CN106872276B - Tensile shear test tool for reinforcing steel bar spot welding joint - Google Patents
Tensile shear test tool for reinforcing steel bar spot welding joint Download PDFInfo
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- CN106872276B CN106872276B CN201710259816.XA CN201710259816A CN106872276B CN 106872276 B CN106872276 B CN 106872276B CN 201710259816 A CN201710259816 A CN 201710259816A CN 106872276 B CN106872276 B CN 106872276B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/04—Chucks
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/24—Investigating strength properties of solid materials by application of mechanical stress by applying steady shearing forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0017—Tensile
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0025—Shearing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0026—Combination of several types of applied forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/026—Specifications of the specimen
- G01N2203/0296—Welds
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/04—Chucks, fixtures, jaws, holders or anvils
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
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- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The utility model provides a tensile shear test tool for a reinforcing steel bar spot welding joint, which comprises a main body and welding spot fixing pliers; the main body is provided with a longitudinal groove and a transverse groove which are crossed, the upper end of the longitudinal groove is a blind end, the lower end of the longitudinal groove is an open end, and both ends of the transverse groove are open ends; the welding spot fixing clamp comprises a clamp body, a torsion spring, a rotating shaft and a clamp hook, wherein the rotating shaft is fixed at the middle section of the main body, the upper end of the clamp body is arranged on the torsion shaft through the torsion spring, and the clamp hook is positioned at the bottom of the clamp body and abuts against the bottom of the junction of the longitudinal groove and the transverse groove under the torsion action of the torsion spring. The tensile shear test tool for the reinforcement spot welding joint can simultaneously meet the welding spot test of a 90-degree reinforcement mesh and a special-shaped welding joint, and has the advantages of good stability, convenience in installation and high test efficiency.
Description
Technical Field
The utility model relates to a tool for testing the mechanical test of a reinforcing steel bar spot welding joint.
Background
The spot welding quality of reinforcing steel bars such as reinforcing steel bar welded meshes, welding trusses and the like which are common in the field of construction engineering mainly adopts a spot welding joint tensile shear test method to test whether the spot welding quality meets the requirement. However, the conventional tensile shear test device for the spot-welded joint of the reinforcing steel bar has the following problems: (1) The reinforcement spot welding joint is not easy to fix, the operation is complex, and the test efficiency is low; (2) In the test process, the transverse steel bars are easy to rotate and slide, and the test precision is affected; (3) There is no suitable test device for special-shaped welded joints (such as spot welded joints in reinforced truss floor carrier plates).
2005-01-05 discloses a shearing test fixture for welding spots of a steel bar welding net, which is disclosed in China with the publication number 2669173 and consists of a fixture, a V-shaped groove and a U-shaped groove on the fixture, and is characterized in that the fixture is a cube, the V-shaped groove is arranged at the position of the upper surface of the fixture, the U-shaped groove is arranged on the adjacent surface parallel to the V-shaped groove, the bottom surface of the U-shaped groove is a cylindrical surface, the symmetrical axis surface of the U-shaped groove is vertically symmetrical with the V-shaped groove, the two grooves are connected and intersected, and the symmetrical axis surface of the V-shaped groove is separated from the bottom line of the surface of the U-shaped groove (8) by a certain distance. Although the clamp can realize the mechanical test of the reinforcement spot welding joint, the clamp is not suitable for the mechanical test of the special-shaped welding joint, and all parts of the clamp are split parts and are combined again, so that the clamp is not integrally formed, the service life is easy to influence, and the clamp is unstable in test.
2016-03-30, chinese utility model with publication number 205120486U discloses a shear test fixture for welding spots of a steel bar welding net, wherein the fixture body is a cylinder, and a through hole is formed in the middle of the cylinder; the fixture is characterized in that the periphery of the vertical face of the fixture body is provided with a plurality of symmetrically arranged positioning bolts, and the fixture is simple in structure, durable in use and low in manufacturing cost, but is not suitable for mechanical testing of special-shaped welded joints.
To sum up, to the reinforcing bar spot welding joint, at present there is not better tensile shear test device yet, can satisfy 90 degrees reinforcing bar net and special-shaped welded joint's solder joint test simultaneously, and the installation is firm moreover, convenient operation.
Disclosure of Invention
The utility model aims to solve the technical problem of providing the tensile shear test tool for the reinforcing steel bar spot welding joint, which can simultaneously meet the welding spot test of a 90-degree reinforcing steel bar mesh and a special-shaped welding joint, and has the advantages of good stability, convenience in installation and high test efficiency.
The utility model is realized in the following way: a tensile shear test tool for a reinforcement spot welding joint comprises a main body and a welding spot fixing clamp;
the main body is provided with a longitudinal groove and a transverse groove which are crossed, the upper end of the longitudinal groove is a blind end, the lower end of the longitudinal groove is an open end, and both ends of the transverse groove are open ends;
the welding spot fixing clamp comprises a clamp body, a torsion spring, a rotating shaft and a clamp hook, wherein the rotating shaft is fixed at the middle section of the main body, the upper end of the clamp body is arranged on the torsion shaft through the torsion spring, and the clamp hook is positioned at the bottom of the clamp body and abuts against the bottom of the junction of the longitudinal groove and the transverse groove under the torsion action of the torsion spring.
Further, the steel bar fixing device further comprises two transverse steel bar fixing sleeves, wherein the inner ends of the two transverse steel bar fixing sleeves are open, the outer ends of the two transverse steel bar fixing sleeves are closed, the diameters of the two transverse steel bar fixing sleeves are larger than the diameters of the steel bars, and the two transverse steel bar fixing sleeves can be freely penetrated in the transverse grooves.
Further, the device also comprises a plurality of limit screws, wherein the limit screws penetrate into the longitudinal grooves from the back surfaces of the longitudinal grooves.
Further, the inner wall of the lower side of the transverse groove is an arc-shaped concave surface, and the arc-shaped concave surface narrows the notch of the transverse groove.
Furthermore, the clamp body of the welding spot fixing clamp is of an inverted triangle structure with a large upper part and a small lower part.
Further, the main body is a carbon steel bar with the diameter of 60mm, and the top of the main body is provided with a jaw clamping rod with the diameter of 20 mm.
Furthermore, the welding spot fixing clamp is detachably connected with the main body.
The utility model has the following advantages: the steel bar spot welding joint tensile shear test tool can realize the centering of vertical tensile steel bars by introducing the four-in-one design of the welding spot fixing jaw, the limit screw, the transverse steel bar fixing sleeve and the transverse steel bar anti-slip groove, is convenient to install, has high test efficiency and has better applicability to the special-shaped spot welding joint tensile shear test.
Drawings
The utility model will be further described with reference to examples of embodiments with reference to the accompanying drawings.
Fig. 1 is a front view of the tooling of the present utility model.
Fig. 2 is a schematic cross-sectional view of fig. 1 along C-C.
Fig. 3 is a top view of the tooling of the present utility model.
Fig. 4 is a front view of the tooling of the present utility model when testing a shaped spot weld joint.
Detailed Description
As shown in fig. 1 to 4, the tensile shear test fixture for the spot welding joint of the steel bar comprises a main body 1, a welding spot fixing clamp 2, two transverse steel bar fixing sleeves 3 and a plurality of limit screws 4.
The main body 1 is a carbon steel bar with the diameter of 60mm, and the top of the main body is provided with a jaw clamping rod 11 with the diameter of 20mm, so that the upper jaw of the testing machine can be conveniently clamped. The main body 1 is provided with a longitudinal groove 12 and a transverse groove 13, the longitudinal groove 12 and the transverse groove 13 are in cross intersection, the upper end of the longitudinal groove 12 is a blind end, the lower end is an open end, so that a longitudinal steel bar A can extend out from the lower end to form two stress ends with a jaw clamping rod 11, and both ends of the transverse groove 13 are open ends; the downside inner wall of horizontal recess 13 is arc concave surface 132, and this arc concave surface 132 makes the notch of horizontal recess 13 narrow to make horizontal recess 13 form horizontal reinforcing bar B anti-skidding recess, effectively prevent horizontal reinforcing bar from the notch roll-off, influence experimental stability.
The welding spot fixing clamp 2 comprises a clamp body 21, a rotating shaft 22, a torsion spring 23 and a clamp hook 24, wherein the clamp body 21 is of an inverted triangle structure with a large upper part and a small lower part. The rotating shaft 22 is fixed at the middle section of the main body 1, the upper end of the clamp body 21 is arranged on the torsion shaft 22 through a torsion spring 23, and the arrangement can be detachable connection arrangement, so that the welding spot fixing clamp 2 is detached from the main body 1 as a whole. The clamp hook 24 is positioned at the bottom of the clamp body 21 and abuts against the bottom of the junction of the longitudinal groove 12 and the transverse groove 13 under the torsion action of the torsion spring 23, so that the welding joint O position of the longitudinal steel bar A and the transverse steel bar B can be fastened from below, and when the longitudinal steel bar A and the jaw clamping rod 11 are stretched, the tension can be transmitted to the welding joint O position by the welding point fixing clamp 2, so that the stress of the welding joint O position can be tested. The welding spot fixing clamp 2 is mainly arranged to adapt to the tensile shear test of a non-90-degree cross welded reinforcing steel bar net (namely a special-shaped spot welding joint). Because the longitudinal grooves 12 and the transverse grooves 13 are crossed, and the longitudinal steel bars A and the transverse steel bars B are difficult to be correspondingly embedded into the longitudinal grooves 12 and the transverse grooves 13 even if the longitudinal grooves 12 and the transverse grooves 13 are cut, the transverse steel bars B need to be cut as short as possible until the transverse grooves are close to the welding joint positions, and at the moment, the transverse grooves 13 cannot support the transverse steel bars B or the welding joint, so that the welding joint O needs to be supported by the welding point fixing clamp 2, and the tensile force is transmitted to the welding joint O to be tested.
The inner ends of the two transverse reinforcement fixing sleeves 3 are opened, the outer ends of the two transverse reinforcement fixing sleeves are closed, the diameters of the two transverse reinforcement fixing sleeves 3 are larger than the diameters of the transverse reinforcement, the two transverse reinforcement fixing sleeves can be freely arranged in the transverse grooves 13 in a penetrating mode, the transverse reinforcement fixing sleeves 3 are sleeved at the two ends of the transverse reinforcement in use, so that the whole transverse reinforcement can be uniformly stressed in the stretching process, and the test precision is guaranteed.
The limit screw 4 penetrates into the longitudinal groove 12 from the back surface of the longitudinal groove, so that longitudinal steel bars in the longitudinal groove 12 can be resisted, and the longitudinal steel bars are prevented from being transversely offset in the test process.
The working principle of the tool disclosed by the utility model is as follows:
1. when the special-shaped spot welding joint is tested, a steel bar of a welding node is cut off from a steel bar net of the special-shaped spot welding joint, a longitudinal steel bar A on the welding node O is cut into a proper length, a transverse steel bar B is planted as short as possible, and only the position of the welding node O can be reserved, so that the welding node O can be smoothly embedded into the longitudinal groove 12 without being limited by the transverse groove 13; pulling the clamp body 21 of the welding spot fixing clamp 2 open, embedding the longitudinal steel bar A into the longitudinal groove 12, enabling the welding joint O to be positioned at the junction of the longitudinal groove 12 and the transverse groove 13, releasing the clamp body 21 of the welding spot fixing clamp 2, enabling the clamp hook 24 to resist to the lower part of the welding joint O under the action of the torsion spring 23, fixing the lower end of the longitudinal steel bar A, and starting the testing machine to apply upward pulling force to the jaw clamping rod 11 of the main body 1 for testing.
2. When testing a 90-degree cross welded reinforcing mesh, as shown in fig. 1 to 3, a welded-node reinforcing bar is cut off from the reinforcing mesh, and a longitudinal reinforcing bar a and a transverse reinforcing bar B on the welded node O are cut into appropriate lengths; the longitudinal steel bar A and the transverse steel bar B are respectively embedded into the longitudinal groove 12 and the transverse groove 13, the two ends of the transverse steel bar B are sleeved with the transverse steel bar fixing sleeve 3, then the lower end of the longitudinal steel bar A is fixed, and the testing machine is started to apply upward tension to the jaw clamping rod 11 of the main body 1 for testing. Since the longitudinal bars a and the transverse bars B are welded at 90 degrees, the welding point fixing clamp 2 may be used or not, if used, the clamp hook 24 may be made to resist the lower part of the welding point O by referring to the operation sequence of the non-90 degree cross welded reinforcing mesh, and if not used, the welding point fixing clamp 2 may be detached as a whole.
While specific embodiments of the utility model have been described above, it will be appreciated by those skilled in the art that the specific embodiments described are illustrative only and not intended to limit the scope of the utility model, and that equivalent modifications and variations of the utility model in light of the spirit of the utility model will be covered by the claims of the present utility model.
Claims (5)
1. A tensile shear test tool for a reinforcing steel bar spot welding joint is characterized in that: comprises a main body, welding spot fixing pliers, two transverse steel bar fixing sleeves and a plurality of limit screws;
the main body is provided with a longitudinal groove and a transverse groove which are crossed, the upper end of the longitudinal groove is a blind end, the lower end of the longitudinal groove is an open end, and both ends of the transverse groove are open ends;
the welding spot fixing clamp comprises a clamp body, a torsion spring, a rotating shaft and a clamp hook, wherein the rotating shaft is fixed at the middle section of the main body, the upper end of the clamp body is arranged on the rotating shaft through the torsion spring, and the clamp hook is positioned at the bottom of the clamp body and abuts against the bottom of the junction of the longitudinal groove and the transverse groove under the torsion action of the torsion spring; the inner ends of the two transverse steel bar fixing sleeves are open, the outer ends of the two transverse steel bar fixing sleeves are closed, and the diameters of the two transverse steel bar fixing sleeves are larger than the diameters of the steel bars and can be freely penetrated in the transverse grooves; the limit screw penetrates into the longitudinal groove from the back surface of the longitudinal groove.
2. The steel bar spot welding joint tensile shear test tool according to claim 1, wherein: the inner wall of the lower side of the transverse groove is an arc-shaped concave surface which narrows the notch of the transverse groove.
3. The steel bar spot welding joint tensile shear test tool according to claim 1, wherein: the clamp body of the welding spot fixing clamp is of an inverted triangle structure with a large upper part and a small lower part.
4. The steel bar spot welding joint tensile shear test tool according to claim 1, wherein: the main body is a carbon steel bar with the diameter of 60mm, and the top of the main body is provided with a jaw clamping rod with the diameter of 20 mm.
5. The steel bar spot welding joint tensile shear test tool according to claim 1, wherein: the welding spot fixing clamp is detachably connected with the main body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710259816.XA CN106872276B (en) | 2017-04-20 | 2017-04-20 | Tensile shear test tool for reinforcing steel bar spot welding joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710259816.XA CN106872276B (en) | 2017-04-20 | 2017-04-20 | Tensile shear test tool for reinforcing steel bar spot welding joint |
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| Publication Number | Publication Date |
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| CN106872276A CN106872276A (en) | 2017-06-20 |
| CN106872276B true CN106872276B (en) | 2023-08-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710259816.XA Active CN106872276B (en) | 2017-04-20 | 2017-04-20 | Tensile shear test tool for reinforcing steel bar spot welding joint |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112098232B (en) * | 2018-03-20 | 2022-10-04 | 国网山东省电力公司济宁供电公司 | Method for measuring ultimate tensile length of test piece |
| CN108844672B (en) * | 2018-04-26 | 2021-03-02 | 广船国际有限公司 | Ship lashing wire eye plate tension test method |
| CN115266399B (en) * | 2022-08-09 | 2023-07-04 | 中国重汽集团济宁商用车有限公司 | Welding spot torsion test device |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07112280A (en) * | 1993-10-18 | 1995-05-02 | Kajima Corp | Reinforcement coupling robot welding equipment |
| CN2669173Y (en) * | 2003-12-10 | 2005-01-05 | 同济大学 | Concrete-bar welding-net soldered-dot shearing-test clamp |
| JP3130550U (en) * | 2007-01-18 | 2007-03-29 | 株式会社島津製作所 | Weld spot shear test jig and weld spot shear test equipment |
| CN203337450U (en) * | 2013-06-14 | 2013-12-11 | 陕西钢铁集团有限公司 | Fixture for steel bar detection test |
| KR20150040597A (en) * | 2013-10-07 | 2015-04-15 | 임종민 | Safety hook |
| CN204843930U (en) * | 2015-07-31 | 2015-12-09 | 江阴市产品质量监督检验所 | Simple and easy welded steel fabric resistance to shear anchor clamps |
| CN205120486U (en) * | 2015-11-07 | 2016-03-30 | 山西省机电设计研究院 | Experimental frock of welded steel fabric solder joint resistance to shear |
| CN205786130U (en) * | 2016-07-06 | 2016-12-07 | 长春工业大学 | A kind of Forming Limit of Sheet Metals figure test device of improvement |
| CN206756588U (en) * | 2017-04-20 | 2017-12-15 | 福建省建筑工程质量检测中心有限公司 | A kind of reinforcing bar tack-weld tensile shear(ing) test frock |
-
2017
- 2017-04-20 CN CN201710259816.XA patent/CN106872276B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07112280A (en) * | 1993-10-18 | 1995-05-02 | Kajima Corp | Reinforcement coupling robot welding equipment |
| CN2669173Y (en) * | 2003-12-10 | 2005-01-05 | 同济大学 | Concrete-bar welding-net soldered-dot shearing-test clamp |
| JP3130550U (en) * | 2007-01-18 | 2007-03-29 | 株式会社島津製作所 | Weld spot shear test jig and weld spot shear test equipment |
| CN203337450U (en) * | 2013-06-14 | 2013-12-11 | 陕西钢铁集团有限公司 | Fixture for steel bar detection test |
| KR20150040597A (en) * | 2013-10-07 | 2015-04-15 | 임종민 | Safety hook |
| CN204843930U (en) * | 2015-07-31 | 2015-12-09 | 江阴市产品质量监督检验所 | Simple and easy welded steel fabric resistance to shear anchor clamps |
| CN205120486U (en) * | 2015-11-07 | 2016-03-30 | 山西省机电设计研究院 | Experimental frock of welded steel fabric solder joint resistance to shear |
| CN205786130U (en) * | 2016-07-06 | 2016-12-07 | 长春工业大学 | A kind of Forming Limit of Sheet Metals figure test device of improvement |
| CN206756588U (en) * | 2017-04-20 | 2017-12-15 | 福建省建筑工程质量检测中心有限公司 | A kind of reinforcing bar tack-weld tensile shear(ing) test frock |
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| CN106872276A (en) | 2017-06-20 |
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