CN205209879U - A tensile testing machine anchor clamps for screw -thread steel prestressing force is experimental - Google Patents
A tensile testing machine anchor clamps for screw -thread steel prestressing force is experimental Download PDFInfo
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- CN205209879U CN205209879U CN201521050315.3U CN201521050315U CN205209879U CN 205209879 U CN205209879 U CN 205209879U CN 201521050315 U CN201521050315 U CN 201521050315U CN 205209879 U CN205209879 U CN 205209879U
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Abstract
The utility model relates to a tensile testing machine anchor clamps for screw -thread steel prestressing force is experimental for carry out tensile test to the screw -thread steel, include: the anchor clamps main part, including the groove that is used for placing the screw -thread steel, the anchor clamps main part is run through along vertical direction of anchor clamps main part in the groove to arrange on the upper surface of anchor clamps main part, and the basal portion, being located the lower surface of anchor clamps main part, can fix anchor clamps in order to carry out tensile test on the testing machine through the basal portion. The utility model discloses a tensile testing machine anchor clamps can solve effectively when operation the screw -thread steel sample skid and the problem of centre gripping unstability etc.
Description
Technical field
The utility model relates to pulling experiment equipment, is specifically related to a kind of tension tester clamp for the test of screw-thread steel prestress.
Background technology
At present, when carrying out the tension test of material especially screw-thread steel, counter stress delta data is needed to gather, to determine whether the performance of material conforms to quality requirements.
But, when the material adopting traditional grip of testing machine clamping screw-thread steel such, because screw-thread steel outside has screw thread, therefore surface of contact is made to diminish thus sample can not firmly clamp, make to be difficult to clamp sample material, make sample material be easy to skidding even to drop, thus make troubles to test and cause test failure.
Summary of the invention
The utility model provides a kind of tension tester clamp for the test of screw-thread steel prestress, and it can overcome certain or multiple defect that exist in prior art.
The utility model provides a kind of tension tester clamp, carries out tension test, comprising for double thread steel:
Jig main body, comprise the groove for placing screw-thread steel, groove runs through jig main body along the longitudinal direction of jig main body, and is arranged on the upper surface of jig main body; And
Base portion, is positioned on the lower surface of jig main body, fixture can be fixed on testing machine by base portion to carry out tension test.
According to the tension tester clamp that the utility model provides, when carrying out the prestress tensile test of screw-thread steel, effectively can solve the problem that sample skids, thus stablize and reliably clamp screw-thread steel.
In a specific embodiment of the present utility model, the surface of groove is provided with multiple chase, these chases can with the engagement threads on screw-thread steel.There is the tension tester clamp of this structure, can more firmly retaining thread steel curved beam.
In a specific embodiment of the present utility model, the surface of groove is non-smooth surface.The non-smooth surface of groove is formed by screw thread.But the utility model is not limited to this, such as, this non-smooth surface can be formed by annular knurl.There is the tension tester clamp of this set, the contact friction force with screw-thread steel can be increased further.
In a specific embodiment of the present utility model, the groove on jig main body is semi-circular groove, thus the contact area of groove and screw-thread steel is increased, and increases contact force further.
In a specific embodiment of the present utility model, the width that jig main body is provided with the part of groove is less than the width of the lower surface place part of jig main body, and this set can alleviate the weight of fixture, and handled easily person operate.
In a specific embodiment of the present utility model, base portion length is in a longitudinal direction identical with the length of jig main body, base portion width is in a lateral direction less than the width of jig main body, fixture can be made to be stably retained in tension tester and can handled easily person grasp by this set.
In addition, the spacing between the chase on groove is less than the spacing between the screw thread on the outside surface of conventional screw-thread steel sample, and be conventional screw-thread steel outside surface on the integral multiple of flight pitch.
The utility model provides a kind of tension tester clamp, effectively can solve the sample when operating and skid and clamping problem built on the sand etc.
Accompanying drawing explanation
Fig. 1 is the front view of tension tester clamp of the present utility model;
Fig. 2 is the rear view of this tension tester clamp;
Fig. 3 is the left view of this tension tester clamp;
Fig. 4 is the vertical view of this tension tester clamp; And
Fig. 5 is the schematic diagram in each region when sample after sample is pulled off is shown.
Embodiment
The embodiment of tension tester clamp of the present utility model is described in detail below in conjunction with accompanying drawing.
Fig. 1 is the front view of tension tester clamp of the present utility model, shows the jig main body 1 of this fixture.Fig. 2 is the rear view of this tension tester clamp, shows jig main body 1 and the base portion 2 of fixture.Fig. 3 is the left view of this tension tester clamp, shows jig main body 1 and the base portion 2 of fixture.Fig. 4 is the vertical view of this tension tester clamp, shows the groove 3 on jig main body 1.
As depicted in figs. 1 and 2, tension tester clamp comprises jig main body 1 and base portion 2.Jig main body 1 is for placing screw-thread steel sample, and base portion 2 is positioned on the lower surface of jig main body 1, fixture can be fixed on testing machine by this base portion 2 to carry out tension test.
Particularly as seen from Figure 4, jig main body 1 comprises the groove 3 for placing screw-thread steel sample, and the shape of this groove 3 is semicircle, but groove 3 also can be arbitrary circular shape.It can also be seen that from Fig. 4, the width being provided with the part of groove 3 of jig main body 1 is less than the width of the lower surface place part of jig main body 1, can alleviate the weight of fixture like this, saves material and handled easily.
Further, as shown in Figure 1, groove 3 runs through jig main body 1 along the longitudinal direction of jig main body 1, and is arranged on the upper surface of jig main body 1.The surface of groove 3 is provided with multiple chase 4, and the shape and size of these chases 4 can match with the shape and size of the screw thread on conventional screw-thread steel.
Such as, the spacing between these chases 4 is less than the spacing between the screw thread on the outside surface of conventional screw-thread steel sample, and be conventional screw-thread steel outside surface on the integral multiple of flight pitch.In addition, the lead angle of chase 4 is between 75 ° to 85 °.
Be it can also be seen that by Fig. 1, the surface of groove 3 is the surface of Non-smooth surface.Particularly, the surface of the Non-smooth surface of groove 3 can be formed by fine thread, as shown at 5, which in turns increases the contact friction force of sample.
Shown in Fig. 3 and Fig. 4, base portion 2 length is in a longitudinal direction identical with the length of jig main body 1, base portion 2 width is in a lateral direction less than the width of jig main body 1, and the fixture arranged thus can increase gripping performance and can alleviate the weight of fixture, thus convenient operation person uses.But those skilled in the art also it is contemplated that other arrangement of base portion 2.
In addition, as shown in Figure 4, the width of the part contacted with the lower surface of jig main body 1 of base portion 2 is less than the width of the part away from jig main body 1, and this stepped appearance of base portion 2 arranges convenient operation, and person grasps fixture when operating.
The course of work of the present utility model is below described.
1) provide according to two fixtures of the present utility model;
2) base portion of two fixtures is fixed in the corresponding recesses on testing machine, the groove 3 of these two fixtures is relatively arranged, and these two fixtures can be arranged to be shifted together;
3) screw-thread steel sample is arranged between the groove of these two fixtures, and these two fixtures mobile opposite to each other, thus clamping screw-thread steel sample, wherein, nominal diameter d≤the 50mm of screw-thread steel sample, such as, and the minimum drift of sample between fixture is determined, in the scope of 300 to 550 according to the nominal diameter of sample;
4) arrange two identical fixtures at the other end of screw-thread steel, the position of these two fixtures can be fixed;
5) within the scope of sample drift, the equidistant mark of 10mm or 5mm is evenly divided into;
6) two fixtures that can be shifted are moved, so that the tension test carrying out screw-thread steel sample can be started, until sample fracture.
7) time as illustrated sample after sample is pulled off each region Fig. 5 shown in, A is clamp area, B is measurement zone, C is constriction, select Y and V two mark, distance between these two marks at least should be 100mm before tension test, two marks all should be positioned at fixture from breakaway poing side farthest, the distance that two marks leave fixture all should be not less than the nominal diameter d (getting the greater of the two) of 20mm or screw-thread steel sample, and two marks should be not less than 50mm or 2d (getting the greater of the two) with the distances between breakaway poing.
According to above step, the percentage of total elongation of sample under maximum force can be calculated.
The tension tester clamp that the utility model provides effectively can solve the screw-thread steel sample when operating and skids and clamp unstable etc. problem.
The foregoing is only the specific embodiment of utility model, is not will impose any restrictions the utility model, everyly to carry out etc. by changing and modifying, according to the utility model all within the category of the art of this patent protection scheme to it.
Claims (7)
1. a tension tester clamp, carry out tension test for double thread steel, it is characterized in that, comprising:
Jig main body, comprise the groove for placing screw-thread steel, groove runs through jig main body along the longitudinal direction of jig main body, and is arranged on the upper surface of jig main body; And
Base portion, is positioned on the lower surface of jig main body, fixture can be fixed on testing machine by base portion to carry out tension test.
2. tension tester clamp according to claim 1, is characterized in that, the surface of groove is provided with multiple chase, and these chases can with the engagement threads on screw-thread steel.
3. tension tester clamp according to claim 1 and 2, is characterized in that, the surface of groove is non-smooth surface.
4. tension tester clamp according to claim 3, is characterized in that, the non-smooth surface of groove is formed by screw thread.
5. tension tester clamp according to claim 1 and 2, is characterized in that, the groove on jig main body is semi-circular groove.
6. tension tester clamp according to claim 1, is characterized in that, the width that jig main body is provided with the part of groove is less than the width of the lower surface place part of jig main body.
7. tension tester clamp according to claim 1, is characterized in that, base portion length is in a longitudinal direction identical with the length of jig main body, and base portion width is in a lateral direction less than the width of jig main body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521050315.3U CN205209879U (en) | 2015-12-16 | 2015-12-16 | A tensile testing machine anchor clamps for screw -thread steel prestressing force is experimental |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521050315.3U CN205209879U (en) | 2015-12-16 | 2015-12-16 | A tensile testing machine anchor clamps for screw -thread steel prestressing force is experimental |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205209879U true CN205209879U (en) | 2016-05-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521050315.3U Active CN205209879U (en) | 2015-12-16 | 2015-12-16 | A tensile testing machine anchor clamps for screw -thread steel prestressing force is experimental |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205209879U (en) |
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2015
- 2015-12-16 CN CN201521050315.3U patent/CN205209879U/en active Active
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |