CN101290279A - Frequency conversion rotation bending fatigue tester - Google Patents
Frequency conversion rotation bending fatigue tester Download PDFInfo
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- CN101290279A CN101290279A CNA2008100352128A CN200810035212A CN101290279A CN 101290279 A CN101290279 A CN 101290279A CN A2008100352128 A CNA2008100352128 A CN A2008100352128A CN 200810035212 A CN200810035212 A CN 200810035212A CN 101290279 A CN101290279 A CN 101290279A
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Abstract
The invention discloses a frequency converting rotary bending tester, belonging to the material testing technical field, comprising a frame, a motor system, a control system, a balance system and a loading system, wherein, the motor system comprises a motor, metal coatings, a driving wheel, a driven wheel, a strap, a wheel shaft, a left collet and bearings; the motor is connected with the driven wheel through the driving wheel and the strap; the driven wheel is fixed on the wheel shaft; the right end of the wheel shaft is provided with the left collect, and the left end of the wheel shaft is sleeved in the frame through two bearings; and the metal coatings are covered outside the motor, the driving wheel, the driven wheel, the strap and the wheel shaft; and the left end of the frame is provided with a platform which is provided with the motor. Designs of the frame and the motor system are more reasonable, so that test errors caused by vibrations during operating are smaller. The tester frequency converting rotary bending tester has the advantages of simple structure, easy operation, low operating noise, multiple functions and accurate test data.
Description
Technical field
The present invention relates to a kind of test machines equipment of testing of materials technical field, specifically, relate to a kind of frequency conversion rotation bending fatigue tester.
Background technology
Fatigue tester is a kind of testing apparatus of test metal or nonmetallic materials fatigue lifetime and fatigue strength, mainly contains hydraulic servo formula, electromagnetic type and mechanical type several types.Wherein hydraulic servo formula fatigue tester is a kind of advanced proving installation, but the price height, in addition, when working under low frequency, power consumption is big, cost is high, needs to be used with other low-frequency fatigue test machine.Electromagnetic type torture test unit frequency height is mainly used in the fatigue behaviour test of ferrous metal fatigue behaviour preferably.Mechanical testing apparatus adopts spring counterweight self-aligning structure and combined type governing system mostly, and is simple in structure, and work rated power is little, cost is low.
The mechanical type fatigue experimental machine mostly is axial push-pull formula and plain bending formula or single-frequency rotoflector formula, and the fatigue experimental machine that China produces at present also is this several types, and wherein, axial push-pull formula fatigue tester comprises: the testing machine main body; Propulsion system; The aligning counter weight device; Control system.The testing machine main body is the test sample part, and propulsion system provide test power, and the aligning counter weight device is to be used for rotating torque that propulsion system are provided, changes vertical to-and-fro movement into, and control system is the complete machine electric-control system.This Mechanical Fatigue Test Machine though have lot of advantages, can only be tested tensile fatigue intensity but still exist, and not the energy measurement contractive condition or measurement and the more approaching stretching-compression combined state of practical application.In addition, this kind equipment volume is bigger, the structure more complicated, and motor load changes fast, not only influences electrical machinery life, also reduces power utilization.
Summary of the invention
The objective of the invention is to overcome the deficiency of above-mentioned Mechanical Fatigue Test Machine, a kind of frequency conversion rotation bending fatigue tester of simple in structure, stable performance is provided, can test the fatigue lifetime and the fatigue strength of light metal material such as magnesium alloy.
The present invention is achieved through the following technical solutions, the present invention includes: support, electric system, control system, loading system, balanced system, wherein, electric system, control system and balanced system are fixed on the support, and loading system is suspended in by balanced system in the air.Electric system is to be used to drive the fatigue testing specimen rotation, control system is to be used for the connection of each part and the running and the record test figure of entire equipment, loading system is used for the clamping sample and load is provided, and the weight that balanced system is used for balancing loading system clamping sample and suspends a skyborne end in midair.
Described electric system comprises motor, metal-coating, driving wheel, engaged wheel, belt, wheel shaft, left chuck and bearing, annexation is: motor links to each other with engaged wheel with belt by driving wheel, engaged wheel is fixed on the wheel shaft, the right-hand member of wheel shaft is equipped with the end that left chuck is used for the clamping sample, the left end of wheel shaft passes through two bearing holder (housing, cover)s in support, and motor, driving wheel, engaged wheel, belt and wheel shaft outside are with metal-coating.
Described support left end is provided with a platform, and motor is arranged on this platform.
Described engaged wheel is fixed on the high order end of wheel shaft.
Described control system comprises sensor, limit switch, motor switch, control box, Switching Power Supply, counter, timer, contactor, frequency modulator, frequency modulation switch, positive and negative switch, terminal block, wherein, Switching Power Supply, counter, timer, contactor, frequency modulator, terminal block is placed in the control box, motor switch connects a positive and negative switch, positive and negative switch is installed on the support near control box and links to each other with frequency modulator with timer in the control box, and frequency modulator is connected with frequency modulation switch outward, sensor is placed on the wheel shaft below and links to each other with counter with terminal block by electric wire, limit switch links to each other with Switching Power Supply with terminal block by electric wire, Switching Power Supply links to each other with contactor more then, and contactor is connected on the motor switch.
Described positive and negative switch is clockwise with adjustable counterclockwise.
Described counter and timer are eight.
The frequency of described frequency modulator is adjustable continuously in 0～100Hz.
Described loading system comprises iron wire, support, pulley, pulley latch, loads bucket and guard circle; annexation is: an end of iron wire connects clamping device; the other end strides across pulley and links to each other with the loading bucket; pulley is fixed on the support by the pulley latch; support casing is crossed motor and is fixed on the platform of support left end; load outside the bucket and be with guard circle, guard circle is fixed on the support and is positioned at above the limit switch.
Described balanced system is made up of sample holder device and coupled balance device.
Described clamping device comprises A-frame, axle, bearing, screw, flange, right chuck, packet and screw, annexation is: a bearing is respectively placed at the packet two ends, wherein, one end of clamping sample flange and screw retention bearing, other end screw solid bearing, axle is fixed in two bearings, and an end of axle has right chuck, and an A-frame is fixed in the top of packet.
Described balance device comprises bracing frame, balance bar, hook, chain, counterweight and latch, annexation is: bracing frame is fixed on the support, balance bar links to each other with bracing frame by latch, balance bar is that an end of rectangular parallelepiped links to each other with clamping device with chain by hook, and balance bar is that an end of outside nut type overlaps a counterweight.
When the present invention works, the counterweight in the adjustment device at first, make it and the clamping device complete equipilibrium, to guarantee that the power that sample is subjected to is the weight that loads bucket and interior load thereof, use left chuck and right chuck firm afterwards sample holder, and earlier 10% of gross load is put in the loading bucket, sample is subjected to a curved moment like this, select electric machine frequency and direction of motor rotation according to test situation by frequency modulator then, start motor, and step by step load is added to 100%, sample is subjected to a circulation moment like this, stress ratio is-1, the load of this testing machine, relation between moment and the stress is looked the difference of specimen shape and difference.Simultaneously, be placed on the number of revolutions of the sensor record sample below the wheel shaft and show by counter, the timer that links to each other with positive and negative switch is then noted the on time of motor so that the correction test result, if sample fracture, load bucket and in the decline process, can touch limit switch, the guard circle that is arranged on above the limit switch can guarantee to load bucket safety knock limit switch and do not tilt, and then the automatic disable motor power supply of the contactor that links to each other with limit switch meeting, sample is taken out in off-test; If sample does not also have fracture after reaching the designated cycle number of times, then can the manual-lock motor switch, sample is taken out in off-test.
Compared with prior art, support of the present invention and electric system design are more reasonable, the test error that vibrations caused in the work is less, timer, frequency modulator, positive and negative switch have been comprised in the control system in addition, its test speed is adjustable, frequency of operation 0～100Hz is adjustable, maximum (top) speed 6000r/Min.It can hang down week or high-cycle fatigue test to the metal material sample of the multiple size and dimension that meets national standard, is the ideal equipment to the research of metal material rotoflector double frequency fatigue properties.This testing machine structure is simple, and is easy to operate, and operating noise is low, and function is many, and test figure is accurate.
Description of drawings
Fig. 1 is a perspective view of the present invention;
Fig. 2 is a loading system partial schematic diagram of the present invention;
Fig. 3 is a control system partial schematic diagram of the present invention;
Fig. 4 is a theory structure synoptic diagram of the present invention;
Fig. 5 is a work connection diagram of the present invention.
Among the figure: 1-motor, 2-driving wheel, 3-belt, 4-engaged wheel, 5-support; the 6-support, 7-motor switch, 8-control box, 9-counter, 10-A-frame; the 11-bracing frame, 12-chain, 13-axle, 14-sample; the 15-screw, 16-left side chuck, the right chuck of 17-, 18-hook; 19-iron wire, 20-pulley, 21-load bucket, 22-guard circle; the 23-limit switch, 24-sensor, 25-bearing, 26-flange; the 27-screw, 28-terminal block, 29-contactor, 30-Switching Power Supply; the 31-latch, 32-pulley latch, 33-wheel shaft, 34-packet; the 35-counterweight, 36-balance bar, 37-platform, 38-timer; the positive and negative switch of 39-, 40-speed-regulating switch, 41-metal-coating, 42-frequency modulator.
Embodiment
Below in conjunction with accompanying drawing embodiments of the invention are elaborated: present embodiment has provided detailed embodiment and process being to implement under the prerequisite with the technical solution of the present invention, but protection scope of the present invention is not limited to following embodiment.
As shown in Figure 1, present embodiment comprises: support 5, electric system, control system, loading system, balanced system, and wherein, electric system, control system and balanced system are fixed on the support 5, and loading system is suspended in by balanced system in the air.Electric system is to be used to drive fatigue testing specimen 14 rotations, control system is to be used for the connection of each part and the running and the record test figure of entire equipment, loading system is used for clamping sample 14 and load is provided, and the weight that balanced system is used for balancing loading system clamping sample 14 and suspends a skyborne end in midair.
Shown in Fig. 1,2,4, described electric system comprises motor 1, metal-coating 41, driving wheel 2, engaged wheel 4, belt 3, wheel shaft 33, left chuck 16 and bearing 25, annexation is: motor 1 links to each other with engaged wheel 4 with belt 3 by driving wheel 2, engaged wheel 4 is fixed on the wheel shaft 33, wheel shaft 33 right-hand members are provided with the end that left chuck 16 is used for clamping sample 14, the left end of wheel shaft 33 is enclosed within 5 li on support by two bearings 25, and motor 1, driving wheel 2, engaged wheel 4, belt 3 and wheel shaft 33 outsides are with metal-coating 41.
Described support 5 left ends are provided with a platform 37.Motor 1 is installed on the platform 37 of support 5 left ends.
Described engaged wheel 4 is fixed on the high order end of wheel shaft 33.
As Fig. 1,2, shown in 4, described control system comprises sensor 24, limit switch 23, motor switch 7, control box 8, Switching Power Supply 30, counter 9, timer 38, contactor 29, frequency modulator 42, frequency modulation switch 40, positive and negative switch 39, terminal block 28, wherein, Switching Power Supply 30, counter 9, timer 38, contactor 29, frequency modulator 42, terminal block 28 is placed in the control box 8, motor switch 7 connects a positive and negative switch 39, positive and negative switch 39 is installed on the support 5 near control box 8 and links to each other with frequency modulator 42 with timer 38 in the control box 8, and the frequency modulator 42 outer frequency modulation switch 40 that are connected with, sensor 24 is placed on wheel shaft 33 belows and links to each other with counter 9 with terminal block 28 by electric wire, limit switch 23 links to each other with Switching Power Supply 30 with terminal block 28 by electric wire, Switching Power Supply 30 links to each other with contactor 29 more then, and contactor 29 is connected on the motor switch 7.
Described positive and negative switch 39 is clockwise with adjustable counterclockwise.
Described counter 9 and timer 38 are eight.
The frequency of described frequency modulator 42 is adjustable continuously in 0～100Hz.
As shown in Figure 1, 2; described loading system comprises iron wire 19, support 6, pulley 20, pulley latch 32, loads bucket 21 and guard circle 22; annexation is: an end of iron wire 19 connects clamping device; the other end strides across pulley 20 and links to each other with loading bucket 21; pulley 20 is fixed on the support 6 by pulley latch 32; support 6 overlapped motor 1 and was fixed on the platform 37 of support 5 left ends, loaded outside the bucket 21 and was with guard circle 22, and guard circle 22 is fixed on the support 6 and is positioned at above the limit switch 23.
Described limit switch 23 is positioned at below the loading bucket 21 of support 6.
Shown in Fig. 1,3,5, described balanced system is made up of sample 14 clamping devices and coupled balance device.
Clamping device comprises A-frame 10, axle 13, bearing 25, screw 15, flange 26, right chuck 17, packet 34 and screw 27, annexation is: a bearing 25 is respectively placed at packet 34 two ends, wherein, one end of clamping sample flange 26 and screw 27 solid bearings 25, other end screw 15 solid bearings 25, axle 13 is fixed on 25 li on two bearings, and an end of axle 13 has right chuck 17, and an A-frame 10 is fixed in the top of packet 34.
Balance device comprises bracing frame 11, balance bar 36, hook 18, chain 12, counterweight 35 and latch 31, annexation is: bracing frame 11 is fixed on the support 5, balance bar 36 links to each other with bracing frame 11 by latch 31, balance bar 36 is that an end of rectangular parallelepiped links to each other with clamping device with chain 12 by hook 18, and balance bar 36 overlaps a counterweight 35 for an end of outside nut type.
One end of the iron wire 19 of loading system connects the upper end of clamping device A-frame 10.
When the testing machine of said structure uses, the counterweight 35 in the adjustment device at first, make it and the clamping device complete equipilibrium, to guarantee that the power that sample is subjected to is the weight that loads bucket 21 and interior load thereof, use left chuck 16 and right chuck 17 firm afterwards sample 14 clampings, and earlier 10% of gross load is put into 21 li in loading bucket, sample 14 is subjected to a curved moment like this, select motor 1 frequency and motor 1 rotation direction according to test situation by frequency modulator 42 then, start motor 1, and step by step load is added to 100%, and sample 14 is subjected to a circulation moment like this, and stress ratio is-1; Simultaneously, be placed on the number of revolutions of the sensors 24 record samples 14 below the wheel shaft 33 and show by counter 9, the timer 38 that links to each other with positive and negative switch 39 is then noted the on time of motor 1 so that the correction test result, if sample 14 fractures, load bucket 21 and in the decline process, can touch limit switch 23, the guard circle 22 that is arranged on above the limit switch 23 can guarantee to load bucket 21 safety knock limit switches 23 and do not tilt, and then automatic disable motor 1 power supply of contactor 29 meetings that links to each other with limit switch 23, sample 14 is taken out in off-test; If sample 14 does not also have fracture after reaching the designated cycle number of times, then can manual-lock motor switch 7, sample 14 is taken out in off-test.Relation between the load of this testing machine, moment and the stress is looked the difference of sample 14 shapes and difference, if funnel type sample 14, then suffered stress of sample 14 and the relational expression between load and the moment are:
M＝PL，
Wherein, I is that moment of inertia, D are that diameter, the M in sample 14 centre positions is that moment, P are that load, L are that the arm of force, σ are stress.
The beneficial effect of present embodiment is: structural design of the present invention is more reasonable, safe, motor 1 is more durable in use, can freely select motor 1 frequency and sense of rotation according to test situation, rotating speed is that 0～6000r/Min is adjustable continuously, by counter 9 and timer 38 record test figures, test findings is more accurate, and these improvement have enlarged the usable range of this testing machine.
Claims (10)
1, a kind of frequency conversion rotation bending fatigue tester, comprise: support, electric system, control system, loading system, balanced system, electric system, control system and balanced system are fixed on the support, and loading system is suspended in the air by balanced system, it is characterized in that:
Described electric system comprises motor, metal-coating, driving wheel, engaged wheel, belt, wheel shaft, left chuck and bearing, motor links to each other with engaged wheel with belt by driving wheel, engaged wheel is fixed on the wheel shaft, the right-hand member of wheel shaft is provided with left chuck, in support, motor, driving wheel, engaged wheel, belt and wheel shaft outside are with metal-coating to the left end of wheel shaft by two bearing holder (housing, cover)s;
Described support left end is provided with a platform, and motor is arranged on this platform.
2, frequency conversion rotation bending fatigue tester according to claim 1, it is characterized in that, described control system comprises sensor, limit switch, motor switch, control box, Switching Power Supply, counter, timer, contactor, frequency modulator, frequency modulation switch, positive and negative switch, terminal block, Switching Power Supply, counter, timer, contactor, frequency modulator, terminal block is placed in the control box, motor switch connects a positive and negative switch, positive and negative switch is arranged on the support near control box and links to each other with frequency modulator with timer in the control box, frequency modulator is connected with frequency modulation switch outward, sensor is placed on the wheel shaft below and links to each other with counter with terminal block by electric wire, limit switch links to each other with Switching Power Supply with terminal block by electric wire, Switching Power Supply links to each other with contactor again, and contactor is connected on the motor switch.
3, frequency conversion rotation bending fatigue tester according to claim 2 is characterized in that, described limit switch is positioned at below the loading bucket of loading system.
4, frequency conversion rotation bending fatigue tester according to claim 2 is characterized in that, described counter and timer are eight.
5, frequency conversion rotation bending fatigue tester according to claim 2 is characterized in that, described frequency modulator, and its frequency is 0～100Hz.
6, frequency conversion rotation bending fatigue tester according to claim 1; it is characterized in that; described loading system comprises iron wire, support, pulley, pulley latch, loads bucket and guard circle; one end of iron wire connects clamping device; the other end strides across pulley and links to each other with the loading bucket, and pulley is fixed on the support by the pulley latch, and support casing is crossed motor and is fixed on the support; load outside the bucket and be with guard circle, guard circle is fixed on the support and is positioned at above the limit switch.
7, frequency conversion rotation bending fatigue tester according to claim 1 is characterized in that, described balanced system is made up of sample holder device and coupled balance device.
8, frequency conversion rotation bending fatigue tester according to claim 7, it is characterized in that, described clamping device comprises A-frame, axle, bearing, screw, flange, right chuck, packet and screw, the packet two ends respectively are provided with a bearing, one end of clamping sample flange and screw retention bearing, other end screw solid bearing, axle is fixed in two bearings, one end of axle has right chuck, and an A-frame is fixed in the top of packet.
9, frequency conversion rotation bending fatigue tester according to claim 7, it is characterized in that, described balance device comprises bracing frame, balance bar, hook, chain, counterweight and latch, bracing frame is fixed on the support, balance bar links to each other with bracing frame by latch, balance bar is that an end of rectangular parallelepiped links to each other with clamping device with chain by hook, and balance bar is that an end of outside nut type overlaps a counterweight.
10, frequency conversion rotation bending fatigue tester according to claim 1 is characterized in that, described engaged wheel is fixed on the high order end of wheel shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100352128A CN101290279A (en) | 2008-03-27 | 2008-03-27 | Frequency conversion rotation bending fatigue tester |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100352128A CN101290279A (en) | 2008-03-27 | 2008-03-27 | Frequency conversion rotation bending fatigue tester |
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| CN101290279A true CN101290279A (en) | 2008-10-22 |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101963541A (en) * | 2010-08-26 | 2011-02-02 | 江西洪都航空工业集团有限责任公司 | Pipe rotating repeated bend test device |
| CN101982755A (en) * | 2010-10-15 | 2011-03-02 | 沈阳航空航天大学 | Rotary bending fatigue tester of aviation conduit assembly |
| CN102866066A (en) * | 2012-09-17 | 2013-01-09 | 中国科学院力学研究所 | Rotating bending fatigue test device and method with axial load control function |
| CN103712868A (en) * | 2014-01-22 | 2014-04-09 | 宁夏青山试验机有限公司 | Rotating bending fatigue testing machine |
| CN105067218A (en) * | 2015-09-21 | 2015-11-18 | 成都市天龙交通设备有限公司 | Folding chair working life test bench device and test method |
| CN106525591A (en) * | 2016-11-30 | 2017-03-22 | 西南交通大学 | Material damage tolerance detection device based on rotating bending fatigue as well as detection method |
| CN106950116A (en) * | 2017-03-02 | 2017-07-14 | 天津大学 | Coupling between bending and extension corrosion fatigue testing machine |
| CN110361286A (en) * | 2019-07-22 | 2019-10-22 | 中国航发沈阳发动机研究所 | A kind of rotary bending tester calibrating installation and method |
| CN112254940A (en) * | 2019-07-05 | 2021-01-22 | 中车长春轨道客车股份有限公司 | Testing device and testing method for axle fatigue test |
-
2008
- 2008-03-27 CN CNA2008100352128A patent/CN101290279A/en active Pending
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101963541A (en) * | 2010-08-26 | 2011-02-02 | 江西洪都航空工业集团有限责任公司 | Pipe rotating repeated bend test device |
| CN101963541B (en) * | 2010-08-26 | 2011-12-28 | 江西洪都航空工业集团有限责任公司 | Pipe rotating repeated bend test device |
| CN101982755A (en) * | 2010-10-15 | 2011-03-02 | 沈阳航空航天大学 | Rotary bending fatigue tester of aviation conduit assembly |
| CN102866066A (en) * | 2012-09-17 | 2013-01-09 | 中国科学院力学研究所 | Rotating bending fatigue test device and method with axial load control function |
| CN102866066B (en) * | 2012-09-17 | 2015-07-22 | 中国科学院力学研究所 | Rotating bending fatigue test device and method with axial load control function |
| CN103712868A (en) * | 2014-01-22 | 2014-04-09 | 宁夏青山试验机有限公司 | Rotating bending fatigue testing machine |
| CN105067218A (en) * | 2015-09-21 | 2015-11-18 | 成都市天龙交通设备有限公司 | Folding chair working life test bench device and test method |
| CN105067218B (en) * | 2015-09-21 | 2017-08-11 | 成都市天龙交通设备有限公司 | Folding seat operation life test table apparatus and method of testing |
| CN106525591A (en) * | 2016-11-30 | 2017-03-22 | 西南交通大学 | Material damage tolerance detection device based on rotating bending fatigue as well as detection method |
| CN106525591B (en) * | 2016-11-30 | 2023-09-12 | 西南交通大学 | Material damage tolerance detection device and method based on rotational bending fatigue |
| CN106950116A (en) * | 2017-03-02 | 2017-07-14 | 天津大学 | Coupling between bending and extension corrosion fatigue testing machine |
| CN112254940A (en) * | 2019-07-05 | 2021-01-22 | 中车长春轨道客车股份有限公司 | Testing device and testing method for axle fatigue test |
| CN110361286A (en) * | 2019-07-22 | 2019-10-22 | 中国航发沈阳发动机研究所 | A kind of rotary bending tester calibrating installation and method |
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Open date: 20081022 |