CN109975105B - Automatic measurement system for thickness-direction deformation resistance of plate - Google Patents
Automatic measurement system for thickness-direction deformation resistance of plate Download PDFInfo
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- 238000006073 displacement reaction Methods 0.000 claims abstract description 28
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- 238000009434 installation Methods 0.000 claims abstract description 9
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0676—Force, weight, load, energy, speed or acceleration
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0682—Spatial dimension, e.g. length, area, angle
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Abstract
The invention provides an automatic-detection plate thickness-direction deformation resistance test die and a test system, which comprise a compression female die, a compression male die, a compression block and a measurement system, and are mainly aimed at the research of plane deformation resistance in the plate forming field. The displacement sensor is arranged on the compression female die, the load sensor is arranged on the compression female die, and displacement and load information acting on the test sample piece can be monitored and collected in real time through the two sensors. The measuring system is composed of a measuring rod, a measuring fixed block and a compression spring, and accurate transfer of displacement deformation is achieved, so that the displacement sensor can accurately acquire data. The compression block is designed by adopting a brand-new force transmission calculation method, the weight reduction of the compression block is completed, the right-angle positioning plate is adopted for centering installation and the right-angle slideway is adopted for fixing, the centering degree of the compression block is improved, and the compression block with different areas can be conveniently replaced. The compression mould with the automatic detection function reduces the functional requirements of the test machine, and is convenient for test operation.
Description
Technical Field
The invention belongs to the technical field of material performance testing, and relates to a device for realizing accurate real-time measurement in a compression process through reasonable detection control device construction and structural design, in particular to an automatic detection die for testing the thickness-direction deformation resistance of a plate, and an automatic detection system and a method which are adaptive to the die.
Background
With the rapid development of strut-type industries and construction-type industries such as mechanical manufacturing, aerospace, petrochemical engineering, precision instruments and the like, metal materials are used as basic materials of structures, and play a critical role for a long time, and the method also draws more and more attention on the analysis equipment of material properties. A series of evaluation test methods are established for deeply researching the microstructure and the mechanical property of the metal. Meanwhile, with the development of new industries, intelligent material performance test equipment is also listed in the high-end equipment manufacturing industry, and becomes a key support technical field.
The compression test is an important content in material performance test, and the compression mold is experimental equipment for measuring the deformation force resisting to the unit cross-sectional area when the metal is subjected to plastic deformation under a certain deformation condition. As shown in figure 1, the original compression mould ensures the specific strain condition by making the compression block into a narrow and long shape and adopting reasonable appearance geometric dimension. And in the test, the surfaces of the compression block and the test piece are wiped with lubricant, so that the transverse resistance of the compression block is ensured to be close to 0. The compression process of the test piece is realized by the movement of the upper and lower pointed dies with the same shape. However, the above-mentioned mold has such disadvantages: when the device is static, the upper compression block and the lower compression block have random effect in centering; when the device works, the phenomenon of poor centering is intensified, so that the precision of test measurement is influenced. In addition, the compression block is simple in shape, the whole structure is heavy, reasonable design is not carried out, and the problem of resource waste exists. Subsequently, a compression mold is designed in a bright manner, the lower part of the compression mold is designed to be a concave slide way, so that the measurement test piece is prevented from sliding transversely, and the alignment degree of the test piece and the compression block is improved, as shown in fig. 2. However, the device puts forward higher requirements on the dimensional accuracy of the test specimen due to the limitation of the rail wall plate, and if the machining accuracy is poor, the test specimen cannot be installed or the installation position deviates, so that the test accuracy is influenced. If the compression area is changed for testing, the die needs to be installed and debugged again, and the workload is large. In addition, researches show that the existing compression mold needs to complete real-time recording of required displacement and load data by means of a testing machine acquisition system with high performance, complete functions and high control precision, so that the plane deformation resistance of the metal material is calculated. This will therefore place high demands on the environment in which the test is performed, thereby also increasing the difficulty of the test.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a deformation resistance test mould and a system capable of automatically detecting the displacement and the load of a metal plate in real time. Meanwhile, the device is used for solving the problems of poor centering, complex replacement, poor stress and high requirement on a test system in the prior art.
The complete technical scheme of the invention comprises the following steps:
an automatic measurement system for the thickness-direction deformation resistance of a plate comprises an automatic detection plate thickness-direction deformation resistance test die, wherein the automatic detection plate thickness-direction deformation resistance test die comprises a compression female die, a compression male die, a displacement sensor and a load sensor, the compression female die is positioned above a measured test piece, the compression male die is positioned below the test piece, a lower compression block is arranged above the compression male die in contact with the test piece, an upper compression block is arranged below the compression female die in contact with the test piece, and the upper compression block and the lower compression block have the same structure; the connecting parts of the female die and the upper compression block, the compression male die and the lower compression block are respectively provided with right-angle slideways slightly lower than the edge height of the compression block, and the right-angle slideways are respectively positioned at the centers of the compression female die and the compression male die;
the compression female die is provided with a female die blind hole for installing and fixing the automatic plate thickness direction deformation resistance measuring system;
the compression male die is provided with a mounting hole for mounting a load sensor, and the load sensor is mounted on the compression male die and used for measuring the load in the compression process; the cross section below the compression male die is reduced, and a round hole channel connected with the testing machine is arranged;
the displacement sensor measures the displacement changes of the compression female die and the compression male die in the compression process;
go up the compression piece and adopt cascaded design with lower compression piece, specifically for including the multistage step, adopt the circular arc transition between each step, the foremost end of contacting with the test piece is planar structure, and the dimensional relationship between each step accords with following relation:
di≤3di+1 (1)
bi≤3bi+1 (2)
hi+1>(bi-bi+1) (3)
hi+1>(di-di+1) (4)
in the formula (d)iIs the length of the i-th step, biIs the width of the i-th step, hi+1Is the height of the (i + 1) th step, and i is a positive integer;
the automatic measuring system for the thickness direction deformation resistance of the plate further comprises: a measuring rod and a measuring fixed block; the measuring rod is fixed on the measuring fixed block, and the measuring fixed block is fixed on the compression female die under the action of gravity; a fixed block blind hole is formed in the measuring fixed block, the diameter of the fixed block blind hole is smaller than that of the compression female die blind hole, the compression female die blind hole and the fixed block blind hole form a stepped hole, and a shallow circular groove is drilled inwards below the measuring fixed block; the measuring fixed block is in threaded engagement with the outer sleeve, and a lifting hook is arranged above the outer sleeve;
the measuring rod is of a stepped segmented structure and comprises an upper measuring rod with the diameter gradually decreased from top to bottom and a lower measuring rod with the diameter gradually decreased from top to bottom, the upper measuring rod is tightly combined with a positioning bolt through a larger diameter at the upper part and is provided with an anti-rotation groove, a compression spring is loaded at the middle part, an external thread is arranged at the outer part of the lower part, a threaded hole is arranged at the center of the inner part, the outer part is installed through a positioning nut, and linear reciprocating motion in a certain range is completed through the blocking effect of a stepped hole and the effect of the spring;
the upper part of the lower measuring rod is connected with a threaded hole in the center of the lower part of the upper measuring rod and is fixed through a locking nut, and a straight column type probe with a spherical angle is arranged below the lower measuring rod and is in contact with the upper surface of the compression male die.
The upper compression block and the lower compression block are both four sections of steps, namely a first step with the same cross-sectional area from top to bottom, a second step, a third step and a fourth step with the sequentially reduced cross-sectional areas.
Bolt holes are uniformly distributed on the periphery of the compression female die, and the compression female die is assembled with the testing machine through fixing bolts.
The installation and the replacement of the upper compression block and the lower compression block are controlled by the tightness degree of the fastening bolt.
The method for testing the thickness-direction deformation resistance of the plate by using the system comprises the following steps: enabling the lower compression block to move upwards to compress the test piece, and applying an upward force to a ball angle at the bottom end to drive the whole measuring rod to move upwards so as to enable the upper measuring pin to generate displacement, wherein the lower pin is kept unchanged at the moment and displacement change is generated between the upper pin and the lower pin; obtaining the compression deformation of the test piece in the compression process; and the load sensor measures the compression force of the load sensor, after the experiment is finished, the lower compression block descends, and meanwhile, the lower measuring rod descends under the action of the compression spring and returns to the original position.
The method for testing the thickness-direction deformation resistance of the plate is characterized by comprising the following specific operation steps of: firstly, an upper measuring rod and a lower measuring rod are connected together, then are screwed and fixed through threaded holes, penetrate into holes formed in a measuring fixing block, a compression spring is sleeved in the middle of the measuring rod, the spring is prevented from popping up by means of a positioning nut, and therefore a measuring system capable of linearly contracting is formed, and a compression female die and a compression male die are connected with a testing machine through corresponding connecting structures;
then, the measuring system is placed on a compression female die, and the bottom spherical corner is lightly contacted with the compression female die; place right angle locating piece, cushion and mounting panel with on the die, during the installation compression piece, paste it tight right angle locating piece, then take out, accomplish to the compression piece to the centering degree debugging, screw up the right angle slide, fixed compression piece, with test piece put wherein, open load sensor and displacement sensor's data display, test.
Compared with the prior art, the invention has the following beneficial effects:
1) adopt extensometer measuring device to install in mould and go up the mould, can be according to the condition of testing machine, light installation and dismantlement. And the load sensor is arranged on the lower die of the die, so that the displacement and the load in the compression process are measured in real time, and the compression and measurement are integrated.
2) The plunger type spring reciprocating structure is adopted, so that the measuring rod can be restored to the original initial position after completing the measuring task every time, and the next measurement is carried out.
3) By adopting the module slideway mechanism, the process of replacing the compression block is realized by reasonably controlling the looseness of the bolt, and the purpose of changing the compression area is achieved.
4) The shape design of the compression block is analyzed through a reasonable force transmission path, and under the condition of ensuring reasonable force transmission, the appropriate weight reduction of the compression block is completed and the damage in the compression process is avoided.
5) And a mounting plate and a right-angle positioning block are adopted, a test piece is arranged on the mounting plate and tightly attached to the mounting plate, and the alignment degree debugging of the upper die and the lower die is completed.
6) The device can conveniently realize real-time measurement and acquisition of load and displacement in the compression process, and provides complete test data for sheet forming processing; the device can conveniently replace the compression blocks (21) and (22) to realize tests with different compression areas, and has good centering effect. The deformation resistance test mould with a good measurement system can greatly reduce the functional requirements on the testing machine, and is convenient to test.
Drawings
Fig. 1 is a schematic diagram of a force structure of a compression block in the prior art.
FIG. 2 is a schematic representation of a prior art in-plane strain compression loaded sample.
FIG. 3 is a schematic view of the assembly of the deformation resistance test mold of the present invention.
Fig. 4 is an enlarged view of fig. 3A.
Fig. 5 is an enlarged view at fig. 3B.
Fig. 6 is a schematic view of the centering installation of the present invention.
The specific reference numbers in the figures are as follows:
1-compression male die, 2-straight cylindrical probe with spherical corner, 3-lower measuring rod, 4-compression female die, 5-lock nut, 6-positioning nut, 7-compression spring, 8-female die blind hole, 9-fixed block blind hole, 10-upper measuring rod, 11-anti-rotation groove, 12-lifting hook, 13-positioning bolt, 14-outer sleeve, 15-extensometer, 16-measurement fixed block, 17-circular groove, 18-connecting bolt, 19-fastening bolt, 20-right-angle slideway, 21-upper compression block, 22-lower compression block, 23-mounting hole, 24-circular hole channel, 25-right-angle positioning block and 26-cushion block.
Detailed Description
The invention will be further described with reference to the accompanying drawings and specific embodiments,
3-6, the invention discloses an automatic detection plate thickness direction deformation resistance test mould.
As shown in FIG. 3, the assembly structure of the deformation resistance test mold of the invention is as follows: the compression female die 4 is in a disc shape and is positioned above a test piece to be tested, bolt holes 18 are uniformly distributed on the periphery of the compression female die, and the compression female die is assembled with the testing machine through fixing bolts. The compression male die 1 is positioned below a test piece to be tested and has the same structure as the compression female die. And the same upper and lower compression block mounting structures are respectively arranged above the male die 1 contacted with the test piece and below the female die 5. Wherein, the joints of the female die 4 and the upper compression block 21, the compression male die 1 and the lower compression block 22 are respectively arranged at the centers of the female die and the male die through a module right-angle slideway 20 which is slightly lower than the edge height of the compression block, and the installation of the upper compression block 21 and the lower compression block 22 is reasonably controlled through the tightness degree of the fastening bolt 19. The concave slideway adopted by the invention is used for preventing the tested test piece from transversely sliding, and the alignment degree of the test piece and the compression block is improved. And through the reasonable control to the bolt looseness, realize the process of changing the compression piece, reach the purpose of changing the compression area. And a female die blind hole 8 is formed in the female die 4 and used for installing and fixing a measuring system.
And the convex die body is provided with a mounting hole 23, so that a load sensor is reasonably mounted to detect the load of the plate material acting on the test sample piece in the compression process in real time. The cross section of the lower part of the male die 1 is reduced, and a round hole channel 24 is arranged to be connected with a testing machine.
The design of the upper compression block 21 and the lower compression block 22 is that a multi-step compression block matched with various compression area measurements is completed by adopting a force transfer calculation method, so that the force loss and the material consumption in the transfer process are reduced. The test piece is arranged on the mounting plate and tightly attached to the right-angle positioning block 25, and centering and debugging of the compression block are completed.
Wherein, the upper compression block 21 and the lower compression block 22 adopt a step-type design, specifically, the compression block comprises a plurality of steps with successively reduced cross-sectional areas, the steps are in circular arc transition, and the foremost end in contact with a compression test piece is in a plane structure. Specifically, in the present embodiment, as shown in fig. 3, the upper compression block 21 and the lower compression block 22 are both four steps, that is, the upper and lower cross-sectional areas of the first step are the same, and the cross-sectional areas of the second step, the third step and the fourth step are sequentially reduced. Wherein the fourth step is in contact with the compression coupon. In order to ensure effective transmission and weight reduction of loads in the compression process, the design of the multi-step compression block is completed by calculating the specific sizes of the length, the width and the height of the multi-step compression block, and the size relation among the 2 nd-4 th steps is as follows:
di≤3di+1 (1)
bi≤3bi+1 (2)
hi+1>(bi-bi+1) (3)
hi+1>(di-di+1) (4)
in the formula (d)iIs the length of the i-th step, biIs the width of the i-th step, hi+1The height of the (i + 1) th step is set as i belongs to {1,2,3 };
meanwhile, fillet transition is adopted between each stage of steps so as to realize effective transmission of load in the compression process. Through the design mode, the longitudinal loading force can be concentrated on the fixed area toward the middle part, the compression block is prevented from being damaged in the working process due to the fact that the sectional area is suddenly reduced, and a good weight reducing effect is achieved.
The invention also discloses an automatic measuring system for the thickness-direction deformation resistance of the plate with the die, wherein the extensometer is arranged on the compression female die to measure the deformation of the test plate, the load sensor is arranged on the compression female die, and the load applied by the testing machine to the test plate is monitored in real time. The two devices are matched with a data display, so that the parameters required in the test process can be directly displayed, and the calculation of the plane deformation resistance of the plate material is completed. The integration of measurement and compression is realized, and the requirement on a testing machine is reduced.
This measurement system collects load measurement and displacement measurement in an organic whole, includes: load sensor, extensometer 15, measuring rod lower 3, upper measuring rod 10, measuring solid block 16, etc. Wherein the load sensor is arranged in the mounting hole 23 of the male die 1, and directly monitors the load of the testing machine acting on the test sample. Due to the high requirements for structural precision, displacement measuring devices are set up for this purpose. The displacement measurement adopts the extensometer 15 for measurement, because the extensometer has the characteristics of light structure, convenient use, stability and reliability, but because of the limitation of the size of the extensometer 15, a measurement pin cannot be directly and fixedly installed with a concave-convex die, so the invention adopts a measurement method of combining indirect double rods, namely an upper measurement rod 10 and a lower measurement rod 3. The upper measuring rod 10 is fixed on the measuring solid block 16, and the measuring solid block 16 is fixed on the female die 4 under the action of gravity. The measuring fixed block 16 is provided with a fixed block blind hole 9, the diameter of the fixed block blind hole 9 is smaller than that of the compression female die blind hole 8, and the compression female die blind hole 8 and the fixed block blind hole 9 form a stepped hole. In order to prevent residues, scrap iron and the like in the test environment from floating on the upper surface of the female die 6 and affecting the measurement precision, a shallow circular groove 17 is drilled inwards below the measurement solid block 16, and the influence of the residues in the test environment on the precision of the measurement result is reduced. The measuring block 16 is externally threaded and is in threaded engagement with the outer sleeve 14, and the displacement measuring system can be disassembled and assembled at any time by using the hooks 12 above the sleeve.
The measuring rod adopts a multi-step sectional design, utilizes a plunger type spring reciprocating structural design to complete automatic return of each measurement, is convenient to carry, and has gradually reduced diameter from top to bottom. As can be seen from fig. 3, the upper measuring rod 10 includes an upper portion with a larger area, and is closely combined with the positioning bolt 13 through a larger diameter, and is connected with the upper measuring pin of the extensometer 15, and the upper portion of the upper measuring rod is provided with an anti-rotation groove 11. The middle part of the upper measuring rod 10 is loaded with a compression spring 7, external threads are distributed on the lower outer part, and a threaded hole is arranged in the center. The outer part is mounted by a positioning nut 6, and linear reciprocating motion within a certain range is completed by the blocking action of the stepped hole and the action of a compression spring 7. The lower measuring rod is provided with a straight column type probe 2 with a spherical angle at the lowest part, the upper part of the lower measuring rod is connected with a threaded hole at the center of the upper measuring rod and is fixed through a locking nut 5, and the verticality and the integrity of the measuring rod are ensured. The sectional design mode of the measuring rod reduces the difficulty of part processing and is convenient to carry.
When the deformation resistance test mould is used for working, the lower measuring rod 10 and the measuring rod 3 are firstly connected together, then are screwed and fixed through the threaded holes, penetrate into the holes formed in the measuring fixing block 16, the compression spring 7 is sleeved in the middle of the measuring rod, and the spring is prevented from popping up by means of the positioning nut, so that a measuring system capable of linearly contracting is formed. And connecting the compression female die 6 and the compression male die 1 with the testing machine through corresponding connecting structures. Subsequently, the measuring system is placed on the compression female die 6, and the bottom ball angle is lightly contacted with the compression male die 1. The right-angle positioning block 25, the cushion block 26 and the mounting plate are placed on the female die 6, and when the compression block is mounted, the compression block is tightly attached to the right-angle positioning block 25 and then taken out, so that the centering adjustment of the compression block is completed. The right-angle slideway 20 is screwed down, the compression block is fixed, the test specimen is placed in the compression block, and the data display of the load sensor and the extensometer is opened for testing.
The pin on the upper portion of extensometer connects the upper portion of upper measuring stick 10, and the pin of lower part connects the adapting unit of measuring solid piece 16 top, when carrying out the test, 1) lower compression piece goes upward, compresses the test piece, and upward power is exerted to the bottom ball angle simultaneously, drives whole measuring stick rebound to make upper portion measure the pin and produce the displacement, and the lower part pin keeps unchangeable this moment, produces displacement between the upper and lower pin and changes. And obtaining the compression deformation of the test piece in the compression process. And the load sensor measures the compression force of the load sensor, after the experiment is finished, the lower compression block descends, and meanwhile, the lower measuring rod descends under the action of the compression spring and returns to the original position.
The displacement sensor used in the invention can adopt displacement sensors in other forms such as a grating ruler and the like besides the extensometer.
The deformation resistance test die and the system disclosed by the invention can provide a design basis for calculating the rolling force of the steel plate during cold rolling.
Although exemplary embodiments of the present invention have been described for illustrative purposes, those skilled in the art will appreciate that various modifications, additions, substitutions and the like can be made in form and detail without departing from the scope and spirit of the invention as disclosed in the accompanying claims, all of which are intended to fall within the scope of the claims, and that various steps in the various sections and methods of the claimed product can be combined together in any combination. Therefore, the description of the embodiments disclosed in the present invention is not intended to limit the scope of the present invention, but to describe the present invention. Accordingly, the scope of the present invention is not limited by the above embodiments, but is defined by the claims or their equivalents.
Claims (6)
1. The automatic measurement system for the thickness-direction deformation resistance of the plate is characterized by comprising an automatic detection plate thickness-direction deformation resistance test die, wherein the automatic detection plate thickness-direction deformation resistance test die comprises a compression female die, a compression male die, a displacement sensor and a load sensor, the compression female die is positioned above a measured test piece, the compression male die is positioned below the test piece, a lower compression block is arranged above the compression male die in contact with the test piece, an upper compression block is arranged below the compression female die in contact with the test piece, and the upper compression block and the lower compression block have the same structure; the connecting parts of the female die and the upper compression block, the compression male die and the lower compression block are respectively provided with right-angle slideways slightly lower than the edge height of the compression block, and the right-angle slideways are respectively positioned at the centers of the compression female die and the compression male die;
the automatic measuring system for the thickness direction deformation resistance of the plate further comprises: a measuring rod and a measuring fixed block; the measuring rod is fixed on the measuring fixed block, and the measuring fixed block is fixed on the compression female die under the action of gravity; a fixed block blind hole is formed in the measuring fixed block, the diameter of the fixed block blind hole is smaller than that of the compression female die blind hole, the compression female die blind hole and the fixed block blind hole form a stepped hole, and a shallow circular groove is drilled inwards below the measuring fixed block; the measuring fixed block is in threaded engagement with the outer sleeve, and a lifting hook is arranged above the outer sleeve;
the measuring rod is of a stepped segmented structure and comprises an upper measuring rod with the diameter gradually decreasing from top to bottom and a lower measuring rod with the diameter gradually decreasing from top to bottom, the upper measuring rod is tightly combined with the positioning bolt through a larger diameter at the upper part and is provided with an anti-rotating groove, a compression spring is loaded at the middle part, an external thread is arranged at the outer part of the lower part, a threaded hole is arranged at the center of the inner part, the outer part is installed through a positioning nut, and linear reciprocating motion in a certain range is completed through the blocking effect of a stepped hole and the effect of the spring;
the upper part of the lower measuring rod is connected with a threaded hole at the center of the lower part of the upper measuring rod and is fixed by a locking nut, and a straight column probe with a spherical angle is arranged below the lower measuring rod and is contacted with the upper surface of the compression convex die
The compression female die is provided with a female die blind hole for installing and fixing the measuring rod;
the compression male die is provided with a mounting hole for mounting a load sensor, and the load sensor is mounted on the compression male die and used for measuring the load in the compression process; the cross section below the compression male die is reduced, and a round hole channel connected with the testing machine is arranged;
the displacement sensor measures the displacement changes of the compression female die and the compression male die in the compression process;
go up the compression piece and adopt cascaded design with lower compression piece, specifically for including the multistage step, adopt the circular arc transition between each step, the foremost end of contacting with the test piece is planar structure, and the dimensional relationship between each step accords with following relation:
di≤3di+1 (1)
bi≤3bi+1 (2)
hi+1>(bi-bi+1) (3)
hi+1>(di-di+1) (4)
in the formula (d)iIs the length of the i-th step, biIs the width of the i-th step, hi+1Is the height of the (i + 1) th step, and i is a positive integer.
2. The automatic measurement system for the thickness-direction deformation resistance of the sheet material according to claim 1, is characterized in that: the upper compression block and the lower compression block are both four sections of steps, namely a first step with the same cross-sectional area from top to bottom, a second step, a third step and a fourth step with the sequentially reduced cross-sectional areas.
3. The system for automatically measuring the thickness-direction deformation resistance of the plate according to any one of claims 1-2, wherein: bolt holes are uniformly distributed on the periphery of the compression female die, and the compression female die is assembled with the testing machine through fixing bolts.
4. The system for automatically measuring the thickness-direction deformation resistance of the sheet material according to claim 3, wherein: the installation and the replacement of the upper compression block and the lower compression block are controlled by the tightness degree of the fastening bolt.
5. The method for testing the resistance to the thick deformation of a sheet material by using the system of claim 4, comprising the steps of: enabling the lower compression block to move upwards to compress the test piece, and applying an upward force to a ball angle at the bottom end to drive the whole measuring rod to move upwards so as to enable the upper measuring pin to generate displacement, wherein the lower pin is kept unchanged at the moment and displacement change is generated between the upper pin and the lower pin; obtaining the compression deformation of the test piece in the compression process; and the load sensor measures the compression force of the load sensor, after the experiment is finished, the lower compression block descends, and meanwhile, the lower measuring rod descends under the action of the compression spring and returns to the original position.
6. The method for testing the resistance to the thick-direction deformation of the plate as claimed in claim 5, wherein the specific operation steps are as follows: firstly, an upper measuring rod and a lower measuring rod are connected together, then are screwed and fixed through threaded holes, penetrate into holes formed in a measuring fixing block, a compression spring is sleeved in the middle of the measuring rod, the spring is prevented from popping up by means of a positioning nut, and therefore a measuring system capable of linearly contracting is formed, and a compression female die and a compression male die are connected with a testing machine through corresponding connecting structures;
then, the measuring system capable of linearly contracting is placed on a compression female die, and a bottom spherical corner is lightly contacted with a compression male die; place right angle locating piece, cushion and mounting panel on the die, during the installation compression piece, paste it tight right angle locating piece, then take out, accomplish to the compression piece to the centering degree debugging, screw up the right angle slide, fixed compression piece will test the test piece and put in the middle of the compression piece from top to bottom, open load sensor and displacement sensor's data display, test.
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| CN112775007B (en) * | 2020-12-17 | 2022-12-06 | 江苏长欣车辆装备有限公司 | Detection apparatus for inclined plate of trailer behind processing |
| CN113670719B (en) * | 2021-08-09 | 2022-10-25 | 华南理工大学 | Plane strain compression test die with one die for dual purposes |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US3693419A (en) * | 1970-12-30 | 1972-09-26 | Us Air Force | Compression test |
| US5199304A (en) * | 1992-02-20 | 1993-04-06 | Duffers Scientific, Inc. | Apparatus for optically measuring specimen deformation during material testing |
| CN101281106B (en) * | 2008-05-13 | 2011-07-06 | 北京航空航天大学 | Multi-parameter adjustable press-bending mold with back cartridge measuring apparatus |
| CN102353576B (en) * | 2011-07-08 | 2013-01-23 | 吉林大学 | Small-size test device for mechanical and electrical coupling characteristics |
| CN102539253B (en) * | 2012-02-24 | 2013-08-28 | 西北工业大学 | Tester for measuring real stress-strain curve of plate material under unidirectional compression state |
| CN203164052U (en) * | 2013-04-09 | 2013-08-28 | 江西省天驰高速科技发展有限公司 | Novel compressive resilience modulus testing clamp |
| CN103230977B (en) * | 2013-05-03 | 2014-03-19 | 创美工艺(常熟)有限公司 | Embedded integrated intelligent die |
| CN203337456U (en) * | 2013-06-27 | 2013-12-11 | 攀钢集团成都钢钒有限公司 | Extensometer type displacement detecting device |
| CN105067455A (en) * | 2015-08-07 | 2015-11-18 | 中南大学 | Test device for acquiring plate thermoforming limit diagram |
| DE102016207158B3 (en) * | 2016-04-27 | 2017-09-14 | Technische Universität Dresden | Method and device for mechanical pressure testing of composites in the laminate thickness direction |
| CN206710213U (en) * | 2017-04-21 | 2017-12-05 | 上海华龙测试仪器股份有限公司 | It is a kind of for shock insulation rubber bearing test creep, cupping machine |
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