Visual detector of electrode cap

Abstract

The utility model provides a visual detector of an electrode cap, and belongs to the technical field of electrode detection. A visual detector of an electrode cap comprises a device main body and two placing discs, and the two placing discs are fixedly connected to the surface of the device main body; the number of the cameras is two, and the two cameras are fixedly connected to the surface of the device main body; and the electrode cap is arranged on one side of one camera, so that the problems that a manual method is still used for detecting the surface quality of the electrode cap, the judgment error of the end face and centering of the electrode cap is relatively large and the production efficiency is low in the traditional manual detection are solved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the electrode detection technical field, concretely relates to a visual detector of electrode cap. BACKGROUND

[0002] The electrode cap detection device is a kind of equipment specially designed to check the state of electrode cap used in welding process, and in industrial applications such as resistance spot welding, electrode cap is the key component for current to pass through workpiece to generate heat to form welding spot, and its state directly affects welding quality and efficiency, with the increase of use frequency, electrode cap will gradually wear, leading to poor contact or poor welding effect, therefore, regular detection and timely replacement of electrode cap are important measures to ensure production quality, in addition, some advanced models also have data recording function, can long-term track the service life and performance change trend of electrode cap, provide support for optimizing production process. In this way, not only production efficiency can be improved, but also the welding quality of product can be ensured.

[0003] In the prior art, the surface quality detection of electrode cap is still using manual method, and the traditional manual detection of electrode cap end face and centering error is large and production efficiency is low. UTILITY MODEL CONTENTS

[0004] The utility model discloses a visual detector of electrode cap, which aims to solve the problem of manual detection of electrode cap surface quality in the prior art, and the large error and low production efficiency of traditional manual detection of electrode cap end face and centering.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0006] A visual detector of electrode cap, comprising:

[0007] Device main part;

[0008] Placing disc, the placing disc is equipped with two, two the placing disc is all fixedly connected on the surface of device main part;

[0009] Camera, the camera is equipped with two, two the camera is all fixedly connected on the surface of device main part;

[0010] Electrode cap, the electrode cap is arranged on the side of one camera.

[0011] As a preferred scheme of the utility model, the surface of the device main part is fixedly connected with a clamping sheet.

[0012] As a preferred scheme of the utility model, the surface of the device main part is fixedly connected with two signal lines.

[0013] As a preferred scheme of the utility model, two said placing disc are respectively provided with two observation holes, and the inner walls of the two observation holes are respectively fixedly connected with protective sheets.

[0014] As a preferred scheme of the utility model, the surface of the device main body is fixedly connected with a signal lamp.

[0015] As a preferred scheme of the utility model, two signal lines and the device main body are all screw-connected.

[0016] Compared with the prior art, the utility model has the beneficial effects that:

[0017] 1、In the scheme, the electrode cap of resistance spot welding has great influence on the quality of butt welding, when the electrode cap is detected, the device main body is fixed in the position convenient for observation through the clamping piece, only the surface of the electrode cap needing detection is aligned with the camera, then the picture shot by the camera is transmitted to the computer, and the electrode cap part image collected based on machine vision and machine learning is pretreated, the electrode cap part in the image is positioned and surface good or bad is judged by adopting the template matching method, so that the damage difficult to be distinguished by naked eye on the surface of the electrode cap is detected.

[0018] 2、In the scheme, the two device main bodies can also be fixed in the same plane in two mutually perpendicular directions, the images of the upper and lower electrodes of resistance spot welding are shot, and the continuous images of the electrodes in the welding process in two directions are obtained. The image is binarized, the edges of the image are corrected by adopting Canny algorithm, the axis of the upper and lower electrodes is fitted by least square method, the spatial displacement of the two electrode cap axes in the welding process and the spatial included angle of the axes are calculated, and the comparison measurement experimental results show that the method can quickly and accurately measure the centering of the electrodes in the resistance spot welding process, the spatial distance measurement precision is 0.2mm, and the spatial included angle measurement precision is less than 0.5°, which provides a basis for the centering judgment and adjustment of the welding tongs. BRIEF DESCRIPTION OF DRAWINGS

[0019] The accompanying drawings are used to provide further understanding of the utility model, and constitute a part of the specification, and are used to explain the utility model together with embodiments of the utility model, and do not constitute the limitation to the utility model. In the drawings:

[0020] Fig. 1 It is the first perspective view of the utility model;

[0021] Fig. 2 It is the second perspective view of the utility model;

[0022] Fig. 3 It is the third perspective view of the utility model.

[0023] In the figure: 1, device main body; 2, clamping piece; 3, signal line; 4, placing disc; 5, electrode cap; 6, camera; 7, protective sheet; 8, signal light. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0025] EMBODIMENT

[0026] Please refer to Figs. 1-3 The utility model provides the following technical scheme:

[0027] A visual detector for electrode cap, comprising:

[0028] Device main body 1;

[0029] Placing disc 4 is equipped with two, two placing discs 4 are all fixedly connected to the surface of device main body 1;

[0030] Camera 6 is equipped with two, two cameras 6 are all fixedly connected to the surface of device main body 1;

[0031] Electrode cap 5 is arranged at the side of one camera 6.

[0032] In the specific embodiment of the utility model, the resistance spot welding electrode cap has a great influence on neutral butt welding quality, when needing to detect electrode cap 5, only the place needing to detect of electrode cap 5 is aligned to camera 6, then the picture shot by camera 6 is transmitted to computer, and the electrode cap part image collected based on machine vision and machine learning is pretreated, the electrode cap part in the image is positioned and surface good or bad is judged using template matching method, so as to detect the damage difficult to be distinguished by naked eye on the surface of electrode cap.

[0033] Specifically, referring to Figs. 1-3 The surface of device main body 1 is fixedly connected with clamping piece 2.

[0034] In the embodiment, the function of clamping piece 2 is to facilitate clamping and convenient observation.

[0035] Specifically, referring to Figs. 1-3 The surface of device main body 1 is fixedly connected with two signal lines 3.

[0036] In the embodiment, the function of signal line 3 is to connect device main body 1 and computer signal.

[0037] Specifically, please refer to Figs. 1-3 Two observation holes are formed in the two placing plates 4, and the inner walls of the two observation holes are fixedly connected with protective sheets 7.

[0038] In this embodiment, the protective sheet 7 is made of glass, which is used to protect the camera 6 from being damaged.

[0039] Specifically, please refer to Figs. 1-3 The surface of the device main body 1 is fixedly connected with a signal lamp 8.

[0040] In this embodiment, the signal lamp 8 is used to determine whether the device main body 1 is normally running when the device main body 1 is working.

[0041] Specifically, please refer to Figs. 1-3 The two signal lines 3 and the device main body 1 are threadedly connected.

[0042] In this embodiment, the thread connection between the signal line 3 and the device main body 1 is convenient for disassembly and storage.

[0043] Working principle and use process of the utility model: the resistance spot welding electrode cap has a great influence on the neutral butt welding quality, when the electrode cap 5 needs to be detected, the device main body 1 is fixed in the position convenient for observation through the clamping piece 2, only the surface of the electrode cap 5 needs to be detected is aligned with the camera 6, then the picture taken by the camera 6 is transmitted to the computer, and the collected electrode cap part image based on machine vision and machine learning is pretreated, the method of template matching is adopted to position the electrode cap part in the image and judge the surface, so as to detect the surface damage of the electrode cap which is difficult to be distinguished by naked eye, thereby solving the problems that the surface quality detection of the electrode cap is still in manual method, the traditional manual detection of the electrode cap end face and the neutral butt judgment error is large and the production efficiency is low.

[0044] Finally, it should be pointed out that: the above only for preferred embodiments of the utility model, and does not limit the utility model, although the utility model is described in detail with reference to the foregoing embodiments, for those skilled in the art, it still can modify the technical scheme recorded in the foregoing embodiments, or make equivalent replacement to part of the technical features. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A visual inspector of electrode caps, characterized by: Include: Device body (1); The placing disc (4) is provided with two, two The placing disc (4) is fixedly connected to the surface of the device body (1); Camera (6), the camera (6) is provided with two, two The camera (6) is fixedly connected to the surface of the device body (1); The electrode cap (5) is arranged on one side of one of the cameras (6).

2. A visual electrode cap detector according to claim 1, characterized in that: The surface of the device body (1) is fixedly connected with the clamping sheet (2).

3. A visual electrode cap detector according to claim 2, wherein: The surface of the device body (1) is fixedly connected with two signal lines (3).

4. A visual electrode cap detector according to claim 3, wherein: Two The placing disc (4) is respectively provided with two observation holes, and the inner walls of two The observation hole are fixedly connected with the protection sheet (7).

5. A visual electrode cap detector according to claim 4, wherein: The surface of the device body (1) is fixedly connected with the signal lamp (8).

6. A visual electrode cap detector according to claim 5, wherein: Two signal lines (3) and the device body (1) are all threadedly connected.

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