CN204101377U - Thin plate band permanent distortional stress corrosion test fixture - Google Patents
Thin plate band permanent distortional stress corrosion test fixture Download PDFInfo
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- CN204101377U CN204101377U CN201420638965.9U CN201420638965U CN204101377U CN 204101377 U CN204101377 U CN 204101377U CN 201420638965 U CN201420638965 U CN 201420638965U CN 204101377 U CN204101377 U CN 204101377U
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Abstract
The utility model relates to a kind of thin plate band permanent distortional stress corrosion test fixture, carry out permanent distortional stress corrosion test for fixing thin plate band sample to be tested, it comprises and to be horizontally disposed with and the support supply sample level to insert, the fixed pin being fixedly connected with support and sample, one end have screw rod and the other end has the guide finger of the draw-in groove of confession sample level insertion, the nut matched with the screw rod on guide finger, the pin that is fixedly connected with guide finger and sample; One end guide finger with draw-in groove is arranged in support, and the screw rod of guide finger extends to outside support through support, and nut is arranged at outside shown support.Clamp structure of the present utility model is simple, cost is low, manually can load and implement the permanent distortional stress corrosion test of thin plate band easily, can comparatively accurate Control Assay deflection size keep the constant of sample deformation, the stress corrosion crack behavior under different distortion state can be contrasted, save material and laboratory equipment money.
Description
Technical field
The utility model relates to material corrosion technical field of measurement and test, is specially a kind of thin plate band permanent distortional stress corrosion test fixture, the combined action being applicable to study stress and corrosion on the impact of thin plate band, to evaluate the military service performance of thin plate band.
Background technology
Stress corrosion crack is due to corrosion cracking process caused under stress and corrosion environment synergy, produces certain hidden danger to the hardware service safety of equipment carrying.It occurs often at industrial circles such as oil, chemical industry, the energy, and the therefore combined action of research material constant deformation and environment, the safety in utilization of evaluating material and life-span seem particularly important.
The method that current research stress corrosion is commonly used has three kinds: permanent distortion, constant load and slow strain rate tension.In order to simulate the on-the-spot stress condition of component, generally select constant strain method, its outstanding advantages is that multiple sample can carry out simultaneously, sample conditions and environment are convenient to control, the imposed deformation amount of sample can accurately record, and is a kind of quantitative test method.At present, equipment mainly drawing machine (or universal testing machine) and the stress loop (or spring assembly) that use of the method.The former tests accurately, but apparatus expensive and floor area large, carry and lay equal inconvenience; Simple, the applicable bulge test of the latter's structure, but because the extension of sample may cause relaxing of spring or afterburning torsion to cause sample deformation during aximal deformation value.Meanwhile, thin plate band should not adopt specimen shape or the size of constant load method (U-shaped bending method, C shape bending method, cantilever method etc.) and slow strain rate tension method.Therefore, need to design a set of permanent deformation fixture, the shortcoming that can overcome the said equipment again can in conjunction with the advantage of the two, and energy is effective for thin plate band simultaneously.
Summary of the invention
The purpose of this utility model is to provide a kind of fixture being applicable to carry out thin plate band constant strain method stress corrosion (cracking) test.
For achieving the above object, the technical solution adopted in the utility model is:
A kind of thin plate band permanent distortional stress corrosion test fixture, carry out permanent distortional stress corrosion test for fixing thin plate band sample to be tested, it comprises and to be horizontally disposed with and the support supply described sample level to insert, the fixed pin being fixedly connected with described support and described sample, one end have screw rod and the other end has the guide finger of the draw-in groove for the insertion of described sample level, the nut matched with the screw rod on described guide finger, the pin that is fixedly connected with described guide finger and described sample; The one end described guide finger with described draw-in groove is arranged in described support, and the screw rod of described guide finger extends to outside described support through described support, and described nut is arranged at outside shown support.
Preferably, the bottom surface of described support is made up of projection and countersink, and described fixed pin is positioned at described countersink place and vertically arranges, and the end face of described fixed pin is mutually concordant with described projection.
Preferably, described pin is vertically arranged, and its end face is higher than described projection.
Preferably, the edge of described support has the arc groove matched with the diameter of described fixed pin, and described fixed pin is arranged in described arc groove.
Preferably, the bottom surface of described support offers through hole, and described pin is arranged in described through hole.
Preferably, packing ring is provided with between described nut and described support.
Preferably, the internal thread on the external thread on the screw rod of described guide finger and described nut is fine thread.
Because technique scheme is used, the utility model compared with prior art has following advantages: clamp structure of the present utility model is simple, cost is low, manually can load and implement the permanent distortional stress corrosion test of thin plate band easily, can comparatively accurate Control Assay deflection size keep the constant of sample deformation, the stress corrosion crack behavior under different distortion state can be contrasted, save material and laboratory equipment money.
Accompanying drawing explanation
Accompanying drawing 1 is the schematic diagram of thin plate band sample to be tested.
Accompanying drawing 2 is the schematic front view of fixture of the present utility model.
Accompanying drawing 3 is the elevational schematic view of furniture of the present utility model.
In above accompanying drawing: 1, sample; 2, support; 3, fixed pin; 4, guide finger; 5, nut; 6, pin; 7, packing ring; 8, projection section; 9, body part; 10, through hole; 11, arc groove; 12, draw-in groove; 13, screw rod.
Embodiment
Below in conjunction with embodiment shown in the drawings, the utility model is further described.
Embodiment one: a kind of thin plate band permanent distortional stress corrosion test fixture, carries out permanent distortional stress corrosion test for the thin plate band sample 1 to be tested fixed as shown in Figure 1.
Shown in accompanying drawing 2 and accompanying drawing 3, described fixture comprises support 2, fixed pin 3, guide finger 4, nut 5 and pin 6.
Support 2 roughly takes advantage of rectangular parallelepiped and horizontal positioned, it has projection section 8 and body part 9, projection section 8 is positioned at an end of body part 9, and projection section 8 protrudes from body part 9 in upper and lower both sides, thus the bottom surface of this support 2 is made up of two parts: the countersink being positioned at the projection on projection section 8 and being positioned on body part 9.Support 2 inside hollows out, and the end opens of the body part 9 of support 2 has a square hole, and the length and width size of this square hole and the generous size of sample 1 match, and sample 1 level can be inserted in support 2 by this square hole.The bottom surface of support 2 offers rectangular through hole 10.
Fixed pin 3 is for fixed support 2 and sample 1.Offer an arc groove 11 in the end edge of the body part 9 of support 2, the diameter of this arc groove 11 and the diameter of fixed pin 3 match.In order to use this holder sample 1 to test, sample 1 offers the through hole matched with fixed pin 3 size.Sample 1 is inserted after in support 2, vertically insert fixed pin 3 and make it successively through the arc groove 11 on support 2 and the through hole on sample 1, thus both support 2 and sample 1 is fixing.Fixed pin 3 has a stub end, usually makes this stub end down, is located at the countersink place of the bottom surface of support 2.Further, the maintenance horizontality that during in order to make test, fixture and sample 1 can be stable, the end face of the stub end of this fixed pin 3 needs mutually concordant with the bottom surface of the projection section 8 of support 2, and namely the end face of fixed pin 3 is mutually concordant with the projection of the bottom surface of support 2.
One end of guide finger 4 offers size and sample 1 and matches and insert draw-in groove 12 wherein for sample 1 level, and the other end is then provided with a screw rod 13.The one end this guide finger 4 with draw-in groove 12 is arranged in support 2, its cross section is that the space in the figure and overall dimensions and support 2 that are made up of two parallel lines and two ends circular arc matches, it is fastened in the pickup groove of the mating shapes that the projection section 8 of support 2 is offered, and the screw rod 13 of guide finger 4 then extends to outside support 2 through the circular hole on the projection section 8 of support 2.Nut 5 matches with the screw rod 13 on guide finger 4 outside support 2, and is also provided with packing ring 7 between the end face of nut 5 and support 2.External thread on the screw rod 13 of guide finger 4 and the internal thread on nut 5 are fine thread.
Pin 6 is arranged in the through hole 10 on support 2, and it is for being fixedly connected with guide finger 4 and sample 1.Guide finger 4 offers on the position of draw-in groove 12 and sample 1 and offer through hole accordingly, in the through hole on both pin 6 inserts vertically, the two is fixed.And the lower surface of pin 6 needs steady to ensure support 2 higher than the projection of support 2 bottom surface.Usually, the center of pin 6, the center of fixed pin 3 are all positioned on the axis of support 2.
The hole wall of the square hole on above-mentioned support 2 and hollow out the inwall in space, the outside surface of fixed pin 3, the outside surface of pin 6, the outside surface of guide finger 4 and on the cell wall of draw-in groove all through mechanical buffing process.
This fixture is used to carry out the constant strain method stress corrosion (cracking) test process of thin plate band sample 1 as follows:
1, round point shape steel seal on the mark of sample 1 parallel end both sides in advance, at Stereo microscope or observed under electron microscope and survey record two dot spacing D1;
2, after sample 1 and fixture being assembled according to Fig. 2 and Fig. 3, free-hand pre-load nut 5;
3, be positioned on horizontal stand with the bottom surface of the projection section 8 of the stub end end face of fixed pin 3 and support 2 for supporting surface, level meter be placed in support 2 upper surface, measure its horizontal performance, if out-of-level, then need the position adjusting fixed pin 3;
4, after adjusting the horizontal performance of support 2 upper surface, by the two side ends of bench vice clamp bracket 2, whole fixture is fixed, with torque spanner rotating nut 5, the moment of record torque spanner display, when moment reaches the moment needed for test, unload lower clamp, and fixture is placed on Stereo microscope or observed under electron microscope and survey record two dot spacing D2, the deflection △ D=D2-D1 of sample 1, if △ D is less than the deflection needed for test, then repeat aforesaid operations, till reaching required deflection;
5, the fixture loaded is put into specific environmental chamber, start test.
The mode Control Assay length direction deflection that this fixture is loaded by bolt, change its stress, utilize the size of sample parallel-segment Deformation calculation loading stress simultaneously, study the stress cracking behavior under different stress condition, its structure is simple, volume is little, cost is low, efficiency is high, especially be convenient to stress contrast, have good practicality to the evaluation of thin plate band military service behavior in the environment.
Above-described embodiment, only for technical conceive of the present utility model and feature are described, its object is to person skilled in the art can be understood content of the present utility model and implement according to this, can not limit protection domain of the present utility model with this.All equivalences done according to the utility model Spirit Essence change or modify, and all should be encompassed within protection domain of the present utility model.
Claims (7)
1. a thin plate band permanent distortional stress corrosion test fixture, carry out permanent distortional stress corrosion test for fixing thin plate band sample to be tested, it is characterized in that: it comprises and to be horizontally disposed with and the support supply described sample level to insert, the fixed pin being fixedly connected with described support and described sample, one end have screw rod and the other end has the guide finger of the draw-in groove for the insertion of described sample level, the nut matched with the screw rod on described guide finger, the pin that is fixedly connected with described guide finger and described sample; The one end described guide finger with described draw-in groove is arranged in described support, and the screw rod of described guide finger extends to outside described support through described support, and described nut is arranged at outside shown support.
2. thin plate band according to claim 1 permanent distortional stress corrosion test fixture, it is characterized in that: the bottom surface of described support is made up of projection and countersink, described fixed pin is positioned at described countersink place and vertically arranges, and the end face of described fixed pin is mutually concordant with described projection.
3. thin plate band according to claim 2 permanent distortional stress corrosion test fixture, it is characterized in that: described pin is vertically arranged, and its end face is higher than described projection.
4. thin plate band according to claim 1 permanent distortional stress corrosion test fixture, is characterized in that: the edge of described support has the arc groove matched with the diameter of described fixed pin, and described fixed pin is arranged in described arc groove.
5. thin plate band according to claim 1 permanent distortional stress corrosion test fixture, it is characterized in that: the bottom surface of described support offers through hole, described pin is arranged in described through hole.
6. thin plate band according to claim 1 permanent distortional stress corrosion test fixture, is characterized in that: be provided with packing ring between described nut and described support.
7. thin plate band according to claim 1 permanent distortional stress corrosion test fixture, is characterized in that: the internal thread on the external thread on the screw rod of described guide finger and described nut is fine thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420638965.9U CN204101377U (en) | 2014-10-30 | 2014-10-30 | Thin plate band permanent distortional stress corrosion test fixture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420638965.9U CN204101377U (en) | 2014-10-30 | 2014-10-30 | Thin plate band permanent distortional stress corrosion test fixture |
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| Publication Number | Publication Date |
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| CN204101377U true CN204101377U (en) | 2015-01-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420638965.9U Active CN204101377U (en) | 2014-10-30 | 2014-10-30 | Thin plate band permanent distortional stress corrosion test fixture |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104697873A (en) * | 2015-03-06 | 2015-06-10 | 合肥通用机械研究院 | Sulfide stress corrosion cracking testing apparatus |
| CN106908377A (en) * | 2017-04-18 | 2017-06-30 | 沈阳航空航天大学 | A kind of pre-etching experiment sample mount |
-
2014
- 2014-10-30 CN CN201420638965.9U patent/CN204101377U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104697873A (en) * | 2015-03-06 | 2015-06-10 | 合肥通用机械研究院 | Sulfide stress corrosion cracking testing apparatus |
| CN104697873B (en) * | 2015-03-06 | 2017-08-25 | 合肥通用机械研究院 | A kind of sulfide-stress cracking experimental rig |
| CN106908377A (en) * | 2017-04-18 | 2017-06-30 | 沈阳航空航天大学 | A kind of pre-etching experiment sample mount |
| CN106908377B (en) * | 2017-04-18 | 2023-09-26 | 沈阳航空航天大学 | Sample support for pre-corrosion test |
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