CN106033026A - Control arm assembly front and rear bushing fatigue test device and test method - Google Patents
Control arm assembly front and rear bushing fatigue test device and test method Download PDFInfo
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- CN106033026A CN106033026A CN201610462689.9A CN201610462689A CN106033026A CN 106033026 A CN106033026 A CN 106033026A CN 201610462689 A CN201610462689 A CN 201610462689A CN 106033026 A CN106033026 A CN 106033026A
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- 238000009661 fatigue test Methods 0.000 title claims abstract description 12
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- 230000007246 mechanism Effects 0.000 claims description 13
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- 238000003556 assay Methods 0.000 claims description 4
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- 238000001228 spectrum Methods 0.000 abstract description 13
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention provides a control arm assembly front and rear bushing fatigue test device providing a random spectrum test and a test method applying the device. A failure mode and a failure mileage, close to a practical application result, of a control arm assembly front and rear bushing can be obtained. The fatigue test device comprises a swing rack which is provided with a first tool used for fixing the hinge pin fixed end of a control arm assembly to be tested and a second tool used for fixing the front and rear bushing fixed end of the control arm assembly to be tested, the line of centers of front and rear bushing fixed pins of the second tool is parallel to a swing axle of the swing rack, a third tool which is used for providing an X-direction load and a Y-direction load of the test control arm assembly is arranged on the side of the swing rack, and the third tool is connected with the ball pin fixed end of the control arm assembly to be tested. According to the control arm assembly front and rear bushing fatigue test device providing the random spectrum test and the test method applying the device, a practical application stress state of the control arm assembly can be simulated in the test, and the failure mode and the failure mileage, close to the practical application result, of the control arm assembly front and rear bushing are obtained.
Description
Technical field
The present invention relates to automobile suspension system technical field, be specifically related to the tired examination of a kind of control arm assembly front and rear bushings
Experiment device and test method.
Background technology
Along with the development of auto industry, automobile plays the part of the most important role in people live, and people are to automobile
Properties especially NVH Performance And Reliability requires more and more higher.
Rubber bushing is widely applied in automobile chassis system, the goods that it is made up of rubber and metal, and having can
With advantages such as decay, absorption dither and noise, and volume are little, lightweight.The place complicated in stress exists widely
Application, such as places such as vehicle frame, torsion-beam, connecting rod, control arms.Control arm, as the important component part of frame assembly, once controls
Arm bush lost efficacy, and will have a strong impact on NVH performance and the comfortableness of automobile, and even affect the safety of automobile.The most each greatly
The fatigue life of rubber bushing parts is verified and attaches great importance to by main engine plants.
Automobile test is divided into real road to test, skid pad test and indoor bench test.Indoor bench test is due to week
Phase is short, low cost, repdocutbility are good and becomes the most widely used test method of stage now.Indoor bench test can be divided into again
Constant amplitude spectrum test and multistage spectrum test.In the test of rubber-like, present stage uses constant amplitude spectrum test, mostly due to rubber
Series products improves along with multiplying power is moved in the increase of load amplitude, occurs Dynamic softening phenomenon therewith, and the increase rubber bushing of frequency
The heat produced also can increase, and therefore rubber-based products can not use S-N curve method road spectrum to be turned as metallic element
Chemical conversion constant amplitude spectrum is tested.Result of the test and the practical using result of constant amplitude spectrum test was in either failure mode still lost efficacy
All there is bigger difference in journey.
Summary of the invention
The primary and foremost purpose of the present invention is the tired of a kind of control arm assembly front and rear bushings that random spectrum can be provided to test of proposition
Labor assay device, can obtain in failure mode and the inefficacy of the control arm assembly front and rear bushings close with practical using result
Journey.
According to the fatigue experimental device of the control arm assembly front and rear bushings that the present invention provides, including swinging stand, described pendulum
Dynamic stand is provided with fixes the first frock of end and for fixing control to be tested for the bearing pin fixing control arm assembly to be tested
Before and after arm assembly processed, the second frock of end fixed by lining, the line of centres of lining steady pin and institute before and after described second frock
The swinging axle stating swing stand is parallel, and the side of described swing stand is additionally provided with the X for providing described controlling test arm assembly
To the 3rd frock with Y-direction load, described 3rd frock end fixing with the ball stud of described control arm assembly to be tested is connected.
The fatigue experimental device of the control arm assembly front and rear bushings of the present invention, led to respectively by control arm assembly during on-test
Cross the first frock, the second frock and the clamping of the 3rd frock, thus the real vehicle simulating control arm assembly on test-bed installs shape
State；In test by the 3rd frock provide control arm assembly X to Y-direction load, by swing stand by swing provide control
The Z-direction torsional load of arm assembly, thus simulate in test the actually used stress of control arm assembly, obtain making with actual
With failure mode and the inefficacy mileage of the close control arm assembly front and rear bushings of result.
Further, described 3rd frock includes that L-shaped linking arm, described L-shaped linking arm include that orthogonal X is to load
Arm and Y-direction load arm, described X connects altogether to one end of load arm and Y-direction load arm, and described X passes through even to the other end of load arm
Extension bar and the first hydraulic servomechanism connect, described Y-direction load arm the other end by connecting rod and the second hydraulic servo-machine
Structure connects, and described X is fixing with the ball stud of described control arm assembly to be tested to the connection end of load arm and Y-direction load arm to be held
Even.By L-shaped linking arm, can be more nearly simulates control arm assembly X at ball stud, Y-direction load on test-bed
Lotus, make result of the test and practical service environment closer to.
Further, described X is all fixed with guide connecting rod by hinge to load arm and Y-direction load arm, described guiding
The other end of connecting rod and fixing seat pass through stud connection.L-shaped linking arm is stable by guiding mechanism, compares X to load arm and Y
The most hinged with hydraulic servomechanism to load arm, there is higher stability, altofrequency and more durable examination can be born
Test requirement.
Further, the two ends of described swing stand are connected with bearing block, and movable joint spiral shell is passed through in the bottom of described swing stand
Bolt is connected with displacement transmission mechanism, and described displacement transmission mechanism and the 3rd hydraulic servomechanism connect.By swinging bottom stand
The hinged displacement load that torsional load is converted into servo control mechanism, simple in construction, reliability is high.
Before and after the present invention also provides for applying the control arm assembly of the fatigue experimental device of above-mentioned control arm assembly front and rear bushings
The fatigue test method of lining.
According to the fatigue test method of the control arm assembly front and rear bushings that the present invention provides, before applying above-mentioned control arm assembly
The fatigue experimental device of back bush, it is critical only that and comprise the following steps:
A, control arm assembly to be tested is fixed on described assay device；
B, according to comprehensive road condition road compose in control arm ball stud at X, Y-direction load and by absorber spring strain change
The Z-direction load of the control arm front and rear bushings line of centres arrived, uses CRPC software processes signal source, obtains X, Y-direction force value target
Signal and Z-direction displacement target signal；
C, X, Y-direction force value echo signal and Z-direction displacement target signal to step B are iterated computing, obtain respectively obtaining
One hydraulic servomechanism, the second hydraulic servomechanism and the driving signal of the 3rd hydraulic servomechanism.
The fatigue test method of the control arm assembly front and rear bushings of the present invention, uses the ball of control arm in the spectrum of comprehensive road condition road
X at head pin, Y-direction load and the Z-direction of the control arm front and rear bushings line of centres being converted to by absorber spring strain carry
Lotus, uses CRPC software processes X, Y-direction load and Z-direction load signal source, by iterative computation obtain the first hydraulic servomechanism,
Second hydraulic servomechanism and the driving signal of the 3rd hydraulic servomechanism, thus by driving signal to drive the first hydraulic servo
Mechanism, the second hydraulic servomechanism and the 3rd hydraulic servomechanism carry out durable test to control arm assembly, obtain making with actual
With failure mode and the inefficacy mileage of the close control arm assembly front and rear bushings of result.
Preferably, the iteration factor of described interative computation is 0.4.
Specifically, the system frequency response inverse function of described interative computation can be obtained by following three-step approach: the first step: institute
State the first hydraulic servomechanism and the control system of the second hydraulic servomechanism or the control system of described 3rd hydraulic servomechanism
System produces a wide band white noise；Second step: with the white noise generated as driving signal, produce response signal, calculate
The frequency response function of described control system；3rd step: utilize reverse instrument to seek the inverse matrix of frequency response function.
Accompanying drawing explanation
Fig. 1 is the structural representation of the fatigue experimental device of the control arm assembly front and rear bushings of the present invention.
Fig. 2 is swing stand and the attachment structure schematic diagram of displacement transmission mechanism of the present invention.
Detailed description of the invention
Below against accompanying drawing, by the description to embodiment, to the most involved each of the detailed description of the invention of the present invention
Mutual alignment and annexation, the effect of each several part and operation principle etc. between the shape of component, structure, each several part are made into one
The detailed description of step.
Embodiment 1:
As Fig. 1,2, the fatigue experimental device of the control arm assembly front and rear bushings of the present invention, including swing stand 1, described oscillating table
Frame 1 is provided with fixes the first frock 3 of end and for fixing control to be tested for the bearing pin fixing control arm assembly 2 to be tested
Before and after arm assembly 2, the second frock 4 of end fixed by lining, before and after described second frock 4 line of centres of lining steady pin with
The swinging axle of described swing stand 1 is parallel, and the side of described swing stand 1 is additionally provided with for providing described controlling test arm assembly
The X of 2 is to the 3rd frock 5 with Y-direction load, and described 3rd frock 5 is fixing end with the ball stud of described control arm assembly 2 to be tested
Connect.
The fatigue experimental device of the control arm assembly front and rear bushings of the present invention, during on-test by control arm assembly 2 respectively
Clamped by first frock the 3, second frock 4 and the 3rd frock 5, thus on test-bed, simulate the real vehicle of control arm assembly 2
Installment state；In test by the 3rd frock 5 provide the X of control arm assembly 2 to Y-direction load, by swinging stand 1 by swinging
The Z-direction torsional load of control arm assembly 2 is provided, thus simulates in test the actually used stress of control arm assembly 2,
Failure mode and inefficacy mileage to control arm assembly 2 front and rear bushings close with practical using result.
Further, described 3rd frock 5 includes that L-shaped linking arm 5, described L-shaped linking arm include that orthogonal X is to load
Lotus arm 51 and Y-direction load arm 52, described X connects altogether to one end of load arm 51 and Y-direction load arm 52, and described X is to load arm 51
The other end is connected with the first hydraulic servomechanism (not shown) by connecting rod 511, described Y-direction load arm 52 another
End is connected with the second hydraulic servomechanism (not shown) by connecting rod 521, and described X is to load arm 51 and Y-direction load arm
Fixing end connects with the ball stud of described control arm assembly 2 to be tested in the connection end of 52.By L-shaped linking arm 5, can be more nearly
On test-bed, simulate the control arm assembly 2 X at ball stud, Y-direction load, make result of the test with practical service environment more
For close.
Further, described X is fixed with guide connecting rod 512 by hinge to load arm 51, guide connecting rod 512 another
One end and fixing seat 513 pass through stud connection；Y-direction load arm 52 is fixed with guide connecting rod 522 by hinge, the described company of guiding
The other end of extension bar 522 and fixing seat 523 pass through stud connection.L-shaped linking arm 5 is stable by guiding mechanism, compares X to load
Arm 51 and Y-direction load arm 52 are the most hinged with hydraulic servomechanism, have higher stability, can bear altofrequency and more
Durable test requirements document.
Further, the two ends of described swing stand 1 are connected with bearing block 11, and the bottom of described swing stand 1 is by living
Joint bolt 12 is connected with displacement transmission mechanism 13, described displacement transmission mechanism 13 and the 3rd hydraulic servomechanism (not shown)
Connect.By swinging the hinged displacement load that torsional load is converted into servo control mechanism bottom stand 1, simple in construction, reliably
Property high.
The fatigue test method of the control arm assembly front and rear bushings that the present invention provides, serves as a contrast before and after applying above-mentioned control arm assembly
The fatigue experimental device of set, comprises the following steps:
A, control arm assembly to be tested is fixed on described assay device；
B, according to comprehensive road condition road compose in control arm ball stud at X, Y-direction load and by absorber spring strain change
The Z-direction load of the control arm front and rear bushings line of centres arrived, uses CRPC software processes signal source, obtains X, Y-direction force value target
Signal and Z-direction displacement target signal；
C, X, Y-direction force value echo signal and Z-direction displacement target signal to step B are iterated computing, obtain respectively obtaining
One hydraulic servomechanism, the second hydraulic servomechanism and the driving signal of the 3rd hydraulic servomechanism.
Wherein, it is preferred that the iteration factor of described interative computation is 0.4.In general, comprehensive road condition road spectrum is 30,000 public affairs
In comprehensive road condition road spectrum.Specifically, the system frequency response inverse function of described interative computation can be obtained by following three-step approach: the
One step: described first hydraulic servomechanism and the control system of the second hydraulic servomechanism or described 3rd hydraulic servomechanism
Control system produces a wide band white noise；Second step: with the white noise generated as driving signal, produce response letter
Number, calculate the frequency response function of described control system；3rd step: utilize reverse instrument to seek the inverse matrix of frequency response function.
Wherein, concretely comprising the following steps of iterative computation: according to echo signal, system frequency response inverse function and iteration factor, obtain
Initial driving signal (zero degree drives signal), frequency response inverse function is for indicating driving signal and the response of hydraulic servo actuator
The functional relationship of signal；Initial driving signal is used to control Hydrauservo System loading force or displacement, it is thus achieved that initial communication signal,
Calculate the difference of echo signal and initial communication signal, obtain initial difference, if initial difference is in preset range, then at the beginning of using
Beginning driving signal is as driving signal, if initial difference is not within the predefined range, then according to initial difference, system frequency response inverse function
And iteration factor, calculate and drive signal for the first time；Use and drive signal to control Hydrauservo System loaded load for the first time, it is thus achieved that
Response signal for the first time, the difference calculating echo signal with responding signal for the first time, obtain difference for the first time, if difference for the first time
In preset range, then employing driving signal for the first time is as driving signal, if difference is not within the predefined range for the first time, then and root
According to first time difference, system frequency response inverse function and iteration factor, calculate second time and drive signal；Repeat said process, until
Response signal and the difference of echo signal are in preset range eventually, and employing finally drives signal as driving signal.
The fatigue test method of the control arm assembly front and rear bushings of the present invention, uses the ball of control arm in the spectrum of comprehensive road condition road
X at head pin, Y-direction load and the Z-direction of the control arm front and rear bushings line of centres being converted to by absorber spring strain carry
Lotus, uses CRPC software processes X, Y-direction load and Z-direction load signal source, by iterative computation obtain the first hydraulic servomechanism,
Second hydraulic servomechanism and the driving signal of the 3rd hydraulic servomechanism, thus by driving signal to drive the first hydraulic servo
Mechanism, the second hydraulic servomechanism and the 3rd hydraulic servomechanism carry out durable test to control arm assembly, obtain making with actual
With failure mode and the inefficacy mileage of the close control arm assembly front and rear bushings of result.
Claims (7)
1. the fatigue experimental device of a control arm assembly front and rear bushings, it is characterised in that include swinging stand, described oscillating table
Frame is provided with fixes the first frock of end and for fixing control arm to be tested for the bearing pin fixing control arm assembly to be tested
Before and after assembly, the second frock of end fixed by lining, the line of centres of lining steady pin and described pendulum before and after described second frock
The swinging axle of dynamic stand is parallel, the side of described swing stand be additionally provided with for provide the X of described controlling test arm assembly to and Y
To the 3rd frock of load, described 3rd frock end fixing with the ball stud of described control arm assembly to be tested is connected.
The fatigue experimental device of control arm assembly front and rear bushings the most according to claim 1, it is characterised in that the described 3rd
Frock include L-shaped linking arm, described L-shaped linking arm include orthogonal X to load arm and Y-direction load arm, described X is to load
One end of arm and Y-direction load arm connects altogether, and described X is to the other end of load arm by connecting rod with the first hydraulic servomechanism even
Connect, described Y-direction load arm the other end be connected with the second hydraulic servomechanism by connecting rod, described X is to load arm and Y-direction
Fixing end connects with the ball stud of described control arm assembly to be tested in the connection end of load arm.
The fatigue experimental device of control arm assembly front and rear bushings the most according to claim 2, it is characterised in that described X is to load
Lotus arm and Y-direction load arm are all fixed with guide connecting rod by hinge, and the other end of described guide connecting rod passes through with fixing seat
Stud connection.
The fatigue experimental device of control arm assembly front and rear bushings the most according to claim 3, it is characterised in that described swing
The two ends of stand are connected with bearing block, and the bottom of described swing stand is connected with displacement transmission mechanism by eyelet bolt, described
Displacement transmission mechanism and the 3rd hydraulic servomechanism connect.
5. a fatigue test method for control arm assembly front and rear bushings, serves as a contrast before and after applying control arm assembly described in claim 4
The fatigue experimental device of set, it is characterised in that comprise the following steps:
A, control arm assembly to be tested is fixed on described assay device；
B, according to comprehensive road condition road compose in control arm ball stud at X, Y-direction load and by absorber spring strain change
The Z-direction load of the control arm front and rear bushings line of centres arrived, uses CRPC software processes signal source, obtains X, Y-direction force value target
Signal and Z-direction displacement target signal；
C, X, Y-direction force value echo signal and Z-direction displacement target signal to step B are iterated computing, obtain respectively obtaining
One hydraulic servomechanism, the second hydraulic servomechanism and the driving signal of the 3rd hydraulic servomechanism.
The fatigue test method of control arm assembly front and rear bushings the most according to claim 5, it is characterised in that described iteration
The iteration factor of computing is 0.4.
The fatigue test method of control arm assembly front and rear bushings the most according to claim 5, it is characterised in that described iteration
The system frequency response inverse function of computing can be obtained by following three-step approach: the first step: described first hydraulic servomechanism and second
The control system of hydraulic servomechanism or the control system of described 3rd hydraulic servomechanism produce a wide band white noise；
Second step: with the white noise generated as driving signal, produce response signal, calculate the frequency response function of described control system；The
Three steps: utilize reverse instrument to seek the inverse matrix of frequency response function.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610462689.9A CN106033026A (en) | 2016-06-23 | 2016-06-23 | Control arm assembly front and rear bushing fatigue test device and test method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610462689.9A CN106033026A (en) | 2016-06-23 | 2016-06-23 | Control arm assembly front and rear bushing fatigue test device and test method |
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| CN106033026A true CN106033026A (en) | 2016-10-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610462689.9A Pending CN106033026A (en) | 2016-06-23 | 2016-06-23 | Control arm assembly front and rear bushing fatigue test device and test method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106525413A (en) * | 2016-12-30 | 2017-03-22 | 宁波建新底盘系统有限公司 | Vehicle rubber bushing fatigue tester |
| CN108414179A (en) * | 2018-03-29 | 2018-08-17 | 华南理工大学 | A kind of automobile control arm impact test tooling |
| CN110006666A (en) * | 2019-04-28 | 2019-07-12 | 中国第一汽车股份有限公司 | Passenger car McPherson strut control arm assembly Bench Test System |
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| CN104483112A (en) * | 2014-11-28 | 2015-04-01 | 奇瑞汽车股份有限公司 | Fatigue test method and fixture thereof of rubber bushing |
| CN104677625A (en) * | 2015-03-25 | 2015-06-03 | 奇瑞汽车股份有限公司 | Unilateral random spectrum loading testing tooling and testing method for rear axle torsional fatigue |
| CN105043789A (en) * | 2015-06-01 | 2015-11-11 | 奇瑞汽车股份有限公司 | Rigidity test method and device for automobile control arm |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN202631234U (en) * | 2012-04-23 | 2012-12-26 | 上海汇众汽车制造有限公司 | Control arm test clamp |
| CN103471856A (en) * | 2013-08-30 | 2013-12-25 | 奇瑞汽车股份有限公司 | Device and method for testing front sub-frame assembly of automobile |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106525413A (en) * | 2016-12-30 | 2017-03-22 | 宁波建新底盘系统有限公司 | Vehicle rubber bushing fatigue tester |
| CN106525413B (en) * | 2016-12-30 | 2019-03-05 | 宁波建新底盘系统有限公司 | A kind of automobile rubber bush fatigue experimental device |
| CN108414179A (en) * | 2018-03-29 | 2018-08-17 | 华南理工大学 | A kind of automobile control arm impact test tooling |
| CN110006666A (en) * | 2019-04-28 | 2019-07-12 | 中国第一汽车股份有限公司 | Passenger car McPherson strut control arm assembly Bench Test System |
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