CN112284888B - A kind of sample fixture for Brazilian splitting and using method - Google Patents
A kind of sample fixture for Brazilian splitting and using method Download PDFInfo
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- CN112284888B CN112284888B CN202011080518.2A CN202011080518A CN112284888B CN 112284888 B CN112284888 B CN 112284888B CN 202011080518 A CN202011080518 A CN 202011080518A CN 112284888 B CN112284888 B CN 112284888B
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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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0003—Steady
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0019—Compressive
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/006—Crack, flaws, fracture or rupture
- G01N2203/0067—Fracture or rupture
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/025—Geometry of the test
- G01N2203/0258—Non axial, i.e. the forces not being applied along an axis of symmetry of the specimen
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/026—Specifications of the specimen
- G01N2203/0262—Shape of the specimen
- G01N2203/0266—Cylindrical specimens
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/04—Chucks, fixtures, jaws, holders or anvils
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Abstract
本发明涉及一种用于巴西劈裂的试样夹具，包括：支座、定位圆盘和定位销组件；支座包括底部座台和设置在底部座台上的定位立壁；定位立壁上设有第一定位通槽、第二定位通槽、第三定位槽孔和第四定位槽孔；第一定位通槽、第二定位通槽和第四定位槽孔以第三定位槽孔为圆心布置；定位销组件包括：第一定位销、第二定位销、第三定位销和下垫条；第一定位通槽、第二定位通槽、第三定位槽孔和第四定位槽孔分别用于穿设第一定位销、第二定位销、第三定位销和下垫条；扭转定位圆盘能够控制第一定位销和第二定位销夹紧或松开位于定位立壁另一面的岩石试件。本发明提供的试样夹具小巧精致，仅通过定位圆盘的顺时针逆时针的旋转便可以实施岩石试件的定位。
The invention relates to a sample holder for Brazilian splitting, comprising: a support, a positioning disc and a positioning pin assembly; the support comprises a bottom seat and a positioning vertical wall arranged on the bottom seat; the positioning vertical wall is provided with The first positioning through slot, the second positioning through slot, the third positioning slot hole and the fourth positioning slot hole; the first positioning through slot, the second positioning through slot and the fourth positioning slot hole are arranged with the third positioning slot hole as the center of the circle ; The positioning pin assembly includes: the first positioning pin, the second positioning pin, the third positioning pin and the bottom pad; the first positioning through slot, the second positioning through slot, the third positioning slot hole and the fourth positioning slot hole are respectively used To pass through the first positioning pin, the second positioning pin, the third positioning pin and the bottom pad; twisting the positioning disc can control the first positioning pin and the second positioning pin to clamp or loosen the rock tester located on the other side of the positioning vertical wall. piece. The sample holder provided by the invention is small and exquisite, and the positioning of the rock sample can be implemented only by clockwise and counterclockwise rotation of the positioning disc.
Description
Technical Field
The invention belongs to the technical field of rock mechanical tests, and relates to a sample clamp for Brazilian splitting and a using method thereof.
Background
Rock tensile strength in rock engineering refers to the ultimate stress value when a rock sample is damaged under the action of tensile force. The tensile strength of the rock is an important mechanical property index of the rock and is a control parameter for the design safety and stability analysis of the rock structure. Therefore, the testing of the tensile strength of the rock has great engineering significance.
Generally, there are many test methods for measuring tensile strength of rock, and they are roughly classified into a direct tensile method and an indirect method, but the direct tensile test is limited by clamping conditions and the like so as to avoid stress concentration problems, and thus tensile strength of rock is generally measured by an indirect tensile method. The indirect method has more types, and the splitting method is the most basic test method for measuring the tensile strength of the rock and the most widely applied test method in the geotechnical engineering world at home and abroad at present. The split test is a test in which a radial linear load is applied to a sample of a cylinder (also referred to as a disk) in a diameter direction so as to cause the sample to be diametrically damaged.
The operation method in the highway engineering rock test regulation JTGE41-2005 is to mark two parallel loading baselines along the axial direction through two ends of the diameter of the test piece, and fix two backing strips at two ends of the test piece along the loading baselines. A steel wire with the diameter of 1mm is selected as a filler strip for hard and harder rocks, and a bakelite plate with the ratio of the width to the diameter of a test piece of 0.08-0.1 is selected as the filler strip for weak and softer rocks. The test piece is placed in the center of the pressure bearing plate of the testing machine, the ball seat is adjusted to enable the test piece to be evenly loaded, and the pad strip and the test piece are located on the same loading axis. Continuously and uniformly loading at the speed of 0.3 MPa/s-0.5 MPa/s until the test piece is broken. However, in the above standard, the pad strip is difficult to realize accurate centering on the workbench in the actual operation process, and often one tester needs to hold the rock test piece by hand, and the other tester operates the tester, so that the test error is increased and certain safety risk exists in the experiment process.
The Brazilian split test device has been continuously developed and innovated at home and abroad, and more than ten related test devices exist from 1968 to the present.
Although the auxiliary device (CN103471909A) for testing the tensile strength of the rock by the Brazilian method of Chenshaojie et al of Shandong science and technology university is simple to operate, the stand column and the positioning frame can rub to influence the test precision in the actual compression process of the test piece.
Disclosure of Invention
Technical problem to be solved
In order to solve the above problems of the prior art, the present invention provides a specimen holder for brazilian cleavage and a method of use.
(II) technical scheme
In order to achieve the purpose, the invention adopts the main technical scheme that:
a specimen holder for brazilian splitting, comprising: the positioning device comprises a support, a positioning disc and a positioning pin assembly;
the support comprises a bottom seat stand and a positioning vertical wall arranged on the bottom seat stand;
a first positioning through groove, a second positioning through groove, a third positioning groove hole and a fourth positioning groove hole are formed in the positioning vertical wall;
the first positioning through groove, the second positioning through groove and the fourth positioning groove hole are arranged by taking the third positioning groove hole as a circle center;
the dowel pin assembly includes: the first positioning pin, the second positioning pin, the third positioning pin and the lower filler strip;
the first positioning through groove, the second positioning through groove, the third positioning groove hole and the fourth positioning groove hole are respectively used for penetrating the first positioning pin, the second positioning pin, the third positioning pin and the lower filler strip;
the positioning disc is provided with a first arc-shaped groove, a second arc-shaped groove, a central groove hole and a third arc-shaped groove which are respectively used for arranging the first positioning pin, the second positioning pin, the third positioning pin and the lower filler strip;
and the first positioning pin and the second positioning pin can be controlled to clamp or release the rock test piece on the other surface of the positioning vertical wall by twisting the positioning disc.
Preferably, the positioning vertical wall on the opposite side of the positioning disc is also provided with an upper cushion block;
the upper cushion block is detachably arranged on the positioning vertical wall;
the lower end of the upper cushion block is provided with an upper cushion strip;
the upper padding strip and the upper padding block are in an integrally formed structure or detachably connected.
Preferably, a lower cushion block is further arranged on the bottom seat stand below the positioning vertical wall on the opposite side of the positioning disc;
the lower cushion block is provided with a lower cushion strip groove;
and a lower gasket strip is arranged in the lower gasket strip groove.
Preferably, the upper cushion block and the upper cushion strip are integrated into a whole and are connected with an inner groove in the upper cushion block through a protruding end arranged at the upper part of the positioning vertical wall.
Preferably, the positions of the upper filler strip and the lower filler strip 7 are mutually perpendicular and correspond, and the loading diameter line is on a corresponding bus of the rock test piece in the positioning process.
Preferably, the first positioning through groove and the second positioning through groove are both located on the radius of a circle with the third positioning groove hole as the center.
Preferably, the first positioning through groove, the second positioning through groove, the positioning disc, the inner groove of the upper cushion block, the first positioning pin and the second positioning pin are respectively coated with a lubricant, so that the surfaces of the positioning discs can freely slide and tightly contact with each other in the operation process.
The technical scheme also provides a using method of the specimen clamp for Brazilian splitting, which comprises the following steps:
s1, placing the sample clamp for Brazilian splitting according to the scheme between an upper pressure head and a lower pressure head of the pressure tester;
s2, placing the round rock test piece at the upper end of the lower backing strip, placing the upper cushion block at the protruding end of the support, and enabling the axial direction of the rock test piece to be consistent with the directions of the upper backing strip and the lower backing strip as far as possible;
s3, one hand holds the rock test piece, the other hand rotates the positioning disc anticlockwise, the first positioning pin and the second positioning pin move in the first positioning through groove and the second positioning through groove respectively until the first positioning pin and the second positioning pin contact the rock test piece, at the moment, the accurate positioning of the rock test piece is finished, both hands are loosened, and the rock test piece is kept stable;
s4, starting a test, starting a dynamic pressure testing machine, and enabling the rock test piece to be acted by the upper cushion strip and the lower cushion strip until the rock test piece is split along the diameter line direction of the upper cushion strip and the lower cushion strip;
and S5, finishing the test, and taking out the rock test piece.
(III) advantageous effects
The invention has the beneficial effects that: the invention provides a specimen clamp for Brazilian splitting and a using method thereof, which have the following advantages:
need not to carry out artifical debugging, the small and exquisite exquisiteness of test piece anchor clamps, dismantle simply, the location of implementing the rock test piece that only clockwise anticlockwise rotation through the positioning disc can be convenient, and positioning accuracy is high, and the error is little, can obtain accurate test data.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a front detailed view of the specimen holder of the present invention;
FIG. 3 is a detailed view of the reverse side of the test piece fixture of the present invention;
FIG. 4 is a positioning disk of the present invention;
FIG. 5 shows the spacer and the upper spacer of the present invention.
[ description of reference ]
1: a support;
2: positioning the disc;
3 a: a first positioning through groove; 3 b: a second positioning through groove;
4 a: a first positioning pin; 4 b: a second positioning pin; 4 c: a third positioning pin;
5: an upper cushion block;
6: an upper filler strip;
7: a lower filler strip;
8: a rock specimen.
Detailed Description
For the purpose of better explaining the present invention and to facilitate understanding, the present invention will be described in detail by way of specific embodiments with reference to the accompanying drawings.
Example one
As shown in fig. 1-5: disclosed in this implementation is a sample anchor clamps for brazilian splitting, include: a support 1, a positioning disc 2 and a positioning pin assembly.
The support 1 comprises a bottom seat stand and a positioning vertical wall arranged on the bottom seat stand;
a first positioning through groove 3a, a second positioning through groove 3b, a third positioning groove hole and a fourth positioning groove hole are formed in the positioning vertical wall; the first positioning through groove 3a, the second positioning through groove 3b and the fourth positioning groove hole are arranged by taking the third positioning groove hole as a circle center.
The dowel pin assembly includes: a first positioning pin 4a, a second positioning pin 4b, a third positioning pin 4c and a lower gasket 7; the first positioning through groove 3a, the second positioning through groove 3b, the third positioning groove hole and the fourth positioning groove hole are respectively used for penetrating the first positioning pin 4a, the second positioning pin 4b, the third positioning pin 4c and the lower filler strip 7.
And a first arc-shaped groove, a second arc-shaped groove, a central groove hole and a third arc-shaped groove are arranged on the positioning disc 2 and are respectively used for arranging the first positioning pin 4a, the second positioning pin 4b, the third positioning pin 4c and the lower gasket 7.
And the first positioning pin 4a and the second positioning pin 4b can be controlled to clamp or release the rock test piece 8 positioned on the other side of the positioning vertical wall by twisting the positioning disc 2.
In the embodiment, the positioning vertical wall on the opposite side of the positioning disc 2 is also provided with an upper cushion block 5;
the upper cushion block 5 is detachably arranged on the positioning vertical wall; the lower end of the upper cushion block 5 is provided with an upper cushion strip 6; the upper padding strip 6 and the upper cushion block 5 are in an integrally formed structure or detachably connected.
In the embodiment, a lower cushion block is also arranged on the bottom seat platform below the positioning vertical wall on the opposite side of the positioning disc 2; the lower cushion block is provided with a lower cushion strip groove; and a lower gasket strip 7 is arranged in the lower gasket strip groove.
In this embodiment, the upper cushion block 5 and the upper cushion strip 6 are integrated, and are connected with an inner groove in the upper cushion block 5 through a protruding end arranged on the upper portion of the positioning vertical wall.
In this embodiment, the positions of the upper filler strip 6 and the lower filler strip 7 are perpendicular to each other and correspond to each other, and the loading diameter line is located on a bus corresponding to the rock test piece 8 in the positioning process.
In this embodiment, the first positioning through groove 3a and the second positioning through groove 3b are both located on the radius of a circle with the third positioning groove hole as the center.
In this embodiment, the first positioning through groove 3a, the second positioning through groove 3b, the positioning disc 2, the inner groove of the upper cushion block 5, the first positioning pin 4a, and the second positioning pin 4b are respectively coated with a lubricant, so that the surfaces thereof are smooth and can freely slide and tightly contact in the operation process.
The embodiment also provides a using method of the specimen clamp for brazilian splitting, which comprises the following steps:
s1, placing a sample clamp for Brazilian splitting as described in the embodiment between an upper pressure head and a lower pressure head of a pressure tester;
s2, placing the round rock test piece on the upper end of the lower backing strip 7, placing the upper cushion block 5 on the protruding end of the support 1, and enabling the axial direction of the rock test piece 8 to be consistent with the directions of the upper backing strip 6 and the lower backing strip 7 as far as possible;
s3, one hand holds the rock test piece 8, the other hand rotates the positioning disc 2 anticlockwise, the first positioning pin 4a and the second positioning pin 4b move in the first positioning through groove 3a and the second positioning through groove 3b respectively until the rock test piece 8 is contacted, at the moment, the accurate positioning of the rock test piece 8 is finished, the two hands are released, and the rock test piece 8 is kept stable;
s4, starting a test, starting a dynamic pressure testing machine, and enabling the rock test piece 8 to be acted by the upper backing strip 6 and the lower backing strip 7 until the rock test piece 8 is split along the diameter line direction of the upper backing strip 6 and the lower backing strip 7;
and S5, finishing the test, and taking out the rock test piece.
Example two
As shown in fig. 1-5: the embodiment discloses a sample anchor clamps that is used for brazilian splitting method test rock tensile strength, including support 1, location disc 2, constant head tank, first locating pin 4a, second locating pin 4b, third locating pin 4c, cushion, upper filler strip 6, lower filler strip 7. The support 1 is connected with the positioning disc 2 through three positioning pins. The positioning disc 2 can rotate clockwise or anticlockwise, and the first positioning pin and the second positioning pin move in the first positioning groove and the second positioning groove along with the rotation of the positioning disc 2. The upper cushion block 5 can be freely detached from the support 1, and the lower end of the upper cushion block 5 is connected with the upper cushion strip 6 as a whole. A lower gasket groove is formed in the center line of the bottom platform of the support, a proper amount of colloid is smeared in the lower gasket groove, and the lower gasket 7 is bonded and fixed in the lower gasket groove to prevent errors caused by movement in the test process. The third positioning pin 4c is fixed with a round hole in the center of the support 1 and has a certain bulge, so that test errors caused in the process of too large contact compression of the rock test piece 8 and the support wall are prevented.
The positioning disc 2 in the embodiment is provided with two secondary circular arcs, one circular arc, the first positioning pin 4a and the second positioning pin 4c are respectively connected with two positioning grooves in the support 1 through the secondary circular arcs, the lower gasket 7 is connected with the positioning disc 2 through the circular arc on the positioning disc, and a proper friction angle is arranged to enable the positioning pins to freely move and to be in close contact with the positioning grooves.
The two secondary arcs are respectively a first secondary arc-shaped groove and a second secondary arc-shaped groove; the circular arc refers to a third circular arc groove.
The upper cushion block 5 and the upper cushion strip 6 in this embodiment are integrated, and the upper cushion block 5 can move freely and contact closely at the protruding end through the protruding end of the upper part of the support 1 connecting with the inner groove of the upper cushion block 5.
The sample object rock test piece 8 in this embodiment is accurately positioned on the upper backing strip 6 and the lower backing strip 7 by positioning the positioning pins, so that the loading diameter line thereof is on the corresponding bus. The bottom of the support 1 and the top of the upper cushion block 5 are both rectangular and horizontal and are in stable contact with the bearing table and the press machine.
As can be seen from fig. 1 to 3, the implementation measure in the present embodiment is a specimen holder for testing the tensile strength of rock by brazilian splitting method, and the specimen holder comprises a support 1, a positioning disc 2, first and second positioning grooves 3a and 3b, first, second and third positioning pins 4a, 4b and 4c, an upper cushion block 5, an upper cushion strip 6 and a lower cushion strip 7.
The support 1 in this embodiment is a whole, the positioning disc 2 is connected with the support 1 through the first, second and third positioning pins 4a, 4b and 4c, a proper friction angle is designed, lubricating oil is coated on the first, second and third positioning pins 4a, 4b and 4c before the test, and the positioning disc 2 freely slides and tightly contacts under the clockwise and counterclockwise conditions.
The reverse side of the positioning disc 2 in the embodiment is respectively provided with a first arc, a second arc, an arc, a first positioning pin 4a connected with a first positioning groove 3a on the support 1 through the first arc, a second positioning pin 4b connected with a second positioning groove 3b on the support 1 through the second arc,
under the condition that positioning disc 2 anticlockwise or clockwise rotation, first, second locating pin 4a, 4b can only be in first constant head tank and the directional removal of second constant head tank simultaneously, be accurate location rock test piece when positioning disc 2 anticlockwise moves.
In the embodiment, the center line of the bottom table of the support 1 is provided with a lower gasket groove, and the lower gasket 7 is placed in the lower gasket groove in a conventional embedded manner, is tightly contacted and cannot move freely.
The upper cushion block 5 and the upper padding strip 6 in this embodiment are of an integral structure, and the upper cushion block 5 can freely move and tightly contact at the protruding end through the protruding end of the upper part of the support 1 connected with the inner groove in the upper cushion block 5. The upper gasket strip 6 and the lower gasket strip 7 are perpendicular to each other and correspond to each other, and the loading diameter line is ensured to be on a bus corresponding to the rock test piece in the positioning process.
In the embodiment, the positioning grooves 3a and 3b, the positioning disc 2, the inner groove of the upper cushion block 5, and the first and second positioning pins 4a and 4b are respectively coated with lubricant, so that the surfaces thereof are smooth and can freely slide and tightly contact in the operation process.
In the embodiment, the outer surfaces of the support 1, the cushion block 5 and the positioning disc 2 are regular figures, so that the invention has the advantages of harmonious and attractive appearance, small size, delicacy and convenient operation.
In the use process of the embodiment, the support 1 is horizontally placed on the operating table, and the first positioning pin, the second positioning pin and the positioning pin 4a, 4b are respectively placed in the first positioning groove and the second positioning groove 3a, 3b on the support. The positioning disc 2 is connected with the support 1 through the positioning pins 4a, 4b and 4c and the lower cushion strip 7, and the cushion block 5 is connected with the convex end of the upper part of the support 1. During the operation, the lubricating oil is applied correspondingly, and then the test operation is started.
The technical principles of the present invention have been described above in connection with specific embodiments, which are intended to explain the principles of the present invention and should not be construed as limiting the scope of the present invention in any way. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without inventive efforts, which shall fall within the scope of the present invention.
Claims (8)
1. A specimen holder for Brazilian splitting, comprising: the positioning device comprises a support, a positioning disc and a positioning pin assembly;
the support comprises a bottom seat stand and a positioning vertical wall arranged on the bottom seat stand;
a first positioning through groove, a second positioning through groove, a third positioning groove hole and a fourth positioning groove hole are formed in the positioning vertical wall;
the first positioning through groove, the second positioning through groove and the fourth positioning groove hole are arranged by taking the third positioning groove hole as a circle center;
the dowel pin assembly includes: the first positioning pin, the second positioning pin, the third positioning pin and the lower filler strip;
the first positioning through groove, the second positioning through groove, the third positioning groove hole and the fourth positioning groove hole are respectively used for penetrating the first positioning pin, the second positioning pin, the third positioning pin and the lower filler strip;
the positioning disc is provided with a first arc-shaped groove, a second arc-shaped groove, a central groove hole and a third arc-shaped groove which are respectively used for arranging the first positioning pin, the second positioning pin, the third positioning pin and the lower filler strip;
and the first positioning pin and the second positioning pin can be controlled to clamp or release the rock test piece on the other surface of the positioning vertical wall by twisting the positioning disc.
2. The specimen holder for Brazilian splitting according to claim 1,
the positioning vertical wall on the opposite side of the positioning disc is also provided with an upper cushion block;
the upper cushion block is detachably arranged on the positioning vertical wall;
the lower end of the upper cushion block is provided with an upper cushion strip;
the upper padding strip and the upper padding block are in an integrally formed structure or detachably connected.
3. The specimen holder for Brazilian splitting according to claim 2,
a lower cushion block is also arranged on the bottom seat stand below the positioning vertical wall on the opposite side of the positioning disc;
the lower cushion block is provided with a lower cushion strip groove;
and a lower gasket strip is arranged in the lower gasket strip groove.
4. The specimen holder for Brazilian splitting according to claim 3,
the upper cushion block and the upper cushion strip are integrated into a whole and are connected with an inner groove in the upper cushion block through a convex end arranged at the upper part of the positioning vertical wall.
5. The specimen holder for Brazilian splitting according to claim 4,
the upper filler strip and the lower filler strip 7 are vertically corresponding to each other, and the loading diameter line is arranged on a bus corresponding to the rock test piece in the positioning process.
6. The specimen holder for Brazilian splitting according to claim 5,
the first positioning through groove and the second positioning through groove are both positioned on the radius of a circle with the third positioning groove hole as the center of circle.
7. The specimen holder for Brazilian splitting according to claim 6,
and the first positioning through groove, the second positioning through groove, the positioning disc, the inner groove of the upper cushion block, the first positioning pin and the second positioning pin are respectively coated with a lubricant, so that the surfaces of the positioning discs can freely slide and tightly contact in the operation process.
8. A use method of a specimen holder for Brazilian splitting is characterized by comprising the following steps:
s1, placing a sample clamp for Brazilian splitting according to any one of claims 1 to 7 between an upper pressure head and a lower pressure head of a pressure tester;
s2, placing the round rock test piece at the upper end of the lower backing strip, placing the upper cushion block at the protruding end of the support, and enabling the axial direction of the rock test piece to be consistent with the directions of the upper backing strip and the lower backing strip as far as possible;
s3, one hand holds the rock test piece, the other hand rotates the positioning disc anticlockwise, the first positioning pin and the second positioning pin move in the first positioning through groove and the second positioning through groove respectively until the first positioning pin and the second positioning pin contact the rock test piece, at the moment, the accurate positioning of the rock test piece is finished, both hands are loosened, and the rock test piece is kept stable;
s4, starting a test, starting a dynamic pressure testing machine, and enabling the rock test piece to be acted by the upper cushion strip and the lower cushion strip until the rock test piece is split along the diameter line direction of the upper cushion strip and the lower cushion strip;
and S5, finishing the test, and taking out the rock test piece.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011080518.2A CN112284888B (en) | 2020-10-10 | 2020-10-10 | A kind of sample fixture for Brazilian splitting and using method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011080518.2A CN112284888B (en) | 2020-10-10 | 2020-10-10 | A kind of sample fixture for Brazilian splitting and using method |
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| CN112284888B true CN112284888B (en) | 2021-07-16 |
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| CN113188906B (en) * | 2021-04-25 | 2022-05-20 | 重庆科技学院 | Rock uniaxial tension test device and method |
| CN113654902B (en) * | 2021-08-11 | 2025-06-06 | 刘凯 | A pressure test device for cans |
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| CN207403454U (en) * | 2017-06-22 | 2018-05-25 | 三木控股集团有限公司 | A kind of pencil holding mechanism of penknife |
| CN207650013U (en) * | 2017-12-15 | 2018-07-24 | 中国电建集团福建省电力勘测设计院有限公司 | A kind of composite material electric pole mechanical property test fixture |
| CN207937290U (en) * | 2018-03-06 | 2018-10-02 | 合肥一煊检测技术有限公司 | A kind of mechanical shock test's platform |
| CN209624231U (en) * | 2019-03-27 | 2019-11-12 | 四川大学 | A kind of clamping device of Brazil's diametral compression test test specimen |
| CN210010602U (en) * | 2019-04-26 | 2020-02-04 | 常州戴芮珂机电科技有限公司 | Flange assembly for chuck of laser pipe cutting machine |
| CN210359335U (en) * | 2019-06-12 | 2020-04-21 | 昆山奥玛泰机电设备有限公司 | Back-pull chuck clamp |
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2020
- 2020-10-10 CN CN202011080518.2A patent/CN112284888B/en not_active Expired - Fee Related
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP3154730U (en) * | 2009-08-10 | 2009-10-22 | 興源機械工業有限公司 | Shielding tool used in heating device for cutting tool holder |
| CN203140817U (en) * | 2013-03-08 | 2013-08-21 | 昆山市佰奥自动化设备科技有限公司 | Three-jaw chuck positioning mechanism |
| CN207403454U (en) * | 2017-06-22 | 2018-05-25 | 三木控股集团有限公司 | A kind of pencil holding mechanism of penknife |
| CN207650013U (en) * | 2017-12-15 | 2018-07-24 | 中国电建集团福建省电力勘测设计院有限公司 | A kind of composite material electric pole mechanical property test fixture |
| CN207937290U (en) * | 2018-03-06 | 2018-10-02 | 合肥一煊检测技术有限公司 | A kind of mechanical shock test's platform |
| CN209624231U (en) * | 2019-03-27 | 2019-11-12 | 四川大学 | A kind of clamping device of Brazil's diametral compression test test specimen |
| CN210010602U (en) * | 2019-04-26 | 2020-02-04 | 常州戴芮珂机电科技有限公司 | Flange assembly for chuck of laser pipe cutting machine |
| CN210359335U (en) * | 2019-06-12 | 2020-04-21 | 昆山奥玛泰机电设备有限公司 | Back-pull chuck clamp |
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|---|---|
| CN112284888A (en) | 2021-01-29 |
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