Automatic cleaning device of spot welding machine electrode

Abstract

The invention relates to the technical field of electric welding equipment, and discloses an automatic cleaning device for electrodes of a spot welding machine, which comprises a workbench and further comprises two groups of electrode structures which are symmetrically mounted on the workbench and can be mutually close to or far away from each other for adjustment, each electrode structure comprises an electrode stem and an electrode cap, and a welding area is formed between the two electrode caps; the cleaning structure is arranged on the electrode structure and comprises a scrap collecting plate which is arranged below the electrode rod and can be adjusted to be close to or far away from the axis of the electrode rod, a scraper is installed on the inner wall of the scrap collecting plate, and the tangent plane track of the scraper is the same as that of the electrode cap. The cleaning structure and the electrode rod are integrated, and the time delay assembly is arranged, so that cleaning is started only in a non-spot-welding state, in-situ disassembly-free finishing of the electrode cap is achieved, and the effects that the normal welding rhythm is not affected, manual grinding and frequent electrode replacement are thoroughly omitted, and the continuous operation rate of a production line is remarkably improved are achieved.

Description

Technical Field

[0001] This invention relates to the field of electric welding equipment technology, specifically to an automatic cleaning device for spot welding machine electrodes. Background Technology

[0002] Resistance spot welding machines are widely used in automobile body manufacturing, home appliance sheet metal processing, and thin plate structural parts assembly. They apply pressure and pass current to the workpieces to be welded by a pair of upper and lower electrodes, generating resistance heat at the contact interface to form a weld point. During spot welding, the electrode caps are usually made of copper and its alloys. The shape of their end faces, contact area, and surface cleanliness directly affect the weld point current density, weld nugget diameter, and weld point stability, making them one of the key components to ensure welding quality.

[0003] During long-term repeated spot welding, the electrode cap end face is affected by a variety of factors: on the one hand, the workpiece material is prone to adhesion and alloying with the electrode material under high temperature and high pressure, resulting in the formation of an adhesion layer and spattered metal on the electrode end face; on the other hand, the electrode cap undergoes plastic deformation and wear during repeated extrusion and electric heating, and the end face gradually expands from the original design shape to a "mushroom head" shape, with increased contact area and eccentric shape.

[0004] The above changes can lead to a decrease in welding current density, a reduction or instability in the diameter of the weld joint, and even defects such as incomplete welding and increased spatter. Therefore, it is necessary to periodically clean and repair the electrode cap.

[0005] Currently, the existing electrode cap cleaning methods mainly rely on manual maintenance. Operators use tools such as files and grinding wheels to grind the electrode end face or replace the electrode cap during machine downtime. This makes it difficult to uniformly control the amount of trimming, which can easily lead to over-grinding or under-grinding, resulting in reduced electrode life or fluctuations in solder joint quality. At the same time, it requires frequent machine downtime and manual intervention, which is labor-intensive and difficult to adapt to automated production lines with high cycle times. Summary of the Invention

[0006] The purpose of this invention is to provide an automatic cleaning device for the electrodes of a spot welding machine, so as to solve at least one technical problem existing in the prior art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: an automatic cleaning device for spot welding machine electrodes, comprising a worktable, and further comprising:

[0008] Two sets of electrode structures are symmetrically mounted on the worktable and can be adjusted to be close to or far apart from each other. Each electrode structure includes an electrode rod and an electrode cap, and a welding area is formed between the two electrode caps.

[0009] A cleaning structure is provided on the electrode structure, and the cleaning structure includes a chip collection plate located below the electrode rod and adjustable relative to the axis of the electrode rod, wherein a scraper is installed on the inner wall of the chip collection plate, and the scraper has the same tangential trajectory as the electrode cap.

[0010] The delay component allows for axial free travel relative to the cleaning structure within the normal welding stroke range of the electrode rod performing the spot welding process, and controls the chip collection plate to move closer to the electrode rod after the normal welding stroke is exceeded.

[0011] A driving element, which is used to drive the electrode rod to rotate axially.

[0012] Optionally, the electrode structure includes an outer fixing seat fixed to the top of the worktable and an inner fixing seat slidably mounted on the top of the worktable. Both the outer fixing seat and the inner fixing seat have through holes. The electrode rod passes through the two through holes. The starting end of the electrode rod is connected to a drive system mounted on the top of the worktable. The drive system drives the electrode rod to move axially, and the two are connected in a limited rotational connection.

[0013] Optionally, the cleaning structure further includes a mounting box installed on the outer wall of the inner fixed seat. A fixed frame is horizontally slidably installed inside the mounting box. An adjusting plate is vertically slidably installed on the inner wall of the fixed frame, and the chip collection plate is fixed on the top of the adjusting plate. A slider is installed at the bottom of the mounting box. A connecting rod is rotatably connected between the slider and the adjusting plate. A limiting rod is installed on the outer wall of the outer fixed seat. One end of the limiting rod passes through the inner fixed seat and the mounting box and is fixedly connected to the outer wall of the fixed frame. Both the inner fixed seat and the outer wall of the mounting box have holes through which the limiting rod can pass.

[0014] Optionally, the delay assembly includes a sleeve rotatably mounted on the outer wall of the electrode rod. The sleeve passes through a through hole in the outer wall of the inner fixing seat and is slidably connected to the inner wall of the through hole via a flat key. The sleeve ends on both sides of the inner fixing seat are formed with ring buckles.

[0015] Optionally, an airbag fitted onto the outer wall of the electrode rod is installed between the ring buckle at the end of the sleeve and the outer fixing seat. The outer wall of the airbag has an air outlet that can only release air in one direction, and the outer wall of the airbag is also connected to a one-way air tube. The free end of the one-way air tube passes through the limiting rod and communicates with the sealed space below the adjusting plate. A one-way valve is installed in the one-way air tube. A first sliding groove is opened at the bottom of the fixing frame, and a second sliding groove is opened at the bottom of the mounting box. The slider is slidably installed in the first and second sliding grooves. An elastic pin for locking the slider is installed on the inner wall of the first sliding groove. A spring is also installed between the slider and the inner wall of the second sliding groove. A suction channel is opened inside the connecting rod, and a collection groove extending into the chip collection plate is opened inside the adjusting plate. When the connecting rod rotates beyond a preset angle, the suction channel communicates with the collection groove.

[0016] Optionally, a pressure-sensitive switch is also installed on the inner wall of the first chute, and the pressure-sensitive switch is connected to the drive system via an electrical signal.

[0017] Optionally, a baffle is also fixed to the inner bottom of the fixed frame, and the outlet direction of the suction channel faces the storage area separated by the baffle.

[0018] Optionally, the outer wall of the mounting box is fixed with an adjusting sleeve, the outer wall of the inner fixing seat is provided with a vertical groove for vertical sliding adjustment of the adjusting sleeve, and the outer wall of the outer fixing seat is also provided with a vertical groove for synchronous adjustment of the limiting rod.

[0019] Optionally, during the travel of the mounting box, the edge of the second groove is always dynamically sealed to the bottom of the fixed frame.

[0020] Optionally, the driving component includes a gear rotatably mounted on the outer wall of the inner fixing seat, the electrode rod passing through the center of the gear and slidably connected to the gear's through-hole via a flat key, and a driving part mounted on the top of the inner fixing seat, the driving part being used to drive the gear to rotate.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0022] I. This invention integrates the cleaning structure with the electrode rod and sets a delay component so that cleaning is only started in the non-spot welding state, realizing in-situ non-disassembly repair of the electrode cap. This achieves the effect of not affecting the normal welding cycle, completely eliminating manual grinding and frequent electrode replacement, and significantly improving the continuous operation rate of the production line.

[0023] Second, this invention utilizes an airbag to continuously pump air during the welding process, accumulating negative pressure below the adjustment plate. The magnitude of the negative pressure serves as a quantitative signal for the amount of electrode used, triggering a pressure-sensitive switch to automatically enter the cleaning cycle. This achieves timed and quantitative control of the cleaning timing, preventing excessive deformation of the electrode cap that is difficult to repair, and extending the overall lifespan of the electrode.

[0024] Third, at the moment the scraper contacts the electrode cap, the present invention releases negative pressure to cause the adjusting plate to drive the scraper to advance slowly, and simultaneously connects the suction channel and the collection trough to suck the grinding waste into the sealed storage area in real time. This achieves the effect of preventing the scraper from breaking and eliminating the secondary contamination of the workpiece by splashed metal, realizing efficient, clean and shape-controllable electrode cap trimming, and ensuring a high degree of consistency in the quality of the weld points. Attached Figure Description

[0025] Figure 1 This is an axonal perspective view of the present invention;

[0026] Figure 2 This is the front view of the present invention;

[0027] Figure 3 These are front sectional views and partial views of the present invention;

[0028] Figure 4 For the present invention Figure 3 A sectional perspective view and a magnified partial view;

[0029] Figure 5 For the present invention Figure 3 A magnified view of a specific area within the perspective;

[0030] Figure 6 This is a top enlarged perspective view of the chip collecting plate and scraper of the present invention;

[0031] Figure 7 This is a bottom-view enlarged perspective view of the chip collection plate of the present invention;

[0032] Figure 8 This is an enlarged sectional perspective view of the mounting box and fixing frame of the present invention;

[0033] Figure 9 This is an exploded perspective view of the mounting box, fixing frame, and chip collection plate of the present invention.

[0034] In the diagram: 1. Workbench; 2. External fixed seat; 3. Internal fixed seat; 4. Electrode rod; 5. Electrode cap; 6. Drive system; 7. Mounting box; 8. Fixing frame; 9. Sleeve; 10. Airbag; 11. Gear; 12. Drive unit; 13. Chip collection plate; 14. Scraper; 15. Adjusting plate; 16. First slide groove; 17. Second slide groove; 18. Slider; 19. Spring; 20. Pressure-sensitive switch; 21. Connecting rod; 22. Suction channel; 23. Collection trough; 24. Stop bar; 25. Adjusting sleeve; 26. Limiting rod; 27. One-way air pipe. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] Please see Figures 1 to 9 The present invention provides a technical solution: an automatic cleaning device for spot welding machine electrodes, comprising a workbench 1, and further comprising:

[0037] Two sets of electrode structures are symmetrically mounted on the workbench 1 and can be adjusted to be close to or far from each other. The electrode structure includes an electrode rod 4 and an electrode cap 5, and a welding area is formed between the two electrode caps 5.

[0038] A cleaning structure is provided on the electrode structure, and the cleaning structure includes a chip collection plate 13 located below the electrode rod 4 and adjustable to move closer to or further away from the axis of the electrode rod 4. A scraper 14 is installed on the inner wall of the chip collection plate 13, and the scraper 14 has the same tangential trajectory as the electrode cap 5.

[0039] The delay component allows for an axial free stroke relative to the cleaning structure within the normal welding stroke range of the electrode rod 4 during the spot welding process, and controls the chip collection plate 13 to move closer to the electrode rod 4 after the normal welding stroke is exceeded.

[0040] The driving component is used to drive the electrode rod 4 to rotate axially.

[0041] When in use, the automatic cleaning device has two states: one is when the electrode rod 4 is within the normal welding stroke of the spot welding process (i.e., spot welding state), and the other is when the electrode rod 4 exceeds the normal welding stroke (i.e., non-spot welding state). The cleaning structure only works in the second non-spot welding state to avoid affecting the electrode rod 4 and electrode cap 5 in the spot welding state.

[0042] Therefore, the designed delay component allows the electrode rod 4 to move normally in the spot welding state without triggering the cleaning structure to start, thus ensuring the normal spot welding process. That is, the two electrode rods 4 are adjusted to move closer or further apart (along the axial direction) by the external structure, and the two electrode caps 5 contact the workpiece to be welded, completing the spot welding process in the welding area.

[0043] After spot welding, the two electrode rods 4 will move away from each other under the control of the external structure, and the travel distance of the electrode rods 4 will exceed the normal travel distance of the spot welding process. Therefore, the cleaning structure will be activated to clean the electrode cap 5 at this time. Specifically, when the electrode rod 4 moves and drives the electrode cap 5 to the position of the chip collection plate 13, the delay component controls the chip collection plate 13 to move closer to the electrode rod 4, and makes the scraper 14 contact the outer edge of the electrode cap 5. At the same time, the electrode rod 4 also rotates axially under the action of the drive component. Since the shape of the scraper 14 is the same as the cross-sectional shape of the electrode cap 5, such as Figure 5 and Figure 6 As shown, the scraper 14 can grind and scrape off the spattered metal adhering to the outer wall of the electrode cap 5, and can also grind or even trim the protrusions after plastic deformation at the end of the electrode cap 5, so as to achieve the effect of cleaning and repairing the outer wall of the electrode cap 5.

[0044] In this way, by arranging scrapers 14 (which can also be shaped scrapers / grinding blades) on the inner wall of the chip collection plate 13, and driving the electrode rod 4 and electrode cap 5 to rotate around their own axis during cleaning, the electrode cap 5 is scraped circumferentially within the fixed blade, so that the outer circle of the end face is trimmed according to the set contour. The contact area and shape are controllable and highly repeatable. Compared with manual grinding with a file, the trimming amount and end face shape no longer depend on the worker's experience. Furthermore, the cleaning structure is integrated with the electrode rod 4, so there is no need to disassemble the electrode cap 5 or move the welding clamp to an external trimming machine. The trimming can be completed by inserting the cleaning action in place, reducing the number of times manual grinding and frequent electrode replacement are required.

[0045] In one preferred embodiment, a method for mounting the motor structure is provided;

[0046] The electrode structure includes an outer fixing seat 2 fixed on the top of the worktable 1 and an inner fixing seat 3 slidably mounted on the top of the worktable 1. Both the outer fixing seat 2 and the inner fixing seat 3 have through holes. The electrode rod 4 passes through the two through holes. The starting end of the electrode rod 4 is connected to the drive system 6 mounted on the top of the worktable 1. The drive system 6 drives the electrode rod 4 to move axially, and the two are connected by a limiting rotation.

[0047] For details, please refer to [link / reference]. Figure 1 and Figure 2During spot welding, the electrode rod 4 is driven to move axially by the drive system 6 to complete the welding process. The drive system 6 can be a cylinder, hydraulic cylinder or electric telescopic rod, depending on the situation. The active rod of the drive system 6 and the electrode rod 4 are preferably coaxially rotatably connected. This allows them to move and adjust synchronously along the axial direction, and also provides a basis for the rotation of the electrode rod 4 during the subsequent cleaning process. The specific structure of the drive system 6 is not shown in the figure.

[0048] In one preferred embodiment, an implementation method for the cleanup structure is provided;

[0049] The cleaning structure also includes a mounting box 7 installed on the outer wall of the inner fixed seat 3. A fixed frame 8 is horizontally slidably installed inside the mounting box 7. An adjusting plate 15 is vertically slidably installed on the inner wall of the fixed frame 8, and a chip collection plate 13 is fixed on the top of the adjusting plate 15. A slider 18 is installed at the bottom of the inner wall of the mounting box 7. A connecting rod 21 is rotatably connected between the slider 18 and the adjusting plate 15. A limiting rod 26 is installed on the outer wall of the outer fixed seat 2. One end of the limiting rod 26 passes through the inner fixed seat 3 and the mounting box 7 and is fixedly connected to the outer wall of the fixed frame 8. The outer walls of the inner fixed seat 3 and the mounting box 7 are both provided with holes through which the limiting rod 26 can pass.

[0050] The delay component includes a sleeve 9 rotatably mounted on the outer wall of the electrode rod 4. The sleeve 9 passes through the through hole on the outer wall of the inner fixing seat 3 and is slidably connected to the inner wall of the through hole by a flat key. The ends of the sleeve 9 located on both sides of the inner fixing seat 3 are formed with ring buckles.

[0051] For details, please refer to [link / reference]. Figures 3 to 5 Firstly, during the normal spot welding process, the axial reciprocating movement of the electrode rod 4 and the movement of the sleeve 9 do not cause the ring to contact the inner fixed seat 3. Therefore, the inner fixed seat 3 is in a stopped state, and there is no relative displacement between the mounting box 7 and the fixed frame 8. At this time, the chip collection plate 13 and the scraper 14 are in a state away from the electrode rod 4.

[0052] Secondly, when the electrode rods 4 finish spot welding and move away from each other, the ring on the edge of the sleeve 9 contacts the inner fixing seat 3 and moves it, thereby moving the mounting box 7. The fixing frame 8 remains stationary under the abutment of the limiting rod 26. This creates a relative displacement between the mounting box 7 and the fixing frame 8. Figure 5 For example, when the mounting box 7 moves to the right along with the inner fixed seat 3, the slider 18 at its bottom will drive the adjusting plate 15 to move upward through the connecting rod 21, thereby causing the chip collecting plate 13 and the scraper 14 to move upward and approach the electrode rod 4 and the electrode cap 5, until the scraper 14 contacts the electrode cap 5. At the same time, the electrode rod 4 rotates axially under the action of the above-mentioned driving component, completing the grinding and dressing process of the electrode cap 5.

[0053] In this way, the delay effect of the sleeve 9 can make the cleaning process and the welding process staggered and independent of each other, which can further improve the cleaning efficiency of the electrode cap 5.

[0054] In a further preferred embodiment, an implementation method is provided that can collect and clean up the waste debris that has been removed;

[0055] An airbag 10, fitted onto the outer wall of the electrode rod 4, is installed between the ring at the end of the sleeve 9 and the outer fixing seat 2. The outer wall of the airbag 10 has an air outlet that allows only one-way airflow, and a one-way air tube 27 is connected to the outer wall of the airbag 10. The free end of the one-way air tube 27 passes through the limiting rod 26 and communicates with the sealed space below the adjusting plate 15. A one-way valve is installed inside the one-way air tube 27. A first sliding groove 16 is provided at the bottom of the fixing frame 8, and a second sliding groove 16 is provided at the bottom of the inner side of the mounting box 7. The slider 18 is slidably installed in the first slide groove 16 and the second slide groove 17. The inner wall of the first slide groove 16 is equipped with an elastic pin for locking the slider 18. A spring 19 is also installed between the slider 18 and the inner wall of the second slide groove 17. The connecting rod 21 has a suction channel 22 inside. The adjusting plate 15 has a collection groove 23 extending into the chip collection plate 13 inside. When the connecting rod 21 rotates beyond a preset angle, the suction channel 22 communicates with the collection groove 23.

[0056] The inner wall of the first slide groove 16 is also equipped with a pressure-sensitive switch 20, and the pressure-sensitive switch 20 is electrically connected to the drive system 6 through the control system.

[0057] For details, please refer to [link / reference]. Figure 3-5 Since the electrode cap 5 is being trimmed, the sputtered metal adhering to it and the waste generated during trimming will scatter, it is necessary to collect the waste. Therefore, in this embodiment, the waste is mainly collected, and the specific method is as follows:

[0058] As we know from the previous content, electrode rod 4 will continuously reciprocate axially within the allowable range of motion during normal spot welding. (See...) Figure 5 Therefore, by adding the airbag 10, the electrode rod 4 can continuously squeeze and stretch the airbag 10 through the sleeve 9 when it moves, thereby continuously sucking out the air in the space below the adjustment plate 15 through the one-way air tube 27, so that the air inside is negative pressure, which provides suction for adsorbing waste in the subsequent trimming process.

[0059] Furthermore, as the negative pressure increases, the downward suction force on the adjusting plate 15 gradually increases. When the downward force exceeds the locking effect of the elastic pin in the first slide groove 16 on the slider 18, the slider 18 will slide away from the elastic pin and contact the pressure-sensitive switch 20. Then, the pressure-sensitive switch 20 controls the drive system 6 to retract the electrode rod 4 through the control system, that is, to switch from the spot welding process to the non-spot welding state. The purpose of this method is to monitor the number of times the electrode rod 4 is used in real time by changing the negative pressure, so as to achieve the purpose of cleaning the electrode rod 4 after timed or quantitative use. At the same time, it can also control the cleaning time and avoid excessive plastic deformation due to excessive metal adhering to the surface of the electrode cap 5, which would make it difficult to repair.

[0060] Then, as the electrode rod 4 moves, the ring of the sleeve 9 drives the inner fixing seat 3 to move, which in turn drives the mounting box 7 to move. At this time, the second slide groove 17 inside will use the spring 19 to press the slider 18 to move. Due to the negative pressure below the adjusting plate 15, the spring 19 will be compressed to the extreme first, and then drive the slider 18 to move. This can give the slider 18 a buffer or delay effect. That is, after the electrode cap 5 moves above the scraper 14 and stops, the adjusting plate 15 will drive the chip collection plate 13 and the scraper 14 to move upward. This can avoid the problem of interference in the stroke of the scraper 14 and the electrode rod 4.

[0061] Simultaneously, as the slider 18 moves, the connecting rod 21 rotates while pushing the adjusting plate 15 upward. When the connecting rod 21 exceeds the rotation angle, its internal suction channel 22 will connect with the collection trough 23, that is, the negative pressure space below is connected with the collection trough 23. In this way, during the trimming process, the waste chips that fall onto the chip collection plate 13 will be sucked into the space below through the collection trough 23 and the suction channel 22, thus achieving the effect of collecting waste chips.

[0062] In this way, the formation of the negative pressure space can not only achieve the timed maintenance of the electrode cap 5 through the accumulation speed, but also achieve the collection of waste during the maintenance process.

[0063] Furthermore, it is worth mentioning that, due to the suction effect on the adjusting plate 15 within the negative pressure space, after the suction channel 22 is connected to the collection trough 23, as the negative pressure is gradually released, the downward suction force of the adjusting plate 15 will gradually decrease. Therefore, the elastic force of the spring 19 will also be released slowly, meaning that the adjusting plate 15 will have a slow upward process. This allows the scraper 14 to gradually move towards the electrode cap 5, avoiding excessive initial movement that could cause the scraper 14 to come into contact with splashed metal or deformed edges too quickly, resulting in chipping or edge breakage. This not only improves the cleaning and trimming effect but also protects the scraper 14.

[0064] Moreover, this means that the suction channel 22 and the collection trough 23 will be partially connected first, and then gradually fully connected as the air pressure is released. This allows the suction airflow to be generated first. Furthermore, due to the close fit between the chip collection plate 13 and the electrode cap 5, external airflow can be drawn in through the gap between the chip collection plate 13 and the electrode cap 5. This airflow can further reduce the escape of waste chips and make them easier to collect.

[0065] In one preferred embodiment, a baffle 24 is also fixed to the inner bottom of the fixed frame 8, and the outlet direction of the suction channel 22 faces the storage area separated by the baffle 24.

[0066] For details, please refer to [link / reference]. Figure 4 In order to prevent the sucked-in waste from entering the first chute 16 and the second chute 17, the outlet direction of the suction channel 22 is designed and the storage area is separated in the negative pressure space by the baffle 24, so as to achieve the purpose of centralized collection of waste.

[0067] In one preferred embodiment, the outer wall of the mounting box 7 is fixed with an adjusting sleeve 25, the outer wall of the inner fixing seat 3 is provided with a vertical groove for the adjusting sleeve 25 to slide vertically, and the outer wall of the outer fixing seat 2 is also provided with a vertical groove for the limiting rod 26 to adjust synchronously.

[0068] For details, please refer to [link / reference]. Figure 5 The purpose of designing the vertical groove is to allow the entire cleaning structure to be moved downwards and adjusted during the spot welding process, providing more space for the welding area, and then reset during the cleaning process.

[0069] Furthermore, the design of the adjusting sleeve 25 can not only limit the movement between the inner fixed seat 3 and the mounting box 7, but also allow it to move relative to the limiting rod 26.

[0070] In one preferred embodiment, during the travel of the mounting box 7, the edge of the second slide groove 17 is always dynamically sealed to the bottom of the fixing frame 8.

[0071] By designing the length of the second slide groove 17, the negative pressure space is prevented from being directly connected to the outside through the second slide groove 17, thus ensuring the formation of negative pressure within the negative pressure space.

[0072] In one preferred embodiment, the driving component includes a gear 11 rotatably mounted on the outer wall of the inner fixing seat 3, an electrode rod 4 passing through the center of the gear 11 and slidably connected to the through point of the gear 11 via a flat key, and a driving part 12 is mounted on the top of the inner fixing seat 3, and the driving part 12 is used to drive the gear 11 to rotate.

[0073] See driver components Figure 1 and Figure 5The electrode rod 4 can be rotated by means of gear transmission.

[0074] The standard parts used in this embodiment can be purchased directly from the market, while the non-standard structural parts described in the specification and drawings can be processed directly based on existing technical knowledge without any doubt. At the same time, the connection methods of each component adopt mature conventional methods in the existing technology, and the machinery, parts and equipment all adopt conventional models in the existing technology, so they will not be described in detail here.

[0075] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automatic cleaning device for spot welding machine electrodes, comprising a workbench (1), characterized in that, Also includes: Two sets of electrode structures are symmetrically mounted on the workbench (1) and can be adjusted to be close to or far from each other. The electrode structures include electrode rods (4) and electrode caps (5), and a welding area is formed between the two electrode caps (5). A cleaning structure is provided on the electrode structure, and the cleaning structure includes a chip collection plate (13) located below the electrode rod (4) and adjustable relative to the axis of the electrode rod (4). A scraper (14) is installed on the inner wall of the chip collection plate (13), and the scraper (14) has the same tangential trajectory as the electrode cap (5). The delay component allows for an axial free stroke relative to the cleaning structure within the normal welding stroke range of the electrode rod (4) performing the spot welding process, and controls the chip collection plate (13) to move closer to the electrode rod (4) after the normal welding stroke is exceeded. A driving element, which is used to drive the electrode rod (4) to rotate axially.

2. The automatic cleaning device for spot welding machine electrodes according to claim 1, characterized in that: The electrode structure includes an outer fixing seat (2) fixed on the top of the workbench (1) and an inner fixing seat (3) slidably installed on the top of the workbench (1). Both the outer fixing seat (2) and the inner fixing seat (3) have through holes. The electrode rod (4) passes through the two through holes. The starting end of the electrode rod (4) is connected to the drive system (6) installed on the top of the workbench (1). The drive system (6) drives the electrode rod (4) to move axially, and the two are connected by a limited rotation.

3. The automatic cleaning device for spot welding machine electrodes according to claim 2, characterized in that: The cleaning structure also includes an installation box (7) installed on the outer wall of the inner fixed seat (3). A fixed frame (8) is horizontally slidably installed inside the installation box (7). An adjusting plate (15) is vertically slidably installed on the inner wall of the fixed frame (8). The chip collection plate (13) is fixed on the top of the adjusting plate (15). A slider (18) is installed at the bottom of the installation box (7). A connecting rod (21) is rotatably connected between the slider (18) and the adjusting plate (15). A limiting rod (26) is installed on the outer wall of the outer fixed seat (2). One end of the limiting rod (26) passes through the inner fixed seat (3) and the installation box (7) and is fixedly connected to the outer wall of the fixed frame (8). The outer walls of the inner fixed seat (3) and the installation box (7) are both provided with holes through which the limiting rod (26) can pass.

4. The automatic cleaning device for spot welding machine electrodes according to claim 3, characterized in that: The delay component includes a sleeve (9) rotatably mounted on the outer wall of the electrode rod (4). The sleeve (9) passes through the through hole on the outer wall of the inner fixing seat (3) and is slidably connected to the inner wall of the through hole by a flat key. The ends of the sleeve (9) on both sides of the inner fixing seat (3) are formed with ring buckles.

5. The automatic cleaning device for spot welding machine electrodes according to claim 4, characterized in that: An airbag (10) fitted on the outer wall of the electrode rod (4) is installed between the ring at the end of the sleeve (9) and the outer fixing seat (2). The outer wall of the airbag (10) is provided with an air outlet that can only release air in one direction. The outer wall of the airbag (10) is also connected to a one-way air tube (27). The free end of the one-way air tube (27) passes through the limiting rod (26) and communicates with the sealed space below the adjusting plate (15). A one-way valve is installed in the one-way air tube (27). The bottom of the fixing frame (8) is provided with a first sliding groove (16). The bottom of the mounting box (7) is provided with a second sliding groove (17). 7) The slider (18) is slidably installed in the first slide groove (16) and the second slide groove (17), and the inner wall of the first slide groove (16) is equipped with an elastic pin for locking the slider (18). A spring (19) is also installed between the slider (18) and the inner wall of the second slide groove (17). The connecting rod (21) has a suction channel (22) inside, and the adjusting plate (15) has a collection groove (23) extending into the chip collection plate (13) inside. When the connecting rod (21) rotates beyond a preset angle, the suction channel (22) communicates with the collection groove (23).

6. The automatic cleaning device for spot welding machine electrodes according to claim 5, characterized in that: The inner wall of the first slide (16) is also equipped with a pressure-sensitive switch (20), and the pressure-sensitive switch (20) is connected to the drive system (6) by an electrical signal through the control system.

7. The automatic cleaning device for spot welding machine electrodes according to claim 5, characterized in that: The bottom of the fixed frame (8) is also fixed with a baffle (24), and the outlet direction of the suction channel (22) is towards the storage area separated by the baffle (24).

8. The automatic cleaning device for spot welding machine electrodes according to claim 3, characterized in that: The outer wall of the mounting box (7) is fixed with an adjusting sleeve (25), the outer wall of the inner fixing seat (3) is provided with a vertical groove for the adjusting sleeve (25) to slide vertically, and the outer wall of the outer fixing seat (2) is also provided with a vertical groove for the limiting rod (26) to adjust synchronously.

9. The automatic cleaning device for spot welding machine electrodes according to claim 5, characterized in that: During the travel of the mounting box (7), the edge of the second groove (17) is always dynamically sealed to the bottom of the fixed frame (8).

10. The automatic cleaning device for spot welding machine electrodes according to any one of claims 1-9, characterized in that: The driving component includes a gear (11) that is rotatably mounted on the outer wall of the inner fixed seat (3). The electrode rod (4) passes through the center of the gear (11) and is slidably connected to the through point of the gear (11) by a flat key. A driving part (12) is installed on the top of the inner fixed seat (3), and the driving part (12) is used to drive the gear (11) to rotate.

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