CN102706738B - Clamp for mechanical property test of welding of steel-bar truss - Google Patents
Clamp for mechanical property test of welding of steel-bar truss Download PDFInfo
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- CN102706738B CN102706738B CN201210195809.5A CN201210195809A CN102706738B CN 102706738 B CN102706738 B CN 102706738B CN 201210195809 A CN201210195809 A CN 201210195809A CN 102706738 B CN102706738 B CN 102706738B
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Abstract
The invention discloses a clamp for the mechanical property test of welding of a steel-bar truss, belongs to the device for fixing a test member, and particularly relates to a clamp for the shear resistance test of welding points of the steel-bar truss. The clamp is characterized by comprising a main hook, a positioning shaft, a sliding block, an adjusting bolt and a base which are connected, wherein the front end of the main hook is provided with a hook head which is provided with a sample opening groove, and the rear end of the main hook is provided with a positioning shaft sleeve; the positioning shaft connected with the sliding block is arranged in the positioning shaft sleeve in a sliding manner; the sliding block is arranged in a rectangular sliding groove arranged on the base in a sliding manner, and is connected with the adjusting bolt arranged on the side wall of the rectangular sliding groove; and a fixed plate is arranged under the base and is connected with a drawing machine. By utilizing the clamp disclosed by the invention, the test is carried out according to the steps of manufacturing a sample, installing the clamp, clamping the sample, adjusting the main hook, drawing and evaluating yield. The clamp disclosed by the invention has the advantages that the concept is novel, the structure is simple, the use is convenient and reliable, multiple purposes are achieved by one clamp and the application to the mechanical property test of multi-specification trusses can be achieved; and since the sample is manufactured at normal temperature, the operation is simple and convenient, the consumed time is less, the measured data is real, accurate and reliable, the efficiency is high and no energy consumption is caused.
Description
Technical field
The invention belongs to the device of fixation test member, relate in particular to steel bar truss welding point shearing resistance fixture for testing.
Background technology
Steel bar girder Product jointing quality directly affects the usability of truss, and shearing resistance that must butt welding contact after truss welding detects, and can come into operation after qualified.After truss welding, the certain angle having between abdomen muscle and string muscle, and along with the variation of truss depth, its angle is also different, and this just brings difficulty to the mechanical test of truss welding point.Current in detecting pad shearing resistance process, first on the string muscle of detected pad, be welded with a test reinforcing bar that becomes 180 degree with abdomen muscle; During detection, the termination of reinforcing bar sample is clipped in testing machine one end, and the test steel bar end being connected with string muscle is clipped in the other end of testing machine; Drawn, makes surveyed pad sealing-off, thereby records the shearing resistance data of pad.The defect existing is: at string muscle, be welded with test reinforcing bar, secondary welding produces a very large impact the shear behavior of surveyed pad, can not accurately reflect the shearing resistance of surveyed pad, causes measurement data inaccurate; Each detection all will be welded with test reinforcing bar, and the shearing resistance that must guarantee to be welded with the solder joint of testing reinforcing bar is greater than the shearing resistance of surveyed pad; Need welding gear, consume the energy, the running time is long, and testing efficiency is low.Therefore, thirst for having a kind of can be for measuring the test fixture of the steel bar truss welding point shearing resistance of differing heights.
Summary of the invention
The defect existing in order to overcome prior art, the object of this invention is to provide a kind of steel bar truss welding mechanical property test fixture, and what during test, guarantee abdomen muscle chord muscle is subject to force direction on same straight line, and test figure is true, accurate, reliable; Non-energy-consumption, fast detecting, improves detection efficiency.
Steel bar truss welding mechanical property test fixture, feature is that this fixture is connected and composed by main hook, locating shaft and slide block, adjusting bolt and base, described main hook is approximate obtuse triangle, gib head is established in front, elongated boss, strip projected parts is established in boss outer, and sample open slot is established in gib head stage casing, steel bar girder string muscle is placed in gib head below, and abdomen muscle is placed in sample open slot; Main Hook establishes positioning shaft sleeve in rear end, and the locating shaft cunning connecting with slide block is contained in positioning shaft sleeve, and locating shaft is located and rotation for main hook provides, and main hook slides and rotates around locating shaft; Slide block cunning is contained in the rectangle chute that base establishes, be connected with the adjusting bolt being located on rectangle chute wall, rotate adjusting bolt, slide block moves left and right along rectangle chute, locating shaft and main hook also move thereupon, by slide block, moved with main hook and rotated around locating shaft, what during test, guarantee abdomen muscle chord muscle is subject to force direction on same straight line, guarantees that test specimen can carry out stretched vertically; Base is divided into fixed head and is connected with cupping machine.During detection, cupping machine one end clamping abdomen muscle, the other end is clamped the fixed head of base, and drawn makes surveyed solder joint sealing-off, records the shearing resistance data of pad.
The present invention further improves, and rectangle chute is established on described base top, and slide block cunning is decorateeed in chute; Chute wall is established adjusting bolt hole and is coordinated with adjusting bolt, is with handled adjusting bolt to be placed in adjusting bolt hole; Screw is established in the fixed head bottom that base is established, and plate washer is bolted on fixed head, and it is firm to make to be connected with cupping machine.
The present invention further improves, described main hook is approximate obtuse triangle, gib head is established in front, elongated boss, strip projected parts is established in boss outer, sample open slot is established in gib head stage casing, its angle α=35 ~ 73 °, and the steel bar girder sample that is suitable for angle between abdomen muscle and string muscle and is 35 ~ 73 ° carries out tension test; Cylindrical positioning shaft sleeve is established in main hook rear end, and locating shaft fills in the inner.
The present invention further improves, and described slide block is rectangular parallelepiped, and reverse "T"-shaped groove is established in upper end, and screw is established in slide block outside, and bolt is fixed on slide block through the slide block baffle plate that is wider than chute width, and anti-limited slip block comes off; Step and locating shaft are established in slide block inner side, and step width is greater than chute width, has both hindered a grade slide block and has come off, and again main hook and base is separated; Locating shaft is located on slide block step, and the positioning shaft sleeve internal diameter that diameter is established with main hook matches, and locating shaft cunning is contained in positioning shaft sleeve, by locating shaft plate washer and bolt, is fixed, and main hook rotates around locating shaft; Slide block is constrained in rectangle chute by slide block plate washer and step, horizontally slips.
Last improvement of the present invention, the adjusting bolt hole that described adjusting bolt is established with base coordinates, and front end is established "T"-shaped connector, the reverse "T"-shaped groove fit of establishing with slide block, links together; Handle is established in rear end, rotates adjusting bolt, and band movable slider moves.
Apply fixture of the present invention, while carrying out steel bar truss welding mechanical property test, carry out according to the following steps:
1, under sample production normal temperature, adopt mechanical sampling, in intercepting steel bar girder, band is surveyed string muscle and the abdomen muscle of pad to some extent;
2, the fixed head of sectional fixture base plate is fixed on one end of cupping machine;
3, the string muscle that clamps sample truss is placed in edge under gib head, by strip projected parts, is blocked, and abdomen muscle is placed in sample open slot, and abdomen muscle is fixed on the cupping machine other end;
4, adjust main hook and rotate adjusting bolt, band movable slider, locating shaft and main hook move to left or move to right, and main hook is done self-adaptation rotation, and the force direction that is subject to of abdomen muscle and string muscle is coexisted on straight line, guarantees sample stretched vertically;
5, stretch and start cupping machine tension test, until abdomen muscle and string muscle sealing-off; Record Mechanical Data;
6, product quality judge disposal data contrasts and passes judgment on required standard.
Compared with prior art, advantage is: novel, simple in structure, easy to use, reliable, a tool is multiplex, can be used for plurality of specifications truss mechanical test; Adopt normal temperature to make sample, easy and simple to handle, consuming time few, truly, accurately and reliably, efficiency is high for measurement data, goes back energy free consumption.
Accompanying drawing explanation
The invention will be further described to contrast accompanying drawing below.
Fig. 1 is steel bar truss welding mechanical property test clamp structure schematic diagram.
Fig. 2 is the side view of Fig. 1.
Fig. 3 is Fig. 1 view afterwards.
Embodiment
By Fig. 1, Fig. 2 and Fig. 3, can find out that steel bar truss welding mechanical property test is connected and composed by main hook 1, locating shaft 2 and slide block 3, adjusting bolt 4 and base 5 with fixture, main hook front end is established rectangular shape gib head 6, gib head is established sample open slot 7, cylindrical positioning shaft sleeve 8 is established in rear end, locating shaft is connected with slide block, and locating shaft cunning is contained in positioning shaft sleeve.Slide block cunning is contained in the rectangle chute 9 that base establishes, and is connected with the adjusting bolt being located on rectangle chute wall.Base is divided into fixed head 10, is connected with cupping machine (not marking in figure).
By Fig. 1, Fig. 2, be it can also be seen that, closed rectangle chute is established on base top, and slide block cunning is loaded in chute, and rectangle chute right side wall is established adjusting bolt hole (not marking in figure); Base is divided into fixed head, and screw (not marking in figure) is established in fixed head lower end, and plate washer 11 is bolted on fixed head.
By Fig. 1, Fig. 2 and Fig. 3, be it can also be seen that, main hook is approximate obtuse triangle, and gib head is established in front, and elongated, strip projected parts (not marking in figure) is established in boss outer, and dihedral sample open slot is established in gib head stage casing, angle α=35 ~ 73 °, both sides of groove.Cylindrical positioning shaft sleeve 8 is established in main hook rear end, and locating shaft is loaded on wherein.
By Fig. 1 Fig. 2 and Fig. 3, be it can also be seen that, slide block 3 is rectangular parallelepiped, and reverse "T"-shaped groove is established in upper end, and screw (not marking in figure) is established in slide block outside, is wider than the chute baffle plate 12 of chute width, is bolted on slide block, and anti-limited slip block comes off.Step 13 and locating shaft are established in slide block inner side, and step width is greater than chute width, and resistance shelves slide block comes off, and again main hook and base is separated.Locating shaft is located on the step of slide block, and diameter matches with the positioning shaft sleeve internal diameter of establishing on main hook, and locating shaft cunning is contained in positioning shaft sleeve.Screw is established in locating shaft outer end, and locating shaft plate washer 14 is bolted on the axle head of location, stops locating shaft to come off.Slide block is constrained in rectangle chute by slide block baffle plate and step.
By Fig. 1 and Fig. 3, can be found out, the adjusting bolt hole that adjusting bolt is established with base coordinates, and adjusting bolt front end is established "T"-shaped connector, the reverse "T"-shaped groove fit of establishing with slide block, links together; Grip hole is established in adjusting bolt rear end, and handle 15 packs in grip hole (not marking in figure).
Truss welding mechanical property test
With muscle diameter 10 mm that wind up, abdomen muscle diameter 6mm, lower edge muscle diameter 8mm, the steel bar girder CRB550 that shearing resistance value is 8490N is example, carries out mechanical property test.
(1) steel bar girder that sample production height is 190mm, abdomen muscle and muscle angle 62 degree that wind up intercept a band solder joint sample by shearing resistance sample sampling rule on winding up, and abdomen muscle length is no less than 100 mm, and the muscle that winds up is blocking apart from solder joint 150mm place.
(2) sectional fixture clamp bottom board is fixed on cupping machine one end.
(3) clamp sample string muscle and be placed in edge under gib head, abdomen muscle is placed in sample open slot, and abdomen muscle is fixed on the cupping machine other end.
(4) adjust main hook and rotate adjusting bolt, locating shaft rotation center 19 mm that move right, limit, oblique angle, fixture inclination angle is 62 degree, guarantees that abdomen muscle is subject to force direction and fixture to be subject to force direction on same straight line.
(5) stretch and start cupping machine tension test, until abdomen muscle and string muscle sealing-off; Test specimen related data is listed in table 1, and the data of test are listed in table 2.
Comparative example by the various embodiments described above intercepting test specimen, is welded with test reinforcing bar on string muscle, by prior art, carries out tension test, records Mechanical Data and lists in table 2.
Table 1 test specimen parameter and fixture moving state table
Table 2 this method embodiment and comparative example test mechanics tables of data
| Embodiment/comparative example | 1 | 2 | 3 | 4 | 5 |
| Embodiment | 8930N | 10360N | 9752N | 9120N | 9370N |
| Comparative example | 7420N | 8340N | 9310N | 6840N | 8073N |
As can be seen from the above table: sampling under the same conditions, and application prior art data measured is very unstable, and also it is far away to depart from actual value, causes erroneous judgement.Apply data stabilization that fixture of the present invention and test method record, accurately, reliable, can truly reflect the shearing resistance performance of steel bar truss welding point.
Claims (5)
1. steel bar truss welding mechanical property test fixture, it is characterized in that this fixture is connected and composed by main hook (1), locating shaft (2) and slide block (3), adjusting bolt (4) and base (5), described main hook is approximate obtuse triangle, gib head (6) is established in front, elongated boss, strip projected parts is established in boss outer, and sample open slot (7) is established in gib head stage casing, steel bar girder string muscle is placed in gib head below, and abdomen muscle is placed in sample open slot; Positioning shaft sleeve (8) is established in main hook rear end, and the locating shaft cunning connecting with slide block is contained in positioning shaft sleeve, and main hook slides and rotates around locating shaft; Slide block cunning is contained in the rectangle chute (9) that base establishes, be connected with the adjusting bolt being located on rectangle chute wall, by slide block, moved with main hook and rotated around locating shaft, what guarantee abdomen muscle chord muscle is subject to force direction on same straight line, guarantees that test specimen can carry out stretched vertically; Base is divided into fixed head (10) and is connected with cupping machine.
2. steel bar truss welding mechanical property test fixture according to claim 1, is characterized in that described base top establishes rectangle chute (9), and slide block cunning is loaded in chute; Chute wall is established adjusting bolt hole and is coordinated with adjusting bolt, is with handled adjusting bolt to be placed in adjusting bolt hole; Screw is established in the fixed head bottom that base is established, and plate washer (11) is bolted on fixed head.
3. steel bar truss welding mechanical property test fixture according to claim 1, is characterized in that described its angle α=35 ~ 73 ° of sample open slot, and the steel bar girder sample that is suitable for angle between abdomen muscle and string muscle and is 35 ~ 73 ° carries out tension test.
4. steel bar truss welding mechanical property test fixture according to claim 1, it is characterized in that described slide block is rectangular parallelepiped, reverse "T"-shaped groove is established in upper end, screw is established in slide block outside, bolt is fixed on slide block through the slide block baffle plate (12) that is wider than chute width, and anti-limited slip block comes off; Step (13) and locating shaft are established in slide block inner side, and step width is greater than chute width, has both hindered a grade slide block and has come off, and again main hook and base is separated; Locating shaft is located on slide block step, and the positioning shaft sleeve internal diameter that diameter is established with main hook matches, and locating shaft cunning is contained in positioning shaft sleeve, by locating shaft plate washer and bolt, is fixed, and main hook rotates around locating shaft; Slide block is constrained in rectangle chute by slide block plate washer (14) and step, horizontally slips.
5. steel bar truss welding mechanical property test fixture according to claim 4, it is characterized in that the adjusting bolt hole that described adjusting bolt is established with base coordinates, front end is established "T"-shaped connector, the reverse "T"-shaped groove fit of establishing with slide block, links together; Handle (15) is established in rear end, rotates adjusting bolt, and band movable slider moves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210195809.5A CN102706738B (en) | 2012-06-14 | 2012-06-14 | Clamp for mechanical property test of welding of steel-bar truss |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210195809.5A CN102706738B (en) | 2012-06-14 | 2012-06-14 | Clamp for mechanical property test of welding of steel-bar truss |
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| Publication Number | Publication Date |
|---|---|
| CN102706738A CN102706738A (en) | 2012-10-03 |
| CN102706738B true CN102706738B (en) | 2014-04-02 |
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| CN201210195809.5A Active CN102706738B (en) | 2012-06-14 | 2012-06-14 | Clamp for mechanical property test of welding of steel-bar truss |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105203453B (en) * | 2015-09-21 | 2018-04-24 | 江苏科技大学 | Micro- the punching test device and method of a kind of welding point Micro Zone Mechanical Properties |
| ES2650620B2 (en) * | 2016-07-19 | 2018-07-31 | Universidade De Vigo | Equipment and method for testing articulated reticular structures |
| CN112730045A (en) * | 2020-12-21 | 2021-04-30 | 中南大学 | Shearing clamp and application method thereof |
| CN114518286B (en) * | 2022-01-11 | 2023-09-22 | 中国人民解放军国防科技大学 | Tensile member mounting fixture for mechanical tensile test |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4380174A (en) * | 1980-08-15 | 1983-04-19 | Tanenbaum Joseph M | Apparatus for shear testing welds |
| CN201177587Y (en) * | 2007-12-28 | 2009-01-07 | 浙江昆仑建设集团股份有限公司 | Jigs for checking reinforcing steel bar-steel plate welding strength |
| CN202008445U (en) * | 2011-03-11 | 2011-10-12 | 北京邢钢焊网科技发展有限责任公司 | Clamp for testing nodes of net welded by steel reinforcing ribs |
| CN202661331U (en) * | 2012-06-14 | 2013-01-09 | 安徽马钢比亚西钢筋焊网有限公司 | Clamp for testing welding mechanical properties of reinforcing steel bar truss |
-
2012
- 2012-06-14 CN CN201210195809.5A patent/CN102706738B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4380174A (en) * | 1980-08-15 | 1983-04-19 | Tanenbaum Joseph M | Apparatus for shear testing welds |
| CN201177587Y (en) * | 2007-12-28 | 2009-01-07 | 浙江昆仑建设集团股份有限公司 | Jigs for checking reinforcing steel bar-steel plate welding strength |
| CN202008445U (en) * | 2011-03-11 | 2011-10-12 | 北京邢钢焊网科技发展有限责任公司 | Clamp for testing nodes of net welded by steel reinforcing ribs |
| CN202661331U (en) * | 2012-06-14 | 2013-01-09 | 安徽马钢比亚西钢筋焊网有限公司 | Clamp for testing welding mechanical properties of reinforcing steel bar truss |
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| CN102706738A (en) | 2012-10-03 |
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