CN205679521U - For testing the pedestal of steel plate and glass adhesive strength - Google Patents

Abstract

The utility model discloses a pedestal for testing the adhesive strength of a steel plate and glass, comprising a bonding steel plate, a displacement gauge, a base, a clamping mechanism and two bonded glass test pieces, the bonding steel plate is vertically arranged above the base, The displacement gauge is mounted on the bonded steel plate. The two bonded glass specimens are symmetrically distributed on the left and right sides of the bonded steel plate and are fixedly connected to the bonded steel plate by structural glue. The clamping mechanism includes an L-shaped positioning plate. The two rectangular panels of the L-shaped positioning plate are respectively a first rectangular panel vertically arranged horizontally and a second rectangular panel vertically arranged. The first rectangular panel is fixed on the base. An L-shaped positioning plate is provided on the front and rear sides of each bonded glass specimen, and the bonded glass specimen is clamped and positioned by two L-shaped positioning plates distributed on its front and rear sides. When the utility model is applied, it is convenient for accurately simulating the shear force working condition of the bonding interface between the glass and the steel plate in the actual project, and furthermore, the test accuracy of the bonding shear strength of the structural adhesive interface can be improved.

Description

Bench for testing the strength of steel plate and glass glue

technical field

The utility model relates to the field of material mechanical performance testing, in particular to a pedestal for testing the strength of steel plate and glass glue.

Background technique

At present, in the application process of glass, it often involves bonding glass and steel plate as a whole. Among them, the glass used for bonding is usually made of ordinary float glass, coated glass, laminated glass, insulating glass, and composite structural glass. A sort of. Because the structural adhesive itself has a good bearing capacity, it also has properties such as aging resistance, fatigue resistance, and corrosion resistance. The main connection method of glass structure.

The bonding of glass and steel plates usually needs to be able to effectively resist the comprehensive effects of wind load, self-weight load, thermal expansion and contraction, earthquakes, etc. for a long time. The bonding performance between structural adhesives and steel plates is extremely high. In some structures, the connection between the glass and the steel plate is the contact between the glass end face and the main side of the steel plate. The interface structural adhesive not only bears the pressure, but also bears the shear force of the glass and the steel plate at the interface bonding, so accurate testing and evaluation The interfacial bond shear strength of structural adhesives is crucial for structural design and safety and reliability evaluation.

At present, there are mainly international standards such as ISO 9664 and ISO 4587 for testing the tensile and shear fatigue properties of adhesives and structural adhesives. The thickness of the adhesive layer is 0.2mm. When this method is used for the interface shear performance test of the structural adhesive, there are the following problems: (1) The thickness of the adhesive layer is relatively thin, and the thickness of the structural adhesive must be as close as possible during the strength test The thickness of the glue layer in actual engineering; (2) The samples are bonded by superimposition. When the bonding method of glass and steel plate in the actual structure is the bonding of the glass end surface and the main side of the steel plate, it cannot be accurately simulated. ; (3) Glass is a brittle material with low tensile strength, and it is difficult to withstand large tensile loads; (4) Only a specific bonding length is used, and multiple bonding lengths are not tested in the test device or test process lower bond strength. Additionally, when using traditional fixtures to position the glass during shear testing, the glass is prone to wobble, causing non-shear failure, which affects test accuracy.

Utility model content

The purpose of the utility model is to overcome the deficiencies of the prior art, and provide a pedestal for testing the strength of steel plate and glass glue, which can make the thickness of the structural glue and the actual working conditions of the project when it is used for testing the shear strength of the interface of the structural glue. Consistent, can fix the bonded glass specimen stably, and can test and measure the bonding length with multiple steps. In this way, the utility model is convenient for accurately simulating the shear force working condition of the bonding interface between the glass and the steel plate in an actual project, thereby improving the test accuracy.

The utility model solves the above problems mainly through the following technical schemes: a pedestal for testing the strength of the steel plate and glass glue, including a bonded steel plate, a bonded glass test piece, a displacement meter, a base and a clamping mechanism. The steel plate is vertically arranged above the base, and the displacement gauge is installed on the bonded steel plate; the bonded glass test pieces are vertically arranged on the base, and the number of bonded glass test pieces is two, and the two The bonded glass specimens are symmetrically distributed on the left and right sides of the bonded steel plate, and the two bonded glass specimens are fixedly connected to the bonded steel plate by structural glue; the clamping mechanism includes an L-shaped positioning plate , the two rectangular panels of the L-shaped positioning plate are respectively a first rectangular panel vertically arranged horizontally and a second rectangular panel vertically arranged, and the first rectangular panel is fixed on the base; An L-shaped positioning plate is provided on the front and rear sides of the piece, and the bonded glass specimen is clamped and positioned by the second rectangular panels of the two L-shaped positioning plates distributed on the front and rear sides. When the utility model is applied, the bonded steel plate and the bonded glass test piece are bonded together through structural glue, and then the bonded steel plate and the bonded glass test piece are clamped and positioned by the clamping mechanism On the base, the bonding length of the bonding steel plate and the bonded glass specimen and the thickness of the structural adhesive can be set according to the actual engineering situation, and the size of the bonding steel plate and the bonded glass specimen can also be adjusted. Set according to the specific needs. After making the corresponding settings, the fixed position of the L-shaped positioning plate can be changed so that the glass specimen to be bonded can be reliably clamped. When testing the bonding shear strength of the structural adhesive interface, a compressive load is applied to the upper end of the bonded steel plate by a material mechanics testing machine.

Further, the pedestal for testing the adhesive strength of the steel plate and the glass also includes a locking mechanism, and the second rectangular panels of the two L-shaped positioning plates on the front and rear sides of each bonded glass specimen are connected by the locking mechanism. The utility model connects two L-shaped positioning plates on the front and rear sides of each bonded glass specimen through a locking mechanism. When applying a compressive load to the bonded steel plates, the two L-shaped positioning plates can limit Position support, in this way, can make the positioning of the bonded glass specimen more stable, and can further improve the accuracy of the test.

Further, the four L-shaped positioning plates are respectively distributed in the left front of the left bonded glass sample, the left rear of the left bonded glass sample, and the right front and right sides of the right bonded glass sample. The right rear of the bonded glass specimen, and the second rectangular panel of the L-shaped positioning plate is partially set facing the bonded glass specimen; The locking mechanism is located on the left side of the glass specimen to be bonded on the left side, and the locking mechanism connecting the two L-shaped positioning plates that clamp the glass specimen to be bonded on the right side is located on the right side of the glass specimen to be bonded on the right side . In this way, the locking mechanism of the present utility model is arranged on the outside of the bonded glass test piece, which can prevent the height of the L-shaped positioning plate from limiting the height of the bonded glass test piece, and connect each bonded glass test piece. The operation is more convenient when there are two L-shaped positioning plates on the front and rear sides of the part.

Further, the second rectangular panel of the L-shaped positioning plate is formed with arc-shaped positioning holes running through its front and rear end faces, and the locking mechanism includes locking bolts passing through the arc-shaped positioning holes of the two front and rear L-shaped positioning plates and a lock nut sleeved on the lock bolt. The locking mechanism of the utility model is realized by using bolts and nuts. The locking bolts are in contact with the end surface of the bonded glass test piece. The movement of the bonded glass specimen to the left can also prevent the right glass specimen from moving to the right. The design of the locking mechanism of the present invention is simple and practical, and it is convenient to obtain materials. The arc-shaped positioning hole can adapt to the bonded glass test pieces of different positions and lengths when the bolt is fixed, and thus makes the locking mechanism of the present invention more adaptable to various engineering conditions. need.

Further, the left and right sides of the bonding steel plate and the bonded glass test piece are rectangular planes, and the width of the left and right sides of the bonding steel plate is greater than the width of the left and right sides of the bonded glass test piece. In this way, when the utility model is applied, the installation of the displacement meter and the layout of the structural glue are facilitated.

In summary, the utility model has the following beneficial effects: (1) The overall structure of the utility model is simple, easy to realize, and low in cost. The test can be completed, the test process is simple and easy to operate.

(2) The bonded steel plate and the bonded glass test piece of the utility model are placed vertically, and the in-plane rigidity is relatively large. The bonded glass test piece is clamped and positioned by the clamping mechanism, which can prevent tilting and can lift Stability during the test process, and can avoid torsion or eccentricity affecting the test accuracy.

(3) When the utility model is applied, the compressive load test is used to measure the shear strength, which can solve the problem that the glass sample cannot bear the tensile effect.

(4) When the utility model is applied, the bonding length of the interface glue can be tested and measured by using multiple steps, which can further improve the accuracy of the test.

(5) When the utility model is applied, the influence of the thickness of the structural adhesive can be simulated. The bonding structure of the test piece is basically consistent with the actual working conditions of the project, and the test results are more representative and practical.

(6) Since the bonding between the glass and the steel plate is the bonding between the glass end face and the main side of the steel plate, the utility model can accurately simulate the bonding interface of the steel flange-glass web I-beam in actual engineering when applied Under the shear force working condition, the utility model is used to test the shear strength of the bonding interface of the steel flange-glass web I-beam, which can make up for the existing bonding interface shear strength testing technology for the steel flange-glass web work. Insufficient evaluation of the shear performance of the I-beam bonding interface is critical to accurately evaluating the bonding safety of the steel flange-glass web I-beam structure, ensuring the safe and reliable use of the steel flange-glass web I-beam in service, and ensuring the safety of the people. It is of great significance to the safety of life and property and to promote the development of new structural adhesive materials.

Description of drawings

The drawings described here are used to provide a further understanding of the embodiments of the utility model, constitute a part of the application, and do not constitute a limitation to the embodiments of the utility model. In the attached picture:

Fig. 1 is the front view structure schematic diagram of a specific embodiment of the utility model;

Fig. 2 is the top view structure diagram of a specific embodiment of the utility model;

Fig. 3 is a side view schematic diagram of a specific embodiment of the utility model.

The names of parts corresponding to the marks in the attached drawings: 1. Adhesive steel plate, 2. Bonded glass specimen, 3. Displacement gauge, 4. L-shaped positioning plate, 5. Locking mechanism, 6. Base, 7. Structural glue, 8. Arc positioning hole, 9. Rib plate.

detailed description

In order to make the purpose, technical solutions and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the examples and accompanying drawings. The schematic implementation of the utility model and its description are only used to explain the utility model Novelty, not as a limitation to the utility model.

Example 1:

As shown in Figures 1 to 3, the pedestal used to test the strength of the steel plate and glass glue includes a bonded steel plate 1, a bonded glass specimen 2, a displacement meter 3, a base 6 and a clamping mechanism. The steel plate 1 is vertically arranged above the base 6 , and the displacement gauge 3 is installed on the bonded steel plate 1 . The bonded glass test piece 2 of this embodiment is vertically arranged and its bottom is in contact with the upper end surface of the base 6. The number of bonded glass test pieces 2 is two, and the two bonded glass test pieces 2 are symmetrically distributed on the bonding surface. The left and right sides of the steel plate 1 are connected, and the two bonded glass specimens 2 are fixedly connected to the bonded steel plate 1 through structural glue 7 . After the structural adhesive 7 of this embodiment bonds the bonding steel plate 1 and the glass sample 2 to be bonded, it forms a cured adhesive layer structure.

The clamping mechanism of the present embodiment includes an L-shaped positioning plate 4, and the L-shaped positioning plate 4 includes a first rectangular panel and a second rectangular panel vertically connected with the first rectangular panel. The first of the L-shaped positioning plate 4 in this embodiment The rectangular panel is vertically arranged horizontally, the second rectangular panel is vertically arranged, and the first rectangular panel is fixed on the base 6 by bolts. In this embodiment, an L-shaped positioning plate 4 is provided on the front and rear sides of each bonded glass test piece 2, and the bonded glass test piece 2 passes through two L-shaped positioning plates 4 distributed on its front and rear sides. The second rectangular panel is clamped and positioned. In order to strengthen the structural strength of the L-shaped positioning plate 4, the L-shaped positioning plate 4 of the present embodiment also includes a stiffener plate 9, and the stiffened rib plate 9 is obliquely arranged and its two ends are respectively connected to the first rectangular panel and the first rectangular panel of the L-shaped positioning plate 4. The second rectangular panel is fixedly connected.

When this embodiment tests the bonding shear strength of the structural adhesive interface, it specifically includes the following steps: Step 1, preset the thickness value of the structural adhesive 7 according to the actual engineering situation, and fix the base 6 on the material mechanics testing machine; Step 2, according to the preset Set the thickness value of the structural adhesive 7 to lay out two bonded glass test pieces 2, and then insert the lower end of the bonded steel plate 1 into the center of the two bonded glass test pieces 2, and then place the bonded steel plate 1 and the two bonded glass test pieces. The test piece 2 is bonded together by the structural adhesive 7; step 3, the two bonded glass test pieces 2 are clamped and positioned on the base 6 by the clamping mechanism; step 4, the material mechanics testing machine is used to bond the steel plate 1 Apply a vertical downward compressive load on the top, continue to increase the compressive load, and record the pressure value when the bonding interface is damaged; step 5, use the pressure value and the area of the bonding interface to calculate the structure The bonding shear strength of the adhesive bonding interface, where the formula for calculating the bonding shear strength of the structural adhesive bonding interface is: σc=P/A, where σc is the bonding shear strength of the structural adhesive interface, P is the pressure value when the structural adhesive bonding interface is destroyed, A is the sum of the area of the structural adhesive bonding interface; step 6, repeat steps 2 to 5, measure the bonding shear strength of the structural adhesive interface multiple times and calculate the average value , wherein, when the test is repeated, the length of the region where the lower end of the bonded steel plate 1 is embedded between the two bonded glass test pieces 2 and the length of the structural adhesive 7 are incremented by preset values.

Example 2:

This embodiment makes the following further limitations on the basis of Embodiment 1: this embodiment also includes a locking mechanism 5, the second of the two L-shaped positioning plates 4 on the front and rear sides of each bonded glass test piece 2 The rectangular panels are connected by a locking mechanism 5 . In this embodiment, two L-shaped positioning plates 4 on the front and rear sides of each bonded glass test piece 2 are connected by a locking mechanism 5, so that the structure of this embodiment is more stable. When a compressive load is applied to the bonded steel plate 1, The bonded glass test piece 2 of this embodiment is less prone to lateral deviation forward or backward.

Example 3:

This embodiment makes the following further limitations on the basis of Embodiment 2: when this embodiment is specifically set up, four L-shaped positioning plates 4 are respectively distributed in the left front of the left side of the bonded glass test piece 2, and the left side is The left rear of the glass test piece 2, the right front of the right glass test piece 2 and the right rear of the right glass test piece 2, and the second rectangular panel of the L-shaped positioning plate 4 are partially facing the bonded glass test piece 2. Connect glass specimen 2 to set. The locking mechanism 5 that connects and clamps the two L-shaped positioning plates 4 that clamp the left glass specimen 2 to be bonded is located on the left side of the left glass specimen 2 to be bonded, and connects and clamps the right glass specimen to be bonded. The locking mechanism 5 of the two L-shaped positioning plates 4 of 2 is located on the right side of the glass test piece 2 to be bonded on the right side. The L-shaped positioning plate 4 part of the present embodiment exceeds the outer edge of the bonded glass test piece 2, and the locking mechanism 5 specifically connects the part of the L-shaped positioning plate 4 that exceeds the bonded glass test piece 2. In this way, when the present embodiment is applied The influence caused by the locking mechanism 5 on the layout of the bonded glass test piece 2 can be reduced.

Example 4:

This embodiment makes the following further limitations on the basis of Embodiment 3: the second rectangular panel of the L-shaped positioning plate 4 of this embodiment is formed with an arc-shaped positioning hole 8 that runs through its front and rear end faces. The mechanism 5 includes a locking bolt and a locking nut. In this embodiment, the locking mechanism 5 passes through the arc-shaped positioning holes 8 of the front and rear L-shaped positioning plates 4 through the locking bolt and sets the locking nut on the locking bolt. , and then realize the fixed connection of the front and rear two L-shaped positioning plates 4. The locking bolt of this embodiment is in contact with the surface of the end surface of the bonded glass test piece 2, and the arc-shaped positioning hole 8 provides a reaction force, and is fixed with a nut, which can prevent the left side of the bonded glass test piece 2 when a compressive load is applied. Moving to the left also prevents the bonded glass specimen 2 on the right from moving to the right.

Example 5:

This embodiment makes the following further limitations on the basis of any one of Embodiments 1 to 4: the left and right sides of the bonded steel plate 1 and the bonded glass test piece 2 in this embodiment are rectangular plane, and the width of the left and right sides of the bonded steel plate 1 is greater than the width of the left and right sides of the glass specimen 2 to be bonded. When this embodiment is applied, the displacement gauge 3 is specifically installed on the part where the lower end of the bonded steel plate 1 is located outside the area between the two bonded glass test pieces 2 .

The specific embodiments described above have further described the purpose, technical solutions and beneficial effects of the present utility model in detail. Within the protection scope of the utility model, any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the utility model shall be included in the protection scope of the utility model.

Claims (5)

1. for testing the pedestal of steel plate and glass adhesive strength, it is characterised in that include bonding steel plate (1), glued glass Test specimen (2), displacement meter (3), base (6) and clamping device, described bonding steel plate (1) is vertically arranged at base (6) top, described Displacement meter (3) is installed on bonding steel plate (1)；Described glued glass test specimen (2) is vertically arranged on base (6), glued The quantity of glass test specimen (2) is two, and two described glued glass test specimens (2) are symmetrically distributed in bonding steel plate (1) left and right Both sides, and two described glued glass test specimens (2) are all by the fixing connection of structure glue (7) and bonding steel plate (1)；Described folder Hold mechanism and include that L-type location-plate (4), two pieces of rectangular panel of described L-type location-plate (4) are respectively first that vertical equity is arranged Rectangular panel and the second rectangular panel being vertically arranged, described first rectangular panel is fixed on base (6)；Each glued glass Before and after before and after glass test specimen (2), both sides are equipped with one piece of L-type location-plate (4), and glued glass test specimen (2) is by being distributed in it Second rectangular panel clamping position of two pieces of L-type location-plates (4) of both sides.

Pedestal for testing steel plate and glass adhesive strength the most according to claim 1, it is characterised in that also include lock Tight mechanism (5), before and after each glued glass test specimen (2), the second rectangular panel of two pieces of L-type location-plates (4) of both sides is by lock Tight mechanism (5) connects.

Pedestal for testing steel plate and glass adhesive strength the most according to claim 2, it is characterised in that described in four pieces L-type location-plate (4) to be distributed in left side glued glass test specimen (2) left front, left side glued glass test specimen (2) respectively left back Side, glued glass test specimen (2) right front, right side and right side glued glass test specimen (2) right back, and L-type location-plate (4) Glued glass test specimen (2) is just arranged by the second rectangular panel all local；Connect clamping on the left of glued glass test specimen (2) two The retaining mechanism (5) of block L-type location-plate (4) is positioned at the left side of the glued glass test specimen (2) in left side, connects on the right side of clamping glued The retaining mechanism (5) of two pieces of L-type location-plates (4) of glass test specimen (2) is positioned at the right side of the glued glass test specimen (2) in right side.

Pedestal for testing steel plate and glass adhesive strength the most according to claim 3, it is characterised in that described L-type Second rectangular panel of location-plate (4) is constituted arc hole, location (8) running through its front/rear end, and described retaining mechanism (5) wraps The clamping screw including arc hole, location (8) through two pieces of L-type location-plates (4) of front and back and the locking screw being sheathed on clamping screw Female.

5. according to the pedestal for testing steel plate and glass adhesive strength described in any one in Claims 1 to 4, its feature Being, described bonding steel plate (1) and glued glass test specimen (2) both left and right sides are rectangle plane, and bonding steel plate (1) width of left and right side is more than the width of glued glass test specimen (2) left and right side.