CN211697250U

CN211697250U - Tension-torsion displacement monitoring device

Info

Publication number: CN211697250U
Application number: CN202020311318.2U
Authority: CN
Inventors: 王剑; 邹昆仑
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-03-13
Filing date: 2020-03-13
Publication date: 2020-10-16
Anticipated expiration: 2030-03-13

Abstract

The utility model relates to a draw and turn round displacement monitoring devices, including be used for with the test piece upper end rotate the upper bracket be connected and be used for with the lower mount of tip fixed connection under the test piece, the top of lower mount is connected with a plurality of vertical connecting rods, upper bracket and connecting rod sliding fit in vertical direction. The device is characterized by further comprising a torsion angle monitoring device arranged at the upper end of the test piece and a displacement monitoring device arranged on each connecting rod, wherein the displacement monitoring device is used for detecting the extension displacement between the upper fixing frame and the lower fixing frame, and the torsion angle monitoring device is used for detecting the torsion angle of the test piece relative to the upper fixing frame. The utility model discloses directly measure the tensile of test piece with twist reverse, avoided because of anchor clamps and draw and turn round the data error that drive transmission device arouses drawing the deformation of turning round the in-process, measure accurately.

Description

Tension-torsion displacement monitoring device

Technical Field

The utility model relates to a draw and turn round displacement monitoring devices.

Background

At present, when a tension-torsion test is carried out on a test piece, the tensile displacement and the tension-torsion displacement of the test piece need to be detected, the current monitoring device usually directly detects the rotating speed of a torsion driving motor and the tensile displacement between an upper clamp and a lower clamp, but because the clamps and the tension-torsion driving transmission device are deformed in the tension-torsion process, the measured tensile displacement and the measured torsion displacement are larger than the actual tension-torsion displacement of the test piece, the measured data are inaccurate, and the specific tensile displacement and the torsion displacement of the test piece in the test cannot be accurately detected.

SUMMERY OF THE UTILITY MODEL

The utility model provides a draw and turn round displacement detection device can accurate monitoring draw and turn round tensile, the torsion displacement of test piece in the experiment.

In order to solve the technical problem, the utility model adopts the following technical scheme:

the utility model provides a draw and turn round displacement monitoring devices which characterized in that: the device comprises an upper fixing frame and a lower fixing frame, wherein the upper fixing frame is rotationally connected with the upper end of a test piece, the lower fixing frame is fixedly connected with the lower end of the test piece, the top of the lower fixing frame is connected with a plurality of vertical connecting rods, and the connecting rods are in sliding fit with the upper fixing frame in the vertical direction;

the device is characterized by further comprising a torsion angle monitoring device arranged at the upper end of the test piece and a displacement monitoring device arranged on each connecting rod, wherein the displacement monitoring device is used for detecting the extension displacement between the upper fixing frame and the lower fixing frame, and the torsion angle monitoring device is used for detecting the torsion angle of the test piece relative to the upper fixing frame.

As a further improvement of the utility model, the upper fixing frame is connected with the rotation of the upper end of the test piece through the bearing.

As a further improvement of the present invention, the displacement monitoring device is an extensometer; the upper pin of the extensometer is connected with the upper fixed frame, and the lower pin of the extensometer is connected with the connecting rod.

As a further improvement, the torsion angle monitoring device is a photoelectric encoder, the casing of the photoelectric encoder is installed on the upper fixing frame, a center hole is arranged in the middle of the rotating part installed on the casing, and the upper end of the test piece is passed through the center hole and is connected with the rotating part.

As a further improvement of the utility model, the centre bore of the rotating part of the photoelectric encoder is connected with the test piece coaxial coupling through the expansion coupling sleeve.

Compared with the prior art, the utility model discloses following beneficial effect has:

1. the utility model directly measures the tension and torsion of the test piece in the tension-torsion test, avoids the data error caused by the deformation of the clamp and the tension-torsion driving transmission device in the tension-torsion process, and has accurate measurement;

2. the utility model discloses in detect the tensile displacement of test piece through the displacement detection device on a plurality of connecting rods, take the average value of a plurality of detected data, avoided the data error that rocks because of connecting rod, lower fixed disk etc. and arouse, improved the accuracy of data measurement;

3. the torsion angle monitoring device is installed at the upper end of the test piece, the torsion displacement of the test piece is directly detected, and the detection data is more accurate.

Drawings

Fig. 1 is a schematic view of the overall structure of the embodiment of the present invention.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings and examples.

As shown in fig. 1, a draw and turn round displacement monitoring devices, including be used for with 1 upper end of test piece rotate be connected the upper bracket 3 and be used for with 1 lower tip fixed connection's of test piece lower mount 5, upper bracket 3 and lower mount 5 are perpendicular with 1 test piece respectively, the top of lower mount 5 is connected with a plurality of vertical connecting rods 4, set up the through-hole with connecting rod 4 one-to-one on the upper bracket 3, through-hole sliding fit on vertical direction on connecting rod 4 and the upper bracket 3.

Specifically, in the present embodiment, the upper fixing frame 3 is rotatably connected to the upper end of the test piece 1 through a bearing 7.

Draw and turn round displacement monitoring devices still including installing displacement monitoring devices on connecting rod 4 and installing the torsion angle monitoring devices in test piece 1 upper end, displacement monitoring devices is used for detecting the extension displacement between upper bracket 3 and lower mount 5, and torsion angle monitoring devices is used for detecting the torsion angle of test piece 1 for upper bracket 3. The displacement monitoring device and the torsion angle monitoring device are respectively connected with a computer and used for recording tensile and torsion displacement data of the test piece 1.

Specifically, in this embodiment, the displacement monitoring device is an extensometer 6, an upper pin of the extensometer 6 is connected with the upper fixing frame 3, a lower pin of the extensometer 6 is connected with the connecting rod 4, and the central lines of the upper pin and the lower pin of the extensometer 6 are parallel to the axis of the test piece 1. And the signal output end of the extensometer 6 is connected with a computer or a display device.

Furthermore, the average value of the data of the displacement monitoring devices on the connecting rods 4 is taken as the tensile displacement of the test piece 1, so that data errors caused by shaking of the connecting rods 4, the lower fixing frame 5 and the like are avoided, and the accuracy of data measurement is improved.

Further, specifically, the torsion angle monitoring device in this embodiment is a photoelectric encoder 2, a housing of the photoelectric encoder 2 is mounted on the upper fixing frame 3, a central hole is formed in the middle of a rotating portion mounted on the housing, and the upper end of the test piece 1 penetrates through the central hole and is connected with the rotating portion.

Specifically, in this embodiment, the rotating portion of the photoelectric encoder 2 may be coaxially connected to the test piece 1 through the expansion coupling sleeve 8, and the signal output end of the photoelectric encoder 2 is connected to a computer or a display device, so as to output the torsion angle of the test piece 1.

When the device is used, the upper fixing frame 3 is installed at the upper end part of the test piece 1 through the bearing 7, the photoelectric encoder 2 is installed on the upper fixing frame 3, the rotating part of the photoelectric encoder is coaxially connected with the test piece 1 through the expansion coupling sleeve 8, the lower fixing frame 5 is fixedly installed at the lower end of the test piece 1, the upper fixing frame 3 is parallel to the lower fixing frame 5, and the upper fixing frame 3 and the lower fixing frame 5 are both vertical to the axis of the test piece 1. The lower end of the connecting rod 4 is fixedly arranged at the top of the lower fixing frame 5, the upper end of the connecting rod passes through a through hole in the upper fixing frame 3 and is positioned above the upper fixing frame 3, and the extension displacement between the upper fixing frame 3 and the lower fixing frame 5 is the tensile displacement of the test piece 1. Then install extensometer 6 between connecting rod 4 and upper mounting bracket 3, connect computer respectively with extensometer 6 and photoelectric encoder 2, test piece 1 draws and turns round the displacement monitoring devices installation back, fix the upper and lower both ends of test piece 1 respectively to drawing and turning round the upper and lower anchor clamps of testing machine, draw and turn round test to test piece 1, draw and turn round in-process extensometer 6 can real-time supervision test piece 1's tensile displacement, photoelectric encoder 2 can real-time supervision test piece 1's torsion angle, and carry out the record through the computer, take the average value of a plurality of extensometers 6 detected data at last to be test piece 1's tensile displacement.

Claims

1. The utility model provides a draw and turn round displacement monitoring devices which characterized in that: the device comprises an upper fixing frame (3) rotationally connected with the upper end of a test piece (1) and a lower fixing frame (5) fixedly connected with the lower end of the test piece (1), wherein the top of the lower fixing frame (5) is connected with a plurality of vertical connecting rods (4), and the connecting rods (4) are in sliding fit with the upper fixing frame (3) in the vertical direction;

the device is characterized by further comprising a torsion angle monitoring device arranged at the upper end of the test piece (1) and a displacement monitoring device arranged on each connecting rod (4), wherein the displacement monitoring device is used for detecting the extension displacement between the upper fixing frame (3) and the lower fixing frame (5), and the torsion angle monitoring device is used for detecting the torsion angle of the test piece (1) relative to the upper fixing frame (3).

2. The tension torsion displacement monitoring device according to claim 1, wherein: the upper fixing frame (3) is rotatably connected with the upper end part of the test piece (1) through a bearing (7).

3. The tension torsion displacement monitoring device according to claim 1, wherein: the displacement monitoring device is an extensometer (6); the upper pin of the extensometer (6) is connected with the upper fixed frame (3), and the lower pin of the extensometer (6) is connected with the connecting rod (4).

4. A tension torsion displacement monitoring device according to any one of claims 1 to 3, wherein: the torsion angle monitoring device is a photoelectric encoder (2), a shell of the photoelectric encoder (2) is installed on the upper fixing frame (3), a central hole is formed in the middle of a rotating part installed on the shell, and the upper end of the test piece (1) penetrates through the central hole and is connected with the rotating part.

5. The tension torsion displacement monitoring device according to claim 4, wherein: the center hole of the rotating part of the photoelectric encoder (2) is coaxially connected with the test piece (1) through an expansion coupling sleeve (8).