CN112986006B - Test tool and test method for bending mechanical property of sandwich structure - Google Patents
Test tool and test method for bending mechanical property of sandwich structure Download PDFInfo
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- CN112986006B CN112986006B CN202110188336.5A CN202110188336A CN112986006B CN 112986006 B CN112986006 B CN 112986006B CN 202110188336 A CN202110188336 A CN 202110188336A CN 112986006 B CN112986006 B CN 112986006B
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- 238000005452 bending Methods 0.000 title claims abstract description 98
- 238000012360 testing method Methods 0.000 title claims abstract description 36
- 238000010998 test method Methods 0.000 title abstract description 4
- 238000006073 displacement reaction Methods 0.000 claims abstract description 8
- 238000005259 measurement Methods 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 description 7
- 239000010959 steel Substances 0.000 description 7
- 230000000712 assembly Effects 0.000 description 3
- 238000000429 assembly Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/20—Investigating strength properties of solid materials by application of mechanical stress by applying steady bending forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/04—Chucks
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0023—Bending
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/0042—Pneumatic or hydraulic means
- G01N2203/0048—Hydraulic means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/04—Chucks, fixtures, jaws, holders or anvils
- G01N2203/0423—Chucks, fixtures, jaws, holders or anvils using screws
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
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- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention provides a test fixture and a test method for bending mechanical properties of a sandwich structure, the test fixture comprises a bending device, the bending device comprises a base plate, a bending plate, driving components and a plurality of base shafts, the driving components are arranged at the bottom of the base plate, execution ends of the two driving components penetrate through the base plate to be connected with the bottom of the bending plate, limit components are arranged on two sides of the bending plate, the plurality of base shafts penetrate through the bending plate, fixing devices are arranged at two ends of each base shaft, the fixing devices comprise a slip ring and two sliding rails, the slip ring is sleeved with side walls of the base shaft, a braking component is arranged at the bottom of the slip ring, a tool pressing frame is arranged at the top of the slip ring, a lifting component is arranged between the slip ring and the tool pressing frame, the bottoms of the two sliding rails are fixed on the base plate, a positioning block is connected between the two sliding rails in a sliding mode, one end of the base shaft is clamped on one side of the positioning block, and a displacement component is arranged on one side of the positioning block. The test tool provided by the invention can be used for conveniently performing bending test on different positions of the sandwich structure.
Description
Technical Field
The invention relates to the technical field of sandwich structure testing, in particular to a testing tool and a testing method for bending mechanical properties of a sandwich structure.
Background
In the technical field of civil engineering, bending mechanical properties of products with sandwich structures are tested, and bending mechanical properties of the products can be known. At present, a testing tool for bending mechanical properties of a sandwich structure is an important testing tool.
The prior patent (application number: 202020588310.0) proposes a steel bar bending strength testing tool, which comprises a supporting seat and a pressing seat, wherein a sliding groove is formed in the upper surface of the supporting seat, two groups of sliding seats are slidably connected in the sliding groove, bearing blocks for placing steel bars are arranged on the two groups of sliding seats, the bearing blocks are arranged in a U shape, the pressing seat is arranged above the supporting seat, and the pressing seat is positioned between the two groups of bearing blocks. The product is favorable for improving the safety of the steel bar sample during test and improving the detection result of the steel bar sample.
The product in the patent is beneficial to improving the safety of the steel bar sample during testing and improving the detection result of the steel bar sample. However, in the measuring process, the bending mechanical property test can be performed on the steel bar at one point, and the measuring position is too single.
Disclosure of Invention
Based on the above, the invention aims to provide a testing tool and a testing method for bending mechanical properties of a sandwich structure, which are used for solving the technical problems in the prior art.
The invention provides a test fixture for bending mechanical properties of a sandwich structure, which comprises a bending device, wherein the bending device comprises a base plate, a bending plate, a driving assembly and a plurality of base shafts, the driving assembly is arranged at the bottom of the base plate, execution ends of the two driving assemblies penetrate through the base plate and are connected with the bottom of the bending plate, limit assemblies are arranged on two sides of the bending plate, the plurality of base shafts penetrate through the bending plate, and fixing devices are arranged at two ends of each base shaft;
the fixing device comprises a slip ring and two sliding rails, the slip ring is sleeved with the side wall of a base shaft, a brake component is arranged at the bottom of the slip ring, a tool pressing frame is arranged at the top of the slip ring, a lifting component is arranged between the slip ring and the tool pressing frame, the bottoms of the two sliding rails are fixed on a base plate, a positioning block is connected between the two sliding rails in a sliding mode, one end of the base shaft is clamped on the side wall of the positioning block, and a displacement component is arranged on one side of the positioning block.
Preferably, the bending plate comprises four bottom plates, two adjacent bottom plates are hinged on corresponding base shafts, and each bottom plate and each base shaft are provided with two limiting through holes. In this preferred embodiment, the bending plate is bendable at different positions by means of the structural design of the adjacent base plates hinged on the corresponding base shaft.
Preferably, the driving assembly comprises a driving hydraulic cylinder and an annular frame, wherein the annular frame is connected with one end of the bottom of the bending plate, the driving hydraulic cylinder is fixed at the bottom of the base plate, the output end of the driving hydraulic cylinder penetrates through the base plate and extends to the upper portion to be connected with a driving rod, and the driving rod is connected with the inner wall of the annular frame in a sliding mode. In the preferred embodiment, the drive force is provided for rotation of the base plate by a drive assembly.
Preferably, the limiting assembly comprises an extension plate, two pneumatic cylinders are connected to the bottom of the extension plate, the output ends of the two pneumatic cylinders are connected with a push plate, the push plate is connected with the extension plate in a sliding mode, two limiting rods are connected to the side wall of the push plate, and the limiting rods extend into the limiting through holes. In the preferred embodiment, the plurality of bottom plates are conveniently limited as a whole by a limiting assembly.
Preferably, the inner wall of the slip ring is provided with two anti-rotation grooves, the anti-rotation grooves are matched with and contact with anti-rotation bosses, the anti-rotation bosses are arranged on the side wall of the base shaft, the side wall of the slip ring is contacted with a spring, and the spring is sleeved on the outer wall of the base shaft. In the preferred embodiment, the slip ring and the base shaft are prevented from rotating relative to each other by the engagement of the anti-rotation boss with the anti-rotation groove.
Preferably, the brake assembly includes a brake lever threadably coupled to the slip ring side wall and extending into the interior. In the preferred embodiment, the slip ring is conveniently positioned and fixed by a brake assembly.
Preferably, the lifting assembly comprises a first square sleeve and a threaded rod, the bottom of the first square sleeve is connected with the side wall of the sliding ring, the inner wall of the first square sleeve is sleeved with a second square sleeve, the threaded rod is in threaded connection with the second square sleeve and extends to the bottom of the inner wall of the lower square sleeve to be connected with the bottom of the inner wall of the first square sleeve in a rotating mode, and the side wall of the second square sleeve is connected with the tool pressing frame. In the preferred embodiment, the lifting of the tool holder is achieved through the lifting assembly, so that the sandwich structure to be measured is clamped conveniently.
Preferably, a sliding groove is arranged at the bottom of the cutter pressing frame and is in sliding connection with a pressing block, a base plate is arranged at the bottom of the pressing block, and the bottom of the base plate is connected with the side wall of the sliding ring. In the preferred embodiment, the sliding mounting of the different compacts is facilitated by a hold down carriage bottom chute.
Preferably, the displacement assembly comprises a telescopic hydraulic cylinder, the side wall of the telescopic hydraulic cylinder is connected with the upper surface of the base plate, and the output end of the telescopic hydraulic cylinder is connected with the side wall of the positioning block. In the preferred embodiment, the driving force is provided for movement of the positioning block by the displacement assembly.
The invention also provides a testing method of the testing tool for the bending mechanical property of the sandwich structure, wherein the testing tool for the bending mechanical property of the sandwich structure is the testing tool for the bending mechanical property of the sandwich structure, and the method comprises the following steps:
step one: clamping, namely placing the sandwich structure to be measured on a bending plate, pulling out a plurality of sliding rings, screwing a brake rod when the sliding rings slide to the side wall of the first square sleeve to contact the side wall of the sandwich structure to be measured, selecting a proper pressing block, such as a semicircular head, sliding the pressing block to be connected with a sliding chute, rotating a threaded rod, driving the second square sleeve to move downwards by the threaded rod, and moving to the pressing block to press and fix the sandwich structure to be measured on a backing plate, so that clamping can be completed;
step two: positioning, namely selecting a bending measurement position according to requirements, namely selecting the middle part of a bending plate as a bending position, starting the pneumatic cylinders at the left side and the right side at the moment, driving the push plate and the limiting rod to move by the output ends of the pneumatic cylinders, sliding the limiting rod in the limiting through hole, limiting the bottom plate at the left end, the adjacent bottom plate and the bottom plate at the right end and the adjacent bottom plate into a whole, taking a base shaft in the middle of the bending plate as a base shaft to be rotated, and driving the positioning blocks to move outwards by the telescopic hydraulic cylinders at the two ends of the base shaft except the base shaft to be rotated, so that positioning can be completed;
step three: the bending, open two drive pneumatic cylinders, drive pneumatic cylinder output drives the actuating lever and slides in the annular frame, and the annular frame drives the curved board both ends and waits to rotate the basal shaft, and the curved board is crooked to sandwich structure, but after measuring, reset and can carry out the location step again so that carry out the bending measurement of different positions, if select right side lateral axle as waiting to bend the position, the accessible gag lever post is spacing into whole with three bottom plates in the left side, can right side lateral axle as waiting to rotate the basal shaft this moment.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, the bending plate can be bent at different positions through the structural design that the adjacent bottom plates are hinged on the corresponding base shafts, the plurality of bottom plates are conveniently limited into a whole through the limiting assembly, and the bending plate and the limiting assembly are matched to bend different positions of the sandwich structure to be measured;
the driving component provides driving force for the rotation of the bottom plate, the sandwich structure to be measured is conveniently and stably fixed on the bending plate through the fixing device, and the slip ring and the base shaft can be prevented from rotating relatively through the cooperation of the anti-rotation boss and the anti-rotation groove in the fixing device;
the sliding ring is convenient to fix through the brake component, the tool pressing frame is lifted through the lifting component, the sandwich structure to be measured is convenient to clamp and fix between the pressing block and the backing plate, and different pressing blocks are convenient to slidingly install through the sliding grooves at the bottom of the tool pressing frame.
Additional features and advantages of the disclosure will be set forth in the description which follows, or in part will be obvious from the description, or may be learned by practice of the techniques of the disclosure.
In order to make the above objects, features and advantages of the present invention more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
FIG. 1 is an axial side view of an overall structure of a test fixture for bending mechanical properties of a sandwich structure;
FIG. 2 is a structural axial view of a fixing device in a test fixture for bending mechanical properties of a sandwich structure according to the present invention;
FIG. 3 is a structural axial view of a driving assembly in a test fixture for bending mechanical properties of a sandwich structure according to the present invention;
FIG. 4 is an axial side view of a curved plate structure in a tool for testing the flexural mechanical properties of a sandwich structure according to the present invention;
FIG. 5 is a side view of the structure of the driving assembly in the test fixture for bending mechanical properties of the sandwich structure according to the present invention;
fig. 6 is a side view of the whole structure of the proposed test fixture for bending mechanical properties of a sandwich structure.
Main symbol description:
Detailed Description
In order that the invention may be readily understood, a more complete description of the invention will be rendered by reference to the appended drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1 to 6, the present invention provides a testing tool for bending mechanical properties of a sandwich structure, which comprises a bending device 1, wherein the bending device 1 comprises a base plate 11, a bending plate 12, a driving assembly 13 and a plurality of base shafts 14.
The driving components 13 are arranged at the bottom of the base plate 11, and the execution ends of the two driving components 13 penetrate through the base plate 11 and are connected with the bottom of the bending plate 12. The driving assembly 13 includes a driving hydraulic cylinder 131 and an annular frame 132, and the annular frame 132 is connected to one end of the bottom of the bending plate 12. The driving hydraulic cylinder 131 is fixed at the bottom of the base plate 11, the output end of the driving hydraulic cylinder 131 penetrates through the base plate 11 and extends to the upper portion to be connected with the driving rod 133, and the driving rod 133 is slidably connected with the inner wall of the annular frame 132.
In this embodiment, two driving hydraulic cylinders 131 are opened, and the output end of the driving hydraulic cylinder 131 drives a driving rod 133 to slide in the annular frame 132. The annular frame 132 drives the two ends of the bending plate 12 to rotate around the base shaft 14 to be rotated, and the bending plate 12 bends the sandwich structure.
Limiting assemblies 15 are arranged on two sides of the bending plate 12, and a plurality of base shafts 14 penetrate through the bending plate 12. The bottoms of the two sliding rails 27 are fixed on the base plate 11, the two sliding rails 27 are connected with the positioning block 25 in a sliding manner, and the side wall of the positioning block 25 is clamped with one end of the base shaft 14. The positioning block 25 is provided with a displacement assembly 26 on one side, the bending plate 12 includes four bottom plates 121, two adjacent bottom plates 121 are hinged on the corresponding base shaft 14, and each bottom plate 121 and the base shaft 14 are provided with two limiting through holes 1211.
The limiting assembly 15 comprises an extension plate 151, and two pneumatic cylinders 152 are connected to the bottom of the extension plate 151. The output ends of the two pneumatic cylinders 152 are connected with a push plate 153, and the push plate 153 is slidably connected with the extension plate 151. The side wall of the push plate 153 is connected with two limiting rods 154, and the limiting rods 154 extend into the limiting through holes 1211.
The brake assembly 22 includes a brake lever 221, and the brake lever 221 is screwed to the side wall of the slip ring 21 and extends to the inside. The displacement assembly 26 comprises a telescopic hydraulic cylinder 261, the side wall of the telescopic hydraulic cylinder 261 is connected with the upper surface of the base plate 11, and the output end of the telescopic hydraulic cylinder 261 is connected with the side wall of the positioning block 25.
In the present embodiment, the bending measurement position may be selected as needed, for example, the middle portion of the bending plate 12 is selected as the bending portion, and the left and right pneumatic cylinders 152 are opened. The output end of the pneumatic cylinder 152 drives the push plate 153 and the limiting rod 154 to move, the limiting rod 154 slides in the limiting through hole 1211, after the bottom plate 121 at the left end and the adjacent bottom plate 121 and the bottom plate 121 at the right end and the adjacent bottom plate 121 are limited into a whole, the base shaft 14 in the middle of the bending plate 12 is used as the base shaft 14 to be rotated, and the telescopic hydraulic cylinders 261 at the two ends of the base shaft 14 except the base shaft 14 to be rotated drive the positioning blocks 25 to move outwards, so that the position selection can be completed.
In this embodiment, a fixing device 2 is provided at both ends of each of the base shafts 14. The fixing device 2 comprises a slip ring 21 and two sliding rails 27, and the slip ring 21 is sleeved on the side wall of the base shaft 14. The bottom of the slip ring 21 is provided with a brake assembly 22, and the top of the slip ring 21 is provided with a tool pressing frame 23. A lifting assembly 24 is arranged between the slip ring 21 and the knife pressing frame 23, and two anti-rotation grooves 211 are formed in the inner wall of the slip ring 21.
In addition, the anti-rotation grooves 211 are in matched contact with anti-rotation bosses 212, and the anti-rotation bosses 212 are arranged on the side wall of the base shaft 14. The side wall of the slip ring 21 contacts a spring 213, and the spring 213 is sleeved on the outer wall of the base shaft 14. The lifting assembly 24 comprises a first square sleeve 241 and a threaded rod 242, and the bottom of the first square sleeve 241 is connected with the side wall of the slip ring 21.
The inner wall of the first square sleeve 241 is sleeved with a second square sleeve 243, and the threaded rod 242 is in threaded connection with the second square sleeve 243 and extends to the bottom of the inner wall of the first square sleeve 241 for rotation connection. The side wall of the second square sleeve 243 is connected with the tool pressing frame 23, a sliding groove 231 is formed in the bottom of the tool pressing frame 23, the sliding groove 231 is connected with a pressing block 232 in a sliding mode, a base plate 233 is arranged at the bottom of the pressing block 232, and the bottom of the base plate 233 is connected with the side wall of the sliding ring 21.
In this embodiment, the sandwich structure to be measured is placed on the bending plate 12, and the slip rings 21 are pulled outward. The slip ring 21 is slid until the side wall of the first square sleeve 241 contacts the side wall of the sandwich structure to be measured, the brake rod 221 is screwed, and a suitable press block 232, such as a head, is selected to be semicircular. The pressing block 232 is then slidingly connected to the sliding groove 231, and the threaded rod 242 is rotated. The threaded rod 242 drives the second square sleeve 243 to move downwards, and the second square sleeve 243 moves to the pressing block 232 to press and fix the sandwich structure to be measured on the backing plate 233.
According to the embodiment, the test method of the test tool for bending mechanical properties of the sandwich structure is further provided, and comprises the following steps:
step one: clamping, namely placing the sandwich structure to be measured on a bending plate, pulling out a plurality of sliding rings, screwing a brake rod when the sliding rings slide to the side wall of the first square sleeve to contact the side wall of the sandwich structure to be measured, selecting a proper pressing block, such as a semicircular head, sliding the pressing block to be connected with a sliding chute, rotating a threaded rod, driving the second square sleeve to move downwards by the threaded rod, and moving to the pressing block to press and fix the sandwich structure to be measured on a backing plate, so that clamping can be completed;
step two: positioning, namely selecting a bending measurement position according to requirements, namely selecting the middle part of a bending plate as a bending position, starting the pneumatic cylinders at the left side and the right side at the moment, driving the push plate and the limiting rod to move by the output ends of the pneumatic cylinders, and after the limiting rod slides in the limiting through hole and limits the left end bottom plate, the adjacent bottom plate and the right end bottom plate to form a whole with the adjacent bottom plate, a base shaft in the middle of the bending plate is used as a base shaft to be rotated, and the telescopic hydraulic cylinders at the two ends of the base shaft except the base shaft to be rotated drive the positioning block to move outwards, so that positioning can be completed;
step three: the bending, open two drive pneumatic cylinders, drive pneumatic cylinder output drives the actuating lever and slides in the annular frame, and the annular frame drives the curved board both ends and waits to rotate the basal shaft, and the curved board is crooked to sandwich structure, but after measuring, reset and can carry out the location step again so that carry out the bending measurement of different positions, if select right side lateral axle as waiting to bend the position, the accessible gag lever post is spacing into whole with three bottom plates in the left side, can right side lateral axle as waiting to rotate the basal shaft this moment.
The specific flow of the invention is as follows:
placing the sandwich structure to be measured on the bending plate 12, pulling out a plurality of sliding rings 21, screwing the brake rod 221 when the sliding rings 21 slide to the side wall of the first square sleeve 241 to contact the side wall of the sandwich structure to be measured, selecting a proper pressing block 232 such as a semicircular head, sliding the pressing block 232 to be connected with the sliding chute 231, rotating the threaded rod 242, and driving the second square sleeve 243 to move downwards by the threaded rod 242 until the pressing block 232 presses and fixes the sandwich structure to be measured on the backing plate 233;
selecting a bending measurement position according to requirements, for example, selecting the middle part of the bending plate 12 as a bending position, opening the pneumatic cylinders 152 at the left side and the right side at the moment, driving the push plate 153 and the limiting rod 154 to move by the output end of the pneumatic cylinders 152, and after the limiting rod 154 slides in the limiting through hole 1211 and limits the left end bottom plate 121, the adjacent bottom plate 121 and the right end bottom plate 121 to form a whole together with the adjacent bottom plate 121, the base shaft 14 in the middle of the bending plate 12 is used as the base shaft 14 to be rotated, and the telescopic hydraulic cylinders 261 at the two ends of the base shaft 14 except the base shaft 14 to be rotated drive the positioning blocks 25 to move outwards, so that position selection can be completed;
starting two driving hydraulic cylinders 131, driving the output ends of the driving hydraulic cylinders 131 to drive driving rods 133 to slide in annular frames 132, enabling the annular frames 132 to drive two ends of the bending plate 12 to rotate around the base shaft 14 to be rotated, bending the sandwich structure by the bending plate 12, resetting the sandwich structure after measurement is finished, and carrying out position selection again so as to carry out bending measurement at different positions, for example, selecting the right base shaft 14 as the position to be bent, limiting the three bottom plates 121 on the left to be integrated through limiting rods 154, and at the moment, enabling the right base shaft 14 to be used as the base shaft 14 to be rotated.
Finally, it should be noted that: the above examples are only specific embodiments of the present invention, and are not intended to limit the scope of the present invention, but it should be understood by those skilled in the art that the present invention is not limited thereto, and that the present invention is described in detail with reference to the foregoing examples: any person skilled in the art may modify or easily conceive of the technical solution described in the foregoing embodiments, or perform equivalent substitution of some of the technical features, while remaining within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention, and are intended to be included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (3)
1. The utility model provides a sandwich structure bending mechanical property's test fixture, includes bending device (1), its characterized in that, bending device (1) include base plate (11), bending plate (12), drive assembly (13) and a plurality of basic shaft (14), drive assembly (13) are located base plate (11) bottom, and two drive assembly (13) carry out the end and all run through base plate (11) and be connected with the bottom of bending plate (12), bending plate (12) both sides all are equipped with spacing subassembly (15), a plurality of basic shaft (14) all run through bending plate (12), every basic shaft (14) both ends all are equipped with fixing device (2);
the bending plate (12) comprises four bottom plates (121), two adjacent bottom plates (121) are hinged on the corresponding base shaft (14), and each bottom plate (121) and the base shaft (14) are provided with two limiting through holes (1211);
the fixing device (2) comprises a slip ring (21) and two sliding rails (27), wherein the slip ring (21) is sleeved on the side wall of a base shaft (14), a brake assembly (22) is arranged at the bottom of the slip ring (21), a tool pressing frame (23) is arranged at the top of the slip ring (21), a lifting assembly (24) is arranged between the slip ring (21) and the tool pressing frame (23), the bottoms of the two sliding rails (27) are both fixed on the base plate (11), a positioning block (25) is connected between the two sliding rails (27) in a sliding manner, the side wall of the positioning block (25) is clamped at one end of the base shaft (14), and a displacement assembly (26) is arranged at one side of the positioning block (25);
the driving assembly (13) comprises a driving hydraulic cylinder (131) and an annular frame (132), the annular frame (132) is connected with one end of the bottom of the bending plate (12), the driving hydraulic cylinder (131) is fixed at the bottom of the base plate (11), the output end of the driving hydraulic cylinder (131) penetrates through the base plate (11) and extends to the upper part to be connected with a driving rod (133), and the driving rod (133) is connected with the inner wall of the annular frame (132) in a sliding manner;
the limiting assembly (15) comprises an extending plate (151), two pneumatic cylinders (152) are connected to the bottom of the extending plate (151), pushing plates (153) are connected to the output ends of the two pneumatic cylinders (152), the pushing plates (153) are in sliding connection with the extending plate (151), two limiting rods (154) are connected to the side walls of the pushing plates (153), and the limiting rods (154) extend into limiting through holes (1211);
the brake assembly (22) comprises a brake rod (221), and the brake rod (221) is in threaded connection with the side wall of the slip ring (21) and extends into the interior;
the lifting assembly (24) comprises a first square sleeve (241) and a threaded rod (242), wherein the bottom of the first square sleeve (241) is connected with the side wall of the slip ring (21), a second square sleeve (243) is sleeved on the inner wall of the first square sleeve (241), the threaded rod (242) is in threaded connection with the second square sleeve (243) and extends to the lower part, and is in rotary connection with the bottom of the inner wall of the first square sleeve (241), and the side wall of the second square sleeve (243) is connected with a cutter pressing frame (23);
the bottom of the cutter pressing frame (23) is provided with a sliding groove (231), the sliding groove (231) is in sliding connection with a pressing block (232), the bottom of the pressing block (232) is provided with a base plate (233), and the bottom of the base plate (233) is connected with the side wall of the slip ring (21);
the displacement assembly (26) comprises a telescopic hydraulic cylinder (261), the side wall of the telescopic hydraulic cylinder (261) is connected with the upper surface of the base plate (11), and the output end of the telescopic hydraulic cylinder (261) is connected with the side wall of the positioning block (25).
2. The tool for testing the bending mechanical property of the sandwich structure according to claim 1, wherein two anti-rotation grooves (211) are formed in the inner wall of the slip ring (21), the anti-rotation grooves (211) are in matched contact with anti-rotation bosses (212), the anti-rotation bosses (212) are arranged on the side wall of the base shaft (14), the side wall of the slip ring (21) is in contact with a spring (213), and the spring (213) is in contact with the outer wall of the base shaft (14).
3. A method for testing a tool for testing bending mechanical properties of a sandwich structure, characterized in that the tool for testing bending mechanical properties of a sandwich structure is a tool for testing bending mechanical properties of a sandwich structure according to any one of claims 1 to 2, the method comprising the steps of:
step one: clamping, namely placing the sandwich structure to be measured on a bending plate, and externally pulling a plurality of sliding rings, wherein the sliding rings are screwed with a brake rod when sliding to the side wall of the first square sleeve to contact the side wall of the sandwich structure to be measured; the pressing block is in sliding connection with the sliding groove, the threaded rod is rotated, the threaded rod drives the second square sleeve to move downwards, and the second square sleeve moves to the pressing block to press and fix the sandwich structure to be measured on the backing plate, so that clamping is completed;
step two: positioning, namely selecting bending measurement positions according to requirements, starting pneumatic cylinders at the left side and the right side, driving a push plate and a limiting rod to move by the output ends of the pneumatic cylinders, sliding the limiting rod in a limiting through hole, limiting a bottom plate at the left end, a bottom plate adjacent to the bottom plate at the left end, a bottom plate at the right end and the bottom plate adjacent to the bottom plate at the right end into a whole, taking a base shaft in the middle of the bending plate as a base shaft to be rotated, and driving positioning blocks to move outwards by telescopic hydraulic cylinders at two ends of the base shaft except the base shaft to be rotated, so that positioning is completed;
step three: bending, namely starting two driving hydraulic cylinders, driving the output ends of the driving hydraulic cylinders to drive the driving rods to slide in the annular frame, and driving the two ends of the bending plate to rotate around a base shaft to be rotated by the annular frame, so that the bending plate bends the sandwich structure; after the measurement is completed, the device can be reset and the positioning step can be carried out again so as to carry out bending measurement at different positions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110188336.5A CN112986006B (en) | 2021-02-08 | 2021-02-08 | Test tool and test method for bending mechanical property of sandwich structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110188336.5A CN112986006B (en) | 2021-02-08 | 2021-02-08 | Test tool and test method for bending mechanical property of sandwich structure |
Publications (2)
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