CN110779814A - Adhesive material shearing performance test device - Google Patents
Adhesive material shearing performance test device Download PDFInfo
- Publication number
- CN110779814A CN110779814A CN201911073371.1A CN201911073371A CN110779814A CN 110779814 A CN110779814 A CN 110779814A CN 201911073371 A CN201911073371 A CN 201911073371A CN 110779814 A CN110779814 A CN 110779814A
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- plate
- adhesive material
- planking
- nut
- middle plate
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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
- G01N3/24—Investigating strength properties of solid materials by application of mechanical stress by applying steady shearing 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
Abstract
The invention discloses a bonding material shearing performance test device which comprises two outer plates, a middle plate, a connecting piece, a bearing platform, a bearing head, an outer plate pressing strip and a middle plate pressing strip, wherein the two outer plates are arranged in parallel, the lower parts of the outer plates are fixedly connected through the connecting piece, the opposite inner sides of the two outer plates are provided with first grooves which are opposite in position and open at the upper parts, the two side surfaces of the middle plate are respectively provided with second grooves with open at the lower parts, a space for clamping a sample is formed between the first grooves and the second grooves, the middle plate pressing strip is detachably fixed at the bottom of the middle plate, the middle plate and the middle plate pressing strip are clamped between the two outer plates together, the outer plate pressing strip is detachably fixed at the upper parts of the outer plates, the bearing platform is fixed on. The test device can eliminate the friction resistance of the device, so that the test result is more accurate, the test piece is only subjected to shearing force, and the force applied to the test piece in the thickness direction is eliminated.
Description
Technical Field
The invention relates to the technical field of shear performance test devices, in particular to a shear performance test device for an adhesive material.
Background
With the increasing requirements of people on the appearance of buildings, curtain wall glass is gradually widely used. Curtain wall glass in the building industry is generally laminated glass, hollow glass and hollow laminated glass which are formed by bonding toughened glass sheets through bonding materials.
The common multilayer glass adhesive material is silicone structural adhesive and PVB intermediate film. The silicone structural adhesive is a silicone rubber with wide application range, durability, high modulus and high elasticity. The PVB intermediate film is a high-molecular film with high shear modulus and high bonding strength, is used for an intermediate layer of laminated glass, and is used for bonding two single glass sheets of the laminated glass.
The bonding mode of the hollow glass is to bond two single glass sheets by a parting strip system. The parting strip system comprises parting strips, butyl rubber and silicone structural adhesive. The material of the parting bead is mostly aluminum, which plays a skeleton role in the system and bears the pressure between the two glass sheets of the hollow glass. The butyl rubber has good sealing performance, is heat-resistant and ageing-resistant, and mainly plays a role in blocking external water vapor in the parting strip system. The silicone structural adhesive is an excellent viscoelastic bonding material, and has high tensile strength, bonding strength and shearing strength and certain rigidity. In the spacer system, the silicone structural adhesive takes over the peripheral sealing of the spacer system and bonds the entire system together.
For laminated glass, two pieces of toughened glass are used to clamp the PVB interlayer film at a relatively high temperature and apply pressure, and the pressure is maintained until the PVB interlayer film is cooled, so that bonding is achieved. The performance of the PVB intermediate film has a great influence on the bonding effect of the laminated glass.
For the hollow laminated glass, a piece of laminated glass and a piece of toughened glass are connected through a parting bead system, and in order to research the shearing performance of a bonding system of the hollow glass, the laminated glass and the hollow laminated glass, a corresponding test piece is firstly manufactured, the test piece is placed in a testing device and fixed, and then the testing device is placed in a loading device for loading, so that test data are obtained. When loading, the test piece is subjected to shearing force, and relative displacement occurs between the two glass sheets. The loading force and its corresponding relative displacement are recorded and the shear properties of the adhesive material can be obtained by trimming.
Some of the test devices for testing shear performance also disclosed in the prior art, but tend to exhibit internal friction between the connecting rod and the upper clamp when loaded; a gap may exist between the glass sheet of the test piece and the groove position of the clamp, and the test piece may loosen during loading; the width can receive the restriction to the structure of test piece is glued, and the structure of test piece is glued thickness and is received the restriction, can't change the structure adhesive layer thickness of test piece, and the test piece probably receives the pressure of thickness direction when the loading, makes the atress environment of test piece change scheduling problem. For example, the Chinese patent "a structural sealant shear test fixture, application number: 201810268639.6', when the device is loaded, internal friction force exists between the connecting rod and the upper clamp, a certain gap possibly exists between the glass sheet of the test piece and the slot position of the clamp, the test piece possibly loosens during loading, and the structural adhesive width of the test piece is limited. It is therefore desirable to find a test device that solves the above problems.
Disclosure of Invention
The invention aims to provide a device for testing the shearing performance of an adhesive material, which can eliminate the frictional resistance of the device, ensure that the test result is more accurate, ensure that a test piece only bears the shearing force, and eliminate the force of the test piece in the thickness direction.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a bonding material shearing performance test device, includes planking, medium plate, connecting piece, load-bearing platform, bears head, planking layering and medium plate layering, the planking has two parallel arrangement and the lower part to pass through the connecting piece to be connected fixedly, two the relative inboard of planking is equipped with the relative and upper portion open-ended first recess in position, be equipped with lower part open-ended second recess on the both sides face of medium plate respectively, the space that forms a centre gripping sample between first recess and the second recess is used for the centre gripping sample, medium plate layering detachably fixes in the medium plate bottom, and medium plate layering are then centre gripping together between two planking, planking layering detachably fixes the upper portion at the planking, load-bearing platform fixes on the medium plate, it fixes on load-bearing platform to bear.
Furthermore, through holes are formed in two corners of the lower portion of the two outer plates, and the connecting pieces penetrate through the through holes to fix the outer plates in parallel.
Further, the connecting piece includes connecting screw, interior nut, outer nut, interior nut cushion and outer nut cushion, connecting screw passes the perforation connection of planking in proper order, interior nut and interior nut cushion all run through on connecting screw and lie in between two planks, outer nut and outer nut cushion are located connecting screw's both ends, the planking extrudees interior nut cushion and outer nut cushion respectively through interior nut and outer nut and presss from both sides tightly fixedly, connecting screw and interior nut, outer nut adaptation.
Furthermore, first screw holes are formed in two sides of the bottom of the middle plate, and the middle plate pressing strip is matched and fixed with the first screw holes through screws.
Further, the first screw holes are positioned at two sides of the first groove, and the first groove is formed by cutting a part of the middle plate upwards from the bottom of the middle plate to form a groove with a downward opening.
Furthermore, the outer plate pressing strip is a square strip and is fixed by arranging second screw holes on two sides of the upper end of the outer plate and matching screws.
Further, the second screw holes are located on both sides of a second groove formed by cutting down a middle portion of the outer plate from an upper end of the outer plate to a middle lower portion of the outer plate.
Furthermore, the bearing platform is a square plate and is welded and fixed above the middle plate, and the bearing platform is positioned in the middle of the bearing platform.
Furthermore, the bearing head is cylindrical and is welded and fixed in the center above the bearing platform, and the upper end of the bearing head is polished into a hemispherical shape.
Further, the diameter of the carrier head is 20 mm.
The beneficial effects of the invention through using the technical scheme are as follows:
(1) the two test pieces can be clamped at one time for testing, so that accidental errors during testing can be reduced, the testing efficiency is accelerated, and the two test pieces are symmetrically installed and bear equal shearing force;
(2) the middle plate of the device only contacts with the test piece when the test piece is loaded, but does not contact with the outer plate, the device is not subjected to frictional resistance when the test piece is loaded, the whole device has no frictional resistance, the influence of the frictional force can be eliminated, and the accuracy of the test result is improved;
(3) the device is suitable for test pieces with different thicknesses and specifications. The test of common structural adhesive can be carried out, and the longitudinal and transverse shear tests of a hollow glass parting strip system, a shear test of a PVB film of laminated glass, a shear test of a hollow laminated glass parting strip system and a shear test of the PVB film can also be carried out;
(4) in the test device, the test piece is not under the action of pressure or tension in the thickness direction of the bonding material and only under the action of shearing force parallel to the direction of the glass sheet in the test process, so that the test piece is prevented from deforming in the thickness direction, the test is more accurate, and the precision reaches 0.5%;
(5) the test device is suitable for test pieces with different thicknesses and different specifications, is suitable for loading equipment with various specifications, and has strong universality;
(6) the test piece is not under the action of pressure or tension on the bonding material or the cavity spacing system, and is only under the action of shearing force parallel to the direction of the glass sheets, so that the material of the test piece is sheared and damaged due to overlarge relative displacement of the two glass sheets.
Drawings
FIG. 1 is a schematic view of the structure of an experimental apparatus of the present invention;
FIG. 2 is a schematic view showing a part of the arrangement of the experimental apparatus according to the present invention;
in the drawing, an outer plate 1, a middle plate 2, a connecting piece 3, a connecting screw rod 31, an inner nut 32, an outer nut 33, an inner nut cushion block 34, an outer nut cushion block 35, a bearing platform 4, a bearing head 5, an outer plate pressing strip 6, a middle plate pressing strip 7, a first groove 8, a second groove 9, a test piece 10, silicone structural adhesive 13, a spacer strip 14, butyl adhesive 15, a glass sheet 16 and a PVB intermediate film 17.
Detailed Description
The present invention will be described in further detail in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be noted, however, that these embodiments are provided merely to provide a more thorough and complete understanding of the present invention, and that many of the details set forth in the specification are merely set forth to provide a thorough understanding of one or more aspects of the present invention, which may be practiced without these specific details.
As shown in fig. 1 and fig. 2, a shearing performance testing device for bonding materials comprises an outer plate 1, a middle plate 2, a connecting piece 3, a bearing platform 4, a bearing head 5, an outer plate bead 6 and a middle plate bead 7, wherein the outer plate 1 is provided with two parallel plates, the lower parts of the two plates are connected and fixed through the connecting piece 3, the inner sides of the two outer plates 1 are provided with first grooves 8 which are opposite in position and open at the upper parts, two side surfaces of the middle plate 2 are respectively provided with second grooves 9 which are open at the lower parts, a space for clamping a sample is formed between the first grooves 8 and the second grooves 9, the sample can simulate the shearing working condition of structural adhesive and the stress working condition of a partition strip system of hollow glass and hollow laminated glass, the middle plate bead 7 is detachably fixed at the bottom of the middle plate 2, the middle plate 2 and the middle plate bead 7 are clamped between the two outer plates together, the outer plate bead, the bearing platform 4 is fixed on the middle plate 2, and the bearing head 5 is fixed on the bearing platform 4.
Two corners of the lower parts of the two outer plates 1 are provided with through holes, and the outer plates 1 are fixed in parallel by the connecting pieces 3 through the through holes; connecting piece 3 includes connecting screw 31, interior nut 32, outer nut 33, interior nut cushion 34 and outer nut cushion 35, connecting screw 31 passes the perforation connection of planking 1 in proper order, interior nut 32 and interior nut cushion 34 all run through and lie in between two planking 1 on connecting screw 31, outer nut 33 and outer nut cushion 35 are located connecting screw 31's both ends, planking 1 extrudes interior nut cushion 34 and outer nut cushion 35 respectively through interior nut 32 and outer nut 33 and presss from both sides fixedly, connecting screw 31 and interior nut 32, outer nut 33 adaptation.
Two sides of the bottom of the middle plate 2 are provided with first screw holes, and the middle plate pressing strip 7 is matched and fixed with the first screw holes through screws; the first screw holes are positioned at two sides of a first groove 8, and the first groove 8 is formed by cutting a part of the middle of the bottom of the middle plate 2 upwards to form a groove which is opened downwards.
The outer plate pressing strip 6 is a square strip and is fixed by arranging second screw holes on two sides of the upper end of the outer plate 1 and matching screws; the second screw holes are located on both sides of a second groove 9, and the second groove 9 is formed by cutting down the middle portion of the outer plate from the upper end to the middle-lower portion of the outer plate.
The bearing platform 4 is a square plate and is welded and fixed above the middle plate, and the bearing platform 4 is positioned in the middle of the bearing platform; the bearing head 5 is cylindrical and is welded and fixed at the center above the bearing platform 4, and the upper end of the bearing head 5 is polished into a hemispherical shape; the diameter of the carrier head 5 is 20 mm.
When the test device is manufactured, firstly, a thick steel plate with the thickness of 20mm is used for cutting two outer plates 1 with the size of 150 multiplied by 140 multiplied by 20mm, an iron plate with the size of 150 multiplied by 90 multiplied by 20mm and a bearing platform 7 with the size of 60 multiplied by 10 multiplied by 20mm, and two outer plate pressing strips 10 with the size of 150 multiplied by 20 multiplied by 10 and a middle plate pressing strip 11 with the same size are cut by using the steel plate with the thickness of 10 mm; cutting 20mm of round steel with d being 20mm, and polishing one end into a hemisphere shape; the bearing platform 7 and the bearing head 8 are welded on an iron plate with the size of 150 multiplied by 90 multiplied by 20mm in sequence to form the middle plate 2.
A hole along the thickness direction is drilled at two lower corner points of the two outer plates, and a clamping groove with the size of 80X 8mm is milled downwards at the inner top edge of each outer plate to form a second groove. Clamping grooves with the same size are milled on two sides of the middle plate to form first grooves. Meanwhile, holes are drilled on the top surfaces of the two outer plates and the bottom surface of the middle plate near the two short sides, and then M8 bolts are used for fixing the middle plate pressing strip in a matching mode. For the outer plate pressing strip and the middle plate pressing strip, a hole with the diameter of 9mm is drilled at the corresponding position facing the threads of the outer plate and the middle plate, so that the outer plate bolt and the middle plate bolt can pass through smoothly.
Further, the dimensions of the other components of the device: the connecting screw is a 150mm M10 screw; the inner nut cushion block and the outer nut cushion block are square cushion blocks with openings in the middle and the diameters of 30 multiplied by 2 mm; m10 nuts are adopted as the inner nuts and the outer nuts, and M8 bolts are adopted as the outer plate bolts and the middle plate bolts.
In the experiment using the test apparatus of the present invention, a test piece was first produced. The composition of test piece 10 includes silicone structural adhesive 13, spacer bars 14, butyl rubber 15, glass sheet 16, and PVB interlayer film 17. For the parting bead test piece, adhering butyl adhesive tapes on the two parting beads, bonding one sides of the two parting beads on one glass sheet according to the arrangement direction of the parting beads, covering the other glass sheet on the other side of the parting beads, then tightly pressing the two glass sheets, and finally coating silicone structural adhesive on the outer sides of the parting beads. As for the hollow sandwich test piece, firstly, a sandwich glass test piece is manufactured, then the division bar adhered with the butyl adhesive tape is bonded on one surface of the sandwich glass, then the silicone adhesive is applied to the outer side of the division bar, and finally, a piece of toughened glass is covered and pressed tightly. All the test pieces were maintained in a ventilated environment at normal temperature (25 ℃) for 28 days, and then the test was carried out.
And clamping the test piece by using the device after the test piece is manufactured and maintained. Firstly, the inner nut and the inner nut cushion block are sleeved in two directions of two connecting screw rods, then, two sides of the connecting screw rods are sleeved in the outer plate 1, finally, the outer nut cushion block and the outer nut are sleeved on two ends of the connecting screw rods in sequence, and then, the inner nut and the outer nut are adjusted according to the approximate distance between the middle plate and the outer plate after the test piece is placed in, so that the position of the outer plate is adjusted.
And respectively inserting the two test pieces into the first grooves on the two sides of the middle plate, pressing a middle plate pressing strip on the bottom of the middle plate 2, and fixing the middle plate pressing strip 7 by using a middle plate bolt, so that the test pieces are fixed on the middle plate.
And inserting the middle plate with the test piece into the middle of the two outer plates, and inserting the outer glass sheets of the two test pieces into the second grooves of the outer plates in a manner of facing the outer glass sheets. Then, the two outer plate pressing strips are pressed on the two outer plates respectively, then the outer plate bolts are screwed, and the clamp can clamp the test piece at the moment.
After the device clamps the test piece, the test piece is placed on loading equipment for loading. The loading device is used for pushing the bearing head 5, and then shearing force parallel to the direction of the glass sheet can be applied to the test piece.
The test accuracy of the device depends on the accuracy of a measuring instrument. During loading, the device is also matched with a length measuring instrument such as a dial indicator or a dial indicator and a force measuring instrument to measure the relative displacement between the two glass sheets of the test piece and the loading force of the loading equipment.
The test device can clamp two test pieces at one time to carry out the test, so that accidental errors during the test can be reduced, and the test efficiency is accelerated. The two test pieces are symmetrically arranged and bear equal shearing force, and the device is suitable for test pieces with different thicknesses and specifications. The shear test of the hollow glass parting strip system in the longitudinal direction and the transverse direction, the shear test of a PVB film of laminated glass, the shear test of the hollow laminated glass parting strip system and the shear test of the PVB film can be carried out.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be construed as the protection scope of the present invention.
Claims (10)
1. The utility model provides an adhesive material shear behavior test device which characterized in that: including planking, medium plate, connecting piece, load-bearing platform, bear head, planking layering and medium plate layering, the planking has two, and parallel arrangement and the lower part of planking pass through the connecting piece to be connected fixedly two the relative inboard of planking is equipped with the relative and upper portion open-ended first recess in position, be equipped with two lower part open-ended second recesses on the both sides face of medium plate respectively, the space that forms a centre gripping sample between first recess and the second recess is used for the centre gripping sample, medium plate layering detachably fixes in the medium plate bottom, and centre gripping is then together between two planks to medium plate layering detachably, the upper portion at the planking is fixed to planking layering detachably, load-bearing platform fixes on the medium plate, bear the head and fix on load-bearing platform.
2. The apparatus for testing shear properties of an adhesive material according to claim 1, wherein: two corners of the lower parts of the two outer plates are provided with through holes, and the connecting pieces penetrate through the through holes to fix the outer plates in parallel.
3. The apparatus for testing shear properties of an adhesive material according to claim 2, wherein: the connecting piece includes connecting screw, interior nut, outer nut, interior nut cushion and outer nut cushion, connecting screw passes the perforation connection of planking in proper order, interior nut and interior nut cushion all run through and lie in between two planks on connecting screw, outer nut and outer nut cushion are located connecting screw's both ends, the planking extrudees interior nut cushion and outer nut cushion respectively through interior nut and outer nut and presss from both sides tightly fixedly, connecting screw and interior nut, outer nut adaptation.
4. The apparatus for testing shear properties of an adhesive material according to claim 1, wherein: first screw holes are formed in two sides of the bottom of the middle plate, and the middle plate pressing strip is matched and fixed with the first screw holes through screws.
5. The apparatus for testing shear properties of adhesive material according to claim 4, wherein: the first screw holes are positioned at two sides of a first groove, and the first groove is formed by cutting a part of the middle part of the bottom of the middle plate upwards to form a groove with a downward opening.
6. The apparatus for testing shear properties of an adhesive material according to claim 1, wherein: the outer plate pressing strip is a square strip and is fixed by arranging second screw holes on two sides of the upper end of the outer plate and matching screws.
7. The apparatus for testing shear properties of adhesive material according to claim 6, wherein: the second screw holes are positioned at two sides of a second groove, and the second groove is formed by downwards cutting the middle part of the outer plate from the upper end of the outer plate to the middle lower part of the outer plate.
8. The apparatus for testing shear properties of an adhesive material according to claim 1, wherein: the bearing platform is a square plate and is welded and fixed above the middle plate, and the bearing platform is positioned in the middle of the bearing platform.
9. The apparatus for testing shear properties of adhesive material according to claim 8, wherein: the bearing head is cylindrical and is welded and fixed in the center above the bearing platform, and the upper end of the bearing head is polished into a hemispherical shape.
10. The apparatus for testing shear properties of adhesive material according to claim 9, wherein: the diameter of the carrier head is 20 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911073371.1A CN110779814A (en) | 2019-11-06 | 2019-11-06 | Adhesive material shearing performance test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911073371.1A CN110779814A (en) | 2019-11-06 | 2019-11-06 | Adhesive material shearing performance test device |
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| Publication Number | Publication Date |
|---|---|
| CN110779814A true CN110779814A (en) | 2020-02-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911073371.1A Pending CN110779814A (en) | 2019-11-06 | 2019-11-06 | Adhesive material shearing performance test device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113176152A (en) * | 2021-03-22 | 2021-07-27 | 西安理工大学 | Compression shear test device and method for testing dynamic shear performance of elastic-plastic material |
-
2019
- 2019-11-06 CN CN201911073371.1A patent/CN110779814A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113176152A (en) * | 2021-03-22 | 2021-07-27 | 西安理工大学 | Compression shear test device and method for testing dynamic shear performance of elastic-plastic material |
| CN113176152B (en) * | 2021-03-22 | 2024-03-01 | 西安理工大学 | Compression shear test device and method for testing dynamic shear performance of elastoplastic material |
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