CN209784087U - Torsion testing device in sheet material plane - Google Patents
Torsion testing device in sheet material plane Download PDFInfo
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- CN209784087U CN209784087U CN201822270570.9U CN201822270570U CN209784087U CN 209784087 U CN209784087 U CN 209784087U CN 201822270570 U CN201822270570 U CN 201822270570U CN 209784087 U CN209784087 U CN 209784087U
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Abstract
The utility model belongs to the technical field of the testing arrangement technique and specifically relates to indicate a test device twists reverse in panel plane, including controlling means, base, outside clamping mechanism, slewing mechanism, inside clamping mechanism, moment of torsion accredited testing organization and camera, the base is provided with the portal frame, the camera set up in the portal frame, outside clamping mechanism set up in the base is located in the portal frame, inside clamping mechanism set up in the base with between the portal frame, moment of torsion accredited testing organization with slewing mechanism all set up in the base, moment of torsion accredited testing organization set up in slewing mechanism with between the outside clamping mechanism, slewing mechanism moment of torsion accredited testing organization with the camera all with the controlling means electricity is connected.
Description
Technical Field
The utility model belongs to the technical field of testing arrangement technique and specifically relates to indicate a torsion testing arrangement in sheet material plane.
background
In modern industry, in order to reduce the waste of raw materials, many material performance tests are performed by numerical simulation analysis, i.e. various properties of the material are simulated by software, and then various tests (such as a rebound test and a fracture test) are applied to the simulated material by the software, and the tested state of the material is reflected by the software according to the tests.
However, in the current numerical simulation analysis, the simulation result of the springback test is unsatisfactory, that is, the simulation result of the springback test is greatly different from the actual result, so that the test of the type needs to be combined with the actual test result to collect data, and the result with smaller error can be simulated.
the rebound test is usually performed by a pull-press test, a cyclic shear test and a cyclic bending test, but the tests have various defects, and the following are more prominent: when performing spring back tests, it is difficult to determine the stress state and stress image of a material. The above-mentioned problem has a great influence on the result collected by the numerical simulation analysis, so that the numerical simulation analysis cannot accurately simulate the test result.
Disclosure of Invention
The utility model discloses the problem to prior art provides a twist reverse testing arrangement in the sheet material plane, can accurately obtain the shear stress and the strain image of sheet material to provide accurate parameter reference for numerical simulation analysis.
In order to solve the technical problem, the utility model discloses a following technical scheme:
the utility model provides a sheet material plane internal torsion testing device, which comprises a control device, a base, an external clamping mechanism for clamping the outer side of the top and the outer side of the bottom of a sheet material to be tested, a rotating mechanism for driving the external clamping mechanism to rotate, an internal clamping mechanism for clamping the center of the top and the center of the bottom of the sheet material to be tested, a torque testing mechanism for measuring the torque received by the external clamping mechanism, and a camera for shooting strain images of the sheet material to be tested, wherein the base is provided with a portal frame, the camera is arranged on the portal frame, the external clamping mechanism is arranged on the base and positioned in the portal frame, the internal clamping mechanism is arranged between the base and the portal frame, the torque testing mechanism and the rotating mechanism are both arranged on the base, the torque testing mechanism is arranged between the rotating mechanism and the external clamping mechanism, and the rotating mechanism, the torque testing mechanism and the camera are all electrically connected with the control device.
Further, the external clamping mechanism comprises a clamping seat and a clamping flange, the rotating mechanism is in transmission connection with the clamping seat, the clamping flange is provided with a first protruding part, the clamping seat is provided with a second protruding part, the first protruding part and the second protruding part are arranged oppositely, and the first protruding part and the second protruding part are matched to clamp a plate to be tested; the clamping seat is connected with the clamping flange through screws.
Further, the internal clamping mechanism comprises a first clamping piece and a second clamping piece, the base is provided with a fixing column, the fixing column penetrates through the external clamping mechanism, the first clamping piece is fixed to the top of the fixing column, the second clamping piece is fixed to the portal frame, and the first clamping piece and the second clamping piece are matched to clamp a plate to be tested.
Furthermore, the base is provided with a movable seat, two base rails and two fixed rails, the base rails are arranged on the base, two ends of each fixed rail are respectively connected to the tops of the two base rails, the movable seat is arranged at the bottom of each fixed rail, the movable seat is positioned between the two base rails, and the movable seat is connected with the two base rails through screws; the fixed column is fixed on the top of the movable seat.
Furthermore, slewing mechanism includes servo motor, turbine and worm, servo motor set up in the base, the worm install in servo motor's pivot, the worm with the turbine meshing, turbine fixed connection in press from both sides the bottom of tight seat, servo motor with controlling means electricity is connected.
Further, the torque testing mechanism comprises a torque sensor, an upper fixing seat and a lower fixing seat, the torque sensor is arranged between the upper fixing seat and the lower fixing seat, the external clamping mechanism is connected with the upper fixing seat, the torque sensor is connected with the lower fixing seat through screws, and the torque sensor is electrically connected with the control device.
The utility model has the advantages that: the utility model discloses an inside clamping mechanism presss from both sides tightly fixedly to the center department of the sheet material that awaits measuring, and press from both sides tightly the outside of the sheet material that awaits measuring through outside clamping mechanism, then utilize slewing mechanism to drive outside clamping mechanism and rotate, measure the moment of torsion M that outside clamping mechanism received through torque sensor, calculate the shear stress tau that the sheet material received according to moment of torsion M, then calculate strain value according to the strain image of the sheet material of the examination of awaiting measuring of camera discharge again, and note strain value and shear stress tau, thereby provide accurate analog reference value for numerical simulation analysis.
Drawings
FIG. 1 is a schematic view of example 1.
Fig. 2 is an exploded view of embodiment 1, with the pedestal, gantry, and camera omitted.
Fig. 3 is a cross-sectional view of embodiment 1 with the base, gantry, and camera omitted.
Fig. 4 is a schematic view of an external clamping mechanism of the present invention.
Fig. 5 is a schematic view of the fixing column, the movable seat, the base rail and the fixing rail of the present invention.
Figure 6 is a schematic view of the outer and inner clamping mechanisms clamping the slab to be tested.
Reference numerals: 1-base, 2-external clamping mechanism, 3-rotating mechanism, 4-internal clamping mechanism, 5-torque testing mechanism, 6-camera, 7-angle sensor, 8-portal frame, 9-partition board, 10-sheet to be tested, 11-fixed column, 12-movable seat, 13-base rail, 14-fixed rail, 21-clamping seat, 22-clamping flange, 31-servo motor, 32-turbine, 33-worm, 41-first clamping piece, 42-second clamping piece, 51-torque sensor, 52-upper fixed seat, 53-lower fixed seat, 211-second protrusion, 221-first protrusion.
Detailed Description
In order to facilitate understanding of those skilled in the art, the present invention will be further described with reference to the following examples and drawings, which are not intended to limit the present invention. The present invention will be described in detail with reference to the accompanying drawings.
Example 1
As shown in fig. 1, this embodiment provides a sheet material in-plane torsion testing apparatus to which the testing method described in embodiment 1 is applied, which includes a control device, a base 1, an external clamping mechanism 2 for clamping an outer side of a top and an outer side of a bottom of a sheet material 10 to be tested, a rotating mechanism 3 for driving the external clamping mechanism 2 to rotate, an internal clamping mechanism 4 for clamping a center of the top and a center of the bottom of the sheet material 10 to be tested, a torque testing mechanism 5 for measuring a torque applied to the external clamping mechanism 2, and a camera 6 for capturing a strain image of the sheet material 10 to be tested, where the base 1 is provided with a gantry 8, the camera 6 is arranged on the gantry 8, the external clamping mechanism 2 is arranged on the base 1 and located in the gantry 8, the internal clamping mechanism 4 is arranged between the base 1 and the gantry 8, the torque testing mechanism 5 with the slewing mechanism 3 all set up in base 1, the torque testing mechanism 5 set up in slewing mechanism 3 with between the outside clamping mechanism 2, slewing mechanism 3 the torque testing mechanism 5 with camera 6 all with the controlling means electricity is connected.
Namely, when in use, as shown in fig. 6, the outer sides of the top and the bottom of the plate material 10 to be tested are clamped by the outer clamping mechanism 2, and then the centers of the top and the bottom of the plate material 10 to be tested are clamped by the inner clamping mechanism 4; when the rotating mechanism 3 drives the external clamping mechanism 2 to rotate, the torque testing mechanism 5 can test the torque M borne by the external clamping mechanism 2; because the internal clamping mechanism 4 clamps the plate 10 to be tested, the plate 10 to be tested cannot deform in the vertical direction, and therefore the force of the torque M can calculate the shear stress τ on each point of the plate through the calculation formula of the embodiment 1; when the sheet material 10 to be tested is strained by the shear stress tau, the camera 6 can shoot an image of the strain of the sheet material 10 to be tested and transmit the image to the control device, and the control device obtains the strain value of the sheet material 10 to be tested after processing by adopting a numerical image processing method; finally, recording the strain value and the shear stress tau by a control device; after the test is finished, a user can introduce the strain value and the shear stress tau into software for numerical simulation analysis, so that accurate numerical reference is provided for the numerical simulation analysis, and the numerical simulation analysis can simulate more accurate results when a simulation analysis test is carried out on the plate 10 to be tested.
As shown in fig. 2, 3 and 5, in the present embodiment, the external clamping mechanism 2 includes a clamping seat 21 and a clamping flange 22, the rotating mechanism 3 is in transmission connection with the clamping seat 21, the clamping flange 22 is provided with a first protruding portion 221, the clamping seat 21 is provided with a second protruding portion 211, the first protruding portion 221 and the second protruding portion 211 are arranged opposite to each other, and the first protruding portion 221 and the second protruding portion 211 cooperate to clamp the slab 10 to be tested; the clamping base 21 is connected with the clamping flange 22 through screws. Namely, after the first protruding part 221 and the second protruding part 211 clamp the plate 10 to be tested, the clamping seat 21 and the clamping flange 22 are fixed in a screw locking manner, so that the accuracy of the external clamping mechanism 2 on the plate 10 to be tested is ensured.
As shown in fig. 2 and 3, in this embodiment, the internal clamping mechanism 4 includes a first clamping member 41 and a second clamping member 42, the base 1 is provided with a fixing column 11, the fixing column 11 is inserted into the external clamping mechanism 2, the first clamping member 41 is fixed to the top of the fixing column 11, the second clamping member 42 is fixed to the gantry 8, and the first clamping member 41 and the second clamping member 42 are matched to clamp the sheet material 10 to be tested. The plate material 10 to be tested is clamped through the fixed first clamping piece 41 and the second clamping piece 42, so that the bending of the point, which is the farthest point from the outer side, of the plate material 10 to be tested, namely the central point is avoided, the bending of the position between the central point and the side edge can be prevented due to the fact that the central point is clamped and fixed, the fact that part of force of the torque M is not applied to the bending of the plate material 10 to be tested is guaranteed, and therefore the accuracy of the calculated shearing stress tau is improved.
Specifically, as shown in fig. 3 and 5, the base 1 is provided with a movable seat 12, two base rails 13 and two fixed rails 14, the base rails 13 are arranged on the base 1, two ends of the fixed rails 14 are respectively connected to the tops of the two base rails 13, the movable seat 12 is arranged at the bottom of the fixed rails 14, the movable seat 12 is located between the two base rails 13, and the movable seat 12 is connected with the two base rails 13 through screws; the fixed column 11 is fixed on the top of the movable seat 12. Through the arrangement of the movable seat 12, the two base rails 13 and the two fixed rails 14, a user can adjust the position of the fixed column 11, so that the first clamping piece 41 arranged on the fixed column 11 and the second clamping piece 42 fixed on the portal frame 8 can be accurately opposite, the coincidence of the clamped positions of the top center point and the bottom center point of the plate material 10 to be tested is ensured, and the stress balance of the plate material 10 to be tested is ensured.
As shown in fig. 1 and 2, in the present embodiment, the rotating mechanism 3 includes a servo motor 31, a worm gear 32 and a worm 33, the servo motor 31 is disposed on the base 1, the worm 33 is mounted on a rotating shaft of the servo motor 31, the worm 33 is engaged with the worm gear 32, the worm gear 32 is fixedly connected to the bottom of the clamping seat 21, and the servo motor 31 is electrically connected to the control device. The servo motor 31 can accurately drive the external clamping mechanism 2 to rotate by a proper angle, and the worm wheel 32 and the worm 33 are matched to accurately transmit the rotation angle of the servo motor 31 to the external clamping mechanism 2 to rotate by the same angle. Preferably, an angle sensor 7 may be provided between the worm wheel 32 and the clamping shoe 21, the angle sensor 7 being electrically connected to the control device, so that the angle by which the clamping shoe 21 is turned can be known more precisely.
as shown in fig. 2 and 3, in the present embodiment, the torque testing mechanism 5 includes a torque sensor 51, an upper fixing seat 52 and a lower fixing seat 53, the torque sensor 51 is disposed between the upper fixing seat 52 and the lower fixing seat 53, the external clamping mechanism 2, the upper fixing seat 52, the torque sensor 51 and the lower fixing seat 53 are connected by screws, and the torque sensor 51 is electrically connected to the control device. Through the cooperation of the upper fixing seat 52 and the lower fixing seat 53, the connection between the torque sensor 51 and the clamping seat 21 is realized, so that the torque sensor 51 can more accurately test the torque M applied to the clamping seat 21.
Specifically, as shown in fig. 2 and 3, a partition 9 is disposed between the upper fixing seat 52 and the clamping seat 21, and the fixing seat 52 and the clamping seat 21 are connected by the partition 9, so that the connection between the fixing seat 52 and the clamping seat 21 is more stable.
Example 2
The embodiment provides a method for testing the in-plane torsion of a plate material, which is applied to the embodiment 1, and the method comprises the following steps:
a. The outer side of the top and the outer side of the bottom of a plate material 10 to be tested are clamped through an external clamping mechanism 2;
b. Clamping the top center and the bottom center of a plate 10 to be tested by using an internal clamping mechanism 4;
c. applying torque to the external clamping mechanism 2 through the rotating mechanism 3 to enable the external clamping mechanism 2 to rotate, and meanwhile, enabling the internal clamping mechanism 4 to be fixed;
d. Measuring the torque M applied to the internal clamping mechanism 4 by the torque testing mechanism 5;
e. shooting a strain image of the plate material 10 to be tested in a stressed state through the camera 6, and calculating a strain numerical value of the plate material 10 to be tested according to the strain image;
f. According to the torque M, calculating the shear stress tau suffered by each point of the plate material 10 to be tested;
g. The strain values and shear stress τ were recorded.
The utility model discloses an inside clamping mechanism 4 presss from both sides tightly fixedly to the center department of the sheet material 10 that awaits measuring, and press from both sides tightly the outside of the sheet material 10 that awaits measuring through outside clamping mechanism 2, then utilize slewing mechanism 3 to drive outside clamping mechanism 2 and rotate, after measuring the moment of torsion M that outside clamping mechanism 2 received through torque sensor 51, calculate the shear stress tau that the sheet material received according to moment of torsion M, then calculate strain value according to the strain image of the sheet material 10 that awaits measuring of camera 6 exhaust examination again, and note strain value and shear stress tau, thereby provide accurate simulation reference value for numerical simulation analysis. Pass through promptly the utility model discloses test the sheet material 10 that awaits measuring, can collect the accurate sheet material 10 "shear stress tau that awaits measuring and the relation curve between the numerical value" of answering, after this numerical value input to the used software of numerical simulation analysis, when being convenient for this software later to the simulation of kick-backing of this time's sheet material 10 that awaits measuring, can reach comparatively accurate result.
in this embodiment, in step f, the method specifically includes: the shape of the sheet 10 to be tested is circular according to the formulacalculating the shear stress tau borne by the plate 10 to be tested when the torque borne by the internal clamping mechanism 4 is M; wherein s is the thickness of the panel 10 to be tested, and r is the radius distance from the test point of the panel to be tested to the center of the panel 10 to be tested. Through the above formula, the shear stress τ on the position where the sheet material 10 to be tested is clamped by the external clamping mechanism 2 can be calculated.
In this embodiment, before step a, a' is further included, paint is sprayed on the upper surface of the flitch to be tested, and the paint forms a speckle group on the upper surface of the flitch to be tested. In particular, the paint colour is preferably clearly contrasted with the base colour of the panel 10 to be tested, for example: the white primer is sprayed on the plate material 10 to be tested, and then the black paint is sprayed to form a speckle group, so that when the plate material 10 to be tested is distorted due to the shear stress tau, the strain image can be shot by the camera 6 more clearly and obviously, and a more accurate strain value can be obtained.
In this embodiment, after step e, the method further includes: e', processing the strain image shot by the camera 6 by a numerical image processing method to obtain the strain numerical value of the plate 10 to be tested. The strain value can be obtained more accurately by processing the image shot by the camera 6 by a numerical image processing method.
The above description is only for the preferred embodiment of the present invention, and the present invention is not limited to the above description, and although the present invention is disclosed in the preferred embodiment, it is not limited to the above description, and any person skilled in the art can make some changes or modifications to equivalent embodiments without departing from the scope of the present invention, but all the technical solutions of the present invention are within the scope of the present invention.
Claims (6)
1. The utility model provides a twist reverse testing arrangement in sheet material plane which characterized in that: the device comprises a control device, a base, an external clamping mechanism, a rotating mechanism, an internal clamping mechanism, a torque testing mechanism and a camera, wherein the external clamping mechanism is used for clamping the outer side of the top and the outer side of the bottom of a plate to be tested, the rotating mechanism is used for driving the external clamping mechanism to rotate, the internal clamping mechanism is used for clamping the center of the top and the center of the bottom of the plate to be tested, the torque testing mechanism is used for measuring the torque applied to the external clamping mechanism, the camera is used for shooting a strain image of the plate to be tested, the base is provided with a portal frame, the camera is arranged on the portal frame, the external clamping mechanism is arranged on the base and positioned in the portal frame, the internal clamping mechanism is arranged between the base and the portal frame, the torque testing mechanism and the rotating mechanism are both arranged on the base, and the torque testing, the rotating mechanism, the torque testing mechanism and the camera are all electrically connected with the control device.
2. The sheet in-plane torsion testing apparatus of claim 1, wherein: the external clamping mechanism comprises a clamping seat and a clamping flange, the rotating mechanism is in transmission connection with the clamping seat, the clamping flange is provided with a first protruding part, the clamping seat is provided with a second protruding part, the first protruding part and the second protruding part are arranged oppositely, and the first protruding part and the second protruding part are matched for clamping a plate to be tested; the clamping seat is connected with the clamping flange through screws.
3. The sheet in-plane torsion testing apparatus of claim 1, wherein: the internal clamping mechanism comprises a first clamping piece and a second clamping piece, the base is provided with a fixing column, the fixing column penetrates through the external clamping mechanism, the first clamping piece is fixed to the top of the fixing column, the second clamping piece is fixed to the portal frame, and the first clamping piece and the second clamping piece are matched to clamp a plate to be tested.
4. The sheet in-plane torsion testing apparatus of claim 3, wherein: the base is provided with a movable seat, two base rails and two fixed rails, the base rails are arranged on the base, two ends of each fixed rail are respectively connected to the tops of the two base rails, the movable seat is arranged at the bottom of each fixed rail and located between the two base rails, and the movable seat is connected with the two base rails through screws; the fixed column is fixed on the top of the movable seat.
5. The sheet in-plane torsion testing apparatus of claim 1, wherein: the rotating mechanism comprises a servo motor, a worm wheel and a worm, the servo motor is arranged on the base, the worm is installed on a rotating shaft of the servo motor, the worm is meshed with the worm wheel, the worm wheel is fixedly connected to the bottom of the external clamping mechanism, and the servo motor is electrically connected with the control device.
6. The sheet in-plane torsion testing apparatus of claim 1, wherein: the torque testing mechanism comprises a torque sensor, an upper fixing seat and a lower fixing seat, the torque sensor is arranged between the upper fixing seat and the lower fixing seat, the external clamping mechanism is connected with the upper fixing seat, the torque sensor is connected with the lower fixing seat through screws, and the torque sensor is electrically connected with the control device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822270570.9U CN209784087U (en) | 2018-12-29 | 2018-12-29 | Torsion testing device in sheet material plane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822270570.9U CN209784087U (en) | 2018-12-29 | 2018-12-29 | Torsion testing device in sheet material plane |
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| Publication Number | Publication Date |
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| CN209784087U true CN209784087U (en) | 2019-12-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201822270570.9U Active CN209784087U (en) | 2018-12-29 | 2018-12-29 | Torsion testing device in sheet material plane |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109556974A (en) * | 2018-12-29 | 2019-04-02 | 江西豪斯特汽车零部件有限公司 | A kind of plate plane is interior to reverse test device and method |
-
2018
- 2018-12-29 CN CN201822270570.9U patent/CN209784087U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109556974A (en) * | 2018-12-29 | 2019-04-02 | 江西豪斯特汽车零部件有限公司 | A kind of plate plane is interior to reverse test device and method |
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