Device and method for testing bonding reliability of sealing strip

Abstract

The invention provides a device and a method for testing the bonding reliability of a sealing strip. The device comprises a supporting table, a support and a pressing block. The supporting table is used for bearing a to-be-tested sealing strip. The support is detachably installed on the supporting table. The pressing block is movably installed on the support and moves back and forth in the direction perpendicular to the length direction of the sealing strip to be detected. The method comprises the following steps: fixing a sealing strip to be tested on a support table; the position of the pressing block on the support is adjusted, and compression load is applied to the sealing strip through the pressing block; placing the sealing strip and the adjusted device for testing the bonding reliability of the sealing strip in an environmental aging box for a preset time; and observing the bonding state of the sealing strip in the compression process and / or after compression, and evaluating the bonding reliability of the sealing strip. According to the invention, the stress state of the sealing strip under the actual installation condition can be simulated through a miniaturized laboratory test device, the test cost can be greatly reduced, and the test result is more reliable.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile parts detection, and in particular to a device and method for testing the bonding reliability of a sealing strip. Background Art

[0002] The exterior door seal is a crucial component of the vehicle's sealing system. It's the first seal of the door opening, and therefore also known as the "first seal." In the automotive industry, the first seal is typically installed and secured to the vehicle door using snaps or double-sided tape. Traditional vehicle models often use snaps to secure the first seal to the door. With technological advancements and improved performance of acrylic double-sided tape products, more and more automakers are choosing to use acrylic double-sided tape instead of snaps for the installation of the first seal. Using double-sided tape for bonding provides the seal with improved installation adjustability, body conformity, vehicle sealing, and improved wind noise performance.

[0003] Since the first density strip is under dynamic and static stress during the frequent door opening and closing process and in the door closing and sealing state, the tape needs to withstand complex stress and environmental loads along with the sealing strip after bonding. Assuming that the door closing direction MM is as follows Figure 1 As shown in the figure, the sealing strip A is attached to the inner door panel C by double-sided tape B. When the door is closed, the body sheet metal D will compress the sealing strip A, causing it to deform S as shown in the figure. res , the double-sided tape will be subjected to the stress F as shown in the figure res , which in turn affects the bonding reliability of the sealing strip. Therefore, how to test the bonding reliability of the first sealing strip after installation has become a primary issue facing component design, tape selection, and process development.

[0004] One way is to evaluate the adhesive performance of the tape through tape material performance tests, but these tests are generally destructive tests at fixed angles, such as (90° / 135° / 180°) peel tests or 180° dynamic shear tests. The test conditions and working conditions are significantly different from the complex working conditions of actual sealing strip installation or stress, and cannot reflect the actual risks after the parts are installed on the vehicle. Another way is to examine the bonding reliability of double-sided tapes under various actual working conditions after the sealing strips are installed. The method currently commonly used by various OEMs is to conduct bonding reliability assessments in the first-installation state through vehicle functional tests (including vehicle road tests, vehicle environmental alternation, door opening and closing durability, etc.). However, the disadvantage of this type of vehicle functional test is that the cost and threshold are high. It requires the coordination of high-cost hardware and resource investment such as vehicle trial assembly and vehicle environmental chambers. It is impossible to quickly verify multiple parallel design schemes simultaneously in the early stages of design, which will greatly increase the development and verification costs of the sealing strip system. Summary of the Invention

[0005] The purpose of the present invention is to provide a device and method for testing the bonding reliability of sealing strips to solve the above-mentioned problems. The stress state of the sealing strip under actual installation conditions can be simulated by a miniaturized laboratory testing device, which can greatly reduce the testing cost and make the test results more reliable.

[0006] The present invention provides a device for testing the bonding reliability of a sealing strip, comprising a support platform, a bracket and a pressing block;

[0007] The support platform is used to carry the sealing strip to be tested;

[0008] The bracket is detachably mounted on the support platform;

[0009] The pressing block is movably mounted on the bracket and moves forward and backward along a direction perpendicular to the length of the sealing strip to be tested.

[0010] In one embodiment, the bracket is provided with a long strip-shaped through hole;

[0011] The pressing block is movably mounted on the bracket by cooperating with the long strip through hole through bolts.

[0012] In one embodiment, the device for testing the sealing strip bonding reliability further comprises a driving mechanism, wherein the driving mechanism comprises a driver and a connecting rod;

[0013] The driver is connected to the connecting rod to drive the connecting rod to perform reciprocating linear motion;

[0014] The connecting rod is detachably connected to the pressing block, driving the pressing block to reciprocate on the bracket.

[0015] In one embodiment, the driving mechanism further includes a fixing plate, the driver is fixedly arranged on the fixing plate, and the fixing plate is detachably mounted on the support platform.

[0016] In one embodiment, a sliding groove is provided on the bracket in a direction perpendicular to the length of the sealing strip to be tested;

[0017] A sliding foot is provided on one side of the pressing block close to the bracket;

[0018] The sliding foot is embedded in the sliding groove and moves along the sliding groove.

[0019] In one embodiment, the device for testing the bonding reliability of the sealing strip further comprises a template, and the template is used to stick the sealing strip to be tested;

[0020] A template positioning groove is provided on one side of the bracket close to the support platform, and the height of the template positioning groove is consistent with the height of the template;

[0021] The template is embedded in the template positioning groove, and the bracket is fixed on the support platform by bolts, pressing the template to limit and fix the template.

[0022] In one embodiment, the size and shape of the side of the pressing block facing the sealing strip to be tested are consistent with the sheet metal surface of the vehicle body.

[0023] The present invention also provides a method for testing the bonding reliability of a sealing strip. The method is applied to the device for testing the bonding reliability of a sealing strip as described above, and comprises the following steps:

[0024] Fix the sealing strip to be tested on the support table;

[0025] Adjust the position of the pressing block on the bracket to apply a compressive load to the sealing strip through the pressing block;

[0026] Place the sealing strip and the adjusted device for testing the bonding reliability of the sealing strip into an environmental aging chamber for a preset time;

[0027] The bonding state of the sealing strip during and / or after compression was observed to evaluate the bonding reliability of the sealing strip.

[0028] In one embodiment, when performing a static load test on the sealing strip, the position of the pressing block on the bracket is adjusted until the sealing strip reaches a predetermined pressing amount, and the position of the pressing block on the bracket is fixed;

[0029] When the sealing strip is subjected to a dynamic load test, the driving mechanism drives the pressure block to perform reciprocating linear motion on the bracket in a direction perpendicular to the length of the sealing strip to be tested, so that the amount of pressure on the sealing strip when the pressure block is closest to the sealing strip is consistent with the maximum excess when the actual vehicle door is closed, and the sealing strip completely rebounds when the pressure block is farthest away from the sealing strip.

[0030] In one embodiment, the method for testing the bonding reliability of the sealing strip further comprises: testing the residual bonding force of the sealing strip after compression using a universal testing machine.

[0031] Compared with the prior art, the device and method for testing the bonding reliability of a sealing strip of the present invention have the following advantages:

[0032] 1) Compared with existing laboratory test methods (such as tape peel force and shear force), the present invention can simulate the bonding reliability of the first sealing strip after installation under various complex working conditions (static and dynamic loads, temperature and humidity alternating environments) and actual stress conditions through accelerated aging dynamic and static loads. The test conditions are closer to the actual application conditions, and can effectively evaluate and predict the actual bonding risk of the sealing strip on the whole vehicle. The results are more referenceable and have stronger guiding significance, which can greatly improve the effectiveness of actual quality control and risk assessment prediction.

[0033] 2) The present invention replaces the whole vehicle functional test with a miniaturized laboratory test device, which can achieve equivalent simulation of the dynamic and static loads and environmental conditions of a real vehicle, and realize a true simulation of the actual environmental conditions and actual dynamic and static load conditions after the first sealing strip is installed on the vehicle, which is used to predict and evaluate the actual debonding risk. It is simple and easy to operate, and can greatly reduce the test cost and test threshold, greatly improving the experimental efficiency and experimental flexibility.

[0034] 3) The present invention can develop and verify different vehicle body paints and different design structures in a short period of time, and can quickly and simultaneously verify multiple parallel design schemes in the early stages of design, greatly reducing the development and verification costs of the sealing strip system. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a schematic diagram of the installation status of the first sealing strip of the car door;

[0036] Figure 2 Schematic diagram of a device for testing the bonding reliability of a sealing strip according to an embodiment of the present invention;

[0037] Figure 3 A top view of a device for testing the bonding reliability of a sealing strip according to an embodiment of the present invention;

[0038] Figure 4a A top view of a support platform in a device for testing the bonding reliability of a sealing strip according to an embodiment of the present invention;

[0039] Figure 4b A cross-sectional view of a support platform in a device for testing the bonding reliability of a sealing strip according to an embodiment of the present invention;

[0040] Figure 5a A top view of a bracket in a device for testing the bonding reliability of a sealing strip according to an embodiment of the present invention;

[0041] Figure 5b A cross-sectional view of a bracket in a device for testing the bonding reliability of a sealing strip according to an embodiment of the present invention;

[0042] Figure 5c A bottom view of a bracket in a device for testing the bonding reliability of a sealing strip according to an embodiment of the present invention;

[0043] Figure 6a A front view of a pressing block in a device for testing the bonding reliability of a sealing strip according to an embodiment of the present invention;

[0044] Figure 6b A bottom view of a pressing block in a device for testing the bonding reliability of a sealing strip according to an embodiment of the present invention;

[0045] Figure 6c A side view of a pressing block in a device for testing the bonding reliability of a sealing strip according to an embodiment of the present invention;

[0046] Figure 7a A top view of a driving mechanism in a device for testing the bonding reliability of a sealing strip according to an embodiment of the present invention;

[0047] Figure 7b A side view of a driving mechanism in a device for testing the bonding reliability of a sealing strip according to an embodiment of the present invention;

[0048] Figure 7c A front view of a driving mechanism in a device for testing the bonding reliability of a sealing strip according to an embodiment of the present invention;

[0049] Figure 8 This is a schematic diagram of the use of a device for testing the bonding reliability of a sealing strip according to an embodiment of the present invention when performing a dynamic load test on a sealing strip;

[0050] Figure 9a This is a schematic diagram of the state of the connecting rod at maximum stroke when the device for testing the bonding reliability of a sealing strip according to one embodiment of the present invention performs a dynamic load test on the sealing strip;

[0051] Figure 9b This is a schematic diagram of the state of the connecting rod at the minimum stroke when the device for testing the bonding reliability of a sealing strip according to one embodiment of the present invention performs a dynamic load test on the sealing strip.

[0052] Reference numerals

[0053] 1. Support platform; 2. Bracket; 21. Sample positioning groove; 22. Long strip through hole; 23. Slide groove; 3. Press block; 31. Slide foot; 4. Drive mechanism; 41. Fixing plate; 42. Connecting rod; 43. Driver; 5. Sample;

[0054] A, sealing strip; B, double-sided tape; C, door inner panel; D, body sheet metal; MM, door closing direction; S res , deformation direction of sealing strip; F res , the stress direction of double-sided tape. DETAILED DESCRIPTION

[0055] In order to make the objectives, technical solutions and advantages of the present invention more understandable, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that many specific details are set forth in the following description to facilitate a full understanding of the present invention, but the present invention can also be implemented in other ways different from those described herein, and those skilled in the art can make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0056] Next, the present invention is described in detail with reference to schematic diagrams. When describing the embodiments of the present invention, for ease of illustration, cross-sectional views illustrating device structures may be partially enlarged and not to scale. Furthermore, the schematic diagrams are merely illustrative and should not limit the scope of protection of the present invention. Furthermore, in actual production, three-dimensional dimensions, including length, width, and depth, should be included.

[0057] Furthermore, the phrases "one embodiment" or "an embodiment" in this application refer to specific features, structures, or characteristics that may be included in at least one implementation of the present invention. The phrases "in one embodiment" or "an embodiment" appearing in different places in this specification do not necessarily refer to the same embodiment, nor do they refer to separate or selective embodiments that are mutually exclusive with other embodiments. The terms "including" and "comprising" indicate the presence of the claimed features, but do not exclude the presence of one or more other features. The term "and / or" as used in this application includes any and all combinations of one or more of the associated listed items.

[0058] The present invention proposes a device for testing the bonding reliability of sealing strips, see Figure 2 、 Figure 3 、 Figure 4a 、 Figure 4b , including a support platform 1, a bracket 2 and a pressure block 3. The support platform 1 is used to carry the sealing strip A to be tested, as well as components such as the bracket 2 and the pressure block 3. The bracket 2 is detachably mounted on the support platform 1. The pressure block 3 is movably mounted on the bracket 2 and moves back and forth in a direction perpendicular to the length of the sealing strip A to be tested. The sealing strip A is usually in the shape of a long strip as a whole, and the cross-section is designed to be a specific geometric shape, such as C-shape, U-shape, E-shape or a hollow structure, so as to better fill the gap and provide an effective sealing effect. In the device for testing the bonding reliability of the sealing strip of the present application, the pressure block 3 can move back and forth in a direction perpendicular to the length of the sealing strip, that is, it can move back and forth in the direction of the cross-section of the sealing strip, so as to adjust the compressive load of the pressure block 3 on the sealing strip A to be tested.

[0059] like Figure 5a 、 5bAs shown in Figures 5c, 6a, 6b, and 6c, an elongated through hole 22 is provided on the bracket 2 of one embodiment of the present invention. The elongated through hole 22 is used to position and connect the pressure block 3. Bolt holes are provided on the pressure block 3, and the pressure block 3 is movably mounted on the bracket 2 by means of bolts and the elongated through hole 22, so that the pressure block 3 is positioned and fixed on the bracket 2. In other words, the pressure block 3 is matched with the elongated through hole 22 by bolts to achieve sliding adjustment along the direction of the elongated through hole 22, and is locked and fixed by bolts. It should be noted that in addition to using the method of matching bolts and elongated through holes, a guide rail can be installed on the bracket 2, and a slider can be provided at the bottom of the pressure block 3 so that the pressure block 3 can slide on the bracket 2. After reaching the predetermined position, the slider can be fixed by a locking mechanism such as a screw or a clamping device. Of course, the function of the pressure block 3 being movable and fixed on the bracket 2 can also be achieved by various methods such as slot snap fit, gear rack fit, etc.

[0060] The device for testing the bonding reliability of a sealing strip according to an embodiment of the present invention further comprises a driving mechanism 4, see Figure 7a 、 7b , 7c, the driving mechanism 4 includes a driver 43, a connecting rod 42 and a fixed plate 41. The driver 43 is connected to the connecting rod 42, driving the connecting rod 42 to perform reciprocating linear motion. A bolt hole is provided at the end of the connecting rod 42, and a bolt hole is also provided on the pressure block 3. The connecting rod 42 is detachably connected to the pressure block 3 by bolts, and the connecting rod 42 is fixed to the pressure block 3, so that the connecting rod 42 can drive the pressure block 3 to reciprocate on the bracket 2. The driver 43 is fixedly set on the fixed plate 41, and the fixed plate 41 is provided with bolt holes. It is detachably mounted on the support platform 1 by bolts to fix the driving mechanism 4.

[0061] Driver 43 can be a linear motor, servo motor, stepper motor, or other device capable of directly achieving reciprocating motion. It can also be a combination of a conventional rotary motor and a slider-crank mechanism. The slider-crank mechanism converts the rotary motion of the conventional rotary motor into linear reciprocating motion, thereby driving connecting rod 42 and, in turn, causing pressure block 3 to reciprocate along the direction of the sealing strip cross section. The motor can also adjust parameters such as the travel, speed, and number of movements.

[0062] Preferably, the bolt hole on the pressure block 3 used to connect to the long strip through hole 22 of the bracket is the same as the bolt hole used to connect to the driving mechanism connecting rod 42. When the device for testing the bonding reliability of the sealing strip of the present application is used to perform a static load test on the sealing strip A, after adjusting the pressure block 3 to a suitable position based on the preset compression load, a bolt is passed through the bolt hole and the long strip through hole 22 on the pressure block 3 to fix the position of the pressure block 3 to simulate the static compression load applied by the body sheet metal to the first sealing strip. When the device for testing the bonding reliability of the sealing strip of the present application is used to perform a dynamic load test on the sealing strip A, a bolt is passed through the bolt hole on the connecting rod 42 and the bolt hole on the pressure block 3 to fix the connecting rod 42 to the pressure block 3, and the driver 43 drives the connecting rod 42 to perform reciprocating linear motion, thereby driving the pressure block 3 to reciprocate on the bracket 2, so that the pressure block 3 performs dynamic reciprocating compression on the sealing strip A, simulating the dynamic compression load that the first sealing strip is subjected to during the door opening and closing process in the actual installation state.

[0063] like Figure 5a 、 5b As shown in Figures 5c, 6a, 6b, and 6c, a bracket 2 of one embodiment of the present invention is provided with a slide groove 23 in a direction perpendicular to the length of the sealing strip A to be tested. A sliding foot 31 is provided on the side of the pressure block 3 close to the bracket 2. The sliding foot 31 matches the slide groove 23, is embedded in the slide groove 23, and moves along the slide groove 23 under the guidance of the slide groove 23. The slide groove 23 can also limit the sliding foot 31 in directions other than the direction of movement to prevent the pressure block 3 from deviating from linear motion. Furthermore, the slide groove 23 is processed into a T shape, and the groove width is larger near the inside of the bracket. The shape of the sliding foot 31 matches the shape of the slide groove 23, and the width is wider near the inside of the bracket. The design of different widths can further stabilize the reciprocating linear motion of the sliding foot 31 in the slide groove 23. Preferably, there are two slide grooves 23, and correspondingly, there are also two sliding feet 31.

[0064] An apparatus for testing the adhesive reliability of a sealing strip according to one embodiment of the present invention further includes a sample 5. The sample 5 is used to adhere the sealing strip A to be tested. A sample positioning groove 21 is provided on the side of the bracket 2 close to the support platform 1, and the height of the sample positioning groove 21 is consistent with the height of the sample 5. The sample 5 is embedded in the sample positioning groove 21. The bracket 2 is in the shape of an elongated strip, with bolt holes provided at both ends. The bracket 2 is fixed to the support platform 1 by bolts, and the sample 5 is pressed to limit the position of the sample 5. The sample 5 is preferably a paint sample to simulate the actual adhesion of the sealing strip on the inner panel of the car door. The sealing strip A to be tested is pasted on the sample 5 instead of directly on the support platform 1 in order to facilitate the placement of the sealing strip A on a universal testing machine after applying a compressive load for further residual adhesion testing. In addition to using the bracket 2 to press the sample 5 for limit fixation, the sample 5 can also be detachably fixed to the support platform 1 separately, such as by bolts.

[0065] The size and shape of the side of the pressing block 3 facing the tested sealing strip A in one embodiment of the present invention are consistent with the body sheet metal surface in the gray area of ​​the door opening of the pre-tested vehicle model, so as to simulate the compression of the body sheet metal surface on the sealing strip under actual vehicle installation.

[0066] In the device for testing the bonding reliability of sealing strips of the present application, the support platform 1, bracket 2, pressure block 3 and driving mechanism 4 can be made of metal materials such as aluminum alloy, or can be made of non-metallic materials such as nylon composite materials, and have the characteristics of high dimensional stability, high temperature resistance, low temperature resistance and corrosion resistance.

[0067] The present invention also provides a method for testing the bonding reliability of a sealing strip. The method is applied to the device for testing the bonding reliability of a sealing strip as described above, and comprises the following steps:

[0068] Fix the sealing strip A to be tested on the support platform 1;

[0069] Adjust the position of the pressing block 3 on the bracket 2 to apply a compressive load to the sealing strip A through the pressing block 3;

[0070] Place the sealing strip A and the adjusted device for testing the sealing strip bonding reliability into an environmental aging chamber for a preset time;

[0071] The bonding state of the sealing strip A during and / or after compression was observed, and the residual bonding force of the sealing strip A after compression was tested using a universal testing machine to evaluate the bonding reliability of the sealing strip A.

[0072] Specifically, when performing a static load test on sealing strip A, the position of pressing block 3 on bracket 2 is adjusted until sealing strip A reaches a predetermined penetration, and the position of pressing block 3 on bracket 2 is fixed. When performing a dynamic load test on sealing strip A, the driving mechanism drives pressing block 3 to perform reciprocating linear motion on bracket 2 in a direction perpendicular to the length of sealing strip A to be tested, so that the penetration amount of sealing strip A by pressing block 3 when closest to sealing strip A (i.e., the maximum penetration amount of sealing strip by pressing block 3) is consistent with the maximum overshoot when the vehicle door is closed, and the sealing strip A fully rebounds when pressing block 3 is farthest away from sealing strip A.

[0073] The following describes in detail the operating steps for static load testing and dynamic load testing of sealing strips.

[0074] When the static load test of the sealing strip is performed using the above-mentioned device for testing the bonding reliability of the sealing strip, the operating steps include:

[0075] 1) Adhere and install the sealing strip A to be tested on the paint sample 5 (the paint of the sample 5 is consistent with the paint of the actual vehicle door).

[0076] 2) Pass the paint sample 5 through the sample positioning groove 21 of the bracket 2, press the paint sample 5 with the bracket 2, and fix the paint sample 5 on the support platform 1.

[0077] 3) Assemble the sliding foot 31 of the pressing block into the sliding groove 23 of the bracket.

[0078] 4) Move the pressing block 3 along the slide groove 23, compress the sealing strip A and push it to the required compression amount (depending on the actual vehicle model). Bolts are passed through the elongated through-holes 22 of the bracket and the bolt holes of the pressing block to fix the pressing block 3 on the bracket 2. This allows the pressing block 3 to simulate the actual vehicle body assembly dimensions and continuously apply a static compressive load to the sealing strip A.

[0079] 5) After assembling the above test device, the device can be placed in the required environmental aging chamber for a predetermined period of time as required to simulate the bonding state of the vehicle under various environmental conditions after the sealing strip is installed and the cabin door is closed. Typical operating conditions include 40℃ / 100% humidity / 168h, 90℃ / 168h, etc.

[0080] 6) Observe and evaluate the bonding state of sealing strip A during and after compression to assess the risk of debonding under corresponding working conditions after the part is installed on the vehicle.

[0081] 7) After compression, the paint sample and the bonded sealing strip (if it has not failed due to debonding) can be removed and the residual bonding strength of the sealing strip after static compression load and environmental aging can be further tested using a universal testing machine to provide quantitative data support for part development.

[0082] When the dynamic load test of the sealing strip is performed using the above-mentioned device for testing the bonding reliability of the sealing strip, the operating steps include:

[0083] 1) Adhere and install the sealing strip A to be tested on the paint sample 5 (the paint of the sample 5 is consistent with the paint of the actual vehicle door).

[0084] 2) Assemble the sliding foot 31 of the pressing block into the sliding groove 23 of the bracket.

[0085] 3) Install and fix the driving mechanism 4 on the support platform 1, and fix the connecting rod 42 to the pressing block 3 through bolts, see Figure 8 .

[0086] 4) Place the paint sample 5 with the sealing strip attached on the support 1 and move it forward and backward along the sample positioning groove 21 of the bracket to a suitable position: ensure that the amount of pressure of the pressing block 3 on the sealing strip bubble tube at the maximum stroke of the connecting rod 42 is consistent with the maximum excess when the door of the actual vehicle is closed ( Figure 9a ), when the connecting rod 42 retracts, the pressing block 3 can be separated from the sealing strip, so that the sealing strip can rebound completely ( Figure 9b ).

[0087] 5) After the position adjustment is completed, the paint sample 5 is fixed to the support platform 1 by tightening the bolts on the bracket 2. The reciprocating motion of the pressing block 3 simulates the dynamic load on the first sealing strip under the door opening and closing conditions in the actual vehicle installation state.

[0088] 6) After assembling the above test device, the device can be placed in the required environmental aging chamber for a predetermined period of time as required to simulate the bond durability and reliability of the seal strip under the dynamic load of frequent door opening and closing in various environmental conditions after installation. Typical operating conditions include 40°C / 100% humidity / 10,000 reciprocating movements (1.2m / s), 0°C / 20,000 reciprocating movements (1.5m / s), etc.

[0089] 7) Observe and evaluate the bonding state of sealing strip A during and after compression to assess the risk of debonding under corresponding working conditions after the part is installed on the vehicle.

[0090] 8) After compression, the paint sample and the bonded sealing strip (if it has not failed due to debonding) can be removed and the residual bonding strength of the sealing strip after static compression load and environmental aging can be further tested using a universal testing machine to provide quantitative data support for part development.

[0091] It should be noted that the directions or positional relationships indicated by terms such as "upper", "lower", "left", "right", "inside", "outside", "top", and "bottom" are all based on the directions or positional relationships shown in the accompanying drawings. Such expressions are only intended to make the description of the present invention simpler and more convenient, and do not indicate or imply that the referred components must have a specific direction or be constructed and operated in a specific direction.

[0092] In addition, in this application, unless otherwise clearly specified and limited, "installation", "connection", "setting" and other similar terms should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, an indirect connection through an intermediate medium, or a connection between two components. Those skilled in the art can understand the specific meanings of the above terms in this application according to the specific circumstances.

[0093] The present invention has the following beneficial effects:

[0094] 1) Compared with existing laboratory test methods (such as tape peel force and shear force), the present invention can simulate the bonding reliability of the first sealing strip after installation under various complex working conditions (static and dynamic loads, temperature and humidity alternating environments) and actual stress conditions through accelerated aging dynamic and static loads. The test conditions are closer to the actual application conditions, and can effectively evaluate and predict the actual bonding risk of the sealing strip on the whole vehicle. The results are more referenceable and have stronger guiding significance, which can greatly improve the effectiveness of actual quality control and risk assessment prediction.

[0095] 2) The present invention replaces the whole vehicle functional test with a miniaturized laboratory test device, which can achieve equivalent simulation of the dynamic and static loads and environmental conditions of a real vehicle, and realize a true simulation of the actual environmental conditions and actual dynamic and static load conditions after the first sealing strip is installed on the vehicle, which is used to predict and evaluate the actual debonding risk. It is simple and easy to operate, and can greatly reduce the test cost and test threshold, greatly improving the experimental efficiency and experimental flexibility.

[0096] 3) The present invention can develop and verify different vehicle body paints and different design structures in a short period of time, and can quickly and simultaneously verify multiple parallel design schemes in the early stages of design, greatly reducing the development and verification costs of the sealing strip system.

[0097] Although the above methods are illustrated and described as a series of acts for simplicity of explanation, it is to be understood and appreciated that these methods are not limited by the order of the acts, as some acts may occur in a different order and / or concurrently with other acts from those illustrated and described herein or not illustrated and described herein but understandable to those skilled in the art according to one or more embodiments.

[0098] The construction and arrangement of the present application shown in a number of different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., size, structure, shape, and proportion, as well as parameter values, mounting arrangements, use of materials, changes in orientation, etc.) without departing substantially from the novel teachings and advantages of the subject matter described in this application. For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of the element may be inverted or otherwise changed, and the nature, number, or position of the discrete elements may be altered or changed. Therefore, all such modifications are intended to be included within the scope of the present invention. The order or sequence of any process or method steps may be changed or reordered according to alternative embodiments. In the claims, any "means-plus-function" clause is intended to cover the structures described herein that perform the functions described, and not only structural equivalence but also equivalent structures. Without departing from the spirit and substance of the present invention, those skilled in the art may make various corresponding modifications and variations according to the present invention, but these corresponding modifications and variations should all fall within the scope of protection of the present invention.

Claims

1. A device for testing the bonding reliability of a sealing strip, characterized in that: It includes a support table, a bracket and a pressing block; The support platform is used to carry the sealing strip to be tested; The bracket is detachably mounted on the support platform; The pressing block is movably mounted on the bracket and moves forward and backward along a direction perpendicular to the length of the sealing strip to be tested.

2. The device for testing the bonding reliability of a sealing strip according to claim 1, characterized in that: The bracket is provided with a long strip through hole; The pressing block is movably mounted on the bracket by means of bolts cooperating with the long strip through holes.

3. The device for testing the bonding reliability of a sealing strip according to claim 1, characterized in that: Also included is a driving mechanism, the driving mechanism comprising a driver and a connecting rod; The driver is connected to the connecting rod to drive the connecting rod to perform reciprocating linear motion; The connecting rod is detachably connected to the pressing block to drive the pressing block to reciprocate on the bracket.

4. The device for testing the bonding reliability of a sealing strip according to claim 3, characterized in that: The driving mechanism further comprises a fixing plate, the driver is fixedly arranged on the fixing plate, and the fixing plate is detachably mounted on the supporting platform.

5. The device for testing the bonding reliability of a sealing strip according to claim 1, characterized in that: The bracket is provided with a slide groove in a direction perpendicular to the length of the sealing strip to be tested; A sliding foot is provided on one side of the pressing block close to the bracket; The sliding foot is embedded in the sliding groove and moves along the sliding groove.

6. The device for testing the bonding reliability of a sealing strip according to claim 1, characterized in that: Also included is a sample plate, which is used to stick the sealing strip to be tested; A template positioning groove is provided on one side of the bracket close to the support platform, and the height of the template positioning groove is consistent with the height of the template; The template is embedded in the template positioning groove, and the bracket is fixed on the support platform by bolts and presses the template to limit and fix the template.

7. The device for testing the bonding reliability of a sealing strip according to claim 1, characterized in that: The size and shape of the side of the pressing block facing the sealing strip to be tested are consistent with the sheet metal surface of the vehicle body.

8. A method for testing the bonding reliability of a sealing strip, characterized in that: The method is applied to the device for testing the bonding reliability of a sealing strip as claimed in any one of claims 1 to 7, comprising the following steps: Fix the sealing strip to be tested on the supporting table; Adjust the position of the pressing block on the bracket to apply a compressive load to the sealing strip through the pressing block; Place the sealing strip and the adjusted device for testing the bonding reliability of the sealing strip into an environmental aging box for a preset time; The bonding state of the sealing strip during and / or after compression was observed to evaluate the bonding reliability of the sealing strip.

9. The method for testing the bonding reliability of a sealing strip according to claim 8, characterized in that: When the sealing strip is subjected to a static load test, the position of the pressing block on the bracket is adjusted until the sealing strip reaches a predetermined pressing amount, and the position of the pressing block on the bracket is fixed; When the sealing strip is subjected to a dynamic load test, the driving mechanism drives the pressure block to perform reciprocating linear motion on the bracket in a direction perpendicular to the length of the sealing strip to be tested, so that the amount of pressure on the sealing strip when the pressure block is closest to the sealing strip is consistent with the maximum excess when the door of the actual vehicle is closed, and the sealing strip completely rebounds when the pressure block is farthest from the sealing strip.

10. The method for testing the bonding reliability of a sealing strip according to claim 8, characterized in that: Also includes: The residual adhesion of the sealing strip after compression is tested by a universal testing machine.

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