CN204807394U - Two -way rib line anchor clamps face reinforcing bar tensile test machine - Google Patents
Two -way rib line anchor clamps face reinforcing bar tensile test machine Download PDFInfo
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- CN204807394U CN204807394U CN201520509630.1U CN201520509630U CN204807394U CN 204807394 U CN204807394 U CN 204807394U CN 201520509630 U CN201520509630 U CN 201520509630U CN 204807394 U CN204807394 U CN 204807394U
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Abstract
The utility model relates to a two -way rib line anchor clamps face reinforcing bar tensile test machine belongs to material test technical field. Including last pull end, lower pull end, go up pull end and be in the same place with the upper and lower series connection of stand that lower pull end passes through both ends, upper and lower pull end's middle part is provided with the reinforcing bar anchorage zone, and the reinforcing bar anchorage zone includes backing plate, rivet, fixed chuck spare and reinforcing bar chuck that left and right symmetry set up, and under and the pull end at last pull end is connected respectively through backing plate and rivet to fixed chuck spare, is in the same place through bayonet fixed between reinforcing bar chuck and the fixed chuck spare, the reinforcing bar chuck is provided with two -way rib line on being used for the relative anchor clamps face of two of centre gripping reinforcing bar sample, and two -way rib line to both sides slope 45, forms two -way diagonal rib line respectively. The utility model discloses on the basis of original reinforcing bar tensile test machine reinforcing bar chuck, realize improving the tensile degree of accuracy of reinforcing bar and success rate to the design that the anchor clamps face of reinforcing bar chuck increases the diagonal rib line, but the wide application is in reinforcing bar tensile test.
Description
Technical field
The utility model relates to a kind of steel bar stretching testing machine, and especially a kind of two-way rib line fixture face steel bar stretching testing machine, belongs to material test technical field.
Background technology
Reinforcing bar and concrete are the main materials forming building structure.Have good cohesive force between reinforcing bar and concrete, reinforcing bar and concrete temperature line expansion coefficient similar, more importantly reinforcing bar is wrapped in concrete the corrosion exempting from external environment, and concrete plays a very good protection to reinforcing bar.Reinforcing bar has good tensile property, and concrete has good compressive property, plays respective advantage co-operation therebetween, is the feature of reinforced concrete structure.So reinforcing bar and concrete energy co-operation, bear extraneous generalized force.In building structural materials, reinforcing bar is an important ingredient, and the quality of reinforcement property directly affects being suitable for and safety of structure.Therefore, reinforcing bar all needed to carry out necessary Performance Detection before for engineering construction.Wherein, steel bar mechanics performance is measured by the tension test of reinforcing bar.The tensile strength of reinforcing bar, length growth rate and yield strength are the most basic three mechanical performance indexs of reinforcing bar, and these three indexs are all obtained by steel bar stretching test.Therefore, the accuracy of steel bar stretching detection is most important.The fixture face of steel bar stretching testing machine is all generally the plane of line with ribbing, only has a tangent line with the contact of reinforcing bar, and fixture is worn rib line and be ensure that and can clamp between reinforcing bar and fixture, thus ensures the accuracy of steel bar stretching test.
Utility model content
The utility model binding reinforcement mechanics properties testing is tested, and proposes a kind of two-way rib line fixture face steel bar stretching testing machine.Time mainly in order to solve steel bar stretching, increase the technical matters clamping ability between reinforcing bar and fixture face.
The technical solution of the utility model is as follows:
A kind of two-way rib line fixture face steel bar stretching testing machine, comprises the end that stretches, lower stretching end, and described upper stretching end and lower stretching end are cascaded by the column at two ends is upper and lower, described column bottom joint test machine base; Described upper stretch end lower end in the middle part of and lower stretch end upper center be provided with Bar Anchorage district, in order to the reinforcing bar sample that stretches, described Bar Anchorage district comprises left and right symmetrically arranged backing plate, rivet, geometrical clamp head and reinforcing bar chuck, described geometrical clamp head is connected to upper stretching end and lower stretching end by backing plate and rivet, is fixed together between described reinforcing bar chuck and geometrical clamp head by bayonet socket; Described reinforcing bar chuck is provided with two-way rib line on the fixture face that two of clamping reinforcing bar sample are relative, and described two-way rib line tilts 45 ° respectively to both sides, forms two-way diagonal rib line.
Further, the bayonet projections of described reinforcing bar chuck divides slightly toward outer amplification, and the draw-in groove of described geometrical clamp head, slightly toward interior amplification, forms dove tail stuck fixing to ensure between reinforcing bar chuck and geometrical clamp head.
Further, the diameter of described reinforcing bar sample is not less than 25mm, and length is not less than 250mm+10d, and wherein, d is the diameter of reinforcing bar sample, and linear measure longimetry precision is 0.015mm.
Further, for the reinforcing bar sample of 25mm < d≤32mm, the upper and lower freedom length of described reinforcing bar sample is not less than 400mm; For the reinforcing bar sample of d > 32mm, the upper and lower freedom length of described reinforcing bar sample is not less than 500mm.
Further, described rivet is not less than 2 on each backing plate.
Beneficial effect:
When the most significant advantage of the utility model is steel bar stretching, adopts the two-way rib line design in fixture face, increase the friction force between reinforcing bar chuck and reinforcing bar, ensure that the accuracy that steel bar stretching is tested and success ratio.And the utility model adopts the two-way rib line design in fixture face, and cost is low, and applicability is strong, and accuracy rate is high.If this technology is applied, significant effect will be had in steel bar stretching test.
Accompanying drawing explanation
Fig. 1 is steel bar stretching testing machine schematic diagram;
Fig. 2 is end schematic diagram that testing machine stretches;
Fig. 3 is the A-A cut-open view of Fig. 2;
Fig. 4 is the B-B cut-open view of Fig. 2.
In figure, 1: Bar Anchorage district; 2: above stretch end; 3: under to stretch end; 4: reinforcing bar sample; 5: backing plate; 6: rivet; 7: geometrical clamp head; 8: reinforcing bar chuck; 9: fixture face; 10: rib line; 11: column.
Embodiment
As Figure 1-4, one of the present utility model two-way rib line fixture face steel bar stretching testing machine, it comprises stretching end 2, lower stretching end 3, upper stretching end 2 and lower stretching end 3 are cascaded by the column 11 at two ends is upper and lower, joint test machine base (as shown in Figure 1) bottom column 11.In the middle part of the lower end of upper stretching end 2 and the upper center of lower stretching end 3 be provided with Bar Anchorage district 1, in order to the reinforcing bar sample 4 that stretches.Bar Anchorage district 1 comprises left and right symmetrically arranged backing plate 5, rivet 6, geometrical clamp head 7 and reinforcing bar chuck 8 (as shown in Figure 2).Geometrical clamp head 7 is connected to upper stretching end 2 and lower stretching end 3 by backing plate 5 and rivet 6, and rivet 6 is not less than 2 on each backing plate 5.Be fixed together by bayonet socket between reinforcing bar chuck 8 and geometrical clamp head 7, wherein, the bayonet projections of reinforcing bar chuck 8 divides slightly toward outer amplification, and the draw-in groove of described geometrical clamp head 7, slightly toward interior amplification, forms dove tail stuck fixing to ensure between reinforcing bar chuck 8 and geometrical clamp head 7.Reinforcing bar chuck 8 is for the relative fixture face 9 of two of clamping reinforcing bar sample 4 is provided with two-way rib line 10, and two-way rib line 10 tilts 45 ° respectively to both sides, forms two-way diagonal rib line (as shown in Figure 4).
Wherein, the diameter of reinforcing bar sample 4 is not less than 25mm, and length is not less than 250mm+10d, and wherein, d is the diameter of reinforcing bar sample 4, and linear measure longimetry precision is 0.015mm.For the reinforcing bar sample 4 of 25mm < d≤32mm, the upper and lower freedom length of reinforcing bar sample 4 is not less than 400mm; For the reinforcing bar sample 4 of d > 32mm, the upper and lower freedom length of reinforcing bar sample 4 is not less than 500mm.
The test method of above-mentioned two-way rib line fixture face steel bar stretching testing machine, adopts following steps:
Step one: open computer and Acquisition Instrument, check and correction reinforcing bar sample 4, calculate reinforcing bar sample 4 nominal cross-sectional face area, the measurement of reinforcing bar sample 4 diameter should be accurate to 0.1mm, and the reinforcing steel bar scale distance length distance scaling instrument according to regulation marks original gauge length;
Step 2: reinforcing bar sample 4 is installed reinforcing bar chuck 8, simultaneously upper and lower reinforcing bar chuck 8 must be clamped on steel bar stretching testing machine geometrical clamp head 7 in side start test, test rate should be determined according to material character and test objective (specifically determine that mode belongs to and well known to a person skilled in the art prior art);
Step 3: measure yield strength: at reinforcing bar sample 4 elastic stage until yielding stage, the upper and lower segregation rate of testing machine reinforcing bar chuck 8 keeps constant, within the scope of 6-60MPa/s; Record power-extension curve or force-displacement curve, from curve read power decline first before maximum, force and disregard initial temporal effect time yielding stage minimum force or the constant force of yield point elongation;
Step 4: measure tensile strength: test for tensile strength speed is no more than 0.008/s in the strain rate of reinforcing bar sample 4 plastic range parallel length, in whole tension test process, guarantees that the reinforcing bar sample 4 clamped is subject to the effect of axial tension; Read the maximum, force after yielding stage or obtain tensile strength from the maximum, force that dynamometry scale reads process of the test divided by reinforcing bar sample 4 original cross-sectional area;
Step 5: measure elongation after fracture: use resolution to be less than the measurer of 0.1mm or measurement mechanism measures gauge length of having no progeny, be accurate to ± 0.25mm, reinforcing bar sample 4 breaking portion is carefully connected together, its axis is made to be on same straight line, measurement is had no progeny gauge length, if the place of breaking formed gap, this gap should count reinforcing bar sample 4 break after gauge length in;
Step 6: interpretation of result and process: according to test findings, calculates the numerical value needing to measure; If because misoperation, instrument failure or sample defect cause test failure, need again to test.
Be more than a kind of exemplary embodiment of the present utility model, concrete enforcement of the present utility model is not limited thereto.
Claims (5)
1. a two-way rib line fixture face steel bar stretching testing machine, comprise the end (2) that stretches, lower stretching end (3), described upper stretching end (2) and lower stretching end (3) are cascaded by the column (11) at two ends is upper and lower, described column (11) bottom joint test machine base, described upper stretching is held in the middle part of the lower end of (2) and the lower upper center stretching end (3) is provided with Bar Anchorage district (1), in order to the reinforcing bar sample that stretches (4), it is characterized in that: described Bar Anchorage district (1) comprises a left side, right symmetrically arranged backing plate (5), rivet (6), geometrical clamp head (7) and reinforcing bar chuck (8), described geometrical clamp head (7) is connected to upper stretching end (2) and lower stretching end (3) by backing plate (5) and rivet (6), be fixed together by bayonet socket between described reinforcing bar chuck (8) and geometrical clamp head (7), described reinforcing bar chuck (8) is for the relative fixture face (9) of two of clamping reinforcing bar sample (4) is provided with two-way rib line (10), described two-way rib line (10) tilts 45 ° respectively to both sides, forms two-way diagonal rib line.
2. two-way rib line fixture face according to claim 1 steel bar stretching testing machine, it is characterized in that: the bayonet projections of described reinforcing bar chuck (8) divides slightly toward outer amplification, the draw-in groove of described geometrical clamp head (7), slightly toward interior amplification, forms dove tail stuck fixing to ensure between reinforcing bar chuck (8) and geometrical clamp head (7).
3. two-way rib line fixture face according to claim 1 steel bar stretching testing machine, it is characterized in that: the diameter of described reinforcing bar sample (4) is not less than 25mm, length is not less than 250mm+10d, wherein, d is the diameter of reinforcing bar sample (4), and linear measure longimetry precision is 0.015mm.
4. two-way rib line fixture face according to claim 3 steel bar stretching testing machine, it is characterized in that: for the reinforcing bar sample (4) of 25mm < d≤32mm, described reinforcing bar sample (4) upper and lower freedom length is not less than 400mm; For the reinforcing bar sample (4) of d > 32mm, described reinforcing bar sample (4) upper and lower freedom length is not less than 500mm.
5. two-way rib line fixture face according to claim 1 steel bar stretching testing machine, is characterized in that: described rivet (6) is not less than 2 on each backing plate (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520509630.1U CN204807394U (en) | 2015-07-14 | 2015-07-14 | Two -way rib line anchor clamps face reinforcing bar tensile test machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520509630.1U CN204807394U (en) | 2015-07-14 | 2015-07-14 | Two -way rib line anchor clamps face reinforcing bar tensile test machine |
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| CN204807394U true CN204807394U (en) | 2015-11-25 |
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| CN201520509630.1U Expired - Fee Related CN204807394U (en) | 2015-07-14 | 2015-07-14 | Two -way rib line anchor clamps face reinforcing bar tensile test machine |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104990797A (en) * | 2015-07-14 | 2015-10-21 | 中震(北京)工程检测有限公司 | Bidirectional rib texture clamp surface reinforcing bar tension testing machine and testing method thereof |
| CN107643219A (en) * | 2017-08-07 | 2018-01-30 | 南京航空航天大学 | A kind of D braided composites high temperature tension test device and method |
| CN108548713A (en) * | 2018-03-29 | 2018-09-18 | 合肥工业大学 | A kind of amendable mobile test device and its test method |
| CN110044687A (en) * | 2019-04-12 | 2019-07-23 | 吉林建筑大学 | A kind of adjustable pullout tests fixture of thickness |
-
2015
- 2015-07-14 CN CN201520509630.1U patent/CN204807394U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104990797A (en) * | 2015-07-14 | 2015-10-21 | 中震(北京)工程检测有限公司 | Bidirectional rib texture clamp surface reinforcing bar tension testing machine and testing method thereof |
| CN107643219A (en) * | 2017-08-07 | 2018-01-30 | 南京航空航天大学 | A kind of D braided composites high temperature tension test device and method |
| CN108548713A (en) * | 2018-03-29 | 2018-09-18 | 合肥工业大学 | A kind of amendable mobile test device and its test method |
| CN110044687A (en) * | 2019-04-12 | 2019-07-23 | 吉林建筑大学 | A kind of adjustable pullout tests fixture of thickness |
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| C14 | Grant of patent or utility model | ||
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| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Address after: 100043 Shijingshan District, Yang Yang Street, No. 69, No. 1, building an international Park, Fu International Patentee after: ZHONGZHEN (BEIJING) ENGINEERING DETECTION CO.,LTD. Address before: 100043 Shijingshan, Yang Yang Street, No. 69, No. 1, building an international Park, Fu International Patentee before: ZHONGZHEN (BEIJING) ENGINEERING DETECTION Co.,Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151125 |
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| CF01 | Termination of patent right due to non-payment of annual fee |