A method, a testing tool and a system for testing the volume expansion rate of a shock-absorbing rubber

Abstract

The present application relates to a method, a test fixture and a system for testing the volume expansion rate of a shock-absorbing rubber, and relates to the technical field of vehicle body manufacturing. The method is applied to a test system for the volume expansion rate of a shock-absorbing rubber, and the system includes a pre-made test fixture and a thermomechanical analyzer. The method includes: obtaining the initial fixture total height and the initial height of the colloid of the test fixture pre-injected with the shock-absorbing rubber to be tested; placing the test fixture in the sample area of ​​the thermomechanical analyzer; controlling the thermomechanical analyzer to heat the test fixture according to the preset target temperature and the test heating rate; obtaining the instantaneous movement distance of the push rod corresponding to each test moment during the heating process; for each test moment, determining the volume expansion rate of the shock-absorbing rubber to be tested at the test moment according to the initial fixture total height, the initial height of the colloid and the instantaneous movement distance of the push rod corresponding to the test moment. The present application can obtain the volume expansion rate of the shock-absorbing rubber at each test moment during the heating process of the shock-absorbing rubber.

Description

Technical Field

[0001] The present application relates to the technical field of vehicle body manufacturing, and in particular to a testing method, testing tooling and system for the volume expansion rate of shock-absorbing rubber. Background Art

[0002] At present, in the process of automobile body manufacturing, shock-absorbing glue is generally used at the junction of the inner panel reinforcement plate and the outer panel of the car door, rear cover, front engine compartment, and side panel, and on the contact surface between the top beam and the top cover. The cured glue layer has a high bonding strength. After heat expansion, the reinforcement beam and the outer panel are tightly combined into one, replacing the welding point, which can improve the aesthetics of the car body and reduce vibration and noise during driving.

[0003] The volume expansion rate of shock-absorbing glue is an important performance indicator of shock-absorbing glue. During the coating and baking process, the shock-absorbing glue will not only expand due to thermal expansion and contraction of the colloid itself, but also experience volume expansion caused by foaming.

[0004] If the volume expansion rate of the shock-absorbing glue is too high, it can cause deformation of the inner and outer panel parts of the sheet metal. If the volume expansion rate of the shock-absorbing glue is too low, it can cause poor bonding between the shock-absorbing glue and the sheet metal, causing the risk of debonding. Therefore, before applying the shock-absorbing glue, the volume expansion rate of the shock-absorbing glue needs to be measured to ensure that it meets the use requirements. Summary of the invention

[0005] Based on this, it is necessary to provide a test method, test tooling and system for the volume expansion rate of shock-absorbing rubber to address the above technical problems.

[0006] In a first aspect, a method for testing the volume expansion rate of a shock-absorbing adhesive is provided. The method is applied to a system for testing the volume expansion rate of a shock-absorbing adhesive. The system includes a prefabricated testing tool and a thermomechanical analyzer. The method includes:

[0007] Obtaining the initial tooling total height and the initial height of the colloid of the test tooling pre-injected with the shock-absorbing glue to be tested;

[0008] Installing the tester in the sample area of ​​the thermomechanical analyzer;

[0009] Controlling the thermomechanical analyzer to heat the test fixture according to a preset target temperature and a test heating rate;

[0010] Obtain the instantaneous moving distance of the push rod corresponding to each test moment during the heating process;

[0011] For each of the test moments, the volume expansion rate of the shock-absorbing rubber to be tested at the test moment is determined according to the initial tooling total height, the initial height of the colloid and the instantaneous movement distance of the push rod corresponding to the test moment.

[0012] As an optional implementation, the preset target temperature is the actual heating temperature of the shock-absorbing adhesive to be tested during the coating and baking process;

[0013] The test heating rate is the actual heating rate of the part where the shock-absorbing adhesive to be tested is located during the coating and baking process.

[0014] As an optional implementation, the target temperature is 200° C. and the test heating rate is 10° C. / min.

[0015] As an optional implementation, after controlling the thermomechanical analyzer to heat the test fixture according to a preset target temperature and a test heating rate, the method further includes:

[0016] After reaching the target temperature, the test tool is kept warm according to a preset warm-keeping time;

[0017] The test fixture was cooled to room temperature.

[0018] As an optional implementation, for each of the test moments, according to the total height of the initial tooling, the initial height of the colloid and the instantaneous movement distance of the push rod corresponding to the test moment, the formula for determining the volume expansion rate of the shock-absorbing rubber to be tested at the test moment is:

[0019] E tx =D tx L 0 / L 1 ;

[0020] Among them, E tx is the volume expansion rate of the shock-absorbing rubber at the test time tx, D tx is the instantaneous moving distance of the push rod corresponding to the test time tx, L 0 is the total height of the initial tooling, L 1 is the initial height of the colloid.

[0021] As an optional implementation, the initial tooling total height is the total height of the test tooling after the shock-absorbing glue to be tested is added in advance, and the colloid initial height is the initial height of the shock-absorbing glue to be tested in the test tooling.

[0022] In a second aspect, a test tool is provided, the test tool comprising a tool base and a tool piston; wherein:

[0023] The tooling base is used to accommodate the shock-absorbing rubber to be tested;

[0024] The tooling piston is used to press the shock-absorbing rubber to be tested.

[0025] As an optional implementation, the tooling base is made by a quenching and tempering heat treatment process, and the tooling piston is made of a lightweight material.

[0026] In a third aspect, a testing system for the volume expansion rate of a shock-absorbing adhesive is provided, the system comprising a thermomechanical analyzer and a prefabricated testing tool as described in any one of the second aspects, to implement a testing method for the volume expansion rate of a shock-absorbing adhesive as described in any one of the first aspects.

[0027] The present application provides a method, a test tool and a system for testing the volume expansion rate of a shock-absorbing adhesive. The technical solution provided by the embodiments of the present application brings at least the following beneficial effects: the method is applied to a system for testing the volume expansion rate of a shock-absorbing adhesive, the system comprising a pre-made test tool and a thermomechanical analyzer, the method comprising: obtaining an initial tooling total height and an initial height of the colloid of the test tool that is pre-injected with the shock-absorbing adhesive to be tested; placing the test tool in the sample area of ​​the thermomechanical analyzer; controlling the thermomechanical analyzer to heat the test tool according to a preset target temperature and a test heating rate; obtaining the instantaneous movement distance of the push rod corresponding to each test moment during the heating process; for each test moment, determining the volume expansion rate of the shock-absorbing adhesive to be tested at the test moment according to the initial tooling total height, the initial height of the colloid and the instantaneous movement distance of the push rod corresponding to the test moment. This application uses a self-made test tool and cooperates with a thermal mechanical analyzer to obtain the volume expansion rate of the shock-absorbing glue at each test moment during the heating process of the shock-absorbing glue, which can be used to guide the design of the amount and height of the shock-absorbing glue on the car body, reducing the cost waste caused by excessive glue coating and the risk of debonding of the inner and outer panels caused by insufficient glue coating.

[0028] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1a A schematic diagram of the structure of a system for testing the volume expansion rate of a shock-absorbing adhesive provided in an embodiment of the present application;

[0031] Figure 1b A schematic diagram of an example of a system for testing the volume expansion rate of a shock-absorbing adhesive provided in an embodiment of the present application;

[0032] Figure 2A flow chart of a method for testing the volume expansion rate of a shock-absorbing adhesive provided in an embodiment of the present application;

[0033] Figure 3 A schematic diagram of the structure of a test tool provided in an embodiment of the present application. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0035] The method for testing the volume expansion rate of the shock-absorbing adhesive provided in the embodiment of the present application can be applied to a system for testing the volume expansion rate of the shock-absorbing adhesive. Figure 1a As shown, the test system includes a prefabricated test fixture 110 and a thermomechanical analyzer 120 .

[0036] The following will describe in detail a method for testing the volume expansion rate of a shock-absorbing adhesive provided in an embodiment of the present application in conjunction with a specific implementation method. Figure 2 A flow chart of a method for testing the volume expansion rate of a shock-absorbing adhesive provided in an embodiment of the present application, such as Figure 2 As shown, the specific steps are as follows:

[0037] Step 201 , obtaining an initial tooling total height and an initial height of the colloid of a test tooling pre-injected with the shock-absorbing glue to be tested.

[0038] During implementation, the technician may inject the shock-absorbing glue to be tested into the test tooling through equipment such as a glue gun in advance. Figure 3 A schematic diagram of the structure of a test tool provided in an embodiment of the present application, specifically, the shock-absorbing glue 330 to be tested can be directly injected into the tool base 310, and the height of the shock-absorbing glue 330 to be tested can be controlled by the tool piston 320 to be added at a preset height (such as 9mm to 13mm). During the injection process, a certain amount of shock-absorbing glue 330 to be tested can be added compared to the preset injection amount. The excess shock-absorbing glue 330 to be tested can be squeezed out of the base hole 3101 of the tool base 310 by the tool piston 320, but it cannot be too much, otherwise after the shock-absorbing glue 330 to be tested expands and foams, if the tool piston 320 is completely pushed out of the effective range of the tool base 310, it will cause the piston to fall off, resulting in measurement failure. At the same time, the upper cover part of the tool piston 320 can be provided with friction lines, thereby increasing the friction of subsequent tests. After the injection is completed, the initial tool total height and the initial height of the colloid of the test tool can be measured.

[0039] As an optional implementation, the initial total height of the test tooling is the total height of the test tooling after the shock-absorbing glue to be tested is added in advance, and the initial height of the colloid is the initial height of the shock-absorbing glue to be tested in the test tooling.

[0040] In implementation, Figure 3 As shown, the total height of the initial tooling is the total height of the test tooling after the shock-absorbing glue 330 to be tested is added in advance, that is, the total height from the bottom of the tooling base 310 to the upper cover of the tooling piston 320, which can be recorded as L 0 The initial height of the colloid is the initial height of the shock-absorbing rubber 330 to be tested in the test fixture, which can be recorded as L 1 .

[0041] Step 202: Install the test tool in the sample area of ​​the thermomechanical analyzer.

[0042] In implementation, Figure 1b This is a schematic diagram of an example of a system for testing the volume expansion rate of a shock-absorbing adhesive provided in an embodiment of the present application. Figure 1b As shown, the main body is a thermomechanical analyzer 120, which is composed of a displacement sensor 1201, a sample area 1202, a push rod 1203, and a heating chamber 1204. Before testing, the test fixture 110 can be placed in the sample area 1202 of the thermomechanical analyzer 120. Before testing, ensure that the test fixture 110 is in good contact with the sample area 1202 so as to accurately measure the thermal expansion behavior.

[0043] Step 203 , controlling the thermomechanical analyzer to heat the test fixture according to the preset target temperature and test heating rate.

[0044] In implementation, Figure 1b As shown, the sample area 1202 with the test tool 110 is set inside the heating chamber 1204, and the test system can control the heating chamber 1204 to heat the test tool in the sample area 1202 according to the preset target temperature and test heating rate.

[0045] As an optional implementation manner, after step 203, the method further includes:

[0046] After reaching the target temperature, the test tooling is kept warm according to the preset warm-keeping time;

[0047] Allow the test fixture to cool to room temperature.

[0048] In practice, the preset insulation time is maintained at the target temperature to allow the shock-absorbing adhesive to reach thermal equilibrium. During the insulation process, the dimensional changes of the shock-absorbing adhesive to be tested can also be recorded by a thermal mechanical analyzer to obtain the change trend of the volume expansion rate of the shock-absorbing adhesive over time. After the insulation is completed, the heating is stopped and the test fixture is cooled according to the control settings. When cooling to room temperature, ensure that the cooling rate is uniform to avoid additional stress or uneven expansion caused by temperature gradients.

[0049] As an optional implementation, the preset target temperature is the actual heating temperature of the shock-absorbing adhesive to be tested during the coating and baking process;

[0050] The test heating rate is the actual heating rate of the part where the shock-absorbing adhesive to be tested is located during the coating and baking process.

[0051] In practice, the target temperature is set based on the highest heating temperature experienced by the shock-absorbing adhesive to be tested during actual use during the coating and baking process of the actual vehicle manufacturing process. By monitoring the temperature of the coating and baking process or recording the process parameters, the heating temperature range of the parts where the shock-absorbing adhesive is located in the baking environment is determined, and the highest value is taken as the target temperature. The test heating rate is based on the actual heating rate of the parts where the shock-absorbing adhesive is located in the coating and baking process. The rate can be obtained by measuring the curve of the surface temperature of the part over time using a thermocouple or an infrared thermometer, and the slope of the heating stage is taken as the set value. The test process should simulate the environment in which the shock-absorbing adhesive is heated in actual working conditions to ensure that the experimental conditions are consistent with the process conditions, so as to evaluate whether the thermal stability and expansion characteristics of the shock-absorbing adhesive to be tested meet the design requirements, and provide a scientific basis for the performance optimization of the shock-absorbing adhesive material.

[0052] As an optional implementation, the target temperature is 200° C. and the test heating rate is 10° C. / min.

[0053] Step 204, obtaining the instantaneous movement distance of the push rod corresponding to each test moment during the heating process.

[0054] In practice, the instantaneous movement distance of the push rod at each test moment during the heating process can be recorded in real time through the measurement function of the thermomechanical analyzer. Specifically: start the thermomechanical analyzer and calibrate the initial position of the push rod to ensure that its zero point is accurate, and record the data of the push rod movement distance changing over time during the test. The instantaneous movement distance of the push rod changes with the expansion of the sample. Therefore, by obtaining the instantaneous movement distance of the push rod corresponding to each test moment during the heating process, the size change of the expansion glue to be tested can be recorded in real time. Table 1 is the expansion data of a shock-absorbing glue to be tested provided in an embodiment of the present application, as shown in Table 1:

[0055] Table 1

[0056] Temperature / ℃ Test time tx <![CDATA[Instantaneous movement distance D of the push rod tx > 25.00800 0.00000 2.403859E-6 25.26200 0.25000 2.316972E-6 26.65200 0.50000 3.618557E-6 29.06000 0.75000 7.674052E-6 31.82500 1.00000 1.521738E-5 34.56500 1.25000 2.559172E-5 37.32200 1.50000 3.991804E-5 40.20200 1.75000 5.427110E-5 43.06300 2.00000 7.177434E-5 45.86800 2.25000 9.157035E-5 48.61800 2.50000 1.120878E-4 … … …

[0057] As an optional implementation, if there is fluctuation or noise in the collected data, it can be processed by a smoothing algorithm (such as moving average).

[0058] Step 205 , for each test moment, the volume expansion rate of the shock-absorbing rubber to be tested at the test moment is determined according to the initial tooling total height, the initial height of the colloid and the instantaneous movement distance of the push rod corresponding to the test moment.

[0059] During implementation, for each test moment, the test system can determine the volume expansion rate of the shock-absorbing rubber to be tested at the test moment based on the initial tooling total height, the initial height of the colloid and the instantaneous movement distance of the push rod corresponding to the test moment.

[0060] As an optional implementation, in step 205, for each test moment, according to the total height of the initial tooling, the initial height of the colloid, and the instantaneous movement distance of the push rod corresponding to the test moment, the formula for determining the volume expansion rate of the shock-absorbing rubber to be tested at the test moment is:

[0061] E tx =D tx L 0 / L 1 ;

[0062] Among them, E tx is the volume expansion rate of the shock-absorbing rubber at the test time tx, D tx is the instantaneous moving distance of the push rod corresponding to the test time tx, L 0 is the total height of the initial tooling, L 1 is the initial height of the colloid.

[0063] In practice, Table 2 is the expansion data of another shock-absorbing rubber to be tested provided in the embodiment of the present application, as shown in Table 2:

[0064] Table 2

[0065] Temperature / ℃ Test time tx <![CDATA[Instantaneous moving distance D of the push rod tx > <![CDATA[Volume expansion rate E of the damping rubber tx > 25.00800 0.00000 2.403859E-6 0.00％ 25.26200 0.25000 2.316972E-6 0.00％ 26.65200 0.50000 3.618557E-6 0.00％ 29.06000 0.75000 7.674052E-6 0.00％ 31.82500 1.00000 1.521738E-5 0.00％ 34.56500 1.25000 2.559172E-5 0.01％ 37.32200 1.50000 3.991804E-5 0.01％ 40.20200 1.75000 5.427110E-5 0.01％ 43.06300 2.00000 7.177434E-5 0.01％ 45.86800 2.25000 9.157035E-5 0.02％ 48.61800 2.50000 1.120878E-4 0.02％ … … … …

[0066] The test system can determine the volume expansion rate of the shock-absorbing rubber to be tested at each test time according to the initial tooling total height, the initial height of the colloid and the instantaneous movement distance of the push rod corresponding to each test time, and obtain the corresponding relationship between the volume expansion rate of the shock-absorbing rubber and the temperature.

[0067] The embodiment of the present application provides a method for testing the volume expansion rate of shock-absorbing glue, and the method is applied to a testing system for the volume expansion rate of shock-absorbing glue. The system includes a pre-made test fixture and a thermomechanical analyzer, and the method includes: obtaining the initial total height of the test fixture and the initial height of the colloid of the test fixture pre-injected with the shock-absorbing glue to be tested; placing the test fixture in the sample area of ​​the thermomechanical analyzer; controlling the thermomechanical analyzer to heat the test fixture according to the preset target temperature and the test heating rate; obtaining the instantaneous movement distance of the push rod corresponding to each test moment during the heating process; for each test moment, according to the initial total height of the fixture, the initial height of the colloid and the instantaneous movement distance of the push rod corresponding to the test moment, determine the volume expansion rate of the shock-absorbing glue to be tested at the test moment. The present application uses a self-made test fixture and cooperates with a thermomechanical analyzer to obtain the volume expansion rate of the shock-absorbing glue at each test moment during the heating process of the shock-absorbing glue, which can be used to guide the design of the amount and height of the shock-absorbing glue applied on the vehicle body, and reduce the cost waste caused by excessive glue application and the risk of debonding of the inner and outer panels caused by insufficient glue application.

[0068] It should be understood that although Figure 2 The steps in the flowchart are shown in sequence as indicated by the arrows, but these steps are not necessarily executed in the order indicated by the arrows. Unless otherwise specified in this document, there is no strict order restriction for the execution of these steps, and these steps can be executed in other orders. Moreover, Figure 2 At least a part of the steps in the method may include multiple steps or multiple stages, and these steps or stages are not necessarily executed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be executed in turn or alternately with other steps or at least a part of the steps or stages in other steps. It can be understood that the same / similar parts between the various embodiments of the above method in this specification can refer to each other, and each embodiment focuses on the differences from other embodiments. For related parts, refer to the description of other method embodiments.

[0069] The present application also provides a test tool, such as Figure 3 As shown, the test tool includes a tool base 310 and a tool piston 320; wherein,

[0070] A tooling base 310, used to accommodate the shock-absorbing rubber 330 to be tested;

[0071] The tooling piston 320 is used to press the shock-absorbing rubber 330 to be tested.

[0072] As an optional implementation, the tooling base 310 is made by a quenching and tempering heat treatment process, and the tooling piston 320 is made of a lightweight material.

[0073] In practice, the tooling base 310 can be made of 40Cr material, and after being machined to the design size, it is subjected to quenching and tempering heat treatment, and the specific parameters are as follows: heating temperature 840-860℃, heat preservation 10min, quenching and cooling to room temperature after being taken out of the furnace, quenching medium water, and then heating and tempering at 520℃, quenching and cooling to room temperature after being taken out of the furnace, quenching medium water. The tooling piston 320 can be cut and processed to the design size using 7075 aviation-grade aluminum profiles, thereby obtaining a lightweight tooling piston 320, so that the shock-absorbing rubber to be tested can overcome the influence of the self-weight of the tooling piston 320 on the expansion of the shock-absorbing rubber to be tested as little as possible during the expansion process.

[0074] For the specific definition of the test system for the volume expansion rate of shock-absorbing glue, please refer to the definition of the test method for the volume expansion rate of shock-absorbing glue mentioned above, which will not be repeated here. Each module in the above-mentioned test system for the volume expansion rate of shock-absorbing glue can be implemented in whole or in part through software, hardware and their combination. The above-mentioned modules can be embedded in or independent of the processor in the computer device in the form of hardware, or can be stored in the memory of the computer device in the form of software, so that the processor can call and execute the operations corresponding to the above modules.

[0075] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0076] It should also be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for display, data for analysis, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties.

[0077] Each embodiment in this specification is described in a related manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0078] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0079] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

Claims

1. A method for testing the volume expansion rate of a shock-absorbing rubber, characterized in that: The method is applied to a test system for the volume expansion rate of a shock-absorbing rubber, the system comprising a prefabricated test fixture and a thermomechanical analyzer, and the method comprises: Obtaining the initial tooling total height and the initial height of the colloid of the test tooling pre-injected with the shock-absorbing glue to be tested; Installing the tester in the sample area of ​​the thermomechanical analyzer; Controlling the thermomechanical analyzer to heat the test fixture according to a preset target temperature and a test heating rate; Obtain the instantaneous moving distance of the push rod corresponding to each test moment during the heating process; For each of the test moments, the volume expansion rate of the shock-absorbing rubber to be tested at the test moment is determined according to the initial tooling total height, the initial height of the colloid and the instantaneous movement distance of the push rod corresponding to the test moment.

2. The method according to claim 1, characterized in that The preset target temperature is the actual heating temperature of the shock-absorbing rubber to be tested during the coating and baking process; The test heating rate is the actual heating rate of the part where the shock-absorbing adhesive to be tested is located during the coating and baking process.

3. The method according to claim 2, characterized in that The target temperature is 200°C, and the test heating rate is 10°C / min.

4. The method according to claim 1, characterized in that: After controlling the thermomechanical analyzer to heat the test fixture according to the preset target temperature and the test heating rate, the method further includes: After reaching the target temperature, the test tool is kept warm according to a preset warm-keeping time; The test fixture was cooled to room temperature.

5. The method according to claim 1, characterized in that For each of the test moments, according to the total height of the initial tooling, the initial height of the colloid and the instantaneous movement distance of the push rod corresponding to the test moment, the formula for determining the volume expansion rate of the shock-absorbing rubber to be tested at the test moment is: E tx =D tx L0 / L1; Among them, E tx is the volume expansion rate of the shock-absorbing rubber at the test time tx, D tx is the instantaneous moving distance of the push rod corresponding to the test time tx, L0 is the total height of the initial tooling, and L1 is the initial height of the colloid.

6. The method according to claim 5, characterized in that The initial tooling total height is the total height of the test tooling after the shock-absorbing glue to be tested is added in advance, and the colloid initial height is the initial height of the shock-absorbing glue to be tested in the test tooling.

7. A test tool, characterized in that: The test fixture comprises a fixture base and a fixture piston; wherein, The tooling base is used to accommodate the shock-absorbing rubber to be tested; The tooling piston is used to press the shock-absorbing rubber to be tested.

8. The test tool according to claim 7, characterized in that: The tooling base is made by a quenching and tempering heat treatment process, and the tooling piston is made of a lightweight material.

9. A system for testing the volume expansion rate of shock-absorbing rubber, characterized in that: The system comprises a thermomechanical analyzer and a prefabricated test fixture as described in any one of claims 7 or 8, and implements the test method for the volume expansion rate of the shock-absorbing glue as described in any one of claims 1-6.

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