Testing device

Abstract

The invention relates to the technical field of testing tools, and provides a testing device which comprises a base used for bearing a drawing sample, a pressing plate arranged on the base, a blue film penetrating between the base and the pressing plate, and a cutting mechanism moving relative to the pressing plate in the direction perpendicular to the blue film and used for cutting the blue film according to a preset shape. The coating mechanism comprises a plurality of compression rollers which are symmetrically arranged in the circumferential direction of the upper surface of the drawing sample, the blue film is rapidly and accurately cut according to the coating shape through the cutting mechanism, the preparation time is greatly shortened, the working efficiency is improved, waste of the blue film is reduced through accurate cutting, and the production cost is reduced. The blue film is more firmly bonded on the drawing sample through the coating mechanism, the consistency of the bonding strength is effectively ensured, the operation process is simplified through the design of the tool, the operation difficulty is reduced, the repeatability of the test is improved, the flexibility of the tool enables the tool to adapt to drawing samples of different sizes and shapes, and the production efficiency is improved. And the applicability and the universality are enhanced.

Description

Technical Field

[0001] This invention relates to the field of testing tools, and in particular to a testing apparatus. Background Technology

[0002] The bonding quality of the blue film on the battery cells directly affects the battery's safety and lifespan. As a protective layer for the cells, the blue film possesses excellent conductivity, adhesion, and chemical stability, playing a crucial role in preventing short circuits and isolating the cells from moisture and air. Therefore, blue film bonding tests are necessary during production to obtain the bonding mechanical properties of the blue film. During the test, the blue film is wrapped around a pull-out sample, typically a metal block structure. The blue film is wrapped around its front, back, left, right, and top surfaces. First, the blue film is cut according to the surface of the pull-out sample, and then it is wrapped. The entire process is done manually. To ensure the accuracy of the test results, operators need high levels of skill and experience, ensuring accurate cutting dimensions and a smooth, bubble-free wrapping.

[0003] However, in actual operation, due to the thinness of the blue film, manual cutting is prone to damage, and it is difficult to ensure a smooth bonding surface during pasting. This results in problems such as complicated operation, low efficiency, and difficulty in guaranteeing bonding quality. Furthermore, multiple bonding tests are required before production to test different blue films. Manually operated samples cannot guarantee the consistency of bonding strength. Therefore, how to quickly and accurately cut the blue film and wrap it on the metal sample has become an important factor restricting the efficiency and accuracy of the test. Summary of the Invention

[0004] The purpose of this invention is to provide a testing device to solve the problems in the prior art, which can quickly, accurately and efficiently complete the cutting and coating of blue film.

[0005] This invention provides a testing apparatus, comprising: The base is used to support the pull-out test specimen; A pressure plate is disposed on the base, and the blue film passes through the space between the base and the pressure plate; A cutting mechanism is movably mounted on the pressure plate and moves relative to the pressure plate in a direction perpendicular to the blue film to cut the blue film into a preset shape. The coating mechanism, located on the cutting mechanism, includes multiple pressure rollers symmetrically arranged circumferentially along the upper surface of the drawn sample. The pressure rollers drive the drawn sample to move toward the coating mechanism. During the movement, the multiple pressure rollers wrap the blue film cut into a preset shape around the surface of the drawn sample.

[0006] In the testing device described above, preferably, the cutting mechanism includes a first cutting component and a second cutting component, wherein the second cutting component, the first cutting component, and the pressure plate are coaxially connected in sequence via guide posts, and a first spring is provided on the guide posts.

[0007] In the testing device described above, preferably, the first cutting component is used to cut the blue film into quadrilaterals according to the unfolded area of ​​the pull-out sample, including a first fixing plate and a first cutter. The first fixing plate is provided with a first through groove, which is adapted to the contour of the quadrilateral after the blue film is cut. The first cutter is symmetrically arranged below the first fixing plate along the circumference of the first through groove.

[0008] In the testing device described above, preferably, the first cutting tool has two first cutting edges symmetrically arranged along the central axis, and the ends of the two first cutting edges are staggered.

[0009] In the testing apparatus described above, preferably, the second cutting assembly is used to cut the blue film into a cross shape along the edge of the pull-out sample, including a second fixing plate and a second cutter. The second fixing plate has a second through groove that matches the upper surface contour of the pull-out sample, and the second cutter is symmetrically arranged below the second fixing plate along the circumference of the second through groove.

[0010] In the testing apparatus described above, preferably, the second cutting tool has two vertically arranged second cutting edges, the ends of which are staggered.

[0011] In the testing device described above, preferably, the base is provided with a third through groove and a guide groove, the pull-out sample is disposed through the third through groove, and the guide groove is used to reserve space for the cutting action of the cutting mechanism.

[0012] In the testing device described above, preferably, the pressure plate has a fourth through groove to avoid the cutting mechanism.

[0013] In the testing device described above, preferably, a plurality of U-shaped frames are mounted on the first fixing plate, the U-shaped frames are respectively located at the four corners of the first through slot, one end of the U-shaped frame is connected to the pressure plate, and the other end is pressed against the blue film.

[0014] In the testing device described above, preferably, the covering mechanism further includes a curved rod and a second spring. One end of the curved rod is connected to the cutting mechanism, and the other end is connected to the pressure roller. One end of the second spring is connected to the middle of the curved rod, and the other end is connected to the cutting mechanism.

[0015] Compared with existing technologies, this invention uses a cutting mechanism to quickly and accurately cut the blue film according to the coating shape, which greatly shortens the preparation time, improves work efficiency, and reduces the waste of blue film. The coating mechanism makes the blue film adhere more firmly to the pull-out sample, effectively ensuring the consistency of the bonding strength. The design of this fixture simplifies the operation process, reduces the operation difficulty, and improves the repeatability of the test. The flexibility of the fixture allows it to adapt to pull-out samples of different sizes and shapes, enhancing its applicability and versatility. Attached Figure Description

[0016] Figure 1 This is a perspective view of the testing apparatus provided in an embodiment of the present invention; Figure 2 yes Figure 1 Enlarged view of point A; Figure 3 This is a front view of the first cutting component provided in an embodiment of the present invention; Figure 4 This is a perspective view of the second cutting component provided in an embodiment of the present invention; Figure 5 yes Figure 4 Enlarged view of point B; Figure 6 This is a perspective view of the base provided in an embodiment of the present invention; Figure 7 This is a top view of the pressure plate and U-shaped frame provided in an embodiment of the present invention; Figure 8 This is an enlarged view of the U-shaped frame provided in an embodiment of the present invention; Figure 9 This is a perspective view of the covering mechanism provided in an embodiment of the present invention; Figure 10 yes Figure 9 Enlarged view of point C; Figure 11 This is a diagram showing the state of the pull-out sample and the blue film coating provided in the embodiments of the present invention.

[0017] Explanation of reference numerals in the attached figures: 10. Base; 11. Pressure plate; 12. Guide post; 13. First spring; 14. Third through slot; 15. Guide slot; 16. Fourth through slot; 17. U-shaped frame; 20. Cutting mechanism; 21. First cutting assembly; 210. First fixing plate; 211. First through groove; 212. First cutter; 213. First cutting edge; 22. Second cutting assembly; 220. Second fixing plate; 221. Second through groove; 222. Second cutter; 223. Second cutting edge; 30. Covering mechanism; 31. Pressure roller; 32. Curved rod; 33. Second spring; 40. Blue film; 41. Pull-out sample. Detailed Implementation

[0018] The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0019] See Figure 11 As shown, blue film 40 is a blue protective film commonly used in semiconductor and electronic component processing. It is adhesive and used to fix materials such as chips and wafers. The purpose of the blue film adhesion test is to verify whether the adhesion strength between the blue film 40 and the material surface meets the process requirements. In fields such as power battery pack cells, frequent adhesion tests of different blue films 40 are required. During the test, the blue film 40 needs to be evenly adhered to the surface of the pull-out sample 41, ensuring that its surface is free of air bubbles. After coating, peel strength and holding power tests are performed on the blue film 40 according to process requirements. The pull-out sample 41 is generally a square metal block. The blue film 40 is evenly adhered to its top and five surfaces (front, back, left, and right). However, the blue film 40 is relatively thin and difficult to cut manually. It is difficult to accurately cut a complete blue film 40 according to the coating shape of the pull-out sample 41, which easily causes damage to the blue film 40. It is also difficult to ensure a smooth, bubble-free surface when pasting it. This not only wastes material but also makes it difficult to guarantee the consistency of adhesion strength, leading to inaccurate test results.

[0020] See Figure 1 As shown, this embodiment provides a testing device that can accurately and quickly cut the blue film 40 and flatly cover it onto the surface of the pull-out sample 41. It includes a base 10, a pressure plate 11, a cutting mechanism 20, and a covering mechanism 30, wherein: The base 10 supports the pull-out sample 41. A pressure plate 11 is mounted on the base 10, and a blue film 40 passes between the base 10 and the pressure plate 11. One side of the blue film 40 is adhesive. By facing this adhesive side towards the pull-out sample 41, the blue film 40 can be initially adhered and positioned to the upper surface of the pull-out sample 41. The gap between the base 10 and the pressure plate 11 is set to be small, allowing the pressure plate 11 to limit and smooth the blue film 40. Alternatively, in another embodiment, the pressure plate 11 can be movable and locked relative to the base 10. Initially, there is a gap between the pressure plate 11 and the base 10. After the blue film 40 passes through this gap, the pressure plate 11 presses against the blue film 40 against the upper surface of the base 10 and locks it in place using bolts or similar means to prevent the blue film 40 from shifting during cutting.

[0021] The cutting mechanism 20 is movably mounted on the pressure plate 11 and moves relative to the pressure plate 11 in a direction perpendicular to the blue film 40. It is used to cut the blue film 40 into a preset shape. In this embodiment, the blue film 40 passes horizontally between the base 10 and the pressure plate 11. The cutting mechanism 20 is vertically movable, and when it contacts the blue film 40, it cuts it into the preset shape. See also... Figure 11 As shown, the preset shape in this embodiment is the shape of the blue film 40 covering the five sides of the pull sample 41, namely the top, front, back, left and right sides, and the sides are continuous and uninterrupted, forming a cross shape. The center of the cross shape is the upper surface of the pull sample 41, and the sides extending from the center are the four sides of the pull sample 41.

[0022] The coating mechanism 30 is mounted on the cutting mechanism 20 and includes multiple pressure rollers 31 symmetrically arranged circumferentially along the upper surface of the drawn sample 41. These rollers drive the drawn sample 41 to move towards the coating mechanism 30. During this movement, the pressure rollers 31 wrap the blue film 40, cut into a preset shape, around the surface of the drawn sample 41. In this embodiment, four pressure rollers 31 are arranged symmetrically in pairs. During the movement of the drawn sample 41 and the blue film 40, the four pressure rollers 31 simultaneously squeeze the blue film 40, thereby coating it around the four side surfaces of the drawn sample 41. The cutting mechanism 20 cuts the blue film 40 into a complete preset shape. The squeezing action of each pressure roller 31 not only ensures that the blue film 40 aligns with the corresponding surface but also prevents air bubbles from forming on the bonding surface.

[0023] See Figure 2-5 As shown, in one feasible embodiment, the cutting mechanism 20 includes a first cutting component 21 and a second cutting component 22. The second cutting component 22, the first cutting component 21, and the pressure plate 11 are coaxially connected in sequence via guide posts 12, and a first spring 13 is mounted on the guide posts 12. The second cutting component 22 is positioned above the first cutting component 21. The guide posts 12 serve as guides, and the first springs 13 support the first cutting component 21 and the second cutting component 22 respectively. By compressing the first springs 13, the first cutting component 21 and the second cutting component 22 can move along the guide posts 12 toward the pressure plate 11. When the applied force is released, the first cutting component 21 and the second cutting component 22 can automatically reset.

[0024] See Figure 3As shown, in order to enable the cutting mechanism 20 to cut the blue film 40 into a preset shape, in this embodiment, the first cutting component 21 is used to cut the blue film 40 into a quadrilateral according to the unfolded area of ​​the pull-out sample 41. It includes a first fixing plate 210 and a first cutter 212. The first fixing plate 210 has a first through groove 211 that matches the contour of the quadrilateral after the blue film 40 is cut. The first cutter 212 is symmetrically arranged circumferentially below the first fixing plate 210 along the first through groove 211. The first cutting component 21 can first cut the blue film 40 into a quadrilateral. The cutting area of ​​the first cutter 212 determines the cutting boundary of the blue film 40, ensuring that the cut quadrilateral completely matches the unfolded area of ​​the pull-out sample 41.

[0025] See Figure 3 As shown, since the blue film 40 is relatively thin, if the blade is perpendicular to the blue film 40, it may cause damage. Therefore, in this embodiment, the first cutter 212 has two first blades 213 symmetrically arranged along the central axis, and the ends of the two first blades 213 are staggered. The two first blades 213 are inclined downwards, with the cutting edge facing the blue film 40. When cutting, the cutting edge contacts the blue film 40 in an oblique cutting posture. The staggered ends of the two first blades 213 form a progressive cutting path, using shearing force to achieve smooth cutting instead of vertical compression and tearing, thus avoiding damage to the blue film 40 and effectively avoiding burrs caused by cutting.

[0026] See Figure 4-5 As shown, in this embodiment, the second cutting component 22 is used to cut the blue film 40 into a cross shape along the edge of the pull-out sample 41. It includes a second fixing plate 220 and a second cutter 222. The second fixing plate 220 has a second through groove 221, which is adapted to the contour of the upper surface of the pull-out sample 41. The second cutter 222 is symmetrically arranged below the second fixing plate 220 along the circumference of the second through groove 221. The second cutting component 22 can cut simultaneously with the first cutting component 21, or the first cutting component 21 can cut out a quadrilateral first and then cut out the covering edge. The second through groove 221 is centered on the upper surface of the pull-out sample 41. The second cutter 222 adds two perpendicularly intersecting cuts along the edge of the pull-out sample 41 to form a cross-shaped structure. When the blue film 40 covers the pull-out sample 41, the cross-shaped blue film 40 can be folded down to contact the four sides of the pull-out sample 41 respectively, improving the fit.

[0027] See Figure 5 As shown, the second cutter 222 has two vertically arranged second blades 223, the ends of which are staggered. The second cutter 222 is arranged vertically along the edge of the drawn sample 41. The four second cutters 222 work simultaneously to cut the blue film 40 into shape in one go. The purpose of the staggered arrangement of the ends of the second blades 223 is the same as that of the first blade 213, and will not be described again here.

[0028] See Figure 6 As shown, in this embodiment, the base 10 has a third through groove 14 and a guide groove 15. The pull-out sample 41 passes through the third through groove 14, and the guide groove 15 is used to reserve space for the cutting action of the cutting mechanism 20. The third through groove 14 is a through groove, allowing the operator to lift the pull-out sample 41 from the bottom of the base 10 through the third through groove 14 to the upper surface of the base 10, thereby bonding it with the blue film 40. When coating is required, the pull-out sample 41 can be lifted from the third through groove 14. The guide groove 15 is adapted to the shape of the first cutter 212 and the second cutter 222, and can provide guidance for their cutting, preventing them from contacting the pull-out sample 41 or the base 10 and generating rigid friction. The driving force for lifting the pull-out sample 41 can be manual or other pushing mechanisms, such as using a telescopic electric push rod, etc., which is not limited here.

[0029] See Figure 7 As shown, the pressure plate 11 is further provided with a fourth through groove 16 to avoid the cutting mechanism 20. When the blue film 40 is cut, the pull sample 41 will pass through the pressure plate 11 when it moves towards the covering mechanism 30. Therefore, the fourth through groove 16 is adapted to the contour of the quadrilateral cut by the blue film 40, so that it can contact the blue film 40 to the maximum extent and prevent its displacement. The cutting mechanism 20 can be allowed to extend into the fourth through groove 16 to cut the blue film 40.

[0030] See Figure 1 and Figure 7-8 As shown, when the blue film 40 is cut into a quadrilateral and separated from the whole, it is easy to cause displacement when a cross-shaped cut is made. Therefore, in this embodiment, a plurality of U-shaped frames 17 are mounted on the first fixing plate 210. The U-shaped frames 17 are located at the four corners of the first through groove 211. One end of the U-shaped frame 17 is connected to the pressure plate 11, and the other end is pressed against the blue film 40. When the blue film 40 is cut into a cross shape, the blue film 40 at its four corners is excess material. The U-shaped frame 17 presses against this part to limit its movement and prevent the blue film 40 from warping or deforming during the cutting process of the second cutting component 22. The U-shaped frame 17 is mounted on the first fixed plate 210 and does not contact the first fixed plate 210 to avoid affecting the movement when the first cutting component 21 is cutting. The second cutting component 22 can only move to the position of the U-shaped frame 17 at most. Therefore, the height of the second cutter 222 should ensure that when the second fixed plate 220 contacts the U-shaped frame 17, the second cutter 222 can extend into the guide groove 15 to completely cut the blue film 40. It should be noted that during the movement of the blue film 40 to cover the film, although the first cutter 212 and the second cutter 222 are both located on the movement path, the blue film 40 will no longer come into contact with the second cutter 222 after it is cut into a cross shape. Furthermore, during the movement of the blue film 40, the four sides have already begun to be folded downwards under force. Therefore, the cutting mechanism 20 will no longer affect the blue film 40 during the movement.

[0031] See Figure 9-10 As shown, after the blue film 40 is cut, the pull-out sample 41 lifts the blue film 40. During the lifting process, the blue film 40 is covered on each surface of the pull-out sample 41 by the covering mechanism 30. In order to realize the covering and self-recovering functions of the covering mechanism 30, the covering mechanism 30 also includes a curved rod 32 and a second spring 33. One end of the curved rod 32 is connected to the cutting assembly, and the other end is connected to the pressure roller 31. One end of the second spring 33 is connected to the middle of the curved rod 32, and the other end is set on the cutting mechanism 20. The curved rod 32 is a rod-shaped structure with a bending axis as its geometric feature. In this embodiment, the curved rod 32 includes two rod sections connected by hinges. One rod section is perpendicularly connected to the second fixed plate 220, and the other rod section is rotatably connected to the pressure roller 31. The pressure roller 31 can rotate around the rotating joint of the rod and move along the curve of the hinge with the rod connected to it. The pressure roller 31 replaces sliding friction with rolling friction, making the blue film 40 more evenly stressed during the covering process and avoiding scratches on the blue film 40. The rotation of the pressure roller 31 is synchronized with the lifting action of the pulling sample 41, forming a continuous covering process, that is, the pressure roller 31 rotates and presses down at the same time.

[0032] See Figure 10 As shown, the rod connected to the pressure roller 31 is inclined to the second fixed plate 220 under the traction of the second spring 33. In the initial state, the space area formed by the multiple pressure rollers 31 is smaller than the upper surface area of ​​the pull-out sample 41. When the blue film 40 and the pull-out sample 41 pass through the multiple pressure rollers 31, the pull-out sample 41 pushes up the pressure rollers 31. Under the action of the second spring 33 and the curved rod 32, the multiple pressure rollers 31 can be spread open by the pull-out sample 41 in the circumferential direction and the blue film 40 is pressed tightly onto the surface of the pull-out sample 41. When the pull-out sample 41 completes the wrapping and removes from the tooling, the pressure rollers 31 automatically reset under the tension of the second spring 33. It should be noted that the base 10 can support multiple pull-out samples 41, and each pull-out sample 41 is provided with a first cutter 212, a second cutter 222 and a pressure roller 31 mechanism. In this way, multiple pull-out samples 41 can be coated with blue film 40 at one time. In addition, different sizes of cutting components can be designed according to different pull-out samples 41, which increases the flexibility of the tooling.

[0033] Based on the above embodiments, the working process of the testing device provided by the present invention is as follows: With the adhesive side of the blue film 40 facing down, it passes through the pressure plate 11 and the base 10. The pull-out sample 41 is placed in the third through groove 14. When the adhesive side faces up, the first cutting component 21 and the second cutting component 22 are pressed down sequentially or simultaneously. The first cutting component 21 cuts the blue film 40 into a quadrilateral, and the second cutting component 22 cuts the blue film 40 into a cross shape. During the cutting process, the U-shaped frame 17 presses against the four corners of the blue film 40, i.e., the four extra corners when cutting into a cross shape, which can prevent the blue film 40 from shifting when the second cutting component 22 cuts. The pull-out sample 41 is pushed out of the blue film 40 from bottom to top. During the pushing-out process, multiple pressure rollers 31 press the blue film 40 tightly onto the surface of the pull-out sample 41 to achieve the coverage of the blue film 40.

[0034] The above description, based on the embodiments shown in the figures, details the structure, features, and effects of the present invention. The above description is only a preferred embodiment of the present invention, but the present invention is not limited to the scope of implementation shown in the figures. Any changes made in accordance with the concept of the present invention, or equivalent embodiments modified to have equivalent changes, that do not exceed the spirit covered by the specification and figures, should be within the protection scope of the present invention.

Claims

1. A testing device, characterized in that, include: The base is used to support the pull-out test specimen; A pressure plate is disposed on the base, and the blue film passes through the space between the base and the pressure plate; A cutting mechanism is movably mounted on the pressure plate and moves relative to the pressure plate in a direction perpendicular to the blue film to cut the blue film into a preset shape. The coating mechanism, located on the cutting mechanism, includes multiple pressure rollers symmetrically arranged circumferentially along the upper surface of the drawn sample. The pressure rollers drive the drawn sample to move toward the coating mechanism. During the movement, the multiple pressure rollers wrap the blue film cut into a preset shape around the surface of the drawn sample.

2. The testing apparatus according to claim 1, characterized in that, The cutting mechanism includes a first cutting component and a second cutting component. The second cutting component, the first cutting component, and the pressure plate are coaxially connected in sequence through guide posts, and a first spring is provided on the guide posts.

3. The testing apparatus according to claim 2, characterized in that, The first cutting assembly is used to cut the blue film into quadrilaterals according to the unfolded area of ​​the pull-out sample. It includes a first fixing plate and a first cutter. The first fixing plate has a first through groove, which is adapted to the outline of the quadrilateral after the blue film is cut. The first cutter is symmetrically arranged below the first fixing plate along the circumference of the first through groove.

4. The testing apparatus according to claim 3, characterized in that, The first cutting tool has two first cutting edges arranged symmetrically along the central axis, and the ends of the two first cutting edges are staggered.

5. The testing apparatus according to claim 2, characterized in that, The second cutting assembly is used to cut the blue film into a cross shape along the edge of the pull-out sample. It includes a second fixing plate and a second cutter. The second fixing plate has a second through groove that matches the upper surface contour of the pull-out sample. The second cutter is symmetrically arranged below the second fixing plate along the circumference of the second through groove.

6. The testing apparatus according to claim 5, characterized in that, The second cutting tool has two vertically arranged second cutting edges, with the ends of the two second cutting edges staggered.

7. The testing apparatus according to claim 1, characterized in that, The base is provided with a third through groove and a guide groove. The pull-out sample is inserted through the third through groove, and the guide groove is used to reserve space for the cutting action of the cutting mechanism.

8. The testing apparatus according to claim 1, characterized in that, The pressure plate has a fourth through groove to avoid the cutting mechanism.

9. The testing apparatus according to claim 3, characterized in that, Multiple U-shaped frames are mounted on the first fixing plate. The U-shaped frames are located at the four corners of the first through groove. One end of the U-shaped frame is connected to the pressure plate, and the other end is pressed against the blue film.

10. The testing apparatus according to claim 1, characterized in that, The coating mechanism also includes a curved rod and a second spring. One end of the curved rod is connected to the cutting mechanism, and the other end is connected to the pressure roller. One end of the second spring is connected to the middle of the curved rod, and the other end is connected to the cutting mechanism.

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