CN106680120A - High-frequency electro-hydraulic servo fatigue testing machine - Google Patents
High-frequency electro-hydraulic servo fatigue testing machine Download PDFInfo
- Publication number
- CN106680120A CN106680120A CN201710018049.3A CN201710018049A CN106680120A CN 106680120 A CN106680120 A CN 106680120A CN 201710018049 A CN201710018049 A CN 201710018049A CN 106680120 A CN106680120 A CN 106680120A
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- CN
- China
- Prior art keywords
- hydraulic
- testing machine
- fatigue testing
- actuator
- cover plate
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
- G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
- G01N3/36—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces generated by pneumatic or hydraulic means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/04—Chucks
Abstract
The invention relates to a high-frequency electro-hydraulic servo fatigue testing machine. The provided testing machine has the characteristics that a specimen is clamped reliably and stably and test data are accurate. According to the technical scheme, the high-frequency electro-hydraulic servo fatigue testing machine comprises a controller, a hydraulic lift cylinder, two upright posts, a beam and a test assembly; in the test assembly, a hydraulic actuator is vertically arranged at the center of a cover plate, a hydraulic wedge-shaped chuck for clamping a tested component is fixed upwards at the top end of the hydraulic actuator and a hydraulic wedge-shaped chuck is correspondingly arranged downwards on the beam through a force sensor; the hydraulic actuator is also communicated with an external hydraulic pump through an energy accumulator provided with an electro-hydraulic servo valve and a corresponding hydraulic pipeline to introduce power; and the hydraulic wedge-shaped chuck is also communicated with the hydraulic pump through the hydraulic pipeline provided with the electromagnetic valve.
Description
Technical field
The present invention relates to a kind of high-frequency electrohydraulic servo fatigue testing machine, is related to material members performance test field, can carry out
Various fatigue tests such as the cracks can spread that cylindrical specimen stretching, compression, alternate stress are produced.
Background technology
Machine components easily fail, and under sufficiently large alternate stress effect, at hardware profile mutation or surface is carved
The position such as trace or internal flaw, all may cause microfissure because of larger stress concentration.Scattered microfissure is through assembling
Communication will form macroscopic cracking.Established macroscopic cracking rallentando extends, and member cross-sections progressively weaken, when reaching one
When fixed limit is spent, component can rupture suddenly.The above-mentioned failure phenomenon that because of metal alternate stress causes, the referred to as fatigue of metal.Static load
The good material of lower plastic property, when alternate stress is born, does not often have obvious plastic deformation in stress less than yield limit
In the case of, fracture suddenly.Fatigue fracture is significantly divided into two regions：Relatively smooth cracks can spread area and more coarse
Fracture zone.After crackle is formed, when alternate stress makes the both sides of crackle and the when of opening and close, mutually extruding is ground repeatedly, smooth
What area was just formed by.The interruption of load and the change of size, in smooth areas many Crack frontal lines are left.As for coarse
Fracture zone, then finally break to form suddenly.Statistical data shows, the failure of machine components, and there are about 70% or so is fatigue
Cause, and the accident great majority for causing are catastrophic.So, the performance by experimentation metal material resisting fatigue is
It is of practical significance.
Fatigue machine, is a kind of stretching for being mainly used in measure metal and its alloy material under room temperature state, compression
Or drawing, the machine of the experiment on fatigue properties of pressure stress alternation.In the axial fatigue performance test for metal material, at present mostly
Electro-hydraulic servo fatigue experimental machine under the operating mode of high frequency insufficient clamping force, hydraulic system breaks down, in fact it could happen that test specimen is slided
Phenomenon is moved, causes the failure tested.
The content of the invention
In order to overcome the above-mentioned deficiencies of the prior art, the invention provides a kind of high-frequency electrohydraulic servo fatigue testing machine, is somebody's turn to do
Machine should have the characteristics of specimen holder is reliable and stable, test data is accurate.
The present invention is achieved through the following technical solutions：
A kind of high-frequency electrohydraulic servo fatigue testing machine, including controller；It is characterized in that：The machine includes respectively vertically arrangement
Lifting hydraulic cylinder in the base plate left and right sides, the cover plate supported by two side plates be vertically oriented on two columns on base plate,
Can vertically movablely be positioned at two lifting hydraulic cylinder tops and the crossbeam by two guide pillars and positioned at crossbeam and cover plate
Between test suite；In the test suite：Hydraulic actuator is arranged vertically at cover plate central authorities, and the top of hydraulic actuator is past
On fix the hydraulic pressure templin chuck of a clamping unit under test, then by a force transducer accordingly down arrange one on crossbeam
Hydraulic pressure templin chuck；The hydraulic actuator also by with electrohydraulic servo valve accumulator and corresponding fluid pressure line with it is outer
The hydraulic pump in portion connects to introduce power；The hydraulic pressure templin chuck is also by the connection hydraulic pressure of the conduit under fluid pressure with electromagnetic valve
Pump.
The central authorities of the cover plate open and are formed with vertical fixing hole, the body of the hydraulic actuator insert in fixing hole and with
Gripper shoe is welded and fixed.
Hydraulic cylinder in the hydraulic actuator is two-action single-rod hydraulic cylinder.
The force transducer, electrohydraulic servo valve and electromagnetic valve connect controller by data wire respectively.
The present invention control principle be：The hydraulic oil that hydraulic pressure templin chuck 10 is input into by the use of hydraulic cylinder is clamped as power
Test specimen 13, the then action of lifting hydraulic cylinder 4 causes crossbeam to be raised and lowered, and regulates test position；Then hydraulic pump Jing is filtered
Device draw oil from fuel tank, by hydraulic oil input accumulator 6 voltage stabilizing is carried out, and subsequently enters hydraulic actuator 7；Now, control
Device (single-chip microcomputer) processed is made comparisons according to the controller signals of input simultaneously with the signal from sensor feedback out, and through electro-hydraulic
Servo valve control hydraulic fluid pressure and output speed, high pressure liquid is pressed oil and is constantly input to liquid in conversion according to the control signal of setting
The upper oil cavitie and lower oil cavitie of pressure actuator, makes piston reciprocating；Until the testing fatigue of metal specimen terminates.
The invention has the beneficial effects as follows：The present invention can completely simulate the actual condition of high frequency, carry out metal specimen stretching,
Various fatigue tests such as the cracks can spread that compression and alternate stress are produced, when hydraulic power unit breaks down, accumulator can be temporary transient
Power is provided as power source, hydraulic pressure templin chuck can stably clamp test specimen, the occurrence of greatly reduce sliding.And this
Bright to be furnished with sensory feed-back system, measurement is accurate, performance safety reliability.
Additionally, present configuration is simple, and it is reasonable in design, it is easy to operate, it is easy to promote.
Description of the drawings
Fig. 1 is the main structure diagram of the present invention.
Fig. 2 is the left view structural representation of the present invention.
Fig. 3 is A-A in Fig. 1 to structural representation.
Fig. 4 is the B portions mplifying structure schematic diagram in Fig. 1.
Fig. 5 is the D portions mplifying structure schematic diagram in Fig. 1.
Specific embodiment
Further illustrate below in conjunction with specific embodiment shown in the drawings.
High-frequency electrohydraulic servo fatigue testing machine as depicted, including controller (omitting in figure), column 1, crossbeam 2, spiral shell
Female 3 (recommending M14), lifting hydraulic cylinder 4, side plate 5, accumulator 6, hydraulic actuator 7, gripper shoe 8, cover plate 9, hydraulic pressure templin chuck
10th, force transducer 11, clamp nut 12 (recommending M60) and base plate 14.
In the high-frequency electrohydraulic servo fatigue testing machine：The cylinder body of two lifting hydraulic cylinders 4 can vertically movablely be arranged in bottom
The left and right sides of plate 14, the piston rod of each lifting hydraulic cylinder up stretch after again fixing nut 3 is fixed on its top) crossbeam 2,
Crossbeam is fixed on the top of two columns and keeps horizontality；The right and left of the base plate is also respectively arranged (bolt is fixed)
Side plate 5, two side plate levels fix (bolt is fixed) cover plate 9 (gripper shoe 8 is also used for supporting cover plate), vertically solid on cover plate
Determine two columns for crossbeam motion guide (as seen from the figure：Making on crossbeam has and the matched slide opening of column so that horizontal
Beam could can only slide under horizontality along strut length direction).The central authorities of cover plate also vertically arrange a hydraulic actuator
7, the hydraulic pressure templin chuck of a clamping unit under test is up fixed (also known as templin chuck, buyable in the top of hydraulic actuator
Obtain), a force transducer (force transducer is fixed by clamp nut 12) is then passed through on crossbeam a liquid is accordingly down set
Pressure templin chuck；It is visible in figure：The central authorities of the cover plate open and are formed with vertical fixing hole, and the body of the hydraulic actuator is inserted
In fixing hole and body surface is welded and fixed (pad 7-1) with gripper shoe.
The power of the hydraulic actuator is hydraulic oil, is provided by outside hydraulic pump, and by corresponding fluid pressure line
The accumulator for being furnished with electrohydraulic servo valve is first introduced, then input hydraulic pressure actuator.
Used as recommendation, the hydraulic cylinder in the hydraulic actuator (buyable acquisition) is two-action single-rod hydraulic cylinder.
Correspondingly, the hydraulic oil needed for the hydraulic pressure templin chuck, is also provided, by the valvular hydraulic pressure of band by hydraulic pump
Pipeline is introduced.
The force transducer, electrohydraulic servo valve and electromagnetic valve connect controller by data wire respectively.
Those skilled in the technology concerned should be clear and definite, embodiment described above be used as illustrate the present invention, and and
It is non-as limitation of the invention, as long as the present invention essential scope in, change, the modification that above-described embodiment is done all will
Fall in scope of the presently claimed invention.
Claims (4)
1. a kind of high-frequency electrohydraulic servo fatigue testing machine, including controller；It is characterized in that：The machine includes being arranged vertically at respectively
The lifting hydraulic cylinder (4) of the base plate left and right sides, the cover plate (9) supported by two side plates (5) are vertically oriented on two on base plate
Individual column (1), can vertically movablely be positioned at two lifting hydraulic cylinder tops and the crossbeam (2) by two guide pillars and position
Test suite between crossbeam and cover plate；In the test suite：Hydraulic actuator (7) is arranged vertically at cover plate central authorities, liquid
The hydraulic pressure templin chuck (10) of a clamping unit under test is up fixed on the top of pressure actuator, then by power sensing on crossbeam
Device (11) accordingly down arranges a hydraulic pressure templin chuck；The hydraulic actuator is also by the accumulation of energy with electrohydraulic servo valve
Device (6) and corresponding fluid pressure line connect to introduce power with the hydraulic pump of outside；The hydraulic pressure templin chuck is also by band
There is the conduit under fluid pressure connection hydraulic pump of electromagnetic valve.
2. high-frequency electrohydraulic servo fatigue testing machine according to claim 1, it is characterised in that：Open system in the central authorities of the cover plate
The body for having vertical fixing hole, the hydraulic actuator is inserted in fixing hole and is welded and fixed with gripper shoe.
3. high-frequency electrohydraulic servo fatigue testing machine according to claim 2, it is characterised in that：In the hydraulic actuator
Hydraulic cylinder is two-action single-rod hydraulic cylinder.
4. high-frequency electrohydraulic servo fatigue testing machine according to claim 3, it is characterised in that：It is the force transducer, electro-hydraulic
Servo valve and electromagnetic valve connect controller by data wire respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710018049.3A CN106680120A (en) | 2017-01-10 | 2017-01-10 | High-frequency electro-hydraulic servo fatigue testing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710018049.3A CN106680120A (en) | 2017-01-10 | 2017-01-10 | High-frequency electro-hydraulic servo fatigue testing machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106680120A true CN106680120A (en) | 2017-05-17 |
Family
ID=58850342
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710018049.3A Pending CN106680120A (en) | 2017-01-10 | 2017-01-10 | High-frequency electro-hydraulic servo fatigue testing machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106680120A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107589015A (en) * | 2017-07-14 | 2018-01-16 | 同济大学 | A kind of geosynthetics stretching or drawing test clamp device |
| CN107607300A (en) * | 2017-08-25 | 2018-01-19 | 武汉船用机械有限责任公司 | A kind of pull test frock |
| CN107843483A (en) * | 2017-12-04 | 2018-03-27 | 滁州汽车与家电技术及装备研究院 | A kind of high-frequency electrohydraulic servo dynamic stiffness tester |
| CN109655359A (en) * | 2019-01-17 | 2019-04-19 | 中铁第四勘察设计院集团有限公司 | A kind of hydraulic fatigue machine suitable for tunnel protection door |
| CN111398051A (en) * | 2020-03-26 | 2020-07-10 | 中国船舶科学研究中心（中国船舶重工集团公司第七0二研究所） | Polar environment ship structure static and dynamic mechanical property testing device and testing method thereof |
| CN113063663A (en) * | 2021-03-24 | 2021-07-02 | 江苏大学 | Tensile test mechanics experimental facilities |
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| JP2002243606A (en) * | 2001-02-19 | 2002-08-28 | Hokkaido Technology Licence Office Co Ltd | Fatigue tester |
| CN201034882Y (en) * | 2007-04-27 | 2008-03-12 | 济南新三思动态试验技术有限公司 | Hydraulic force clamping head |
| JP2010054204A (en) * | 2008-08-26 | 2010-03-11 | Shimadzu Corp | Testing machine |
| CN102053039A (en) * | 2010-12-07 | 2011-05-11 | 浙江大学 | Engine body hydraulic fatigue test system |
| CN102393340A (en) * | 2011-09-01 | 2012-03-28 | 浙江大学 | Hydraulic fatigue test system of connecting rod |
| CN102645329A (en) * | 2012-04-24 | 2012-08-22 | 浙江工业大学 | Electric liquid harmonic oscillation high frequency fatigue-testing machine and control method of electric liquid harmonic oscillation high frequency fatigue-testing machine |
| CN202928933U (en) * | 2012-04-19 | 2013-05-08 | 深圳市瑞格尔仪器有限公司 | Titanium alloy stress corrosion fatigue test machine |
| CN103822782A (en) * | 2014-03-17 | 2014-05-28 | 昆山线针测试电子有限公司 | Connection rod tensile compression simulating fatigue test bench |
| CN206515172U (en) * | 2017-01-10 | 2017-09-22 | 浙江理工大学 | A kind of high-frequency electrohydraulic servo fatigue testing machine |
-
2017
- 2017-01-10 CN CN201710018049.3A patent/CN106680120A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002243606A (en) * | 2001-02-19 | 2002-08-28 | Hokkaido Technology Licence Office Co Ltd | Fatigue tester |
| CN201034882Y (en) * | 2007-04-27 | 2008-03-12 | 济南新三思动态试验技术有限公司 | Hydraulic force clamping head |
| JP2010054204A (en) * | 2008-08-26 | 2010-03-11 | Shimadzu Corp | Testing machine |
| CN102053039A (en) * | 2010-12-07 | 2011-05-11 | 浙江大学 | Engine body hydraulic fatigue test system |
| CN102393340A (en) * | 2011-09-01 | 2012-03-28 | 浙江大学 | Hydraulic fatigue test system of connecting rod |
| CN202928933U (en) * | 2012-04-19 | 2013-05-08 | 深圳市瑞格尔仪器有限公司 | Titanium alloy stress corrosion fatigue test machine |
| CN102645329A (en) * | 2012-04-24 | 2012-08-22 | 浙江工业大学 | Electric liquid harmonic oscillation high frequency fatigue-testing machine and control method of electric liquid harmonic oscillation high frequency fatigue-testing machine |
| CN103822782A (en) * | 2014-03-17 | 2014-05-28 | 昆山线针测试电子有限公司 | Connection rod tensile compression simulating fatigue test bench |
| CN206515172U (en) * | 2017-01-10 | 2017-09-22 | 浙江理工大学 | A kind of high-frequency electrohydraulic servo fatigue testing machine |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107589015A (en) * | 2017-07-14 | 2018-01-16 | 同济大学 | A kind of geosynthetics stretching or drawing test clamp device |
| CN107589015B (en) * | 2017-07-14 | 2020-10-02 | 同济大学 | Geosynthetic material tensile or drawing test fixture device |
| CN107607300A (en) * | 2017-08-25 | 2018-01-19 | 武汉船用机械有限责任公司 | A kind of pull test frock |
| CN107607300B (en) * | 2017-08-25 | 2019-08-23 | 武汉船用机械有限责任公司 | A kind of pull test tooling |
| CN107843483A (en) * | 2017-12-04 | 2018-03-27 | 滁州汽车与家电技术及装备研究院 | A kind of high-frequency electrohydraulic servo dynamic stiffness tester |
| CN109655359A (en) * | 2019-01-17 | 2019-04-19 | 中铁第四勘察设计院集团有限公司 | A kind of hydraulic fatigue machine suitable for tunnel protection door |
| CN109655359B (en) * | 2019-01-17 | 2023-09-26 | 中铁第四勘察设计院集团有限公司 | Hydraulic fatigue testing machine suitable for tunnel protection door |
| CN111398051A (en) * | 2020-03-26 | 2020-07-10 | 中国船舶科学研究中心（中国船舶重工集团公司第七0二研究所） | Polar environment ship structure static and dynamic mechanical property testing device and testing method thereof |
| CN113063663A (en) * | 2021-03-24 | 2021-07-02 | 江苏大学 | Tensile test mechanics experimental facilities |
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