Bonding force testing device

Abstract

The utility model discloses a bonding force testing device. The bonding force testing device comprises a force applying assembly, a testing assembly and a control piece, the force application assembly comprises a servo motor and a metal rod which is driven by the servo motor to press downwards; the metal rod is used for downwards pressing a preset position of a colloid in the test piece; the test assembly comprises a telescopic rod, a rotating shaft piece and a thin plate; the thin plate is rotatably mounted on the telescopic rod through the rotating shaft piece; the thin plate is arranged at the joint of the colloid and the shell in the test piece; the control piece is used for controlling the servo motor and can calculate the bonding force between the colloid and the shell according to the downward pressure of the metal rod. In the device, the force application assembly is matched with the test assembly to obtain the downward pressure at the moment of stripping the colloid from the shell, so that the control piece can calculate the bonding force between the colloid and the shell according to the downward pressure; meanwhile, only downward pressure is applied to the colloid during testing, and irreversible damage to a test piece is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of testing potting parts, and more specifically to an adhesion testing device. Background Art

[0002] With the rapid development of the industrial field, the use environment of automotive electronic products is becoming increasingly harsh, and higher requirements are also put forward for the sealing protection level of potting parts. At present, the test method for the adhesion between the potting glue and the shell in the potting parts mainly adopts the pull-out force test method. The test method is as follows: Figure 1 When testing the bonding strength, this method requires destructively cutting the shell 12 and the colloid 11, and then using a tensile machine to peel off the cut shell 12 and the colloid 11, and measuring the pull-out force value at the moment of peeling, which is the bonding strength.

[0003] However, the above test method requires cutting and destroying the test piece, causing irreversible damage to the test piece, and the test piece cannot be used again after the test.

[0004] Therefore, how to measure the adhesion between the potting body and the housing without damaging the test piece so that the test piece can be used normally after the test is completed is an urgent problem to be solved by those skilled in the art. Utility Model Content

[0005] In view of this, the utility model provides an adhesion testing device, whose force-applying component cooperates with the testing component to obtain the downward pressure at the moment when the colloid and the shell are peeled off, so that the control component can calculate the adhesion between the colloid and the shell according to the downward pressure; at the same time, the device only needs to apply downward pressure to the colloid during the test, and will not cause irreversible damage to the test piece, so that the test piece can be used normally after the test.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] An adhesion testing device, comprising:

[0008] A force-applying assembly, the force-applying assembly comprising a servo motor and a metal rod driven downward by the servo motor; the metal rod is used to apply downward pressure to a preset position of the colloid in the test piece;

[0009] A test assembly, the test assembly comprising a telescopic rod, a rotating shaft and a thin plate; the thin plate is rotatably mounted on the telescopic rod through the rotating shaft; the thin plate is used to be arranged at the connection between the colloid and the shell in the test piece;

[0010] A control component is used to control the servo motor and can calculate the bonding force between the colloid and the shell according to the downward pressure of the metal rod.

[0011] Optionally, the above-mentioned adhesion testing device further includes a bracket, and the servo motor is installed on the bracket; the telescopic rod is installed on the bracket or the servo motor.

[0012] Optionally, in the above-mentioned adhesion testing device, the bracket includes a chassis, a vertical support member installed on the chassis, and a transverse support member fixed to the top of the vertical support member; the chassis is used to place the test piece; and the servo motor is installed on the transverse support member.

[0013] Optionally, in the above-mentioned adhesion testing device, the chassis and the transverse support member are fixedly connected to the vertical support member through their respective ends; the chassis and the transverse support member are located on the same side of the vertical support member.

[0014] Optionally, in the above-mentioned adhesion testing device, the metal rod is connected to the servo motor through a connecting rod.

[0015] Optionally, in the above-mentioned adhesion testing device, the connecting rod includes two vertical connecting rods arranged in parallel and a transverse connecting rod connected to the lower ends of the two vertical connecting rods; and the metal rod is fixed to the middle part of the transverse connecting rod.

[0016] Optionally, in the above-mentioned adhesion testing device, the metal rod is used to gradually increase the downward pressure under the driving action of the servo motor, and can maintain a preset time at each different applied pressure value.

[0017] Optionally, in the above-mentioned adhesion testing device, the preset time is 10s.

[0018] Optionally, in the above-mentioned adhesion testing device, the preset position is a position in the colloid that is 0.5 mm-1 mm away from the connection between the colloid and the shell.

[0019] Optionally, in the above-mentioned adhesion testing device, the control component includes:

[0020] A control module, wherein the control module is used to control the servo motor;

[0021] A calculation module is used to calculate the adhesive force between the colloid and the shell according to the downward pressure of the metal rod when the thin plate begins to be able to be inserted into the gap between the colloid and the shell.

[0022] The utility model provides an adhesion test device, comprising a force-applying component, a test component and a control component; the force-applying component comprises a servo motor and a metal rod driven downward by the servo motor; the metal rod is used to apply downward pressure to a preset position of a colloid in a test piece; the test component comprises a telescopic rod, a rotating shaft component and a thin plate; the thin plate is rotatably mounted on the telescopic rod through the rotating shaft component; the thin plate is used to be arranged at the connection between the colloid and the shell in the test piece; the control component is used to control the servo motor, and can calculate the adhesion between the colloid and the shell according to the downward pressure of the metal rod when the thin plate begins to be able to be inserted into the gap between the colloid and the shell.

[0023] When using the above-mentioned adhesion test device, the thin plate is gently pressed against the connection between the colloid and the shell in the test piece, and the thin plate is supported by the upper surface of the colloid; then the control component controls the servo motor to drive the metal rod to press down the preset position of the colloid in the test piece, and the downward pressure is gradually increased until the thin plate begins to be able to insert into the gap between the colloid and the shell. The computer calculates the adhesion between the colloid and the shell based on the downward pressure applied by the metal rod to the colloid at this time.

[0024] Obviously, in the above-mentioned adhesion testing device, the force-applying component and the testing component can obtain the downward pressure at the moment when the colloid and the shell are peeled off, so that the control component can calculate the adhesion between the colloid and the shell according to the downward pressure; at the same time, the device only needs to apply downward pressure to the colloid during the test, and will not cause irreversible damage to the test piece, so that the test piece can be used normally after the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the utility model 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 utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 It is a process diagram of testing the bonding strength of the potting glue in the potting part by using the pull-out force test method in the prior art;

[0027] Figure 2 A schematic diagram of the structure of an adhesion testing device provided in an embodiment of the utility model;

[0028] Figure 3 A process diagram of testing the adhesion of the adhesion test device provided in the embodiment of the utility model;

[0029] in, Figure 2-Figure 3 middle:

[0030] Bracket 101; lateral support member 111; vertical support member 112; chassis 113; servo motor 102; connecting rod 103; vertical connecting rod 131; lateral connecting rod 132; mounting seat 133; metal rod 104; test assembly 105; rotating shaft member 151; thin plate 152; telescopic rod 153; control member 106;

[0031] Colloid 201; shell 202. DETAILED DESCRIPTION

[0032] The embodiment of the utility model discloses an adhesion testing device, wherein a force-applying component cooperates with a testing component to obtain downward pressure at the moment when a colloid and a shell are peeled off, so that a control component can calculate the adhesion between the colloid and the shell according to the downward pressure; at the same time, the device only needs to apply downward pressure to the colloid during the test, and will not cause irreversible damage to the test piece, so that the test piece can be used normally after the test.

[0033] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0034] See also Figure 2-3 The embodiment of the utility model provides an adhesion testing device, including a force-applying component, a test component 105 and a control component 106; the force-applying component includes a servo motor 102 and a metal rod 104 driven downward by the servo motor 102; the metal rod 104 is used to apply downward pressure to a preset position of a colloid 201 in a test piece; the test component 105 includes a telescopic rod 153, a rotating shaft 151 and a thin plate 152; the thin plate 152 is rotatably mounted on the telescopic rod 153 through the rotating shaft 151; the thin plate 152 is used to be arranged at the connection between the colloid 201 and the shell 202 in the test piece; the control component 106 is used to control the servo motor 102, and can calculate the adhesion between the colloid 201 and the shell 202 according to the downward pressure of the metal rod 104 when the thin plate 152 begins to be able to insert into the gap between the colloid 201 and the shell 202.

[0035] When the above-mentioned adhesion test device is used, the thin plate 152 is lightly pressed against the connection between the colloid 201 and the shell 202 in the test piece, and the thin plate 152 is supported by the upper surface of the colloid 201; then the control component 106 controls the servo motor 102 to drive the metal rod 104 to press down the preset position of the colloid 201 in the test piece, and the downward pressure is gradually increased until the thin plate 152 begins to be able to insert into the gap between the colloid 201 and the shell 202, and the computer calculates the adhesion between the colloid 201 and the shell 202 according to the downward pressure applied by the metal rod 104 to the colloid 201 at this time.

[0036] Obviously, in the above-mentioned adhesion testing device, the force-applying component cooperates with the testing component 105 to obtain the downward pressure at the moment when the colloid 201 and the shell 202 are peeled off, so that the control component 106 can calculate the adhesion between the colloid 201 and the shell 202 according to the downward pressure; at the same time, the device only needs to apply downward pressure to the colloid 201 during the test, and will not cause irreversible damage to the test piece, so that the test piece can be used normally after the test.

[0037] In addition, in the above-mentioned adhesion test device, the test assembly 105 includes a telescopic rod 153, the length of which can be changed, and a thin plate 152 is connected to the telescopic rod 153 through a rotating shaft 151, and the angle of the thin plate 152 can be changed; the two aspects act simultaneously, and before the metal rod 104 applies downward pressure to the preset position of the colloid 201, the thin plate 152 can be adjusted to be just above the colloid 201 in the test piece, and the thin plate 152 is not affected by the supporting force of the telescopic rod 153 at this time, and only the upper surface of the colloid 201 provides an upward force to support the thin plate 152. The thin plate 152 can be set as a metal thin plate.

[0038] Furthermore, after using the adhesion test device provided in this embodiment, there is no need to apply a pulling force to the cut portion of the shell and the colloid in the test piece, thereby avoiding the problem of no pulling force attachment position and inconvenient operation. At the same time, there is no need to cut the test piece, thereby preventing the adhesion between the colloid and the shell from being damaged during the cutting process, thereby affecting the accuracy of the final test result.

[0039] The above-mentioned adhesion testing device further includes a bracket 101 , and a servo motor 102 is installed on the bracket 101 ; and a telescopic rod 153 is installed on the bracket 101 or the servo motor 102 .

[0040] In one embodiment, the bracket 101 includes a chassis 113 , a vertical support member 112 mounted on the chassis 113 , and a transverse support member 111 fixed to the top of the vertical support member 112 ; the chassis 113 is used to place the test piece; and the servo motor 102 is mounted on the transverse support member 111 .

[0041] like Figure 2As shown, the chassis 113 and the transverse support member 111 are fixedly connected to the vertical support member 112 through their respective ends; the chassis 113 and the transverse support member 111 are located on the same side of the vertical support member 112.

[0042] In one embodiment, the metal rod 104 is connected to the servo motor 102 via a connecting rod 103 .

[0043] The connecting rod 103 may be configured to include two parallel vertical connecting rods 131 and a transverse connecting rod 132 connected to the lower ends of the two vertical connecting rods 131; the metal rod 104 is fixed to the middle of the transverse connecting rod 132. The middle of the transverse connecting rod 132 may also be fixed with a mounting seat 133 for assembling the metal rod 104.

[0044] In the technical solution provided in this embodiment, the connecting rod includes two vertical connecting rods 131, which can simultaneously apply the same force to the metal rod 104 through the transverse connecting rod 132, so that the metal rod 104 is evenly stressed and ensures that the metal rod 104 applies a downward force to the colloid 201 in the vertical direction.

[0045] The metal rod 104 is used to gradually increase the downward pressure under the driving action of the servo motor 102, and can maintain a preset time at each different pressure value applied. The preset time can be set to 10s.

[0046] The preset position may be set to a position in the colloid 201 that is 0.5 mm to 1 mm away from the connection between the colloid 201 and the housing 202 .

[0047] The control element 106 includes:

[0048] A control module, the control module is used to control the servo motor 102;

[0049] A calculation module is used to calculate the adhesive force between the colloid 201 and the shell 202 according to the downward pressure of the metal rod 104 when the thin plate 152 begins to be inserted into the gap between the colloid 201 and the shell 202 .

[0050] The above-mentioned adhesion test device is suitable for measuring the adhesion of potting glue with a hardness of Shore A level and an elastic modulus less than 5MPa. For the potting part to be tested, it is necessary to ensure that the colloid 201 has been fully cured, the potting surface is flat and crack-free, and there is no impurity or dust on the surface of the colloid 201.

[0051] The following is combined with Figure 3 The application process of the adhesion testing device provided in this embodiment is introduced:

[0052] The distance between the position of the metal rod 104 pressing the colloid 201 and the shell 202 is 0.5mm-1mm. Before pressing down, first gently press the hard metal sheet 152 against the top of the colloid 201 at the edge of the shell 202 in the vertical direction, and then apply the downward pressure. The downward pressure of the metal rod 104 is gradually increased by a value of 0.1N, and different pressure values ​​are kept for 10 seconds respectively. The control part 106 records the downward pressure and the pressing depth in real time. When the metal sheet 152 just begins to be inserted into the gap between the colloid 201 and the shell 202, it is determined that the colloid 201 and the shell 202 are in a state of being about to be debonded. The control part 206 calculates according to the downward pressure in the state of the colloid 201 and the shell 202 being about to be debonded, the length of the metal rod 104 from the edge of the shell 202 and the pressing depth, so as to obtain the bonding force between the colloid 201 and the shell 202 in the tested potting part. The principles of mechanical analysis on which intelligent computing systems are based are as follows: Figure 3 shown.

[0053] The mechanical analysis method performed by the control unit 106 is divided into the following steps: (1) The control unit 106 records the pressing depth H and the pressing force F. 下压 ; Use a ruler to measure the distance L between the metal rod 104 and the edge of the shell 202. The angle α between the surface of the colloid 201 at the concave part and the horizontal plane can be calculated by trigonometric function, that is, tanα=H / L; (2) Due to the downward pressure, the colloid at the pressing position will be subjected to two forces of equal magnitude and opposite direction, and the angle between them and the horizontal plane is α, namely F1 and F2; (3) Through the vertical force analysis, it can be known that F1sinα+F2sinα=F 下压 (4) Through the horizontal force analysis of the bonding position between the housing 202 and the colloid 201, it can be seen that F1cosα=F 粘 , where F 粘 is the bonding force between the housing 202 and the colloid 201. Finally, through mathematical calculation, the expression of the bonding force can be obtained as F 粘 =(F 下压 ×L) / (2H).

[0054] The adhesion test device provided by the embodiment of the utility model is simple and quick to operate, and is non-destructive to the test piece. In addition, the device provided by the embodiment has a compact structure, a small volume, and high relative position accuracy of each component, high control accuracy of the downward pressure, and high accuracy of the test result.

[0055] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0056] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An adhesion testing device, characterized in that: include: A force-applying assembly, the force-applying assembly comprising a servo motor and a metal rod driven downward by the servo motor; The metal rod is used to apply downward pressure to a preset position of the colloid in the test piece; A test assembly, the test assembly comprising a telescopic rod, a rotating shaft and a thin plate; The thin plate is rotatably mounted on the telescopic rod through a rotating shaft; the thin plate is used to be arranged at the connection between the colloid and the shell in the test piece; A control component is used to control the servo motor and can calculate the bonding force between the colloid and the shell according to the downward pressure of the metal rod.

2. The adhesion testing device according to claim 1, characterized in that: It also includes a bracket, and the servo motor is installed on the bracket; the telescopic rod is installed on the bracket or the servo motor.

3. The adhesion testing device according to claim 2, characterized in that: The bracket includes a chassis, a vertical support member installed on the chassis, and a transverse support member fixed to the top of the vertical support member; the chassis is used to place the test piece; and the servo motor is installed on the transverse support member.

4. The adhesion testing device according to claim 3, characterized in that: The chassis and the transverse support member are fixedly connected to the vertical support member through their respective ends; the chassis and the transverse support member are located on the same side of the vertical support member.

5. The adhesion testing device according to claim 1, characterized in that: The metal rod is connected to the servo motor through a connecting rod.

6. The adhesion testing device according to claim 5, characterized in that: The connecting rod comprises two vertical connecting rods arranged in parallel and a transverse connecting rod connected to the lower ends of the two vertical connecting rods; the metal rod is fixed to the middle part of the transverse connecting rod.

7. The adhesion testing device according to claim 1 or 5, characterized in that: The metal rod is used to gradually increase the downward pressure under the driving action of the servo motor, and can maintain a preset time at each different pressure value applied.

8. The adhesion testing device according to claim 7, characterized in that: The preset time is 10s.

9. The adhesion testing device according to claim 1, characterized in that: The preset position is a position in the colloid that is 0.5 mm to 1 mm away from the connection between the colloid and the shell.

10. The adhesion testing device according to claim 1, characterized in that: The control element comprises: A control module, wherein the control module is used to control the servo motor; A calculation module is used to calculate the adhesive force between the colloid and the shell according to the downward pressure of the metal rod when the thin plate begins to be able to be inserted into the gap between the colloid and the shell.

Images