CN201811891U - Fatigue testing machine applicable to tension test piece - Google Patents
Fatigue testing machine applicable to tension test piece Download PDFInfo
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- CN201811891U CN201811891U CN2010205509392U CN201020550939U CN201811891U CN 201811891 U CN201811891 U CN 201811891U CN 2010205509392 U CN2010205509392 U CN 2010205509392U CN 201020550939 U CN201020550939 U CN 201020550939U CN 201811891 U CN201811891 U CN 201811891U
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- 238000009661 fatigue test Methods 0.000 title abstract description 8
- 238000006073 displacement reaction Methods 0.000 claims abstract description 29
- 210000003205 muscle Anatomy 0.000 claims description 19
- 238000013461 design Methods 0.000 abstract description 10
- 238000009864 tensile test Methods 0.000 abstract 1
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- 210000002435 tendon Anatomy 0.000 description 3
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Abstract
The utility model discloses a fatigue testing machine applicable to a tension test piece, which is mainly used for conducting tensile tests and tensile fatigue tests of mechanical parts. The testing machine comprises a fatigue force application mechanism, a pre-tightening force mechanism, a straightening roller mechanism, a test fixing frame, an auxiliary mechanism and a control system. A power system of the fatigue testing machine comprises the fatigue force application mechanism and the pre-tightening force mechanism, and tension output by the power system is redirected through the straightening roller mechanism and then transmitted to the tension test piece. The fatigue force application mechanism, the pre-tightening force mechanism, the straightening roller mechanism and the auxiliary mechanism of the fatigue testing machine are arranged on the test fixing frame. The utility model adopts hybrid pneumatic power and electric power as the power system of the fatigue testing machine, can master various parameters comprising the maximum average displacement, the minimum average displacement, the peak displacement, the maximum average tension, the minimum average tension, the minimum fatigue tension, the frequency, accumulated test times, accumulated test time, and the like, and provides a basis for optimized design of the tension test piece.
Description
Technical field
The utility model belongs to a kind of fatigue experimental device, particularly relates to the fatigue experimental device of tension test specimen.
Background technology
Along with improving constantly of Automobile Design level and manufacturing capacity, the stability of automobile also progressively improves, but inevitably, any a automobile all might break down, especially under steam, rest in the roadside if automobile breaks down, the towing hook on the bumper has just been brought into play its important effect at this moment.
If the intensity of bumper does not pass a test, the such a case of justing think, the trailer of front is in the process that the car that drags the back goes up a slope, and towing hook ruptures suddenly, and the car of back must be caused danger under situation about running out of steam; Add the place ahead car again in the process of turning, bumper is because hold and can't stand bigger centrifugal force and rupture, this afterwards the car of face will be thrown out of bend, this also is breakneck thing; Particularly outdoor offroad vehicle in case car mires down in mud, perhaps wants help in the time of just reaching great slope, and the existence of towing hook is just intuitively important, and requires higher to fatigue strength.Bumper fracture is a breakneck thing, front truck of ining succession of wire rope, and the other end is hard bumper, and this is tantamount to a meteor hammer and dances in the air aloft, and it is hardly imaginable to pound people's consequence, and this also is that cross-country car fans are afraid of occurrence most.
In addition, the use of bumper, between the crashproof intensity of the fatigue strength of bumper pair and bumper very large relation is arranged also, need a kind of experimental apparatus to simulate, further study the influence of the crashproof intensity of bumper then the fatigue of towing hook.
The security performance of bumper is a part very important in the automobile safety system, not only is related to bumper itself, simultaneously also with the intensity of bumper much relations is arranged.Yet for a long time, people consider the security performance shortcoming of the towing hook of bumper always, adopt the method for traditional increasing overstriking, the towing hook that then is by virtue of experience or calculates bumper designs, and the simple bumper fatigue test device that uses does not obtain promoting and general application.
And be an important indicator of modern designs the fatigue lifetime of product, because along with being growing more intense of market competition, the life-span of product seems more and more important concerning the user.In general, factors such as the mechanical property of tension component of machine and material, manufacturing process all have confidential relation, fatigue strength relates to material, mechanics and three conventional ambits of machinery, and all inequality with the classical mechanics method to life estimate from load statistics, stress analysis.Therefore, accurate Mechanics Calculation is very difficult and will spends considerable time with regard to giving comprehensively in the design phase, for rationality, the reliability that guarantees to design, just needs to revise design repetitive process repeatedly through design one model machine one.
Be noted that in addition the bionic pneumatic tendon is a kind of novel tension type executive component.It has broken through the air impeller acting with brand-new design concept must promote this traditional concept of piston by the gas medium fluid.Compare with traditional cylinder, cylinder have that parts such as cylinder barrel end cap are enclosed in piston, (or blade) piston rod, sealing but the bionic pneumatic tendon simple many it does not have all multiple components such as piston, piston rod, cylinder barrel, O-ring seal, compare with the cylinder that can produce equal force, its air consumption only is common cylinder 40%.Without any the mechanical component fricting movement that the motion of like cylinder piston produced that moves.Dynamic perfromance is superior during work, does not have crawl when impulse stroke is closed on terminal point, and the bionic pneumatic tendon produces the tensile force that is equivalent to 10 times in cylinder diameter cylinder after feeding pressurized air in the pipe.
Summary of the invention
The utility model purpose is to overcome the prior art deficiency, and a kind of fatigue tester that is applicable to the tension test specimen is provided.
Be applicable to the fatigue tester of tension test specimen, comprise tired force application mechanism, pretightning force mechanism, aligning idler wheel mechanism, test fixed mount, auxiliary body and control system; Tired force application mechanism comprises bearing, pneumatic muscle, connector, rear support stand, front support stand, wire rope, limited block, slide block, guide rail and sliding support plate, wherein: bearing is fixed on the sliding support plate, the rear end of pneumatic muscle is connected with bearing, the front end of pneumatic muscle is connected with connector, connector is connected with rear support stand, rear support stand is connected with the rear end of the pulling force sensor of control system, front support stand is connected with the front end of pulling force sensor, front support stand is connected with wire rope, the center of pneumatic muscle, the center of pulling force sensor and wire rope remain on same the straight line, sliding support plate is provided with a guide rail, the two ends of guide rail are provided with limited block, guide rail is provided with two slide blocks, front support stand is connected with slide block respectively with rear support stand, the lower surface of sliding support plate is fixed two slide blocks successively, two slide blocks be fixed on the guide rail that supports on the quarter bend and cooperate; Pretightning force mechanism comprises supporting seat behind supporting seat before the motor, motor bracing frame, internal tooth wheels, screw mandrel, screw mandrel, silk spiral shell and the screw mandrel, wherein: motor is fixed on the motor bracing frame, motor is connected with the internal tooth wheels, the internal tooth wheels are connected with screw mandrel, screw mandrel is installed in before the screw mandrel behind the supporting seat and screw mandrel on the supporting seat, the silk spiral shell is fixed on the lower surface of sliding support plate, and supporting seat and motor bracing frame are fixed on the fixed support plate of auxiliary body successively behind the preceding supporting seat of screw mandrel, the screw mandrel; Auxiliary body comprises fixed pulley, lifting rope, Weight plate, vertical T type groove flat board, T-slot test specimen installing plate, plate is slidingly installed, fixed support plate, dull and stereotyped and the support quarter bend of horizontal T type groove, wherein: an end of lifting rope connects T-slot test specimen installing plate, the other end connects Weight plate, lifting rope is on fixed pulley, vertically T type groove flat board is fixed on the test fixed mount, be slidingly installed plate on vertical T type groove flat board, the plate that is slidingly installed can slide on vertical T type groove flat board or be fixing, the aligning idler wheel mechanism is fixed on the fixed support plate, and fixed support plate can horizontally slip on horizontal T type groove flat board or be fixing; Control system comprises displacement transducer, temperature sensor, pulling force sensor, data collecting card, industrial computer and display; Wherein: displacement transducer is installed on the tension test specimen, temperature sensor is fixed near the gas outlet of pneumatic muscle, displacement transducer, temperature sensor and pulling force sensor are by cable and data acquisition card connection, and data collecting card is connected with industrial computer by cable with display.
The beneficial effect that the utility model compared with prior art the utlity model has is:
1) the utility model can be grasped numerous parameters such as maximum average displacement, minimum average B configuration displacement, peak displacement, maximum average pulling force, minimum average B configuration pulling force, minimum tired pulling force, frequency, accumulative total test number (TN) and accumulative total test period of tension test specimen, can also carry out data base administration to test parameters, for the optimal design of tension test specimen provides foundation.
2) owing to modern control technology and research technique, can get rid of artificial or natural disturbed condition, test specimen is carried out specific aim arrange testing program, make test objective clear and definite, directiveness, the reliability of test increase greatly;
3) can carry out two kinds of Experiments of Machanics to parts, comprise tired tension test and tensile strength test;
4) testing machine can carry out the mechanical test of space tension to test specimen;
5) test repeatability is strong, thereby has increased the comparability of test;
6) provide power source owing to abandoned traditional single motor and mechanical mechanism, adopt the power source of advanced pneumatic and electronic hybrid power system as fatigue tester, can save the space and the funds of test greatly like this, and shorten the lead time effectively.
Description of drawings
Fig. 1 is the front view of fatigue tester;
Fig. 2 is the tired force application mechanism of fatigue tester and the partial sectional view of pretightning force mechanism;
Fig. 3 is the vertical view of fatigue tester;
Fig. 4 is the left view of fatigue tester;
Fig. 5 is that the axle of fatigue tester is surveyed view;
Fig. 6 is the operational flow diagram of fatigue tester.
Among the figure, tired force application mechanism 1, pretightning force mechanism 2, aligning idler wheel mechanism 3, test fixed mount 4, auxiliary body 5, control system 6 bearings 11, pneumatic muscle 12, connector 13, rear support stand 14, front support stand 15, wire rope 16, limited block 17, slide block 18, guide rail 19, sliding support plate 110, motor 21, motor bracing frame 22, internal tooth wheels 23, supporting seat 24 before the screw mandrel, screw mandrel 25, silk spiral shell 26, supporting seat 27 behind the screw mandrel, fixed pulley 51, lifting rope 52, Weight plate 53, vertical T type groove flat board 54, T-slot test specimen installing plate 55, plate 56 is slidingly installed, fixed support plate 57, horizontal T type groove flat board 58, support quarter bend 59, displacement transducer 61, temperature sensor 62, pulling force sensor 63, data collecting card 64, industrial computer 65, display 66.
Embodiment
A kind of fatigue tester that is applicable to the tension test specimen comprises tired force application mechanism 1, pretightning force mechanism 2, aligning idler wheel mechanism 3, test fixed mount 4, auxiliary body 5 and control system 6.
Tired force application mechanism 1 comprises bearing 11, pneumatic muscle 12, connector 13, rear support stand 14, front support stand 15, wire rope 16, limited block 17, slide block 18, guide rail 19 and sliding support plate 110, wherein: bearing 11 is fixed on the sliding support plate 110, the rear end of pneumatic muscle 12 is connected with bearing 11, the front end of pneumatic muscle 12 is connected with connector 13, connector 13 is connected with rear support stand 14, rear support stand 14 is connected with the rear end of the pulling force sensor 63 of control system 6, front support stand 15 is connected with the front end of pulling force sensor 63, front support stand 15 is connected with wire rope 16, the center of pneumatic muscle 12, the center of pulling force sensor 63 and wire rope 16 remain on same the straight line, sliding support plate 110 is provided with a guide rail 19, the two ends of guide rail 19 are provided with limited block 17, guide rail 19 is provided with two slide blocks 18, front support stand 15 is connected with slide block 18 respectively with rear support stand 16, guide rail 19 on the lower surface of sliding support plate 110 is fixed 18, two slide blocks 18 of two slide blocks successively and is fixed on support quarter bend 59 cooperates.
Auxiliary body 5 comprises fixed pulley 51, lifting rope 52, Weight plate 53, vertical T type groove flat board 54, T-slot test specimen installing plate 55, plate 56 is slidingly installed, fixed support plate 57, horizontal T type groove dull and stereotyped 58 and support quarter bend 59, wherein: an end of lifting rope 52 connects T-slot test specimen installing plate 55, the other end connects Weight plate 53, lifting rope 52 is on fixed pulley 51, vertically T type groove flat board 54 is fixed on the test fixed mount 4, be slidingly installed plate 56 on vertical T type groove flat board 54, the plate 56 that is slidingly installed can slide on vertical T type groove flat board 54 or be fixing, aligning idler wheel mechanism 3 is fixed on the fixed support plate 57, and fixed support plate 57 can horizontally slip on horizontal T type groove flat board 58 or be fixing.
Control system 6 comprises displacement transducer 61, temperature sensor 62, pulling force sensor 63, data collecting card 64, industrial computer 65 and display 66; Wherein: displacement transducer 61 is installed on the tension test specimen, temperature sensor 62 is fixed near the gas outlet of pneumatic muscle 12, displacement transducer 61, temperature sensor 62 and pulling force sensor 63 are connected with data collecting card 64 by cable, and data collecting card 64 is connected with industrial computer 65 by cable with display 66; The output signal of displacement transducer 61, temperature sensor 62 and pulling force sensor 63 is connected to the A/D plate through amplification and carries out data acquisition; Industrial computer 65 reads and handles the data of collecting through data collecting card, and the data transmission after will handling is to display 66, and display 66 content displayed comprise displacement wave cardon, maximum average displacement, minimum average B configuration displacement, peak displacement, real-time displacement, pulling force wave pattern, maximum average pulling force, minimum average B configuration pulling force, minimum tired pulling force, real-time displacement, frequency, accumulative total test number (TN), accumulative total test period and pneumatic muscle temperature; Preset displacement warning value, pulling force warning value and temperature warning value in the control system 6, in process of the test, occur to satisfy in default three warning values any one the time, computing machine is reported to the police and the control air compressor machine quits work, the operator checks tension test specimen and fatigue tester, if crackle, off-test if crackle do not occur, is readjusted and is continued test behind the fatigue tester.
The fatigue test method of the tension test specimen of testing machine comprises the steps:
1) operator is installed in test specimen on the T-slot test specimen installing plate 55, adjusts T type groove flat board 54 and makes the tension test specimen carry out moving of Y direction on the test perpendicular, adjusts installing plate 56 and makes the tension test specimen carry out moving of X-direction on the test perpendicular;
2) operator adjusts the testing machine position: adjust horizontal T type groove flat board 58 and make the torture test main frame carry out moving of X-direction on the test water plane, obtain the pulling force angle of tension test specimen at last;
3) operator adjusts the aligning idler wheel mechanism, makes pulling force sensor 63 be subjected to the tensile force level of wire rope 16;
4) operator's starter motor gauge tap, motor 21 rotates and produces pretightning force;
5) operator starts the air compressor machine switch, and air compressor machine 67 drives pneumatic muscle 12 motions and produces tired pulling force;
6) image and the data of the displacement transducer 61 that collects on the video data capture card 65 on operator's monitor display 66, temperature sensor 62 and pulling force sensor 63, these images and data comprise displacement fluctuation figure, maximum average displacement, minimum average B configuration displacement, peak displacement, pulling force wave pattern, maximum average pulling force, minimum average B configuration pulling force, minimum tired pulling force, frequency, accumulative total test number (TN), accumulative total test period and pneumatic muscle temperature;
7) industrial computer 65 is reported to the police and after control air compressor machine 67 quit work, the operator checked tension test specimen and fatigue tester, if crackle, off-test if crackle do not occur, continues test after readjusting fatigue tester;
8) after the off-test, the experiment parameter of test specimen is preserved and data base administration.
Claims (1)
1. a fatigue tester that is applicable to the tension test specimen is characterized in that comprising tired force application mechanism (1), pretightning force mechanism (2), aligning idler wheel mechanism (3), test fixed mount (4), auxiliary body (5) and control system (6); Tired force application mechanism (1) comprises bearing (11), pneumatic muscle (12), connector (13), rear support stand (14), front support stand (15), wire rope (16), limited block (17), slide block (18), guide rail (19) and sliding support plate (110), wherein: bearing (11) is fixed on the sliding support plate (110), the rear end of pneumatic muscle (12) is connected with bearing (11), the front end of pneumatic muscle (12) is connected with connector (13), connector (13) is connected with rear support stand (14), rear support stand (14) is connected with the rear end of the pulling force sensor (63) of control system (6), front support stand (15) is connected with the front end of pulling force sensor (63), front support stand (15) is connected with wire rope (16), the center of pneumatic muscle (12), the center of pulling force sensor (63) and wire rope (16) remain on same the straight line, sliding support plate (110) is provided with a guide rail (19), the two ends of guide rail (19) are provided with limited block (17), guide rail (19) is provided with two slide blocks (18), front support stand (15) is connected with slide block (18) respectively with rear support stand (16), the lower surface of sliding support plate (110) is fixed two slide blocks (18) successively, two slide blocks (18) be fixed on the guide rail (19) that supports on the quarter bend (59) and cooperate; Pretightning force mechanism (2) comprises motor (21), motor bracing frame (22), internal tooth wheels (23), supporting seat (24) before the screw mandrel, screw mandrel (25), supporting seat (27) behind silk spiral shell (26) and the screw mandrel, wherein: motor (21) is fixed on the motor bracing frame (22), motor (21) is connected with internal tooth wheels (23), internal tooth wheels (23) are connected with screw mandrel (25), screw mandrel (25) is installed in before the screw mandrel behind the supporting seat (24) and screw mandrel on the supporting seat (27), silk spiral shell (26) is fixed on the lower surface of sliding support plate (110), supporting seat (24) before the screw mandrel, supporting seat behind the screw mandrel (27) and motor bracing frame (22) are fixed on the fixed support plate (57) of auxiliary body (5) successively; Auxiliary body (5) comprises fixed pulley (51), lifting rope (52), Weight plate (53), vertical T type groove flat board (54), T-slot test specimen installing plate (55), plate (56) is slidingly installed, fixed support plate (57), horizontal T type groove flat board (58) and support quarter bend (59), wherein: an end of lifting rope (52) connects T-slot test specimen installing plate (55), the other end connects Weight plate (53), lifting rope (52) is on fixed pulley (51), vertically T type groove flat board (54) is fixed on the test fixed mount (4), be slidingly installed plate (56) on vertical T type groove flat board (54), being slidingly installed plate (56) can be in vertically upward slip or fixing of T type groove flat board (54), aligning idler wheel mechanism (3) is fixed on the fixed support plate (57), and fixed support plate (57) can horizontally slip on horizontal T type groove flat board (58) or be fixing; Control system (6) comprises displacement transducer (61), temperature sensor (62), pulling force sensor (63), data collecting card (64), industrial computer (65) and display (66); Wherein: displacement transducer (61) is installed on the tension test specimen, temperature sensor (62) is fixed near the gas outlet of pneumatic muscle (12), displacement transducer (61), temperature sensor (62) and pulling force sensor (63) are connected with data collecting card (64) by cable, and data collecting card (64) is connected with industrial computer (65) by cable with display (66).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205509392U CN201811891U (en) | 2010-09-30 | 2010-09-30 | Fatigue testing machine applicable to tension test piece |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205509392U CN201811891U (en) | 2010-09-30 | 2010-09-30 | Fatigue testing machine applicable to tension test piece |
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| CN201811891U true CN201811891U (en) | 2011-04-27 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101957290A (en) * | 2010-09-30 | 2011-01-26 | 浙江大学 | Fatigue testing machine applied to tension test piece and method thereof |
| CN102661915A (en) * | 2012-04-28 | 2012-09-12 | 同济大学 | Impact rolling model tester and application thereof |
| CN103344504A (en) * | 2013-07-08 | 2013-10-09 | 上海华特汽车配件有限公司 | Sunshade plate mirror cover sliding fatigue test machine |
| CN103398842A (en) * | 2013-08-21 | 2013-11-20 | 常州星宇车灯股份有限公司 | Force application device for motor fatigue test |
| CN103837409A (en) * | 2014-03-14 | 2014-06-04 | 唐山轨道客车有限责任公司 | Pulse fatigue testing machine and fatigue testing device used by same |
| CN106066281A (en) * | 2016-05-25 | 2016-11-02 | 中国建材检验认证集团(陕西)有限公司 | A kind of hanging piece for stone combined earthquake-resistant rig for testing |
| CN110031203A (en) * | 2019-05-15 | 2019-07-19 | 哈尔滨电气股份有限公司 | A kind of experimental verification device of wheel disc crack propagation life |
-
2010
- 2010-09-30 CN CN2010205509392U patent/CN201811891U/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101957290A (en) * | 2010-09-30 | 2011-01-26 | 浙江大学 | Fatigue testing machine applied to tension test piece and method thereof |
| CN101957290B (en) * | 2010-09-30 | 2012-05-02 | 浙江大学 | Fatigue testing machine applied to tension test piece and method thereof |
| CN102661915A (en) * | 2012-04-28 | 2012-09-12 | 同济大学 | Impact rolling model tester and application thereof |
| CN103344504A (en) * | 2013-07-08 | 2013-10-09 | 上海华特汽车配件有限公司 | Sunshade plate mirror cover sliding fatigue test machine |
| CN103398842A (en) * | 2013-08-21 | 2013-11-20 | 常州星宇车灯股份有限公司 | Force application device for motor fatigue test |
| CN103837409A (en) * | 2014-03-14 | 2014-06-04 | 唐山轨道客车有限责任公司 | Pulse fatigue testing machine and fatigue testing device used by same |
| CN103837409B (en) * | 2014-03-14 | 2016-06-08 | 中车唐山机车车辆有限公司 | Testing pulse fatigue machine fatigue experimental device and testing pulse fatigue machine |
| CN106066281A (en) * | 2016-05-25 | 2016-11-02 | 中国建材检验认证集团(陕西)有限公司 | A kind of hanging piece for stone combined earthquake-resistant rig for testing |
| CN110031203A (en) * | 2019-05-15 | 2019-07-19 | 哈尔滨电气股份有限公司 | A kind of experimental verification device of wheel disc crack propagation life |
| CN110031203B (en) * | 2019-05-15 | 2021-07-27 | 哈尔滨电气股份有限公司 | Experimental verification device for service life of wheel disc crack propagation |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20110427 Effective date of abandoning: 20120502 |