CN209820720U - Elasticity test fixture - Google Patents
Elasticity test fixture Download PDFInfo
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- CN209820720U CN209820720U CN201920694816.7U CN201920694816U CN209820720U CN 209820720 U CN209820720 U CN 209820720U CN 201920694816 U CN201920694816 U CN 201920694816U CN 209820720 U CN209820720 U CN 209820720U
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Abstract
The utility model belongs to the technical field of machinery for the experimental loading technique of elastomer relates to an elasticity test fixture. The device comprises a rigid clamping device and an elastic transition clamp; the rigid clamping device comprises a front end dummy part, a left front clamping plate, a right front clamping plate, a left main rib clamping plate, a right main rib clamping plate, four positioning pins and a connecting bolt; the elastic transition clamp comprises a bottom plate, a high plate, a low plate, a rigid support, a base plate, an adjusting bolt, a fixing bolt and channel steel. According to the using method of the test fixture, the mounting stress of the test piece for the test can be eliminated, the strain change of the strain gauge on the test piece can be changed through the position change of the adjusting bolt, the test fixture can be suitable for tests of test pieces of different models, and the using state of the test piece can be better simulated. The utility model discloses have good installation manufacturability, use portably, reduce the anchor clamps cost, improve the accuracy of test data to the design of scientific research product, design.
Description
Technical Field
The utility model belongs to the technical field of machinery for the experimental loading technique of elastomer relates to an elasticity test fixture.
Background
The existing test piece is tested on a rigid test fixture, but with the continuous accumulation of experience, the clamping mode of the test fixture and the performance index of the test fixture directly influence the test result, such as the performance of materials used by the test fixture, the mode of connecting the test piece with the test fixture, and the pre-tightening force of the test fixture can directly influence the service life of the test piece, the clamping mode of the test piece can influence the distribution condition of the stress on the test piece, the stress of the weak point of the test piece is concentrated, the bearing limit of the test piece is broken, the damage of different conditions occurs, the test action is weakened, the inaccuracy of test data is caused, an error result can be generated on the test piece, the economic loss is seriously influenced, and the product design result can even be influenced. In order to better simulate the use state of the test piece, the best method is to find an identical product as the connecting piece, but the test cost is very high and the cost is very high.
SUMMERY OF THE UTILITY MODEL
Problem to prior art existence, the utility model provides an elasticity test fixture for structural strength, the experimental elasticity of rigidity are experimental.
The technical scheme of the utility model is that:
an elastic test fixture comprises a rigid clamping device and an elastic transition fixture; the rigid clamping device comprises a front end dummy part 6, a left front clamping plate 7, a right front clamping plate 9, a left main rib clamping plate 8, a right main rib clamping plate 10, four positioning pins and connecting bolts; the elastic transition clamp comprises a bottom plate 1, a high plate 2, a low plate 3, a rigid support 4, a base plate 5, an adjusting bolt 16, a fixing bolt and channel steel 15;
the rigid clamping device is arranged on the bottom plate 1, the left main rib clamping plate 8 and the right main rib clamping plate 10 are arc-shaped rib plates for clamping experimental pieces and are connected to the bottom plate 1 through positioning pins and connecting bolts, the left main rib clamping plate 8 and the right main rib clamping plate 10 are provided with a bushing a13, a bushing b14 and a plurality of mounting holes, and the bushing a13 and the bushing b14 are installed in an interference fit manner with the left main rib clamping plate 8 and the right main rib clamping plate 10 to play a guiding role in the preparation of upper holes of the experimental pieces and have high wear resistance; the test piece is connected with the left main rib clamping plate 8 and the right main rib clamping plate 10 through bolts, so that the existing process hole on the test piece is ensured to be coaxial with the mounting holes of the two main rib clamping plates, and the hole on one side of the test piece can be conveniently drilled through an electric drill; the front end dummy piece 6 simulates an assembly piece and is fixed on one side of the bottom plate 1 through a front end bolt 11 and a nut; the left front clamping plate 7 and the right front clamping plate 9 are arranged among the left main rib clamping plate 8, the right main rib clamping plate 10 and the front end dummy part 6, are arc-shaped rib plates for fastening a test part and are fixed on the bottom plate 1 through bolts;
the elastic transition clamp is used for adjusting the rigidity coefficient of the rigid clamping device so as to adapt to different test conditions; the base plate 1 is provided with a plurality of elliptical holes for arranging data lines and observing the internal structural state of the test piece, and the test piece is in a closed state after being installed, so that the test piece is not beneficial to being checked in midway; the high plate 2 is an elastic device and is connected to the lower end of the bottom plate 1, the high plate is connected with the low plate 3 through an adjusting bolt 16, the rigidity coefficient layout of the upper rigid clamping device is adjusted through the position change of the adjusting bolt 16, and uneven load distribution is adjusted; the side surface of the short plate 3 is provided with a rigid support 4, and the rigid support 4 is connected with the short plate 3 through a fixing bolt, so that the rigidity of the short plate 3 is ensured, and the hoisting function is realized; when the device is connected with the rigid support 4, the short plate 3 is used as a rigid structure, when the device is not connected with the rigid support 4, the short plate 3 is used as an elastic structure, and the rigidity coefficient of the device is adjusted through experimental data and theoretical design; the high plate 2, the low plate 3, the rigid support 4 and the adjusting bolt 16 jointly form an adjusting device, and the rigidity coefficient is adjusted by the up-and-down movement of the adjusting bolt 16 so as to adapt to different test conditions; the bottom ends of the high plate 2, the low plate 3 and the rigid support 4 are connected with the backing plate 5, and the lower surface of the backing plate 5 is welded with a channel steel 15, so that the local strength is improved, the bending resistance is increased, and the high plate is connected with a ground rail.
A method for measuring the rigidity and the strength of a test piece by an elastic test fixture comprises the following steps:
step one, calculating a performance index of a connecting piece of a test piece in a use state by using finite element analysis software to select a reasonable rigidity coefficient; the three-dimensional drawing software simulates the installation of a test piece, and draws a test piece and clamp installation diagram;
secondly, scribing; selecting a test space on site, fixing an elastic test fixture at an appointed position through a foundation bolt according to a test piece and a fixture installation diagram, and fixing a loading point of the test piece;
thirdly, connecting the left main rib clamping plate 8 and the right main rib clamping plate 10 to the bottom plate 1 through positioning pins and connecting bolts, mounting a test piece on the main rib clamping plates, ensuring that an existing process hole on the test piece is coaxial with a mounting hole of a test fixture, and drilling a hole on one side of the test piece by using an electric drill; the method specifically comprises the following steps: the left main rib clamping plate 8 is connected with a ribbed plate on one side of a test piece through a bolt, the ribbed plate is connected to the bottom plate 1 through a positioning pin, the clamping plate on the other side is abutted against the test piece and is matched with a drill, after the left main rib clamping plate is fixed through the bolt, the right main rib clamping plate 10 is connected with an elliptical hole of the bottom plate 1 through a connecting bolt, the elliptical hole is used for adjusting the position of the right main rib clamping plate 10, the mounting stress can be eliminated in the mounting process, and the clamping plate is connected with the elastic test fixture bottom plate through the bolt;
and fourthly, moving the adjusting bolt 16 up and down, and adjusting the rigidity coefficient of the rigidity test fixture to adapt to different test conditions.
The utility model has the advantages that:
at present, the elastic test fixture is used in the test, and the material of the test fixture is strictly selected according to the state of a test piece in use to be similar to the material, so that the connection state is ensured to be close to the use condition. According to the using method of the test fixture, the mounting stress of the test piece for the test can be eliminated, the strain change of the strain gauge on the test piece can be changed through the position change of the adjusting bolt, the test fixture can be suitable for the tests of the test pieces of different models, the clamping mode of the original test piece is guaranteed, the clamping mode is basically consistent with the using state of the test piece, the using state of the test piece can be better simulated, the quality requirement of the test is further improved, and the error between the test value and the true value is reduced.
The fixture has good installation manufacturability, is simple and convenient to use, reduces the design cost and the manufacturing cost of the fixture, and improves the accuracy of the design and the shaping of the test data on scientific research products.
Drawings
FIG. 1 is a schematic structural view of an elasticity test fixture;
FIG. 2 is a cross-sectional view A-A of an elasticity test fixture;
FIG. 3 is a top view of an elasticity test fixture;
FIG. 4 is a schematic diagram of an elastic test fixture in assembly;
FIG. 5 is a schematic view of a front end dummy of an elasticity test fixture;
FIG. 6 is a schematic structural view of a base plate of an elasticity test fixture;
FIG. 7(a) is a side view of the left main rib clip of an elasticity test fixture;
FIG. 7(b) is a top view of the left main rib clip of an elasticity test fixture;
in the figure: 1, a bottom plate; 2, high plate; 3 short plates; 4, a rigid support; 5, backing plates; 6, front end dummy piece; 7, a left front clamping plate; 8 left main rib snap-gauge; 9, a right front clamping plate; 10 right main rib snap-gauge; 11 front end bolt; 13, a bushing a; 14, a bushing b; 15, channel steel; 16 adjusting the bolt.
Detailed Description
The following further describes a specific embodiment of the present invention with reference to the drawings and technical solutions.
As shown in fig. 1, an elastic test fixture comprises a rigid clamping device and an elastic transition fixture; the rigid clamping device comprises a front end dummy part 6, a left front clamping plate 7, a right front clamping plate 9, a left main rib clamping plate 8, a right main rib clamping plate 10, four positioning pins and connecting bolts; the elastic transition clamp comprises a bottom plate 1, a high plate 2, a low plate 3, a rigid support 4, a base plate 5, an adjusting bolt 16, a fixing bolt and channel steel 15;
the rigid clamping device is arranged on the bottom plate 1, the left main rib clamping plate 8 and the right main rib clamping plate 10 are arc-shaped rib plates for clamping experimental pieces and are connected to the bottom plate 1 through positioning pins and connecting bolts, the left main rib clamping plate 8 and the right main rib clamping plate 10 are provided with a bushing a13, a bushing b14 and a plurality of mounting holes, and the bushing a13 and the bushing b14 are installed in an interference fit manner with the left main rib clamping plate 8 and the right main rib clamping plate 10 to play a guiding role in the preparation of upper holes of the experimental pieces and have high wear resistance; the test piece is connected with the left main rib clamping plate 8 and the right main rib clamping plate 10 through bolts, so that the existing process hole on the test piece is ensured to be coaxial with the mounting holes of the two main rib clamping plates, and the hole on one side of the test piece can be conveniently drilled through an electric drill; the front end dummy piece 6 simulates an assembly piece and is fixed on one side of the bottom plate 1 through a front end bolt 11 and a nut; the left front clamping plate 7 and the right front clamping plate 9 are arranged among the left main rib clamping plate 8, the right main rib clamping plate 10 and the front end dummy part 6, are arc-shaped rib plates for fastening a test part and are fixed on the bottom plate 1 through bolts;
the elastic transition clamp is used for adjusting the rigidity coefficient of the rigid clamping device so as to adapt to different test conditions; the base plate 1 is provided with a plurality of elliptical holes for arranging data lines and observing the internal structural state of the test piece, and the test piece is in a closed state after being installed, so that the test piece is not beneficial to being checked in midway; the high plate 2 is an elastic device and is connected to the lower end of the bottom plate 1, the high plate is connected with the low plate 3 through an adjusting bolt 16, the rigidity coefficient layout of the upper rigid clamping device is adjusted through the position change of the adjusting bolt 16, and uneven load distribution is adjusted; the side surface of the short plate 3 is provided with a rigid support 4, and the rigid support 4 is connected with the short plate 3 through a fixing bolt, so that the rigidity of the short plate 3 is ensured, and the hoisting function is realized; when the device is connected with the rigid support 4, the short plate 3 is used as a rigid structure, when the device is not connected with the rigid support 4, the short plate 3 is used as an elastic structure, and the rigidity coefficient of the device is adjusted through experimental data and theoretical design; the high plate 2, the low plate 3, the rigid support 4 and the adjusting bolt 16 jointly form an adjusting device, and the rigidity coefficient is adjusted by the up-and-down movement of the adjusting bolt 16 so as to adapt to different test conditions; the bottom ends of the high plate 2, the low plate 3 and the rigid support 4 are connected with the backing plate 5, and the lower surface of the backing plate 5 is welded with a channel steel 15, so that the local strength is improved, the bending resistance is increased, and the high plate is connected with a ground rail.
A method for measuring the rigidity and the strength of a test piece by an elastic test fixture comprises the following steps:
step one, calculating a performance index of a connecting piece of a test piece in a use state by using finite element analysis software to select a reasonable rigidity coefficient; the three-dimensional drawing software simulates the installation of a test piece, and draws a test piece and clamp installation diagram;
secondly, scribing; selecting a test space on site, fixing an elastic test fixture at an appointed position through a foundation bolt according to a test piece and a fixture installation diagram, and fixing a loading point of the test piece;
thirdly, connecting the left main rib clamping plate 8 and the right main rib clamping plate 10 to the bottom plate 1 through positioning pins and connecting bolts, mounting a test piece on the main rib clamping plates, ensuring that an existing process hole on the test piece is coaxial with a mounting hole of a test fixture, and drilling a hole on one side of the test piece by using an electric drill; the method specifically comprises the following steps: the left main rib clamping plate 8 is connected with a ribbed plate on one side of a test piece through a bolt, the ribbed plate is connected to the bottom plate 1 through a positioning pin, the clamping plate on the other side is abutted against the test piece and is matched with a drill, after the left main rib clamping plate is fixed through the bolt, the right main rib clamping plate 10 is connected with an elliptical hole of the bottom plate 1 through a connecting bolt, the elliptical hole is used for adjusting the position of the right main rib clamping plate 10, the mounting stress can be eliminated in the mounting process, and the clamping plate is connected with the elastic test fixture bottom plate through the bolt;
and fourthly, moving the adjusting bolt 16 up and down, and adjusting the rigidity coefficient of the rigidity test fixture to adapt to different test conditions.
As shown in figure 4, the test fixture can meet the requirements of test pieces with different rigidity, and the axis mapping chart in the figure indicates that two elastic test fixtures are installed together to form a set of test fixture together with a rigid test fixture, so that the test fixtures can be assembled according to test requirements.
In addition to the above embodiments, the present invention may have other embodiments. All the technical solutions formed by adopting equivalent substitutions or equivalent transformations fall within the protection scope claimed by the present invention.
Claims (1)
1. The elasticity test fixture is characterized by comprising a rigid clamping device and an elastic transition fixture; the rigid clamping device comprises a front end dummy part (6), a left front clamping plate (7), a right front clamping plate (9), a left main rib clamping plate (8), a right main rib clamping plate (10), four positioning pins and a connecting bolt; the elastic transition clamp comprises a bottom plate (1), a high plate (2), a low plate (3), a rigid support (4), a base plate (5), an adjusting bolt (16), a fixing bolt and channel steel (15);
the rigid clamping device is arranged on the bottom plate (1), the left main rib clamping plate (8) and the right main rib clamping plate (10) are arc-shaped rib plates for clamping experimental parts and are connected to the bottom plate (1) through positioning pins and connecting bolts, a bushing a (13), a bushing b (14) and a plurality of mounting holes are formed in the left main rib clamping plate (8) and the right main rib clamping plate (10), and the bushing a (13) and the bushing b (14) are installed with the left main rib clamping plate (8) and the right main rib clamping plate (10) in an interference fit mode to play a guiding role in the preparation of holes in the experimental parts and have high wear resistance; the test piece is connected with the left main rib clamping plate (8) and the right main rib clamping plate (10) through bolts, so that the existing process holes on the test piece are ensured to be coaxial with the mounting holes of the two main rib clamping plates, and the holes on one side of the test piece can be conveniently drilled through an electric drill; the front-end dummy piece (6) simulates an assembly piece and is fixed on one side of the bottom plate (1) through a front-end bolt (11) and a nut; the left front clamping plate (7) and the right front clamping plate (9) are arranged among the left main rib clamping plate (8), the right main rib clamping plate (10) and the front end dummy part (6), are arc-shaped rib plates for fastening a test part and are fixed on the bottom plate (1) through bolts;
the elastic transition clamp is used for adjusting the rigidity coefficient of the rigid clamping device so as to adapt to different test conditions; the bottom plate (1) is provided with a plurality of elliptical holes for arranging data lines and observing the internal structural state of the test piece, and the test piece is in a closed state after being installed, so that the test piece is not beneficial to being checked in midway; the high plate (2) is an elastic device and is connected to the lower end of the bottom plate (1), the high plate is connected with the low plate (3) through an adjusting bolt (16), the rigidity coefficient layout of the upper rigid clamping device is adjusted through the position change of the adjusting bolt (16), and the unevenly distributed load is adjusted; the rigid support (4) is arranged on the side face of the short plate (3), and the rigid support (4) is connected with the short plate (3) through a fixing bolt and used for ensuring the rigidity of the short plate (3) and playing a role in hoisting; when the device is connected with the rigid support (4), the short plate (3) is used as a rigid structure, when the device is not connected with the rigid support (4), the short plate (3) is used as an elastic structure, and the rigidity coefficient of the device is adjusted through experimental data and theoretical design; the high plate (2), the low plate (3), the rigid support (4) and the adjusting bolt (16) jointly form an adjusting device, and the rigidity coefficient is adjusted by the up-and-down movement of the adjusting bolt (16) to adapt to different test conditions; the bottom ends of the high plate (2), the low plate (3) and the rigid support (4) are connected with the backing plate (5), and channel steel (15) is welded below the backing plate (5), so that the local strength is improved, the bending resistance is increased, and the high-strength rigid support is connected with a ground rail.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920694816.7U CN209820720U (en) | 2019-05-16 | 2019-05-16 | Elasticity test fixture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920694816.7U CN209820720U (en) | 2019-05-16 | 2019-05-16 | Elasticity test fixture |
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| Publication Number | Publication Date |
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| CN209820720U true CN209820720U (en) | 2019-12-20 |
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| CN201920694816.7U Active CN209820720U (en) | 2019-05-16 | 2019-05-16 | Elasticity test fixture |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110146239A (en) * | 2019-05-16 | 2019-08-20 | 沈阳飞机工业（集团）有限公司 | A kind of elasticity test fixture and application method |
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2019
- 2019-05-16 CN CN201920694816.7U patent/CN209820720U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110146239A (en) * | 2019-05-16 | 2019-08-20 | 沈阳飞机工业（集团）有限公司 | A kind of elasticity test fixture and application method |
| CN110146239B (en) * | 2019-05-16 | 2024-04-16 | 沈阳飞机工业（集团）有限公司 | Elasticity test clamp and use method |
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