A kind of inner glueing strength testing tester of automatic butt joint of clamp head

Abstract

This invention discloses an internal adhesive strength testing machine with automatic clamp head docking, comprising a worktable; a tensile assembly disposed on the surface of the worktable; two clamping seats respectively installed in the worktable and the tensile assembly, with metal clamp heads attached to the adjacent sides of the two clamping seats. Each metal clamp head includes a head and a tail, which are detachably connected, and the opposite sides of the two tails are bonded to the specimen; a rotating assembly with its rotating end extending out of the surface of the worktable; and several positioning clamping assemblies installed on the rotating end of the rotating assembly extending out of the worktable. Under the action of the several positioning clamping assemblies extending and closing along the head-tail direction, the circumference of the specimen is squeezed and clamped. This testing machine can automatically dock the metal clamp head with the testing machine and automatically separate the metal clamp head from the specimen without manual installation and disassembly, thereby improving the efficiency of the entire testing process.

Description

Technical Field

[0001] This invention relates to the technical field of measuring tools for internal bonding strength, specifically an internal bonding strength testing machine with automatic card head docking. Background Technology

[0002] Internal bond strength is the test of the tensile strength of a sheet metal specimen when subjected to a uniformly distributed tensile force until failure. The equipment used for this test is a universal testing machine. During the test, the specimen needs to be pre-connected to the metal clip with hot melt adhesive or epoxy resin. After balancing, the testing machine applies a tensile force perpendicular to the surface of the specimen through the clamps, thereby realizing the test of internal bond strength.

[0003] Currently, the metal clips in existing testing machines are usually a single piece. Once the metal clips are glued to the specimen, the two are difficult to separate. After the experiment, they need to be separated manually, which takes a long time. During the separation process, it is impossible to ensure that the hot melt adhesive or epoxy resin on the metal clips is completely removed. Residual hot melt adhesive or epoxy resin will interfere with the adhesion between the next specimen and the metal clips, thus affecting the experimental results.

[0004] Furthermore, if there are a large number of test specimens, more metal clips in normal test condition are required, which also consumes experimental equipment materials. When conducting multiple tests, the metal clips generally need to be manually connected to the testing machine, and after the test, the metal clips need to be manually separated from the testing machine. The installation and disassembly take a lot of time, and the manual operation will affect the experimental progress. In addition, during the installation and disassembly process, hot melt adhesive or epoxy resin adhesive can easily stick to the operator's hands, causing injury to the operator.

[0005] In summary, the existing universal testing still has technical problems that affect the experimental efficiency of multi-sample testing because the metal clip is not easy to separate from the specimen and the metal clip needs to be manually connected to the testing machine. Summary of the Invention

[0006] The purpose of this invention is to provide an internal adhesive strength testing machine with automatic clamping of clamp heads, so as to solve the technical problem that the universal test in the existing device is affected by the difficulty in separating the metal clamp head from the specimen and the need for manual clamping between the metal clamp head and the testing machine, which affects the experimental efficiency of testing multiple specimens.

[0007] To solve the above-mentioned technical problems, the present invention specifically provides the following technical solution:

[0008] A test machine for testing the internal adhesive strength of card heads with automatic mating, comprising,

[0009] A workbench used to hold test specimens for testing;

[0010] A stretching assembly is disposed on the surface of the worktable and can reciprocate and extend along the vertical direction of the worktable under the action of driving force.

[0011] Two clamping seats are respectively installed in the worktable and the stretching assembly. A metal clip is attached to the side of the two clamping seats that are close to each other. The metal clip includes a head and a tail, which are detachably connected. The opposite sides of the two heads and tails are bonded to the specimen.

[0012] A rotating assembly is embedded in the inner cavity of the worktable, and the rotating end of the rotating assembly extends out of the surface of the worktable. Under the action of an external driving force, the rotating end of the rotating assembly can rotate circumferentially along the clamping seat on the worktable.

[0013] Several positioning and clamping components are installed on one end of the rotating component that extends out of the worktable surface. Under the action of the several positioning and clamping components extending and closing along the head-to-tail direction, the circumference of the specimen is squeezed and clamped so that the head and tail attached to the specimen can be directly facing the head and body.

[0014] The rotating component, under the rotational force of the rotating component, causes the specimen, which is clamped and fixed by several positioning clamping components, to rotate synchronously. In conjunction with the downward pressure of the stretching component, the two heads and tails attached to the specimen automatically align and fix with their corresponding bodies. Under the reverse rotational force of the rotating component, the specimen, which is clamped and fixed by several positioning clamping components, rotates synchronously. In conjunction with the upward movement of the stretching component, the two heads and tails attached to the specimen automatically separate from their corresponding bodies.

[0015] As a preferred embodiment of the present invention, the cross-section of the head body is T-shaped, the cross-section of the head tail is rectangular, the head body and the head tail are connected to form an "I" shaped clamp, the protruding end of the head body is provided with a threaded post, and the surface of the head tail is provided with a threaded groove for the threaded post to engage and connect, so as to facilitate the installation and separation of the head body and the head tail.

[0016] Both clamping seats have a slot on their adjacent sides that matches the head body, so as to facilitate the fixation between the head body and the clamping seat.

[0017] As a preferred embodiment of the present invention, the rotating assembly includes a driving component, a rotating disk and several rotating columns. The driving component is disposed in the inner cavity of the worktable. The driving end of the driving component is connected to a rotating shaft. The rotating shaft is connected to the rotating disk. The rotating disk is rotatably connected to the worktable. The several rotating columns are all fixedly connected to the upper arc surface of the rotating disk.

[0018] An annular groove is provided on the surface of the worktable surrounding the lower clamping seat for the rotating column to slide. One end of each of the rotating columns extending out of the annular groove is connected to a corresponding positioning clamping assembly. The rotating column is driven to rotate synchronously under the rotation of the rotating disk, so that the positioning clamping assemblies rotate synchronously.

[0019] As a preferred embodiment of the present invention, the inner cavity of the rotating disk is provided with a circular through groove, and a rack is provided along the inner wall of the circular through groove. The surface of the rotating disk located on the periphery of the circular through groove is connected to several rotating columns. A gear that meshes with the rack is connected to one end of the rotating shaft that extends into the circular through groove. The rotation of the gear drives the rotating disk to rotate.

[0020] As a preferred embodiment of the present invention, four positioning clamping components are provided, and the four positioning clamping components are distributed on an arc surface formed with the clamping seat located on the worktable as the center, so as to clamp the periphery of the specimen with the four positioning clamping components, thereby ensuring the alignment of the head and body with the head and tail.

[0021] As a preferred embodiment of the present invention, the positioning and clamping assembly includes a mounting base connected to the end of the rotating column. An electric telescopic rod is mounted on the surface of the mounting base. A pressing plate is connected to the telescopic end of the electric telescopic rod. Under the driving action of each of the electric telescopic rods, the corresponding pressing plates move closer or further away from each other, so as to clamp or release the specimen accordingly.

[0022] As a preferred embodiment of the present invention, the rotating column includes a fixed column and a telescopic column. The inner cavity of the fixed column is provided with a sliding groove along its own length direction for the telescopic column to slide. Under the downward pressure of the tensioning component, the mounting base moves down synchronously, so that the telescopic column slides along the fixed column, thereby realizing the automatic docking of the head and body with the head and tail.

[0023] As a preferred embodiment of the present invention, a telescopic spring sleeved on the telescopic column is connected between the mounting base and the fixed column, and the head and body located on the worktable are automatically separated from the head and tail located at the bottom of the specimen under the elastic deformation of the telescopic spring.

[0024] In a preferred embodiment of the present invention, the extrusion plate is L-shaped and is slidably connected to the mounting base. The horizontal section and vertical end of the extrusion plate clamp and fix the bottom and side wall of the specimen, respectively, so as to facilitate the positioning of the specimen.

[0025] As a preferred embodiment of the present invention, a limiting groove is formed on the side wall of each of the several mounting seats that are close to each other. The groove of the limiting groove extends into the radial direction of the inner cavity of the mounting seat. A limiting plate is slidably connected to the inner cavity of the limiting groove. A fixing block is connected to one end of the limiting plate that extends out of the limiting groove. The other end of the fixing block is connected to the bottom of the extrusion plate. The stability of the extrusion plate is improved under the support of the limiting plate.

[0026] Compared with the prior art, the present invention has the following advantages:

[0027] This invention can automatically connect the metal clip to the testing machine and automatically separate the metal clip from the test piece without manual installation and disassembly, thereby improving the efficiency of the entire test and facilitating the testing of a large number of test pieces.

[0028] Meanwhile, the metal clip adopts a detachable design, which facilitates the docking and disassembly of the metal clip with the testing machine, and also facilitates the overall replacement of the metal clip and the specimen. When conducting multiple experiments, it is only necessary to replace the head and tail of the metal clip and the specimen as a whole with a new specimen, thereby further improving the testing efficiency of the entire experiment. Attached Figure Description

[0029] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0030] Figure 1 This is a front cross-sectional view of the overall structure provided by the present invention;

[0031] Figure 2 This is a front cross-sectional view of the overall structure of the metal card head after separation, as provided by the present invention.

[0032] Figure 3 This is a front view of the connection structure between the rotating component and the positioning clamping component provided by the present invention;

[0033] Figure 4 A top cross-sectional view of the workbench provided for this invention;

[0034] Figure 5 A top view of the worktable provided for this invention;

[0035] Figure 6 This is a schematic diagram of the head and body structure provided by the present invention;

[0036] Figure 7 This is a schematic diagram of the head and tail structure provided by the present invention;

[0037] The labels in the diagram represent the following:

[0038] 1. Workbench; 2. Tensioning assembly; 3. Clamping seat; 4. Metal chuck; 5. Rotating assembly; 6. Positioning and clamping assembly; 7. Fixed column; 8. Telescopic column; 9. Slide groove; 10. Telescopic spring; 11. Limiting groove; 12. Limiting plate; 13. Fixing block;

[0039] 21. Bracket; 22. Hydraulic telescopic rod; 23. Sliding seat;

[0040] 41. Head and body; 42. Head and tail; 43. Threaded column; 44. Threaded groove; 45. Slot;

[0041] 51. Driving component; 52. Rotary disk; 53. Rotating column; 54. Shaft; 55. Circular through groove; 56. Annular slide groove; 57. Rack; 58. Gear;

[0042] 61. Mounting base; 62. Electric telescopic rod; 63. Extrusion plate. Detailed Implementation

[0043] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0044] like Figure 1-2 As shown, an internal adhesive strength testing machine for automatic card head docking includes a worktable 1, a tensile assembly 2, two clamping seats 3, and a rotating assembly 5.

[0045] Workbench 1, used to receive test specimens;

[0046] The stretching component 2 is set on the surface of the worktable 1 and can reciprocate and extend along the vertical direction of the worktable 1 under the action of driving force.

[0047] Two clamping seats 3 are respectively installed in the workbench 1 and the stretching assembly 2, and metal clips 4 are attached to the side of the two clamping seats 3 that are close to each other.

[0048] The rotating component 5 is embedded in the inner cavity of the worktable 1. The rotating end of the rotating component 5 extends out of the surface of the worktable 1. Under the action of external driving force, the rotating end of the rotating component 5 can rotate circumferentially along the clamping seat 3 on the worktable 1.

[0049] Several positioning clamping components 6 are installed on one end of the rotating component 5 extending out of the worktable 1. Under the action of the several positioning clamping components 6 extending and closing along the head-tail 42 direction, the circumference of the specimen is squeezed and clamped so that the head-tail 42 adhered to the specimen can be aligned with the head-body 41. Under the action of the rotational force of the rotating component 5, the specimen clamped and fixed by the several positioning clamping components 6 rotates synchronously. With the downward pressure of the tensioning component 2, the two head-tail 42 attached to the specimen automatically align and fix with the corresponding head-body 41. Under the action of the reverse rotational force of the rotating component 5, the specimen clamped and fixed by the several positioning clamping components 6 rotates synchronously. With the upward movement of the tensioning component 2, the two head-tail 42 attached to the specimen automatically separate from the corresponding head-body 41.

[0050] Compared with existing testing machines, the testing machine of this application can automatically connect the metal clip to the testing machine and automatically separate the metal clip from the test piece without manual installation and disassembly, thereby improving the efficiency of the entire test and facilitating the testing of a large number of test pieces.

[0051] Among them, such as Figure 1 , Figure 2 , Figure 6 and Figure 7 As shown, the metal clip 4 includes a head body 41 and a tail 42, which are detachably connected. One side of each tail 42 is bonded to the specimen. The head body 41 has a T-shaped cross-section, and the tail 42 has a rectangular cross-section. The head body 41 and tail 42 are connected to form an "I"-shaped clip. A threaded post 43 is provided at the protruding end of the head body 41, and threaded grooves 44 are provided on the surface of the tail 42 for the threaded post 43 to mate with, facilitating the installation and separation of the head body 41 and tail 42. Each clamping seat 3 has a slot 45 on its side that mates with the head body 41, which facilitates the fixation between the head body 41 and the clamping seat 3. The detachable metal clamp 4 allows for the individual replacement and installation of the head body 41 and the head and tail 42. When conducting multiple experiments, it is not necessary to replace the entire metal clamp 4. Only the head and tail 42 needs to be disassembled. Replacing the other head and tail 42 with the existing head body 41 can achieve the testing of another specimen. During this process, there is no need to manually separate the metal clamp from the specimen.

[0052] In the laboratory setting, the two head and tail sections are pre-glued to both sides of the specimen to be tested. The prepared specimen is then placed between the positioning clamping components 6. The drive component in the positioning clamping components 6 is activated, and the specimen is clamped and fixed under the clamping action of the positioning clamping components 6. Under the clamping action of the positioning clamping components 6, the head and tail sections 42 are positioned directly below the head and body sections 41. During assembly, the rotating component 5 rotates while the stretching component 2 is pressed down until it reaches its limit position. At this point, the rotating component 5 drives the specimen to rotate continuously. As the stretching component 2 is pressed down continuously, it drives the head and body sections 41 to rotate continuously into the head and tail sections 42. The head and tail sections located on both sides of the specimen rotate synchronously with the two head and tail sections 42. When the head and body 41 are joined, during the tensile test, the rotating component 5 stops moving, and the positioning clamping component 6 releases the specimen. The tensile component 2 begins to move upward until the specimen is broken, thus completing the experimental test process. After the experimental test is completed, the tensile component 2 continues to press down until it reaches its limit position. At this time, the positioning clamping component 6 is activated to continue clamping the periphery of the separated plates, and the rotating component 5 is activated. Under the rotation of the rotating component 5, and in conjunction with the continuous upward movement of the tensile component 2, the head and body 41 are automatically separated from the head and tail 42, thus disassembling the head and tail 42 from the specimen as a whole. This process is repeated to test a large number of specimens.

[0053] During the experiment, the metal clip 4 was connected to the test piece using hot melt adhesive or epoxy resin adhesive. Since the curing time of hot melt adhesive and epoxy resin adhesive is different, hot melt adhesive has a shorter curing time than epoxy resin adhesive. Therefore, hot melt adhesive is preferred as the connection method to connect the adhesive seat in the metal clip 4 to the test piece.

[0054] Furthermore, such as Figure 1-2 As shown, the stretching assembly 2 includes a bracket 21 installed on both sides of the workbench 1 and a hydraulic telescopic rod 22 installed on the bracket 21. The end of the hydraulic telescopic rod 22 is connected to a sliding seat 23 that slides on the bracket 21. The bottom of the sliding seat 23 is connected to the clamping seat 3. That is, it is sufficient to ensure that the stretching assembly 2 can drive the clamping seat 3 to move up and down.

[0055] Specifically, such as Figure 2-3 As shown, the rotating assembly 5 includes a drive component 51, a rotating disk 52, and several rotating columns 53. The drive component 51 is disposed in the inner cavity of the worktable 1. The drive end of the drive component 51 is connected to a rotating shaft 54, which is connected to the rotating disk 52. The rotating disk 52 is rotatably connected to the worktable 1. Several rotating columns 53 are fixedly connected to the upper arc surface of the rotating disk 52. An annular groove 56 is provided on the surface of the worktable 1 around the lower clamping seat 3 for the rotating columns 53 to slide. The ends of the several rotating columns 53 extending out of the annular groove 56 are respectively connected to each positioning clamping assembly 6.

[0056] The main function of the rotating disk 52 and the rotating column is to drive the specimen to rotate synchronously, and to use the rotational force to separate the head 41 from the head and tail 42. Under the rotation of the rotating disk 52, the rotating column 53 is driven to rotate synchronously, so that several positioning and clamping components 6 rotate synchronously.

[0057] When the rotating disk 52 drives the rotating column 53 to rotate, the rotating column 53 rotates around the clamping seat 3 located on the worktable 1. At this time, the clamping seat 3 is in a suspended state, and the clamping seat 3 is also fixedly connected to the specimen. Once suspended, the state of the clamping seat 3 will be disturbed by the rotation of the rotating component 5. Therefore, when the rotating disk 52 rotates, the rotation of the rotating disk 52 must not disturb the state of the clamping seat 3, and it is also necessary to ensure the fixed connection between the clamping seat 3 and the worktable 1.

[0058] Specifically, such as Figure 3-4 As shown, the inner cavity of the rotating disk 52 is provided with a circular through groove 55. A ring of racks 57 is provided along the inner wall of the circular through groove 55. The surface of the rotating disk 52 located around the circular through groove 55 is connected to several rotating columns 53. A gear 58 that meshes with the racks 57 is connected to one end of the rotating shaft 54 ​​that extends into the circular through groove 55. The rotating disk 52 is driven to rotate by the rotation of the gear 58.

[0059] Since the inner cavity of the rotating disk 52 is hollow, it provides space for the fixed connection between the clamping seat 3 and the worktable 1. The drive of the rotating disk 52 is mainly achieved through the meshing transmission between the gear 58 and the rack 57. The gear 58 only occupies part of the space of the circular through slot 55. Therefore, the installation of the gear 58 will not interfere with the connection between the clamping seat 3 and the worktable 1.

[0060] Because the specimens vary in size, the clamping range of the positioning clamping assembly 6 needs to be adjustable when testing different specimens.

[0061] Specifically, such as Figure 3-5 As shown, four positioning clamping components 6 are provided. The four positioning clamping components 6 are distributed on the arc surface formed with the clamping seat 3 located on the worktable 1 as the center, so that the four positioning clamping components 6 can clamp the periphery of the specimen, thereby ensuring the alignment of the head body 41 with the head and tail.

[0062] Furthermore, such as Figure 3 As shown, the positioning and clamping assembly 6 includes a mounting base 61 connected to the end of the rotating column 53. An electric telescopic rod 62 is mounted on the surface of the mounting base 61. An extrusion plate 63 is connected to the telescopic end of the electric telescopic rod 62. Under the driving action of each electric telescopic rod 62, the corresponding extrusion plates 63 move closer or further away from each other, so as to clamp or release the specimen accordingly.

[0063] During clamping, the electric telescopic rod 62 drives the extrusion plate 63 to move. Each extrusion plate 63 moves towards the clamping seat 3, and the specimen is clamped and fixed by the extrusion plate 63. During the clamping process, the specimen is in a suspended state in the initial stage. When it is in a suspended state, the specimen is easy to fall during the clamping process. In order to avoid such a phenomenon, the extrusion plate 63 is used to clamp the specimen.

[0064] Specifically, such as Figure 3 As shown, the extrusion plate 63 is L-shaped and is slidably connected to the mounting base 61. The horizontal section and vertical end of the extrusion plate 63 clamp and fix the bottom and side wall of the specimen, respectively, so as to facilitate the positioning of the specimen.

[0065] During the extension process, the L-shaped extrusion plate 63 may detach from the support of the mounting base 61. Once detached from the support of the mounting base 61, the extended end of the extrusion plate 63 is suspended in the air, and the stability of the extrusion plate 63 in supporting the specimen is weakened. During the pressing process of the tensioning assembly 2, the specimen is prone to shift towards one end of the extrusion plate 63, which causes the head body 41 and the head and tail 42 to not be accurately aligned. To avoid this phenomenon...

[0066] Specifically, such as Figure 3 As shown, a limiting groove 11 is provided on the side wall of several mounting seats 61 that are close to each other. The groove of the limiting groove 11 extends into the radial direction of the inner cavity of the mounting seat 61. A limiting plate 12 is slidably connected to the inner cavity of the limiting groove 11. A fixing block 13 is connected to one end of the limiting plate 12 that extends out of the limiting groove 11. The other end of the fixing block is connected to the bottom of the extrusion plate 63. The stability of the extrusion plate 63 is improved under the support of the limiting plate 12.

[0067] The limiting plate 12 and the extrusion plate 63 are connected by a fixing block 13. Therefore, during the movement of the extrusion plate 63, the limiting plate 12 moves synchronously. That is, when the extrusion plate 63 extends outward, the limiting plate 12 extends outward along the limiting groove 11. Conversely, when the extrusion plate 63 retracts inward, the limiting plate 12 retracts along the limiting groove 11. The limiting plate 12 supports the suspended end of the extrusion plate 63, thereby improving the stability of the extrusion plate 63.

[0068] When the head body 41 and the head and tail 42 are automatically connected, since the head body 41 and the head and tail 42 are in a screwed connection state, the distance between the head body 41 and the head and tail 42 will continuously decrease during the screwing. At this time, the height of the extrusion plate 63 of the limiting specimen also needs to be continuously adjusted in order to facilitate the connection between the head body 41 and the head and tail 42.

[0069] Specifically, such as Figure 3As shown, the rotating column 53 includes a fixed column 7 and a telescopic column 8. The inner cavity of the fixed column 7 is provided with a sliding groove 9 along its own length direction for the telescopic column 8 to slide. Under the downward pressure of the tensioning component 2, the mounting base 61 is driven to move down synchronously, so that the telescopic column 8 slides along the fixed column 7, thereby realizing the automatic docking of the head body 41 with the head and tail.

[0070] As the head body 41 and the head and tail 42 approach each other, the stretching assembly 2 drives the extrusion plate 63 to extrude the telescopic column 8. At this time, the telescopic column 8 slides down the slide groove 9 in the fixed column 7 to adjust the height of the extrusion plate 63, thereby facilitating the docking of the head body 41 and the head and tail 42.

[0071] After the test, when the head and body 41 and the head and tail 42 are automatically disassembled, the head and tail 42 located above the specimen can adjust the distance between itself and the head and body 41 under the pulling action of the tensioning component 2, so as to facilitate the separation between the upper head and body 41 and the upper head and tail 42. The displacement between the lower head and body 41 and the head and tail 42 is small, which makes it difficult for them to separate on their own. In order to completely separate the specimen from the two clamping seats 3.

[0072] Furthermore, such as Figure 3 As shown, a telescopic spring 10 is sleeved on the telescopic column 8 between the mounting base 61 and the fixed column 7. Under the elastic deformation of the telescopic spring 10, the head body 41 located on the workbench 1 is automatically separated from the head and tail 42 located at the bottom of the specimen.

[0073] The above embodiments are merely exemplary embodiments of this application and are not intended to limit this application. The scope of protection of this application is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to this application within its substance and scope of protection, and such modifications or equivalent substitutions should also be considered to fall within the scope of protection of this application.

Claims

1. A testing machine for the internal adhesive strength of automatically mating card heads, characterized in that, include, Workbench (1), used to receive test specimens; The stretching assembly (2) is disposed on the surface of the worktable (1) and can reciprocate and extend along the vertical direction of the worktable (1) under the action of driving force; Two clamping seats (3) are respectively installed in the workbench (1) and the stretching assembly (2). The two clamping seats (3) are connected to a metal clip (4) on the side that is close to each other. The metal clip (4) includes a head (41) and a head (42). The head (41) and the head (42) are detachably connected. The opposite sides of the two heads (42) are bonded to the specimen. The rotating component (5) is embedded in the inner cavity of the worktable (1). The rotating end of the rotating component (5) extends out of the surface of the worktable (1). Under the action of the external driving force, the rotating end of the rotating component (5) can rotate circumferentially along the clamping seat (3) on the worktable (1). Several positioning clamping components (6) are installed on one end of the rotating component (5) that extends out of the surface of the worktable (1). Under the action of the several positioning clamping components (6) extending and closing along the head and tail (42) direction, the circumference of the specimen is squeezed and clamped so that the head and tail (42) bonded to the specimen can face the head and body (41). Under the rotational force of the rotating component (5), the specimen held and fixed by several positioning clamping components (6) rotates synchronously, and with the downward pressure of the stretching component (2), the two heads and tails (42) attached to the specimen automatically connect and fix with the corresponding head and body (41). Under the reverse rotational force of the rotating component (5), the specimen held and fixed by several positioning clamping components (6) rotates synchronously, and with the upward movement of the stretching component (2), the two heads and tails (42) attached to the specimen automatically separate from the corresponding head and body (41). The head body (41) has a T-shaped cross section, and the head and tail (42) has a rectangular cross section. The head body (41) and the head and tail (42) are connected to form an "I" shaped clamp. The protruding end of the head body (41) is provided with a threaded post (43), and the surface of the head and tail (42) is provided with a threaded groove (44) for the threaded post (43) to engage and connect, so as to facilitate the installation and separation of the head body (41) and the head and tail. Both clamping seats (3) have a slot (45) on the side that is close to each other, which is used to fit the head body (41) so as to fix the head body (41) and the clamping seat (3).

2. The internal bonding strength testing machine for automatic card head docking according to claim 1, characterized in that, The rotating assembly (5) includes a driving component (51), a rotating disk (52) and several rotating columns (53). The driving component (51) is disposed in the inner cavity of the worktable (1). The driving end of the driving component (51) is connected to a rotating shaft (54). The rotating shaft (54) is connected to the rotating disk (52). The rotating disk (52) is rotatably connected to the worktable (1). Several rotating columns (53) are fixedly connected to the upper arc surface of the rotating disk (52). An annular groove (56) is provided on the surface of the worktable (1) around the lower clamping seat (3) for the rotating column (53) to slide. One end of each of the rotating columns (53) extending out of the annular groove (56) is connected to a corresponding positioning clamping assembly (6). Under the rotation of the rotating disk (52), the rotating column (53) is driven to rotate synchronously, so that the several positioning clamping assemblies (6) rotate synchronously.

3. The internal bonding strength testing machine for automatic card head docking according to claim 2, characterized in that, The inner cavity of the rotating disk (52) is provided with a circular through groove (55). A rack (57) is provided along the inner wall of the circular through groove (55). The surface of the rotating disk (52) located on the periphery of the circular through groove (55) is connected to several rotating columns (53). A gear (58) that meshes with the rack (57) is connected to one end of the rotating shaft (54) that extends into the circular through groove (55). The rotating disk (52) is driven to rotate under the rotation of the gear (58).

4. The internal bonding strength testing machine for automatic card head docking according to claim 2, characterized in that, The positioning clamping component (6) is provided in four parts. The four positioning clamping components (6) are distributed on the arc surface formed with the clamping seat (3) located on the worktable (1) as the center, so that the four positioning clamping components (6) can clamp the periphery of the specimen, thereby ensuring the alignment of the head and body (41) with the head and tail.

5. A testing machine for the internal adhesive strength of automatic card head docking according to claim 3, characterized in that, The positioning and clamping assembly (6) includes a mounting base (61) connected to the end of the rotating column (53). An electric telescopic rod (62) is mounted on the surface of the mounting base (61). A pressing plate (63) is connected to the telescopic end of the electric telescopic rod (62). Under the driving action of each of the electric telescopic rods (62), the corresponding pressing plates (63) move closer or further away from each other to clamp or release the specimen accordingly.

6. A testing machine for the internal adhesive strength of an automatic card head assembly according to claim 5, characterized in that, The rotating column (53) includes a fixed column (7) and a telescopic column (8). The inner cavity of the fixed column (7) is provided with a sliding groove (9) for the telescopic column (8) to slide along its own length. Under the downward pressure of the tensioning component (2), the mounting base (61) is driven to move down synchronously so that the telescopic column (8) slides along the fixed column (7), thereby realizing the automatic docking of the head and body (41) with the head and tail.

7. A testing machine for the internal adhesive strength of automatic card head assembly according to claim 6, characterized in that, A telescopic spring (10) sleeved on the telescopic column (8) is connected between the mounting base (61) and the fixed column (7). Under the elastic deformation of the telescopic spring (10), the head (41) located on the workbench (1) is automatically separated from the head and tail (42) located at the bottom of the specimen.

8. A testing machine for the internal adhesive strength of automatic card head docking according to claim 7, characterized in that, The extrusion plate (63) is L-shaped and is slidably connected to the mounting base (61). The horizontal section and vertical end of the extrusion plate (63) clamp and fix the bottom and side wall of the specimen respectively, so as to facilitate the positioning of the specimen.

9. A testing machine for the internal adhesive strength of automatic card head docking according to claim 8, characterized in that, Each of the mounting bases (61) has a limiting groove (11) on one side wall that is close to each other. The groove of the limiting groove (11) extends into the radial direction of the inner cavity of the mounting base (61). The inner cavity of the limiting groove (11) is slidably connected to a limiting plate (12). One end of the limiting plate (12) extending out of the limiting groove (11) is connected to a fixing block (13). The other end of the fixing block is connected to the bottom of the extrusion plate (63). The stability of the extrusion plate (63) is improved under the support of the limiting plate (12).

Images