CN114112650B - Experimental device for compression performance test and application method thereof - Google Patents

Experimental device for compression performance test and application method thereof Download PDF

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Publication number
CN114112650B
CN114112650B CN202111645017.9A CN202111645017A CN114112650B CN 114112650 B CN114112650 B CN 114112650B CN 202111645017 A CN202111645017 A CN 202111645017A CN 114112650 B CN114112650 B CN 114112650B
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China
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clamping block
clamping
assembly
compression
limiting
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CN114112650A (en
Inventor
刘晓东
周锦地
张莉
果立成
逯浩
李志兴
李忠刚
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Harbin Institute of Technology
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Harbin Institute of Technology
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/02—Details
    • G01N3/04—Chucks
    • 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
    • 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
    • G01N3/068—Special adaptations of indicating or recording means with optical 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
    • G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
    • 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
    • G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
    • G01N2203/0073—Fatigue
    • 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
    • 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
    • G01N2203/04—Chucks, fixtures, jaws, holders or anvils
    • G01N2203/0423—Chucks, fixtures, jaws, holders or anvils using screws
    • 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
    • G01N2203/0641—Indicating or recording means; Sensing means using optical, X-ray, ultraviolet, infrared or similar detectors
    • G01N2203/0647—Image analysis

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  • 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)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)

Abstract

The invention relates to the technical field of compression performance testing, in particular to an experimental device for compression performance testing and a using method thereof. The experimental device comprises a first compression assembly, a first clamping assembly, a second clamping assembly and a second compression assembly which are sequentially arranged along the height direction of a material to be tested; the first compression assembly comprises a first compression platform and a first adjusting assembly, and the first clamping assembly comprises a first clamping block, a second clamping block and a first limiting assembly; the second compression assembly comprises a second compression platform and a second adjusting assembly, and the second clamping assembly comprises a third clamping block, a fourth clamping block and a second limiting assembly; the first adjusting component and the second adjusting component are used for adjusting the position of the material to be measured in the thickness direction, and the first limiting component and the second limiting component are used for adjusting the position of the material to be measured in the width direction. The experimental device provided by the invention can ensure that the material to be tested is positioned at the centering position.

Description

Experimental device for compression performance test and application method thereof
Technical Field
The invention relates to the technical field of compression performance testing, in particular to an experimental device for compression performance testing and a using method thereof.
Background
A compression tester is a device for testing the compression properties of a material, by which the compression static and fatigue properties of the material can be obtained and the full field strain of the material monitored by DIC (Digital Image Correlation ) techniques. Before the compression performance test, the material to be tested needs to be processed into axisymmetric geometric bodies so as to prevent inaccurate test results caused by bending of the material to be tested in the compression process.
In the related art, when the material to be tested is compressed, it is difficult to ensure that the material to be tested is in a centered position (i.e., the center symmetry axis of the material to be tested and the direction of the center pressure of the compression performance tester are located on the same line).
Therefore, there is an urgent need to provide an experimental apparatus for compression performance test and a method for using the same to solve the above problems.
Disclosure of Invention
The embodiment of the invention provides an experimental device for testing compression performance and a use method thereof, which can ensure that a material to be tested is positioned at a centering position.
In a first aspect, the invention provides an experimental device for testing compression performance, which comprises a first compression assembly, a first clamping assembly, a second clamping assembly and a second compression assembly, wherein the first compression assembly, the first clamping assembly, the second clamping assembly and the second compression assembly are sequentially arranged along the height direction of a material to be tested, and the first compression assembly and the second compression assembly are connected with a compression tester;
the first compression assembly comprises a first compression platform and a first adjusting assembly, the first clamping assembly comprises a first clamping block, a second clamping block and a first limiting assembly, the first clamping block and the second clamping block are fixed with the first compression platform through the first adjusting assembly, and the first clamping block and the second clamping block are used for clamping a part of a material to be tested;
the second compression assembly comprises a second compression platform and a second adjusting assembly, the second clamping assembly comprises a third clamping block, a fourth clamping block and a second limiting assembly, the third clamping block and the fourth clamping block are fixed with the second compression platform through the second adjusting assembly, and the third clamping block and the fourth clamping block are used for clamping another part of the material to be tested;
the first adjusting component and the second adjusting component are used for adjusting the position of the material to be measured in the thickness direction, and the first limiting component and the second limiting component are used for adjusting the position of the material to be measured in the width direction.
Preferably, the first clamping assembly and the second clamping assembly are connected through a linear bearing and a guide rail, and the linear bearing and the guide rail are used for enabling the first clamping assembly and/or the second clamping assembly to slide along the height direction of the material to be tested.
Preferably, the first clamping block and the second clamping block are both provided with two linear bearings, and the third clamping block and the fourth clamping block are both provided with two guide rails;
the two linear bearings arranged on the first clamping block are located at two ends of the material to be tested in the width direction, and the two linear bearings arranged on the second clamping block are located at two ends of the material to be tested in the width direction.
Preferably, the first compression platform is provided with a first long pulling hole, the first long pulling hole extends along the thickness direction of the material to be tested, the first adjusting component comprises a first fixing screw, the first clamping block and the second clamping block are both provided with a first threaded hole, and the first fixing screw passes through the first long pulling hole and then is matched with the first threaded hole so that the first clamping block and the second clamping block are fixed on the first compression platform;
the second compression platform is provided with a second long pulling hole, the second long pulling hole extends along the thickness direction of the material to be tested, the second adjusting component comprises a second fixing screw, the first clamping block and the second clamping block are both provided with second threaded holes, and the second fixing screw penetrates through the second long pulling hole and then is matched with the second threaded holes, so that the third clamping block and the fourth clamping block are fixed on the second compression platform;
and adjusting the position of the material to be measured in the thickness direction by adjusting the position of the first fixing screw on the first long pulling hole and the position of the second fixing screw on the second long pulling hole.
Preferably, the first adjusting assembly further comprises a first limit screw for defining a position of the first fixing screw in the first long pulling hole;
the second adjusting assembly further comprises a second limiting screw, wherein the second limiting screw is used for limiting the position of the second fixing screw in the second long pulling hole.
Preferably, the first limiting component comprises a first L-shaped limiting strip and two third fixing screws, the first L-shaped limiting strip comprises a first fixing part and a first limiting part, the first fixing part is provided with a first width limiting pull hole, the first width limiting pull hole extends along the width direction of the material to be tested, the first clamping block or the second clamping block is provided with a third threaded hole, and the third fixing screws pass through the first width limiting pull hole and then are matched with the third threaded hole, so that the first L-shaped limiting strip is fixed on the first clamping block or the second clamping block, and the first limiting part is used for limiting the position of the material to be tested in the width direction;
the second limiting assembly comprises a second L-shaped limiting strip and two fourth fixing screws, the second L-shaped limiting strip comprises a second fixing portion and a second limiting portion, the second fixing portion is provided with a second width limiting pull hole, the second width limiting pull hole extends along the width direction of the material to be tested, the third clamping block or the fourth clamping block is provided with a fourth threaded hole, and the fourth fixing screws penetrate through the second width limiting pull hole and then are matched with the fourth threaded hole, so that the second L-shaped limiting strip is fixed on the third clamping block or the fourth clamping block, and the second limiting portion is used for limiting the position of the material to be tested in the width direction.
Preferably, the first clamping assembly further comprises a first clamping screw, the first clamping block and the second clamping block are provided with first clamping threaded holes, and the first clamping block and the second clamping block clamp a part of the material to be tested through the matching of the first clamping screw and the first clamping threaded holes;
the second clamping assembly further comprises a second clamping screw, the third clamping block and the fourth clamping block are provided with second clamping threaded holes, and the first clamping block and the second clamping block clamp the other part of the material to be tested through the cooperation of the second clamping screw and the second clamping threaded holes.
Preferably, the first compression platform comprises four first long pull holes, the two surfaces of the first compression platform, which are provided with the first long pull holes, are marked with scales, the second compression platform comprises four second long pull holes, and the two surfaces of the second compression platform, which are provided with the second long pull holes, are marked with scales;
the first clamping assembly is provided with a scale mark on the surface of the first L-shaped limiting strip, and the second clamping assembly is provided with a scale mark on the surface of the second L-shaped limiting strip.
Preferably, the first compression assembly further comprises a first clamping rod, the first compression platform is connected with the compression test machine through the first clamping rod, and the first clamping rod is collinear with the central symmetry axis of the material to be tested;
the second compression assembly further comprises a second clamping rod, the second compression platform is connected with the compression test machine through the second clamping rod, and the second clamping rod is collinear with the central symmetry axis of the material to be tested.
In a second aspect, the present invention also provides a method for using the experimental apparatus for compression performance test, where the experimental apparatus is any one of the first aspect, and the method includes the following steps:
clamping a portion of a material to be tested with the first clamping block and the second clamping block;
clamping another part of the material to be tested by using the third clamping block and the fourth clamping block;
and the first limiting component and the second limiting component are used for adjusting the position of the material to be measured in the width direction, so that the material to be measured is positioned at a centering position.
Compared with the prior art, the invention has at least the following beneficial effects:
in the invention, the first compression assembly, the first clamping assembly, the second clamping assembly and the second compression assembly are arranged along the height direction of the material to be measured, the first clamping assembly and the second clamping assembly clamp the material to be measured, then the material to be measured is adjusted to a centering position along the thickness direction through the first adjusting assembly and the second adjusting assembly, and then the material to be measured is adjusted to the centering position along the width direction through the first limiting assembly and the second limiting assembly, so that the centering position adjustment of the material to be measured is completed.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of an experimental apparatus for compression performance testing according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a first compression assembly according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a second compression assembly according to an embodiment of the present invention;
FIG. 4 is a schematic structural view of a first clamping assembly according to an embodiment of the present invention;
FIG. 5 is a schematic view of a second clamping assembly according to an embodiment of the present invention;
FIG. 6 is a schematic structural view of a first limiting component according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a second limiting component according to an embodiment of the present invention. In the figure:
1-a first compression assembly;
11-a first compression stage;
111-a first long broaching hole;
12-a first adjustment assembly;
121-a first set screw;
122. a first limit screw;
13-a first clamping bar;
2-a second compression assembly;
21-a second compression stage;
211-second long broaching;
22-a second adjustment assembly;
221-a second set screw;
222-a second limit screw;
23-a second clamping bar;
3-a first clamping assembly;
31-a first clamping block;
32-a second clamping block;
33-a first stop assembly;
331-a first L-shaped stop bar;
331 a-a first fixing portion;
331 b-a first limited width draw hole;
331 c-a first limit part;
332. a third set screw;
34-linear bearings;
35-a first threaded hole;
36-a third threaded hole;
37-a first clamping screw;
38-a first clamping threaded hole;
4-a second clamping assembly;
41-a third clamping block;
42-fourth clamping blocks;
43-a second stop assembly;
431-a second L-shaped limit bar;
431 a-a second securing portion;
431 b-a second width-limiting broaching;
431 c-a second limit;
432-fourth set screw;
44-a guide rail;
45-a second threaded hole;
46-fourth threaded holes;
47-a second clamping screw;
48-a second clamping threaded hole;
5-the material to be measured.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments, and all other embodiments obtained by those skilled in the art without making any inventive effort based on the embodiments of the present invention are within the scope of protection of the present invention.
In the description of embodiments of the present invention, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying any relative importance unless explicitly specified or limited otherwise; the term "plurality" means two or more, unless specified or indicated otherwise; the terms "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, integrally connected, or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the description of the present specification, it should be understood that the terms "upper", "lower", and the like used in the embodiments of the present invention are described in terms of the angles shown in the drawings, and should not be construed as limiting the embodiments of the present invention. In the context of this document, it will also be understood that when an element is referred to as being "on" or "under" another element, it can be directly on the other element or be indirectly on the other element through intervening elements.
As shown in fig. 1, the invention provides an experimental device for testing compression performance, which comprises a first compression assembly 1, a first clamping assembly 3, a second clamping assembly 4 and a second compression assembly 2 which are sequentially arranged along the height direction of a material 5 to be tested, wherein the first compression assembly 1 and the second compression assembly 2 are connected with a compression tester;
the first compression assembly 1 comprises a first compression platform 11 and a first adjusting assembly 12, the first clamping assembly 3 comprises a first clamping block 31, a second clamping block 32 and a first limiting assembly 33, the first clamping block 31 and the second clamping block 32 are fixed with the first compression platform 11 through the first adjusting assembly 12, and the first clamping block 31 and the second clamping block 32 are used for clamping a part of the material 5 to be tested;
the second compression assembly 2 comprises a second compression platform 21 and a second adjusting assembly 22, the second clamping assembly 4 comprises a third clamping block 41, a fourth clamping block 42 and a second limiting assembly 43, the third clamping block 41 and the fourth clamping block 42 are fixed with the second compression platform 21 through the second adjusting assembly 22, and the third clamping block 41 and the fourth clamping block 42 are used for clamping another part of the material 5 to be tested;
the first adjusting component 12 and the second adjusting component 22 are used for adjusting the position of the material 5 to be measured in the thickness direction, and the first limiting component 33 and the second limiting component 43 are used for adjusting the position of the material 5 to be measured in the width direction.
In the invention, the first compression assembly 1, the first clamping assembly 3, the second clamping assembly 4 and the second compression assembly 2 are arranged along the height direction of the material 5 to be measured, the first clamping assembly 3 and the second clamping assembly clamp the material 5 to be measured, then the material 5 to be measured is adjusted to a centering position along the thickness direction through the first adjusting assembly 12 and the second adjusting assembly 22, and then the material 5 to be measured is adjusted to the centering position along the width direction through the first limiting assembly 33 and the second limiting assembly 43, so that the centering position adjustment of the material 5 to be measured is completed.
It should be noted that, the first adjusting component 12 can adjust the distance between the first clamping block 31 and the second clamping block 32, the second adjusting component 22 can adjust the distance between the third clamping block 41 and the fourth clamping block 42, and the experimental device has the effect of clamping the materials 5 to be tested with different thicknesses by adjusting the distance between the clamping blocks; the first spacing subassembly 33 and the spacing subassembly 43 of second can follow width direction adjustment, through the distance between the spacing subassembly 33 of adjustment first and the spacing subassembly 43 of second, make experimental apparatus possess the effect of the different width of centre gripping material 5 that awaits measuring.
In addition, the first clamping block and the second clamping block clamp one part of the material to be tested, and the third clamping block and the fourth clamping block clamp the other part of the material to be tested, so that the material to be tested can be prevented from buckling. Meanwhile, the material to be tested is clamped in the experimental device, so that the fatigue performance of the material to be tested can be tested.
According to some preferred embodiments, the first clamping assembly 3 and the second clamping assembly 4 are connected by a linear bearing 34 and a guide rail 44, and the linear bearing 34 and the guide rail 44 are used for sliding the first clamping assembly 3 and/or the second clamping assembly 4 along the height direction of the material 5 to be tested.
In the invention, the first clamping assembly 3 and the second clamping assembly 4 are connected through the linear bearing 34 and the guide rail 44, the linear bearing 34 and the guide rail 44 can slide along the height direction of the material 5 to be tested, and the experimental device can fix the materials 5 to be tested with different heights through the sliding guide rail 44. In addition, the directions of the linear bearings 34 and the guide rails 44 are consistent with the height direction of the material 5 to be tested, and the arrangement is such that the material 5 to be tested can be prevented from being stressed beyond the height direction when the material 5 to be tested is subjected to compression performance test, and further the material 5 to be tested is ensured to be subjected to stress deformation along the height direction.
According to some preferred embodiments, the first clamping block 31 and the second clamping block 32 are each provided with two linear bearings 34, and the third clamping block 41 and the fourth clamping block 42 are each provided with two guide rails 44;
two linear bearings 34 provided in the first clamp block 31 are located at both ends in the width direction of the material 5 to be measured, and two linear bearings 34 provided in the second clamp block 32 are located at both ends in the width direction of the material 5 to be measured.
In the present invention, the sliding groups composed of the linear bearings 34 and the guide rails 44 are disposed at both ends of the width direction of the material 5 to be tested, so that the surface of the material 5 to be tested, which is composed of the length and the width, is not blocked by the linear bearings 34 and the guide rails 44, and when the material 5 to be tested is fixed by an experimental apparatus and subjected to a compression test, the full-field strain of the material 5 to be tested can be monitored by DIC (Digital Image Correlation, digital image correlation method) technology. In addition, the linear bearings 34 and the guide rails 44 also prevent buckling of the material 5 under test to meet the compression test requirements.
According to some preferred embodiments, as shown in fig. 2, the first compression platform 11 is provided with a first long drawing hole 111, the first long drawing hole 111 extends along the thickness direction of the material 5 to be measured, the first adjusting assembly 12 includes a first fixing screw 121, each of the first clamping block 31 and the second clamping block 32 is provided with a first threaded hole 35, and the first fixing screw 121 passes through the first long drawing hole 111 and then cooperates with the first threaded hole 35 so that the first clamping block 31 and the second clamping block 32 are fixed on the first compression platform 11;
as shown in fig. 3, the second compression platform 21 is provided with a second long drawing hole 211, the second long drawing hole 211 extends along the thickness direction of the material 5 to be measured, the second adjusting component 22 comprises a second fixing screw 221, the first clamping block 31 and the second clamping block 32 are both provided with a second threaded hole 45, and the second fixing screw 221 passes through the second long drawing hole 211 and then is matched with the second threaded hole 45, so that the third clamping block 41 and the fourth clamping block 42 are fixed on the second compression platform 21;
the position of the material 5 to be measured in the thickness direction is adjusted by adjusting the position of the first set screw 121 on the first long drawing hole 111 and the position of the second set screw 221 on the second long drawing hole 211.
In the present invention, the first clamping block 31 and the second clamping block 32 are respectively fixed on the first compression platform 11 by the first fixing screw 121 penetrating through the first long pulling hole 111, because the first long pulling hole 111 extends along the thickness direction of the material 5 to be tested, the first clamping block 31 and the second clamping block 32 can adjust positions along the thickness direction through the first long pulling hole 111, and further the first clamping block 31 and the second clamping block 32 can adjust the clamped material 5 to be tested to the centering position along the thickness direction through adjustment, and in addition, the experimental device can clamp the material 5 to be tested with different thicknesses through adjusting the distance between the first clamping block 31 and the second clamping block 32 along the thickness direction.
Similarly, the second clamping block 32 and the third clamping block 41 are respectively fixed on the second compression platform 21 by the second fixing screw 221 penetrating the second long pulling hole 211, because the second long pulling hole 211 extends along the thickness direction of the material 5 to be tested, the third clamping block 41 and the fourth clamping block 42 can adjust positions along the thickness direction through the second long pulling hole 211, and further the third clamping block 41 and the fourth clamping block 42 can adjust the clamped material 5 to be tested to the centering positions along the thickness direction through adjustment, and in addition, the experimental device can clamp the material 5 to be tested with different thicknesses through adjusting the distance between the third clamping block 41 and the fourth clamping block 42 along the thickness direction.
According to some preferred embodiments, the first adjustment assembly 12 further comprises a first limit screw 122, the first limit screw 122 being used to define the position of the first set screw 121 in the first elongated aperture 111;
the second adjusting assembly 22 further includes a second limit screw 222, the second limit screw 222 being configured to define a position of the second fixing screw 221 in the second elongated hole 211.
In the present invention, the ends of the first limiting screw 122 and the second limiting screw 222 are abutted against the first fixing screw 121 and the second fixing screw 221, so as to avoid the first fixing screw 121 and/or the second fixing screw 221 sliding in the first long pulling hole 111 and/or the second long pulling hole 211 due to excessive pressure when the material 5 to be tested is tested for pressure, thereby causing the material 5 to be tested to deviate from the centered position.
According to some preferred embodiments, as shown in fig. 4 to 7, the first limiting component 33 includes a first L-shaped limiting bar 331 and two third fixing screws 332, the first L-shaped limiting bar 331 includes a first fixing portion 331a and a first limiting portion 331c, the first fixing portion 331a is provided with a first width-limiting draw hole 331b, the first width-limiting draw hole 331b extends along the width direction of the material 5 to be tested, the first clamping block 31 or the second clamping block 32 is provided with a third threaded hole 36, and the third fixing screws 332 pass through the first width-limiting draw hole 331b and then cooperate with the third threaded holes 36, so that the first L-shaped limiting bar 331 is fixed on the first clamping block 31 or the second clamping block 32, and the first limiting portion 331c is used for limiting the position of the material 5 to be tested in the width direction;
the second limiting component 43 includes a second L-shaped limiting bar 431 and two fourth fixing screws 432, the second L-shaped limiting bar 431 includes a second fixing portion 431a and a second limiting portion 431c, the second fixing portion 431a is provided with a second width-limiting hole 431b, the second width-limiting hole 431b extends along the width direction of the material 5 to be tested, the third clamping block 41 or the fourth clamping block 42 is provided with a fourth threaded hole 46, and the fourth fixing screws 432 pass through the second width-limiting hole 431b and then cooperate with the fourth threaded hole 46, so that the second L-shaped limiting bar 431 is fixed on the third clamping block 41 or the fourth clamping block 42, and the second limiting portion 431c is used for limiting the position of the material 5 to be tested in the width direction.
In the present invention, a line formed by connecting two third fixing screws 332 is parallel to the width direction of the material 5 to be measured, the third fixing screws 332 penetrate through the first width limiting pull holes 331b to fix the first L-shaped limiting strips 331 on the first clamping blocks 31 or the second clamping blocks 32, and the arrangement is such that the first L-shaped limiting strips 331 fixed by the third fixing screws 332 can adjust positions along the width direction; the straight line formed by connecting the two fourth fixing screws 432 is parallel to the width direction of the material 5 to be measured, the fourth fixing screws 432 penetrate through the second width limiting pull holes 431b to fix the second L-shaped limiting strips 431 on the third clamping block 41 or the fourth clamping block 42, and the arrangement is such that the second L-shaped limiting strips 431 fixed by the fourth fixing screws 432 can adjust positions along the width direction. The first limiting portion 331c and the second limiting portion 431c clamp the material 5 to be tested in the width direction, the first L-shaped limiting bar 331 and the second L-shaped limiting bar 431 are adjusted through the first limiting width draw hole 331b and the second limiting width draw hole 431b, and the positions of the first limiting portion 331c and the second limiting portion 431c can be adjusted in the width direction of the material 5 to be tested, so that the material 5 to be tested is adjusted to a centering position in the width direction, and in addition, the experimental device can be enabled to fix the material 5 to be tested in different widths by adjusting the distance between the first limiting portion 331c and the second limiting portion 431 c.
According to some preferred embodiments, the first clamping assembly 3 further comprises a first clamping screw 37, the first clamping block 31 and the second clamping block 32 are provided with a first clamping threaded hole 38, and the first clamping block 31 and the second clamping block 32 clamp a portion of the material 5 to be tested by the cooperation of the first clamping screw 37 and the first clamping threaded hole 38;
the second clamping assembly 4 further comprises a second clamping screw 47, the third clamping block 41 and the fourth clamping block 42 are provided with a second clamping threaded hole 48, and the first clamping block 31 and the second clamping block 32 clamp another part of the material 5 to be tested through the cooperation of the second clamping screw 47 and the second clamping threaded hole 48.
In the invention, a first clamping screw 37 passes through a first clamping block 31 to fix a second clamping block 32 with the first clamping block, and the first clamping block 31 and the second clamping block 32 clamp a material 5 to be tested by tightening the first clamping screw 37; the second clamping screw 47 passes through the third clamping block 41 to fix the fourth clamping block 42 together with the third clamping block, and the third clamping block 41 and the fourth clamping block 42 clamp the material 5 to be tested by tightening the second clamping screw 47.
According to some preferred embodiments, the first compression stage 11 comprises four first long pull holes 111, the first compression stage 11 is provided with graduations on both sides of the first long pull holes 111, the second compression stage 21 comprises four second long pull holes 211, and the second compression stage 21 is provided with graduations on both sides of the second long pull holes 211;
the first clamping assembly 3 is provided with scales on the surface of the first L-shaped limiting bar 331, and the second clamping assembly 4 is provided with scales on the surface of the second L-shaped limiting bar 431.
In the invention, the corresponding positions of the first compression platform 11 and the second compression platform 21 are marked with scales, so that the adjustment of the first clamping block 31, the second clamping block 32, the third clamping block 41 and the fourth clamping block 42 along the thickness direction is more accurate, for example, the thickness centering positions of the first compression platform 11 and the second compression platform 21 are marked with 0 scales, the thickness value of the material 5 to be measured is measured, the first clamping block 31 and the second clamping block 32 are moved by 1/2 of the thickness value along the thickness direction towards the two sides of the 0 scales according to the thickness value of the material 5 to be measured, and the third clamping block 41 and the fourth clamping block 42 are moved by 1/2 of the thickness value along the thickness direction towards the two sides of the 0 scales, so that the adjustment of the thickness direction of the material 5 to be measured is more accurate.
In the invention, the surface of the first clamping component 3 provided with the first L-shaped limit bar 331 is marked with scales, the surface of the second clamping component 4 provided with the second L-shaped limit bar 431 is marked with scales, and the arrangement is such that the adjustment of the first L-shaped limit bar 331 and the second L-shaped limit bar 431 along the width direction is more accurate, for example, the width centering position of the first clamping component 3 and the second clamping component 4 is marked with 0 scale, the width value of the material 5 to be measured is measured, and then the first L-shaped limit bar 331 and the second L-shaped limit bar 431 are moved by 1/2 of the width value along the width direction towards the two sides of the 0 scale according to the width value of the material 5 to be measured, so that the adjustment of the width direction of the material 5 to be measured is more accurate.
According to some preferred embodiments, the first compression assembly 1 further comprises a first clamping rod 13, the first compression platform 11 is connected to the compression tester by the first clamping rod 13, the first clamping rod 13 is collinear with the central symmetry axis of the material 5 to be tested;
the second compression assembly 2 further comprises a second clamping rod 23, the second compression platform 21 is connected with the compression tester through the second clamping rod 23, and the second clamping rod 23 is collinear with the central symmetry axis of the material 5 to be tested.
In the present invention, the first clamping lever 13 and the second clamping lever 23 are collinear with the central symmetry axis of the material 5 to be tested, and are arranged such that the points of application of forces applied to the first compression stage 11 and the second compression stage 21 by the compression test machine through the first clamping lever 13 and the second clamping lever 23 are on the central symmetry axis.
According to some more preferred embodiments, a table-like structure is provided at the junction of the first clamping bar 13 and the first compression stage 11, and at the junction of the second clamping bar 23 and the second compression stage 21, for preventing slipping of the junction due to excessive pressure.
The invention also provides a using method of the experimental device for testing the compression performance, wherein the experimental device is the experimental device, and the using method comprises the following steps:
clamping a portion of the material 5 to be tested with the first clamping block 31 and the second clamping block 32;
clamping another part of the material 5 to be tested by using the third clamping block 41 and the fourth clamping block 42;
the first adjusting component 12 and the second adjusting component 22 are used for adjusting the position of the material 5 to be measured in the thickness direction, and the first limiting component 33 and the second limiting component 43 are used for adjusting the position of the material 5 to be measured in the width direction, so that the material 5 to be measured is in a centering position.
In the invention, after the material 5 to be tested is adjusted to the centering position, the material 5 to be tested is required to be preloaded under load before the compression test, a certain pressure is applied to an experimental device through a compression tester, so that the first compression platform 11 and the second compression platform 21 are fully contacted with the material 5 to be tested at the centering position, and if the material 5 to be tested is not preloaded under load, the pressure and deformation data at the beginning of the pressure test are not true due to insufficient contact.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (9)

1. The experimental device for testing the compression performance is characterized by comprising a first compression assembly (1), a first clamping assembly (3), a second clamping assembly (4) and a second compression assembly (2) which are sequentially arranged along the height direction of a material (5) to be tested, wherein the first compression assembly (1) and the second compression assembly (2) are connected with a compression tester;
the first compression assembly (1) comprises a first compression platform (11) and a first adjusting assembly (12), the first clamping assembly (3) comprises a first clamping block (31), a second clamping block (32) and a first limiting assembly (33), the first clamping block (31) and the second clamping block (32) are fixed with the first compression platform (11) through the first adjusting assembly (12), and the first clamping block (31) and the second clamping block (32) are used for clamping a part of a material (5) to be tested;
the second compression assembly (2) comprises a second compression platform (21) and a second adjusting assembly (22), the second clamping assembly (4) comprises a third clamping block (41), a fourth clamping block (42) and a second limiting assembly (43), the third clamping block (41) and the fourth clamping block (42) are fixed with the second compression platform (21) through the second adjusting assembly (22), and the third clamping block (41) and the fourth clamping block (42) are used for clamping another part of the material (5) to be tested;
the first adjusting component (12) and the second adjusting component (22) are used for adjusting the position of the material (5) to be measured in the thickness direction, and the first limiting component (33) and the second limiting component (43) are used for adjusting the position of the material (5) to be measured in the width direction;
the first compression platform (11) is provided with a first long pulling hole (111), the first long pulling hole (111) extends along the thickness direction of the material (5) to be detected, the first adjusting component (12) comprises a first fixing screw (121), the first clamping block (31) and the second clamping block (32) are both provided with a first threaded hole (112), and the first fixing screw (121) penetrates through the first long pulling hole (111) and then is matched with the first threaded hole (112), so that the first clamping block (31) and the second clamping block (32) are fixed on the first compression platform (11);
the second compression platform (21) is provided with a second long pulling hole (211), the second long pulling hole (211) extends along the thickness direction of the material (5) to be tested, the second adjusting component (22) comprises a second fixing screw (221), the first clamping block (31) and the second clamping block (32) are both provided with a second threaded hole (45), and the second fixing screw (221) passes through the second long pulling hole (211) and then is matched with the second threaded hole (45) so that the third clamping block (41) and the fourth clamping block (42) are fixed on the second compression platform (21);
the position of the material (5) to be measured in the thickness direction is adjusted by adjusting the position of the first fixing screw (121) on the first long pulling hole (111) and the position of the second fixing screw (221) on the second long pulling hole (211).
2. The experimental device according to claim 1, characterized in that the first clamping assembly (3) and the second clamping assembly (4) are connected through a linear bearing (34) and a guide rail (44), and the linear bearing (34) and the guide rail (44) are used for enabling the first clamping assembly (3) and/or the second clamping assembly (4) to slide along the height direction of the material (5) to be tested.
3. The experimental device according to claim 2, characterized in that the first clamping block (31) and the second clamping block (32) are each provided with two of the linear bearings (34), and the third clamping block (41) and the fourth clamping block (42) are each provided with two of the guide rails (44);
the two linear bearings (34) arranged on the first clamping block (31) are positioned at two ends of the material (5) to be tested in the width direction, and the two linear bearings (34) arranged on the second clamping block (32) are positioned at two ends of the material (5) to be tested in the width direction.
4. The experimental device according to claim 1, characterized in that the first adjustment assembly (12) further comprises a first limit screw (122), the first limit screw (122) being used to define the position of the first set screw (121) in the first elongated pull hole (111);
the second adjusting assembly (22) further comprises a second limit screw (222), wherein the second limit screw (222) is used for limiting the position of the second fixing screw (221) in the second long pulling hole (211).
5. The experimental device according to claim 1, wherein the first limiting component (33) comprises a first L-shaped limiting strip (331) and two third fixing screws (332), the first L-shaped limiting strip (331) comprises a first fixing portion (331 a) and a first limiting portion (331 c), the first fixing portion (331 a) is provided with a first limiting width pulling hole (331 b), the first limiting width pulling hole (331 b) extends along the width direction of the material to be tested (5), the first clamping block (31) or the second clamping block (32) is provided with a third threaded hole (36), and the third fixing screws (332) are matched with the third threaded hole (36) after penetrating through the first limiting width pulling hole (331 b), so that the first L-shaped limiting strip (331) is fixed on the first clamping block (31) or the second clamping block (32), and the first limiting portion (331 c) is used for limiting the position of the material to be tested (5) in the width direction;
the second limiting component (43) comprises a second L-shaped limiting strip (431) and two fourth fixing screws (432), the second L-shaped limiting strip (431) comprises a second fixing portion (431 a) and a second limiting portion (431 c), the second fixing portion (431 a) is provided with a second limiting width pulling hole (431 b), the second limiting width pulling hole (431 b) extends along the width direction of the material to be tested (5), the third clamping block (41) or the fourth clamping block (42) is provided with a fourth threaded hole (46), and the fourth fixing screws (432) are matched with the fourth threaded hole (46) after penetrating through the second limiting width pulling hole (431 b), so that the second L-shaped limiting strip (431) is fixed on the third clamping block (41) or the fourth clamping block (42), and the second limiting portion (431 c) is used for limiting the position of the material to be tested (5) in the width direction.
6. The experimental device according to claim 1, characterized in that the first clamping assembly (3) further comprises a first clamping screw (37), the first clamping block (31) and the second clamping block (32) are provided with a first clamping threaded hole (38), and the first clamping block (31) and the second clamping block (32) clamp a part of the material (5) to be tested by the first clamping screw (37) and the first clamping threaded hole (38) being matched;
the second clamping assembly (4) further comprises a second clamping screw (47), the third clamping block (41) and the fourth clamping block (42) are provided with a second clamping threaded hole (48), and the first clamping block (31) and the second clamping block (32) clamp the other part of the material (5) to be tested through the matching of the second clamping screw (47) and the second clamping threaded hole (48).
7. The experimental device according to any one of claims 1-6, characterized in that the first compression stage (11) comprises four first long draw holes (111), two faces of the first compression stage (11) where the first long draw holes (111) are provided are marked with scales, the second compression stage (21) comprises four second long draw holes (211), two faces of the second compression stage (21) where the second long draw holes (211) are provided are marked with scales;
the surface of the first clamping component (3) provided with the first L-shaped limiting strip (331) is marked with scales, and the surface of the second clamping component (4) provided with the second L-shaped limiting strip (431) is marked with scales.
8. The experimental device according to claim 1, characterized in that the first compression assembly (1) further comprises a first clamping rod (13), the first compression platform (11) being connected to the compression tester by means of the first clamping rod (13), the first clamping rod (13) being collinear with the central symmetry axis of the material (5) to be tested;
the second compression assembly (2) further comprises a second clamping rod (23), the second compression platform (21) is connected with the compression test machine through the second clamping rod (23), and the second clamping rod (23) is collinear with the central symmetry axis of the material (5) to be tested.
9. A method of using the test device for compression performance testing, characterized in that the test device is the test device according to any one of claims 1-8, the method of using comprising the steps of:
clamping a portion of the material (5) to be tested with the first clamping block (31) and the second clamping block (32);
clamping another part of the material (5) to be tested by using the third clamping block (41) and the fourth clamping block (42);
the first adjusting component (12) and the second adjusting component (22) are utilized to adjust the position of the material (5) to be measured in the thickness direction, and the first limiting component (33) and the second limiting component (43) are utilized to adjust the position of the material (5) to be measured in the width direction, so that the material (5) to be measured is positioned in the centering position.
CN202111645017.9A 2021-12-29 2021-12-29 Experimental device for compression performance test and application method thereof Active CN114112650B (en)

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