CN105181481A - Three-point bending fatigue testing machine - Google Patents
Three-point bending fatigue testing machine Download PDFInfo
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- CN105181481A CN105181481A CN201510661464.1A CN201510661464A CN105181481A CN 105181481 A CN105181481 A CN 105181481A CN 201510661464 A CN201510661464 A CN 201510661464A CN 105181481 A CN105181481 A CN 105181481A
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Abstract
The invention provides a three-point bending fatigue testing machine which comprises an alternating current servo motor, a rotary table, a bearing, a transmission device, a guide rail, a spring sleeve assembly, a force sensor, a pressing head, a fixture and a test bench bed. The alternating current servo motor is fixedly arranged on the test bench bed and connected with the transmission device through the rotary table. One end of the transmission device is sleeved with the bearing, and the other end of the transmission device is connected with the spring sleeve assembly. The spring sleeve assembly is fixedly connected with the force sensor through bolts. The other side of the force sensor is fixedly connected with the pressing head through bolts. The fixture is fixedly arranged on the test bench bed and can be manually adjusted to be folded and unfolded and lifted. The three-point bending fatigue testing machine is simple in structure, low in cost and capable of conducting three-point bending fatigue tests according to different specifications, the pre-applied force and the loading amplitude are freely adjusted, a loading mode of high frequency can be met, and practicability is high.
Description
Technical field
The present invention relates to a kind of testing machine, particularly relate to a kind of three-point bending fatigue tester, belong to checkout equipment technical field.
Background technology
In construction material application, generally can test its mechanical property.Except the mechanical property of routine, the fatigue behaviour of material is also its very important index, material or component repeated or alternate load effect time, although load amplitude is much smaller than its tensile strength or yield strength suffered by material or component, even be less than elastic load, but through distortion accumulation repeatedly, the final rupture failure that occurs is normally caused by fatigue load, the physical construction of about 50 ~ 90% is destroyed according to statistics is all belong to fatigure failure, and the phenomenon of fatigure failure is very extensive.
At present, the three-point bending fatigue tester researched and developed both at home and abroad, most volume is excessive, expensive, and device structure is complicated, cannot adjust loading amplitude and pre-tension simultaneously.
Summary of the invention
The object of the invention is in order to the deficiency for existing three-point bending testing fatigue technology and a kind of three-point bending fatigue tester is provided.
The object of the present invention is achieved like this: base plate, upper plate and four support columns for connecting bottom board and upper plate form testing bed, testing stand, upper plate is provided with AC servo motor, AC servo motor output terminal is fixed with rotating disk, rotating disk is provided with groove, in groove, slide block is installed, slide block is provided with bearing by bolt, bearing outer ring is provided with the first drive link, the end of the first drive link is hinged with the second drive link, second drive link is provided with and holds out against nut, fixed mount is provided with between second drive link and two support columns, the end of the second drive link stretches in spring spool assembly, described spring spool assembly comprises the first sleeve, second sleeve and spring, described first sleeve and the second sleeve and the second drive link concentric are installed, described spring is arranged in the first sleeve and the second sleeve, and the upper end of spring with hold out against nut and contact, the end of the second sleeve is fixed with force snesor, the end of force snesor is provided with pressure head, described base plate is provided with fixture, fixture is provided with the sample contacted with pressure head.
The present invention also comprises some architectural features like this:
1. described in, groove coboundary has scale value, and slide block upper side edge has central groove.
Compared with prior art, the invention has the beneficial effects as follows: a kind of three-point bending fatigue tester structure disclosed by the invention is simple, cost is lower, utilize AC Servo Motor Control rotating speed, utilize slide block and rotating disk to coordinate controlled loading amplitude, utilize spring spool assembly to control pre-tension, three-point bending torture test can be carried out for the sample of different size, free adjustment pre-tension and loading amplitude, and the loading mode of upper frequency can be met, practicality is stronger.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is the structural representation of gearing of the present invention;
Fig. 3 is the structural representation of spring spool assembly of the present invention.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the present invention is described in further detail.
The present invention relates to checkout equipment technical field, the three-point bending fatigue behaviour being mainly applicable to sample detects, and the three-point bending fatigue behaviour particularly relating to the loading mode of the upper frequency (30 ~ 300Hz) of adjustable loading condition detects.
The object of the invention is to the deficiency for existing three-point bending testing fatigue technology, a kind of three-point bending fatigue tester is provided, the volume solving current three-point bending torture test existence is excessive, expensive, device structure is complicated, cannot carry out the problem such as adjusting to loading amplitude and pre-tension simultaneously.A kind of three-point bending fatigue tester structure of the present invention is simple, cost is lower, can carry out three-point bending torture test for the sample of different size, free adjustment pre-tension and loading amplitude, and the loading mode of upper frequency (30 ~ 300Hz) can be met, practicality is stronger.
For achieving the above object, a kind of three-point bending fatigue tester disclosed by the invention, comprises AC servo motor, rotating disk, slide block, bearing, gearing, guide rail, spring spool assembly, pressure transducer, pressure head, fixture and testing bed, testing stand.AC servo motor is fixedly mounted on testing bed, testing stand, and AC servo motor is connected with gearing by rotating disk, gearing one end is enclosed within bearing place, the other end is connected with spring spool assembly, spring spool assembly is fixedly connected with force snesor by bolt, force snesor opposite side is fixedly connected with pressure head by bolt, and described fixture is fixedly mounted on testing bed, testing stand, and manually can adjust opening and closing and the lifting of fixture.
When carrying out three-point bending torture test, the opening and closing of adjustment fixture and lifting, be arranged on by sample in the middle of fixture and pressure head, form three-point bending clamp position, then the distance at adjusting slider and center of turntable place loads amplitude to adjust, regulate pre-load nut to adjust pre-tension, after starting AC servo motor, AC servo motor drives rotating disk, driven by rotary disc gearing, gearing band dynamic head completes and loads the fatigue and cyclic load of sample, carries out three-point bending torture test.
In technique scheme, wherein, AC servo motor to be connected with rotating disk by key and rotating disk can with AC servo motor axis of rotation, rotating disk has groove, and has scale value at groove coboundary, and slide block is arranged on rotating disk groove place, and can slide along rotating disk groove, slide block upper side edge has central groove, and slide block can regulate loading amplitude when rotating disk groove slides, and can be read and specifically loaded amplitude by slide block central authorities' groove and rotating disk groove coboundary scale value.Its beneficial effect is, adopt AC servo motor as power source, can apply the large load of high-frequency (30 ~ 300Hz) of stabilized (steady-state) speed, be convenient to regulating and controlling rotating speed, and test loading amplitude can be regulated by slide block and directly be read by rotating disk scale.
Described bearing is cylinder roller bearing, is connected with slide block by bolt, once after determining to load amplitude, need this bolt fastening to play the effect of fastening slide block and rotating disk, slide block is connected with gearing by bearing.Its beneficial effect is, adopt cylinder roller bearing to connect rotating disk and gearing, effectively can reduce the friction between slide block and the first drive link, to reduce the fever phenomenon of testing machine, the stability of three-point bending fatigue loading operating mode can be heightened, improve the serviceable life of testing machine.
Gearing is made up of the first drive link and the second drive link, and first drive link one end is enclosed within bearing, and the other end is connected with the second drive link by bolt; Second drive link middle and upper part cover has guide rail, and guide rail and spring spool assembly jointly limit and the second drive link is only vertically moved, and there is pre-load nut the second drive link middle and lower part, the upper end of pre-load nut restraining spring.Its beneficial effect is, can carry out the crush of regulating spring, reaching the effect of adjustment pre-tension by regulating pre-load nut, and the reading of pre-tension can be read by force sensor measuring.
Spring spool assembly is made up of spring, the first sleeve and the second sleeve, spring, the first sleeve and the second sleeve are installed with the second drive link is concentric successively, spring upper end contacts with the pre-load nut of the second drive link middle and lower part, the combination of the first sleeve and the second sleeve can limit the maximal value of the second drive link stroke, and the second sleeve lower end is fixedly connected with force snesor by bolt; Force snesor is fixedly connected with pressure head by bolt, and pre-tension reading can be read by force sensor measuring; Pressure head contacts with in the middle part of sample, jointly realizes with fixture the effect clamping sample, implements three-point bending fatigue loading to test specimen.
Fixture is arranged on the base plate of testing bed, testing stand, and has and manually can adjust the opening and closing of fixture and the function of lifting, carries out testing and loading and unloading sample with the sample adapting to different size; Testing bed, testing stand is made up of base plate, four support columns and upper plate, and base plate is connected by four support columns with upper plate, and guide rail fixed installation is wherein on two support columns, and AC servo motor is arranged on the upper plate of testing bed, testing stand.Certainly, other structures also can be adopted to realize the fixed installation of guide rail and AC servo motor.
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with accompanying drawing, the present invention will be described in detail.Should be appreciated that the detail set forth in the following description is only in order to fully to explain the present invention, is not intended to limit the present invention.
Composition graphs 1, Fig. 2 and Fig. 3, wherein Fig. 1 is this three-point bending fatigue tester structural representation, and Fig. 2 is transmission structures schematic diagram, and Fig. 3 is spring spool assemble cross-section.As shown in Fig. 1,2,3, a kind of three-point bending fatigue tester of the present invention, comprises AC servo motor 1, rotating disk 2, slide block 3, bearing 4, gearing 5, fixed mount 6, spring spool assembly 7, force snesor 8, pressure head 9, fixture 10 and testing bed, testing stand 11.
All parts of the present invention are all arranged on testing bed, testing stand 11.
When carrying out three-point bending torture test, the opening and closing of adjustment fixture and lifting, be arranged on by sample in the middle of fixture and pressure head, form three-point bending clamp position, then the distance at adjusting slider and center of turntable place loads amplitude to adjust, regulate pre-load nut to adjust pre-tension, after starting AC servo motor, AC servo motor drives rotating disk, driven by rotary disc gearing, gearing band dynamic head completes and loads the fatigue and cyclic load of sample, carries out three-point bending torture test.
Described AC servo motor 1 to be connected with rotating disk 2 by key and rotating disk 2 can with AC servo motor 1 axis of rotation.Adopt AC servo motor 1 as power source, the large load of high-frequency 30 ~ 300Hz of stabilized (steady-state) speed can be applied, be convenient to regulating and controlling rotating speed.
Described rotating disk 2 has groove, and have scale value at groove coboundary, described slide block 3 is arranged on rotating disk 2 groove place, and can slide along rotating disk 2 groove, slide block 3 upper side edge has central groove, slide block 3 can regulate loading amplitude when rotating disk 2 groove slides, and can be read by the central groove of slide block 3 and rotating disk 2 groove coboundary scale value and specifically load amplitude.
Described bearing 4 is cylinder roller bearing, be connected with slide block 3 by bolt, once after determining to load amplitude, need this bolt fastening to play the effect of fastening slide block 3 and rotating disk 2, slide block 3 is connected with gearing 5 by bearing 4, adopts cylinder roller bearing to connect rotating disk 2 and gearing 5, effectively can reduce the friction between slide block 3 and the first drive link 5.1, to reduce the fever phenomenon of testing machine, the stability of three-point bending fatigue loading operating mode can be heightened, improve the serviceable life of testing machine.
As shown in Figure 2, described gearing 5 is made up of the first drive link 5.1 and the second drive link 5.2.Wherein, described first drive link 5.1 one end is enclosed within bearing 4, and the other end is connected with the second drive link 5.2 by bolt; Second drive link 5.2 middle and upper part cover has fixed mount 6, and the opposite side of fixed mount 6 is connected with two support columns, ensure that the stable of the second drive link simultaneously, fixed mount 6 and spring spool assembly 7 jointly restriction make the second drive link 5.2 only vertically move, there is pre-load nut 5.3 second drive link 5.2 middle and lower part, the upper end of pre-load nut 5.3 restraining spring, and can by the crush regulating pre-load nut 5.3 to carry out regulating spring 7.1, reach the effect of adjustment pre-tension, the reading of pre-tension can be measured by force snesor 8 and read.
As shown in Figure 3, described spring spool assembly 7 is made up of spring 7.1, first sleeve 7.2 and the second sleeve 7.3.Wherein, described spring 7.1, first sleeve 7.2 and the second sleeve 7.3 are installed with the second drive link 5.2 is concentric successively, and the lower end of the second drive link to stretch in the first sleeve and is positioned at spring inner, spring 7.1 upper end contacts with the pre-load nut 5.3 of the second drive link 5.2 middle and lower part, the combination of the first sleeve 7.2 and the second sleeve 7.3 can limit the maximal value of the second drive link 5.2 stroke, and the second sleeve 7.3 lower end is fixedly connected with force snesor 8 by bolt.
Described force snesor 8 is fixedly connected with pressure head 9 by bolt, and pre-tension reading can be measured by force snesor 8 and read; Described pressure head 9 contacts with in the middle part of sample 12, jointly realizes the effect clamping sample with fixture 10, implements three-point bending fatigue loading to sample.
Described fixture 10 is arranged on the base plate 11.1 of testing bed, testing stand 11, and has and manually can adjust the opening and closing of fixture 10 and the function of lifting, carries out testing and loading and unloading sample with the sample adapting to different size.
Described testing bed, testing stand 11 is made up of base plate 11.1, four support columns 11.2 and upper plate 11.3.Wherein, described base plate 11.1 is connected by four support columns 11.2 with upper plate 11.3, and fixed mount 6 fixedly mounts wherein on two support columns 11.2, and AC servo motor 1 is arranged on the upper plate 11.3 of testing bed, testing stand 11.
Above content is only better case study on implementation of the present invention, and for those skilled in the art, according to thought of the present invention, all can change part in specific embodiments and applications, and this description should not be construed as limitation of the present invention.
The present invention includes AC servo motor 1, rotating disk 2, slide block 3, bearing 4, gearing 5, fixed mount 6, spring spool assembly 7, force snesor 8, pressure head 9, fixture 10 and testing bed, testing stand 11.
Described AC servo motor 1 to be connected with rotating disk 2 by key and rotating disk 2 can with AC servo motor 1 axis of rotation.
Described rotating disk 2 has groove, and have scale value at groove coboundary, described slide block 3 is arranged on rotating disk 2 groove place, and can slide along rotating disk 2 groove, slide block 3 upper side edge has central groove, slide block 3 can regulate loading amplitude when rotating disk 2 groove slides, and can be read by the central groove of slide block 3 and rotating disk 2 groove coboundary scale value and specifically load amplitude.
Described bearing 4 is cylinder roller bearing, is connected with slide block 3 by bolt, once after determining to load amplitude, need this bolt fastening to play the effect of fastening slide block 3 and rotating disk 2, slide block 3 is connected with gearing 5 by bearing 4.
Described gearing 5 is made up of the first drive link 5.1 and the second drive link 5.2.Wherein, described first drive link 5.1 one end is enclosed within bearing 4, and the other end is connected with the second drive link 5.2 by bolt; Second drive link 5.2 middle and upper part cover has fixed mount 6, fixed mount 6 and spring spool assembly 7 jointly restriction make the second drive link 5.2 only vertically move, there is pre-load nut 5.3 second drive link 5.2 middle and lower part, the upper end of pre-load nut 5.3 restraining spring, and can by the crush regulating pre-load nut 5.3 to carry out regulating spring 7.1, reach the effect of adjustment pre-tension, the reading of pre-tension can be measured by force snesor 8 and read.
Described spring spool assembly 7 is made up of spring 7.1, first sleeve 7.2 and the second sleeve 7.3.Wherein, described spring 7.1, first sleeve 7.2 and the second sleeve 7.3 are installed with the second drive link 5.2 is concentric successively, spring 7.1 upper end contacts with the pre-load nut 5.3 of the second drive link 5.2 middle and lower part, the combination of the first sleeve 7.2 and the second sleeve 7.3 can limit the maximal value of the second drive link 5.2 stroke, and the second sleeve 7.3 lower end is fixedly connected with force snesor 8 by bolt.
Described force snesor 8 is fixedly connected with pressure head 9 by bolt, and pre-tension reading can be measured by force snesor 8 and read; Described pressure head 9 contacts with in the middle part of sample 12.
Described fixture 10 is arranged on the base plate 11.1 of testing bed, testing stand 11, and has and manually can adjust the opening and closing of fixture 10 and the function of lifting, carries out testing and loading and unloading sample with the sample adapting to different size.
Described testing bed, testing stand 11 is made up of base plate 11.1, four support columns 11.2 and upper plate 11.3.Wherein, described base plate 11.1 is connected by four support columns 11.2 with upper plate 11.3, and fixed mount 6 fixedly mounts wherein on two support columns 11.2, and AC servo motor 1 is arranged on the upper plate 11.3 of testing bed, testing stand 11.
Claims (2)
1. a three-point bending fatigue tester, it is characterized in that: base plate, upper plate and four support columns for connecting bottom board and upper plate form testing bed, testing stand, upper plate is provided with AC servo motor, AC servo motor output terminal is fixed with rotating disk, rotating disk is provided with groove, in groove, slide block is installed, slide block is provided with bearing by bolt, bearing outer ring is provided with the first drive link, the end of the first drive link is hinged with the second drive link, second drive link is provided with and holds out against nut, fixed mount is provided with between second drive link and two support columns, the end of the second drive link stretches in spring spool assembly, described spring spool assembly comprises the first sleeve, second sleeve and spring, described first sleeve and the second sleeve and the second drive link concentric are installed, described spring is arranged in the first sleeve and the second sleeve, and the upper end of spring with hold out against nut and contact, the end of the second sleeve is fixed with force snesor, the end of force snesor is provided with pressure head, described base plate is provided with fixture, fixture is provided with the sample contacted with pressure head.
2. a kind of three-point bending fatigue tester according to claim 1, is characterized in that: described groove coboundary has scale value, and slide block upper side edge has central groove.
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| CN201510661464.1A CN105181481B (en) | 2015-10-14 | 2015-10-14 | A kind of three-point bending fatigue tester |
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| CN201510661464.1A CN105181481B (en) | 2015-10-14 | 2015-10-14 | A kind of three-point bending fatigue tester |
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| CN105181481B CN105181481B (en) | 2017-11-28 |
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| CN107101821A (en) * | 2017-06-29 | 2017-08-29 | 济南科汇试验设备有限公司 | Dropper fatigue tester |
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| CN107727511A (en) * | 2017-09-20 | 2018-02-23 | 哈尔滨工程大学 | The bend test fixture of L-shaped thin plate is built on a kind of naval vessel composite |
| CN107756040A (en) * | 2017-10-20 | 2018-03-06 | 南京泓凯动力系统科技有限公司 | A kind of workpiece of motor controller controls bores mill process equipment |
| CN107941640A (en) * | 2017-11-14 | 2018-04-20 | 洛阳理工学院 | A kind of friction wear testing machine |
| CN108444816A (en) * | 2018-05-04 | 2018-08-24 | 中国电建集团华东勘测设计研究院有限公司 | A kind of rock mass discontinuity circulation shear tester and test method |
| CN109211560A (en) * | 2018-11-01 | 2019-01-15 | 哈尔滨工业大学 | A kind of pilot system tested suitable for axial workpiece fatigue life in breaker |
| CN109540668A (en) * | 2018-11-22 | 2019-03-29 | 京东方科技集团股份有限公司 | The resistance of tension application device and mask strip determines method |
| CN110579409A (en) * | 2019-10-11 | 2019-12-17 | 青岛维思顿智能新材料有限公司 | Test instrument and test method for three-point bending strength test |
| CN110749516A (en) * | 2019-10-09 | 2020-02-04 | 清华大学 | Soft film fatigue tester device |
| CN110907297A (en) * | 2019-12-26 | 2020-03-24 | 北京航空航天大学 | Three-point bending fatigue test device applied to displacement loading |
| CN112474878A (en) * | 2020-09-22 | 2021-03-12 | 成都飞机工业（集团）有限责任公司 | Constant force pressing device for part deformation correction and part deformation correction method |
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| CN107607372B (en) * | 2017-08-22 | 2020-12-25 | 哈尔滨工程大学 | Brittle material fatigue crack prefabrication testing machine |
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| CN109211560A (en) * | 2018-11-01 | 2019-01-15 | 哈尔滨工业大学 | A kind of pilot system tested suitable for axial workpiece fatigue life in breaker |
| CN109540668A (en) * | 2018-11-22 | 2019-03-29 | 京东方科技集团股份有限公司 | The resistance of tension application device and mask strip determines method |
| CN109540668B (en) * | 2018-11-22 | 2022-02-08 | 京东方科技集团股份有限公司 | Tension applying device and method for determining resistance of mask strip |
| CN110749516A (en) * | 2019-10-09 | 2020-02-04 | 清华大学 | Soft film fatigue tester device |
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| CN110907297A (en) * | 2019-12-26 | 2020-03-24 | 北京航空航天大学 | Three-point bending fatigue test device applied to displacement loading |
| CN112474878A (en) * | 2020-09-22 | 2021-03-12 | 成都飞机工业（集团）有限责任公司 | Constant force pressing device for part deformation correction and part deformation correction method |
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| CN115452604A (en) * | 2022-08-31 | 2022-12-09 | 江苏茂华检验检测有限公司 | Xenogenesis steel lateral bending detection test device |
| CN115452604B (en) * | 2022-08-31 | 2023-08-22 | 江苏茂华检验检测有限公司 | Lateral bending detection test device for dissimilar steel |
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