CN102944431A - Body-in-white torsional fatigue testing system and method thereof - Google Patents
Body-in-white torsional fatigue testing system and method thereof Download PDFInfo
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- CN102944431A CN102944431A CN201210507036XA CN201210507036A CN102944431A CN 102944431 A CN102944431 A CN 102944431A CN 201210507036X A CN201210507036X A CN 201210507036XA CN 201210507036 A CN201210507036 A CN 201210507036A CN 102944431 A CN102944431 A CN 102944431A
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Abstract
The invention provides a body-in-white torsional fatigue testing system and a method thereof. The body-in-white torsional fatigue testing system comprises a constraint subsystem and a loading subsystem, wherein the constraint subsystem comprises a front shock absorber bearing rack for supporting a first end of a body-in-white and driving the body-in-white to generate torsion, and a rear shock absorber bearing rack for supporting a second end of the body-in-white; and the loading subsystem is used for loading the front shock absorber bearing rack so as to drive the body-in-white to generate the torsion. According to the body-in-white torsional fatigue testing system and the body-in-white torsional fatigue testing method provided by the invention, the fatigue state of the body-in-white of an automobile under a torsional working condition can be very easily and rapidly tested, including data such as fatigue life of metal plate and cracked welding spots; and the testing method on the torsional fatigue property of the body-in-white is substantially improved.
Description
Technical field
The present invention relates to automobile body-in-white panel beating and solder joint fatigue technical field of measurement and test, relate in particular to a kind of automobile body-in-white testing torsional fatigue system and method thereof.
Background technology
The fatigue durability of automobile body-in-white can be an important indicator estimating vehicle performance, also is simultaneously an important parameter weighing the automobile quality.Be proven, automobile body-in-white is sheet metal component and the easiest generation fatigue of solder joint under twisting conditions, when be lower than standard-required the fatigue lifetime of sheet metal component and solder joint, the phenomenon of the sheet metal component cracking will occur, stitch weldering, solder joint snapping, thereby reduced the serviceable life of automobile, and also there is serious hidden danger in driver's life security.Therefore, automobile body-in-white torsional fatigue performance is to estimate the important indicator of vehicle designed reliability and vehicle security energy etc., and analyzing for the torsional fatigue of automobile body-in-white then becomes one of requisite key link in car load development and Design process.
Summary of the invention
The object of the present invention is to provide a kind of body in white testing torsional fatigue system and method thereof, can carry out quickly and easily the body in white testing torsional fatigue of automobile.
In order to achieve the above object, technical scheme provided by the present invention is as follows:
A kind of body in white testing torsional fatigue system comprises:
One constraint subsystem comprises that one is used for the first end of body in white is supported, and can drive front damper seat stand frame and that described body in white twists and be used for the rear shock absorber seat stand frame that the second end to body in white supports; And,
One is used for loading the loading subsystem that twists to drive described body in white to described front damper seat stand frame.
Preferably, described front damper seat stand frame comprises:
Be used for being flexibly connected with the first end of body in white, and at least two the first simulated suspensions that the first end of described body in white is supported, wherein an end of at least two described the first simulated suspensions is movably connected on respectively the both sides of the first end of body in white;
One is fixed in the rigid support of work top;
And one is used for swinging in described YZ plane take described rigid support as fulcrum, and the first end that drives described the first simulated suspension drive body in white swings in described YZ plane, thereby so that the swing arm that described body in white twists;
Wherein, described swing arm is arranged on the described work top along Y direction, the other end of at least two described the first simulated suspensions is movably connected on the two ends of described swing arm, and described rigid support is arranged at the middle part of described swing arm, and described YZ plane is perpendicular to described work top.
Preferably, described rear shock absorber seat stand frame comprises:
Be used for being flexibly connected with the second end of body in white, and at least two the second simulated suspensions that the second end of described body in white is supported, at least two described the second simulated suspensions are movably connected on respectively the both sides of the second end of described body in white;
Be fixed in the support member that is used for supporting described the second simulated suspension on the described work top, an end is connected with described the second simulated suspension, and the other end is fixedly arranged on described work top.
Preferably, described support member comprises:
One is used for described the second simulated suspension is played main supporting role, and can carry out the highly main support rod of adjusting, and an end is connected with described the second simulated suspension, and the other end is fixedly arranged on the described work top; And,
Be used for described the second simulated suspension is played the supplemental support effect, and can carry out highly at least three auxiliary support bars of adjusting, one end of at least three auxiliary support bars is movably connected on described the second simulated suspension, the other end is supported on the described work top, and at least three described auxiliary support bars form a umbrella shaped support shelf structure along the periphery that circumferentially is distributed in described main support rod of described main support rod.
Preferably, described loading subsystem comprises:
One is used at least one end imposed load to described swing arm, the charger that swings in described YZ plane take described rigid support as fulcrum to drive described swing arm, and it is connected with at least one end of described swing arm;
And one is used to described charger that the propulsion system of power are provided, and is connected with described charger.
Preferably, described propulsion system comprise a hydropress for being used for by the hydraulic control device of the described charger of hydrostatic control to described swing arm imposed load;
Described charger comprises that one is used under the hydrostatic control of described hydraulic control device, the edge is perpendicular to the direction to-and-fro movement on the surface of described work top, with the hydraulic stem to described swing arm imposed load, described hydraulic stem is along the direction setting perpendicular to described work top, the one end is connected with the output shaft of described hydropress, and the other end is connected in an end of described swing arm.
Preferably, described loading subsystem comprises that also one is used for adjusting the power-regulating device that described hydraulic stem puts on the size of the load in the described swing arm, is arranged between described PTO and the described charger.
Preferably, described body in white testing torsional fatigue system also comprises:
Be used for gathering the harvester of the swing displacement information of the first end of the number of torsions information of described body in white and described body in white and the second end, be arranged at the end that is flexibly connected with described body in white of being used for that is used for the end that is flexibly connected with described body in white and described rear shock absorber seat stand frame of described front damper seat stand frame; And,
One is used for obtaining described number of torsions information that described harvester gathers and the deriving means of described swing displacement information, is connected with described harvester.
In order to reach above-mentioned present, the present invention also provides a kind of body in white testing torsional fatigue method, and described method comprises the steps:
Steps A. body in white is arranged in the above-mentioned body in white testing torsional fatigue system, wherein, uses the first end of the described body in white of described front damper seat stand frame support and connection, and use described rear shock absorber seat stand frame to connect and retrain the second end of described body in white;
Step B. uses described loading subsystem that described body in white is loaded, and carry out the collection of actual test data, wherein, described actual test data comprises the actual number of torsions information of described body in white, the actual swing displacement information of front and back shock absorber bearing, real load size and the actual test duration that applies;
Step C. sets up the sheet metal component of body in white and the default test data that solder joint reaches the testing torsional fatigue standard, and described actual test data and default test data are compared, and analyzes with the torsional fatigue performance to described body in white.
Beneficial effect of the present invention is as follows:
Body in white testing torsional fatigue system provided by the present invention and body in white testing torsional fatigue method, can be very easy to, test out quickly the fatigue conditions of body in white under twisting conditions of automobile, the data such as fatigue lifetime that comprise panel beating and solder joint cracking, it has substantially improved body in white torsional fatigue performance test method, compare other existing method of testing, the present invention has realized quite significant novelty improvement in all many-sides such as the collection that retrains processing, load applying position and method, test data and judgements.
Description of drawings
Fig. 1 represents the structural representation of body in white testing torsional fatigue system when the installing body in white among a kind of embodiment provided by the present invention.
Embodiment
Below in conjunction with accompanying drawing principle of the present invention and feature are described, institute gives an actual example and only is used for explaining the present invention, is not be used to limiting scope of the present invention.
Body in white testing torsional fatigue provided by the present invention system mainly comprises the constraint subsystem and loads this two large ingredient of subsystem, wherein, the constraint subsystem mainly is the function that realizes body in white is carried out the locus constraint, and loads the subsystem realization to the function of body in white imposed load.
Particularly, as shown in Figure 1, the constraint subsystem in the body in white testing torsional fatigue system that provides in the present embodiment comprises:
One front damper seat stand frame 200 is used for the first end of body in white 100 is supported, and can drive body in white 100 and twist; And,
One rear shock absorber seat stand frame 300 is used for the second end of body in white 100 is supported.
And as shown in Figure 1, the loading subsystem in the body in white testing torsional fatigue system that provides in the present embodiment is used for, twisting and drive body in white 100 to realize to body in white 100 imposed loads by forward shock absorber bearing stand 200 loadings.
Before the body in white testing torsional fatigue system that provides in to present embodiment describes, first a rectangular coordinate system in space related in this instructions is described.Please refer to Fig. 1, X-direction, Y direction and Z-direction are set to consistent with directions X, Y-direction and the Z direction of common cognitive body in white 100 in this area in the related rectangular coordinate system in space in the present embodiment, wherein, Z-direction and YZ plane are all perpendicular with the work top 10 of this body in white testing torsional fatigue system, and the XY plane is parallel with this work top 10.This work top 10 can be floor or experiment table top etc.
Below with a concrete preferred embodiment the present invention is described.In the body in white testing torsional fatigue system that provides in the present embodiment, preferred, as shown in Figure 1, front damper seat stand frame 200 comprises the first simulated suspension 201, swing arm 202 and rigid support 203, wherein,
The first simulated suspension 201 is used for the first end of body in white 100 is supported, the first simulated suspension 201 preferably is set to two, one end of each the first simulated suspension 201 is flexibly connected by the first end of ball pivot (scheming not shown) with body in white 100, and two the first simulated suspensions 201 lay respectively at the both sides of the first end of body in white 100;
The effect that the first simulated suspension 201 is supported is played in rigid support 203 and swing arm 202, wherein rigid support 203 is rigidly secured on the work top 10, and rigid support 203 is movably connected in the middle part of swing arm 202, swing arm 202 is arranged on the work top 10 along the Y direction under the rectangular coordinate system in space shown in Figure 1, and swing arm 202 can be when loading the subsystem imposed load, swing in the YZ plane take rigid support 203 as fulcrum under rectangular coordinate system in space shown in Figure 1, the other end of two the first simulated suspensions 201 (end that does not namely connect body in white 100) then is connected to respectively the two ends of swing arm 202 by articulated manner, thereby, when loading subsystem to swing arm 202 imposed load, swing arm 202 swings in the YZ plane take rigid support 203 as fulcrum, two the first simulated suspensions 201 that are connected to swing arm 202 two ends then can be under swing arm 202 drives, also in the YZ plane, move, thereby the first end that drives body in white 100 swings in the YZ plane, has realized namely that also body in white 100 twists.
In addition, need to prove that in the present embodiment, rigid support 203 preferably is constructed to a triangular supports structure.Certainly, the shape of this rigid support 203 is not limited at this, in actual applications, this rigid support 203 also can be constructed to other shapes.Adopt the rigid support 203 of this triangular supports structure and the fit structure of swing arm 202, simple in structure, firm, easy to operate.In addition, rigid support 203 preferably adopts a turning axle (scheming not shown) to be connected with described swing arm 202, so that described swing arm 202 can around described turning axle at the YZ Plane Rotation, that is, be rotated take described rigid support as fulcrum on the YZ plane.
In addition, in the present embodiment, preferably, as shown in Figure 1, swing arm 202 is provided with a plurality of lightening holes 2021, is used for alleviating swing arm 202 own wts.
In addition, in the body in white testing torsional fatigue system that provides in the present embodiment, preferred, as shown in Figure 1, rear shock absorber seat stand frame 300 comprises the second simulated suspension 301 and support member;
Wherein, the second simulated suspension 301 is used for the second end of body in white 100 is supported, the second simulated suspension 301 is set to two usually, and two the second simulated suspensions 301 are movably connected on respectively the both sides of the second end of body in white 100 by ball pivot (scheming not shown);
Support member is used for supporting the second simulated suspension 301, and an end of support member is connected with the second simulated suspension 301, and the other end is fixedly arranged on the work top 10 by rigidity.
In addition, because body in white 100 weight are larger, in order to increase this constraint subsystem to the steadiness of the locus constraint of body in white 100, in the present embodiment, preferred, this support member is set to comprise the structure of main support rod 302 and auxiliary support bar 303, wherein, main support rod 302 is used for the second simulated suspension 301 is played main supporting role, and the one end is connected with the second simulated suspension 301, and other end rigidity is fixedly arranged on the work top 10; And auxiliary support bar 303 is set to three usually, be used for the second simulated suspension 301 is played the supplemental support effect, one end of three auxiliary support bars 303 is connected in the neck of the second simulated suspension 301, the other end is supported on the work top 10, and three auxiliary support bars 303 form a umbrella shaped support shelf structure along the periphery that circumferentially is distributed in main support rod 302 of main support rod 302.The support member of said structure, because it is set to the structure of a similar tripod, steadiness obviously improves.
In addition, preferred in the present embodiment, be movable connection method between three auxiliary support bars 303 and the second simulated suspension 301, and main support rod 302 and auxiliary support bar 303 are the rod shaped structure that highly can regulate.Adopt such scheme, support member can be in the body in white 100 of moving automobile not the height of the rear shock absorber seat stand frame 300 of the body in white 100 of vehicles quickly and easily, be fixed at the body in white 100 of automobile after the structure of front damper seat stand frame 200, rear shock absorber seat stand frame 300 and can also have finely tuned the height of the body in white 100 of automobile, so the leveling of automobile body-in-white 100 is had extraordinary convenience; In addition, three auxiliary support bars 303 can be a umbrella shaped support shelf structure and support when needed, when not required, fold up.
Need to prove, in the present embodiment, the quantity of the first simulated suspension 201, the second simulated suspension 301 and auxiliary support bar 303 do not limited.
In addition, in the body in white testing torsional fatigue system that provides in the present embodiment, preferred, as shown in Figure 1, this loading subsystem comprises:
One is used for the end imposed load to swing arm 202, the charger 401 that swings in the YZ plane take rigid support 203 as fulcrum to drive swing arm 202, and it is connected with an end of swing arm 202;
And one is used to charger 401 that the propulsion system 402 of power are provided, and is connected with charger 401.
In the present embodiment, preferred, these propulsion system 402 adopt hydraulic control device, and it comprises a hydropress, and charger 401 comprises a hydraulic stem, and an end of this hydraulic stem is connected with the output shaft of this hydropress, and the other end is connected in an end of swing arm 202.Such scheme, when needs carry out testing torsional fatigue to body in white 100, hydropress in the hydraulic control device drives hydraulic stem along the direction to-and-fro movement perpendicular to work top 10, hydraulic stem is namely to an end imposed load of swing arm 202, driving swing arm 202 swings in the YZ plane take rigid support 203 as fulcrum, thereby form the loading to two the first simulated suspensions 201 on the front damper seat, and then so that load be delivered on two the first simulated suspensions 201, and even whole body in white 100.
In addition, preferred in the present embodiment, this loading subsystem can also comprise that one is used for adjusting the power-regulating device that hydraulic stem puts on the size of the load in the swing arm 202, is arranged between hydropress and the hydraulic stem.Thus, in testing body in white 100, reality can control magnitude of load, to reach test purpose.
In addition, the body in white testing torsional fatigue system that present embodiment provides also comprises harvester and deriving means, wherein, harvester can adopt the sensor (not shown) that is used for the end place that is flexibly connected with body in white 100 that is used for the end that is flexibly connected with body in white 100 and rear shock absorber seat stand frame 300 that is arranged at front damper seat stand frame 200 to realize, be used for to gather the harvester of the swing displacement information of the first end of the number of torsions information of body in white 100 and body in white 100 and the second end, and with its number of torsions information that gathers and swing displacement information and be converted into digital signal and send to deriving means, this deriving means can be computer etc., so that the data in tester's Real-time Obtaining test process, and test process monitored.
A kind of method of the torsional fatigue performance of body in white 100 being tested based on body in white testing torsional fatigue of the present invention system below is provided.
Particularly, the method comprises the steps:
Steps A. body in white 100 is arranged in the above-mentioned body in white testing torsional fatigue system, wherein, uses the first end of front damper seat stand frame 200 support and connection body in whites 100, and use rear shock absorber seat stand frame 300 to connect and retrain the second end of body in white 100;
Step B. uses the loading subsystem that body in white 100 is loaded, and carry out the collection of actual test data, wherein, actual test data comprises the actual number of torsions information of body in white 100, the actual swing displacement information of front and back shock absorber bearing, the real load size that applies and actual test duration etc.;
Step C. sets up the sheet metal component of body in white 100 and the default test data that solder joint reaches the testing torsional fatigue standard, and default test data can comprise default number of torsions information, default swing displacement information, the default magnitude of load that applies and default test duration etc.; Again actual test data and default test data are compared, analyze with the torsional fatigue performance to body in white 100.
In the present embodiment, step C realizes in the following manner:
Suppose the default number of torsions information in the default test data, the default displacement information that swings, the default default magnitude of load that applies respectively with actual number of torsions information, the actual swing displacement information of front and back shock absorber bearing, the real load size that applies is identical, so when the actual test duration equals the default test duration, the controlled loading subsystem stops to body in white 100 imposed loads, whether the sheet metal component and the solder joint that check body in white 100 this moment ftracture, check the degree of sheet metal component and solder joint cracking etc., and in time make relative recording, if the sheet metal component of body in white 100 and solder joint cracking, and the degree of panel beating plate and solder joint cracking exceeds the criterion of acceptability of body in white 100, and then the torsional fatigue performance of body in white 100 haves much room for improvement; If panel beating plate and the solder joint of body in white 100 do not ftracture, perhaps, the sheet metal component of body in white 100 and solder joint cracking, but the degree of panel beating plate and solder joint cracking does not exceed the criterion of acceptability of body in white 100, the then torsional fatigue sexual satisfaction requirement of body in white 100.
Comprehensively above-mentioned, body in white provided by the present invention 100 torque fatigue test systems, by adopting the improvement design of novelty, versatility is splendid and be applicable to the test needs of different automobile types fully; And can be very easy to, measure quickly the fatigue conditions of automobile body-in-white 100 under twisting conditions, the data such as fatigue lifetime that comprise panel beating and solder joint cracking, it has substantially improved the method for testing of body in white 100 torsional fatigues, compare other existing method of testing, the present invention has realized quite significant novelty improvement in all many-sides such as the collection that retrains processing, load applying position and method, test data and judgements.
The above is preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from principle of the present invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (10)
1. a body in white testing torsional fatigue system is characterized in that, comprising:
One constraint subsystem comprises that one is used for the first end of body in white is supported, and can drive front damper seat stand frame and that described body in white twists and be used for the rear shock absorber seat stand frame that the second end to body in white supports; And,
One is used for loading the loading subsystem that twists to drive described body in white to described front damper seat stand frame.
2. body in white testing torsional fatigue according to claim 1 system is characterized in that,
Described front damper seat stand frame comprises:
Be used for being flexibly connected with the first end of body in white, and at least two the first simulated suspensions that the first end of described body in white is supported, wherein an end of at least two described the first simulated suspensions is movably connected on respectively the both sides of the first end of body in white;
One is fixed in the rigid support of work top;
And one is used for swinging in described YZ plane take described rigid support as fulcrum, and the first end that drives described the first simulated suspension drive body in white swings in described YZ plane, thereby so that the swing arm that described body in white twists;
Wherein, described swing arm is arranged on the described work top along Y direction, the other end of at least two described the first simulated suspensions is movably connected on the two ends of described swing arm, and described rigid support is arranged at the middle part of described swing arm, and described YZ plane is perpendicular to described work top.
3. body in white testing torsional fatigue according to claim 1 system is characterized in that,
Described rear shock absorber seat stand frame comprises:
Be used for being flexibly connected with the second end of body in white, and at least two the second simulated suspensions that the second end of described body in white is supported, at least two described the second simulated suspensions are movably connected on respectively the both sides of the second end of described body in white;
Be fixed in the support member that is used for supporting described the second simulated suspension on the described work top, an end is connected with described the second simulated suspension, and the other end is fixedly arranged on described work top.
4. body in white testing torsional fatigue according to claim 3 system is characterized in that,
Described support member comprises:
One is used for described the second simulated suspension is played main supporting role, and can carry out the highly main support rod of adjusting, and an end is connected with described the second simulated suspension, and the other end is fixedly arranged on the described work top; And,
Be used for described the second simulated suspension is played the supplemental support effect, and can carry out highly at least three auxiliary support bars of adjusting, one end of at least three auxiliary support bars is movably connected on described the second simulated suspension, the other end is supported on the described work top, and at least three described auxiliary support bars form a umbrella shaped support shelf structure along the periphery that circumferentially is distributed in described main support rod of described main support rod.
5. body in white testing torsional fatigue according to claim 2 system is characterized in that,
Described loading subsystem comprises:
One is used at least one end imposed load to described swing arm, the charger that swings in described YZ plane take described rigid support as fulcrum to drive described swing arm, and it is connected with at least one end of described swing arm;
And one is used to described charger that the propulsion system of power are provided, and is connected with described charger.
6. body in white testing torsional fatigue according to claim 5 system is characterized in that,
Described propulsion system comprise a hydropress for being used for by the hydraulic control device of the described charger of hydrostatic control to described swing arm imposed load;
Described charger comprises that one is used under the hydrostatic control of described hydraulic control device, the edge is perpendicular to the direction to-and-fro movement on the surface of described work top, with the hydraulic stem to described swing arm imposed load, described hydraulic stem is along the direction setting perpendicular to described work top, the one end is connected with the output shaft of described hydropress, and the other end is connected in an end of described swing arm.
7. body in white testing torsional fatigue according to claim 6 system is characterized in that,
Described loading subsystem comprises that also one is used for adjusting the power-regulating device that described hydraulic stem puts on the size of the load in the described swing arm, is arranged between described PTO and the described charger.
8. body in white testing torsional fatigue according to claim 1 system is characterized in that,
Described body in white testing torsional fatigue system also comprises:
Be used for gathering the harvester of the swing displacement information of the first end of the number of torsions information of described body in white and described body in white and the second end, be arranged at the end that is flexibly connected with described body in white of being used for that is used for the end that is flexibly connected with described body in white and described rear shock absorber seat stand frame of described front damper seat stand frame; And,
One is used for obtaining described number of torsions information that described harvester gathers and the deriving means of described swing displacement information, is connected with described harvester.
9. a body in white testing torsional fatigue method is characterized in that described method comprises the steps:
Steps A. body in white is arranged in as in each described body in white testing torsional fatigue system of claim 1 to 8, wherein, use the first end of the described body in white of described front damper seat stand frame support and connection, and use described rear shock absorber seat stand frame to connect and retrain the second end of described body in white;
Step B. uses described loading subsystem that described body in white is loaded, and carry out the collection of actual test data, wherein, described actual test data comprises the actual number of torsions information of described body in white, the actual swing displacement information of front and back shock absorber bearing, real load size and the actual test duration that applies.
10. body in white testing torsional fatigue method according to claim 9 is characterized in that, can also may further comprise the steps behind the described step B:
Step C. sets up the sheet metal component of body in white and the default test data that solder joint reaches the testing torsional fatigue standard, and described actual test data and default test data are compared, and analyzes with the torsional fatigue performance to described body in white.
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| WO2015014113A1 (en) * | 2013-07-29 | 2015-02-05 | 北汽福田汽车股份有限公司 | Car body rigidity test apparatus |
| CN105136479A (en) * | 2015-09-29 | 2015-12-09 | 中国汽车工程研究院股份有限公司 | Implementation method and implementation device for frontal crash test on body-in-white vehicle |
| CN106706330A (en) * | 2015-11-13 | 2017-05-24 | 北汽福田汽车股份有限公司 | Body-in-white torsional stiffness test mechanism and test stand |
| CN108020429A (en) * | 2017-11-28 | 2018-05-11 | 中国汽车工程研究院股份有限公司 | Ordinary passenger car white body torsion stiffness loading device for testing |
| CN109781438A (en) * | 2019-02-20 | 2019-05-21 | 浙江吉利汽车研究院有限公司 | Vehicle body fatigue experimental device and test method |
| CN110779734A (en) * | 2019-11-28 | 2020-02-11 | 天津卡达克数据有限公司 | Test bench for evaluating intelligent driving auxiliary function of whole vehicle |
| CN110873648A (en) * | 2018-09-04 | 2020-03-10 | 宝沃汽车（中国）有限公司 | Connecting device for body-in-white performance test |
| CN112903219A (en) * | 2021-01-20 | 2021-06-04 | 东风商用车有限公司 | Body-in-white rigidity test fixture |
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