CN103940679B - A kind of 3 overhanging bending creep parameter measuring apparatus and method of work thereof - Google Patents
A kind of 3 overhanging bending creep parameter measuring apparatus and method of work thereof Download PDFInfo
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- CN103940679B CN103940679B CN201410154493.4A CN201410154493A CN103940679B CN 103940679 B CN103940679 B CN 103940679B CN 201410154493 A CN201410154493 A CN 201410154493A CN 103940679 B CN103940679 B CN 103940679B
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Abstract
The invention discloses a kind of 3 overhanging bending creep parameter measuring apparatus and method of work thereof, the horizontal clamping device of this measurement mechanism comprises upper grip and lower chuck, two chucks are connected with work support by slide block structure, can move horizontally and vertical movement respectively along work support; Charger is connected with charger support by slide block structure, can move along charger support level; Laser displacement sensor is connected with sensor support device by slide block structure, can move horizontally along sensor support device; Sensor support device is connected with sensor stand by slide block structure, can along sensor stand vertically movement.The present invention all can realize three-point bending creep test for the part of different size, ratio between 3 can conveniently regulate, required load can be carried out convenience as required and be loaded, the position of displacement transducer can change with the change of charger position, and the bending creep rate of change of workpiece can be obtained in more convenient measurement.
Description
Technical field
The present invention relates to creep parameters fields of measurement, specifically a kind of 3 overhanging bending creep parameter measuring apparatus and method of work thereof.
Background technology
At the numerous areas of industry, equipment is in complexity, severe working environment, and it involves great expense, and in whole production run, its effect is irreplaceable.Once equipment unplanned stopping because of accident, heavy losses may be caused.And creep rupture be high temperature, a kind of very important form of destroying under high-stress state.To the accurate measurement of equipment creep parameters, the loss caused because of creep rupture because of equipment greatly can be reduced.
Adopt standard sample to obtain the creep parameters of material at traditional uniaxial tension creep test, often need lot of materials, draw materials in a large number simultaneously and also can bring destruction to original equipment, affect the normal operation of equipment.And sometimes also the requirement of traditional performance test to specimen size can cannot be met because materialsed volume is too little in some tiny devices failtests, and cause experiment to carry out.
In the inspection and life appraisal of commercial unit material property, will adopt method that is harmless or half damage detection on the one hand as far as possible, must obtain again the mechanical property of material on the other hand to greatest extent, microminiature sample is the effective ways solving this double-barreled question.That study the method the earliest is Dom and Niebuhr.The theoretical research work of bending creep test has achieved many progress so far, is come microstructure and the mechanical property of research material by different experiments parameter, but it is rare at present directly to obtain the method for material creep parameter from the data obtained.The Ma Yuanrui of East China University of Science proposes the croop property that symmetrical three-point bending test method measures material, but it does not provide a practicable experimental provision, the people such as the Xu of Northwestern Polytechnical University propose asymmetrical overhanging bending creep test method, its experimental provision is simple, but require higher to the range of size of part, the particularly thickness of part, more accurately must to coincide the position of guarantee part in comparatively level with experimental provision, and the ratio between 3, its device is fixing, cannot adjust, the more important thing is that the measurement for the bending change rate of part does not propose a reasonable measure.
Summary of the invention
The present invention is in order to improve the defect of existing creep parameters measuring technique, provide a kind of 3 overhanging bending creep parameter measuring apparatus and method of work thereof, part for different size all can realize three-point bending creep test, and the ratio between 3 can conveniently regulate.
The invention provides a kind of 3 overhanging bending creep parameter measuring apparatus, comprise base, base two ends are respectively equipped with work support perpendicular to base and sensor stand, fix workpiece for measurement one end, make workpiece for measurement parallel with base in the middle part of work support by clamping device; Work support upper end is connected with the charger support parallel with workpiece for measurement, charger support is equipped with the charger vertical with workpiece for measurement, weight payload platform is equipped with in charger upper end, and the support osculatory of charger lower end contacts with the workpiece for measurement other end; The laser displacement sensor connecting computer is provided with directly over charger, laser displacement sensor is connected with sensor stand by sensor support device, described horizontal clamping device comprises upper grip and lower chuck, two chucks are connected with work support by slide block structure, can move horizontally and vertical movement respectively along work support; Charger is connected with charger support by slide block structure, can move along charger support level; Laser displacement sensor is connected with sensor support device by slide block structure, can move horizontally along sensor support device; Sensor support device is connected with sensor stand by slide block structure, can along sensor stand vertically movement.
Further improvement, described slide block device comprises slide block and chute, and slide block and chute side all have fastening screw pit, spacing by fastening bolt between slide block and chute.
Present invention also offers a kind of method of work of 3 overhanging bending creep parameter measuring apparatus, comprise the following steps:
1) according to the thickness of workpiece for measurement, the upper lower chuck of clamping device is regulated by slide block structure, by fastening bolt fixed chuck clamping workpiece for measurement;
2) according to the length of workpiece for measurement, by the horizontal level of slide block structure adjusting load device, the support osculatory of charger lower end is contacted with workpiece end;
3) by the horizontal level of adjustment clamping device chuck and the horizontal level of charger, the ratio between regulating at 3;
4) regulated the horizontal level of laser displacement sensor by slide block structure, make laser displacement sensor be positioned at directly over charger, by fastening bolt fixed laser displacement transducer;
5) on weight payload platform, load weight is placed;
6) height of laser displacement sensor is regulated by the slide block structure between sensor support device and sensor stand, the height of laser displacement sensor and load weight is positioned within the effective range of laser displacement sensor, utilizes laser displacement sensor to measure the height of load weight;
7) on weight payload platform, place the load weight of different number, repeat step 6), utilize PC to measure and record the time dependent relation of height of load weight, the time dependent process of workpiece for measurement bending creep can be obtained.
Described laser displacement sensor sample frequency is less than 1 hertz.
Beneficial effect of the present invention is: the part for different size all can realize three-point bending creep test, ratio between 3 can conveniently regulate, required load can be carried out convenience as required and be loaded, the position of displacement transducer can change with the change of charger position, and the bending creep rate of change of workpiece can be obtained in more convenient measurement.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is base of the present invention and main support structural representation.
Fig. 3 is charger structural representation.
Fig. 4 is charger slide block structure schematic diagram.
Fig. 5 is sensor support apparatus structure schematic diagram.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
Structure of the present invention, as shown in 1 and Fig. 2, comprises base 10, and base 10 two ends are respectively equipped with work support 17 perpendicular to base 10 and sensor stand 11.Fix workpiece for measurement 9 one end by clamping device in the middle part of work support 17, clamping device comprises upper grip 7 and lower chuck 8.Upper grip vertical chute 14 and the horizontal slide opening 15 of lower chuck is had in the middle part of work support 17.Upper grip 7 self, as slide block, can slide up and down in upper grip vertical chute 14, is undertaken spacing by the fastening screw pit of work support 17 side and fastening bolt.Lower chuck 8 self, can horizontal slip in the horizontal slide opening 15 of lower chuck as slide block, is undertaken spacing by the fastening screw pit of work support 17 side and fastening bolt.One end of workpiece for measurement is clamped by upper lower chuck, makes workpiece for measurement 9 parallel with base 10.
Work support 17 upper end is connected with the charger support 16 parallel with workpiece for measurement 9, charger support 16 has charger chute 13, charger slide block 19 is housed in charger chute 13, and charger slide block 19 can horizontal slip in charger chute 13.Charger pilot hole 18(is had as shown in Figure 4 in the middle of charger slide block 19), charger 6 is through charger pilot hole 18, and the support osculatory 21 of its lower end contacts with workpiece for measurement 9 other end.Weight payload platform 20(is equipped with as shown in Figure 3 in charger 6 upper end), weight payload platform 20 is for bearing load weight 5.
Sensor stand 11 side has sensor stand chute, sensor support device 3 is L-type, its side is with bracing frame slide block 12(as shown in Figure 5), bracing frame slide block 12 vertically slides in sensor stand chute, by the fastening screw pit of side and fastening bolt spacing.
Sensor support device 3 top has sensor chute 2, laser displacement sensor 1 self as slide block, horizontal slip in sensor chute 2, by the fastening screw pit of side and fastening bolt spacing.Laser displacement sensor 1 is connected with computer 4.
The method of work of this device comprises the following steps:
1) according to the thickness of workpiece for measurement, the upper lower chuck of clamping device is regulated by slide block structure, by fastening bolt fixed chuck clamping workpiece for measurement;
2) according to the length of workpiece for measurement, by the horizontal level of slide block structure adjusting load device, the support osculatory of charger lower end is contacted with workpiece end;
3) by the horizontal level of adjustment clamping device chuck and the horizontal level of charger, the ratio between regulating at 3;
4) regulated the horizontal level of laser displacement sensor by slide block structure, make laser displacement sensor be positioned at directly over charger, by fastening bolt fixed laser displacement transducer;
5) on weight payload platform, load weight is placed;
6) height of laser displacement sensor is regulated by the slide block structure between sensor support device and sensor stand, the height of laser displacement sensor and load weight is positioned within the effective range of laser displacement sensor, utilizes laser displacement sensor to measure the height of load weight;
7) on weight payload platform, place the load weight of different number, repeat step 6), utilize PC to measure and record the time dependent relation of height of load weight, the time dependent process of workpiece for measurement bending creep can be obtained.
The process of the creep of workpiece is a process quite slowly, if frequency acquisition is too high when carrying out data acquisition with laser displacement sensor, often both unnecessary, and data volume can be caused excessive, finally causes the difficulty of data processing.When gathering, often the sample frequency of 1 hertz is enough.
Embody rule approach of the present invention is a lot, and the above is only the preferred embodiment of the present invention, should be understood that; for those skilled in the art; under the premise without departing from the principles of the invention, can also make some improvement, these improvement also should be considered as protection scope of the present invention.
Claims (3)
1. 3 overhanging bending creep parameter measuring apparatus, comprise base (10), base (10) two ends are respectively equipped with work support (17) perpendicular to base (10) and sensor stand (11), workpiece for measurement (9) one end is fixed by clamping device in work support (17) middle part, makes workpiece for measurement (9) parallel with base (10); Work support (17) upper end is connected with the charger support (16) parallel with workpiece for measurement (9), the charger (6) vertical with workpiece for measurement (9) charger support (16) be equipped with, weight payload platform (20) is equipped with in charger (6) upper end, and the support osculatory (21) of charger (6) lower end contacts with workpiece for measurement (9) other end; The laser displacement sensor (1) connecting computer (4) is provided with directly over charger (6), laser displacement sensor (1) is connected with sensor stand (11) by sensor support device (3), it is characterized in that: described clamping device comprises upper grip (7) and lower chuck (8), two chucks are connected with work support (17) by slide block structure, can move horizontally and vertical movement respectively along work support (17); Charger (6) is connected with charger support (16) by slide block structure, can move horizontally along charger support (16); Laser displacement sensor (1) is connected with sensor support device (3) by slide block structure, can move horizontally along sensor support device (3); Sensor support device (3) is connected with sensor stand (11) by slide block structure, can along sensor stand (11) vertically movement.
2. 3 overhanging bending creep parameter measuring apparatus according to claim 1, it is characterized in that: described slide block device comprises slide block and chute, slide block and chute side all have fastening screw pit, spacing by fastening bolt between slide block and chute.
3., based on a method of work for the overhanging bending creep parameter measuring apparatus of three described in claim 1 or 2, it is characterized in that comprising the following steps:
1) according to the thickness of workpiece for measurement, the upper lower chuck of clamping device is regulated by slide block structure, by fastening bolt fixed chuck clamping workpiece for measurement;
2) according to the length of workpiece for measurement, by the horizontal level of slide block structure adjusting load device, the support osculatory of charger lower end is contacted with workpiece end;
3) by the horizontal level of adjustment clamping device chuck and the horizontal level of charger, the ratio between regulating at 3;
4) regulated the horizontal level of laser displacement sensor by slide block structure, make laser displacement sensor be positioned at directly over charger, by fastening bolt fixed laser displacement transducer;
5) on weight payload platform, load weight is placed;
6) height of laser displacement sensor is regulated by the slide block structure between sensor support device and sensor stand, the height of laser displacement sensor and load weight is positioned within the effective range of laser displacement sensor, utilizes laser displacement sensor to measure the height of load weight;
7) on weight payload platform, place the load weight of different number, repeat step 6), utilize PC to measure and record the time dependent relation of height of load weight, the time dependent process of workpiece for measurement bending creep can be obtained.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104198289A (en) * | 2014-09-16 | 2014-12-10 | 盐城工学院 | Measuring device for four-point bending creep parameters and operating method |
| CN104406863B (en) * | 2014-12-03 | 2017-06-06 | 清华大学苏州汽车研究院（相城） | A kind of three point bending test device and test method for high speed tensile test machine |
| CN104749026A (en) * | 2015-04-20 | 2015-07-01 | 重庆大学 | In-vitro bone defect model as well as detection device and detection method for shape resilience |
| CN105651622A (en) * | 2016-03-01 | 2016-06-08 | 河南理工大学 | Method for measuring bending resistant property of material and test instrument for method |
| CN106442112B (en) * | 2016-11-03 | 2019-04-30 | 成都理工大学 | A kind of rock beam sample suspension formula bend test device |
| CN108151684B (en) * | 2016-12-05 | 2024-05-14 | 上海陶乾自动化设备有限公司 | Auxiliary measuring device and measuring equipment |
| CN106706445A (en) * | 2016-12-09 | 2017-05-24 | 安徽省建筑工程质量监督检测站 | Experiment table for testing bending strength of stone and method for testing bending strength of stone |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202221398U (en) * | 2011-07-22 | 2012-05-16 | 浙江吉利汽车研究院有限公司 | Three point bending test device |
| CN203894121U (en) * | 2014-04-17 | 2014-10-22 | 南京航空航天大学 | Three-point overhang curving creep parameter measuring device |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202221398U (en) * | 2011-07-22 | 2012-05-16 | 浙江吉利汽车研究院有限公司 | Three point bending test device |
| CN203894121U (en) * | 2014-04-17 | 2014-10-22 | 南京航空航天大学 | Three-point overhang curving creep parameter measuring device |
Non-Patent Citations (3)
| Title |
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| A numerical procedure for retrieving material creep properties from bending creep tests;B.X.XU等;《ACTA MATERIAL》;20070912;第55卷(第18期);第6275-6283页 * |
| 三点弯小试样测试材料蠕变性能的方法;庄法坤等;《华东理工大学学报（自然科学版）》;20120229;第38卷(第1期);第107-115页 * |
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