CN1587970A - High frequency responding high temperature drawing-twisting fatigue extender - Google Patents
High frequency responding high temperature drawing-twisting fatigue extender Download PDFInfo
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- CN1587970A CN1587970A CN 200410072189 CN200410072189A CN1587970A CN 1587970 A CN1587970 A CN 1587970A CN 200410072189 CN200410072189 CN 200410072189 CN 200410072189 A CN200410072189 A CN 200410072189A CN 1587970 A CN1587970 A CN 1587970A
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Abstract
The invention of a high frequency response high temperature drag-twist fatigue extensometer belongs to modified technique of drag-twist fatigue tester including displacement sensor and dual-direction two liver mechanism which includes two inisopachous wall right angle type stressedpiston installed symmetrically with facing ends of vertical thick walled board linked with a quartz thimble separately and drag-twist atresser, torsion moment measuring machine, stretching tester linked successive towards outer with two thin walled boards. The drag-twist atresser includes two rotating shafts, spring slice and support stick linking to it, the torsion moment tester in stretching tester includes rotation reflecting plate and torsion moment displacement senser and the stretch tester includes axial reflecting plate and axial displacement sensor. The invention has the advantages of simple installation, fast dynamic response of measurement, small temperature drift, wide measuring range, long life and high accuracy.
Description
Technical field:
The present invention relates to a kind of high frequency responding high temperature drawing-twisting fatigue extender, belong to the improvement technology of the drawing-twisting fatigue tester of material.
Background technology:
The present domestic single shaft fatigue extender that only has, the manufacturing technology that does not also have the multiaxis fatigue extender, and the test philosophy of single shaft extensometer remains based on strain gauge method, does not fundamentally overcome the intrinsic weak point of strain gauge method, is subjected to the good bad influence of paster bigger as measuring accuracy, temperature drift, dynamic response is slow, and measurement range is little, and serviceable life is short etc., existing simultaneously extensometer can't be used for the high-temperature material test, so its applicability is relatively poor.
Summary of the invention:
The object of the present invention is to provide a kind of high frequency responding high temperature drawing-twisting fatigue extender, this fatigue extender, it is fast to measure dynamic response, precision height, long service life.
The present invention is realized by following technical proposals.This fatigue extender comprises that two-way two leverages and displacement transducer constitute, it is characterized in that: two-way two leverages comprise two symmetrically arranged non-heavy wall section square stressed plates 1 that wait up and down, 11, counterpart end in the vertical heavy wall plate section of two stressed plates respectively connects a quartzy thimble 15 by pressing plate 14 and bolt 13, on two thin-walled part sections of two stressed plates, connect successively from the inside to the outside and draw-turn round Force receiver, torsion-testing device and extension test device, described drawing-turn round Force receiver comprise that two rotating shaft 3 rotating shafts are connecting spring leaf 2 and the supporting rod 10 that is connected on the spring leaf constitutes; Described torsion-testing device comprises torsional displacement sensor 9 formations of rotating reflecting plate 8 and being connected supporting riser 4; Described extension test device comprises that being bearing in the axial reflecting plate 6 and the shaft position sensor 7 that connect riser 5 constitutes.
The invention has the advantages that, simple in structure, easy for installation, test specification can be adjusted flexibly, dynamic response characteristic is good, test frequency can reach 5 numbers/minute, the stretching strain maximal value can reach 5%, the shearing strain maximal value can reach 5%, probe temperature can reach 600～800 ℃, and temperature is floated little, and measurement range is wide, long service life, the characteristics that precision is high.
Description of drawings:
Fig. 1 is a structural representation of the present invention.
Among the figure: stressed plate, 2 spring leafs, 3 rotating shafts, 4 supporting risers, 5 connect riser, 6 axial reflecting plates, 7 shaft position sensors, 8 rotation reflecting plates, 9 torsional displacement sensors, 10 supporting rods, 11 lower stress plates, 12 screws, 13 bolts, 14 pressing plates, 15 quartzy thimbles, 16 test specimens on 1.
Embodiment:
Preparation of the present invention, stressed plate 1, rotating shaft 3, supporting riser 4, connection riser 5, supporting rod 10, following force transmitting board 11 etc. all adopt aluminum alloy materials on the main body, axially reflecting plate 6, rotation reflecting plate 8 adopt No. 45 steel, and spring leaf adopts 20mm wide, and 304 stainless steel substrates that 0.3mm is thick are made.Design the height of spring leaf according to the gauge length of required extensometer.During assembling, utilize the good quartzy thimble of bolt earlier, again spring leaf 2 and rotating shaft 3 and supporting rod 10 are connected, to support riser 4 respectively, connect riser 5 and rotate reflecting plate 8 and be connected with lower stress plate 11, and utilize nut that spring leaf rotating shaft and stressed plate are fixed at last and get final product with last force transmitting board 1.Under the situation that satisfies rigidity and requirement of strength, unified M4 screw thread, M4 stainless steel screw or the bolt of adopting connects as calculated.
In addition, easy for installation for guaranteeing the extensometer test, also will be according to the physical dimension design extensometer framework of testing machine chuck, frame height is generally 1.5 times to 2 times of extensometer height, should guarantee that framework has enough rigidity.
Structural design of the present invention is mainly based on lever principle, its test philosophy is, elastic deformation by rotating shaft and spring leaf tension and compression direction, rotational deformation and the axial relative deformation that thimble can be measured test specimen are converted into the relative displacement output of rotating between reflecting plate and the torsional displacement sensor, and the output of the relative displacement between axial reflecting plate and the shaft position sensor.Adjustment rotating shaft, riser, thimble length can change the measurement range of extensometer rotation direction; The length of adjusting supporting rod position, downside thin segment length or change thimble and spring leaf all can change the axial measurement range of extensometer.Supporting rod is the fulcrum of whole extensometer, and it is connected with outside support and extensometer can be fixed in the optional position, space, conveniently is installed on test specimen.
Adopt the present invention to test test specimen and draw-turn round process: extensometer should carry out strain when using for the first time demarcates, thereby can improve measuring accuracy.On quartzy thimble contact test specimen, test specimen produces axial deformation or rotational deformation under the effect of power, quartzy thimble is converted to relative displacement output with axial relative deformation by rotating shaft and spring leaf with the rotational deformation of test specimen, measure this changing value by two non-contact electric eddy shift sensors, the shift value that records and the electric signal of sensor are output into linear relationship.Millivolt magnitude voltage signals by the output of two current vortex sensors is amplified respectively through direct current amplifier, obtains positive and negative 5V (or 10V, decide on the range ability of AD plate) voltage and imports hyperchannel AD plate and carry out AD and change.At last, can axially changing into digital signal and export on computers and show or subsequent treatment is prepared against in storage by the AD plate with test specimen with the torsional strain value.The extensometer thimble adopts quartz pushrod then to can be used for the measurement and the control of high-temp strain.
Claims (1)
1, a kind of high frequency responding high temperature drawing-twisting fatigue extender, this fatigue extender comprises that two-way two leverages and displacement transducer constitute, it is characterized in that: two-way two leverages comprise two symmetrically arranged non-heavy wall section square stressed plates (1) that wait up and down, (11), counterpart end in the vertical heavy wall plate section of two stressed plates respectively connects a quartzy thimble (15) by pressing plate (14) and bolt (13), on two thin-walled part sections of two stressed plates, connect successively from the inside to the outside and draw-turn round Force receiver, torsion-testing device and extension test device, described drawing-turn round Force receiver comprise that two rotating shafts (3) rotating shaft is connecting spring leaf (2) and the supporting rod (10) that is connected on the spring leaf constitutes; Described torsion-testing device comprises that the torsional displacement sensor (9) that rotates reflecting plate (8) and be connected supporting riser (4) constitutes; Described extension test device comprises that being bearing in the axial reflecting plate (6) and the shaft position sensor (7) that connect riser (5) constitutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410072189 CN1281938C (en) | 2004-09-27 | 2004-09-27 | High frequency responding high temperature drawing-twisting fatigue extender |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410072189 CN1281938C (en) | 2004-09-27 | 2004-09-27 | High frequency responding high temperature drawing-twisting fatigue extender |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1587970A true CN1587970A (en) | 2005-03-02 |
| CN1281938C CN1281938C (en) | 2006-10-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410072189 Expired - Fee Related CN1281938C (en) | 2004-09-27 | 2004-09-27 | High frequency responding high temperature drawing-twisting fatigue extender |
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| Country | Link |
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| CN (1) | CN1281938C (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013044455A1 (en) * | 2011-09-28 | 2013-04-04 | 华东理工大学 | Extensometer for amplifying measurement of high temperature structural deformation |
| CN105066872A (en) * | 2015-09-17 | 2015-11-18 | 北京科技大学 | Strain gauge parameter electric logging device applied to temperature range from room temperature to high temperature of 1200 DEG C |
| CN107044937A (en) * | 2017-04-13 | 2017-08-15 | 天津大学 | A kind of tension-torsion extensometer of ball bearing linkage |
| CN108195665A (en) * | 2018-03-20 | 2018-06-22 | 天津大学 | For the extensometer of high temperature single shaft experiment |
| CN108956281A (en) * | 2018-06-04 | 2018-12-07 | 中国航发北京航空材料研究院 | A kind of fixation device of sheet metal drawing by high temperature extensometer |
| CN110726611A (en) * | 2019-10-29 | 2020-01-24 | 中国工程物理研究院化工材料研究所 | Stress concentration test device and test method for brittle material perforated plate |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102174945B (en) * | 2011-01-29 | 2012-12-19 | 东北大学 | Mechanical driving device with output displacement and torsion |
-
2004
- 2004-09-27 CN CN 200410072189 patent/CN1281938C/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013044455A1 (en) * | 2011-09-28 | 2013-04-04 | 华东理工大学 | Extensometer for amplifying measurement of high temperature structural deformation |
| GB2498269A (en) * | 2011-09-28 | 2013-07-10 | Univ East China Science & Tech | Extensometer for amplifying measurement of high temperature structural deformation |
| GB2498269B (en) * | 2011-09-28 | 2017-08-09 | Univ East China Science & Tech | Extensometer for measuring high-temperature structural deformations by magnification |
| CN105066872A (en) * | 2015-09-17 | 2015-11-18 | 北京科技大学 | Strain gauge parameter electric logging device applied to temperature range from room temperature to high temperature of 1200 DEG C |
| CN105066872B (en) * | 2015-09-17 | 2017-10-24 | 北京科技大学 | One kind is used for room temperature to 1200 DEG C of high temperature strain foil parameter electric probe devices |
| CN107044937A (en) * | 2017-04-13 | 2017-08-15 | 天津大学 | A kind of tension-torsion extensometer of ball bearing linkage |
| CN107044937B (en) * | 2017-04-13 | 2023-05-26 | 天津大学 | Tension torsion extensometer with spherical bearing linkage |
| CN108195665A (en) * | 2018-03-20 | 2018-06-22 | 天津大学 | For the extensometer of high temperature single shaft experiment |
| CN108195665B (en) * | 2018-03-20 | 2023-09-12 | 天津大学 | Extensometer for high Wen Shanzhou experiment |
| CN108956281A (en) * | 2018-06-04 | 2018-12-07 | 中国航发北京航空材料研究院 | A kind of fixation device of sheet metal drawing by high temperature extensometer |
| CN108956281B (en) * | 2018-06-04 | 2021-02-09 | 中国航发北京航空材料研究院 | Fixing device of sheet metal high temperature tensile extensometer |
| CN110726611A (en) * | 2019-10-29 | 2020-01-24 | 中国工程物理研究院化工材料研究所 | Stress concentration test device and test method for brittle material perforated plate |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1281938C (en) | 2006-10-25 |
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