CN106248505A - A kind of stress relaxation test device and test method - Google Patents
A kind of stress relaxation test device and test method Download PDFInfo
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- CN106248505A CN106248505A CN201610872781.2A CN201610872781A CN106248505A CN 106248505 A CN106248505 A CN 106248505A CN 201610872781 A CN201610872781 A CN 201610872781A CN 106248505 A CN106248505 A CN 106248505A
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- stress relaxation
- locating piece
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- altitude location
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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
- G01N3/20—Investigating strength properties of solid materials by application of mechanical stress by applying steady bending 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
- G01N2203/0014—Type of force applied
- G01N2203/0023—Bending
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- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
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- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
A kind of stress relaxation test device designed by the present invention and test method, wherein this device includes base, submounts installation length locating piece, and the side of length locating piece is provided with tapped through hole and fixed block；Slide rail is had in base one end, setting height(from bottom) locating piece on slide rail, submounts is provided with baffle plate fixing hole, is used for baffle plate is installed, base opposite side is provided with limiting plate, limiting plate is provided with differential head.Test method, based on the said equipment, is first prepared sample, is then calculated test length and total deformation, according to test length and total deformation, sample is installed to test, measure the set deformation volume under different time, calculate stress relaxation rate, then draw out stress relaxation rate curve.The present invention arranges simplicity, easy to operate, can measure the stress relaxation rate of elastic metallic Strip.
Description
Technical field
The present invention relates to a kind of stress relaxation being suitable for the elastic alloy thin plate bands such as copper alloy, aluminium alloy, titanium alloy
Assay device and test method.
Background technology
Stress relaxation, refer to material certain temperature and constraint loaded state under, strain, deform or displacement keep not
Become, and the phenomenon that the prolongation that stress is in time is gradually lowered.
Metal material such as stretches under long-time effect loaded, bend, compress and torsion etc., can make material generation stress
Relax, and then reliability of material and working life can be affected.Elastomeric material or element are not only when High Temperature High Pressure is on active service
Stress relaxation phenomenon can occur, and its at room temperature long service work also can occur.The ability of material elements opposing stress relaxation
Being referred to as relaxation stability, relaxation stability is used under uniform temperature and stress effect residual stress after certain active time
Represent, i.e. residual stress is a few percent of beginning stress, referred to as stress relaxation rate, represents with R%.
" metallic material tensile stress relaxation test method " (GB/T 10120-2013) defines metallic material tensile stress
The contents such as prepared by lax sample, test procedure and test data data, are only used for the means of constant strain-tensile test of material, and not
The test that the bending stress of thin plate strip product is lax can be used for.Owing to domestic stress relaxation test method standard is few, it is impossible to full
Stress relaxation test request under the conditions of foot is polynary, existing GB/T 10120-2013 " metallic material tensile stress relaxation test
Method " higher to the requirement of test specimens in standard, the test period is long, efficiency is low, and the requirement to equipment is higher, wherein specifies
High temperature toroidal bend stress relaxation test method, device is complicated, and complex operation step is unsuitable for the bending stress of actual product
Relaxation property is tested.The working environment of the most current various elastic connecting plug-in unit, is more close with bending stress relaxation test condition,
It more can represent its working condition, bending stress more can meet polynary under the conditions of stress relaxation test requirement.
Summary of the invention
It is an object of the invention to provide one and be suitable for the elastic alloy thin plate bands such as copper alloy, aluminium alloy, titanium alloy
Stress relaxation test device and test method, above-mentioned assay device and test method are capable of thin plate band bending stress
The test of relaxation property, can obtain stress relaxation curve by disposal data.
To achieve these goals, a kind of stress relaxation test device designed by the present invention, including base, submounts
Installation length locating piece, has chute above length locating piece, can adjust length locating piece position on base；At base one
End has slide rail, and setting height(from bottom) locating piece on slide rail changes the height of sample by slip altitude location block.
Further, the side of length locating piece is provided with tapped through hole and fixed block, can be by screw by fixed block
Locking is with fixing sample.
Further, submounts being provided with baffle plate fixing hole, be used for installing baffle plate, it is fixed that baffle plate is mounted for sample
Position, it is ensured that sample edge is with base upper surface in the same plane, it is simple to measurement of focusing under the microscope.
Further, base opposite side is provided with limiting plate, limiting plate is provided with differential head, determined by differential head
The position of altitude location block, it is simple to reload after unloading, utilizes limiting plate to reduce the position of altitude location block accurately.
To achieve these goals, the present invention also provides for a kind of thin plate band bending stress relaxation test method, including such as
Lower step:
Step one, prepares and installs sample, and length locating piece is fixed and is fixed under fixed block by sample.
Step 2, adjusts the position of altitude location block and fixes.
Step 3, places the device in the time of insulation extremely regulation in temperature chamber or heating furnace.
Step 4, takes out device, after being cooled to room temperature, unclamps altitude location block and make sample unload, micro-at instrument
Measure the sample assigned position distance to datum level under mirror, repeat step 2, step 3, step 4, until test period is whole
Complete.
Step 5, arranges test result, draws stress relaxation curve.
Further, in step one, use slide gauge determine the position of length locating piece and fix, baffle plate be installed,
By sample while leaning against on length locating piece and baffle plate, by screw locking fixed block, then unload lower baffle plate.
Further, in step 2, install limiting plate, adjust altitude location block to regulation by rotating differential head
Position is also fixed, and then unloads lower limiting board.
Compared with prior art, one of the present invention is suitable for elastic alloy material stress relaxation test device and test side
Method, by altitude location block to one fixing flexural deformation of sample, is curved stress relaxation test, it is achieved that to thin plate
Band is curved the purpose of stress relaxation test, and apparatus of the present invention make simple simultaneously, easy to operate, have not only saved test
Cost, improves work efficiency, and tests the data obtained accurately and reliably.
Accompanying drawing explanation
Fig. 1 is the structural representation of the stress relaxation test device that present pre-ferred embodiments is provided.
Fig. 2 is the structural representation at another visual angle of the stress relaxation test device that present pre-ferred embodiments is provided.
Fig. 3 is the schematic diagram that sample is tested by present invention stress relaxation test device.
Detailed description of the invention
Refer to Fig. 1～Fig. 3, a kind of stress relaxation test device being suitable for elastomeric material disclosed in this invention, bag
Include base 1, slidably length locating piece 2 on base 1, there is a through-hole groove (not shown), with base 1 in the middle of length locating piece 2
On screw (not shown) corresponding, by screw (not shown), length locating piece 2 is fixed on base 1；Length locating piece 2
Fixed block 3 is installed in side, is positioned by keyway, be provided with in length locating piece 2 side between fixed block 3 and length locating piece 2
Tapped through hole (not shown), by screw locking fixed block 3；One step is set in base 1 end, in the middle of step, has slide rail (figure
Do not show), altitude location block 4 is provided with chute (not shown), is arranged on slide rail slidably, and the position that chute is corresponding with slide rail sets
It is equipped with through hole and screwed hole, by screw, altitude location block 4 is fixed on step；At base 1 one side, limiting plate 5 is installed,
Installing differential head 6 on limiting plate 5, altitude location block 4 is withstood on differential head 6 top, adjusts altitude location block by rotating differential head 6
The position of 4.
The test method of the present invention a kind of stress relaxation test device, concrete operation step is as follows: the stress of preparation standard
Lax sample；Calculating test length l0 and test total deformation δ according to formula 1, wherein sample 8 surface maximum stress σ materialses
The 80% of yield strength；Length locating piece 2 is placed on base 1, uses slide gauge to adjust length locating piece 2 to test
The position of length l0, is screwed length locating piece 2；Baffle plate 7 is arranged on base 1；Sample 8 is placed on fixed block 3
And between base 1, adjust the position of sample 8, make sample 8 be close to length locating piece 2 and baffle plate 7, use screwed lock fastening
Determine block 3 to fix sample 8, unload lower baffle plate 7；Limiting plate 5 is arranged on base 1, altitude location block 4 is contained on slide rail,
Differential head 6 on rotary stopper plate 5, adjusts the position to regulation by altitude location block 4, makes sample 8 reach the total deformation of regulation
Amount δ, is screwed altitude location block 4, unloads lower limiting board 7.
Wherein, δ0: total deformation (mm),
σ: specimen surface maximum stress (N/mm2),
T: sample thickness (mm)
E: elastic modelling quantity (N/mm2)
L0: test length (mm).
Being placed in heating furnace by the device installing sample 8, insulation is to the time t specified at an established temperature, so
After by device take out, after being cooled to room temperature, unload altitude location block 4 and make sample 8 one end be in free state, at tool microscope
Lower measurement sample 8 assigned position is to the set deformation volume δ t of datum level；Measurement is reinstalled altitude location block 4 after terminating, and makes
With limiting plate 5 altitude location block 4 adjusted and then fixes to identical position, again place a device into heating furnace and continue test,
Repeat above step, measure the set deformation volume δ t corresponding to regulation test period t respectively and be fully completed to all test periods,
The stress relaxation rate ε t under each time is calculated according to formula 2.According to the test data of gained, with test period as abscissa,
With stress relaxation rate ε t as vertical coordinate, draw out stress relaxation curve.
Wherein, δ t: the sample set deformation volume (mm) that regulation test period t is corresponding,
δ 0: sample total deformation (mm).
Claims (4)
1. a stress relaxation test device, it is characterised in that: this device includes base (1), length locating piece (2), fixed block
(3), altitude location block (4), limiting plate (5), differential head (6), baffle plate (7)；
Length locating piece (2) is across on base (1), with in the upper slip of base (1)；Build-in in length locating piece (2) one end
Determining block (3), length locating piece (2) lateral surface has tapped through hole, is fixed block (3) by screw；Under base (1) one end has
Fall platform, platform has protruding slide rail, the groove of altitude location block (4) coordinate slip, the side of altitude location block (4) with slide rail
Base (1) end face is close in face；Base (1) upper surface has a screwed hole near the position of altitude location block (4), and baffle plate (7) is solid
Determine to live；Having screwed hole in base (1) another side, be used for fixing limiting plate (5), limiting plate (5) has manhole, is used for pacifying
Dress differential head (6), differential head (6) front end withstands altitude location block (4) side, rotates differential head (6) so that altitude location block (4)
Slide.
2. a test method for stress relaxation test device, comprises the steps:
Step one, prepares and installs sample, is fixed by length locating piece (2) and is fixed under fixed block (3) by sample (8)；
Step 2, adjusts the position of altitude location block (4) and fixes；
Step 3, places the device in the time of insulation extremely regulation in temperature chamber or heating furnace；
Step 4, takes out device, after being cooled to room temperature, unclamps altitude location block (4) and make sample (8) unload, and shows at instrument
Measure sample (8) assigned position distance to datum level under micro mirror, repeat step 2, step 3, step 4, until test period
It is fully completed；
Step 5, arranges test result, draws stress relaxation curve.
3. claim 2 as described in the test method of a kind of stress relaxation test device, it is characterised in that: use vernier calliper
Chi determines the position of length locating piece (2) and fixes, install baffle plate (7), sample (8) is leaned against length locating piece (2) and
On baffle plate (7), by screw locking fixed block (3), then unload lower baffle plate (7).
4. claim 2 as described in the test method of a kind of stress relaxation test device, it is characterised in that: in step 2
In, install limiting plate (5), adjust the position of altitude location block (4) extremely regulation by rotating differential head (6) and fix, then
Unload lower limiting board (5).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610872781.2A CN106248505B (en) | 2016-10-05 | 2016-10-05 | A kind of stress relaxation test device and test method |
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| CN201610872781.2A CN106248505B (en) | 2016-10-05 | 2016-10-05 | A kind of stress relaxation test device and test method |
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| CN106248505A true CN106248505A (en) | 2016-12-21 |
| CN106248505B CN106248505B (en) | 2018-03-27 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107328662A (en) * | 2017-08-24 | 2017-11-07 | 西安科技大学 | A kind of metal material stress relaxation test is extended counter device and test method |
| CN109990739A (en) * | 2019-03-25 | 2019-07-09 | 水利部南京水利水文自动化研究所 | A kind of straight line flume rail linearity degree tester |
| CN110068508A (en) * | 2018-01-24 | 2019-07-30 | 宁波兴业盛泰集团有限公司 | A kind of stress relaxation measuring device of copper strips |
| CN112649306A (en) * | 2020-11-30 | 2021-04-13 | 中国科学院金属研究所 | Device and method for measuring stress relaxation resistance of metal material |
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| CN85102286A (en) * | 1985-04-01 | 1987-05-20 | 中国科学院长春光学精密机械研究所 | Cast iron stress relaxation ability measuring method and device |
| JP2005338029A (en) * | 2004-05-31 | 2005-12-08 | Fuji Electric Holdings Co Ltd | Jig for testing mechanical characteristics of ductile material |
| JP2005337834A (en) * | 2004-05-26 | 2005-12-08 | Jfe Steel Kk | Creep test substituting method and creep test substituting testing machine |
| CN103335894A (en) * | 2013-06-17 | 2013-10-02 | 哈尔滨工业大学 | Titanium alloy stress relaxation test device and method based on V-type hot bending |
| CN204330472U (en) * | 2015-01-13 | 2015-05-13 | 湖州职业技术学院 | A kind of high temperature biaxial stress relaxation testing machine |
-
2016
- 2016-10-05 CN CN201610872781.2A patent/CN106248505B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN85102286A (en) * | 1985-04-01 | 1987-05-20 | 中国科学院长春光学精密机械研究所 | Cast iron stress relaxation ability measuring method and device |
| JP2005337834A (en) * | 2004-05-26 | 2005-12-08 | Jfe Steel Kk | Creep test substituting method and creep test substituting testing machine |
| JP2005338029A (en) * | 2004-05-31 | 2005-12-08 | Fuji Electric Holdings Co Ltd | Jig for testing mechanical characteristics of ductile material |
| CN103335894A (en) * | 2013-06-17 | 2013-10-02 | 哈尔滨工业大学 | Titanium alloy stress relaxation test device and method based on V-type hot bending |
| CN204330472U (en) * | 2015-01-13 | 2015-05-13 | 湖州职业技术学院 | A kind of high temperature biaxial stress relaxation testing machine |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107328662A (en) * | 2017-08-24 | 2017-11-07 | 西安科技大学 | A kind of metal material stress relaxation test is extended counter device and test method |
| CN107328662B (en) * | 2017-08-24 | 2023-03-24 | 西安科技大学 | Extensometer device and method for stress relaxation test of metal material |
| CN110068508A (en) * | 2018-01-24 | 2019-07-30 | 宁波兴业盛泰集团有限公司 | A kind of stress relaxation measuring device of copper strips |
| CN110068508B (en) * | 2018-01-24 | 2021-11-30 | 宁波兴业盛泰集团有限公司 | Stress relaxation measuring device of copper strips |
| CN109990739A (en) * | 2019-03-25 | 2019-07-09 | 水利部南京水利水文自动化研究所 | A kind of straight line flume rail linearity degree tester |
| CN112649306A (en) * | 2020-11-30 | 2021-04-13 | 中国科学院金属研究所 | Device and method for measuring stress relaxation resistance of metal material |
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| CN106248505B (en) | 2018-03-27 |
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Inventor after: Zheng Yun Inventor after: Yuan Hefeng Inventor after: Chen Wensong Inventor after: Peng Lijun Inventor after: Ni Guanguan Inventor after: Wei Chunxia Inventor after: Song Shoumei Inventor after: Hu Wenjiang Inventor after: Wu Xiaolong Inventor before: Zheng Yun Inventor before: Xiong Huiyun Inventor before: Zou Zhongguo Inventor before: Peng Lijun Inventor before: Chen Wensong Inventor before: Zhang Hongfu Inventor before: Hu Wenjiang Inventor before: Wu Xiaolong Inventor before: Zhu Shuijun Inventor before: Lu Jianyue Inventor before: Chen Wenjie |
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