CN219830608U - Steel plate longitudinal negative stiffness measuring device - Google Patents
Steel plate longitudinal negative stiffness measuring device Download PDFInfo
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- CN219830608U CN219830608U CN202321120599.3U CN202321120599U CN219830608U CN 219830608 U CN219830608 U CN 219830608U CN 202321120599 U CN202321120599 U CN 202321120599U CN 219830608 U CN219830608 U CN 219830608U
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- steel plate
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- sliding block
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 66
- 239000010959 steel Substances 0.000 title claims abstract description 66
- 238000012360 testing method Methods 0.000 claims abstract description 13
- 230000006835 compression Effects 0.000 claims description 13
- 238000007906 compression Methods 0.000 claims description 13
- 238000000034 method Methods 0.000 abstract description 8
- 230000008569 process Effects 0.000 abstract description 8
- 229910000639 Spring steel Inorganic materials 0.000 abstract description 6
- 238000002955 isolation Methods 0.000 abstract description 5
- 238000000418 atomic force spectrum Methods 0.000 abstract description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The utility model belongs to the field of vibration isolation of aerospace, and particularly relates to a steel plate longitudinal negative stiffness measuring device which comprises a lower part used for a steel plate clamping device and an upper part loading device. When the lower steel plate clamping device is used, the lower steel plate clamping device is required to be placed on a base of a universal testing machine, so that the steel plate can be effectively fixed, and the buckling state of the steel plate can be adjusted through a threaded rod with a scale hand wheel; the upper loading device is arranged on a loading arm of the universal testing machine when in use, a displacement-force curve can be obtained in the loading process, and the stiffness property of the spring steel plate can be obtained through the curve.
Description
Technical Field
The utility model belongs to the field of vibration isolation of aerospace, and particularly relates to a device for measuring longitudinal negative rigidity of a steel plate.
Background
In the engineering fields of aerospace and the like, excessive vibration inevitably has irreversible influence on working equipment, the service life of the working equipment is reduced, and the working equipment is seriously and even directly damaged, so that the research on vibration isolation technology is very important. In research and development of vibration reduction/isolation technology, it has been found that spring steel plates have a negative stiffness characteristic that can be utilized, and the application of the spring steel plates provides a new direction and concept for the design of vibration isolation devices. In practical application, it is found that steel plates with different sizes have different rigidity effects in different buckling states. For more reasonable practical application of the steel plate, the rigidity measurement of the steel plate is important. The existing spring steel plate stiffness measuring device is complex, and the buckling state of the steel plate cannot be well adjusted.
Disclosure of Invention
In order to solve one of the problems, the utility model provides a steel plate longitudinal negative stiffness measuring device which is placed on a base workbench of a universal testing machine and comprises a loading unit, a supporting slide rail 1, a first clamping unit, a second clamping unit and a buckling adjusting unit;
the loading unit comprises a fixed compression bar 2 and a loading pressure head 3 arranged at the head end of the fixed compression bar 2;
the support slide rail 1 is arranged on the workbench and provided with a slide groove 4;
the first clamping unit is identical to the second clamping unit in structure and is symmetrically arranged on the supporting slide rail 1, and comprises a sliding block 5 and a steel plate fixing unit, wherein the steel plate fixing unit is matched with the sliding block 5 to fix one side of a steel plate, and the other end of the steel plate is fixed on the second clamping unit;
buckling adjustment unit is located the first clamping unit outside, including a scale screw rod 6, fixes on supporting slide rail 1 through connecting piece 11, all be provided with on connecting piece 11 and the slider 5 of first clamping unit with scale screw rod 6 matched with screw hole, scale screw rod 6 is to wearing two screw holes, rotatory scale screw rod 6 for the slider 5 of first clamping unit slides along supporting slide rail 1.
Further, the steel plate fixing unit comprises an upper pressing piece, the upper pressing piece is fixed on the sliding block 5 of the first clamping unit through a bolt, and the steel plate is clamped between the upper pressing piece and the sliding block 5 to fix one end of the steel plate.
Further, the steel plate fixing unit comprises a fixing seat 7 and a rotating part,
the fixed seat 7 is provided with a rotating shaft 8, and one end of the rotating shaft is fixed on the sliding block 5 through a bolt;
the tail end of the rotating part is rotatably sleeved on a rotating shaft 8 of the fixed seat 7, the head end of the rotating part is provided with a fixed table 9 and a fixed pressing sheet 10, and the fixed table 9 and the fixed pressing sheet 10 are fixed through bolts.
The utility model provides a rigidity measuring device of a spring steel plate, which comprises a lower part used for a steel plate clamping device and an upper loading device. When the lower steel plate clamping device is used, the lower steel plate clamping device is required to be placed on a base of a universal testing machine, so that the steel plate can be effectively fixed, and the buckling state of the steel plate can be adjusted through a threaded rod with a scale hand wheel; the upper loading device is arranged on a loading arm of the universal testing machine when in use, a displacement-force curve can be obtained in the loading process, and the stiffness property of the spring steel plate can be obtained through the curve.
Drawings
FIG. 1 is a schematic diagram of the structure of the utility model;
the device comprises a support slide rail 1, a compression bar 2, a pressure head 3, a slide groove 4, a slide block 5, a scale screw rod 6, a fixed seat 7, a rotating shaft 8, a fixed table 9, a fixed pressing sheet 10, a connecting piece 11 and a bolt 12.
Detailed Description
The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
Referring to fig. 1, in order to effectively and accurately measure the rigidity of steel plates of different sizes and different initial states, the present utility model provides a steel plate rigidity measuring apparatus including a loading unit, a support rail 1, a first clamping unit, a second clamping unit, and a buckling adjustment unit;
the loading unit comprises a fixed compression bar 2 and a loading pressure head 3 arranged at the head end of the fixed compression bar 2;
the support slide rail 1 is arranged on a base workbench of the universal testing machine, and a T-shaped chute 4 is arranged on the support slide rail 1;
the first clamping unit is identical to the second clamping unit in structure and is symmetrically arranged on the supporting slide rail 1, and comprises a sliding block 5 and a steel plate fixing unit, wherein the steel plate fixing unit is matched with the sliding block 5 to fix one side of a steel plate, and the other end of the steel plate is fixed on the second clamping unit;
buckling adjustment unit is located the first clamping unit outside, including a scale screw rod 6, fixes on supporting slide rail 1 through connecting piece 11, all be provided with on connecting piece 11 and the slider 5 of first clamping unit with scale screw rod 6 matched with screw hole, scale screw rod 6 is to wearing two screw holes, rotatory scale screw rod 6 for the slider 5 of first clamping unit slides along supporting slide rail 1.
The fixed buckling of the steel plate in this solution is achieved by two sliders 5. Specifically, the slide block 5 is provided with a groove matched with the T-shaped groove of the workbench supporting slide rail 1. In the first clamping unit, an initial sliding block 5 is arranged beside a connecting piece 11 and is in contact with the connecting piece 11, and threaded holes matched with a scale screw rod 6 are reserved at the left end of the sliding block 5 and on the connecting piece 11. The sliding blocks 5 in the first clamping unit can freely slide left and right, so as to meet the requirement of measuring steel plates with different lengths, and the two sliding blocks 5 with the positions adjusted are respectively fixed by fixing bolts.
The tail end of the scale screw rod 6 is arranged inside the sliding block 5 of the first clamping unit, the sliding block 5 moves rightwards by rotating the scale screw rod 6, the moving distance is obtained by reading scales, the buckling state of the steel plate can be obtained, and the scale screw rod 6 is fixed.
As an improvement of the scheme, rotary steel plate fixing units consisting of a fixing base 7, a rotating shaft 8 and rotating parts are respectively fixed on the corresponding sliding blocks 5 through fixing bolts. Specifically, the tail end of the rotating part is rotatably sleeved on the rotating shaft 8 of the fixed seat 7, the head end of the rotating part is provided with a fixed table 9 and a fixed pressing sheet 10, and one end of the steel plate is arranged between the fixed table 9 and the fixed pressing sheet 10 and is fixed through a bolt 12. The rotary steel plate fixing unit enables two ends of the steel plate to rotate along with loading in the loading process, and further obtains the rigidity of the steel plate in different buckling states.
As an improvement of the scheme, the rotating shaft 8 device can be taken down according to actual measurement requirements, and the steel plate is clamped by matching the upper pressing piece with the sliding block 5, so that two ends of the steel plate are always horizontally fixed.
The fixed compression bar 2 is provided with a groove matched with a working arm of the universal testing machine, the fixed compression bar can be fixed on the universal testing machine and moves along with the working arm, the lower part of the fixed compression bar is provided with a loading pressure head 3 which directly contacts with a steel plate to be measured, in the measuring process, the connected compression bar 2 downwards presses the steel plate by controlling the universal testing machine, and a testing machine system outputs a force-displacement curve in the downwards pressing process, so that the rigidity characteristic of the measured steel plate is obtained.
Buckling process: after the steel plate is clamped, the steel plate is subjected to force-applying buckling by rotating the scale screw rod 6, and as the scale screw rod 6 is provided with scales, the moving distance of the left end of the clamped steel plate can be directly calculated, so that the buckling state of the steel plate is obtained, after the steel plate rotates to reach the expected buckling state, the sliding block 5 and the scale screw rod 6 are fixed through the fixing bolts, and the screw rod or the sliding rail 1 can be respectively and downwards propped up through the two bolts 12 to realize fixation.
The loading process comprises the following steps: the fixed compression bar 2 is fixed on a working arm of the universal testing machine, the lower steel plate clamping device and the fixed compression bar 2 are adjusted, the loading pressure head 3 is positioned right above the steel plate, the working arm is operated to enable the loading pressure head 3 to start loading after being just contacted with the steel plate, a force-displacement curve is output through the universal testing machine in the loading process, and therefore the horizontal state of the steel plate or the longitudinal negative stiffness characteristic after buckling is obtained.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.
Claims (3)
1. The utility model provides a steel sheet vertical negative rigidity measuring device, places on the base workstation of universal testing machine, its characterized in that: the device comprises a loading unit, a supporting slide rail (1), a first clamping unit, a second clamping unit and a buckling adjustment unit;
the loading unit comprises a fixed compression bar (2) and a loading pressure head (3) arranged at the head end of the fixed compression bar (2);
the support slide rail (1) is arranged on the workbench and provided with a slide groove (4);
the first clamping unit is identical to the second clamping unit in structure and is symmetrically arranged on the supporting slide rail (1), and comprises a sliding block (5) and a steel plate fixing unit, wherein the steel plate fixing unit is matched with the sliding block (5) to fix one side of the steel plate, and the other end of the steel plate is fixed on the second clamping unit;
the buckling adjustment unit is positioned at the outer side of the first clamping unit and comprises a scale screw rod (6), the scale screw rod is fixed on the support sliding rail (1) through a connecting piece (11), threaded holes matched with the scale screw rod (6) are formed in the connecting piece (11) and the sliding block (5) of the first clamping unit, and the scale screw rod (6) penetrates through the two threaded holes; the scale screw (6) is rotated such that the slide (5) of the first clamping unit slides along the support slide (1).
2. A steel plate longitudinal negative stiffness measuring device according to claim 1, wherein: the steel plate fixing unit comprises an upper pressing piece, the upper pressing piece is fixed on a sliding block (5) of the first clamping unit through a bolt, and the steel plate is clamped between the upper pressing piece and the sliding block (5) to fix one end of the steel plate.
3. A steel plate longitudinal negative stiffness measuring device according to claim 1, wherein: the steel plate fixing unit comprises a fixing seat (7) and a rotating part,
the fixed seat (7) is provided with a rotating shaft (8), and one end of the rotating shaft is fixed on the sliding block (5) through a bolt;
the tail end of the rotating part is rotatably sleeved on a rotating shaft (8) of the fixed seat (7), the head end of the rotating part is provided with a fixed table (9) and a fixed pressing sheet (10), and the fixed table (9) and the fixed pressing sheet (10) are fixed through bolts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321120599.3U CN219830608U (en) | 2023-05-11 | 2023-05-11 | Steel plate longitudinal negative stiffness measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321120599.3U CN219830608U (en) | 2023-05-11 | 2023-05-11 | Steel plate longitudinal negative stiffness measuring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219830608U true CN219830608U (en) | 2023-10-13 |
Family
ID=88281861
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321120599.3U Active CN219830608U (en) | 2023-05-11 | 2023-05-11 | Steel plate longitudinal negative stiffness measuring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219830608U (en) |
-
2023
- 2023-05-11 CN CN202321120599.3U patent/CN219830608U/en active Active
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