Detection structure for detecting grinding effect of electrode cap and use method

Abstract

The invention belongs to the technical field of electrode cap detection, and particularly relates to a detection structure for detecting the grinding effect of an electrode cap and a use method. Comprising a mounting rod, a camera and a spray head, a first support and a second support are connected to the mounting rod, the camera is connected to the first support, a buffer assembly is arranged on the second support, the spray head is movably connected to the buffer assembly, and the camera and the spray head are electrically connected with a control device. The control device instructs the spray head to spray high-pressure airflow according to data acquired by the camera, the welding gun moves to a designated position after grinding the surface of the electrode cap, the spray head sprays air to blow away water drops and foreign matter on the electrode cap, the camera begins to shoot the electrode cap, and the surface smoothness of the electrode cap is judged through the control device. Judging whether grinding succeeds or not, if yes, entering the next machining step, and if not, spraying air again through the spray head; the influence of jet vibration of the nozzle on the camera can be reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of electrode cap detection, and particularly relates to a detection structure and a use method for detecting the grinding effect of an electrode cap. Background Art

[0002] Electrode caps are widely used in industries such as automobile manufacturing, household appliance production, and metal structure processing, and are mainly used for resistance spot welding, projection welding, and seam welding. After being used for a period of time, due to the high temperature and mechanical wear during the welding process, the surface of the electrode cap becomes uneven or even deformed, which will affect the welding quality and the service life of the electrode cap. Therefore, regularly grinding the electrode cap can restore its original shape and size, and improve the welding quality and efficiency. Electrode cap grinding is an important operation in the resistance welding process, aiming to maintain the good state of the electrode cap to ensure the welding quality and efficiency. The replacement frequency of the electrode cap depends on multiple factors, including welding materials, welding equipment, welding parameters, and production environment.

[0003] In order to detect the surface smoothness and grinding effect of the ground electrode cap, and to remove possible water droplets and foreign matters remaining on the surface of the electrode cap after detection, in the prior art, the state of the surface of the electrode cap is generally imaged and detected by a camera, and then the acquired data is uploaded to a control device. The control device then analyzes the data and outputs corresponding instructions according to the analysis results, and the water droplets and foreign matters on the surface of the electrode cap are blown off by actuators such as gas nozzles through the instructions. In order to reduce the operation steps and improve the use efficiency during the use process, generally, the camera for detection and the nozzle for removing water droplets and foreign matters are arranged on the same bracket, reducing the installation and debugging time for each use.

[0004] However, in the actual use process, when the nozzle sprays high-pressure air flow to remove water droplets and foreign matters on the surface of the electrode cap, a relatively large backward acting force will be generated. Frequent spraying of air flow by the nozzle will cause the camera to vibrate accordingly, and the stability of the camera directly affects the detection accuracy of the state of the surface of the electrode cap. Based on this, a detection structure and a use method for detecting the grinding effect of an electrode cap are proposed. Summary of the Invention

[0005] In order to solve the above problems existing in the prior art, the present invention provides a detection structure and a use method for detecting the grinding effect of an electrode cap.

[0006] The object of the present invention can be achieved by the following technical solutions:

[0007] A detection structure for detecting the grinding effect of an electrode cap comprises a mounting rod, a camera and a nozzle, wherein a first bracket and a second bracket are connected to the mounting rod, the camera is connected to the first bracket, a buffer assembly is arranged on the second bracket, the nozzle is movably connected to the buffer assembly, a control device is arranged on the mounting rod, the camera and the nozzle are electrically connected to the control device respectively, and the control device instructs the nozzle to spray a high-pressure airflow according to data acquired by the camera.

[0008] Furthermore, the cameras and the nozzles are provided in two groups respectively, and the two cameras are located at the upper and lower sides of the two nozzles.

[0009] Furthermore, one end of the second bracket is connected to the mounting rod, and the other end is connected to the buffer assembly, the buffer assembly includes a telescopic frame, the telescopic frame is slidably set on the second bracket, a through hole is opened on the telescopic frame, a spring is arranged between the telescopic frame and the second bracket, the nozzle moves back and forth in the through hole and pushes the telescopic frame to compress or stretch the spring for buffering and shock absorption.

[0010] Furthermore, the abutting surface between the side wall of the nozzle and the side wall of the through hole is an inclined surface which gradually decreases from front to back.

[0011] Furthermore, it also includes a telescopic plate, which is transmission-connected to the telescopic frame. The telescopic plate extends as the telescopic frame extends and pushes the nozzle to rise, and retracts as the telescopic frame retracts and releases the nozzle to descend.

[0012] Furthermore, a first gear and a second gear are transmission-connected between the inner wall of the telescopic frame and the telescopic plate.

[0013] Furthermore, the contact surface between the telescopic plate and the nozzle is an inclined surface.

[0014] A method for using a detection structure for detecting the grinding effect of an electrode cap. After the welding gun has finished grinding the surface of the electrode cap, it moves to a specified position. The nozzle sprays air to blow away water droplets and foreign matter on the electrode cap. The camera starts to photograph the electrode cap, and the control device determines the surface smoothness of the electrode cap, thereby determining whether the grinding is successful. When the detection result is yes, the next processing step is entered. When the detection result is no, the nozzle sprays air again.

[0015] The beneficial effects of the present invention are:

[0016] (1) The camera and the nozzle are respectively connected to the mounting rod through the first bracket and the second bracket. The first bracket of the camera is an "S"-shaped structure, and the camera is arranged in the concave part of the first bracket. When the camera is connected to the mounting rod through the first bracket, if vibration occurs, the "S"-shaped structure of the first bracket can filter out a part of the vibration. On the other hand, the nozzle is also connected to the mounting rod through the second bracket, and a buffer assembly is arranged on the second bracket. Since the reason for the vibration generated after the nozzle sprays gas is that the nozzle will generate a recoil force, that is, the nozzle has a tendency to move in the opposite direction of the gas spraying. During the process of continuously blowing foreign objects from the electrode cap, the repeated blowing actions cause the nozzle to move back and forth frequently, which can generate vibration. By setting a buffer assembly between the nozzle and the second bracket, this problem can be avoided;

[0017] (2) A first gear and a second gear are drivingly connected between the inner wall of the telescopic frame and the telescopic plate; the telescopic plate is at the bottom of the nozzle, the inner lower surface of the telescopic frame is provided with teeth, and the upper surface of the telescopic plate is also provided with teeth. A first gear and a second gear are meshed in the middle position between the two. When the telescopic frame moves outwards, through the transmission of the two gears, the telescopic plate also moves outwards accordingly, and presses against the bottom of the nozzle and jacks up the nozzle, so that the gas spraying position of the nozzle is translated backwards and then jacked up by the telescopic plate to spray towards the original position, avoiding the deviation of the gas spraying position of the nozzle. Description of the Drawings

[0018] For the convenience of those skilled in the art to understand, the present invention will be further described below with reference to the accompanying drawings.

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 It is a schematic top view of the nozzle of the present invention moving forward in the through hole;

[0021] Figure 3 It is a schematic top view of the nozzle of the present invention moving backward in the through hole;

[0022] Figure 4 It is a schematic internal structure diagram of the nozzle of the present invention moving upward in the through hole;

[0023] Figure 5 It is a schematic internal structure diagram of the nozzle of the present invention moving downward in the through hole;

[0024] Description of the reference numerals: 1, leg; 2, mounting rod; 3, camera; 4, nozzle; 51, second bracket; 52, telescopic frame; 53, support plate; 54, spring; 55, first gear; 56, telescopic plate; 57, second gear. Detailed Description of the Invention

[0025] To further elaborate on the technical means and effects adopted by the present invention to achieve the intended invention purpose, the following will, in conjunction with the accompanying drawings and preferred embodiments, elaborate in detail on the specific implementation manners, structures, features, and their effects according to the present invention as follows.

[0026] As Figures 1 - 5 shown, a detection structure for detecting the grinding effect of an electrode cap of the present invention includes a mounting rod 2, a camera 3, and a spray head 4. A first bracket and a second bracket 51 are connected to the mounting rod 2. The camera 3 is connected to the first bracket, a buffer assembly is provided on the second bracket 51, the spray head 4 is movably connected to the buffer assembly, a control device is provided on the mounting rod 2, the camera 3 and the spray head 4 are respectively electrically connected to the control device, and the control device instructs the spray head 4 to spray high-pressure air flow according to the data obtained by the camera 3;

[0027] Since generally the camera 3 for detection and the spray head 4 for removing water droplets and foreign objects are arranged on the same bracket, the installation and debugging time each time of use is reduced. However, during the actual use process, since the spray head 4 generates a large backward acting force when spraying high-pressure air flow to remove water droplets and foreign objects on the surface of the electrode cap, the frequent spraying of air flow by the spray head 4 will cause the camera 3 to vibrate accordingly, and the stability of the camera 3 directly affects the detection accuracy of the surface state of the electrode cap;

[0028] To avoid the vibration of the mounting rod 2 caused by the backward movement generated by the blowing action of the spray head 4 for removing water droplets and foreign objects on the surface of the electrode cap, therefore, the camera 3 and the spray head 4 are respectively connected to the mounting rod 2 through the first bracket and the second bracket 51. Among them, the first bracket of the camera 3 is an "S" - shaped structure, and the camera 3 is arranged in the concave part of the first bracket. When the camera 3 is connected to the mounting rod 2 through the first bracket, if vibration occurs, the "S" - shaped structure of the first bracket can filter out a part of the vibration. On the other hand, the spray head 4 is also connected to the mounting rod 2 through the second bracket 51, and a buffer assembly is provided on the second bracket 51. The reason for the vibration generated by the spray head 4 after jetting air is that the spray head 4 will generate a recoil force, that is, the spray head 4 has a tendency to move in the opposite direction of the jetting air. During the continuous process of blowing foreign objects on the electrode cap, the repeated blowing actions cause the spray head 4 to move back and forth frequently, which can generate vibration, and this problem can be avoided by setting a buffer assembly between the spray head 4 and the second bracket 51. The bottom of the mounting rod 2 is connected with a leg 1, and the leg 1 is used for connecting to the equipment.

[0029] Further, there are two sets of the camera 3 and the nozzle 4 respectively, and the two cameras 3 are located on the upper and lower sides of the two nozzles 4; since the surface of the electrode cap is generally arc-shaped, the camera 3 in a single direction cannot detect all positions on the surface of the electrode cap. To solve this problem, two cameras 3 are simultaneously arranged on the mounting rod 2, and the two cameras 3 are located at two height positions, and the surface of the electrode cap is detected simultaneously in different directions to improve the detection accuracy. In order to cooperate with the detection of the two cameras 3 at different heights, the two cameras 3 are arranged adjacent to each other on the mounting rod 2, and nozzles 4 are respectively arranged above and below the two cameras 3 for blowing and cleaning the surface of the electrode cap at different angles.

[0030] Specifically, one end of the second bracket 51 is connected to the mounting rod 2, and the other end is connected with a buffer assembly. The buffer assembly includes a telescopic frame 52 which is slidably arranged on the second bracket 51. A through hole is formed in the telescopic frame 52. A spring 54 is arranged between the telescopic frame 52 and the second bracket 51. One end of the spring 54 abuts against the end of the telescopic frame 52, and the other end abuts against the support plate 53 of the second bracket 51. The nozzle 4 moves back and forth in the through hole and pushes the telescopic frame 52 to compress or stretch the spring 54 for buffering and shock absorption.

[0031] After the nozzle 4 is slidably arranged in the through hole, with the forward and backward movement action generated by the backward recoil force when the nozzle 4 jets air, the nozzle 4 will slide in the through hole and squeeze the left and right expansion of the telescopic frame 52, that is, convert the forward and backward vibration of the nozzle 4 into the left and right movement vibration of the telescopic frame 52, and absorb the vibration through the spring 54 between the telescopic frame 52 and the second bracket 51. In the initial state, the nozzle 4 is at the front end position of the through hole. At this time, the telescopic frame 52 is mostly retracted into the second bracket 51 under the pulling force of the spring 54, and a partial area of the through hole is also retracted into the second bracket 51. When the nozzle 4 jets air and moves backward, the nozzle 4 will squeeze the through hole and gradually expand the range where the through hole exposes the second bracket 51, and at the same time squeeze the through hole to make the telescopic frame 52 extend out of the second bracket 51, and keep the left and right positions of the nozzle 4 unchanged while squeezing and pushing the telescopic frame 52 to expand and contract.

[0032] In order to achieve the effect of the nozzle 4 squeezing the through hole so that the telescopic frame 52 produces telescopic effect on the second bracket 51, specifically, the contact surface between the side wall of the nozzle 4 and the side wall of the through hole is an inclined surface that gradually decreases from front to back; the side surface of the nozzle 4 is an inclined surface, and presents a structure with a large front end and a small rear end; before the nozzle 4 sprays, only the part with a smaller diameter at the rear end of the nozzle 4 is sleeved in the through hole, and after the nozzle 4 sprays, the recoil force generated pushes the nozzle 4 to move backward, and the sleeve position of the nozzle 4 in the through hole moves from back to front, and the diameter of the nozzle 4 position sleeved in the through hole gradually increases from small to large, so that the area of ​​the through hole on the telescopic frame 52 that is squeezed and pushed out of the second bracket 51 is larger, and the length of the telescopic frame 52 that extends out of the second bracket 51 is longer. After the nozzle 4 stops spraying, with the elastic force of the spring 54 between the second bracket 51 and the telescopic frame 52, the telescopic frame 52 is gradually pulled back and the nozzle 4 is squeezed out.

[0033] Since the original jetting position of the nozzle 4 moves backward and changes, resulting in the displacement of the jetting point, it is not conducive to the removal of water droplets and foreign matter from the electrode cap. In order to ensure that the jetting point of the nozzle 4 does not change after the position of the nozzle 4 moves, in one embodiment, a telescopic plate 56 is further included. The telescopic plate 56 is transmission-connected to the telescopic frame 52. The telescopic plate 56 extends as the telescopic frame 52 extends and pushes the nozzle 4 to rise, and retracts as the telescopic frame 52 retracts and releases the nozzle 4 to descend.

[0034] Specifically, a first gear 55 and a second gear 57 are transmission-connected between the inner wall of the telescopic frame 52 and the telescopic plate 56; the telescopic plate 56 is at the bottom of the nozzle 4, and the inner lower surface of the telescopic frame 52 is provided with teeth, and the upper surface of the telescopic plate 56 is also provided with teeth, and the first gear 55 and the second gear 57 are meshed in the middle position of the two. When the telescopic frame 52 moves outward, the telescopic plate 56 also moves outward through the transmission of the two gears, and is squeezed on the bottom of the nozzle 4 and lifts up the nozzle 4, so that the jet position of the nozzle 4 is lifted up by the telescopic plate 56 and sprayed toward the origin after being translated backward, thereby avoiding the deviation of the jet position of the nozzle 4.

[0035] The contact surface between the telescopic plate 56 and the nozzle 4 is an inclined surface; since the telescopic plate 56 is an inclined surface, and the inclined surface is from small to large, as the nozzle 4 moves backward, the front end of the nozzle 4 is lifted higher by the telescopic plate 56. In order to prevent the nozzle 4 from detaching from the through hole in the telescopic frame 52 after moving forward and backward during spraying, the front and rear ends of the nozzle 4 need to be respectively provided with limit bars to contact and limit the front and rear ends of the through hole of the telescopic frame 52.

[0036] A method of using a detection structure for detecting the grinding effect of an electrode cap, which is applicable to a detection structure for detecting the grinding effect of an electrode cap in the above-mentioned embodiment. After the surface of the electrode cap is ground by the welding torch, it is moved to a designated position. The nozzle 4 sprays air to blow away the water droplets and foreign matters on the electrode cap. The camera 3 starts to photograph the electrode cap, and the control device judges the surface smoothness of the electrode cap, so as to judge whether the grinding is successful. When the detection result is yes, it enters the next processing step. When the detection result is no, the nozzle 4 sprays air again.

[0037] The above is only a preferred embodiment of the present invention, and it does not impose any form of limitation on the present invention. Although the present invention has been disclosed above with a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to equivalent embodiments by using the above-disclosed technical content within the scope of the technical solution of the present invention. However, as long as it does not depart from the technical solution content of the present invention, any brief modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A detection structure for detecting the grinding effect of an electrode cap, characterized in that: It includes an installation rod, a camera and a nozzle. A first bracket and a second bracket are connected to the installation rod. The camera is connected to the first bracket. A buffer assembly is arranged on the second bracket. The nozzle is movably connected to the buffer assembly. A control device is arranged on the installation rod. The camera and the nozzle are respectively electrically connected to the control device. The control device instructs the nozzle to spray high-pressure air flow according to the data obtained by the camera.

2. The detection structure for detecting the grinding effect of the electrode cap according to claim 1, wherein: There are two groups of the camera and the nozzle respectively. The two cameras are located on the upper and lower sides of the two nozzles.

3. The detection structure for detecting the grinding effect of the electrode cap according to claim 1, wherein: One end of the second bracket is connected to the installation rod, and the other end is connected with the buffer assembly. The buffer assembly includes a telescopic frame. The telescopic frame is slidably arranged on the second bracket. Through holes are formed in the telescopic frame. A spring is arranged between the telescopic frame and the second bracket. The nozzle moves back and forth in the through hole and pushes the telescopic frame to compress or stretch the spring for buffering and shock absorption.

4. The detection structure for detecting the grinding effect of the electrode cap according to claim 3, characterized in that: The contact surface between the side wall of the nozzle and the side wall of the through hole is an inclined surface that gradually narrows from front to back.

5. The detection structure for detecting the grinding effect of the electrode cap according to claim 3, characterized in that: It further includes a telescopic plate. The telescopic plate is in transmission connection with the telescopic frame. The telescopic plate extends out as the telescopic frame extends out and pushes the nozzle to rise, and retracts as the telescopic frame retracts and releases the nozzle to descend.

6. The detection structure for detecting the grinding effect of the electrode cap according to claim 5, characterized in that: A first gear and a second gear are in transmission connection between the inner wall of the telescopic frame and the telescopic plate.

7. The detection structure for detecting the grinding effect of the electrode cap according to claim 5, characterized in that: The contact surface between the telescopic plate and the nozzle is an inclined surface.

8. A method for using a detection structure for detecting the grinding effect of an electrode cap, which is applicable to a detection structure for detecting the grinding effect of an electrode cap as described in any one of claims 1-7, characterized in that: After the surface of the electrode cap is ground by the welding torch, it moves to the designated position. The nozzle sprays air to blow away the water droplets and foreign matters on the electrode cap. The camera starts to photograph the electrode cap, and judges the surface smoothness of the electrode cap through the control device, so as to judge whether the grinding is successful. When the detection result is yes, it enters the next processing step. When the detection result is no, the nozzle sprays air again.

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