Automatic electric arc welding machine for chain welding and control method of automatic electric arc welding machine

Abstract

The invention 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, the automatic electric arc welding machine comprises a side plate and a control module, the side wall of the side plate is fixedly connected with a fixing table, and a front-back through groove is formed in the middle of the upper side of the fixing table; baffles are fixedly connected to the positions, located on the lower portions of the two sides of the fixed table, of the side wall of the side plate, gears are rotationally connected to the sides, away from the side plate, of the lower ends of the two baffles through bearings, and a rotation angle detection module is arranged at one end of the gear on the right side. The resistance value of the link shackle is measured before welding and 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 link shackle, pseudo soldering caused by insufficient power or burn-through caused by overlarge power is avoided, the energy utilization rate and welding adaptability are improved, and the production cost is reduced. The device has the characteristics of sensing the state of the chain shackle in real time and dynamically adjusting welding parameters according to the state.

Description

Technical Field

[0001] The present invention relates to the technical field of arc welding, in particular to an automatic arc welding machine for chain welding and a control method thereof. Background Art

[0002] Chains are essential components widely used in industrial conveying, mechanical transmission, and heavy-load bearing applications. Their manufacturing quality is directly linked to the operational stability and safety of end-use equipment. In the chain production process, the link welding process plays a decisive role in the mechanical properties, connection strength, and durability of the entire chain. Early chain welding relied primarily on manually operated arc welding. While some quality assurance could be achieved by skilled welders, this approach suffered from low production efficiency, poor product consistency, and high operator labor intensity, making it difficult to meet modern industry's demand 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 often uses fixed-station or transmission-clamping mechanisms, working in conjunction with an arc welder to weld the chain link fractures. This type of equipment generally includes a chain transmission device, a chain link positioning and clamping device, a welding mechanism, and some control devices. A motor drives the chain to move in a directional manner, allowing the chain link to precisely rest at the welding station. A clamp secures the chain link in place, and the arc welder then performs the welding operation. Some devices complete the welding process by setting welding parameters, initially achieving continuous operation and automated operation, thereby improving work efficiency. For example, the existing Chinese patent application CN117139939B discloses a welding fixture for chain processing. This device uses a matching positioning assembly to clamp and secure two positioning clamps to the side of the chain before welding. A chain top assembly is also provided to prevent the chain links from getting stuck, and an automatic lubrication assembly is also included to improve the device's operational stability. Compared to traditional welding operations, this technical solution has improved structural design and automation, enabling continuous chain welding operations and effectively improving production line efficiency. However, with the increasing diversification of chain application scenarios (such as special anti-skid chains, high-load engineering chains, and special-shaped chains), users have placed higher demands on welding accuracy, quality consistency, adaptability, and intelligent control. Existing automatic chain welding devices still have deficiencies in the following key technical aspects: First, regarding link size adaptability and positioning accuracy, existing positioning mechanisms typically use mechanical structures (such as retaining cones and clamps) to physically limit the link. This makes it difficult to adaptively adjust to differences in link width, thickness, and break height. When chain batches change or link sizes fluctuate, inaccurate positioning can easily lead to weld offsets and fluctuations in weld quality. Second: In terms of the ability to identify the position of the chain link fracture and control welding parameters, this type of equipment lacks a real-time fracture detection module, and cannot automatically identify and dynamically respond to key parameters such as fracture 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 enough to the actual state of the chain link, and there are problems such as cold welding, burn-through, or unstable molten pool control.

[0004] Therefore, there is an urgent need for an intelligent welding system that can sense the chain link status 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 the welding quality. Summary of the Invention

[0005] The object of the present invention is to provide an automatic arc welding machine for chain welding and a control method thereof, so as to solve the problems raised in the above background technology.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: an automatic arc welding machine for chain welding, comprising a side plate and a control module, wherein the side wall of the side plate is fixedly connected to a fixed platform, a groove running through the front and back is provided in the middle of the upper side of the fixed platform, baffles are fixedly connected to the side walls of the side plate at the lower parts of both sides of the fixed platform, and the lower ends of the two baffles are rotatably connected to gears via bearings on the sides away from the side plates, and a rotation angle detection module is provided at one end of the gear on the right side; 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; The side wall of the side plate is fixedly connected to a hydraulic rod at the lower side of the fixed platform, the upper end of the hydraulic rod is fixedly connected to a push block, the side wall of the side plate is fixedly connected to a limiting sleeve at the front side of the upper part of the push block and the rear side of the push block, the inner wall of the limiting sleeve is slidably connected to a clamping rod, the lower end of the clamping rod is in contact with the upper side of the push block, and the upper side of the clamping rod extends to the inside of a groove opened in the upper part of the fixed platform; The rear side of the side plate is further provided with a welding mechanism, and the front side of the side plate is provided with an identification mechanism; The welding mechanism includes a moving assembly and an argon arc welder on the moving assembly, and the argon arc welder is used to weld the fracture surface of the chain buckle; The identification mechanism includes a fixed component and a visual identification module, and the visual identification module is used to identify the chain break distance and the chain buckle break height.

[0007] According to the above technical solution, the lower ends of the two clamping rods are in contact with the front side of the upper surface of the push block and the rear side of the upper surface of the push block respectively. The push block rises to close the upper ends of the two clamping rods. The clamping rods are used to clamp the chain buckle so that its broken end faces upward.

[0008] According to the above technical solution, the fixed platform is a trapezoid with a flat upper side, inclined sides, and a front and rear through groove in the middle, and 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 the two gears. The outer wall of the fixed platform does not contact the outer wall of the baffle.

[0009] According to the above technical solution, the side wall of the side panel is further fixedly connected with an air duct, the air duct is located on the upper left end of the right baffle, and the output end of the air duct faces downward.

[0010] 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, the output end of the first motor is fixedly connected to a threaded rod, the outer wall of the threaded rod is threadedly connected to a threaded sleeve, the outer wall of the threaded sleeve is fixedly connected to a sliding frame, one side of the sliding frame is slidably connected to the rear side of the outer wall of the side plate, the side wall of the sliding frame is provided with a resistance detection mechanism, the argon arc welding machine is arranged on the sliding frame near the upper side of the fixed platform, the outer wall of the argon arc welding machine is fixedly connected to the inner wall of the sliding frame, the outer wall of the sliding frame is also fixedly connected to the second motor, and the sliding frame is also fixedly connected to a fixed tube at the upper side of the argon arc welding machine, the output end of the second motor is fixedly connected to a rubber wheel, and one side of the rubber wheel is located inside the fixed tube.

[0011] According to the above technical solution, the fixed tube is a tubular structure that penetrates from top to bottom, and one side of the rubber wheel extends into the inside of the fixed tube, and the lower end of the fixed tube faces the output end of the argon arc welding machine.

[0012] According to the above technical solution, the resistance detection mechanism includes an electric telescopic rod, one end of the electric telescopic rod is hinged to the outer wall of the sliding frame, the other end of the electric telescopic rod is hinged to an articulated arm, the rear end of the articulated arm is hinged to the outer wall of the sliding frame, the middle part of the articulated arm is hinged to the front end of the electric telescopic rod, the front end of the articulated arm is hinged to a copper contact through a torsion spring, and a resistance detection module is provided on the upper side of the outer wall of the sliding frame.

[0013] According to the above technical solution, copper contacts are provided on 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.

[0014] 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 fixed platform, the outer wall of the fixing plate is located at the lower side of the visual recognition module and is fixedly connected to a third motor, the outer wall of the third motor is fixedly connected to a fixing frame, the inner wall of the fixing frame is fixedly connected to a baffle, and the fixing frame is made of rubber.

[0015] A control method for an automatic arc welding machine for chain welding, based on the above-mentioned automatic arc welding machine for chain welding, includes the following five steps: Step 1: Use the traction device to drive the chain to move, and the rotation angle detection module detects the position of the chain link. When it is detected that the chain link has moved to the top of the fixed platform, the chain movement is stopped; Step 2: The hydraulic rod is activated to drive the push block upward, and the symmetrically arranged clamping rods clamp the chain link and position it so that the broken end of the chain link faces upward. After clamping, it is lowered and reset. The visual recognition module collects the distance and height between the two sides of the chain link broken end and transmits the recognition results to the control module; Step 3: The first motor drives the threaded rod to rotate, causing the sliding frame to move vertically downward. The downward movement of the sliding frame is controlled according to the recognition result so that the argon arc welder approaches and aligns with the welding surface of the chain link; Step 4: As the slide frame moves downward, the left and right copper contacts contact the surface of the chain link, forming a resistance detection circuit. The resistance detection module obtains the chain link resistance value and uploads it to the control module. The control module automatically adjusts the welding current power and welding time based on the resistance value, and then raises the copper contacts to avoid the high-temperature welding area. Step 5: Control the second motor to drive the rubber wheel to feed the welding wire and guide the welding wire into the chain buckle fracture area through the fixed tube. At the same time, control the argon arc welding machine to perform the argon arc welding operation. 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 cooling air along the chain surface to remove the welding heat.

[0016] Compared with the prior art, the present invention has the following beneficial effects: the present invention is provided with a clamping rod, a hydraulic rod, and a push block, which can clamp and position the chain link with the broken end facing upward after the chain link is moved to the welding station, thereby ensuring a stable and consistent welding position, avoiding welding gun deviation or weld misalignment, and improving welding accuracy and finished product qualification rate; The air duct can quickly remove the heat from the weld 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 downward to reduce the oxygen concentration, effectively improving the metal structure quality and crack resistance of the weld zone. By setting up copper contacts and a resistance detection module, the resistance value of the chain link is measured before welding and 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, avoiding false welds caused by insufficient power or burn-through caused by excessive power, thereby improving energy utilization and welding adaptability. By providing a visual recognition module and a third motor, a fixed frame, and a baffle, the distance and height on both sides of the fracture can be accurately identified after the chain link is positioned, and the descent distance of the argon arc welding machine and the wire supply amount of the rubber wheel can be adjusted accordingly, so as to achieve precise control of welding parameters, avoid welding wire accumulation or insufficient filling, and improve the integrity and strength of the welding joint. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying 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 and do not constitute a limitation of the present invention. In the accompanying drawings: Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the rear structure of the present invention; Figure 3 It is a schematic diagram of the split structure of the present invention; Figure 4 It is a structural schematic diagram of the welding mechanism of the present invention; Figure 5 It is a schematic diagram of the partial structure of the welding mechanism of the present invention; Figure 6 It is a schematic diagram of the structure of the identification mechanism of the present invention; In the figure: 1. Side panel; 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 tube; 109. Rubber wheel; 501. Electric telescopic rod; 502. Articulated arm; 503. Copper contact; 504. Resistance detection module; 201. Fixed plate; 202. Visual recognition module; 203. Third motor; 204. Fixed frame; 205. Baffle. DETAILED DESCRIPTION

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0019] Example 1: See also Figure 1-5 The present invention provides a technical solution: an automatic arc welding machine for chain welding, comprising two side panels 1 and a control module, wherein a fixed platform 2 is fixedly connected between the side walls of the two side panels 1, and a groove running through the front and back is provided in the middle of the upper side of the fixed platform 2, and the side walls of the side panels 1 are fixedly connected with baffles 3 at the lower parts of both sides of the fixed platform 2, and the lower ends of the two baffles 3 are rotatably connected to the sides of the side panels 1 through bearings, and a rotation angle detection module 5 is provided at one end of the gear 4 on the right side, and the outer wall of the rotation angle detection module 5 is fixedly connected to the outer wall of the side panel 1, and the input end of the rotation angle detection module 5 is fixedly connected to one end of the gear 4, rotating. 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. The side wall of the side panel 1 is located at the lower side of the fixed platform 2 and is fixedly connected to a hydraulic rod 7. The upper end of the hydraulic rod 7 is fixedly connected to a push block 8. The side wall of the side panel 1 is located at the upper front side of the push block 8 and the rear side of the push block 8 and is fixedly connected to a limiting sleeve 9. The inner wall of the limiting sleeve 9 is slidably connected to a clamping rod 10. 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 to the inside of 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 panel 1, and an identification mechanism 12 is provided on the front side of the front side panel 1. The lower ends of the two clamping rods 10 are in contact with 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. The push block 8 rises to close the upper ends of the two clamping rods 10. The clamping rods 10 are used to clamp the chain buckle so that its fracture face faces upward. The fixed platform 2 is a trapezoid with a flat upper side and inclined sides and a front and rear through groove in the middle. The two baffles 3 and the fixed platform 2 form a chain moving platform. 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 from the lower sides 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 panel 1 is also fixedly connected with an air duct 6. The air duct 6 is located on the upper left end of the right baffle 3, and the output end of the air duct 6 faces downward. The welding mechanism 11 includes a moving component and an argon arc welder 106 on the moving component, and the argon arc welder 106 is used to weld the broken surface of the chain buckle. 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, the output end of the first motor 101 is fixedly connected to a threaded rod 102, the outer wall of the threaded rod 102 is threadedly connected to a threaded sleeve 103, the outer wall of the threaded sleeve 103 is fixedly connected to a sliding frame 104, one side of the sliding frame 104 is slidably connected to the rear side of the outer wall of the side plate 1, the side wall of the sliding frame 104 is provided with a resistance detection mechanism 105, and the argon arc welder 106 is provided. It is placed on the sliding frame 104 near the upper side of the fixed table 2, the outer wall of the argon arc welding machine 106 is fixedly connected to the inner wall of the sliding frame 104, and the outer wall of the sliding frame 104 is also fixedly connected to the second motor 107. The sliding frame 104 is located on the upper side of the argon arc welding machine 106 and is also fixedly connected to a fixed tube 108. The output end of the second motor 107 is fixedly connected to a rubber wheel 109, and 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, and one side of the rubber wheel 109 extends to the inside of the fixed tube 108, and the lower end of the fixed tube 108 faces the output end of the argon arc welding machine 106; During the actual application of this device, one end of the chain is introduced from the lower side of the left gear 4, and then passed through the upper side of the fixed platform 2 and led out from the lower side of the right gear 4. The chain is moved by the traction device in the production line, and the rotation angle of the gear 4 is detected by the rotation angle detection module 5, and then the chain link movement distance is calculated by the control module. 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 started to lift the push block 8, so that the upper side of the push block 8 pushes the two clamping rods 10 to deflect under the limit of the limit sleeve 9. Since the chain link break direction is consistent during the chain production process, the two clamping rods 10 move up and clamp the chain link in a vertical state. At this time, one side of the chain link break is on the upper side, and then the hydraulic rod 7 is started to lower the push block 8, so that the clamping rod 10 is reset, and then The control module starts the first motor 101 to drive the threaded rod 102 to rotate and lower the sliding frame 104. Before production, the chain link 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. When the argon arc welding machine 106 reaches the preset height, the second motor 107 is started to drive the rubber wheel 109 to rotate, and the rubber wheel 109 drives the welding wire inserted in the fixed tube 108 to move downward. 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 link fracture and flows into the fracture, thereby completing the welding of the chain. Subsequently, 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 driven to move by the traction device, so that the next chain link moves to the upper side of the fixed table 2 to complete the welding process. During this process, an external air supply device is connected to the upper input end of the air duct 6, so that the air flow is ejected through the lower side of the air duct 6 and flows downward along the upper surface of the baffle 3, so that the air flow can quickly remove the heat from the chain weld after welding is completed, accelerate the cooling speed, and reduce thermal deformation and residual stress accumulation. In addition, since the air flow passes through the gap between the fixed table 2 and the baffle 3, the air pressure in the gap between the fixed table 2 and the baffle 3 is reduced, and the argon gas discharged downward during the welding process of the argon arc welding machine 106 can be driven downward by the air flow through the gap between the fixed table 2 and the baffle 3, thereby effectively utilizing the discharged argon gas to reduce the oxygen content of the cooling air flow.

[0020] Example 2: See also Figure 1-5 Based on the first embodiment, a technical solution is provided: the resistance detection mechanism 105 includes an electric telescopic rod 501, one end of the electric telescopic rod 501 is hinged to the outer wall of the sliding frame 104, the other end of the electric telescopic rod 501 is hinged to an articulated arm 502, the rear end of the articulated arm 502 is hinged to the outer wall of the sliding frame 104, the middle part of the articulated arm 502 is hinged to the front end of the electric telescopic rod 501, the front end of the articulated 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 the left side and the right side of the sliding frame 104, the two copper contacts 503 are electrically connected to the resistance detection module 504, and the upper side of the copper contact 503 is lower than the lower side of the argon arc welding machine 106; When the present device is welding the chain link, as the sliding frame 104 moves downward, the lower side of the copper contact 503 will first contact the upper surface of the chain link. At this time, discharge is performed through the resistance detection module 504, so that the current forms a path through the left copper contact 503 to the chain link to the right copper contact 503, thereby enabling the resistance detection module 504 to monitor the resistance of the chain link. Subsequently, 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 according to the resistance of the chain link, and then start the electric telescopic rod 501 to drive the articulated arm 502 to lift up the copper contact 503 to separate from the surface of the chain link, thereby preventing the copper contact 503 from contacting the high-temperature chain link during the welding process. When the welding is completed and the sliding frame 104 is reset, the electric telescopic rod 501 contracts and drives the articulated arm 502 to reset, thereby avoiding cold welding due to insufficient power or burn-through due to excessive power.

[0021] Example 3: See also Figure 1-6On the basis of the first and second embodiments, a technical solution is provided: the identification mechanism 12 includes a fixed component and a visual recognition module 202, the visual recognition module 202 is used to identify the chain break distance and the chain buckle break height, the fixed component includes a fixed plate 201, the inner wall of the fixed 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 fixed platform 2, the outer wall of the fixed plate 201 is located below the visual recognition module 202 and is fixedly connected to a third motor 203, the outer wall of the third motor 203 is fixedly connected to a fixed frame 204, the inner wall of the fixed frame 204 is fixedly connected to a baffle 205, and the fixed frame 204 is made of rubber; 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 visual recognition module 202, and then detects the distance between the inner walls on both sides of the chain link break through the visual recognition module 202, and calculates the chain link height at the same time. Then, 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 visual recognition module 202. At this time, the control module detects the chain link height through the visual recognition module 202 to dynamically adjust the descending height of the sliding frame 104, and adjusts the rotation angle of the rubber wheel 109 driven by the second motor 107 through the value of the distance between the inner walls on both sides of the chain link break detected by the visual recognition module 202, thereby adjusting the wire feeding amount to avoid excessive or insufficient wire feeding.

[0022] Example 4: See also Figure 1-6 Based on the first, second, and third embodiments, a technical solution is provided: the visual recognition module 202 obtains the size and opening position of the chain link, and the copper contact 503 and the resistance detection module 504 obtain the material resistance of the chain link on the upper side of the fixed platform 2 at this time. Then, the control module performs a joint matching adjustment on the power, descent depth, and wire feed rate of the argon arc welder 106, thereby realizing adaptive welding parameter control for each chain; Among them, the chain link resistance can be detected by voltage and current sampling according to Ohm's law; in: is the chain link resistance, is the voltage between the two copper contacts 503 and the contact point of the chain link, is the current passing through the chain link; The control module dynamically adjusts the welding power according to the resistance of the chain link: or in is the welding power; The welding gun lowering height is adjusted according to the height of the chain link detected by the visual recognition module 202: in Lower the height of the argon arc welding machine 106, is the preset reference height, The visual recognition module 202 detects the height of the upper surface of the cuff link; And the control module calculates the wire feeding length according to the fracture width: in is the wire feeding length, is the fracture spacing, is the wire feeding compensation coefficient; The estimation formula for the wire melting speed of synchronous wire feeding is: in is the melting speed of the welding wire, is the welding current, is the arc thermal efficiency, is the density of the welding wire material, is the cross-sectional area of the welding wire, The latent heat of melting of welding wire.

[0023] A control method for an automatic arc welding machine for chain welding, based on the above-mentioned automatic arc welding machine for chain welding, includes the following five steps: Step 1: Use the traction device to drive the chain to move, and the rotation angle detection module 5 detects the position of the chain link. When it is detected that the chain link moves to the top of the fixed platform 2, the chain movement is stopped; Step 2: The hydraulic rod 7 is activated to drive the push block 8 upward, and the symmetrically arranged clamping rods 10 clamp the chain link and position it so that the broken end of the chain link faces upward. After clamping, it is lowered and reset. The visual recognition module 202 collects the distance and height between the two sides of the broken end of the chain link and transmits the recognition results to the control module; Step 3: The first motor 101 drives the threaded rod 102 to rotate, causing the slide 104 to move vertically downward. The downward movement of the slide 104 is controlled according to the recognition result so that the argon arc welder 106 approaches and aligns with the welding surface of the chain link; Step 4: As the slide 104 moves downward, the left and right copper contacts 503 contact the surface of the chain link, forming a resistance detection circuit. The resistance detection module 504 obtains the chain link resistance value and uploads it to the control module. The control module automatically adjusts the welding current power and welding time based on 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 the welding wire and guide the welding wire into the chain buckle fracture area through the fixed tube 108, and at the same time control the argon arc welding machine 106 to perform the argon arc welding operation. After the welding is completed, the wire feeding and welding are stopped, the first motor 101 is reversed to reset the sliding frame 104, and the chain continues to run. At the same time, the air duct 6 sprays cooling air along the chain surface to remove the welding heat.

[0024] The present invention provides an automatic arc welding machine for chain welding and a control method thereof. The chain is conveyed to the top of the fixed table 2 through the gear 4 and the traction device. The rotation angle detection module 5 detects the chain position in real time to ensure that the chain link is accurately stopped. The hydraulic rod 7, the push block 8, and the limit sleeve 9 are activated to clamp the broken surface of the chain link and flip it to a vertical position to ensure that the welding surface is accurately positioned. The visual recognition module 202 accurately detects the distance and height between the inner walls on both sides of the chain link fracture. The control module adjusts the descent height and wire feed length of the argon arc welder 106 accordingly to ensure that the welding parameters match the chain link size. During the descent of the welding mechanism, the resistance detection mechanism 105 contacts the surface of the chain link and dynamically measures the chain link resistance. The control module adjusts the welding power and time according to the resistance value to achieve precise control of the welding current. After welding is completed, the air duct 6 quickly removes the heat from the weld by ejecting air above the baffle 3, reducing thermal deformation and residual stress. The overall process is coordinated to ensure stable and reliable welding quality, adapt to the physical differences of different chain links, and improve production efficiency and automation level.

[0025] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0026] 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 aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or substitute equivalents for some of the technical features. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection 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 panels (1), a groove extending through the front and rear is provided 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 to the side walls of the side panels (1), and the lower ends of the two baffles (3) are rotatably connected to gears (4) through bearings, and 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; A hydraulic rod (7) and a push block (8) are provided on the side wall of the side plate (1), and a limiting sleeve (9) is fixedly connected to the side wall of the side plate (1) at the front side of the push block (8) and the rear side of the push block (8), and 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 direction of the chain buckle break; A welding mechanism (11) is further provided on the rear side of one of the side panels (1), and an identification mechanism (12) is provided on the front side of the other side panel (1); The welding mechanism (11) comprises a moving component and an argon arc welder (106) on the moving component, and the argon arc welder (106) is used to weld the fracture surface of the chain buckle; The identification mechanism (12) comprises a fixed component and a visual identification module (202), wherein the visual identification module (202) is used to identify the chain break distance and the chain buckle break height.

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) are in contact with 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, it can drive the upper ends of the two clamping rods (10) to close inward and position the broken end of the chain buckle upward at the welding position.

3. The automatic arc welding machine for chain welding according to claim 2, characterized in that: The fixed platform (2) is a trapezoid with a flat upper side, inclined sides, and a front and rear 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 gears (4) on the lower sides of the two baffles (3). The outer wall of the fixed platform (2) does not contact the outer wall of the baffle (3).

4. The 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 an air duct (6), and the air duct (6) is located on the upper left side of the right baffle (3), with the output end of the air duct (6) facing downward.

5. The automatic arc welding machine for chain welding according to claim 4, characterized in that: The moving assembly comprises a first motor (101), an outer wall of the first motor (101) is fixedly connected to the rear side of the side plate (1), an output end of the first motor (101) is fixedly connected to a threaded rod (102), an outer wall of the threaded rod (102) is threadedly connected to a threaded sleeve (103), an outer wall of the threaded sleeve (103) is fixedly connected to a sliding frame (104), one side of the sliding frame (104) is slidably connected to the rear side of the outer wall of the side plate (1), and a resistance detection mechanism (105) is provided on the side wall of the sliding frame (104). The argon arc welding machine (106) is arranged 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), the sliding frame (104) is also fixedly connected to the upper side of the argon arc welding machine (106) with a fixed pipe (108), the output end of the second motor (107) is fixedly connected to a rubber wheel (109), and one side of the rubber wheel (109) is located inside the fixed pipe (108).

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

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

8. The automatic arc welding machine for chain welding according to claim 7, characterized in that: Copper contacts (503) are provided on the left side of the sliding frame (104) and the right side 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. The automatic arc welding machine for chain welding according to claim 8, characterized in that: The fixing assembly comprises 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); the outer wall of the fixing plate (201) is fixedly connected to a third motor (203) at the lower side of the visual recognition module (202); the outer wall of the third motor (203) is fixedly connected to a fixing frame (204); the inner wall of the fixing frame (204) is fixedly connected to a blocking piece (205); and 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 to 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 link, and stop the chain movement when it is detected that the chain link moves to the top of the fixed platform (2); Step 2: Start the hydraulic rod (7) to drive the push block (8) to rise, clamp the chain link through the symmetrically arranged clamping rods (10) so that the chain link break faces upward, and then lower it to reset after clamping is completed. The visual recognition module (202) collects the distance and height between the two sides of the chain link break 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, and the downward movement of the sliding frame (104) is controlled according to the recognition result so that the argon arc welding machine (106) approaches and aligns with the chain link welding surface; Step 4: When the sliding frame (104) moves downward, the left and right copper contacts (503) contact the surface of the chain buckle and form a resistance detection circuit. The resistance detection module (504) obtains the resistance value of the chain buckle 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 lifts the copper contact (503) to avoid the high-temperature welding area. 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 fracture area through the fixed tube (108), and at the same time control the argon arc welding machine (106) to perform the argon arc welding operation. After the welding is completed, the wire feeding and welding are stopped, the first motor (101) is reversed to reset the sliding frame (104), and the chain continues to run. At the same time, the air duct (6) sprays cooling air along the surface of the chain to remove the welding heat.

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