CN202720163U - Tension and relaxation testing machine - Google Patents
Tension and relaxation testing machine Download PDFInfo
- Publication number
- CN202720163U CN202720163U CN 201220300279 CN201220300279U CN202720163U CN 202720163 U CN202720163 U CN 202720163U CN 201220300279 CN201220300279 CN 201220300279 CN 201220300279 U CN201220300279 U CN 201220300279U CN 202720163 U CN202720163 U CN 202720163U
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- China
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- screw mandrel
- testing machine
- screw
- sleeve
- middle baffle
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The utility model discloses a tension and relaxation testing machine. The machine comprises a rack and a testing frame arranged on the surface of a working table of the rack, the testing frame comprises a side baffle, a middle baffle and a plurality of supporting rods connected between the side baffle and the middle baffle, a tension sensor and a fixing clamp are arranged outside the side baffle in sequence, the tension sensor is in signal connection with a control center; a power part is arranged outside the middle baffle, wherein the power part comprises a driving machine and a screw in transmission connection with the driving machine, a perforative centre hole is formed in the screw which passes through the middle baffle, a sleeve is connected with the outer face of the screw through threads, a fixing clamp is arranged on the head part of the sleeve, and the tension and relaxation testing machine is characterized in that the screw is a ball screw. By adoption of the tension and relaxation testing machine, a conventional trapezoidal thread screw is replaced by the ball screw with smaller fit clearance, so that test results are accurate.
Description
Technical field
The utility model relates to a kind of steel strand wires performance aircraft, relates to specifically the stretching relaxation testing machine that a kind of pulling force to steel strand wires, stress index carry out relaxation test.
Background technology
At bridge, in the foundation construction processes such as highway, particularly in the prestressed concrete construction, a large amount of steel strand wires of using, because pulling force and the stress of steel strand wires have conclusive effect for construction quality, for this reason, usually constructing front and in work progress, need the steel strand wires that adopt are carried out tensile strength, stretching force, maximum, force, tensile property parameter and the stress relaxation forces such as percentage of total elongation, relaxation stress, relaxation force equal stress relaxation property parameter, existing stretching relaxation testing machine can be measured these performances, existing stretching relaxation testing machine mainly comprises a support, support being provided with by two baffle plates and being connected to the test stand that some bracing frames between two baffle plates form at work top, on a baffle plate pulling force sensor is set therein, a drawing mechanism is set in the back of another piece baffle plate, its drawing mechanism is in transmission connection by reduction gear and a rhizoid bar by propulsion system usually, be connected with a sleeve in the outside of screw mandrel, during concrete test, be separately fixed at two ends of steel strand wires between two baffle plates and pass screw mandrel, screw mandrel is done axial movement with moving sleeve when rotating, steel strand wires are strained, when steel strand wires are tightened to certain force, stop the rotation of screw mandrel, keep a period of time, by reading the tightening force of steel strand wires in the control center, retention time, thereby STRESS VARIATION draws the various performance parameters of steel strand wires.But the screw mandrel that adopts in the existing stretching relaxation testing machine is common trapezoidal threaded screw rod, and it has larger gap during with the cooperating of sleeve, and makes the larger error of test findings and physical presence, can not embody the actual performance of tested steel strand wires fully.
The utility model content
For overcoming defects, the utility model aims to provide a kind of stretching relaxation testing machine of actual performance of energy Accurate Determining steel strand wires.
For achieving the above object, the technical solution adopted in the utility model is: a kind of stretching relaxation testing machine, comprise a frame, work top in frame is provided with a test stand, described test stand comprise a side guard, a middle baffle plate and be connected to side guard and middle baffle plate between some support bars, the outside of described side guard is provided with a pulling force sensor and a geometrical clamp successively, and described pulling force sensor is connected with the control center signal; The outside of described middle baffle plate is provided with a power part, described power part comprises a driving machine and the screw mandrel that is in transmission connection with driving machine, described screw mandrel has the center pit that runs through, described screw mandrel passes middle baffle plate, a sleeve has been threaded on the outside surface of described screw mandrel, the head of described sleeve is provided with a geometrical clamp, it is characterized in that described screw mandrel is ball screw.
Described power part is provided with two limit sensors, and described limit sensors is connected with the control center signal respectively.
The outside surface of described sleeve slidably is connected with a guide cylinder.
Adopted stretching relaxation testing machine of the present utility model, because traditional acme thread screw mandrel is replaced to the less ball screw of tolerance clearance, made the result of test more accurate.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Among the figure: 1-frame, 2-test stand, 3-power part, 4-limit sensors, 5-control center, 6-steel strand wires, the 11-side guard, 12-support bar, baffle plate among the 13-, 14-pulling force sensor, 15-geometrical clamp, 21-driving machine, the 22-screw mandrel, 23-center pit, 24-sleeve, 25-guide cylinder, 26-gathering sill.
Embodiment
As shown in Figure 1, the utility model discloses a kind of stretching relaxation testing machine, comprise a frame 1, work top in frame 1 is provided with a test stand 2, described test stand 2 comprise a side guard 11, a middle baffle plate 13 and be connected to side guard 11 and middle baffle plate 13 between some support bars 12, the outside of described side guard 11 is provided with a pulling force sensor 14 and a geometrical clamp 15 successively, and described pulling force sensor 14 is connected with control center 5 signals; The outside of described middle baffle plate 13 is provided with a power part 3, described power part 3 comprises a driving machine 21 and the screw mandrel 22 that is in transmission connection with driving machine, described screw mandrel 22 has the center pit 23 that runs through, described screw mandrel 22 passes middle baffle plate 13, a sleeve 24 has been threaded on the outside surface of described screw mandrel 22, the head of described sleeve 24 is provided with a geometrical clamp 15, and the center of the center pit 23 of described pulling force sensor 14, screw mandrel 22, sleeve 24 and two geometrical clamps 15 is on the same axis.
The innovative point of stretching relaxation testing machine of the present utility model is that mainly described screw mandrel 22 is ball screw.During concrete test, first a stature of steel strand wires 6 pass successively pulling force sensor 14 and it geometrical clamp 15 at one end, and with geometrical clamp 15 this head clamping of steel strand wires 6, again the other end of steel strand wires 6 is passed the center pit 23 of screw mandrel 22 and the geometrical clamp 15 of screw mandrel 22 place ends successively, and with geometrical clamp 15 this head clamping of steel strand wires 6; Then open driving machine 21, drive screw mandrel 22 rotations and make the sleeve 24 that is connected on screw mandrel 22 outside surfaces do axial movement, steel strand wires 6 tensions, in tension steel strand wires 6, pulling force sensor 14 is transferred to control center 5 to the pulling force size that steel strand wires 6 are subject to, when the pulling force that is subject to when steel strand wires 6 reaches ratings, control center's 5 control driving machines 21 stop operating, make steel strand wires 6 keep this specified pulling force regular hour, final steel strand wires 6 tightening force during this period of time that from control center 5, reads, retention time, the indexs such as STRESS VARIATION are judged the various performance parameters of tested steel strand wires 6 with this.
In order to prevent that sleeve 24 from coming off from screw mandrel 22 because movement goes beyond the limit of the position, another innovative point of stretching relaxation testing machine of the present utility model is that described power part 3 is provided with two limit sensors 4, and described limit sensors 4 is connected with control center 5 signals respectively.By in advance in control center 5 two limit moving limit positions to sleeve 24 set, when screw mandrel 22 moved to the extreme position on two limits with moving sleeve 24, control center 5 can stop operating by control driving machines 21.
Off-axis not when sleeve 24 is moved axially under the driving of screw mandrel 22, the outside surface of described sleeve 24 slidably is connected with a guide cylinder 25.Described guide cylinder 25 can be fixed on the side of power part 3, and at guide cylinder 25 inwalls gathering sill 26 is set.
Claims (3)
1. stretching relaxation testing machine, comprise a frame (1), work top in frame (1) is provided with a test stand (2), described test stand (2) comprise a side guard (11), a middle baffle plate (13) and be connected to side guard (11) and middle baffle plate (13) between some support bars (12), the outside of described side guard (11) is provided with a pulling force sensor (14) and a geometrical clamp (15) successively, and described pulling force sensor (14) is connected with control center (5) signal; The outside of described middle baffle plate (13) is provided with a power part (3), the screw mandrel (22) that described power part (3) comprises a driving machine (21) and is in transmission connection with driving machine, described screw mandrel (22) has the center pit (23) that runs through, described screw mandrel (22) passes middle baffle plate (13), a sleeve (24) has been threaded on the outside surface of described screw mandrel (22), the head of described sleeve (24) is provided with a geometrical clamp (15), it is characterized in that described screw mandrel (22) is ball screw.
2. stretching relaxation testing machine according to claim 1 is characterized in that described power part (3) is provided with two limit sensors (4), and described limit sensors (4) is connected with control center (5) signal respectively.
3. stretching relaxation testing machine according to claim 1 is characterized in that the outside surface of described sleeve (24) slidably is connected with a guide cylinder (25).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220300279 CN202720163U (en) | 2012-06-26 | 2012-06-26 | Tension and relaxation testing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220300279 CN202720163U (en) | 2012-06-26 | 2012-06-26 | Tension and relaxation testing machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202720163U true CN202720163U (en) | 2013-02-06 |
Family
ID=47621985
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220300279 Expired - Fee Related CN202720163U (en) | 2012-06-26 | 2012-06-26 | Tension and relaxation testing machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202720163U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103308291A (en) * | 2013-05-16 | 2013-09-18 | 国家电网公司 | Pin loosening proof preventive inspection device for double-hook tightener |
| CN105699190A (en) * | 2016-04-13 | 2016-06-22 | 桂林理工大学 | Test device for testing stress relaxation of FRP (fiber reinforced plastic) cloth |
| CN105716949A (en) * | 2016-04-13 | 2016-06-29 | 桂林理工大学 | Method for testing stress relaxation of FRP (fiber reinforced plastic) fabric |
-
2012
- 2012-06-26 CN CN 201220300279 patent/CN202720163U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103308291A (en) * | 2013-05-16 | 2013-09-18 | 国家电网公司 | Pin loosening proof preventive inspection device for double-hook tightener |
| CN103308291B (en) * | 2013-05-16 | 2015-09-02 | 国家电网公司 | Double-hook wire grip locking pin preventive inspection device |
| CN105699190A (en) * | 2016-04-13 | 2016-06-22 | 桂林理工大学 | Test device for testing stress relaxation of FRP (fiber reinforced plastic) cloth |
| CN105716949A (en) * | 2016-04-13 | 2016-06-29 | 桂林理工大学 | Method for testing stress relaxation of FRP (fiber reinforced plastic) fabric |
| CN105716949B (en) * | 2016-04-13 | 2018-07-03 | 桂林理工大学 | A kind of test method for testing FRP cloth stress relaxation |
| CN105699190B (en) * | 2016-04-13 | 2018-07-03 | 桂林理工大学 | A kind of experimental rig for testing FRP cloth stress relaxation |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130206 Termination date: 20150626 |
|
| EXPY | Termination of patent right or utility model |