CN204902759U - Horizontal extensometer of variant is answered to resistance - Google Patents
Horizontal extensometer of variant is answered to resistance Download PDFInfo
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- CN204902759U CN204902759U CN201520691472.6U CN201520691472U CN204902759U CN 204902759 U CN204902759 U CN 204902759U CN 201520691472 U CN201520691472 U CN 201520691472U CN 204902759 U CN204902759 U CN 204902759U
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Abstract
The utility model relates to a horizontal extensometer of variant is answered to resistance, including elastic element, elastic element has the first elasticity cantilever and the second elasticity cantilever of symmetry, resistance strain gauge glues the card on the elasticity cantilever, first and second connecting pieces are fixed respectively on the first and second elasticity cantilevers, first cutting edge and second cutting edge symmetry and blade set up relatively, first cutting edge portability is adjusted ground and is set up on first connecting piece, second cutting edge portability is adjusted ground and is set up on the second connecting piece. First and second cutting edges, the first and second elasticity cantilevers are located the coplanar. The utility model discloses a gauge length is adjustable at 0 -25mm's within range, avoids or eliminate extensometer produced moment of torsion in test procedure.
Description
Technical field
The utility model is about a kind of measurement mechanism for detecting the radial deformation that sheet metal and bar produce in tension test, particularly relates to the horizontal extensometer of a kind of resistance-strain type.
Background technology
There is the horizontal extensometer of manufacturer production though in the past domestic, be only gauge length 12.5mm, gauge length 20mm, gauge length 25mm tri-kinds of modes.Above-mentioned three series products are all be above-mentioned three fixing gauge length designs, and at the beginning of design, do not consider the problem that gauge length is adjustable, its structure itself determines can only be measured fixed measure.So its product only can be tested 12.5mm, 20mm, 25mm tri-standard-sized test specimens, and can run into the test specimen outside many above-mentioned three sizes in real work, it is just helpless.Also there is the clear and definite explanation only doing the detection of calibration distance in its manufacturer in its product sample and instructions.
Thus, the present inventor relies on experience and the practice of being engaged in relevant industries for many years, proposes the horizontal extensometer of a kind of resistance-strain type, to overcome the defect of prior art.
Utility model content
The purpose of this utility model is to provide a kind of resistance-strain type horizontal extensometer, its test specimen standard size that can measure and gauge length adjustable in the scope of 0-25mm, add measurement range.
Another object of the present utility model is to provide a kind of resistance-strain type horizontal extensometer, avoids or eliminate the moment of torsion that extensometer produces in test process.
The purpose of this utility model is achieved in that the horizontal extensometer of a kind of resistance-strain type, and described extensometer comprises:
Flexible member, described flexible member has an axis of symmetry, and the first elastic cantilever and second elastic cantilever of described flexible member are symmetrical arranged about the described axis of symmetry;
Resistance strain gage, described resistance strain gage is sticky to be posted on described first elastic cantilever and the second elastic cantilever;
Coupling arrangement, described coupling arrangement comprises the first web member, the second web member, and described first web member, the second web member to be separately fixed on described first elastic cantilever and the second elastic cantilever and to be symmetrical arranged about the described axis of symmetry;
Clamping device, described clamping device comprises the first blade and the second blade, and symmetrical and cutting edge is oppositely arranged about the described axis of symmetry for described first blade and the second blade; Described first blade can move along the direction perpendicular to described first elastic cantilever and adjustably be arranged on described first web member; Described second blade can move along the direction perpendicular to described second elastic cantilever and adjustably be arranged on described second web member.
In a better embodiment of the present utility model, the first blade and the second blade are positioned at same plane, and the planes overlapping at the plane at described first blade and the second blade place and described first elastic cantilever and the second elastic cantilever place.
In a better embodiment of the present utility model, clamping device also comprises the first holder and the second holder, described first holder can move along the direction perpendicular to described first elastic cantilever and adjustably be arranged on described first web member, and described second holder can move along the direction perpendicular to described second elastic cantilever and adjustably be arranged on described second web member; The side that described first holder is relative with the second holder is fixed with described first blade and the second blade respectively.
In a better embodiment of the present utility model, resistance strain gage has four, wherein two panels resistance strain gage glues the relative both sides being posted on described first elastic cantilever generation elastic deformation and forms first group of resistance strain gage, and two panels resistance strain gage glues the relative both sides being posted on described second elastic cantilever generation elastic deformation and forms second group of resistance strain gage in addition; The position of described first group of resistance strain gage and second group of resistance strain gage is symmetrical about the described axis of symmetry, the full-bridge circuit and four sheet resistance foil gauges are electrically connected to form.
In a better embodiment of the present utility model, be connected with between the first web member, the second web member by described first web member and the second web member to together with the elastic body drawn close.
In a better embodiment of the present utility model, elastic body is extension spring, and described extension spring one end is fixed on described first web member, and the other end of described extension spring is fixed on described second web member.
In a better embodiment of the present utility model, the first holder is slidably connected on described first web member, and relatively fixing by trip bolt; Described second holder is slidably connected on described second web member, and relatively fixing by trip bolt.
In a better embodiment of the present utility model, flexible member is fixed in housing, and described first elastic cantilever and the second elastic cantilever reach described outside; Described housing is also fixed with the auxiliary supports that can be resisted against and test specimen play supplemental support effect.
In a better embodiment of the present utility model, flexible member is U-shaped, is made up of carbon element alloy steel, and through modulation treatment.
From the above mentioned, horizontal extensometer of the present utility model is by the position of adjustment holder on web member and fix with screw-driving, the distance between recycling vernier caliper measurement two blade, thus makes gauge length continuously adjustabe in the scope of 0-25mm.The planes overlapping at the plane at two blade places and two elastic cantilever places, can ensure that the elastic deformation direction of two elastic cantilevers is consistent with the elastic deformation direction of test specimen, avoid the generation of moment of torsion, thus ensures the measuring accuracy of extensometer.
Accompanying drawing explanation
The following drawings is only intended to schematically illustrate the utility model and explain, does not limit scope of the present utility model.Wherein:
Fig. 1: be the structural representation of the horizontal extensometer of the utility model.
Embodiment
In order to there be understanding clearly to technical characteristic of the present utility model, object and effect, now contrast accompanying drawing and embodiment of the present utility model is described.
As shown in Figure 1, the utility model provides the horizontal extensometer 100 of a kind of resistance-strain type, comprises flexible member 10, resistance strain gage, coupling arrangement and clamping device.Flexible member 10 has an axis of symmetry, and the first elastic cantilever 11 of flexible member 10 and the second elastic cantilever 12 are symmetrical arranged about the axis of symmetry.Resistance strain gage is sticky to be posted on the first elastic cantilever 11 and the second elastic cantilever 12, and resistance strain gage can be electrically connected composition single arm type, double-arm (half-bridge) or full-bridge type bridge diagram and measure.Coupling arrangement is used for flexible member 10 to be connected with clamping device, comprise the first web member 21, second web member 22, first web member 21, second web member 22 to be separately fixed on the first elastic cantilever 11 and the second elastic cantilever 12 and to be symmetrical arranged about the axis of symmetry.The first web member 21, second web member 22 synchronizing moving is driven while the first elastic cantilever 11 and the second elastic cantilever 12 do elastic deformation.Clamping device is for being clamped in the surface of test specimen, and symmetrical and cutting edge is oppositely arranged about the axis of symmetry to comprise the first blade 31 and the second blade 32, first blade 31 and the second blade 32.First blade 31 is parallel with the bearing of trend of the second elastic cantilever 12 with the first elastic cantilever 11 respectively with the cutting edge of the second blade 32, and the first blade 31 can clamp test specimen in the mode vertical with test specimen surface with the second blade 32.First blade 31 can move along the direction perpendicular to the first elastic cantilever 11 and adjustably be arranged on the first web member 21; Second blade 32 can move along the direction perpendicular to the second elastic cantilever 12 and adjustably be arranged on the second web member 22.First blade 31 regulates along the direction perpendicular to the first elastic cantilever 11, second blade 32 regulates along the direction perpendicular to the second elastic cantilever 12, the distance between the cutting edge of two relative blades can be made to change, by regulating the spacing between the first blade 31 and the second blade 32, gauge length continuously adjustabe in the scope of 0-25mm can be made.It is made to produce the moment of torsion of torsion in order to avoid the first blade 31 when measuring and the second blade 32 produce to be applied on elastic cantilever, first blade 31 and the second blade 32 are positioned at same plane, and the planes overlapping at the plane at the first blade 31 and the second blade 32 place and the first elastic cantilever 11 and the second elastic cantilever 12 place.
During measurement, the first blade 31 and the second blade 32 clamp relative two measured surfaces of test specimen along the direction perpendicular to tensile force, also opened with certain angle thus have prestress between the first elastic cantilever 11 and the second elastic cantilever 12.When test specimen is on testing machine during under tension, test specimen can be elongated, its lateral dimension can shrink, namely test specimen Tensile produces elastic deformation, test specimen produces the elastic deformation of contraction in the plane vertical with tensile force, its drawdown deformation amount passes through blade, web member is delivered on elastic cantilever, elastic cantilever can produce the distortion consistent with test specimen transversely deforming direction thereupon, the distance be close between the first blade 31 of relative two measured surfaces of test specimen and the second blade 32 reduces thereupon, by resistance strain gage and an exportable electric signal being proportional to test piece deformation.The elastic deformation direction of two elastic cantilevers is consistent with the elastic deformation direction of test specimen, avoids the generation of moment of torsion.
As an embodiment of the present utility model, flexible member 10 is U-shaped sheet spring, can be also other shape such as V-arrangement, be made up of carbon element alloy steel, and through modulation treatment.Such as make U-shaped flexible member 10 with alloy steel 40GrNiMo, after heat treatment reach optimum tenacity and elasticity.The link of U-shaped flexible member 10 is fixed by screws in housing 40, and it is outside that the first elastic cantilever 11 and the second elastic cantilever 12 reach housing 40.First web member 21 and the second web member 22 are the turning part of L shape, one end of first web member 21 is fixedly connected on the end of the first elastic cantilever 11, the corner part of the first web member 21 is arranged towards the direction away from the axis of symmetry, and a connecting lever 211 of the first web member 21 extends forward and its bearing of trend is parallel with the bearing of trend of the first elastic cantilever 11; The connection of the connection of the second web member 22 and the second elastic cantilever 12, the first web member 21 and the first elastic cantilever 11 is symmetrical about the axis of symmetry, repeats no more.
Clamping device also comprises the first holder 51 and the second holder 52, first holder 51 can move along the direction perpendicular to the first elastic cantilever 11 and adjustably be arranged on the first web member 21, and the second holder 52 can move along the direction perpendicular to the second elastic cantilever 12 and adjustably be arranged on the second web member 22.The side that first holder 51 is relative with the second holder 52 is fixed with the first blade 31 and the second blade 32 respectively.Concrete, first holder 51 and the second holder 52 are straight rod-shaped, the connecting lever 211 that first web member 21 extends forward is provided with perforation, and the first holder 51 is inserted in this perforation and is slidably connected, and by trip bolt, the first holder 51 is relative fixing with the first web member 21; Same structure, the second holder 52 is slidably connected in the perforation of the connecting lever 221 that the second web member 22 extends forward, and relatively fixing by trip bolt.To be fixed with screw-driving, the distance between recycling vernier caliper measurement two blade by the position of adjustment holder on web member, thus make gauge length continuously adjustabe in the scope of 0-25mm.
Further, be connected with between the first web member 21, second web member 22 by the first web member 21 and the second web member 22 to together with the elastic body drawn close.Elastic body is extension spring 60, and extension spring 60 one end is fixed by screws on the first web member 21, and the other end of extension spring 60 is fixed by screws on the second web member 22, and the fixed position at extension spring 60 two ends is symmetrical about the axis of symmetry.By arranging extension spring 60, two blades can be made to be fastened on the surface of test specimen more reliably, avoiding holding force not enough and producing mobile.In the present embodiment, elastic cantilever, web member, holder and blade are positioned at same plane.
Further, resistance strain gage has four, wherein two panels resistance strain gage glues and is posted on the relative both sides that elastic deformation occurs the first elastic cantilever 11 and forms first group of resistance strain gage, and two panels resistance strain gage glues and is posted on the relative both sides that elastic deformation occurs the second elastic cantilever 12 and forms second group of resistance strain gage in addition.The position of first group of resistance strain gage and second group of resistance strain gage is symmetrical about the axis of symmetry, concrete, link (i.e. the root of the elastic cantilever) 10mm of the sticky note positional distance U-shaped flexible member 10 of resistance strain gage on elastic cantilever.Four sheet resistance foil gauges are electrically connected to form full-bridge circuit.In full-bridge circuit metering circuit, by the opposite side of identical for stress direction two resistance strain gage access electric bridges, by the adjacent side of contrary for stress direction two resistance strain gage access electric bridges.Adopt full-bridge circuit that extensometer can be made to obtain the brachium pontis coefficient of 4 times, thus obtain higher sensitivity.
Further, housing 40 is also fixed with the auxiliary supports 70 that can be resisted against and test specimen play supplemental support effect.Auxiliary supports 70 adopts steel wire to make, one end is fixed on housing 40, the other end extends to forward the side of the first blade 31 and the second blade 32, and forms butting section 71 to horizontal expansion, and the plane at this butting section 71 and the first blade 31 and the second blade 32 place has certain spacing.Butting section 71 is resisted against on test specimen, whole extensometer is played to the effect of a supplemental support.
From the above mentioned, the utility model can be tested sheet material and column test specimen.To be fixed with screw-driving, the distance between recycling vernier caliper measurement two blade by the position of adjustment holder on web member, thus make gauge length continuously adjustabe in the scope of 0-25mm.The planes overlapping at the plane at two blade places and two elastic cantilever places, can ensure that the elastic deformation direction of two elastic cantilevers is consistent with the elastic deformation direction of test specimen, avoid the generation of moment of torsion, thus ensures the measuring accuracy of extensometer.After tested, extensometer precision meets the accuracy requirement of relative error 0.5%.
The foregoing is only the schematic embodiment of the utility model, and be not used to limit scope of the present utility model.Any those skilled in the art, equivalent variations done under the prerequisite not departing from design of the present utility model and principle and amendment, all should belong to the scope of the utility model protection.
Claims (9)
1. the horizontal extensometer of resistance-strain type, it is characterized in that, described extensometer comprises:
Flexible member, described flexible member has an axis of symmetry, and the first elastic cantilever and second elastic cantilever of described flexible member are symmetrical arranged about the described axis of symmetry;
Resistance strain gage, described resistance strain gage is sticky to be posted on described first elastic cantilever and the second elastic cantilever;
Coupling arrangement, described coupling arrangement comprises the first web member, the second web member, and described first web member, the second web member to be separately fixed on described first elastic cantilever and the second elastic cantilever and to be symmetrical arranged about the described axis of symmetry;
Clamping device, described clamping device comprises the first blade and the second blade, and symmetrical and cutting edge is oppositely arranged about the described axis of symmetry for described first blade and the second blade; Described first blade can move along the direction perpendicular to described first elastic cantilever and adjustably be arranged on described first web member; Described second blade can move along the direction perpendicular to described second elastic cantilever and adjustably be arranged on described second web member.
2. the horizontal extensometer of resistance-strain type as claimed in claim 1, it is characterized in that, described first blade and the second blade are positioned at same plane, and the planes overlapping at the plane at described first blade and the second blade place and described first elastic cantilever and the second elastic cantilever place.
3. the horizontal extensometer of resistance-strain type as claimed in claim 2, it is characterized in that, described clamping device also comprises the first holder and the second holder, described first holder can move along the direction perpendicular to described first elastic cantilever and adjustably be arranged on described first web member, and described second holder can move along the direction perpendicular to described second elastic cantilever and adjustably be arranged on described second web member; The side that described first holder is relative with the second holder is fixed with described first blade and the second blade respectively.
4. the horizontal extensometer of resistance-strain type as claimed in claim 3, it is characterized in that, described resistance strain gage has four, wherein two panels resistance strain gage glues the relative both sides being posted on described first elastic cantilever generation elastic deformation and forms first group of resistance strain gage, and two panels resistance strain gage glues the relative both sides being posted on described second elastic cantilever generation elastic deformation and forms second group of resistance strain gage in addition; The position of described first group of resistance strain gage and second group of resistance strain gage is symmetrical about the described axis of symmetry, the full-bridge circuit and four sheet resistance foil gauges are electrically connected to form.
5. the horizontal extensometer of resistance-strain type as claimed in claim 4, is characterized in that, be connected with between described first web member, the second web member by described first web member and the second web member to together with the elastic body drawn close.
6. the horizontal extensometer of resistance-strain type as claimed in claim 5, it is characterized in that, described elastic body is extension spring, and described extension spring one end is fixed on described first web member, and the other end of described extension spring is fixed on described second web member.
7. the horizontal extensometer of resistance-strain type as claimed in claim 6, it is characterized in that, described first holder is slidably connected on described first web member, and relatively fixing by trip bolt; Described second holder is slidably connected on described second web member, and relatively fixing by trip bolt.
8. the horizontal extensometer of resistance-strain type as claimed in claim 7, it is characterized in that, described flexible member is fixed in housing, and described first elastic cantilever and the second elastic cantilever reach described outside; Described housing is also fixed with the auxiliary supports that can be resisted against and test specimen play supplemental support effect.
9. the horizontal extensometer of resistance-strain type as claimed in claim 8, it is characterized in that, described flexible member is U-shaped, is made up of carbon element alloy steel, and through modulation treatment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520691472.6U CN204902759U (en) | 2015-09-08 | 2015-09-08 | Horizontal extensometer of variant is answered to resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520691472.6U CN204902759U (en) | 2015-09-08 | 2015-09-08 | Horizontal extensometer of variant is answered to resistance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204902759U true CN204902759U (en) | 2015-12-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520691472.6U Active CN204902759U (en) | 2015-09-08 | 2015-09-08 | Horizontal extensometer of variant is answered to resistance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204902759U (en) |
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2015
- 2015-09-08 CN CN201520691472.6U patent/CN204902759U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Horizontal extensometer of variant is answered to resistance Effective date of registration: 20180926 Granted publication date: 20151223 Pledgee: Bank of Beijing Zhongguancun branch, Limited by Share Ltd, Haidian Pledgor: Beijing TIME High-technology Ltd. Registration number: 2018990000883 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20191022 Granted publication date: 20151223 Pledgee: Bank of Beijing Zhongguancun branch, Limited by Share Ltd, Haidian Pledgor: Beijing TIME High-technology Ltd. Registration number: 2018990000883 |