and the second telescopic steel tube are always in the same straight line and do not generate dislocation, can freely stretch in the axial direction, and the extensometer can still accurately measure the relative translation displacement of the two points.
Description
Technical Field
The invention belongs to the technical field of equipment and devices for measuring relative displacement, and particularly relates to a variable-deformation-mode self-adaptive extensometer for testing deformation of a sample under the action of axial load.
Background
Mechanical property tests of material stretching and compression generally require the use of extensometers to achieve real-time measurement of deformation of a sample under the action of axial load. Extensometers can be divided into two types, contact and non-contact. The contact type extensometer can be divided into a mechanical type extensometer and an electronic type extensometer, and in normal temperature mechanical property test, the mechanical extensometer is eliminated, and currently, a clamp type electronic extensometer is commonly used. Non-contact extensometers use digital imaging techniques to measure the deformation of a sample, also commonly referred to as optical extensometers. The optical extensometer has the advantages of no additional stress, large measuring range and the like, is an important direction of the development of the extensometer, but has great limitation in application due to the reasons of high price, poor use flexibility and the like.
At present, the most practical extensometer products are manually clamped clamp-type electronic extensometers in the fields of scientific research and engineering technology, and the extensometer is simple in structure, low in cost and convenient to operate, so that the extensometer is used in a large amount. However, the clamp type electronic extensometer can work normally only when the tested sample is deformed along the axis direction of the tested sample, so that the accuracy of a measuring result is ensured; when the tested sample is eccentrically loaded and deformed in the direction perpendicular to the axis direction of the tested sample, the axes of the two transmission rods of the clamp type electronic extensometer are staggered, so that the tested sample is blocked. This will reduce its normal performance during testing. In addition, the clamping type electronic extensometer senses that two single-edge blades with the elongated sample gauge length are bound on a test piece by using rubber bands, and the mounting mode can cause the problems of unstable mounting, influence on the accuracy of measurement and the like; moreover, the clamp type electronic extensometer cannot be bound and fixed on a sample with a larger section by using a rubber band, is only suitable for measuring a one-dimensional sample with a smaller section size, and has a narrower application range.
Disclosure of Invention
The invention aims to overcome the defects of the existing clamp type electronic extensometer and provides the variable-deformation-mode self-adaptive extensometer which is reasonable in design, strong in anti-interference capability, good in stability, reliable in connection, high in sensitivity, convenient to install and use and wide in application range.
The technical scheme adopted for solving the technical problems is as follows:
a variable form-factor adaptive extensometer, comprising:
the device comprises two positioning bolts, two bidirectional connecting nuts, two universal hinge assemblies, two connecting bolts, two connecting sleeves, a telescopic steel tube set and an extensometer; the universal hinge assembly comprises a spherical hinge connecting bolt and a spherical hinge top cap; the telescopic steel tube group comprises a first telescopic steel tube and a second telescopic steel tube; the extensometer comprises a test sensing box and a test baffle; the non-threaded end of the positioning bolt is fixed on the sample, the threaded end of the positioning bolt is connected with one end of a bidirectional connecting nut, the other end of the bidirectional connecting nut is connected with one threaded end of a spherical hinge connecting bolt, the non-threaded end of the spherical hinge connecting bolt is hinged with one end of a spherical hinge top cap, the other end of the spherical hinge top cap is connected with one threaded end of the connecting bolt, one end of the connecting bolt without threads is sleeved into one end of the connecting sleeve and fixed, one end of the first telescopic steel tube and one end of the second telescopic steel tube are sleeved into the other ends of the two connecting sleeves and fixed respectively, the other end of the first telescopic steel tube is sleeved into the other end of the second telescopic steel tube, the test baffle is sleeved on the first telescopic steel tube, and the test sensing box is sleeved on the second telescopic steel tube.
Preferably, the extensometer further includes: four fixing bolts; one end of the connecting bolt, which is not provided with threads, is sleeved into one end of the connecting sleeve and is fixed through the fixing bolt; one end of the first telescopic steel tube and one end of the second telescopic steel tube are sleeved into the other ends of the two connecting sleeves respectively and are fixed through fixing bolts respectively.
Preferably, the bottom of the thread of the positioning bolt is provided with an annular protrusion, which is used as a backing plate of the bidirectional connecting nut, thereby being beneficial to the fixation of the bidirectional connecting nut.
Preferably, a spanner clamping pad is arranged at the top of the thread of the spherical hinge connecting bolt, so that tools such as a spanner and the like can be conveniently used for screwing the spherical hinge connecting bolt into the bidirectional connecting nut.
Preferably, the spherical hinge top cap is provided with a preloaded spherical hinge protection soft sleeve, so that impurities can be prevented from entering the spherical hinge, and the rotation capability of the universal hinge assembly is guaranteed.
Preferably, one end of the spherical hinge top cap connected with the connecting bolt is provided with a prefabricated internal thread, so that the connecting bolt is conveniently fixed on the universal hinge assembly.
Preferably, the first telescopic steel tube is a solid steel tube, the second telescopic steel tube is a hollow steel tube, and the inner diameter of the second telescopic steel tube is slightly larger than the outer diameter of the first telescopic steel tube, so that the first telescopic steel tube can be sleeved into the second telescopic steel tube, and the axial telescopic performance of the telescopic steel tube group is ensured.
Preferably, a sensor box clamping groove is formed in the test sensing box, a baffle clamping groove is formed in the test baffle, and the test sensing box is sleeved on the first telescopic steel pipe through the sensor box clamping groove; the test baffle is sleeved on the second telescopic steel tube through a baffle clamping groove.
Preferably, the extensometer further includes: a sensor cartridge slot bolt and a baffle slot bolt; the sensor box clamping groove is provided with a through hole, and the sensor box clamping groove bolt can penetrate through the through hole on the sensor box clamping groove to fix the test sensing box on the first telescopic steel tube; the baffle clamping groove is provided with a through hole, and the baffle clamping groove bolt can penetrate through the through hole on the baffle clamping groove to fix the test baffle on the second telescopic steel tube.
Preferably, the telescopic steel tube set can be prefabricated to any length as required.
The technical scheme provided by the invention has the beneficial effects that:
by adopting the technical scheme, as the universal hinge assembly has good rotation performance in all directions, various deformation conditions of the tested sample can be self-adapted, and when complex compound motions such as rotation, torsion, translation and dislocation exist at two points at the same time, the axes of the telescopic steel tube A and the telescopic steel tube B are always in the same straight line and do not generate dislocation, the universal hinge assembly can freely stretch in the axial direction, and the extensometer can still accurately measure the translation displacement of the two points. The one-dimensional sample with a smaller section can be fixed in a binding mode through the positioning bolt with reasonable design; the sample with larger section is fixed in a pre-buried mode, so that the application range of the variable-deformation-mode self-adaptive extensometer is enlarged.
The present invention will be described in further detail with reference to the drawings and examples, but the present invention is not limited to the examples.
Drawings
FIG. 1 is a front view of a variable form factor adaptive extensometer of the present invention;
FIG. 2 is a left side view of a variable form factor adaptive extensometer of the present invention;
FIG. 3 is a top view of a variable form factor adaptive extensometer of the present invention;
FIG. 4 is a cross-sectional view taken at the A-A position of FIG. 3;
fig. 5 is a cross-sectional view of the B-B position of fig. 3.
Reference numerals: 1. positioning bolts, 2, two-way connecting nuts, 3, spherical hinge connecting bolts, 4, spherical hinge protection soft sleeves, 5, spherical hinge top caps, 6, connecting sleeves, 7, fixing bolts, 8, first telescopic steel pipes, 9, second telescopic steel pipes, 10, connecting bolts, 11, test sensor boxes, 12, test baffles, 13, sensor box clamping grooves, 14, sensor box clamping groove bolts, 15, baffle clamping grooves, 16 and baffle clamping groove bolts.
Detailed Description
Referring to fig. 1 to 5, a variable mode adaptive extensometer, comprising:
the device comprises two positioning bolts 1, two bidirectional connecting nuts 2, two universal hinge assemblies, two connecting bolts 10, two connecting sleeves 6, a telescopic steel tube set and an extensometer; the universal hinge assembly comprises a spherical hinge connecting bolt 3 and a spherical hinge top cap 5; the telescopic steel tube group comprises a first telescopic steel tube 8 and a second telescopic steel tube 9; the extensometer comprises a test sensing box 11 and a test baffle 12; the utility model discloses a test device, including locating bolt 1, ball pivot joint, connecting box, test baffle 12, connecting box, first scalable steel pipe 8 and second scalable steel pipe 9's one end that does not take screw is fixed on the sample, locating bolt 1 takes screw one end to be connected with the one end of two-way coupling nut 2, the other end of two-way coupling nut 2 is connected with ball pivot joint 3 takes screw one end, ball pivot joint 3 takes screw one end to articulate with ball pivot joint top cap 5, the other end of ball pivot top cap 5 is connected with connecting bolt 10 takes screw one end, connecting bolt 10 takes screw one end to embolias the one end of adapter sleeve 6 and fix, the one end of first scalable steel pipe 8 and the one end of second scalable steel pipe 9 embolias respectively two adapter sleeve's the other end and fix, the other end of first scalable steel pipe 8 embolias the other end of second scalable steel pipe 9, test baffle 12 cup joints on the first scalable steel pipe 8, test sensor box 11 cup joints on the second scalable steel pipe 9.
Further, the extensometer further includes:
four fixing bolts 7; one end of the connecting bolt 10 without threads is sleeved into one end of the connecting sleeve 6 and is fixed through the fixing bolt 7; one end of the first telescopic steel tube 8 and one end of the second telescopic steel tube 9 are respectively sleeved into the other ends of the two connecting sleeves 6 and are respectively fixed through fixing bolts 7.
Specifically, the connecting bolt 10 is provided with a through hole at one end without threads, through holes are formed at two ends of the connecting sleeve 6, and through holes are formed at one end of the first telescopic steel tube 8 and one end of the second telescopic steel tube 9, so that the fixing bolt 7 can pass through the through holes to be fastened.
Further, the annular protrusion is arranged at the bottom of the thread of the positioning bolt 1 and used as a backing plate of the bidirectional connecting nut 2, which is beneficial to the fixation of the bidirectional connecting nut.
Further, a spanner clamping pad is arranged at the top of the thread of the spherical hinge connecting bolt 3, so that tools such as a spanner can be conveniently used for screwing the spherical hinge connecting bolt into the bidirectional connecting nut.
Further, the spherical hinge top cap 5 is provided with the spherical hinge protection soft sleeve 4 which is preassembled, so that impurities can be prevented from entering the spherical hinge, and the rotation capability of the universal hinge assembly is guaranteed.
Further, the end of the spherical hinge top cap 5 connected with the connecting bolt 10 is provided with a prefabricated internal thread, which is beneficial for fixing the connecting bolt on the universal hinge assembly.
Further, the first telescopic steel tube 8 is a solid steel tube, the second telescopic steel tube 9 is a hollow steel tube, and the inner diameter of the second telescopic steel tube 9 is slightly larger than the outer diameter of the first telescopic steel tube 8, so that the first telescopic steel tube 8 can be sleeved into the second telescopic steel tube 9, and the axial telescopic performance of the telescopic steel tube set is ensured.
Further, a sensor box clamping groove 13 is formed in the test sensing box 11, a baffle clamping groove 15 is formed in the test baffle 12, and the test sensing box 11 is sleeved on the first telescopic steel tube 8 through the sensor box clamping groove 13; the test baffle 12 is sleeved on the second telescopic steel tube 9 through a baffle clamping groove 15.
Further, the extensometer further includes:
a sensor cartridge slot bolt 14 and a baffle slot bolt 16; the sensor box clamping groove 13 is provided with a through hole, and the sensor box clamping groove bolt 14 can penetrate through the through hole on the sensor box clamping groove 13 to fix the test sensing box 11 on the first telescopic steel tube 8; the baffle clamping groove 15 is provided with a through hole, and the baffle clamping groove bolt 16 can penetrate through the through hole on the baffle clamping groove 15 to fix the test baffle 12 on the second telescopic steel tube 9.
Further, the telescopic steel tube sets are prefabricated to any length according to requirements.
In this embodiment, the universal hinge is a factory product commodity, and can be purchased directly as required, in this embodiment, a bolt (spherical hinge connecting bolt 3) with a special form in the vertical direction is selected, a bolt hole (the connecting part of the spherical hinge top cap 5 and the connecting bolt) is reserved in the horizontal direction, and a protective soft sleeve is arranged.
In the embodiment, the extensometer is a factory finished product commodity, can be purchased directly as required, and the measuring range of the installed extensometer is determined according to specific test requirements.
In the embodiment, the cross section of the bidirectional connecting nut is regular hexagon, the spherical hinge top cap is semicircular sphere, the cross sections of the connecting sleeve and the telescopic steel tube set are circular rings or round, and various bolts are cylindrical, so that the whole line of the embodiment is clear and round, and the appearance is concise and attractive.
The specific working principle of the invention is as follows:
in this embodiment, since the universal hinge assembly has good rotation performance in all directions, it can adapt to various deformation conditions of the tested sample, and ensure that when complex compound motions such as rotation, torsion, translation, dislocation and the like exist at two points at the same time, the axes of the first telescopic steel tube 8 and the second telescopic steel tube 9 are always in the same straight line and do not generate dislocation, and can freely stretch in the axial direction, and the extensometer can still accurately measure the relative translation displacement of the two points.
Specifically, the manufacturing method of the variable-deformation-mode self-adaptive extensometer comprises the following steps:
(1) The unthreaded ends of the two positioning bolts are pre-embedded (mounted) in (on) the sample according to a specified sample gauge.
In the embodiment, the positioning bolts with reasonable design can be used for fixing the one-dimensional samples with smaller sections in a binding mode, namely, one ends of the two positioning bolts without threads are pre-arranged on the samples according to the specified sample gauge length; the sample with larger section is fixed in a pre-buried mode, namely, one end of the two positioning bolts without threads is pre-buried in the sample according to the specified sample gauge length, so that the application range of the variable deformation mode self-adaptive extensometer is enlarged.
(2) And screwing any one end of the two bidirectional connecting nuts into one threaded end of the two positioning bolts for fixation.
(3) One end of the universal hinge assembly with the spherical hinge connecting bolt is screwed into and fixed on the other end of the bidirectional connecting nut, and one threaded end of the two connecting bolts is screwed into and fixed in the spherical hinge top cap.
(4) And (3) sleeving one unthreaded end of the connecting bolt at any one end of the two connecting sleeves, and fixing the connecting sleeves by using a fixing bolt.
(5) When the clamping grooves of the test baffle plate and the test sensing box are in a relaxed state, the test baffle plate and the clamping grooves of the test sensing box are sleeved into the first telescopic steel pipe and the second telescopic steel pipe respectively, then the first telescopic steel pipe is sleeved into the second telescopic steel pipe, and then the two free ends of the telescopic steel pipe group are sleeved into the connecting sleeve by adjusting the proper length and are fixed by fixing bolts.
(6) After the test baffle and the test sensing box are adjusted to proper positions, the clamping groove bolts are screwed down to fix the test baffle and the test sensing box on the first telescopic steel tube and the second telescopic steel tube respectively.
The present invention has been described in detail with reference to the drawings, but the embodiments of the present invention are not limited to the above embodiments, and those skilled in the art can make various modifications to the present invention according to the prior art, such as changing the first telescopic steel tube in the above example from solid to hollow or changing the spherical hinge top cap in the above example from hemispherical to cubic, etc., which are all within the scope of the present invention.
Claims (10)
1. A variable form-factor adaptive extensometer, comprising:
the device comprises two positioning bolts (1), two bidirectional connecting nuts (2), two universal hinge assemblies, two connecting bolts (10), two connecting sleeves (6), a telescopic steel tube set and an extensometer; the universal hinge assembly comprises a spherical hinge connecting bolt (3) and a spherical hinge top cap (5); the telescopic steel tube group comprises a first telescopic steel tube (8) and a second telescopic steel tube (9); the extensometer comprises a test sensing box (11) and a test baffle (12); the utility model discloses a test box, including test box, connecting box, positioning bolt, ball pivot jack cap, connecting bolt, first scalable steel pipe (8), second scalable steel pipe (9), positioning bolt (1) is fixed on the sample with the one end of screw thread, positioning bolt (1) threaded one end is connected with the one end of two-way coupling nut (2), the other end of two-way coupling nut (2) is connected with ball pivot connecting bolt (3) threaded one end, ball pivot connecting bolt (3) unthreaded one end is articulated with ball pivot jack cap (5), the other end of ball pivot jack cap (5) is connected with connecting bolt (10) threaded one end, one end of connecting bolt (10) unthreaded one end is emboliaed and is fixed of connecting sleeve (6), the one end of first scalable steel pipe (8) and the one end of second scalable steel pipe (9) embolia) are emboliaed the other end of two connecting sleeve (6) respectively and are fixed, the other end of first scalable steel pipe (8) is emboliaed the other end of second scalable steel pipe (9), test baffle (12) cup joint on first scalable steel pipe (8), test box (11) are in second scalable on.
2. The multiple deformation mode adaptive extensometer of claim 1 wherein the extensometer further includes:
four fixing bolts (7); one end of the connecting bolt (10) without threads is sleeved into one end of the connecting sleeve (6) and is fixed through the fixing bolt (7); one end of the first telescopic steel tube (8) and one end of the second telescopic steel tube (9) are sleeved into the other ends of the two connecting sleeves (6) respectively and are fixed through fixing bolts (7) respectively.
3. The multiple deformation mode adaptive extensometer of claim 1 wherein:
the bottom of the thread of the positioning bolt (1) is provided with an annular bulge which is used as a backing plate of the bidirectional connecting nut (2).
4. The multiple deformation mode adaptive extensometer of claim 1 wherein:
the top of the thread of the spherical hinge connecting bolt (3) is provided with a spanner clamping pad.
5. The multiple deformation mode adaptive extensometer of claim 1 wherein:
the spherical hinge top cap (5) is provided with a preassembled spherical hinge protection soft sleeve (4).
6. The multiple deformation mode adaptive extensometer of claim 1 wherein:
one end of the spherical hinge top cap (5) connected with the connecting bolt (10) is provided with a prefabricated internal thread.
7. The multiple deformation mode adaptive extensometer of claim 1 wherein:
the first telescopic steel tube (8) is a solid steel tube, the second telescopic steel tube (9) is a hollow steel tube, and the inner diameter of the second telescopic steel tube (9) is slightly larger than the outer diameter of the first telescopic steel tube (8), so that the first telescopic steel tube (8) can be sleeved into the second telescopic steel tube (9).
8. The multiple deformation mode adaptive extensometer of claim 1 wherein:
the test sensing box (11) is provided with a sensor box clamping groove (13), the test baffle (12) is provided with a baffle clamping groove (15), and the test sensing box (11) is sleeved on the first telescopic steel tube (8) through the sensor box clamping groove (13); the test baffle (12) is sleeved on the second telescopic steel tube (9) through a baffle clamping groove (15).
9. The multiple deformation mode adaptive extensometer of claim 8 wherein the extensometer further includes:
a sensor cartridge slot bolt (14) and a baffle slot bolt (16); the sensor box clamping groove (13) is provided with a through hole, and the sensor box clamping groove bolt (14) can penetrate through the through hole in the sensor box clamping groove (13) to fix the test sensing box (11) on the first telescopic steel tube (8); the baffle clamping groove (15) is provided with a through hole, and the baffle clamping groove bolt (16) can penetrate through the through hole in the baffle clamping groove (15) to fix the test baffle (12) on the second telescopic steel tube (9).
10. The multiple deformation mode adaptive extensometer of claim 1 wherein:
the telescopic steel tube set is prefabricated to any length according to the requirement.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611089588.8A CN106525588B (en) | 2016-12-01 | 2016-12-01 | Multi-deformation-mode self-adaptive extensometer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611089588.8A CN106525588B (en) | 2016-12-01 | 2016-12-01 | Multi-deformation-mode self-adaptive extensometer |
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| CN106525588B true CN106525588B (en) | 2023-06-23 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107179233B (en) * | 2017-05-16 | 2019-08-23 | 中国建筑股份有限公司 | A kind of multidirectional measurement mounting device of displacement sensor |
| CN112577737B (en) * | 2020-11-26 | 2022-10-18 | 人本股份有限公司 | Linear bearing durability test tool |
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