Detection device for electrode cap of electrode holder and connecting piece of electrode cap

Abstract

The utility model provides a detection device for an electrode holder electrode cap and a connecting piece thereof, and belongs to the technical field of electrode holder detection. Comprising a main supporting frame, an electrode cap detection module and a welding machine connecting piece detection module, the electrode cap detection module is fixed to the upper end of the main supporting frame, and the welding machine connecting piece detection module is fixed to the outer surface of the electrode cap detection module; the electrode cap detection module comprises a shell, cameras, a light source, a double-sided reflective mirror and an electrode cap guide sleeve, the top end of the shell is fixed to the main supporting frame, the two cameras are arranged at the upper end and the lower end of the shell respectively, the light source is arranged at the lens end of each camera, and the electrode cap guide sleeve used for penetrating through an electrode cap is arranged in the middle of the shell. A double-sided reflective mirror is obliquely arranged in the shell, and a light source is reflected to penetrate through the electrode cap guide sleeve. The device provided by the utility model is simple in structure, low in cost requirement, high in detection efficiency and accurate in detection, and replaces manual detection.

Description

Technical Field

[0001] The invention relates to a detection device for a welding clamp electrode cap and a connecting piece thereof, belonging to the technical field of welding clamp detection. Background Art

[0002] With the continuous development of industrial technology, the degree of welding automation is getting higher and higher. Among various welding methods, spot welding is one of the most important welding methods, which is widely used in industrial fields such as automobiles, tractors, aerospace, etc. During spot welding, pressure is first applied to make the workpieces in close contact, and then the current is turned on. Under the action of resistance heat, the contact part of the workpiece melts and forms a weld after cooling.

[0003] After welding the workpiece multiple times, the electrode cap will oxidize its surface due to frequent high current and high temperature, resulting in an oxide layer. If the contact area is too large or too small, it will cause unstable current and unqualified welds, resulting in reduced welding quality or welding failure. The electrode cap wear defects are classified by diameter: 1. No wear, 2. Slight wear, 3. Moderate wear, and 4. Severe wear.

[0004] In the spot welding process, electrode centering is an important indicator, which is directly related to the appearance, strength and service life of the electrode cap of the weld. In order to meet the welding strength requirements, the upper and lower electrodes of the welding clamp need to maintain good concentricity at all times. Therefore, it is necessary to detect the centering degree of the two electrode caps carried by the movable arm and the static arm of the welding clamp and classify them. Classification standard center deviation distance: center deviation is less than 1 mm; center deviation is greater than 1 mm and less than 3 mm; center deviation is greater than 5 mm.

[0005] Due to the influence of defects, frequent grinding is required. The quality of grinding will directly affect the quality of subsequent workpiece welding, and also affect the service life of the electrode cap. The defects of the electrode cap end face after grinding are: 1 normal grinding, 2 no grinding, 3 concave, 4 rough surface, 5 non-round, 6 center convex, 7 chip residue.

[0006] During the electric welding process, the copper connectors of the welding clamps often break, fall apart, and other abnormal conditions, thus affecting welding.

[0007] Traditional inspections of electrode cap defects, centering and grinding lack effective inspections, and most inspections are done by visual inspection or ruler comparison. In the process of welding, the copper connector of the welding clamp is inspected for abnormalities. In actual use, the outer surface of the welding clamp connector is covered with a structural shell, and the abnormal detection of the connector needs to be performed through the outer shell of the welding clamp. It is difficult to detect abnormalities manually during welding, and the detection is not timely.

[0008] Manual inspection cannot comprehensively detect defects, indirectly leading to an increase in production costs. This method is slow and inefficient. Moreover, some defects can only be seen under certain reflective conditions. Due to individual visual differences, visual inspection with the naked eye will affect the detection effect. When there are operation errors, it is easy to cause damage to the detection device. In addition, in the existing technology, the defect type cannot be obtained more precisely, which cannot provide positive reference significance for production. And the degree of intelligence in the existing technology is low, and the production line cannot achieve full automation. The manual method requires the inspectors to have certain professional skills. This leads to subjectivity in manual inspection and the lack of reliability of the inspection results. Prolonged use of the eyes is likely to cause eye fatigue, resulting in poor detection effects. The inspection effect is not ideal. Summary of the Invention

[0009] The object of the present invention is to provide a detection device for a welding electrode cap and its connecting piece, which can comprehensively detect the defects of the electrode cap and can greatly improve the detection rate.

[0010] To achieve the above object, the present invention is realized through the following technical solutions:

[0011] A main support frame, an electrode cap detection module, and a welding machine connecting piece detection module. The electrode cap detection module is fixed to the upper end of the main support frame, and the welding machine connecting piece detection module is fixed to the outer surface of the electrode cap detection module.

[0012] The electrode cap detection module includes a housing, a camera, a light source, a double-sided reflector, and an electrode cap guide sleeve. The top of the housing is fixed to the main support frame. There are two cameras, which are respectively arranged at the upper and lower ends of the housing. The light source is arranged at the lens end of the camera. An electrode cap guide sleeve for passing through the electrode cap is arranged in the middle of the housing. A double-sided reflector is obliquely arranged inside the housing to reflect the light source through the electrode cap guide sleeve.

[0013] Preferably, the main support frame includes a fixed seat, a fixed pillar, a pillar fixing clamp, a connecting pillar, and a connecting fixed seat. The fixed pillar is vertically fixed to the fixed seat. The connecting pillar is horizontally fixed to the fixed pillar through the pillar fixing clamp. The other end of the connecting pillar is connected to the housing of the electrode cap detection module through the connecting fixed seat.

[0014] Preferably, a dust-proof cover is arranged on the side of the electrode cap guide sleeve of the electrode cap detection module.

[0015] Preferably, there are two electrode caps, one is fixed to one end of the welding machine, and the other is connected to the welding machine through a telescopic arm.

[0016] Preferably, a welding machine connecting piece is further arranged at the end of the welding machine connecting the electrode cap. The welding machine connecting piece detection module is arranged on the surface of the housing and is directly opposite to the welding machine connecting piece of the welding machine.

[0017] Preferably, the welding machine connector detection module includes a fixed seat, a fixed shaft, and an infrared camera. The infrared camera is fixed to the fixed shaft, and the fixed shaft is fixed to the surface of the housing through the fixed seat.

[0018] The advantages of the present invention are as follows: The utility model has a simple structure, low cost requirements, high detection efficiency, and accurate detection, and uses a device to replace manual detection. It can realize the detection of electrode cap defects, the detection and classification of the centering degree of the electrode cap, the detection of grinding effects, and the real-time detection of whether there are abnormalities in the welding machine connectors during the welding process to ensure the welding quality. It solves the deficiencies of existing detections, can better meet the shooting requirements and present the best effects; can better highlight defects; can comprehensively detect, and can greatly improve the detection rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings are used to provide a further understanding of the present invention, and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention, but do not constitute a limitation to the present invention.

[0020] Figure 1 It is a schematic structural diagram of the overall device.

[0021] Figure 2 It is a schematic structural diagram of the electrode cap detection module.

[0022] Figure 3 It is a schematic structural diagram of the welding machine connector detection module.

[0023] Figure 4 It is a schematic structural diagram of the main support frame.

[0024] Figure 5 It is a top view schematic diagram of the overall device.

[0025] In the figure: 1. Main support frame, 11. Fixed seat, 12. Fixed pillar, 13. Pillar fixing clip, 14. Connecting pillar, 15. Connecting fixed seat, 2. Electrode cap detection module, 21. Housing, 22. Camera, 23. Light source, 24. Double-sided reflector, 25. Electrode cap guide sleeve, 26. Dust cover, 3. Welding machine connector detection module, 31. Fixed seat, 32. Fixed shaft, 33. Infrared camera, 4. Welding machine, 5. Welding machine connector, 6. Electrode cap, 7. Telescopic arm. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0027] A detection device for a welding clamp electrode cap and its connecting piece, comprising: a main support frame 1, an electrode cap detection module 2 and a welding machine connecting piece detection module 3. The electrode cap detection module 2 is fixed to the upper end of the main support frame 1, and the welding machine connecting piece detection module 3 is fixed to the outer surface of the electrode cap detection module 2. The electrode cap detection module 2 includes a housing 21, a camera 22, a light source 23, a double-sided reflector 24 and an electrode cap guide sleeve 25. The top of the housing 21 is fixed to the main support frame 1. There are two cameras 22, which are respectively arranged at the upper and lower ends of the housing 21. The light source 23 is arranged at the lens end of the camera 22. An electrode cap guide sleeve 25 for passing through the electrode cap 6 is arranged in the middle of the housing 21. A double-sided reflector 24 is obliquely arranged inside the housing to reflect the light source 23 through the electrode cap guide sleeve 25.

[0028] The main support frame 1 includes a fixed seat 11, a fixed pillar 12, a pillar fixing clamp 13, a connecting pillar 14 and a connecting fixed seat 15. The fixed pillar 12 is vertically fixed to the fixed seat 11. The connecting pillar 14 is horizontally fixed to the fixed pillar 12 through the pillar fixing clamp 13. The other end of the connecting pillar 14 is connected to the housing 21 of the electrode cap detection module 2 through the connecting fixed seat 15.

[0029] A dust-proof cover 26 is arranged on the side of the electrode cap guide sleeve 25 of the electrode cap detection module 2.

[0030] There are two electrode caps 6. One is fixed to one end of the welding machine 4, and the other is connected to the welding machine 4 through a telescopic arm 7.

[0031] A welding machine connecting piece 5 is further arranged at one end of the welding machine 4 connected to the electrode cap 6. The welding machine connecting piece detection module 3 is arranged on the surface of the housing 21 and is directly opposite to the welding machine connecting piece 5 of the welding machine 4.

[0032] The welding machine connecting piece detection module 3 includes a fixed seat 31, a fixed shaft 32 and an infrared camera 33. The infrared camera 33 is fixed to the fixed shaft 32. The fixed shaft 32 is fixed to the surface of the housing 21 through the fixed seat 31.

[0033] The working process is as follows:

[0034] Fix the detection device and align the electrode cap guide sleeve 25 with the electrode cap 6 by adjusting the main support frame 1. The infrared camera 33 of the welding machine connector detection module 3 acquires the thermal image of the welding machine connector 5 area, and combines the temperature information and the image processing algorithm to analyze the abnormality of the connector. If it is qualified, it will display to proceed to the next step. Pass the electrode cap 6 through the electrode cap guide sleeve 25 into the electrode cap detection module 2 by adjusting the telescopic arm 7, and collect the overall image of the end face of the electrode cap 6 through the camera 22 for analysis and processing to identify the position and area range of the front end and wear defects of the electrode cap 6.

[0035] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention 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 perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A detection device for a welding clamp electrode cap and its connecting parts, characterized in that: include: A main support frame (1), an electrode cap detection module (2) and a welding machine connection piece detection module (3), wherein the electrode cap detection module (2) is fixed to the upper end of the main support frame (1), and the welding machine connection piece detection module (3) is fixed to the outer surface of the electrode cap detection module (2); The electrode cap detection module (2) comprises a housing (21), a camera (22), a light source (23), a double-sided reflector (24) and an electrode cap guide sleeve (25); the top end of the housing (21) is fixed to the main support frame (1); there are two cameras (22), which are respectively arranged at the upper and lower ends of the housing (21); the light source (23) is arranged at the lens end of the camera (22); the electrode cap guide sleeve (25) for passing the electrode cap (6) is arranged in the middle of the housing (21); and the double-sided reflector (24) is obliquely arranged inside the housing to reflect the light source (23) through the electrode cap guide sleeve (25).

2. The detection device for the electrode cap of welding clamp and its connecting parts according to claim 1, characterized in that: The main support frame (1) comprises a fixing seat (11), a fixing pillar (12), a pillar fixing clamp (13), a connecting pillar (14) and a connecting fixing seat (15); the fixing pillar (12) is vertically fixed to the fixing seat (11); the connecting pillar (14) is laterally fixed to the fixing pillar (12) via the pillar fixing clamp (13); and the other end of the connecting pillar (14) is connected to a housing (21) of an electrode cap detection module (2) via the connecting fixing seat (15).

3. The detection device for the electrode cap of welding clamp and its connecting parts according to claim 1, characterized in that: A dust cover (26) is provided on the side of the electrode cap guide sleeve (25) of the electrode cap detection module (2).

4. The detection device for the electrode cap of welding clamp and its connecting parts according to claim 1, characterized in that: The electrode caps (6) include two, one of which is fixed to one end of the welding machine (4), and the other is connected to the welding machine (4) via a telescopic arm (7).

5. The detection device for the electrode cap of welding tongs and its connecting parts according to claim 4, characterized in that: A welding machine connector (5) is also provided at one end of the welding machine (4) connected to the electrode cap (6), and the welding machine connector detection module (3) is provided on the surface of the housing (21) and is directly opposite to the welding machine connector (5) of the welding machine (4).

6. The detection device for the electrode cap of welding clamp and its connecting parts according to claim 5, characterized in that: The welding machine connecting piece detection module (3) comprises a fixing seat, a fixing shaft (32) and an infrared camera (33); the infrared camera (33) is fixed to the fixing shaft (32); and the fixing shaft (32) is fixed to the surface of the housing (21) via the fixing seat.

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