CN2160900Y - High-linearity large-range E-shaped clamp type stressometer - Google Patents
High-linearity large-range E-shaped clamp type stressometer Download PDFInfo
- Publication number
- CN2160900Y CN2160900Y CN 93203149 CN93203149U CN2160900Y CN 2160900 Y CN2160900 Y CN 2160900Y CN 93203149 CN93203149 CN 93203149 CN 93203149 U CN93203149 U CN 93203149U CN 2160900 Y CN2160900 Y CN 2160900Y
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- fixture block
- extensometer
- strain gauge
- elastic skeleton
- utility
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Abstract
The utility model relates to a high linearity and large measuring range E-shaped clamp type stressometer, which is used for material mechanical property experiments. The utility model mainly comprises a strain gauge and a clamping mechanism. The strain gauge is composed of an E-shaped elastic frame which has a rake angle of alpha and a strain plate which is stuck on the elastic frame. The clamping mechanism comprises a fixture block and a spring clamp; the upper side of the fixture block is provided with distance mark positioning cutting edges for samples and a groove and a cutting edge which are used for positioning the strain gauge. When the utility model is used, the fixture block is clamped on the samples by the spring clamp, the distance of the positioning cutting edge can be adjusted, and the strain gauge is positioned on the cutting edge in the groove. Compared with the existing stressometer, the utility model has the advantages of high linearity, large measuring range, small size, simple structure, light weight and convenient operation.
Description
The utility model relates to Strain Extensometer, is used for the material mechanical performance experiment.
In the metal material mechanics performance test, power and distortion are two parameters the most basic, and nearly all mechanical performance index all is the function of these two variablees.Therefore, in various Mechanics Performance Testing processes exactly the dynamic change of ergometry and distortion be very important.The measurement of distortion is finished by the displacement extensometer that is installed on the sample.In the evolution of extensometer, there is following type to develop: Martin's formula optics extensometer, percentage tabular form extensometer, foil gauge folder formula extensometer.The quality of weighing extensometer has following several technical indicators: range of (1) extensometer and strain deviation; (2) physical dimension of extensometer and weight; (3) whether the repeatability of extensometer indicating value and operation be convenient.The current foil gauge folder formula extensometer that generally uses mainly is made up of strain gauge and clamping device, by clamping device strain gauge is clamped on the sample.Cantilever beam type folder formula extensometer and π type folder formula extensometer are the main patterns of this class extensometer.Cantilever beam type extensometer (accompanying drawing 1) middle part is a rigid body, be subjected to not produce distortion after the clamping, foil gauge 12 is one group two pairs, be attached to the both sides of semi-girder 13,14 roots respectively, two arms 23,24 of π type folder formula extensometer (accompanying drawing 2) are rigid body, are subjected to not produce distortion after the clamping, and the crossbeam 25 at middle part is an elastic body, be subjected to producing the pure bending distortion after the clamping, four foil gauges 22 are attached to the both sides at variable shaped beam middle part.Above-mentioned two types extensometer, though all have advantage in light weight and easy to use, and can be connected on and carry out auto-mapping on registering instrument or the printer, the shortcoming all elastic range because of bent beam is little, and deviation is big, and range is little, and the use of extensometer is restricted.Application number is the axial extensometer of strain-type that 90217149.6 Chinese utility application instructions has shown a kind of high linearity, wide range, shown in Fig. 3,4.The major defect of this extensometer is a complex structure, especially clamping device (accompanying drawing 4) needs a series of parts, as substrate 41, pedestal 42, guide rod 43, conduit 44, shaft coupling 45, dise knife sword 46, spring 47, steel wire 48 etc., not only physical dimension is big, weight is big, and the processing and manufacturing trouble, the extensometer operation is also inconvenient.
The purpose of this utility model is the Strain Extensometer of a kind of novel high linearity wide range of design, dwindles the physical dimension of extensometer and simplify the structure of Strain Extensometer under the situation of identical range.
High linearity wide range E type folder formula extensometer described in the utility model (accompanying drawing 5) mainly comprises strain gauge and clamping device (accompanying drawing 7).Strain gauge comprises elastic skeleton 54 and the foil gauge 62 that is attached on the elastic skeleton.Elastic skeleton 54 is for having the E type elastic skeleton (accompanying drawing 6) at α inclination angle, form by 65,66 and two semi-girders 63,64 of two intermediate transverse girders, semi-girder 63,64 front ends have the blade 61 that is connected usefulness with fixture block, between two intermediate transverse girders 65,66 is indeformable rigid body, foil gauge 62 is attached to the middle part of semi-girder 63,64, clamping device comprises fixture block 52 and spring clamp 51, spring clamp is made with steel wire, one end of spring clamp passes the hole 83(accompanying drawing 8 on the fixture block), location blade 81 and groove 82 and the blade 85 of laying strain gauge are arranged on the fixture block., and can slide the support plate 84 that also has the size and dimension with sample to change on the fixture block with the sample distortion in order to make fixture block and sample axis keeping parallelism.
The utility model has the advantages that:
(1) 65,66 and two semi-girders 63,64 of two of E type elastic skeleton 54 intermediate transverse girders are participated in the measurement of displacement simultaneously, have enlarged the range of extensometer.
(2) foil gauge 62 on the E type elastic skeleton 54 is attached to the place of the middle deflection root of cantilever, and resistance strain gage produces inelastic strain when having avoided the extensometer wide range, has enlarged the range of extensometer.
(3) by the semi-girder in the suitable selection E type elastic skeleton and the ratio of intermediate transverse girder length, adjust the α inclination angle and the thickness of cantilever, can make the deviation of semi-girder and the deviation of intermediate transverse girder play the effect of cancelling out each other, make the deviation of extensometer obtain minimum.
(4) clamping device is simple and reliable, and part is few, easily makes, and in light weight, volume is little, is convenient to operation.
(5) clamping device can make the original gauge length random variation before stretching, and is not limited to a certain numerical value.
(6) can break and do not damage extensometer with sample.
Accompanying drawing 1 cantilever beam type extensometer elastic skeleton figure.Wherein 12 is foil gauge, and 13,14 is semi-girder.
Accompanying drawing 2 π type extensometer elastic skeleton figure.Wherein 22 is foil gauge, and 23,24 is semi-girder, and 25 is crossbeam.
The strain gauge of the axial extensometer of high linearity wide range strain-type of accompanying drawing 3 prior arts
The clamping device of the axial extensometer of high linearity wide range strain-type of accompanying drawing 4 prior arts.Wherein 41 is that substrate, 42 is that pedestal, 43 is that guide rod, 44 is that conduit, 45 is that shaft coupling, 46 is that dise knife sword, 47 is that spring, 48 is a steel wire.
The wiring layout of accompanying drawing 5 extensometers described in the utility model.Wherein 51 is spring clamp, and 52 is fixture block, and 53 is sample, and 54 is elastic skeleton.
The E type elastic skeleton of accompanying drawing 6 extensometers described in the utility model.Wherein 61 is blade, and 62 is foil gauge, and 63,64 is semi-girder, and 65,66 is intermediate transverse girder.
The clamping device wiring layout of accompanying drawing 7 extensometers described in the utility model
The fixture block front elevation of accompanying drawing 8 extensometers described in the utility model.Wherein 81 are the location blade, and 82 for laying the groove of strain gauge, and 83 is the hole on the fixture block, and 84 is support plate, and 85 for laying the blade of strain gauge.
Accompanying drawing 9 is that the A of accompanying drawing 8 is to view
The spring clamp of accompanying drawing 10 extensometers described in the utility model
The demarcation electric circuit diagram of accompanying drawing 11 extensometers described in the utility model.Wherein 110 is resistance strain gage, and 111 is direct supply, and 112 is digital voltmeter.
The following examples are that E type folder formula extensometer described in the utility model is further described:
The described E type folder formula extensometer of present embodiment (accompanying drawing 5) is made up of strain gauge and clamping device (accompanying drawing 7).Strain gauge comprises E type elastic skeleton 54(accompanying drawing 6) and be attached to foil gauge 62 on the elastic skeleton.Elastic skeleton is actual to be the composite type of the cantilever beam type folder formula extensometer and the π type folder formula extensometer at band α inclination angle.Cantilever and intermediate transverse girder are participated in deformation measurement simultaneously, and elastic skeleton 54 is strong by height ratio, high elastic modulus, the wide alpha+beta titanium alloys of limit of elasticity are made, and has advantage in light weight, that amount of elasticity is big.This elastic skeleton 54 is to adopt the computer program-control wire cutting machine that the titanium slab integral is processed, and size is accurate, does not produce looseningly during use, can improve the repeatability of extensometer.Elastic skeleton 54 is the E type, and two cantilevers all outwards open the α angle, is rigid body between two intermediate transverse girders, does not produce distortion.The position of foil gauge 62 is deflection root place in the middle of semi-girder, and each cantilever pastes one group of two foil gauge 62.The demarcation electric circuit diagram of extensometer as shown in figure 11.When demarcating the gamut of extensometer, adopted the power supply of 3 volts direct supplys 111 as resistance strain gage 110 composition electric bridges.Bridge circuit output directly shows the millivolt value with 7 bit digital voltage tables 112, has saved intermediate amplifier, has therefore reduced the error that intermediate amplifier brings at timing signal.When demarcating 1/10 grade of range of extensometer,, adopt direct current to do bridge power supply for 4.5 volts in order to improve the output voltage values of bridge circuit.
The clamping device of extensometer is made up of fixture block 52 and spring clamp 51.Fixture block 52 usefulness straight carbon steels are made, support plate 84 and location blade 81(accompanying drawing 8,9 are housed) on the surface of contact of fixture block and sample, support plate 84 usefulness titanium alloys are made, location blade 81 usefulness high-carbon steel materials are made, be embedded in the groove of fixture block 52 bottom surfaces, spring clamp 51(accompanying drawing 10 arranged on the fixture block 52), make with spring steel wire, can freely pass through the hole on the fixture block 83 shown in the accompanying drawing 8, strain gauge is placed on the blade 85 in the groove 82 by self elastic force.When using extensometer, the fixture block that only needs to install elastic skeleton pushes sample 53(accompanying drawing 5 by spring clamp) on, determine that by demarcating size two distances between the blade of location get final product.After sample was elongated, the extensometer edge of a knife changed with the lengthening of location blade distance, notes the displacement of identified as samples distance.
E type folder formula described in the utility model is extended in respect of EX15-15, EX25-25, and plurality of specifications such as EX50-50, its technical specification and the scope of application are as follows:
Specification: EX15-15
Physical dimension: 70 * 40 * 12mm
Gauge length: 15mm
Maximum deviation: 0-1.5mm range 0.000039 strain
0.000629 strain of 0-15mm range
Flexible member (size mm):
Arm length: 60
Intermediate transverse girder is long: 24
Thickness: B
1=1(semi-girder)
B
2=0.9(intermediate transverse girder)
Inclination alpha=4.8 °
The scope of application:
The test tension test
The various disproportional elongation stress σ of the short sample of 3 standards
0.01, σ
0.05, σ
0.1, σ
0.2Deng and extensibility δ, and can break with sample and draw the integrally stretching curve, also can be used for a piece of wood serving as a brake to halt a carriage K that ruptures
1CTest.
Specification: EX25-25
Physical dimension: 90 * 50 * 14mm
Gauge length: 25mm
Maximum deviation: 0-2.5mm range 0.000037 strain
0.000427 strain of 0-25mm range
Flexible member (size mm):
Arm length: 80
Intermediate transverse girder is long: 32
Thickness: B
1=1(semi-girder)
B
2=0.9(intermediate transverse girder)
Inclination alpha: 7.2 °
The scope of application:
The test tension test
The various non-long ratio elongation stress σ of the short sample of 5 standards
0.01, σ
0.05, σ
0.1, σ
0.2Deng and extensibility δ, and can break with sample and draw integrally stretching curve (σ-ε).
Specification: EX50-50
Physical dimension: 110 * 80 * 16mm
Gauge length: 50mm
Maximum deviation: 0-5.0mm range 0.000043 strain
0.000476 strain of 0-50mm range
Flexible member (size mm):
Arm length: 100
Intermediate transverse girder is long: 54
Thickness: 1
Inclination alpha: 8.6 °
The scope of application:
The test tension test
The various disproportional elongation stress σ of the short sample of 10 standards
0.01, σ
0.05, σ
0.1, σ
0.2Deng and extensibility δ, and can break with sample and draw integrally stretching curve (σ-ε).
The E type folder formula extensometer range deviation from linearity that below is all size described in the utility model is analyzed summary sheet.
| Model | EX?15-15 | EX?25-25 | EX?50-50 | |||
| Brachium mm | 60 | 80 | 100 | |||
| Gauge length mm | 15 | 25 | 50 | |||
| Range mm | 1.5 | 15 | 2.5 | 25 | 5.0 | 50 |
| The ratio % of maximum linear deviation and range | 0.039 | 0.063 | 0.037 | 0.043 | 0.043 | 0.04 |
| The maximum strain deviation | 0.000039 | 0.000629 | 0.000037 | 0.000427 | 0.000043 | 0.000476 |
Claims (2)
1, high linearity wide range E type folder formula extensometer mainly comprises strain gauge and clamping device, strain gauge comprises elastic skeleton and the foil gauge that is attached on the elastic skeleton, it is characterized in that elastic skeleton is the E type elastic skeleton (54) that has the α inclination angle, by two intermediate transverse girders (65), (66) and two semi-girders (62), (63) form, the semi-girder front end has the blade (61) that links to each other with fixture block, be indeformable rigid body between two intermediate transverse girders, foil gauge (62) is attached to the middle part of semi-girder, clamping device comprises fixture block (52) and spring clamp (51), spring clamp is made with steel wire, one end of spring clamp passes the hole on the fixture block, location blade (81) is arranged on the fixture block and lay the groove (82) and the blade (85) of strain gauge, the support plate (84) that also has the size and dimension with sample to change on the fixture block.
2, high linearity wide range E type folder formula extensometer according to claim 1 is characterized in that elastic skeleton adopts high-elastic whole titanium alloy processing E type elastic skeleton.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93203149 CN2160900Y (en) | 1993-02-18 | 1993-02-18 | High-linearity large-range E-shaped clamp type stressometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93203149 CN2160900Y (en) | 1993-02-18 | 1993-02-18 | High-linearity large-range E-shaped clamp type stressometer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2160900Y true CN2160900Y (en) | 1994-04-06 |
Family
ID=33787104
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93203149 Expired - Lifetime CN2160900Y (en) | 1993-02-18 | 1993-02-18 | High-linearity large-range E-shaped clamp type stressometer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2160900Y (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100445723C (en) * | 2005-12-09 | 2008-12-24 | 中国科学院金属研究所 | Method for mixing extension meter in hgih temperature strain fatigue test |
| CN101571468B (en) * | 2009-06-15 | 2011-09-21 | 扬州大学 | Automatic detector for textural properties of hardness and viscosity of cooked rice grains |
| CN103954512A (en) * | 2014-05-23 | 2014-07-30 | 上海核工程研究设计院 | Device and method for testing breaking tenacity of compact tension specimen in low-temperature environment |
| CN104729453A (en) * | 2015-03-17 | 2015-06-24 | 西安交通大学 | Sensor for measuring high-temperature both-way strain |
| CN106290000A (en) * | 2016-08-26 | 2017-01-04 | 中航动力股份有限公司 | A kind of sample for measuring high temperature fracture toughness and preparation method thereof |
| CN106289980A (en) * | 2016-09-14 | 2017-01-04 | 西安交通大学 | Extensometer test system under liquid environment |
| CN106610356A (en) * | 2015-10-22 | 2017-05-03 | 南京理工大学 | Micro tension measuring device |
| CN108562481A (en) * | 2018-04-16 | 2018-09-21 | 北京工业大学 | A kind of fixed extensometer blade rigid mount |
| 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 |
| CN110595873A (en) * | 2019-09-10 | 2019-12-20 | 华中科技大学 | Tensile sample gauge length and post-fracture gauge length measuring equipment |
-
1993
- 1993-02-18 CN CN 93203149 patent/CN2160900Y/en not_active Expired - Lifetime
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100445723C (en) * | 2005-12-09 | 2008-12-24 | 中国科学院金属研究所 | Method for mixing extension meter in hgih temperature strain fatigue test |
| CN101571468B (en) * | 2009-06-15 | 2011-09-21 | 扬州大学 | Automatic detector for textural properties of hardness and viscosity of cooked rice grains |
| CN103954512A (en) * | 2014-05-23 | 2014-07-30 | 上海核工程研究设计院 | Device and method for testing breaking tenacity of compact tension specimen in low-temperature environment |
| CN104729453A (en) * | 2015-03-17 | 2015-06-24 | 西安交通大学 | Sensor for measuring high-temperature both-way strain |
| CN104729453B (en) * | 2015-03-17 | 2017-10-20 | 西安交通大学 | A kind of sensor for measuring high temperature bi-directional strain |
| CN106610356A (en) * | 2015-10-22 | 2017-05-03 | 南京理工大学 | Micro tension measuring device |
| CN106290000A (en) * | 2016-08-26 | 2017-01-04 | 中航动力股份有限公司 | A kind of sample for measuring high temperature fracture toughness and preparation method thereof |
| CN106289980A (en) * | 2016-09-14 | 2017-01-04 | 西安交通大学 | Extensometer test system under liquid environment |
| CN106289980B (en) * | 2016-09-14 | 2019-03-01 | 西安交通大学 | Extensometer test macro under liquid environment |
| CN108562481A (en) * | 2018-04-16 | 2018-09-21 | 北京工业大学 | A kind of fixed extensometer blade rigid mount |
| CN108562481B (en) * | 2018-04-16 | 2021-01-05 | 北京工业大学 | Fixed extensometer cutting edge rigidity device |
| 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 |
| CN110595873A (en) * | 2019-09-10 | 2019-12-20 | 华中科技大学 | Tensile sample gauge length and post-fracture gauge length measuring equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |