Automatic arc welding machine for chain welding and control method thereof

Abstract

The application discloses an automatic electric arc welding machine for chain welding and a control method thereof, and relates to the technical field of electric arc welding, which comprises a side plate and a control module. The side wall of the side plate is fixedly connected with a fixing table. A groove penetrating through front and back is formed in the middle of the upper side of the fixing table. The side wall of the side plate is fixedly connected with a baffle on the lower part of both sides of the fixing table. The lower end of each of the two baffles is rotatably connected with a gear through a bearing. One end of the gear on the right side is provided with a rotation angle detection module. The copper contact and the resistance detection module are arranged. The resistance value of the chain link is measured before welding and is transmitted to the control module. The power of the argon arc welding machine can be intelligently adjusted according to the material or oxidation degree of the chain link. The power shortage caused by virtual welding or the power overlarge caused by burning through can be avoided. The energy utilization rate and the welding adaptability are improved. The chain link state can be sensed in real time, and the welding parameters can be dynamically adjusted according to the chain link state.

Description

Technical Field

[0001] This invention relates to the field of arc welding technology, specifically to an automatic arc welding machine for chain welding and its control method. Background Technology

[0002] Chains, as crucial components widely used in industrial conveying, mechanical transmission, and heavy-duty bearing, directly impact the operational stability and safety of end-use equipment through their manufacturing quality. In chain production, the chain link welding process plays a decisive role in the overall chain's mechanical properties, connection strength, and lifespan. Early chain welding primarily relied on manual arc welding. While skilled welders could achieve some quality assurance, this method resulted in low production efficiency, poor product consistency, and high labor intensity for operators, failing to meet the demands of modern industry for high-quality, high-volume, and highly consistent products.

[0003] With the development of automation technology, chain welding equipment is gradually evolving towards automation. Existing chain welding equipment mostly adopts fixed-station or transmission-clamping mechanisms, working in conjunction with an arc welding machine to weld the broken ends of chain links. This type of equipment generally includes a chain drive device, a chain link positioning and clamping device, a welding mechanism, and some control devices. A motor drives the chain to move in a specific direction, precisely positioning the chain links at the welding station. The clamps fix the chain link positions, and then the arc welding machine performs the welding operation. Some devices complete the welding process by setting welding parameters, initially achieving continuous operation and automation, thus improving work efficiency. For example, Chinese Patent Publication No. CN117139939B discloses a welding fixing device for chain processing. This device, through a matching positioning component, clamps and fixes the chain to the side before welding with two positioning bars, and includes a chain top component to prevent chain link jamming. It also features an automatic lubrication component to improve the stability of the device's operation. This technical solution represents an improvement over traditional welding operations in terms of structural design and automation, enabling continuous chain welding and effectively enhancing production line efficiency. However, with the increasing diversification of chain applications (such as special anti-skid chains, high-load engineering chains, and irregularly shaped chains), users are placing higher demands on welding precision, quality consistency, adaptability, and intelligent control. Existing automated chain welding devices still have shortcomings in the following key technical aspects:

[0004] Firstly, regarding the adaptability of chain link dimensions and the control of positioning accuracy, existing positioning mechanisms typically use mechanical structures (such as locking cones, clamping bars, etc.) to physically limit the chain links, making it difficult to adaptively adjust to differences in parameters such as chain link width, thickness, and break height. When chain batches are switched or chain link dimensions fluctuate, inaccurate positioning can easily lead to weld misalignment or fluctuations in welding quality.

[0005] Second: In terms of chain link break location identification and welding parameter control capabilities, this type of equipment lacks a real-time break detection module. It cannot automatically identify and dynamically respond to key parameters such as break spacing, angle, and material. It still relies on manual setting of parameters such as welding current, voltage, and wire feed speed. The welding process does not respond sufficiently to the actual state of the chain link, resulting in problems such as incomplete welding, burn-through, or unstable control of the molten pool.

[0006] Therefore, there is an urgent need for an intelligent welding system that can sense the status of the chain links in real time and dynamically adjust the welding parameters accordingly, so as to improve the stability of the chain welding process and the consistency of welding quality. Summary of the Invention

[0007] The purpose of this invention is to provide an automatic arc welding machine for chain welding and its control method, so as to solve the problems mentioned in the background art.

[0008] To solve the above-mentioned technical problems, the present invention provides the following technical solution: an automatic arc welding machine for chain welding, including a side plate and a control module, wherein a fixed platform is fixedly connected to the side wall of the side plate, and a through groove is provided in the upper middle part of the fixed platform. Baffles are fixedly connected to the lower part of both sides of the side wall of the side plate at the fixed platform, and gears are rotatably connected to the lower end of the two baffles away from the side plate through bearings. A rotation angle detection module is provided at one end of the gear on the right side.

[0009] The outer wall of the rotation angle detection module is fixedly connected to the outer wall of the side plate, and the input end of the rotation angle detection module is fixedly connected to one end of the gear. The rotation angle detection module is used to detect the rotation angle and number of turns of the right gear, and the rotation angle detection module is electrically connected to the control module.

[0010] A hydraulic rod is fixedly connected to the side wall of the side plate at the lower side of the fixed platform. A push block is fixedly connected to the upper end of the hydraulic rod. Limit sleeves are fixedly connected to the side wall of the side plate at the upper front side and the upper rear side of the push block. A clamping rod is slidably connected to the inner wall of the limit sleeve. The lower end of the clamping rod contacts the upper side of the push block, and the upper side of the clamping rod extends into the groove opened on the upper part of the fixed platform.

[0011] A welding mechanism is provided on the rear side of the side plate, and an identification mechanism is provided on the front side of the side plate.

[0012] The welding mechanism includes a moving component and an argon arc welding machine on the moving component, and the argon arc welding machine is used to weld the broken surface of the chain buckle.

[0013] The identification mechanism includes a fixed component and a visual recognition module. The visual recognition module is used to identify the distance of the chain break and the height of the chain buckle break.

[0014] According to the above technical solution, the lower ends of the two clamping rods contact the front side of the upper surface of the push block and the rear side of the upper surface of the push block, respectively. When the push block rises, the upper ends of the two clamping rods can be closed. The clamping rods are used to clamp the chain buckle so that its broken surface faces upward.

[0015] According to the above technical solution, the fixed platform is a trapezoid with a flat top, inclined sides, and a through groove in the middle. The two baffles and the fixed platform form a chain moving platform. The middle of the chain is located on the upper side of the fixed platform, and the two ends of the chain are led out from the lower side of two gears. The outer wall of the fixed platform does not contact the outer wall of the baffles.

[0016] According to the above technical solution, the side wall of the side plate is also fixedly connected to an air duct, which is located on the upper left side of the right side baffle, with the output end of the air duct facing downward.

[0017] According to the above technical solution, the moving component includes a first motor, the outer wall of the first motor is fixedly connected to the rear side of the side plate, a threaded rod is fixedly connected to the output end of the first motor, a threaded sleeve is threadedly connected to the outer wall of the threaded rod, a sliding frame is fixedly connected to the outer wall of the threaded sleeve, one side of the sliding frame is slidably connected to the rear side of the outer wall of the side plate, a resistance detection mechanism is provided on the side wall of the sliding frame, the argon arc welding machine is disposed on the upper side of the sliding frame near the fixed platform, the outer wall of the argon arc welding machine is fixedly connected to the inner wall of the sliding frame, a second motor is also fixedly connected to the outer wall of the sliding frame, a fixed tube is also fixedly connected to the sliding frame above the argon arc welding machine, a rubber wheel is fixedly connected to the output end of the second motor, and one side of the rubber wheel is located inside the fixed tube.

[0018] According to the above technical solution, the fixing tube is a tubular structure that runs vertically through the tube, and one side of the rubber wheel extends into the interior of the fixing tube, with the lower end of the fixing tube facing the output end of the argon arc welding machine.

[0019] According to the above technical solution, the resistance detection mechanism includes an electric telescopic rod, one end of which is hinged to the outer wall of the sliding frame, and the other end of which is hinged to a hinge arm. The rear end of the hinge arm is hinged to the outer wall of the sliding frame, the middle part of the hinge arm is hinged to the front end of the electric telescopic rod, and the front end of the hinge arm is hinged to a copper contact via a torsion spring. A resistance detection module is provided on the upper side of the outer wall of the sliding frame.

[0020] According to the above technical solution, copper contacts are provided on both the left and right sides of the sliding frame. The two copper contacts are electrically connected to the resistance detection module, and the upper side of the copper contacts is lower than the lower side of the argon arc welding machine.

[0021] According to the above technical solution, the fixing component includes a fixing plate, the inner wall of the fixing plate is fixedly connected to the outer wall of the visual recognition module, and the input end of the visual recognition module faces the upper side of the fixing platform. A third motor is fixedly connected to the outer wall of the fixing plate at the lower side of the visual recognition module. A fixing frame is fixedly connected to the outer wall of the third motor. A baffle is fixedly connected to the inner wall of the fixing frame. The fixing frame is made of rubber.

[0022] A control method for an automatic arc welding machine for chain welding, based on the aforementioned automatic arc welding machine for chain welding, includes the following five steps:

[0023] Step 1: Use the traction device to move the chain, and use the rotation angle detection module to detect the position of the chain buckle. Stop the chain movement when the chain buckle is detected to be directly above the fixed platform.

[0024] Step 2: Start the hydraulic rod to drive the push block to rise, and clamp and position the chain buckle through the symmetrically arranged clamping rods so that the broken end of the chain buckle faces upward. After clamping is completed, it will descend and reset. The vision recognition module collects the distance and height on both sides of the broken end of the chain buckle and transmits the recognition results to the control module.

[0025] Step 3: The first motor drives the threaded rod to rotate, causing the sliding frame to move vertically downward. Based on the recognition result, the downward stroke of the sliding frame is controlled so that the argon arc welding machine approaches and aligns with the chain buckle welding surface.

[0026] Step 4: During the downward movement of the sliding frame, the two copper contacts on the left and right sides contact the chain buckle surface and form a resistance detection circuit. The resistance detection module obtains the chain buckle resistance value and uploads it to the control module. The control module automatically adjusts the welding current power and welding time according to the resistance value, and then raises the copper contacts to avoid the high-temperature welding area.

[0027] Step 5: Control the second motor to drive the rubber wheel to feed the welding wire and guide it into the chain break area through the fixed tube. At the same time, control the argon arc welding machine to perform argon arc welding. After welding is completed, stop feeding the wire and welding. The first motor reverses to reset the sliding frame and the chain continues to run. At the same time, the air duct sprays out cooling air along the chain surface to carry away the welding heat.

[0028] Compared with the prior art, the beneficial effects achieved by the present invention are: by setting clamping rods, hydraulic rods and push blocks, the present invention can clamp and position the chain buckle with the broken end facing upward after the chain buckle moves to the welding station, ensuring a stable and consistent welding position, avoiding welding gun deviation or weld misalignment, and improving welding accuracy and finished product qualification rate.

[0029] By installing air ducts, the heat of the weld can be quickly removed after welding, reducing the width of the heat-affected zone and the accumulation of residual stress. At the same time, the cooling airflow guides the argon gas downwards, reducing the oxygen concentration and effectively improving the metal microstructure quality and crack resistance of the welded area.

[0030] By incorporating copper contacts and a resistance detection module, the resistance value of the chain buckle is measured before welding and transmitted to the control module. This allows for intelligent adjustment of the argon arc welding machine power based on the chain buckle material or oxidation level, preventing incomplete welding due to insufficient power or burn-through due to excessive power, thereby improving energy efficiency and welding adaptability.

[0031] Equipped with a visual recognition module, a third motor, a fixed frame, and baffles, the distance and height between the two sides of the break can be accurately identified after the chain is positioned. Based on this, the descent distance of the argon arc welding machine and the amount of wire supplied by the rubber wheel can be adjusted to achieve precise control of welding parameters, avoid wire accumulation or insufficient filling, and improve the integrity and strength of the welded joint. Attached Figure Description

[0032] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0033] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0034] Figure 2 This is a schematic diagram of the rear structure of the present invention;

[0035] Figure 3 This is a schematic diagram of the disassembled structure of the present invention;

[0036] Figure 4 This is a schematic diagram of the welding mechanism structure of the present invention;

[0037] Figure 5 This is a partial structural diagram of the welding mechanism of the present invention;

[0038] Figure 6 This is a schematic diagram of the identification mechanism structure of the present invention;

[0039] In the diagram: 1. Side plate; 2. Fixed platform; 3. Baffle; 4. Gear; 5. Rotation angle detection module; 6. Air duct; 7. Hydraulic rod; 8. Push block; 9. Limit sleeve; 10. Clamping rod; 11. Welding mechanism; 12. Identification mechanism; 101. First motor; 102. Threaded rod; 103. Threaded sleeve; 104. Sliding frame; 105. Resistance detection mechanism; 106. Argon arc welding machine; 107. Second motor; 108. Fixed pipe; 109. Rubber wheel; 501. Electric telescopic rod; 502. Hinge arm; 503. Copper contact; 504. Resistance detection module; 201. Fixed plate; 202. Visual recognition module; 203. Third motor; 204. Fixed frame; 205. Baffle. Detailed Implementation

[0040] 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.

[0041] Example 1:

[0042] Please see Figure 1-5 This invention provides a technical solution: an automatic arc welding machine for chain welding, comprising two side plates 1 and a control module. A fixed platform 2 is fixedly connected between the side walls of the two side plates 1. A through groove is formed in the upper center of the fixed platform 2. Baffles 3 are fixedly connected to the lower parts of the side walls of the side plates 1 on both sides of the fixed platform 2. Gears 4 are rotatably connected to the lower ends of the two baffles 3 away from the side plates 1 via bearings. A rotation angle detection module 5 is provided at one end of the right gear 4. The outer wall of the rotation angle detection module 5 is fixedly connected to the outer wall of the side plate 1, and the input end of the rotation angle detection module 5 is fixedly connected to one end of the gear 4. The rotation angle detection module 5 is used to detect the rotation angle and number of revolutions of the right gear 4. The rotation angle detection module 5 is electrically connected to the control module. A hydraulic rod 7 is fixedly connected to the side wall of the side plate 1 at the lower side of the fixed platform 2. A push block 8 is fixedly connected to the upper end of the hydraulic rod 7. A limit sleeve 9 is fixedly connected to the side wall of the side plate 1 at the upper front side and the upper rear side of the push block 8. A clamping rod 10 is slidably connected to the inner wall of the limit sleeve 9. The lower end of the clamping rod 10 contacts the upper side of the push block 8, and the upper side of the clamping rod 10 extends into the groove opened on the upper part of the fixed platform 2. A welding mechanism 11 is also provided on the rear side of the rear side plate 1, and an identification mechanism 12 is provided on the front side of the front side plate 1.

[0043] The lower ends of the two clamping rods 10 contact the front side of the upper surface of the push block 8 and the rear side of the upper surface of the push block 8, respectively. When the push block 8 rises, the upper ends of the two clamping rods 10 can close together. The clamping rods 10 are used to clamp the chain buckle so that its broken surface faces upward. The fixed platform 2 is a trapezoid with a flat upper side, inclined sides and a through groove in the middle. The two baffles 3 and the fixed platform 2 form a chain moving platform. The middle part of the chain is located on the upper side of the fixed platform 2, and the two ends of the chain are led out from the lower side of the two gears 4. The outer wall of the fixed platform 2 does not contact the outer wall of the baffle 3. The side wall of the side plate 1 is also fixedly connected to the air duct 6. The air duct 6 is located on the upper left side of the right baffle 3, and the output end of the air duct 6 faces downward.

[0044] The welding mechanism 11 includes a moving component and an argon arc welding machine 106 on the moving component. The argon arc welding machine 106 is used to weld the broken surface of the chain link. The moving component includes a first motor 101. The outer wall of the first motor 101 is fixedly connected to the rear side of the side plate 1. A threaded rod 102 is fixedly connected to the output end of the first motor 101. A threaded sleeve 103 is threadedly connected to the outer wall of the threaded rod 102. A sliding frame 104 is fixedly connected to the outer wall of the threaded sleeve 103. One side of the sliding frame 104 is slidably connected to the rear side of the outer wall of the side plate 1. A resistance detection mechanism 105 is provided on the side wall of the sliding frame 104. The argon arc welding machine 106 is equipped with... The argon arc welding machine 106 is placed on the sliding frame 104 near the upper side of the fixed platform 2. The outer wall of the argon arc welding machine 106 is fixedly connected to the inner wall of the sliding frame 104. The outer wall of the sliding frame 104 is also fixedly connected to the second motor 107. A fixed tube 108 is also fixedly connected to the sliding frame 104 above the argon arc welding machine 106. A rubber wheel 109 is fixedly connected to the output end of the second motor 107. One side of the rubber wheel 109 is located inside the fixed tube 108. The fixed tube 108 is a tubular structure that runs through the top and bottom. One side of the rubber wheel 109 extends into the fixed tube 108. The lower end of the fixed tube 108 faces the output end of the argon arc welding machine 106.

[0045] In practical application, one end of the chain is introduced from the lower side of the left gear 4, then passes the upper side of the fixed platform 2 and exits from the lower side of the right gear 4. The chain is moved by the traction device in the production line. The rotation angle detection module 5 detects the rotation angle of the gear 4, and the control module calculates the chain link movement distance. When the next chain link moves to the upper side of the fixed platform 2, the traction device is turned off, and then the hydraulic rod 7 is activated to lift the push block 8. This causes the upper side of the push block 8 to push the two clamping rods 10 to deflect under the limit of the limiting sleeve 9. Since the chain link breakage direction is consistent during chain production, the upward clamping of the two clamping rods 10 will clamp the chain link in a vertical state. At this time, the broken side of the chain link is on the upper side. Then, the hydraulic rod 7 is activated to lower the push block 8, thereby resetting the clamping rods 10. The control module starts the first motor 101 to drive the threaded rod 102 to rotate, causing the sliding frame 104 to descend. Before production, the chain buckle height and the original height of the argon arc welding machine 106 can be preset, as well as the welding time and wire feeding length can be preset. When the argon arc welding machine 106 descends to the preset value, the second motor 107 is started to drive the rubber wheel 109 to rotate, which in turn causes the rubber wheel 109 to drive the welding wire inserted inside the fixed tube 108 to move down. While replenishing the welding wire, the argon arc welding machine 106 is started to perform argon arc welding, so that the welding wire forms a molten pool at the chain buckle break and flows into the break, thereby completing the welding of the chain. Then, the argon arc welding machine 106 and the second motor 107 are turned off, and the first motor 101 is started to drive the sliding frame 104 to reset. The chain is moved by the traction device, so that the next chain buckle moves to the upper side of the fixed platform 2 to complete the welding process.

[0046] During this process, the external air supply device is connected to the upper input end of the air duct 6, so that the airflow is sprayed out through the lower side of the air duct 6 and flows downward with the upper surface of the baffle 3. This allows the airflow to quickly remove the heat from the weld joint of the chain after welding, accelerate the cooling speed, reduce thermal deformation and residual stress accumulation. Furthermore, since the airflow passes through the gap between the fixed platform 2 and the baffle 3, the air pressure in the gap between the fixed platform 2 and the baffle 3 decreases. As a result, the argon gas discharged downward during the welding process of the argon arc welding machine 106 can be driven downward by the airflow through the gap between the fixed platform 2 and the baffle 3, thereby effectively utilizing the discharged argon gas to reduce the oxygen content of the cooling airflow.

[0047] Example 2:

[0048] Please see Figure 1-5 Based on Embodiment 1, a technical solution is provided: the resistance detection mechanism 105 includes an electric telescopic rod 501, one end of which is hinged to the outer wall of the sliding frame 104, and the other end of which is hinged to a hinge arm 502. The rear end of the hinge arm 502 is hinged to the outer wall of the sliding frame 104, and the middle part of the hinge arm 502 is hinged to the front end of the electric telescopic rod 501. The front end of the hinge arm 502 is hinged to a copper contact 503 via a torsion spring. A resistance detection module 504 is provided on the upper side of the outer wall of the sliding frame 104. Copper contacts 503 are provided on both the left and right sides of the sliding frame 104. The two copper contacts 503 are electrically connected to the resistance detection module 504. The upper side of the copper contacts 503 is lower than the lower side of the argon arc welding machine 106.

[0049] When welding the chain buckle in this device, the sliding frame 104 moves downward, causing the lower side of the copper contact 503 to first contact the upper surface of the chain buckle. At this time, the resistance detection module 504 discharges, forming a current path from the left copper contact 503 to the chain buckle and then to the right copper contact 503. This allows the resistance detection module 504 to monitor the resistance of the chain buckle. Since the resistance detection module 504 is electrically connected to the control module, the control module can dynamically adjust the working power of the argon arc welding machine 106 based on the resistance of the chain buckle. Then, the electric telescopic rod 501 is activated to lift the hinge arm 502, causing the copper contact 503 to detach from the chain buckle surface, preventing the copper contact 503 from contacting the high-temperature chain buckle during welding. After welding is completed and the sliding frame 104 resets, the electric telescopic rod 501 retracts, causing the hinge arm 502 to reset, thus preventing insufficient power from causing a poor weld or excessive power from causing burn-through.

[0050] Example 3:

[0051] Please see Figure 1-6Based on Embodiment 1 and Embodiment 2, a technical solution is provided: the identification mechanism 12 includes a fixing component and a visual identification module 202. The visual identification module 202 is used to identify the distance of the chain break and the height of the chain buckle break. The fixing component includes a fixing plate 201. The inner wall of the fixing plate 201 is fixedly connected to the outer wall of the visual identification module 202, and the input end of the visual identification module 202 faces the upper side of the fixing platform 2. A third motor 203 is fixedly connected to the outer wall of the fixing plate 201 at the lower side of the visual identification module 202. A fixing frame 204 is fixedly connected to the outer wall of the third motor 203. A baffle 205 is fixedly connected to the inner wall of the fixing frame 204. The fixing frame 204 is made of rubber.

[0052] After each chain link moves to the upper side of the fixed platform 2, the control module starts the third motor 203 to drive the fixed frame 204 and the baffle 205 to rotate and disengage from the output end of the vision recognition module 202. Then, the vision recognition module 202 detects the distance between the inner walls on both sides of the chain link break and calculates the chain link height. Subsequently, the third motor 203 drives the fixed frame 204 and the baffle 205 to rotate and reset to block and protect the output end of the vision recognition module 202. At this time, the control module detects the chain link height through the vision recognition module 202 and dynamically adjusts the descent height of the sliding frame 104. It also adjusts the rotation angle of the rubber wheel 109 driven by the second motor 107 based on the distance detected by the vision recognition module 202 between the inner walls on both sides of the chain link break, thereby adjusting the amount of wire fed to avoid feeding too much or too little wire.

[0053] Example 4:

[0054] Please see Figure 1-6 Based on Embodiment 1, Embodiment 2 and Embodiment 3, a technical solution is provided: the size and opening position of the chain buckle are obtained by the visual recognition module 202, and the material resistance of the chain buckle located on the upper side of the fixed platform 2 is obtained by the copper contact 503 and the resistance detection module 504. Then, the control module performs joint matching adjustment of the power, descent depth and wire feed of the argon arc welding machine 106 to achieve adaptive welding parameter control of one chain and one policy.

[0055] Among them, the chain link resistance can be detected by voltage and current sampling according to Ohm's law;

[0056]

[0057] in: For this chain buckle resistor, This refers to the voltage between the two copper contacts 503 and the contact point of the chain link. The current passing through the chain link;

[0058] The control module dynamically adjusts the welding power based on the chain buckle resistance.

[0059]

[0060] or

[0061]

[0062] in This refers to the welding power.

[0063] The welding torch descent height is adjusted based on the chain link height detected by the vision recognition module 202:

[0064]

[0065] in To lower the height of the argon arc welding machine 106, For the preset reference height, The visual recognition module 202 detects the height of the upper surface of the chain buckle;

[0066] Furthermore, the control module calculates the wire feeding length based on the cut width:

[0067]

[0068] in For wire feeding length, The distance between the fracture surfaces. This is the wire feeding compensation coefficient;

[0069] The formula for estimating the melting rate of welding wire in synchronous wire feeding is:

[0070]

[0071] in The melting speed of the welding wire, For welding current, For arc thermal efficiency, Density of welding wire material The cross-sectional area of ​​the welding wire. This refers to the latent heat of the welding wire.

[0072] A control method for an automatic arc welding machine for chain welding, based on the aforementioned automatic arc welding machine for chain welding, includes the following five steps:

[0073] Step 1: Use the traction device to drive the chain to move, and use the rotation angle detection module 5 to detect the position of the chain buckle. When the chain buckle is detected to be directly above the fixed platform 2, stop the chain movement.

[0074] Step 2: Start the hydraulic rod 7 to drive the push block 8 to rise, and clamp and position the chain buckle through the symmetrically arranged clamping rods 10 so that the broken end of the chain buckle faces upward. After clamping is completed, it is lowered and reset. The visual recognition module 202 collects the distance and height on both sides of the broken end of the chain buckle and transmits the recognition result to the control module.

[0075] Step 3: The first motor 101 drives the threaded rod 102 to rotate, causing the sliding frame 104 to move vertically downward. Based on the recognition result, the downward stroke of the sliding frame 104 is controlled so that the argon arc welding machine 106 approaches and aligns with the chain fastener welding surface.

[0076] Step 4: During the downward movement of the sliding frame 104, the two copper contacts 503 on the left and right sides contact the chain buckle surface and form a resistance detection circuit. The resistance detection module 504 obtains the chain buckle resistance value and uploads it to the control module. The control module automatically adjusts the welding current power and welding time according to the resistance value, and then raises the copper contacts 503 to avoid the high-temperature welding area.

[0077] Step 5: Control the second motor 107 to drive the rubber wheel 109 to feed the welding wire and guide the welding wire into the chain buckle break area through the fixed tube 108. At the same time, control the argon arc welding machine 106 to perform argon arc welding. After the welding is completed, stop feeding the wire and welding. The first motor 101 reverses to reset the sliding frame 104 and the chain continues to run. At the same time, the air duct 6 sprays out cooling airflow along the chain surface to carry away the welding heat.

[0078] This solution provides an automatic arc welding machine and its control method for chain welding. The chain is transported to the fixed platform 2 via gear 4 and a traction device. A rotation angle detection module 5 monitors the chain position in real time to ensure precise chain buckle positioning. Hydraulic rod 7, push block 8, and limit sleeve 9 are activated to clamp and flip the chain buckle's fracture surface vertically upwards, ensuring accurate welding surface positioning. A vision recognition module 202 accurately detects the distance and height between the inner walls on both sides of the chain buckle's fracture surface. The control module adjusts the descent height of the argon arc welding machine 106 and the wire feed length accordingly to ensure welding parameters match the chain buckle dimensions. During the descent of the welding mechanism, a resistance detection mechanism 105 contacts the chain buckle surface to dynamically measure the chain buckle resistance. The control module adjusts the welding power and time based on the resistance value to achieve precise control of the welding current. After welding, the air duct 6 sprays air above the baffle 3 to quickly remove heat from the weld, reducing thermal deformation and residual stress. The entire process is coordinated to ensure stable and reliable welding quality, adapt to the physical differences of different chain buckles, and improve production efficiency and automation.

[0079] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0080] Finally, it should be noted that the above descriptions are merely 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 make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An automatic arc welding machine for chain welding, comprising two side plates (1) and a control module, characterized in that: A fixed platform (2) is fixedly connected between the side walls of the two side plates (1). A groove that runs through the front and back is opened in the middle of the upper side of the fixed platform (2). Baffles (3) for supporting the chain are connected to the lower parts of both sides of the fixed platform (2). The baffles (3) are fixed on the side walls of the side plates (1). The lower ends of the two baffles (3) are rotatably connected to gears (4) through bearings. The gear (4) on the right side is connected to a rotation angle detection module (5). The outer wall of the rotation angle detection module (5) is fixedly connected to the outer wall of the side plate (1), and the input end of the rotation angle detection module (5) is fixedly connected to one end of the gear (4). The rotation angle detection module (5) is used to detect the rotation angle and number of turns of the right gear (4), and the rotation angle detection module (5) is electrically connected to the control module. Hydraulic rods (7) and push blocks (8) are provided on the side wall of the side plate (1). Limiting sleeves (9) are fixedly connected to the side wall of the side plate (1) in front of the push block (8) and behind the push block (8). A clamping rod (10) is slidably connected to the inner wall of the limiting sleeve (9). Under the action of the push block (8), the upper end of the clamping rod (10) can enter the groove above the fixed platform (2) to clamp the chain buckle and adjust the orientation of the chain buckle break. A welding mechanism (11) is provided on the rear side of one of the side plates (1), and an identification mechanism (12) is provided on the front side of the other side plate (1). The welding mechanism (11) includes a moving component and an argon arc welding machine (106) on the moving component, and the argon arc welding machine (106) is used to weld the broken surface of the chain buckle; The identification mechanism (12) includes a fixed component and a visual identification module (202), which is used to identify the distance of the chain break and the height of the chain buckle break.

2. The automatic arc welding machine for chain welding according to claim 1, characterized in that: The lower ends of the two clamping rods (10) respectively contact the front side of the upper surface of the push block (8) and the rear side of the upper surface of the push block (8). When the push block (8) rises, it can drive the upper ends of the two clamping rods (10) to close inward and position the chain buckle break facing upward at the welding position.

3. An automatic arc welding machine for chain welding according to claim 2, characterized in that: The fixed platform (2) is a trapezoid with a flat top, inclined sides, and a through groove in the middle. The two baffles (3) and the fixed platform (2) form a chain moving platform. During the conveying process, the middle of the chain is located on the upper side of the fixed platform (2), and the two ends of the chain are led out by the gears (4) on the lower side of the two baffles (3). The outer wall of the fixed platform (2) does not contact the outer wall of the baffles (3).

4. An automatic arc welding machine for chain welding according to claim 3, characterized in that: The side wall of the side plate (1) is also fixedly connected to a duct (6), which is located on the upper left side of the right side baffle (3), with the output end of the duct (6) facing downward.

5. An automatic arc welding machine for chain welding according to claim 4, characterized in that: The moving component includes a first motor (101), the outer wall of which is fixedly connected to the rear side of the side plate (1). A threaded rod (102) is fixedly connected to the output end of the first motor (101). A threaded sleeve (103) is threadedly connected to the outer wall of the threaded rod (102). A sliding frame (104) is fixedly connected to the outer wall of the threaded sleeve (103). One side of the sliding frame (104) is slidably connected to the rear side of the outer wall of the side plate (1). A resistance detection mechanism (105) is provided on the side wall of the sliding frame (104). The argon arc welding machine (106) is set on the sliding frame (104) near the upper side of the fixed platform (2). The outer wall of the argon arc welding machine (106) is fixedly connected to the inner wall of the sliding frame (104). The outer wall of the sliding frame (104) is also fixedly connected to a second motor (107). A fixed pipe (108) is also fixedly connected on the sliding frame (104) above the argon arc welding machine (106). A rubber wheel (109) is fixedly connected to the output end of the second motor (107). One side of the rubber wheel (109) is located inside the fixed pipe (108).

6. An automatic arc welding machine for chain welding according to claim 5, characterized in that: The fixed tube (108) is a tubular structure that runs vertically through the tube, and one side of the rubber wheel (109) extends into the interior of the fixed tube (108). The lower end of the fixed tube (108) faces the output end of the argon arc welding machine (106).

7. An automatic arc welding machine for chain welding according to claim 6, characterized in that: The resistance detection mechanism (105) includes an electric telescopic rod (501), one end of which is hinged to the outer wall of the sliding frame (104), and the other end of which is hinged to a hinge arm (502). The rear end of the hinge arm (502) is hinged to the outer wall of the sliding frame (104), and the middle part of the hinge arm (502) is hinged to the front end of the electric telescopic rod (501). The front end of the hinge arm (502) is hinged to a copper contact (503) by a torsion spring. A resistance detection module (504) is provided on the upper side of the outer wall of the sliding frame (104).

8. An automatic arc welding machine for chain welding according to claim 7, characterized in that: Copper contacts (503) are provided on both the left and right sides of the sliding frame (104). The two copper contacts (503) are electrically connected to the resistance detection module (504). The upper side of the copper contacts (503) is lower than the lower side of the argon arc welding machine (106).

9. An automatic arc welding machine for chain welding according to claim 8, characterized in that: The fixing component includes a fixing plate (201), the inner wall of the fixing plate (201) is fixedly connected to the outer wall of the visual recognition module (202), and the input end of the visual recognition module (202) faces the upper side of the fixing platform (2). A third motor (203) is fixedly connected to the outer wall of the fixing plate (201) at the lower side of the visual recognition module (202). A fixing frame (204) is fixedly connected to the outer wall of the third motor (203). A baffle (205) is fixedly connected to the inner wall of the fixing frame (204). The fixing frame (204) is made of rubber.

10. A control method for an automatic arc welding machine for chain welding, based on the automatic arc welding machine for chain welding mentioned in claims 1-9, characterized in that, It includes the following five steps: Step 1: Use the traction device to drive the chain to move, and use the rotation angle detection module (5) to detect the position of the chain buckle. When the chain buckle is detected to be directly above the fixed platform (2), stop the chain movement. Step 2: Start the hydraulic rod (7) to drive the push block (8) to rise. The chain buckle is clamped and positioned by the symmetrically arranged clamping rods (10) so that the broken end of the chain buckle faces upward. After clamping, it is lowered and reset. The visual recognition module (202) collects the distance and height on both sides of the broken end of the chain buckle and transmits the recognition result to the control module. Step 3: The first motor (101) drives the threaded rod (102) to rotate, causing the sliding frame (104) to move vertically downward. Based on the identification result, the downward stroke of the sliding frame (104) is controlled so that the argon arc welding machine (106) approaches and aligns with the chain fastener welding surface. Step 4: During the downward movement of the sliding frame (104), the two copper contacts (503) on the left and right sides contact the chain buckle surface and form a resistance detection circuit. The resistance detection module (504) obtains the chain buckle resistance value and uploads it to the control module. The control module automatically adjusts the welding current power and welding time according to the resistance value, and then raises the copper contacts (503) to avoid the high-temperature welding area. Step 5: Control the second motor (107) to drive the rubber wheel (109) to feed out the welding wire and guide the welding wire into the chain buckle break area through the fixed tube (108). At the same time, control the argon arc welding machine (106) to perform argon arc welding. After the welding is completed, stop feeding the wire and welding. The first motor (101) reverses to reset the sliding frame (104). The chain continues to run. At the same time, the air duct (6) sprays out cooling airflow along the chain surface to carry away the welding heat.

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