Device for testing adhesive force of spraying layer of automobile part

Abstract

The utility model relates to an automobile part spray coating adhesive force testing device which comprises a clamping table, a testing device and a control device, the clamping table comprises a base, the testing device and a locking mechanism above the base, the testing device comprises a fixing block, and a cutting knife and a pressing rod are arranged below the fixing block. Sawteeth are arranged at the lower end of the cutting knife, and the pressing rod is located in the cutting knife. A driving device is connected to the upper end of the pressing rod and fixedly connected with the inner wall of the fixing block. The control device is connected with the driving device, and the force applied to the speed of the driving device can be controlled through the control device. According to the utility model, the coating sample can be prevented from moving along with the test column when the test column is pulled up through the locking device, the cutting knife connected with the fixed block can be used for cutting the coating and preventing the test column from being touched, and the test column and the coating sample can be connected more tightly through the pressing rod and the chuck; the test result is prevented from being influenced by air in the glue or inclined test column.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of coating adhesion test, especially relates to a test device for adhesion of spraying layer of automobile parts. BACKGROUND

[0002] In the automobile production process needs to paint each part of the vehicle body, the main purpose of automobile painting is to protect the vehicle body from corrosion, and increase the vehicle's aesthetic degree. Coating adhesion refers to the firmness of the paint layer and the surface of the painted object combined together by physical or chemical force. Coating adhesion is the most important index for evaluating a coating or coating system. The coating is applied to the surface of the object, forming a continuous coating with firm adhesion and certain strength.

[0003] The method for testing coating adhesion usually has grid and pull, and the pull experiment usually connects the test column and the coating sample together by glue, and then pulls the test column from the surface of the sample by the testing machine, and records the vertical force through the connected pressure gauge. But in the actual test process, the coating around the test column often needs to be cut, and the cutting is usually manually cut by the processing personnel using tools, but the cutting process is easy to cause the cutting area to be irregular, and at this time, the cutting area is pulled for testing, and the area is unevenly stressed, thereby affecting the pull test result. UTILITY MODEL CONTENT

[0004] The present application provides a kind of test device for adhesion of spraying layer of automobile parts, to solve the problem of cutting tool when cutting coating meets test column and thereby affects pull test result.

[0005] The utility model solves the above-mentioned technical problems by adopting the technical scheme of a kind of test device for adhesion of spraying layer of automobile parts, including clamping table, testing device and control device, characterized by: the clamping table includes base, and two supporting arms are fixedly connected above base, and top plate is connected between supporting arms.

[0006] Further, the testing device is located above the top plate, and the testing device includes a pressure rod, a cutting knife is provided on the outer sleeve of the pressure rod, and the pressure rod and the cutting knife are located on the fixed block. The upper end of the pressure rod is connected to a driving device, and the top plate is provided with a through hole through which the pressure rod and the cutting knife can pass.

[0007] Further, the fixed block is a hollow structure, and the lower end is provided with an opening. The inner wall of the fixed block is provided with a sliding groove. The cutting knife is cylindrical, and the lower end is provided with a sawtooth. The upper end of the cutting knife is located inside the cavity of the fixed block. The outer wall of the cutting knife is provided with a sliding block that is slidingly connected to the sliding groove.

[0008] Further, the testing device is connected with the base through a positioning column, a sleeve ring is arranged on the positioning column, a limiting ring is arranged below the sleeve ring, the limiting ring is connected with the positioning column through threads, a fixed arm is fixedly connected to the sleeve ring, and the fixed arm is fixedly connected with the fixed block.

[0009] Further, a locking mechanism is arranged on the top plate, the locking mechanism comprises two threaded holes, a threaded rod is arranged in the threaded holes, and a pressing block is fixedly connected to the lower end of the threaded rod.

[0010] Further, the sliding groove is composed of an annular sliding groove and an L-shaped sliding groove, and the two are communicated, so that the cutting knife can move up and down in the fixed block.

[0011] Further, a chuck is arranged at the lower end of the pressing rod, the chuck is fixedly connected with the pressing rod, a radially extending strip-shaped notch is arranged on the chuck, and the chuck can be connected with the test column.

[0012] Further, the test column comprises a base plate and an anti-disengagement head, the base plate and the anti-disengagement head are connected through an arc-shaped connecting block, the connecting block can enter the strip-shaped notch, and at this time, the anti-disengagement head is located above the chuck.

[0013] Further, the control device is connected with the driving device through wires, and the speed and the force exerted by the driving device can be controlled through the control device.

[0014] Compared with the prior art, the testing device has the advantages that: the testing device has a simple structure and is convenient to use, the test column can be prevented from being pulled up with the coating sample moving when the test column is pulled up through the locking device, the cutting knife can cut the coating while avoiding touching the test column to affect the test result, and the test column and the coating sample can be more closely connected through the pressing rod and the chuck, so that the test result is not affected by air in the glue or the test column being skewed. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a front view structural schematic diagram of the testing device;

[0016] Figure 2 is a side view structural schematic diagram of the testing device;

[0017] Figure 3 is a testing device structural schematic diagram of the testing device;

[0018] Figure 4 is a fixed block expanded structural schematic diagram of the testing device;

[0019] Figure 5 is a top view structural schematic diagram of the testing device;

[0020] Figure 6 is a chuck top view structural schematic diagram of the testing device;

[0021] 1-base, 2-branch, 3-top plate, 4-pressing block, 5-positioning column, 6-pressing rod, 7-cutting knife, 8-fixing block, 9-slotted, 10-sliding block, 11-fixing arm, 12-sleeve ring, 13-telescopic cylinder, 14-clamping disc, 15-limiting ring, 16-anti-dropping head, 17-control device, 18-test column. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present application will be clearly and completely described in the embodiments of the present application in combination with the drawings in the embodiments of the present application. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present application, and are not used to limit the present application. Obviously, the described embodiments are only some embodiments of the present application, not all embodiments. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application. In the embodiments, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed application, but only represents selected embodiments of the present application.

[0023] In the description of the present application, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "front", "back", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and are not intended to indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for description purposes and cannot be understood as indicating or implying relative importance.

[0024] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected; it can be electrically connected; it can be a hydraulic oil circuit connection; it can be directly connected, or indirectly connected through an intermediate medium; it can be the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0025] Reference Figures 1 to 5A kind of automobile parts spray coating adhesion test device, device adopts drawing method, through adhesive, test column 18 is directly bonded to coating surface, through tensile testing machine, the test combination of bonding is pulled apart, the tensile force required to break the adhesion between coating and substrate is measured, the breaking strength obtained by tensile force ÷ test column 18 area is used to represent test result, unit is MPa;GB / T5210-2006, ISO 4624:2016, ASTM D4541-22 all specify specific determination method, subsequent no longer tedious. Device includes clamping table, testing device and control device 17, through clamping table, the coating sample to be measured can be fixed, testing device can be connected with test column 18, cutting device is also provided on testing device, the paint coating around test column 18 can be cut off by cutting knife, then test column 18 is pulled up by the driving device connected in testing device, at this time, the test result will be displayed on control device 17.

[0026] Clamping table includes base 1, locking mechanism is provided above base 1, coating sample can be fixed on base 1 by locking mechanism, locking mechanism includes two supporting arms 2, supporting arm 2 is vertically placed and is fixedly connected with the upper surface of base 1, top plate 3 is connected between two supporting arms 2, top plate 3 is horizontally placed and is fixedly connected with the upper end of supporting arm 2, two vertical extending threaded holes are provided on top plate 3, threaded rod is penetrated in threaded hole, pressing block 4 is connected with the lower end of threaded rod, rotating threaded rod can make pressing block 4 move along vertical direction, when coating sample is located above base 1, two ends of coating sample can be fixed by two pressing blocks 4, to prevent coating sample from moving due to stress.

[0027] Testing device is located above top plate 3, including pressure rod 6, for cutting out circle on coating, cutting knife 7 is provided on pressure rod 6, cutting knife 7 is cylindrical and located directly above the center of top plate 3, through hole is provided on top plate 3, pressure rod 6 and cutting knife 7 can pass through, the lower end of cutting knife 7 is provided with sawtooth, the circle area can be cut on the surface of coating sample by the friction between sawtooth and coating sample surface, fixed block 8 is connected with the upper end of cutting knife 7, fixed block 8 is hollow structure, the lower end of fixed block 8 is provided with opening, driving device is connected in fixed block 8, cutting knife 7 is located between pressure rod 6 and fixed block 8, sliding groove 9 is provided on the inner wall of cavity of fixed block 8, sliding block 10 is provided on the upper end of the outer wall of cutting knife 7, sliding block 10 is fixedly connected with cutting knife 7;Sliding groove 9 is composed of annular sliding groove and L-shaped sliding groove, the lower end of L-shaped sliding groove is communicated with annular sliding groove, annular sliding groove is located below L-shaped sliding groove, when sliding block 10 is located in horizontal part of L-shaped sliding groove, the lower end of pressure rod 6 is located outside cutting knife 7, rotating cutting knife 7 can make cutting knife 7 move downwards to the surface of coating sample to be measured, sliding block 10 is located in annular sliding groove during use, cutting knife 7 is rotated manually to cut coating sample.

[0028] The base 1 is provided with a positioning column 5 which is fixedly connected with the upper surface of the base 1, and the testing device is connected with the base 1 through the positioning column 5. The upper end of the fixed block 8 is connected with a fixed arm 11, the other end of the fixed arm 11 is connected with a sleeve ring 12, the sleeve ring 12 is sleeved on the upper end of the positioning column 5, and a limiting ring 15 is further sleeved on the positioning column 5. The limiting ring 15 is located below the sleeve ring 12, and the positioning column 5 is provided with a threaded groove. The limiting ring 15 is connected with the positioning column 5 through the threaded groove. The sleeve ring 12 can be moved along the axial direction of the positioning column 5 by rotating the limiting ring 15, so as to adapt to coating samples with different thicknesses. The positioning column 5 is provided with a downwardly extending groove, and the inner circle of the sleeve ring 12 is provided with a protrusion connected with the groove, so that the fixed block 8 can only move in the vertical direction.

[0029] The pressing rod 6 is located below the driving device and can be moved in the vertical direction through the driving device. The driving device can be a small telescopic air cylinder 13, wherein the telescopic air cylinder 13 is a prior art. The lower end of the pressing rod 6 is connected with a chuck 14, and the chuck 14 is provided with a radially extending long slot 19. The chuck 14 is connected with the lower end of the pressing rod 6 through two hangers. At this time, there is a space between the chuck 14 and the pressing rod 6. The test column 18 includes a base plate and an anti-escape head. The base plate and the anti-escape head 16 are connected through a clamping part which is an arc-shaped connecting block. The diameter of the anti-escape head 16 is greater than the diameter of the top end of the connecting block. When the test column 18 is translated, the clamping part can enter the long slot on the chuck 14. At this time, the anti-escape head 16 is located above the chuck 14. The test column 18 can be pulled up through the chuck 14. The upper end of the anti-escape head 16 of the test column 18 is a horizontal plane. When the test column 18 is connected with the chuck 14, the pressing rod 6 can apply pressure to the test column 18. After the glue is applied to the bottom end of the test column 18, the pressure of the pressing rod 6 can make the test column 18 more closely connected, so as to avoid air in the glue or the test column 18 being skewed to cause deviation of the test result.

[0030] The driving device is connected with a control device 17 through a wire. The control device 17 can supply power to the driving device and control the force applied to the test column 18 by the driving device. The value of the force when the test column 18 is pulled away from the coating sample can be recorded by directly observing the display screen of the control device 17.

[0031] During testing, the coating sample is placed above the base 1, the test column 18 coated with glue is placed on the chuck 14, and the test column 18 is fixed on the coating sample by pressing the test column 18 through the pressing rod 6. After the glue is completely dried, the coating sample and the base 1 are fixed together through the locking mechanism. The cutting knife 7 is rotated to cut off the coating around the test column 18. The pulling force is adjusted through the control device 17. The pulling force and the time when the sample falls off can be directly observed through the control device 17.

[0032] The above merely describes a specific implementation of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be mainly based on the protection scope of the claims.

Claims

1. An automobile parts spray coating adhesion test device, comprising a clamping table, a test device and a control device, characterized in that: The clamping table comprises a base, two fixedly connected supporting arms above the base, and a top plate connected between the supporting arms; The testing device is located above the top plate, and comprises a pressing rod, a cutting knife sleeved on the pressing rod, and a fixed block on which the pressing rod and the cutting knife are located, a driving device connected to the upper end of the pressing rod, and a through hole in the top plate through which the pressing rod and the cutting knife can pass; The fixed block is of a hollow structure, has an opening at the lower end, and has a sliding groove on the inner wall, the cutting knife is in the shape of a cylinder, has sawteeth at the lower end, and has a sliding block on the outer wall in sliding connection with the sliding groove.

2. The device for testing the adhesion of a coating layer of an automobile part according to claim 1, characterized in that: The testing device is connected to the base through a positioning column, a sleeve ring is arranged on the positioning column, a limiting ring is arranged below the sleeve ring, the limiting ring is in threaded connection with the positioning column, a fixed arm is fixedly connected to the sleeve ring, and the fixed arm is fixedly connected to the fixed block.

3. The device for testing the adhesion of a coating layer of an automobile part according to claim 1, characterized in that: A locking mechanism is arranged on the top plate, the locking mechanism comprises two threaded holes, a threaded rod passes through the threaded holes, and a pressing block is fixedly connected to the lower end of the threaded rod.

4. The device for testing the adhesion of a coating layer of an automobile part according to claim 1, characterized in that: The sliding groove is composed of an annular sliding groove and an L-shaped sliding groove, and the two are in communication to enable the cutting knife to move up and down in the fixed block.

5. The device for testing the adhesion of a coating on an automotive part according to claim 1, characterized in that: The lower end of the pressing rod is provided with a chuck, the chuck is fixedly connected to the pressing rod, the chuck is provided with a radially extending strip-shaped notch, and the chuck can be connected to the test column.

6. The device for testing the adhesion of a coating on an automotive part according to claim 5, characterized in that: The test column comprises a base plate and an anti-dropping head, the base plate and the anti-dropping head are connected through an arc-shaped connecting block, the connecting block can enter the strip-shaped notch, and at this time, the anti-dropping head is located above the chuck.

7. The device for testing the adhesion of a coating on an automotive part according to claim 1, characterized in that: The control device is connected to the driving device through a wire, and the speed and the force exerted by the driving device can be controlled through the control device.

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