Device for cyclically testing adhesive force of zinc coating

Abstract

The invention discloses a cyclic testing device for adhesive force of a zinc coating, and relates to the technical field of mechanical property detection. The device comprises a sample base and a clamp installed on the sample base, a rotating disc is arranged on one side of the sample base, a friction mechanism and an adhesion mechanism are arranged in the circumferential direction of the rotating disc, the friction mechanism comprises a first support fixed to the rotating disc, and a servo motor is installed on the upper portion of the first support; a shaft of the servo motor is connected to the middle of a swing rod located on one side of the shaft through two hinged connecting rods, and the upper end of the swing rod is installed on the first support through the shaft. The lower end face of the friction piece is a cambered surface with the axis parallel to the axis of the swing rod. The friction mechanism is arranged, the friction piece can be controlled by the servo motor through the swing rod to rub the surface of the sample, so that the stress of the sample in each test is consistent, and the comparability of test results is improved.

Description

Technical Field

[0001] This invention relates to a cyclic testing device for the adhesion of galvanized coatings, and pertains to the field of mechanical performance testing technology. Background Technology

[0002] Currently, the most common methods for testing the adhesion of galvanized coatings are the cross-cut method or the friction method. Although these methods are simple to operate, they generally involve manual rubbing or cross-cutting of the sample surface during the test, which cannot guarantee the uniformity of the force on the sample. This makes it impossible to have consistent starting conditions for each test, affecting the comparability and repeatability of the test results. Summary of the Invention

[0003] The purpose of this invention is to design a cyclic testing device for the adhesion of galvanized layers that can improve the consistency of testing.

[0004] This invention includes a sample base and a clamp mounted on the sample base. A turntable is provided on one side of the sample base, and a friction mechanism and an adhesion mechanism are respectively provided along the circumference of the turntable. The friction mechanism includes a first bracket fixed on the turntable, a servo motor mounted on the upper part of the first bracket, and the shaft of the servo motor is connected to the middle of a swing rod located on one side of its shaft through two hinged connecting rods. The upper end of the swing rod is mounted on the first bracket through a shaft. A friction element is fixed to the lower end of the swing rod, and the lower end surface of the friction element is an arc surface with its axis parallel to the axis of the swing rod. The adhesion mechanism includes a cylinder with its cylinder body fixed on the turntable. The piston rod of the cylinder is upward and connected to one side of a downwardly bent U-shaped frame. A tape mounting bracket is provided at the bottom end of the other side of the U-shaped frame.

[0005] Furthermore, the lower end of the swing rod is provided with a dovetail groove, and the upper end of the mounting base with the friction element is provided with a dovetail-shaped connecting mechanism that matches the dovetail groove and is inserted into the dovetail groove to connect with the swing rod. The side of the dovetail groove is provided with a light hole that communicates with it, and the dovetail-shaped connecting mechanism is provided with a corresponding threaded hole. The bolt passes through the light hole and is screwed into the screw hole.

[0006] Furthermore, the swing rod consists of an upper swing rod and a lower swing rod connected to each other. The upper part of the lower swing rod is inserted into the adjustment groove at the lower part of the upper swing rod. Corresponding to the adjustment groove, the upper swing rod is provided with an elongated hole along the length of the swing rod. A screw is fixed on one side of the lower swing rod, and the screw passes through the elongated hole and is screwed into a nut.

[0007] Furthermore, the fixture includes a fixed clamping plate located on one side of the sample base and a movable clamping plate parallel to it. An adjusting rod passes through the fixed clamping plate and the movable clamping plate. The part of the adjusting rod that mates with the fixed clamping plate is a smooth round rod, which is dynamically engaged with the fixed clamping plate. A nut is fixed at the through hole where the movable clamping plate mates with the adjusting rod, and the adjusting rod is screwed into the nut. The adjusting rod on the outside of the fixed clamping plate is connected to a handwheel. A guide rod parallel to the adjusting rod is also provided on the fixed clamping plate, and the guide rod passes through the movable clamping plate and is dynamically engaged with it.

[0008] Furthermore, a second support with a gap between the friction mechanism and the adhesion mechanism is provided on the circumference of the turntable, and a galvanized layer detection mechanism is provided on the second support.

[0009] The present invention includes a friction mechanism that uses a servo motor to control the friction component to rub the sample surface via a swing arm, ensuring that the sample is subjected to consistent force in each test and improving the comparability of test results.

[0010] The present invention is equipped with a friction mechanism, an adhesion mechanism and a zinc plating layer detection mechanism on a turntable, which can perform different processes on the sample by switching the position of each mechanism, thereby improving the testing efficiency. Attached Figure Description

[0011] Figure 1 This is a top view of an embodiment of the present invention; Figure 2 for Figure 1 View of the second support section in direction A; Figure 3 for Figure 2 The left view; Figure 4 for Figure 1 Front view of the friction mechanism section; Figure 5 for Figure 4 A magnified view of a section at point B in the middle; Figure 6 for Figure 4 A magnified view of a section at point C; Figure 7 for Figure 4 Left view of the friction mechanism section; Figure 8 This embodiment shows the initial state of the friction component during use. The components include: 1. Sample base; 2. Fixed clamping plate; 3. Movable clamping plate; 4. Adjusting rod; 5. Handwheel; 6. Guide rod; 7. Turntable; 8. First bracket; 9. Servo motor; 10. Upper swing arm; 11. Lower swing arm; 12. Adjusting groove; 13. Screw; 14. Claw nut; 15. First connecting rod; 16. Second connecting rod; 17. Swing shaft; 18. Mounting seat; 19. Friction component; 20. Dovetail connecting mechanism; 21. Bolt; 22. Cylinder; 23. U-shaped frame; 24. Tape mounting frame; 25. Second bracket; 26. Galvanized layer detection mechanism; 27. Support frame; 28. Rotating motor. Detailed Implementation

[0012] by Figure 4 Define the up, down, left, right, front, and back directions in this embodiment.

[0013] As shown in the figure, this embodiment includes a sample base 1, which is fixedly installed on a workbench. A clamp for holding the sample is provided on top of the sample base 1. The clamp includes a fixed clamping plate 2, which is located behind the sample base 1 and fixedly connected to it. A movable clamping plate 3 is provided in front of the fixed clamping plate 2, parallel to it, and is movably connected to the sample base 1. An adjusting rod 4 is provided on the left side of the fixed clamping plate 2. The adjusting rod 4 passes through the fixed clamping plate 2 and the movable clamping plate 3. In this embodiment, the front of the adjusting rod 4 is threaded, and the rear is a smooth round rod. The round rod part is dynamically fitted with the fixed clamping plate 2 through a bearing structure. A nut is fixedly installed on the movable clamping plate 3 through the through hole of the adjusting rod 4, and the threaded part of the adjusting rod 4 is screwed into the nut. A handwheel 5 is fixedly installed on the part of the adjusting rod 4 extending to the rear side of the fixed clamping plate 2, which can control the rotation of the adjusting rod 4. A guide rod 6 is provided on the left side of the adjusting rod. The guide rod 6 is parallel to the adjusting rod 4. Its rear end is fixedly connected to the fixed clamping plate 2, and its front part passes through the movable clamping plate 3 and is slidably connected to it. When in use, the handwheel 5 can be turned to control the movement of the movable clamping plate 3 back and forth.

[0014] A turntable 7 is provided on the right side of the sample base 1. The turntable 7 is fan-shaped, and a support frame 27 is provided on the right side of its center. The support frame 27 is fixedly installed on the workbench, and a rotating motor 28 is fixedly installed on its upper plate. The rotating shaft of the rotating motor 28 extends downward, passes through the support frame 27, and is fixedly connected to the center of the turntable 7. When in use, the rotating motor 28 is started, which can control the rotation of the turntable 7.

[0015] The upper surface of the turntable 7 is provided with a friction mechanism, an adhesion structure, and a zinc plating layer detection mechanism along its circumference. The friction mechanism includes a first support 8, which is fixedly connected to the upper surface of the turntable 7 and is L-shaped extending backward. A servo motor 9 is fixedly installed at the rear of its upper end. The rotation axis of the servo motor 9 extends to the left and is fixedly connected to one end of a first connecting rod 15. A second connecting rod 16 is provided at the other end of the first connecting rod 15 and is hinged to it. A swing rod is provided at the other end of the second connecting rod 16. In this embodiment, the swing rod consists of an upper swing rod 10 and a lower swing rod 11 connected to each other. The structure comprises an upper swing arm 10 with an adjustment groove 12 at its lower end, and a lower swing arm 11 with an upper part that is structurally matched with the adjustment groove 12 and can be slidably inserted into the adjustment groove 12. An elongated hole extending along the length of the upper swing arm 10 is provided at the left end of the upper swing arm 10 at a position corresponding to the adjustment groove 12, and the elongated hole communicates with the adjustment groove 12. A screw 13 is fixedly installed at the left end of the lower swing arm 11. The screw 13 is sized to correspond to the adjustment groove 12, and passes through the elongated hole and is screwed with a horn nut 14. In use, the length of the swing arm can be adjusted along the elongated hole by the screw 13, and the horn nut 14 is used to press and fix it. A rotating shaft structure is fixedly installed on the right side of the upper swing arm 10 near the middle position, and the other end of the second connecting rod 16 is rotatably connected to the rotating shaft; a swing shaft 17 is fixedly installed on the first bracket 8 at the upper right end of the upper swing arm 10, and the upper swing arm 10 is rotatably connected to the swing shaft 17. When in use, the servo motor 9 is started to control the rotation of the first connecting rod 15, which can push the swing arm to swing left and right around the swing shaft 17 as the center through the second connecting rod 16.

[0016] The lower end of the lower swing arm 11 is provided with a dovetail groove structure, and a mounting base 18 is provided below it. The upper end of the mounting base 18 is provided with a dovetail-shaped connecting mechanism 20 that matches the dovetail groove. The dovetail-shaped connecting mechanism 20 can be installed into the dovetail groove by sliding. A light hole communicating with the dovetail groove is provided on the left side, and a corresponding threaded hole is provided on the dovetail-shaped connecting mechanism 20. In use, a bolt 21 can be passed through the light hole and screwed into the threaded hole to connect the mounting base 18 and the lower swing arm 11. In this embodiment, three bolts 21 are provided to improve the stability of the mounting base 18. A friction element 19 is fixedly installed on the bottom of the mounting base 18. The lower end of the friction element 19 is an arc surface with its axis parallel to the axis of the swing arm to increase the contact area between the friction element 19 and the sample surface during the swing of the swing arm.

[0017] In this embodiment, the friction element 19 can be replaced with a cross-cutting tool to perform a cross-cutting test on the sample surface.

[0018] An adhesion mechanism is located in front of the friction mechanism and includes a cylinder 22. The cylinder body of the cylinder 22 is fixedly mounted on the upper surface of the turntable 7. Its piston rod extends upward and is fixedly connected to one side of the U-shaped frame 23. The U-shaped frame 23 is bent downward, and a tape mounting bracket 24 is provided at the bottom of the other side. In this embodiment, the lower end of the tape mounting bracket 24 is provided with multiple layers of tape with the adhesive side facing down. When in use, it can be controlled by the cylinder 22 to move downward to stick the zinc plating layer on the sample surface so as to judge the adhesion of the zinc plating layer later. Before bonding, the bottom layer of tape can be peeled off to ensure the adhesiveness of the tape and ensure the consistency of the test.

[0019] A galvanized layer detection mechanism 26 is provided on the front side of the adhesion mechanism. The galvanized layer detection mechanism 26 includes a second bracket 25, which has the same structure as the support frame 27. Its lower end is fixedly mounted on the turntable 7, and a visual recognition device is fixedly mounted on its upper part. The recognition end of the visual recognition device passes downward through the second bracket 25. In use, the galvanized layer detection mechanism 26 needs to be rotated above the sample, and the visual recognition device is used to photograph the galvanized layer on the sample surface and judge its adhesion. In this embodiment, the visual recognition device is prior art and will not be described in detail here.

[0020] In this embodiment, the sample is first placed on the sample base 1, with the right end of the sample base 1 facing each other. The sample is then clamped and fixed by rotating the handwheel 5. After completion, the servo motor 9 is started to control the swing arm to swing, causing the friction element 19 to rub the zinc plating layer on the sample surface. After the set time is reached, the servo motor is turned off. Then, the turntable 7 is rotated by the rotating motor 28 to move the tape mounting bracket 24 above the sample. After it is in place, the cylinder 22 is started to move the tape mounting bracket 24 down. The zinc plating layer on the sample surface is peeled off by pasting. After pasting is completed, the cylinder 22 is reset, and the rotating motor 28 controls the turntable 7 to rotate the zinc plating layer detection mechanism 26 above the sample. The sample surface is photographed and the adhesion of the zinc plating layer is judged.

Claims

1. A cyclic testing device for the adhesion of a galvanized layer, comprising a sample base and a fixture mounted on the sample base, characterized in that: A turntable is provided on one side of the sample base. A friction mechanism and an adhesion mechanism are respectively provided along the circumference of the turntable. The friction mechanism includes a first bracket fixed on the turntable. A servo motor is installed on the upper part of the first bracket. The shaft of the servo motor is connected to the middle of a swing rod located on one side of its shaft through two hinged connecting rods. The upper end of the swing rod is mounted on the first bracket through a shaft. A friction element is fixed to the lower end of the swing rod. The lower end surface of the friction element is an arc surface with its axis parallel to the axis of the swing rod. The adhesion mechanism includes a cylinder whose cylinder body is fixed on the turntable. The piston rod of the cylinder is upward and connected to one side of a downwardly bent U-shaped frame. A tape mounting bracket is provided at the bottom end of the other side of the U-shaped frame.

2. The cyclic testing device for zinc coating adhesion according to claim 1, characterized in that: The lower end of the swing rod is provided with a dovetail groove. The upper end of the mounting base with the friction element is provided with a dovetail-shaped connecting mechanism that matches the dovetail groove and is inserted into the dovetail groove to connect with the swing rod. The side of the dovetail groove is provided with a light hole that communicates with it. The dovetail-shaped connecting mechanism is provided with a corresponding threaded hole. The bolt passes through the light hole and is screwed into the screw hole.

3. The cyclic testing device for zinc coating adhesion according to claim 1 or 2, characterized in that: The swing arm consists of an upper swing arm and a lower swing arm connected to each other. The upper part of the lower swing arm is inserted into the adjustment groove at the lower part of the upper swing arm. Corresponding to the adjustment groove, the upper swing arm is provided with an elongated hole along the length of the swing arm. A screw is fixed on one side of the lower swing arm, and the screw passes through the elongated hole and is screwed into a nut.

4. The cyclic testing device for zinc coating adhesion according to claim 1 or 2, characterized in that: The fixture includes a fixed clamping plate located on one side of the sample base and a movable clamping plate parallel to it. An adjusting rod passes through the fixed clamping plate and the movable clamping plate. The part of the adjusting rod that mates with the fixed clamping plate is a smooth round rod, which is dynamically engaged with the fixed clamping plate. A nut is fixed at the through hole where the movable clamping plate mates with the adjusting rod, and the adjusting rod is screwed into the nut. The adjusting rod on the outside of the fixed clamping plate is connected to a handwheel. A guide rod parallel to the adjusting rod is also provided on the fixed clamping plate, which passes through the movable clamping plate and is dynamically engaged with it.

5. The cyclic testing device for zinc coating adhesion according to claim 1 or 2, characterized in that: A second support with a gap between the friction mechanism and the adhesion mechanism is set along the circumference of the turntable, and a galvanized layer detection mechanism is set on the second support.

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