CN114838693A - Connecting device for measuring indentation depth by using displacement meter and using method - Google Patents
Connecting device for measuring indentation depth by using displacement meter and using method Download PDFInfo
- Publication number
- CN114838693A CN114838693A CN202210251718.2A CN202210251718A CN114838693A CN 114838693 A CN114838693 A CN 114838693A CN 202210251718 A CN202210251718 A CN 202210251718A CN 114838693 A CN114838693 A CN 114838693A
- Authority
- CN
- China
- Prior art keywords
- pressure head
- connecting device
- displacement
- displacement meter
- hole
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/18—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring depth
-
- 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
-
- 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
- G01N3/40—Investigating hardness or rebound hardness
- G01N3/42—Investigating hardness or rebound hardness by performing impressions under a steady load by indentors, e.g. sphere, pyramid
-
- 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
- G01N2203/0001—Type of application of the stress
- G01N2203/0003—Steady
-
- 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
-
- 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
- G01N2203/0076—Hardness, compressibility or resistance to crushing
- G01N2203/0078—Hardness, compressibility or resistance to crushing using indentation
-
- 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
Landscapes
- 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 connecting device for measuring indentation depth by using a displacement meter and a measuring method thereof. The device and the measuring method thereof have the advantages of simple structure, high measuring accuracy of the indentation depth, deformation of the indentation depth measuring result caused by test equipment and tools, and small influence of the clamping verticality of the displacement meter. The device can accurately measure the indentation depth, thereby improving the accuracy of calculating the mechanical property of the measured material through indentation action information.
Description
Technical Field
The invention belongs to the technical field of mechanical property testing of metal and non-metal materials, and particularly relates to a connecting device for measuring indentation depth by using a displacement meter and a using method.
Background
Nondestructive mechanical property test of the in-service material is the key for evaluating the service state and reliability of the in-service material. The micro-indentation technology is a technology for nondestructively detecting the mechanical performance developed in recent years. The method comprises the steps of driving a spherical pressure head through a motor, vertically pressing the spherical pressure head into the surface of a material to be tested, carrying out a cyclic process of multiple loading and partial unloading on the same action point, measuring indentation depth and load to obtain a load-indentation depth curve in the whole micro indentation test process, converting the curve into a true stress-true plastic strain curve of the material, establishing a mechanical constitutive relation model of the material, and correlating the mechanical properties of the material, such as tensile strength, yield strength, indentation deformation energy, strain hardening index, strength coefficient and the like. Compared with a hardness test, the micro-indentation technology can obtain more mechanical property parameters, has high accuracy and the characteristics of no damage and high speed, and is particularly suitable for field detection of the mechanical property of in-service materials.
In the micro-indentation test, the measurement precision of the indentation depth directly determines the calculation precision of the mechanical property of the measured material, and how to accurately measure the indentation depth is one of the keys of the micro-indentation test. The existing indentation depth measuring method comprises the following steps: 1, obtaining action depth through the displacement of a beam of a pressure head driving mechanism. The method does not need an additional measuring device, but the deformation of the whole device in the test process is calculated in the indentation depth, and even if the rigidity correction of the device is carried out, a large error is generated between the actual action depth and the deformation. And 2, measuring the indentation size of the tested material after the test, and calculating the action depth by combining the geometric relation of the pressure head. The method is an indirect measuring method, the efficiency is low, and the measuring error of the indentation depth is large due to the elastic rebound effect during unloading.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides a connecting device for measuring indentation depth by using a displacement meter and a measuring method thereof. The device can accurately measure the indentation depth, thereby improving the accuracy of calculating the mechanical property of the measured material through indentation action information.
One of the purposes of the invention adopts the following technical scheme: the utility model provides an use displacement meter to measure connecting device of indentation degree of depth, includes pressure head, displacement meter and pressure head connecting device, the vestibule that is used for installing the pressure head is offered to pressure head connecting device's first end, the central axis of vestibule coincides mutually with pressure head connecting device's central axis, and the displacement meter parallels with the pressure head, and the displacement meter passes through displacement meter connecting device and pressure head connecting device fixed connection, and the displacement meter end is parallel and level mutually with the end of pressure head for measure the indentation effect degree of depth of pressure head.
Preferably, the two displacement meters are symmetrically arranged on two sides of the pressure head connecting device.
Preferably, the two displacement meter connecting devices are provided, an outer annular groove is formed on the outer cylindrical surface of the pressure head connecting device corresponding to the tail part of the pressure head, and opposite ends of the two displacement connecting devices are tightly clamped in the outer annular groove of the pressure head connecting device.
Preferably, the displacement connecting device comprises an arc-shaped connecting part, a horizontal section, a vertical section and a displacement meter mounting section, an arc-shaped groove is formed in the butt joint end face of the arc-shaped connecting part, the arc-shaped groove is matched with the outer annular groove, corresponding fastening screw holes are formed in two sides of the arc-shaped groove, the horizontal section is perpendicular to the pressure head connecting device, the vertical section extends from one end of the horizontal section to the opposite direction of the extension of the pressure head, the displacement meter mounting section is connected with the vertical section and perpendicular to the pressure head connecting device, a mounting through hole for fixing the displacement meter is formed in the outer end part of the displacement meter mounting section, a second jackscrew hole is formed in one side of the mounting through hole, and the mounting through hole is communicated with the second jackscrew hole.
As preferred scheme, still include testing machine connecting device, testing machine connecting device includes first connecting portion and second connecting portion, and first connecting portion and the coaxial setting of second connecting portion, first connecting portion meet with the testing machine interface, and the second connecting portion connects with the one end of first connecting portion, and the other end of first connecting portion is formed with the internal thread hole that is used for being connected with pressure head connecting device, and pressure head connecting device is provided with the external screw thread head with internal thread hole matched with the relative tip of pressure head.
The second purpose of the invention adopts the following technical scheme:
a use method of a connecting device for measuring indentation depth by using a displacement meter specifically comprises the following steps:
step one, screwing an external thread head at one end of a pressure head connecting device into an internal thread hole of a testing machine connecting device;
step two, the arc-shaped connecting parts at one ends of the two displacement meter connecting devices are installed in an outer annular groove of the pressure head connecting device in a butt joint mode, and are screwed into fastening screw holes on two sides of the arc-shaped groove through fastening bolts to be fixed after being aligned;
thirdly, one end of the pressure head is placed into a hole cavity at one end of the pressure head connecting device, one exposed side of the pressure head is pressed by hands to enter the hole cavity, and the first jackscrew bolt is screwed into the first jackscrew hole of the pressure head connecting device until the pressure head is fixed in the pressure head connecting device;
step four, connecting the assembled device with a testing machine through a connecting device of the testing machine;
fifthly, placing the two displacement meters into the mounting through holes of the displacement meter connecting devices on the two sides respectively, adjusting the displacement meters to be flush with the end heads of the pressure heads, enabling the end heads of the two displacement meters to be located in the same plane, and screwing second jackscrew bolts into second jackscrew holes in the side faces of the displacement meter connecting devices respectively to finish fastening the displacement meters;
placing the sample below the pressure head, placing a gasket with proper thickness below the displacement meter according to the shape and size of the sample, and starting test detection;
and seventhly, obtaining the numerical values of the displacement meters on the two sides, and solving the average measurement value of the two displacement meters as the final indentation depth measurement result.
Compared with the prior art, the invention has the following beneficial effects:
firstly, the structure is improved, so that the scheme has the advantages of simplicity, reasonability, high indentation depth measurement accuracy and small influence of the indentation depth measurement result on the deformation of test equipment and a tool and the clamping verticality of a displacement meter. The device can accurately measure the indentation depth, thereby improving the mechanical property characterization precision. The specific analysis is as follows: according to the scheme, the longitudinal distance between the joint of the displacement meter and the pressure head is reduced as much as possible, so that the interference of deformation of equipment and a connecting device to a measuring result in the indentation depth measuring process is reduced, and the indentation depth measuring accuracy is obviously improved. And the connecting parts of the two outer sides of the displacement meter connecting device are higher than the arc-shaped connecting part, so that after the displacement meter is installed, the test contact of the displacement meter and the test pressure head are on the same plane, and the problem that after the displacement meter is installed, the test contact is obviously lower than the pressure head due to the fact that the longitudinal distance between the connecting part of the displacement meter and the pressure head is too small is avoided. The scheme reduces the interference of deformation of the test equipment and the tool on indentation depth measurement as much as possible, and meets the requirement of accurate measurement of indentation depth in an indentation test.
Secondly, this scheme is through using two displacement meters of symmetry installation, through reading the average value of two displacement meters to reduced displacement meter out of perpendicular to the horizontal plane and to the interference of indentation degree of depth measurement in the displacement meter installation, reduced the influence of displacement meter installation to indentation degree of depth measurement's accuracy.
Thirdly, the measuring method of the scheme combines with the connecting device, thereby improving the measuring method, after the connecting device is additionally arranged on the testing machine before measurement, the depth of the indentation is assisted to be measured by adopting the displacement meter connecting device with a specific structure, two sides of the displacement meter connecting device are respectively connected with one displacement meter, when a single test is carried out, the measuring data of the depths of the two indentations are read, the average measuring value of the two displacement meters is taken as the indentation depth, the error generated when the deformation of the two sides is not uniform or the stress is not vertical to the testing plane is greatly reduced, and the measuring efficiency and the measuring precision of the displacement meter are effectively improved.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
FIG. 1 is a block diagram of a connector of the present invention;
FIG. 2 is a schematic view of the assembly of the connector of the present invention;
FIG. 3 is a schematic view of the docking of the displacement meter attachment means;
FIG. 4 is an indentation load-depth curve measured when a single displacement gauge is connected below a beam of a testing machine in the prior art;
FIG. 5 is an indentation load-depth curve of a device of the present invention connected to a dual displacement gauge test;
the labels in the figure are: 1. testing machine connecting device, 11, the internal thread hole, 2, the pressure head connecting device, 21, the vestibule, 22, outer annular groove, 23, the external screw thread head, 24, first jackscrew screw hole, 3, the displacement connecting device, 301, first jackscrew bolt, 302, second jackscrew bolt, 303, fastening bolt, 31, arc connecting portion, 311, the arc recess, 312, fastening screw hole, 32, the horizontal segment, 33, the vertical segment, 34, the displacement meter installation section, 341, the installation through-hole, 342, the second jackscrew hole, 4, the displacement meter, 5, the pressure head.
Detailed Description
The invention is described in detail below by way of exemplary embodiments. It should be understood, however, that elements, structures and features of one embodiment may be beneficially incorporated in other embodiments without further recitation.
It should be noted that: unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of the terms "a" and "an" or "the" and similar referents in the description and claims of the present invention are not to be construed as limiting in number, but rather as indicating the presence of at least one. The word "comprise" or "comprises", and the like, indicates that the element or item listed before "comprises" or "comprising" covers the element or item listed after "comprising" or "comprises" and its equivalents, but does not exclude other elements or items having the same function.
As shown in fig. 1, the present embodiment provides a connecting device for measuring indentation depth by using a displacement meter, which mainly comprises a testing machine connecting device 1, a pressure head connecting device 2, two displacement meter connecting devices 3, two displacement meters 4 and a pressure head 5, wherein the testing machine connecting device 1, the pressure head connecting device 2 and the pressure head 5 are coaxially connected from top to bottom. Pressure head 5 is packed into in pressure head connecting device 2 along bottom vestibule 21, and displacement meter connecting device 3 symmetry is installed in pressure head connecting device 2's both sides, and displacement meter 4 is installed in displacement meter connecting device 3 one end of keeping away from pressure head connecting device 2, and pressure head even device 2 is connected under testing machine connecting device 1.
In this scheme, testing machine connecting device 1's whole comprises two sections of different cylinder structures of diameter, and the shape and size of upper portion matching test machine interface for be connected with the testing machine, open at the lower part center has central screw hole, is used for being connected with pressure head connecting device 2. Specifically, the tester connecting device 1 may adopt the following structure: including first connecting portion and second connecting portion, first connecting portion and the coaxial setting of second connecting portion, first connecting portion meet with the testing machine interface, and the second connecting portion connects with the one end of first connecting portion mutually, and the other end of first connecting portion is formed with the internal thread hole 11 that is used for being connected with pressure head connecting device 2.
In this embodiment, as shown in fig. 1, the main body of the indenter connector 2 is cylindrical, the upper portion of the indenter connector 2 is an external screw 23 for connecting with the internal screw hole 11 of the tester connector 1, the bottom center of the indenter connector 2 is provided with a hole cavity 21, a first jackscrew hole 24 is formed in the side surface of the indenter connector 2 near one end of the hole cavity 21, the first jackscrew hole 24 is perpendicular to and communicated with the hole cavity 21, and the central axis of the hole cavity 21 coincides with the central axis of the main body of the indenter connector 2. The mounting end of the pressure head 5 is arranged in the hole cavity 21 of the pressure head connecting device 2 and is screwed into the first jackscrew bolt 301 through the first jackscrew screw hole 24 on the side edge for fastening. An outer annular groove 22 is formed on the outer cylindrical surface of the indenter connecting device 2 at a position corresponding to the tail of the indenter 5, and opposite ends of the two displacement connecting devices 3 are tightly fitted into the outer annular groove 22 of the indenter connecting device 2.
Referring to fig. 2 and 3, the displacement coupling device 3 includes an arc-shaped coupling portion 31, a horizontal section 32, a vertical section 33, and a displacement meter mounting section 34, an arc-shaped groove 311 is formed at an abutting end surface of the arc-shaped coupling portion, the arc-shaped groove 311 is engaged with the outer annular groove 22, fastening screw holes 312 are formed at both sides of the arc-shaped groove 311, and the fastening screw holes 312 may couple both portions of the displacement meter coupling device 3 with the ram coupling device 2 by means of bolts. The horizontal section 32 is perpendicular to the pressure head connecting device 2, the vertical section 33 extends from one end of the horizontal section 32 to the opposite direction of the pressure head 5, the displacement meter mounting section 34 is connected with the vertical section 33 and is perpendicular to the pressure head connecting device 2, a mounting through hole 341 for the displacement meter 4 is formed at the outer end part of the displacement meter mounting section 34, and a second jackscrew hole 342 is formed at one side of the mounting through hole 341 and communicated with the mounting through hole. Penetrate second jackscrew bolt 302 in second jackscrew screw 342 and fix displacement meter 4, installation through-hole 341 one side is higher than arc connecting portion 31 one end for the contact and the pressure head 5 of displacement meter 4 are at same horizontal plane after the assembly, convenient measurement. And two sides of the displacement meter connecting device 3 are respectively connected with one displacement meter 4.
Through improvement, the measuring error of the displacement meter 4 is reduced to the lowest as possible, and the displacement meter 4 is directly installed at the pressure head 5, so that the influence of tool deformation is eliminated. The existing method for measuring by using a single displacement meter has high requirement on the verticality during clamping of the displacement meter, and if the displacement meter is not perpendicular to the test surface, the measurement result has great deviation. During testing, the average measured values of the two displacement meters 4 are taken as the indentation depth, so that errors caused by uneven deformation on two sides or non-perpendicular stress on the test plane are greatly reduced, and the installation efficiency of the displacement meters 4 is improved.
The use method of the device comprises the following steps: a. screwing the external thread head 23 at one end of the pressure head connecting device 2 into the internal thread hole 11 of the testing machine connecting device 1; b. the arc-shaped connecting part 31 at one end of the two displacement meter connecting devices 3 is oppositely arranged in the outer annular groove 22 of the pressure head connecting device 2, and after the arc-shaped connecting part is aligned, the fastening bolts 303 are screwed into the fastening screw holes 312 at two sides for fastening; c. placing the pressure head 5 into the circular hole cavity 21 at one end of the pressure head connecting device 2, pressing the exposed side of the pressure head 5 by hands, and screwing the first jackscrew bolt 301 into the first jackscrew screw hole 24 of the pressure head connecting device 2 until the pressure head 5 is fixed in the pressure head connecting device 2; d. connecting the assembled device with a testing machine through a testing machine connecting device 1; e. placing two displacement meters 4 into the mounting through holes 341 of the displacement meter connecting devices 3 on two sides respectively, adjusting the displacement meters 4 to be perpendicular to the horizontal plane by visual observation, and screwing the second jackscrew bolts 302 into the second jackscrew holes 342 on the side faces of the round holes of the displacement meter connecting devices 3 respectively to finish fastening the displacement meters 4; f. placing a sample below the pressure head 5, and placing a gasket with proper thickness below the displacement meter 4 according to the shape and size of the sample, so as to start the test; the gasket can be used by overlapping a plurality of thin gaskets, the total thickness of the thin gaskets is basically the same as or the same as that of the sample, and the corresponding thin gaskets can be increased or decreased according to the thickness of the sample when in use; g. and acquiring the numerical values of the displacement meters 4 on the two sides, and solving the average measurement value of the two displacement meters 4 as the final indentation depth measurement result.
After the detection is finished, the disassembly sequence is the reverse sequence during installation: h. screwing out the second jackscrew bolt 302 and taking the displacement meter 4 out of the displacement meter connecting device 3; i. removing the device from the testing machine; j. screwing out the first jackscrew bolt 301, taking out the pressure head 5 from the pressure head connecting device 2, screwing out the fastening bolt 303, and taking out the displacement meter connecting device 3 from the pressure head connecting device 2; k. and (4) unscrewing the pressure head connecting device 2 from the testing machine connecting device 1, namely completing the disassembly.
In the invention, after the surface of a certain 5 series aluminum alloy plate is polished, a single displacement meter is respectively connected below a beam of a testing machine to carry out indentation test, and the indentation test is compared with the indentation test carried out by connecting a double displacement meter by using the device of the invention, as shown in fig. 4 and 5. Fig. 4 shows an indentation load-depth curve measured by connecting a single displacement meter below a cross beam of a testing machine in the prior art, wherein due to deformation of a tooling below the cross beam, a large arc line segment appears at the initial section of the indentation load-depth curve, and an arc line appears at an unloading curve when the load is small. Fig. 5 shows that the initial section of the curve of indentation load-depth shows a characteristic of approximately straight line rising and also shows a good straight line characteristic during unloading when the device of the present invention is used for performing an indentation test, which illustrates that the measurement of indentation depth can effectively avoid the interference of the deformation of the testing machine and the connecting device on the measurement result when the device of the present invention is used for performing the indentation test.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (6)
1. A connecting device for measuring indentation depth using a displacement gauge, characterized in that: the pressure head comprises a pressure head, a displacement meter and a pressure head connecting device, wherein a hole cavity used for installing the pressure head is formed in the first end of the pressure head connecting device, the central axis of the hole cavity coincides with the central axis of the pressure head connecting device, the displacement meter is parallel to the pressure head and is fixedly connected with the pressure head connecting device through the displacement meter connecting device, and the end head of the displacement meter is parallel and level to the end head of the pressure head and used for measuring the indentation action depth of the pressure head.
2. The coupling device for measuring indentation depth using a displacement gauge as claimed in claim 1, wherein: the displacement meters are arranged in two numbers and are symmetrically arranged on two sides of the pressure head connecting device.
3. The coupling device for measuring indentation depth using a displacement gauge as claimed in claim 2, wherein: the displacement meter connecting devices are provided with two displacement meter connecting devices, outer annular grooves are formed in the positions, corresponding to the tail portions of the pressure heads, of the outer cylindrical surfaces of the pressure head connecting devices, and the opposite ends of the two displacement connecting devices are tightly hooped in the outer annular grooves of the pressure head connecting devices.
4. A coupling device for measuring indentation depth using a displacement gauge, as claimed in claim 3, wherein: the displacement connecting device comprises an arc-shaped connecting part, a horizontal section, a vertical section and a displacement meter mounting section, an arc-shaped groove is formed in the butt joint end face of the arc-shaped connecting part, the arc-shaped groove is matched with the outer annular groove, corresponding fastening screw holes are formed in the two sides of the arc-shaped groove, the horizontal section is perpendicular to the pressure head connecting device, the vertical section extends in the opposite direction from one end of the horizontal section to the pressure head, the displacement meter mounting section is connected with the vertical section and perpendicular to the pressure head connecting device, a mounting through hole for fixing the displacement meter is formed in the outer end part of the displacement meter mounting section, a second jackscrew hole is formed in one side of the mounting through hole, and the mounting through hole is communicated with the second jackscrew hole.
5. A coupling device for measuring indentation depth using a displacement gauge, as claimed in claim 3, wherein: still include testing machine connecting device, testing machine connecting device includes first connecting portion and second connecting portion, and first connecting portion and the coaxial setting of second connecting portion, first connecting portion meet with the testing machine interface, and the second connecting portion meet with the one end of first connecting portion, and the other end of first connecting portion is formed with the internal thread hole that is used for being connected with pressure head connecting device, and pressure head connecting device is provided with the external screw thread head with internal thread hole matched with the tip that the pressure head is relative.
6. A method of using a coupling device for measuring indentation depth using a displacement gauge, comprising: the method specifically comprises the following steps:
step one, screwing an external thread head at one end of a pressure head connecting device into an internal thread hole of a testing machine connecting device;
step two, the arc-shaped connecting parts at one ends of the two displacement meter connecting devices are installed in an outer annular groove of the pressure head connecting device in a butt joint mode, and are screwed into fastening screw holes on two sides of the arc-shaped groove through fastening bolts to be fixed after being aligned;
thirdly, one end of the pressure head is placed into a hole cavity at one end of the pressure head connecting device, one exposed side of the pressure head is pressed by hands to enter the hole cavity, and the first jackscrew bolt is screwed into the first jackscrew hole of the pressure head connecting device until the pressure head is fixed in the pressure head connecting device;
step four, connecting the assembled device with a testing machine through a connecting device of the testing machine;
fifthly, placing the two displacement meters into the mounting through holes of the displacement meter connecting devices on the two sides respectively, adjusting the displacement meters to be flush with the end heads of the pressure heads, enabling the end heads of the two displacement meters to be located in the same plane, and screwing second jackscrew bolts into second jackscrew holes in the side faces of the displacement meter connecting devices respectively to finish fastening the displacement meters;
placing the sample below the pressure head, placing a gasket with proper thickness below the displacement meter according to the shape and size of the sample, and starting test detection;
and seventhly, obtaining the numerical values of the displacement meters on the two sides, and solving the average measurement value of the two displacement meters as the final indentation depth measurement result.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210251718.2A CN114838693B (en) | 2022-03-15 | 2022-03-15 | Connecting device for measuring indentation depth by using displacement meter and using method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210251718.2A CN114838693B (en) | 2022-03-15 | 2022-03-15 | Connecting device for measuring indentation depth by using displacement meter and using method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114838693A true CN114838693A (en) | 2022-08-02 |
| CN114838693B CN114838693B (en) | 2023-09-29 |
Family
ID=82562939
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210251718.2A Active CN114838693B (en) | 2022-03-15 | 2022-03-15 | Connecting device for measuring indentation depth by using displacement meter and using method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114838693B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007139592A (en) * | 2005-11-18 | 2007-06-07 | Saitama Prefecture | Instrument of measuring ultramicro hardness or the like and measuring method |
| JP2011013033A (en) * | 2009-06-30 | 2011-01-20 | Wd Media Singapore Pte Ltd | Nano indentation test method and apparatus of the same |
| KR20110057475A (en) * | 2009-11-24 | 2011-06-01 | (주)프론틱스 | Apparatus for indentation test involving micom and evaluating method of residual stress using the same |
| CN102288501A (en) * | 2011-07-25 | 2011-12-21 | 吉林大学 | Precise nanoindentation test device |
| CN106404574A (en) * | 2016-10-11 | 2017-02-15 | 吉林大学 | High-temperature micro-nano press mark test device and method in vacuum environment |
| CN107271261A (en) * | 2017-06-22 | 2017-10-20 | 中国船舶重工集团公司第七二五研究所 | A kind of servicing unit of fastener tension test in kind and the method tested with it |
| CN109540663A (en) * | 2018-10-18 | 2019-03-29 | 吉林大学 | Modification method of the concora crush head verticality to impression test mechanical parameters |
| CN211652407U (en) * | 2019-10-14 | 2020-10-09 | 东莞材料基因高等理工研究院 | Portable indentation method mechanical properties is at active service tester |
| US20210318217A1 (en) * | 2020-04-10 | 2021-10-14 | Xiangtan University | Micro-nano indentation testing device and method |
-
2022
- 2022-03-15 CN CN202210251718.2A patent/CN114838693B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007139592A (en) * | 2005-11-18 | 2007-06-07 | Saitama Prefecture | Instrument of measuring ultramicro hardness or the like and measuring method |
| JP2011013033A (en) * | 2009-06-30 | 2011-01-20 | Wd Media Singapore Pte Ltd | Nano indentation test method and apparatus of the same |
| KR20110057475A (en) * | 2009-11-24 | 2011-06-01 | (주)프론틱스 | Apparatus for indentation test involving micom and evaluating method of residual stress using the same |
| CN102288501A (en) * | 2011-07-25 | 2011-12-21 | 吉林大学 | Precise nanoindentation test device |
| CN106404574A (en) * | 2016-10-11 | 2017-02-15 | 吉林大学 | High-temperature micro-nano press mark test device and method in vacuum environment |
| CN107271261A (en) * | 2017-06-22 | 2017-10-20 | 中国船舶重工集团公司第七二五研究所 | A kind of servicing unit of fastener tension test in kind and the method tested with it |
| CN109540663A (en) * | 2018-10-18 | 2019-03-29 | 吉林大学 | Modification method of the concora crush head verticality to impression test mechanical parameters |
| CN211652407U (en) * | 2019-10-14 | 2020-10-09 | 东莞材料基因高等理工研究院 | Portable indentation method mechanical properties is at active service tester |
| US20210318217A1 (en) * | 2020-04-10 | 2021-10-14 | Xiangtan University | Micro-nano indentation testing device and method |
Non-Patent Citations (1)
| Title |
|---|
| 薛河;李萌;李富强;侯鹏飞;: "基于压入试验的材料硬化指数及弹性模量计算方法", 中国测试, no. 03 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114838693B (en) | 2023-09-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108204876B (en) | Device and method for detecting pretightening force in real time in bolt assembly process | |
| CN105628610A (en) | Integration equipment and detection method for evaluating coating bonding strength based on interface fracture toughness | |
| CN106124313B (en) | Concrete and similar material are by the test device for depressing comprehensive deformation performance | |
| CN107167273B (en) | High-strength bolt connecting node plate compaction degree detection method based on ultrasonic echo | |
| CN109283041B (en) | Experimental device and experimental method for measuring ultimate contact stress of connected piece in bolt node | |
| CN110595889B (en) | Method for testing compressive yield strength of material | |
| CN108844824B (en) | Known material residual stress measuring method based on conical pressure head | |
| CN111077030A (en) | Device and method for testing dynamic mechanical properties of concrete under high strain rate | |
| CN110940735A (en) | Strain clamp and ultrasonic detection method for crimping quality of strain clamp and steel-cored aluminum strand | |
| CN114136780A (en) | Marine stud welding joint tensile test device and method | |
| CN114838693A (en) | Connecting device for measuring indentation depth by using displacement meter and using method | |
| CN117825191A (en) | Buckling fatigue test device for metal/nonmetal sheet | |
| CN215725512U (en) | High-precision gauge | |
| CN110967474A (en) | Building strength detection method | |
| CN113551824A (en) | Bolt connection interface pressure detection method and device based on ultrasonic reflection coefficient | |
| CN210108574U (en) | Four-pressure head assembly suitable for measuring non-isometric residual stress | |
| CN113390372A (en) | Fluorine chemical plant non-invasive corrosion on-line detection equipment | |
| CN114526663A (en) | Straightness detection tool, detection method and detection method | |
| CN112097964A (en) | Device and method for detecting prestress of threaded steel bar based on magnetic flux test | |
| CN114878041B (en) | Method for measuring stress of in-service oil and gas pipeline by using bidirectional ultrasonic probe | |
| CN213933032U (en) | Device for measuring rigidity of bolt-to-connector | |
| CN217211938U (en) | Tool for measuring elongation of offshore wind power floating body mooring rope | |
| CN111426630B (en) | Measuring device and method for measuring coating interface bonding strength of sample | |
| CN219084837U (en) | Acoustic emission sensor positioning device | |
| CN211783278U (en) | Workpiece bending deformation meter measuring and checking tool |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |