Test tool
By designing a test tool for PVD ultra-thin coating, using grooves and boss structures to apply compressive stress, combined with auxiliary tape, the problem of the inability to detect the binding strength of PVD ultra-thin coating in the prior art is solved, and the thin plate is achieved Effective evaluation and binding force judgment of structural coatings.
Patent Information
- Application Number
- CN202420101497.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-15
- Publication Date
- 2025-01-17
- Estimated Expiration
- 2034-01-15
AI Technical Summary
The prior art cannot effectively detect the bonding strength of PVD ultra-thin coatings, especially in the detection of adhesion strength of ultra-thin substrates. The indentation method is highly destructive, and the lattice method is limited by the price and scope of application, so it is difficult to Application in industrial production.
A test tool was designed, including a support frame, a fixing plate and stamping parts. Through the cooperation of grooves and boss structures, different degrees of compressive stress are applied, and the bonding strength of the coating is judged by auxiliary tape, which is suitable for thin plate structures. Coating binding force test.
It realizes effective judgment of the bonding strength of PVD ultra-thin coating, and is suitable for thin plate structures. Through groove structures and boss structures with different bending angles, the degree of peeling of the coating can be observed, which improves the accuracy of judgment of bonding strength. and reliability.
Smart Images
Figure CN222364903U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of coating testing, and in particular relates to a testing tool. Background Art
[0002] At present, the main methods for testing coating adhesion are cross-cutting and indentation. The indentation method is highly destructive and is not suitable for testing the adhesion strength of ultra-thin substrates. The cross-cutting test is mainly used in thicker (>100um) paint coatings. PVD (Physical Vapor Deposition) ultra-thin coatings have good self-bonding strength and are thin, which makes it difficult to peel off the pre-coating, making it difficult to classify. Utility Model Content
[0003] The purpose of the utility model is to at least solve the problem that the prior art cannot judge the bonding strength of PVD ultra-thin coatings. This purpose is achieved through the following technical solutions:
[0004] The first aspect of the utility model provides a testing tool, comprising:
[0005] Support frame;
[0006] A fixed plate, the fixed plate is arranged on the support frame and has a first station;
[0007] A stamping part, wherein the stamping part is connected to the support frame and can move toward the first station, the stamping part is provided with a second station corresponding to the first station, one of the first station and the second station is provided with a groove structure, and the other of the first station and the second station is provided with a boss structure, and the groove structure and the boss structure are matched with each other.
[0008] According to the test tooling of the utility model, the support frame is used to support the fixed plate and can drive the stamping part to move toward the fixed plate. The first station of the fixed plate is used to hold the product. The second station and one of the first station of the stamping part are provided with a groove structure, and the other is provided with a boss structure. In the process of the stamping part moving toward the fixed plate, the groove structure and the boss structure can be matched with each other, so as to squeeze the product located at the first station. After a certain period of time, the stamping part is withdrawn, and the bonding strength of the product coating can be judged by the auxiliary tape pre-attached to the product. The utility model is suitable for thin plate structures. When different degrees of compressive stress are applied, marks can be left on the product through the groove structure and the boss structure, so as to facilitate the observation of the degree of peeling of the coating and the judgment of the bonding strength.
[0009] In addition, the test tool according to the utility model may also have the following additional technical features:
[0010] In some embodiments of the present invention, the groove structure includes a plurality of grooves, and the plurality of grooves are arranged at intervals along a first direction, and the first direction is perpendicular to the direction in which the stamping part moves.
[0011] In some embodiments of the present invention, the groove is an elongated groove body, the elongated groove body extends along the second direction, and the first direction, the second direction and the direction in which the stamping part moves are arranged perpendicularly in pairs.
[0012] In some embodiments of the present invention, along the first direction, the maximum lengths of the plurality of grooves first increase and then decrease.
[0013] In some embodiments of the present invention, along the first direction, the maximum widths of the plurality of grooves first increase and then decrease.
[0014] In some embodiments of the present invention, the boss structure includes a plurality of bosses, the plurality of bosses are spaced apart along the first direction, and the grooves and the bosses match one by one.
[0015] In some embodiments of the present invention, at least one first fixing hole is provided on the fixing plate, and the first fixing hole is used to fix the fixing plate on the supporting frame.
[0016] In some embodiments of the present invention, at least one first positioning hole is provided on the fixing plate, and the first positioning hole is used to position the fixing plate on the supporting frame.
[0017] In some embodiments of the present invention, the testing tool further includes a limiting plate, which is disposed on the supporting frame and forms a spacing space with the fixing plate, and the stamping part passes through the limiting plate and can enter the spacing space.
[0018] In some embodiments of the present invention, at least one second positioning hole is provided on the limiting plate, and the second positioning hole is used to position the limiting plate on the supporting frame. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] By reading the detailed description of the preferred embodiment below, various other advantages and benefits will become clear to those of ordinary skill in the art. The accompanying drawings are only used for the purpose of illustrating the preferred embodiment and are not to be considered as limiting the present invention. Moreover, the same reference numerals are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:
[0020] Figure 1 The overall structural diagram of the test tool according to the embodiment of the utility model is schematically shown;
[0021] Figure 2 for Figure 1 A schematic diagram of the structure of the groove at the first station on the middle fixed plate;
[0022] Figure 3 for Figure 2 The cross-sectional structure diagram of the middle groove structure in the AA direction;
[0023] Figure 4 The figure schematically shows a schematic diagram of a test tool according to an embodiment of the utility model for judging the bonding strength grade of a pre-coating layer by means of an adhesive tape.
[0024] The reference numerals in the accompanying drawings represent the following:
[0025] 10. fixing plate; 11. first station; 111. groove structure; 12. first fixing hole; 13. first positioning hole;
[0026] 20. Stamping parts;
[0027] 30. Limiting plate; 31. Second fixing hole; 32. Second positioning hole. DETAILED DESCRIPTION
[0028] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.
[0029] It should be understood that the terms used herein are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive, and therefore specify the existence of stated features, steps, operations, elements and / or parts, but do not exclude the existence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.
[0030] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.
[0031] For ease of description, spatial relative terms may be used herein to describe the relationship of one element or feature relative to another element or feature as shown in the figure, such as "inside", "outside", "inner side", "outer side", "below", "below", "above", "above", etc. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figure. For example, if the device in the figure is turned over, then the elements described as "below other elements or features" or "below other elements or features" will subsequently be oriented as "above other elements or features" or "above other elements or features". Therefore, the example term "below..." can include both upper and lower orientations. The device can be oriented otherwise (rotated 90 degrees or in other directions) and the spatial relative descriptors used in the text are interpreted accordingly.
[0032] At present, the main methods for testing coating adhesion are the cross-hatch method and the indentation method. The cross-hatch method is to use a white grid knife to scratch the surface of the test piece containing the coating, ensuring that the coating penetrates the substrate, and the two scratches are vertically 90°. After completion, use tape to adhere to the surface of the test piece, tear off the tape evenly, and qualitatively judge the coating bonding strength by observing the integrity of the coating at the edge of the scratch. The indentation method uses a Rockwell hardness tester to form an indentation on the product surface under a fixed pressure, and qualitatively judge the coating bonding strength based on the indentation morphology.
[0033] The indentation method is highly destructive and is not suitable for adhesion strength testing of ultra-thin substrates. The cross-cut test is mainly used in thicker (>100um) paint coatings. PVD ultra-thin coatings have good self-bonding strength and thin peeling is not obvious, making it difficult to classify them. The scratch method is limited by equipment prices and is not suitable for industrial production.
[0034] Figure 1 The overall structure diagram of the test tool according to the embodiment of the utility model is schematically shown. Figure 1As shown, the utility model proposes a test fixture. It includes a support frame, a fixed plate 10 and a stamping part 20. The fixed plate 10 is arranged on the support frame and has a first station 11. The stamping part 20 is connected to the support frame and can move toward the first station 11. The stamping part 20 is provided with a second station corresponding to the first station 11. One of the first station 11 and the second station is provided with a groove structure 111, and the other of the first station 11 and the second station is provided with a boss structure. The groove structure 111 and the boss structure are matched with each other.
[0035] According to the test fixture of the utility model, the support frame is used to support the fixed plate 10 and can drive the stamping part 20 to move toward the fixed plate 10. The first station 11 of the fixed plate 10 is used to hold the product. The second station and one of the first station 11 of the stamping part 20 are provided with a groove structure 111, and the other is provided with a boss structure. During the movement of the stamping part 20 toward the fixed plate 10, the groove structure 111 and the boss structure can be matched with each other, thereby squeezing the product located on the first station 11. After a certain period of time, the stamping part 20 is retracted, and the bonding strength of the product coating can be judged by the auxiliary tape pre-attached to the product. The utility model is suitable for thin plate structures. Under the application of different degrees of compressive stress, the groove structure 111 and the boss structure can leave marks on the product, thereby facilitating the observation of the degree of peeling of the coating and the judgment of the bonding strength.
[0036] Specifically, in this embodiment, 3M tape is needed to be used to evenly cover the pre-coated plate during use. On the one hand, this can prevent metal scratches from affecting the judgment of the results. On the other hand, removing the tape after the test can amplify the failure characteristics and assist in judgment.
[0037] In some embodiments of the present invention, Figure 2 and 3 As shown, the groove structure 111 includes a plurality of grooves, the plurality of grooves are arranged along a first direction, and every two adjacent grooves are arranged at intervals, and the first direction is perpendicular to the direction in which the stamping part 20 moves. In this embodiment, a plurality of groove structures 111 are provided, and the plurality of groove structures 111 are arranged along the first direction, so that the groove structure 111 can cooperate with multiple positions of the product, thereby realizing the bonding strength test of a larger area of the coating of the product.
[0038] Specifically, this test tool is only suitable for coating adhesion testing on thin plates (thickness ≤ 0.1mm). Conventional PVD coatings exhibit internal compressive stress. The test tool in this embodiment applies different degrees of compressive stress states through different bending angles of the grooves, observes the degree of peeling of the coating, and thus judges the bonding strength.
[0039] like Figure 2 and 3As shown in the figure, the stress source of the coating is the groove and boss on the fixture. The angles of the sheet after stress bending are 50°, 70°, 90°, 110°, 130°, 120°, 100°, 80°, 60° and 40° from left to right. The compressive stress on the coating is small in the middle and large on both sides. The bending angle and change trend can also be adjusted according to your own needs.
[0040] Specifically, in this embodiment, if Figure 2 and 3 As shown, every two adjacent grooves are arranged at intervals, which can make the product squeezed by the stamping part 20 produce deviations of different heights at multiple positions, so that part of the product and the coating thereon are pressed into the groove. After returning the stamping part 20, if the bonding force of the coating on the product is relatively small, the coating and the product will be separated. If the bonding force of the coating on the product is relatively large, the coating and the product will not be separated, and the coating will still be attached to the product.
[0041] In some embodiments of the present invention, Figure 2 and 3 As shown, the groove is a long strip groove body, which extends along the second direction, and the first direction, the second direction and the stamping direction of the stamping part 20 are arranged perpendicularly in pairs. In this embodiment, the long strip groove is arranged along the second direction, and combined with the multiple grooves arranged in the first direction, the groove structure 111 can correspond to the product to the greatest extent, and when the stamping part 20 is stamped, the coating bonding strength of a larger area of the product can be tested.
[0042] Specifically, in other embodiments of the present invention, the groove may also be in other shapes, such as a curved structure, a dot structure, etc., and the structure of the boss is adapted to the groove.
[0043] In some embodiments of the present invention, Figure 2 and 3 As shown, along the first direction, the maximum lengths of the plurality of grooves first increase and then decrease. In this embodiment, the above arrangement enables the plurality of long strip grooves to have a diamond structure as a whole, specifically, a portion is cut off at the opposite ends of the diamond structure, and after the stamping part 20 extrude the product, the groove structure 111 having a diamond structure as a whole can act on the coating of the product, and partially stick to the tape after the tape is torn off, which can facilitate the operator to observe the detached coating more intuitively, and the diamond deformation design is simple and intuitive, and can quickly perform a qualitative evaluation of the bonding strength of the product coating.
[0044] Specifically, in this embodiment, if Figure 2 and 3As shown, along the first direction, the maximum widths of the plurality of grooves first increase and then decrease. In this embodiment, since the bonding force required by the coating at different positions of the product is also different, the above arrangement can make the coating at each position correspond to grooves of different widths, so that the coating of the product can generally achieve similar bonding force detection, thereby improving reliability.
[0045] In some embodiments of the utility model, the boss structure includes a plurality of bosses, the plurality of bosses are arranged along the first direction, and every two adjacent bosses are arranged at intervals, and the grooves and bosses are matched one by one. In this embodiment, each boss and a groove are matched one by one, and when the two cooperate with each other, the boss can squeeze the product under the action of the stamping part 20, and the groove is used to accommodate the product, so as to achieve extrusion deformation of the product part, thereby better detecting the bonding force of the coating on the product.
[0046] In some embodiments of the present invention, Figure 1 As shown, at least one first fixing hole 12 is provided on the fixing plate 10. In this embodiment, four first fixing holes 12 are provided, and the four first fixing holes 12 are arranged in the circumference of the first station 11. The fixing plate 10 can be fixed to the support frame by connecting members such as screws and bolts, which can ensure the stability of the stamping part 20 when extruding the product.
[0047] In some embodiments of the present invention, Figure 1 As shown, at least one first positioning hole 13 is provided on the fixing plate 10. In this embodiment, the first positioning hole 13 is provided with a fourth, and the four first positioning holes 13 are used to position the fixing plate 10 on the support frame, and cooperate with positioning members such as fixing pins or positioning pins to accurately position the fixing plate 10, thereby improving the accuracy of the product during the test process.
[0048] In some embodiments of the present invention, Figure 1 As shown, the test fixture further includes a limit plate 30, which is arranged on the support frame and forms a spacing space with the fixed plate 10, and the stamping part 20 is passed through the fixed plate 10 and can be located in the spacing space. In this embodiment, there is a positioning hole in the limit plate 30, and the stamping part 20 is clearance-matched with the positioning hole. The stamping part 20 can pass through the fixed plate 10 and be located in the spacing space to stamp the product on the first station 11, thereby realizing the test of the coating bonding strength of the product.
[0049] In some embodiments of the present invention, Figure 1As shown, at least one second fixing hole 31 is provided on the limit plate 30. In this embodiment, four second fixing holes 31 are provided, and the four second fixing holes 31 are located in the circumference of the positioning hole. With the help of connecting parts such as bolts or screws, the limit plate 30 can be stably fixed, thereby improving the stability of the stamping part 20 during the stamping process of the product.
[0050] In some embodiments of the present invention, Figure 1 As shown, at least one second positioning hole 32 is provided on the limit plate 30. In this embodiment, the second positioning hole 32 is provided with a fourth, and the four second positioning holes 32 are used to position the limit plate 30 on the support frame, and cooperate with positioning members such as fixing pins or positioning pins to accurately position the position of the limit plate 30, thereby improving the positioning accuracy of the stamping part 20 during the test process.
[0051] Furthermore, the operation process of the test tool of the utility model is as follows:
[0052] Cut the pre-coated flat plate (thin plate) sample to a size of 30*30mm 2 ;
[0053] Take 3M tape and attach it to the surface of the pre-coated flat plate (thin plate), compact it to ensure full contact;
[0054] Place the pre-coated flat plate (thin plate) on the first station 11, and apply 0.5-5T pressure to the stamping part 20 at 0-100°C for 0.2-1 minute;
[0055] Remove the 3M tape, clean the pre-coated flat plate (sheet), observe the product or tape morphology, and determine the product bonding strength level based on the critical bending angle of coating peeling. Figure 4 , for example, by removing the tape from the extruded pre-coated sheet Figure 4 When the shape of the first tape is shown, it means that the bending angle that the pre-coating can accept is less than or equal to 40°. At this time, the attachment result of the surface pre-coating is better. Figure 4 The same applies to other tape shapes.
[0056] The above is only a preferred specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.
Claims
1. A test tool, characterized in that: include: Support frame; A fixed plate, the fixed plate is arranged on the support frame and has a first working position; A stamping part, wherein the stamping part is connected to the support frame and can move toward the first station, the stamping part is provided with a second station corresponding to the first station, one of the first station and the second station is provided with a groove structure, and the other of the first station and the second station is provided with a boss structure, and the groove structure and the boss structure are matched with each other.
2. The test tool according to claim 1, characterized in that: The groove structure includes a plurality of grooves, and the plurality of grooves are arranged at intervals along a first direction, and the first direction is perpendicular to a direction in which the stamping part moves.
3. The test tool according to claim 2, characterized in that: The groove is a long strip-shaped groove body, and the long strip-shaped groove body extends along the second direction. The first direction, the second direction and the direction in which the stamping part moves are arranged perpendicularly in pairs.
4. The test fixture according to claim 3, characterized in that: Along the first direction, the lengths of the plurality of grooves first increase and then decrease.
5. The test tool according to claim 3, characterized in that: Along the first direction, the widths of the plurality of grooves first increase and then decrease.
6. The test tool according to claim 2, characterized in that: The boss structure includes a plurality of bosses, the plurality of bosses are arranged at intervals along the first direction, and the grooves and the bosses are matched one by one.
7. The test tool according to claim 1, characterized in that: The fixing plate is provided with at least one first fixing hole, and the first fixing hole is used to fix the fixing plate on the supporting frame.
8. The test tool according to claim 1, characterized in that: At least one first positioning hole is provided on the fixing plate, and the first positioning hole is used to position the fixing plate on the supporting frame.
9. The test tool according to claim 1, characterized in that: The testing fixture further comprises a limiting plate, which is arranged on the supporting frame and forms a spacing space with the fixing plate, and the stamping part passes through the limiting plate and can enter the spacing space.
10. The test fixture according to claim 9, characterized in that: At least one second positioning hole is provided on the limiting plate, and the second positioning hole is used to position the limiting plate on the supporting frame.