A device for detecting the wear resistance of a pvd coating

Abstract

The utility model discloses a kind of PVD coating abrasion resistance detection devices, it is related to coating detection technical field, including drive electric cylinder, the movable end of drive electric cylinder is connected with mounting bracket, the front end fixedly connected with link rod of mounting bracket, the outside wall of link rod is fixedly connected with test roller shell, the top of test roller shell is fixedly connected with motor suspension bracket, the upper side wall middle position of motor suspension bracket is equipped with movable electric cylinder, the movable end of movable electric cylinder is connected with expansion wedge-shaped frame, the rear side wall of expansion wedge-shaped frame is connected fixedly connected with tail rod. The utility model is moved to forward side by movable electric cylinder drive expansion wedge-shaped frame, and then using tail rod drive slide rail to move to forward side, slide rail is dragged by slider and hanger rod, and test roller is close to scraper, and then the coating adhered to the surface of test roller is scraped off, and then avoid the problem of coating falling off to cause test accuracy to reduce.

Description

Technical Field

[0001] This utility model relates to the field of coating testing technology, and in particular to a device for testing the wear resistance of PVD coatings. Background Technology

[0002] Physical vapor deposition (PVD) coating technology is a surface treatment process that transforms solid materials into a gaseous phase through physical processes and deposits them onto the surface of a workpiece to form a functional thin film. This technology can impart excellent properties such as high hardness, low coefficient of friction, and good chemical stability to the workpiece surface without altering the characteristics of the substrate material. It is widely used in machinery manufacturing, mold processing, and electronic devices. Wear resistance testing of PVD coatings can effectively evaluate their wear resistance during actual use, providing data support for optimizing coating process parameters and extending product lifespan, which is of great significance for ensuring the quality and efficiency of industrial production.

[0003] In the abrasion resistance testing of PVD coatings, a test roller is typically used to slide back and forth across the workpiece surface to simulate friction and wear behavior under actual working conditions, thereby determining the abrasion resistance of the coating on the workpiece surface. However, during the test, due to factors such as the adhesion between the coating and the substrate and uneven surface hardness distribution, some coating may detach from the workpiece surface and adhere to the test roller surface. As the test continues, the coating adhering to the test roller alters its surface roughness and frictional characteristics, leading to distortion in the measured data of friction force and wear during the test. Consequently, the final abrasion resistance test results deviate from the true values, significantly reducing the accuracy and reliability of the abrasion resistance test.

[0004] Based on the above viewpoints, those skilled in the art have proposed a device for testing the wear resistance of PVD coatings. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a PVD coating abrasion resistance testing device. This device uses a movable electric cylinder to move an expanding wedge frame forward, which in turn uses a tail rod to move a slide rail forward. The slide rail, through a slider and a connecting rod, drags a scraper close to the test roller, thereby scraping off the detached coating adhering to the surface of the test roller. This avoids the problem of reduced test accuracy caused by the detached coating.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A PVD coating abrasion resistance testing device includes a drive cylinder, a mounting bracket connected to the movable end of the drive cylinder, a connecting rod fixedly connected to the front end of the mounting bracket, a test roller shell fixedly connected to the outer side wall of the connecting rod, a motor suspension bracket fixedly connected to the top of the test roller shell, a movable cylinder installed at the middle position of the upper side wall of the motor suspension bracket, an expanding wedge frame connected to the movable end of the movable cylinder, a tail rod fixedly connected to the rear side wall of the expanding wedge frame, a slide rail slidably connected to the outer side wall of the tail rod, a slider fixedly connected to the bottom of the slide rail, a hanging rod fixedly connected to the lower side wall of the slider, a scraper connected to the bottom pin of the hanging rod, and a test roller connected to the front end of the test roller shell by a pin.

[0008] Preferably, the two side walls of the motor suspension bracket are slidably connected with fastening rods, and spring plates are fixedly connected to the side walls of the fastening rods that are close to each other. A connecting spring is fixedly connected between the two spring plates. The two side walls of the expansion wedge frame are tightly attached to the two inner walls, and the bottom ends of the two fastening rods are inserted into the rotating shaft of the test roller.

[0009] Preferably, the upper sidewall of the test roller housing has a straight groove.

[0010] Preferably, the test roller has a protrusion inside its rotating shaft.

[0011] Preferably, the test roller shell has inclined grooves on both sides, and the scraper is slidably connected to the inside of the inclined grooves on both sides.

[0012] Preferably, a collection box is snapped into the inside of the test roller housing, and the collection box is located below the scraper.

[0013] This utility model has the following beneficial effects:

[0014] In this invention, the movable electric cylinder drives the expansion wedge frame to move forward, and then the tail rod drives the slide rail to move forward. The slide rail drags the scraper close to the test roller through the slider and the hook rod, thereby scraping off the peeling coating attached to the surface of the test roller, thus avoiding the problem of reduced test accuracy caused by the peeling coating.

[0015] In this invention, during testing, the drive cylinder moves the test roller across the workpiece surface to perform a wear resistance test. When it is necessary to remove the coating adhering to the test roller, the movable cylinder moves the spring plate forward, thereby moving the two fastening rods away from each other. At this time, the test roller is no longer affected by the fastening rods and will roll on the workpiece surface. During the rolling, the coating adhering to the surface of the test roller will be fully scraped off. At the same time, it will change the contact position between the test roller and the workpiece, thereby ensuring that the contact surface between the test roller and the workpiece is effective for a long time.

[0016] In this invention, while the electric cylinder drives the scraper to move forward, the scraper slides along the direction of the inclined groove, causing the inclined groove to tilt and thus fit against the outer wall of the test roller, preventing damage to the scraper when the test roller rotates. The scraped coating debris will be guided by the scraper to the collection box for collection. Attached Figure Description

[0017] Figure 1 This is an overall diagram of a PVD coating abrasion resistance testing device proposed in this utility model;

[0018] Figure 2 This is a schematic diagram showing the hidden drive electric cylinder and mounting bracket in a PVD coating wear resistance testing device proposed in this utility model.

[0019] Figure 3 This is a rear view of the PVD coating wear resistance testing device proposed in this utility model, after concealing the drive electric cylinder and the mounting bracket.

[0020] Figure 4 for Figure 3 Enlarged view of point A along the middle edge;

[0021] Figure 5 This is a schematic diagram of the test roller shell hidden in the PVD coating abrasion resistance testing device proposed in this utility model.

[0022] Legend:

[0023] 1. Drive cylinder; 2. Mounting bracket; 3. Test roller housing; 4. Connecting rod; 5. Motor suspension bracket; 6. Movable cylinder; 7. Expanding wedge frame; 8. Fastening rod; 9. Spring plate; 10. Connecting spring; 11. Inclined groove; 12. Collection box; 13. Tail rod; 14. Slide rail; 15. Straight groove; 16. Slider; 17. Hanging rod; 18. Scraper; 19. Test roller. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Example: Refer to Figures 1-5This utility model provides an embodiment of a PVD coating wear resistance testing device, including a drive cylinder 1, a mounting bracket 2 connected to the movable end of the drive cylinder 1, a connecting rod 4 fixedly connected to the front end of the mounting bracket 2, a test roller shell 3 fixedly connected to the outer side wall of the connecting rod 4, a motor suspension bracket 5 fixedly connected to the top of the test roller shell 3, a movable cylinder 6 installed at the middle position of the upper side wall of the motor suspension bracket 5, an expansion wedge frame 7 connected to the movable end of the movable cylinder 6, a tail rod 13 fixedly connected to the rear side wall of the expansion wedge frame 7, a slide rail 14 slidably connected to the outer side wall of the tail rod 13, a slider 16 fixedly connected to the bottom of the slide rail 14, a hanging rod 17 fixedly connected to the lower side wall of the slider 16, a scraper 18 connected to the bottom pin of the hanging rod 17, and the test roller shell 3... The test roller 19 is connected to the front pin of the internal part. The mounting bracket 2 is driven to slide back and forth by the drive electric cylinder 1, which in turn drives the test roller 19 to slide along the surface of the workpiece to be tested, thereby performing wear resistance testing on the PVD coating of the workpiece surface. In order to avoid the coating falling off and adhering to the test roller 19, which would cause changes in the surface roughness and texture of the test roller 19 and thus affect the accuracy of the test, after a certain period of testing, the movable electric cylinder 6 will drive the expansion wedge frame 7 to move forward, and then use the tail rod 13 to drive the slide rail 14 to move forward. The slide rail 14 drags the scraper 18 close to the test roller 19 through the slider 16 and the hanging rod 17, thereby scraping off the coating adhering to the surface of the test roller 19, thus avoiding the problem of reduced test accuracy caused by the falling coating.

[0026] The motor suspension bracket 5 has two side walls with limiting sliding connections of fastening rods 8. Spring plates 9 are fixedly connected to the side walls where the fastening rods 8 are close to each other. A connecting spring 10 is fixedly connected between the two spring plates 9. The two side walls of the expanding wedge bracket 7 are tightly attached to the two inner walls. The bottom ends of the two fastening rods 8 are inserted into the rotating shaft of the test roller 19. The rotating shaft of the test roller 19 has protrusions inside. During the testing phase, the two fastening rods 8 extend into the rotating shaft of the test roller 19. The rotating shaft has protrusions with a high coefficient of friction. When the fastening rods 8 contact the protrusions inside the test roller 19, the friction is high, leading to… The test roller 19 cannot rotate. During testing, the drive cylinder 1 drives the test roller 19 to slide on the workpiece surface, thereby performing a wear resistance test on the workpiece. When it is necessary to remove the coating adhering to the test roller 19, the movable cylinder 6 drives the spring plate 9 to move forward, thereby causing the two fastening rods 8 to move away from each other. At this time, the test roller 19 is no longer affected by the fastening rods 8 and will roll on the workpiece surface. When rolling, the coating adhering to the surface of the test roller 19 will be fully scraped off. At the same time, it will change the contact position between the test roller 19 and the workpiece, thereby ensuring that the contact surface between the test roller 19 and the workpiece is effective for a long time.

[0027] The upper side wall of the test roller housing 3 has a straight groove 15 to ensure the stability of the slide rail 14 during movement. The two side walls of the test roller housing 3 have inclined grooves 11, and the two sides of the scraper 18 are slidably connected inside the inclined grooves 11. When the movable electric cylinder 6 drives the scraper 18 to move forward, the scraper 18 slides along the direction of the inclined grooves 11, so that the inclined grooves 11 are tilted and thus fit against the outer wall of the test roller 19, preventing the scraper 18 from being damaged when the test roller 19 rotates. A collection box 12 is snapped into the inside of the test roller housing 3. The collection box 12 is located below the scraper 18. When the scraper 18 is tilted, the coating debris it scrapes off will be guided by the scraper 18 to the collection box 12 for collection.

[0028] Working Principle: This device drives the mounting bracket 2 to slide back and forth via the electric cylinder 1, which in turn drives the test roller 19 to slide along the surface of the workpiece to be tested, thereby performing a wear resistance test on the PVD coating on the surface of the workpiece. To prevent the coating from peeling off and adhering to the test roller 19, which would change the surface roughness and texture of the test roller 19 and affect the accuracy of the test, after a certain period of testing, the movable electric cylinder 6 will drive the expanding wedge frame 7 to move forward, which in turn uses the tail rod 13 to drive the slide rail 14 to move forward. The slide rail 14, through the slider 16 and the hanging rod 17, drags the scraper 18 close to the test roller 19, thereby scraping off the peeling coating adhering to the surface of the test roller 19, thus avoiding the problem of reduced test accuracy caused by peeling coating. During the testing phase, two fastening rods 8 extend into the inside of the rotating shaft of the test roller 19. The inside of the rotating shaft is equipped with high friction coefficient protrusions. When the fastening rods 8 contact the protrusions inside the test roller 19, they will be frictionally removed. The force is too large, causing the test roller 19 to be unable to rotate. During the test, the drive cylinder 1 drives the test roller 19 to slide on the surface of the workpiece, thereby performing a wear resistance test on the workpiece. When it is necessary to remove the coating adhering to the test roller 19, the movable cylinder 6 drives the spring plate 9 to move forward, thereby driving the two fastening rods 8 to move away from each other. At this time, the test roller 19 is no longer affected by the fastening rods 8 and will roll on the surface of the workpiece. When rolling, the coating adhering to the surface of the test roller 19 will be fully scraped off. At the same time, it will change the contact position between the test roller 19 and the workpiece, thereby ensuring that the contact surface between the test roller 19 and the workpiece is effective for a long time. While the movable cylinder 6 drives the scraper 18 to move forward, the scraper 18 slides along the direction of the inclined groove 11, so that the inclined groove 11 tilts and fits against the outer wall of the test roller 19, avoiding damage to the scraper 18 when the test roller 19 rotates. When the scraper 18 tilts, the scraped coating debris will be guided by the scraper 18 to the collection box 12 for collection.

[0029] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A PVD coating wear resistance testing device, comprising a drive electric cylinder (1), characterized in that: A mounting bracket (2) is connected to the movable end of the drive cylinder (1). A connecting rod (4) is fixedly connected to the front end of the mounting bracket (2). A test roller shell (3) is fixedly connected to the outer side wall of the connecting rod (4). A motor suspension bracket (5) is fixedly connected to the top of the test roller shell (3). A movable cylinder (6) is installed in the middle of the upper side wall of the motor suspension bracket (5). An expansion wedge frame (7) is connected to the movable end of the movable cylinder (6). A tail rod (13) is fixedly connected to the rear side wall of the expansion wedge frame (7). A slide rail (14) is slidably connected to the outer side wall of the tail rod (13). A slider (16) is fixedly connected to the bottom of the slide rail (14). A hanging rod (17) is fixedly connected to the lower side wall of the slider (16). A scraper (18) is connected to the bottom pin of the hanging rod (17). A test roller (19) is connected to the front end of the test roller shell (3).

2. The PVD coating wear resistance testing device according to claim 1, characterized in that: The two side walls of the motor suspension bracket (5) are slidably connected with fastening rods (8). Spring plates (9) are fixedly connected to the side wall of the fastening rods (8) that are close to each other. A connecting spring (10) is fixedly connected between the two spring plates (9). The two side walls of the expansion wedge frame (7) are tightly attached to the two inner walls, and the bottom ends of the two fastening rods (8) are inserted into the rotating shaft of the test roller (19).

3. The PVD coating wear resistance testing device according to claim 1, characterized in that: The upper side wall of the test roller housing (3) is provided with a straight groove (15).

4. The PVD coating wear resistance testing device according to claim 1, characterized in that: The test roller (19) has protrusions inside its rotating shaft.

5. The PVD coating wear resistance testing device according to claim 1, characterized in that: The test roller housing (3) has inclined grooves (11) on both sides, and the scraper (18) is slidably connected to the inside of the inclined grooves (11) on both sides.

6. The PVD coating wear resistance testing device according to claim 4, characterized in that: The test roller housing (3) has a collection box (12) inside, which is located below the scraper (18).

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