CN114002056A - Material test connecting device capable of being coaxially adjusted - Google Patents
Material test connecting device capable of being coaxially adjusted Download PDFInfo
- Publication number
- CN114002056A CN114002056A CN202111326793.2A CN202111326793A CN114002056A CN 114002056 A CN114002056 A CN 114002056A CN 202111326793 A CN202111326793 A CN 202111326793A CN 114002056 A CN114002056 A CN 114002056A
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- material test
- connecting device
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- 238000012360 testing method Methods 0.000 title claims abstract description 85
- 239000000463 material Substances 0.000 title claims abstract description 36
- 238000004154 testing of material Methods 0.000 claims abstract description 10
- 239000000314 lubricant Substances 0.000 claims description 5
- 238000002474 experimental method Methods 0.000 abstract description 4
- 238000009864 tensile test Methods 0.000 description 18
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 229910001018 Cast iron Inorganic materials 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 238000005267 amalgamation Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 229940099259 vaseline Drugs 0.000 description 1
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Classifications
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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
-
- 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
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
Abstract
The invention belongs to the technical field of material testing machines, and particularly relates to a material testing connecting device capable of being adjusted coaxially. According to the material test connecting device capable of being coaxially adjusted, the material test connecting device comprises the testing machine connecting part, the coaxial adjusting part and the sample connecting part, wherein the coaxial adjusting part is provided with the steering control disc connected with the testing machine connecting part and the shell unit used for containing the steering control disc, so that the tensile force applied by the testing machine can uniformly act on the sample through the connecting device, the sample is only acted by the axial tensile force all the time, and the accuracy of experimental data is ensured. Therefore, the material test connecting device is simple in principle, good in coaxiality, convenient and efficient to connect and disassemble, and capable of automatically adjusting the relative position of the material test connecting device and a sample during an experiment and always ensuring that the clamp and the sample are coaxial.
Description
Technical Field
The invention belongs to the technical field of material testing machines, and particularly relates to a material testing connecting device capable of being adjusted coaxially.
Background
In modern society, material property research plays an important role in industrial production and human life. By knowing the mechanical properties and the influence factors of the materials, people can be better guided to exert the mechanical properties of various materials. The electronic universal tester is widely applied to material performance tests. The elastic limit, the elongation after fracture, the elastic modulus, the proportional limit, the area reduction, the tensile strength, the yield point, the yield strength and other tensile performance indexes of the material can be measured by adopting a direct tensile experiment of an electronic universal testing machine. However, the conventional electronic universal testing machine still has many problems in the application process, wherein the main problem is that it is difficult to ensure that the coaxial devices at the two ends of the test sample are in the same axis with the test sample, and bending moment or torque is inevitably generated at the root of the test sample, which affects the accuracy of tensile test data. Meanwhile, the existing stretching device is difficult to install and disassemble and poor in universality.
At present, the tensile test is mainly carried out by designing a fixture and a clamp to ensure that the central axis of the fixture is coincident with the axis of a sample.
The Chinese patent with the application number of 201320588064.9 discloses a detachable fixture for a tensile testing machine, wherein a fixture main body comprises a cylindrical tensile testing machine connecting part and a cylindrical tested piece connecting part which are fixedly connected along the axis direction, a through hole which is vertical to the axis of the tensile testing machine connecting part is arranged on the tensile testing machine connecting part, a cavity with an opening at one side is arranged in the middle of the tested piece connecting part and is vertical to the axis of the tensile testing machine connecting part, and grooves which penetrate through the upper bottom surface and the lower bottom surface of the bottom surface plane of a cavity are arranged on the bottom surface plane of the cavity along the transverse direction; the device comprises a cushion block, a wedge groove and a gasket. The axes of the connecting part cushion block, the wedge groove and the gasket of the tensile testing machine are coincided, so that the center line of the fixture is coincided with the tensile axis of the tensile testing machine, the requirement of coaxiality of a processed test piece and the tensile testing machine in the tensile test is met to the maximum extent, the coaxiality is kept within the range allowed by regulations, the tensile strength test result of the processed test piece is further guaranteed to be minimally influenced by the coaxiality of the tensile testing machine, the position of a breakpoint is ideal, and the tensile test result is more accurate.
Chinese patent application No. 201310128176.0 discloses a direct tensile experimental apparatus for avoiding eccentric tension. Includes a test part, a tested part mounted in the test part, and an electromagnetic force control part. The testing component comprises a spherical upper hinge seat and a spherical lower hinge seat matched with the spherical upper hinge seat, an upper pull rod used for being connected with a mechanical testing and simulation testing machine is installed on the spherical upper hinge seat, the spherical lower hinge seat is connected with the cast iron block through a lower pull rod, and the testing component is installed between the upper hinge seat and the lower hinge seat; the electromagnetic force control component is connected with the cast iron block. Because the spherical hinged support which rotates flexibly can enable the test component to naturally droop by gravity when being pulled in the test process, the eccentric force is prevented from acting on the tested component in the tensile test process, and the test result is more accurate in bucking. In addition, the invention has simple structure, convenient operation, economy and practicality, provides reliable test data and reduces test errors.
In the process of a tensile test of the conventional universal testing machine, the coaxiality of a clamp and a sample is difficult to ensure, and the experimental precision is influenced. Above-mentioned utility model patent can both be better in principle satisfy tensile test's axiality, but the patent scheme principle that application number is 201320588064.9 is more complicated, and part quantity is more and processing difficulty. The disassembly is also troublesome, which is not conducive to sample replacement after each test. The patent scheme with the application number of 201310128176.0 is complicated, the clamp is single in type, and the universality is poor.
Disclosure of Invention
In order to solve the problems, the invention provides a material test connecting device capable of coaxially adjusting, which is used for enabling the tensile force applied by a testing machine to uniformly act on a sample, and adopts the following technical scheme:
the invention provides a material test connecting device capable of being coaxially adjusted, which is characterized by comprising: the testing machine connecting part is connected with the testing machine; a coaxial adjusting part which is provided with a steering disc connected with the connecting part of the testing machine and a shell unit used for containing the steering disc; and a sample connecting portion having one end connected to the bottom end of the housing unit and the other end for connecting a sample.
The coaxially adjustable material test connecting device provided by the invention can also be characterized in that the shell unit is formed by splicing tenons, a containing cavity for containing the direction control disc is formed inside the shell unit, and the inner wall of the containing cavity is coated with a lubricant and used for reducing the friction between the direction control disc and the inner wall of the containing cavity when the deviation of the direction control disc is corrected.
The coaxially adjustable material test connection provided by the present invention may also be characterized in that the top of the housing unit has a top opening, the top opening has a diameter larger than the diameter of the test machine connection part, and the top opening has a diameter smaller than the diameter of the steering disk.
The coaxially adjustable material testing attachment provided by the present invention may also be characterized in that the bottom end of the housing unit is cylindrical and detachably connected to the sample attachment portion.
The coaxially adjustable material test connection device provided by the invention can also be characterized in that the test machine connection part is cylindrical, the test machine connection part is provided with a bolt hole, and the test machine connection part and the test machine are detachably connected by inserting the bolt into the bolt hole.
The coaxially adjustable material test connecting device provided by the invention can also be characterized in that the sample connecting part is provided with a fixing sleeve, a sample groove, a clamp sleeve and a tensile clamp, one end of the fixing sleeve is detachably connected with the bottom end of the shell unit, the other end of the fixing sleeve is arranged on the sample groove, one end of the clamp sleeve is detachably connected with the sample groove, the other end of the clamp sleeve is connected with the tensile clamp, and the tensile clamp is used for connecting a sample.
Action and Effect of the invention
According to the material test connecting device capable of being coaxially adjusted, the material test connecting device comprises the testing machine connecting part, the coaxial adjusting part and the sample connecting part, wherein the coaxial adjusting part is provided with the steering control disc connected with the testing machine connecting part and the shell unit used for containing the steering control disc, so that the tensile force applied by the testing machine can uniformly act on the sample through the connecting device, the sample is only acted by the axial tensile force all the time, and the accuracy of experimental data is ensured. Therefore, the material test connecting device is simple in principle, good in coaxiality, convenient and efficient to connect and disassemble, and capable of automatically adjusting the relative position of the material test connecting device and a sample during an experiment and always ensuring that the clamp and the sample are coaxial.
Drawings
FIG. 1 is an exploded view of the structure of a material testing connection device in an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made with reference to the accompanying drawings.
< example >
The present embodiment provides a coaxially adjustable material testing interface 100 for uniformly applying a tensile force applied by a testing machine to a test specimen.
FIG. 1 is an exploded view of the structure of a material testing connection device in an embodiment of the present invention.
As shown in fig. 1, the material test connection device 100 includes a tester connection portion 10, a coaxial adjustment portion 20, and a sample connection portion 30.
The tester connecting portion 10 is connected to a tester. The tester connecting part 10 has a cylindrical shape. The tester connecting portion 10 is provided with a pin hole 11, and the tester connecting portion 10 is tightly connected to a tester (not shown) by inserting a pin into the pin hole. The bottom of the tester connecting part 10 is rigidly connected to the coaxial adjusting part 20.
The coaxial adjusting portion 20 includes a steering disk 21 and a housing unit 22. The steering disk 21 is connected to the tester connecting part 10. The housing unit 22 is used to house the steering wheel 21. The housing unit 22 is formed by splicing the splice tenons 221, and a receiving cavity 222 for receiving the steering disk 21 is formed inside. The inner wall of the accommodating cavity 222 is coated with lubricant (vaseline and the like), and when the deviation of the direction control disc 21 is corrected, the lubricant is used for reducing the friction between the direction control disc 21 and the inner wall of the accommodating cavity 222, reducing the abrasion loss and simultaneously facilitating the alignment of the direction control disc 21. The top of the housing unit 22 has a top opening 223. The diameter of the top opening 223 is larger than the diameter of the tester attachment 10. The diameter of the top opening 223 is smaller than the diameter of the steering disk 21. The bottom end 224 of the housing unit is cylindrical and is detachably connected to the sample connection portion 30.
One end of the sample connecting portion 30 is connected to the bottom end of the housing unit 22, and the other end is used for connecting a sample (not shown). The sample connection portion 30 includes a fixing sleeve 31, a sample groove 32, a clamp sleeve 33, and a tension clamp 34. The bottom end of the housing unit 22 is fitted over the fixing sleeve 31. The fixing sleeve 31 is provided with a bolt hole 35. One end of the fixing sleeve 31 is detachably connected to the bottom end of the housing unit 22 by a bolt, and the other end is disposed on the sample groove 32. The jig sleeve 33 is provided with bolt holes 35. One end of the jig sleeve 33 is detachably connected to the sample tank 32 by a bolt, and the other end is connected to the tension jig 34. The tensile fixture 34 is used to attach the test specimen.
The working principle of the material testing connection device 100 of the present embodiment is as follows:
when the tensile test is started, if the deviation occurs at the start of the test due to human mounting errors, poor calibration of the test equipment, and the like, the steering disk 21 is in an inclined state with respect to the housing cavity 222 and is in close contact with the upper wall of the housing cavity 222, the deviation stops under the action of the pressure on the upper wall of the housing cavity 222 and the upper side of the steering disk 21, and the moment caused by the deviation is counteracted by the counter moment caused by the pressure. So that the tensile force applied by the tester will pass through the material test connection device 100 and act uniformly on the test specimen. The sample is only acted by axial tension all the time, so that the accuracy of experimental data is ensured.
Examples effects and effects
According to the material test connecting device capable of being coaxially adjusted, the material test connecting device comprises the testing machine connecting part, the coaxial adjusting part and the sample connecting part, wherein the coaxial adjusting part is provided with the steering control disc connected with the testing machine connecting part and the shell unit used for containing the steering control disc, so that the tensile force applied by the testing machine can uniformly act on the sample through the connecting device, the sample is only acted by the axial tensile force all the time, and the accuracy of experimental data is ensured. Therefore, the material test connecting device of the embodiment is simple in principle and good in coaxiality, is connected and disassembled with the convenient and efficient universal testing machine connecting device, can automatically adjust the relative position of the material test connecting device and the sample in the experiment, and always ensures that the clamp and the sample are coaxial. Therefore, the device of the embodiment has the advantages of simple principle structure and low economic cost.
The experimental connecting device of material that can coaxially adjust of this embodiment, the shell unit forms through the concatenation tenon amalgamation to testing machine connecting portion, coaxial adjustment portion and sample connecting portion all connect through detachably connected mode, make the device of this embodiment when needs maintenance change, dismantle comparatively easily with the installation, can dismantle fast, easy operation, single can operate, improved efficiency.
The above-described embodiments are merely illustrative of specific embodiments of the present invention, and the present invention is not limited to the description of the above-described embodiments.
The type of tensile anchor clamps of sample connecting portion in above embodiment is unrestricted, can connect multiple tensile anchor clamps, and the suitability is comparatively extensive. In addition, the material test connection device of the above embodiment can be applied to the tensile test of various materials, and the material of the sample is not limited.
Claims (6)
1. A coaxially adjustable material testing interface for uniformly applying a tensile force applied by a testing machine to a test specimen, comprising:
the testing machine connecting part is connected with the testing machine;
a coaxial adjusting part which is provided with a steering control disc connected with the connecting part of the testing machine and a shell unit used for containing the steering control disc; and
and the sample connecting part is connected with one end of the shell unit and the other end of the sample connecting part is used for connecting a sample.
2. The coaxially adjustable material test connection of claim 1, wherein:
wherein the shell unit is spliced by splicing tenons, and an accommodating cavity for accommodating the direction control disc is formed inside the shell unit,
the inner wall of the accommodating cavity is coated with a lubricant, and the lubricant is used for reducing friction between the direction control disc and the inner wall of the accommodating cavity when the direction control disc is used for deviation rectification.
3. The coaxially adjustable material test connection of claim 1, wherein:
wherein the top of the housing unit has a top opening,
the diameter of the top opening is larger than that of the connecting part of the testing machine,
the diameter of the top opening is smaller than that of the direction control disc.
4. The coaxially adjustable material test connection of claim 1, wherein:
the bottom end of the shell unit is cylindrical and is detachably connected with the sample connecting part.
5. The coaxially adjustable material test connection of claim 1, wherein:
wherein the connecting part of the testing machine is in a cylindrical shape,
the testing machine connecting portion is provided with a bolt hole, and the bolt hole enables the testing machine connecting portion to be detachably connected with the testing machine.
6. The coaxially adjustable material test connection of claim 1, wherein:
wherein the sample connecting part is provided with a fixing sleeve, a sample groove, a clamp sleeve and a stretching clamp,
one end of the fixed sleeve is detachably connected with the bottom end of the shell unit, the other end of the fixed sleeve is arranged on the sample groove,
one end of the clamp sleeve is detachably connected with the sample groove, the other end of the clamp sleeve is connected with the stretching clamp,
the tensile clamp is used for connecting a sample.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111326793.2A CN114002056B (en) | 2021-11-10 | 2021-11-10 | Coaxially adjustable material test connection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111326793.2A CN114002056B (en) | 2021-11-10 | 2021-11-10 | Coaxially adjustable material test connection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114002056A true CN114002056A (en) | 2022-02-01 |
| CN114002056B CN114002056B (en) | 2024-04-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111326793.2A Active CN114002056B (en) | 2021-11-10 | 2021-11-10 | Coaxially adjustable material test connection device |
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| CN (1) | CN114002056B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR200402455Y1 (en) * | 2005-09-09 | 2005-11-30 | 주식회사 알앤비 | Pin specimen self-alignment jig |
| CN201707256U (en) * | 2010-05-31 | 2011-01-12 | 武汉钢铁(集团)公司 | Sample vertical centering clamp for tensile testing machine |
| CN207007612U (en) * | 2017-07-17 | 2018-02-13 | 苏州汇才土水工程科技有限公司 | Material axial direction compression test adaptive allocation head |
| CN108562491A (en) * | 2018-04-24 | 2018-09-21 | 钦州学院 | Automatic centering type rocks in direct tension experimental rig |
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| CN111855396A (en) * | 2020-08-12 | 2020-10-30 | 西北工业大学 | Be used for mandrel to weave carbon-carbon composite material ultra-high temperature tensile test anchor clamps |
| CN212748692U (en) * | 2020-04-09 | 2021-03-19 | 广东省建设工程质量安全检测总站有限公司 | Ceramic tile adhesive drawing test equipment |
-
2021
- 2021-11-10 CN CN202111326793.2A patent/CN114002056B/en active Active
Patent Citations (7)
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|---|---|---|---|---|
| KR200402455Y1 (en) * | 2005-09-09 | 2005-11-30 | 주식회사 알앤비 | Pin specimen self-alignment jig |
| CN201707256U (en) * | 2010-05-31 | 2011-01-12 | 武汉钢铁(集团)公司 | Sample vertical centering clamp for tensile testing machine |
| CN207007612U (en) * | 2017-07-17 | 2018-02-13 | 苏州汇才土水工程科技有限公司 | Material axial direction compression test adaptive allocation head |
| CN108562491A (en) * | 2018-04-24 | 2018-09-21 | 钦州学院 | Automatic centering type rocks in direct tension experimental rig |
| CN208297239U (en) * | 2018-05-31 | 2018-12-28 | 武汉华拓量测科技有限公司 | A kind of sample for calibrating axial loading classes testing machine Loading coaxality device |
| CN212748692U (en) * | 2020-04-09 | 2021-03-19 | 广东省建设工程质量安全检测总站有限公司 | Ceramic tile adhesive drawing test equipment |
| CN111855396A (en) * | 2020-08-12 | 2020-10-30 | 西北工业大学 | Be used for mandrel to weave carbon-carbon composite material ultra-high temperature tensile test anchor clamps |
Non-Patent Citations (1)
| Title |
|---|
| 赵元;: "拉伸试验的同轴度分析", 工程与试验, no. 1 * |
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