A gantry production resistance welding device

Abstract

The application discloses a resistance welding equipment for gantry production, which comprises a workbench, a rack, a placing rack, a conveying mechanism, symmetrically arranged cross beams, multiple groups of welding guns, a lifting mechanism and an operation panel. The welding guns are slidably connected to the cross beams through connecting assemblies. The connecting assemblies comprise connecting seats, connecting plates, mounting seats, conductive plates and locking pieces. The locking pieces are provided with handles with screw rods and connecting blocks one and two which are connected through fasteners and form adjusting gaps. Turning the handle can drive the connecting blocks to clamp or loosen the cross beams through the connecting plates, so as to realize the rapid manual adjustment and locking of the transverse position of the welding guns. The equipment is also provided with a calibration assembly which can automatically calibrate the positions of the symmetrically arranged welding guns. Through the connecting assemblies and the calibration assembly, the operation process of the position adjustment of the multiple welding guns is significantly simplified, the adjustment efficiency and the alignment accuracy are greatly improved, and the problems of complicated and low-efficiency production change debugging of the traditional equipment are effectively solved.

Description

Technical Field

[0001] This invention relates to the field of welding equipment technology, and more specifically, to a resistance welding device for gantry crane production. Background Technology

[0002] Resistance welding equipment for gantry crane production is a type of mechanical equipment specifically designed for spot welding of thin metal sheets. It combines the stability of the gantry crane structure with the high efficiency of spot welding technology and is widely used in various fields such as automobile manufacturing, home appliance production, and metal structural parts processing. Its working principle is based on resistance welding technology. Pressure is applied to the workpiece through electrodes, and the resistance heat generated by the current passing through the contact surface and adjacent areas of the workpiece is used to melt or plasticize the workpiece, thereby forming a weld point.

[0003] The fixed gantry welding machine is a type of resistance welding equipment used in gantry production. Its principle is to place the workpiece on a movable placement rack, then move the placement rack to adjust the position of the workpiece, ensuring that the starting point of the weld to be welded is roughly aligned with the initial position of the welding torch. Then, a preset program is used to drive the workpiece to move under the welding torch for welding.

[0004] The welding torch of a conventional fixed gantry welding machine is usually indirectly connected through a slide mechanism. The welding torch and its mounting base are fixed on the slide, which is mounted on the crossbeam of the gantry. Driven by a servo motor or manually, the slide can move the welding torch left and right (X-axis) along the crossbeam of the gantry.

[0005] Currently, when using a fixed gantry welding machine to process workpieces of different specifications, it is usually necessary to adjust the initial position of the welding torch to ensure that it corresponds to the starting point of the weld seam on the workpiece. Therefore, the operator needs to manually loosen the slide plate, then adjust the position of the slide plate and thus adjust the position of the welding torch. After the adjustment is completed, the slide plate is tightened. However, there are multiple welding torches on a fixed gantry welding machine, and it is inconvenient to tighten and loosen the fasteners when the slide plate carrying the welding torch is installed on the crossbeam. Therefore, a new solution is needed to solve this problem. Summary of the Invention

[0006] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a resistance welding equipment for gantry frame production, so as to solve the defects existing in the above-mentioned background technology.

[0007] The above-mentioned technical objective of the present invention is achieved through the following technical solution: a resistance welding device for gantry crane production, comprising: A workbench on which the gantry frame body is mounted; The frame is set on the workbench; A placement rack, slidably connected to the machine frame, is used to place workpieces; A conveying mechanism, mounted on the frame, is used to control the movement of the placement rack along the frame. Two sets of crossbeams are provided and symmetrically arranged on both sides of the frame and connected to the gantry frame body; Multiple welding torches are provided and are slidably connected to the crossbeam via connecting components; The lifting mechanism, mounted on the connecting assembly, is used to control the raising and lowering of the welding torch; The control panel, with its built-in operating system, is set on the workbench to control the start and stop of the conveying and lifting mechanisms. The connecting assembly includes a connecting seat, a connecting plate, a mounting base, a conductive plate, and a locking component. The connecting seat and the connecting plate are symmetrically arranged on both sides of the crossbeam. The welding torch is mounted on the side of the mounting base away from the connecting seat. One end of the conductive plate is connected to the side of the connecting plate away from the connecting seat, and the other end is connected to the side wall of the welding torch. A curved portion is formed on the conductive plate. The locking component includes a handle and a connecting block one and a connecting block two arranged on both sides of the connecting seat. The connecting block one and the connecting block two are connected by fasteners, and both have an adjustment gap with the connecting seat. The fasteners penetrate the connecting seat to restrict the rotation of the connecting block one and the connecting block two. A threaded hole is opened on the connecting block one. A screw threaded into the threaded hole is fixedly connected to the handle. The end of the screw away from the handle is rotatably connected to the connecting seat. The side of the connecting block two away from the connecting seat is fixedly connected to the side of the connecting plate facing the connecting seat.

[0008] The present invention is further configured such that: both sides of the crossbeam are provided with slide rails, and the crossbeam is provided with sliding grooves that match the slide rails; the connecting block 2 is slidably connected to the slide rails and the sliding grooves.

[0009] The present invention is further configured such that: the lifting mechanism includes a cylinder 1 mounted on the connecting seat and controlled by the operating system, the output end of the cylinder 1 passing through the connecting seat and connected to the side of the mounting seat away from the welding torch.

[0010] The invention is further configured to include a calibration component, which comprises an infrared transmitter mounted on an upper connecting seat, an infrared receiver mounted on a lower connecting seat, and several servo motors mounted on a lower crossbeam. The infrared transmitter, infrared receiver, and servo motors are all connected to the operating system. A connecting rod is fixedly connected to the output end of each servo motor. An adjusting seat is fixedly connected to the lower cylinder, and a threaded rod is threadedly connected to the adjusting seat. The connecting rod and the threaded rod are connected through a gear set. When the infrared receiver does not receive a signal transmitted by the infrared transmitter, the servo motor starts and drives the connecting seat to move axially along the threaded rod through the connecting rod, the threaded rod, and the gear set. When the infrared receiver receives a signal transmitted by the infrared transmitter, the servo motor shuts down.

[0011] The present invention is further configured such that: the placement frame includes a placement frame slidably connected to the machine frame and two guide rails disposed on the placement frame; a plurality of positioning blocks are slidably connected on the guide rails; a support rod is fixedly connected between two mutually symmetrical positioning blocks on the two guide rails; a plurality of positioning grooves are provided on the support rods for placing workpieces; the plurality of positioning grooves are all staggered from the welding points on the workpieces; limit rods are fixedly connected to the side walls of the support rods located on both sides of the placement frame; the limit rods are provided with limit grooves for workpieces to be inserted; a plurality of positioning holes are provided on the guide rails; and screw holes are provided on the positioning blocks; a positioning rod for insertion into the positioning hole is threaded into the screw hole.

[0012] The present invention is further configured such that: the conveying mechanism includes a dual-head motor mounted on the frame and controlled by the operating system, a drive rod rotatably connected to the frame, a slide groove opened on the frame, and a slider slidably connected in the slide groove. The slider is threadedly connected to the drive rod, and the slider is fixedly connected to the bottom of the placement frame. The output ends of the dual-head motor are all fixedly connected to connecting rods, and the connecting rods are connected to the drive rods through a transmission assembly.

[0013] The present invention is further configured such that: two cylinders controlled by the operating system are provided on both sides of the frame, and the two cylinders are connected by a drive plate; another set of conveying mechanisms is provided on the frame to drive the drive plate to move; the output end of the cylinder is fixedly connected to a plate, and the plate is located below the workpiece placed on the placement rack.

[0014] The present invention is further configured such that the operating system includes: The parameter setting module is used to set welding parameters, the moving speed and stroke of the conveying mechanism, and the stroke and action sequence of the lifting mechanism; The process control module is used to automatically or semi-automatically coordinate and control the collaborative work of the conveying mechanism, lifting mechanism and welding torch according to the preset welding process. The calibration control module is communicatively connected to the calibration component and is used to receive signals from the infrared transmitter and infrared receiver, and control the start, stop and rotation of the servo motor to achieve automatic calibration of the welding torch position. The real-time monitoring module is used to display the equipment's operating status, the current position of each mechanism, welding parameters, and alarm information on the operation panel's display interface in real time. The fault diagnosis module has built-in common fault handling logic. When abnormal equipment operation is detected, it will issue an alarm and display possible fault causes and handling suggestions on the operation panel. The data management module is used to store welding process parameters, production records, equipment operation logs, and supports querying and exporting historical data.

[0015] The present invention is further configured such that: the operating system also integrates a safety protection module, which is electrically connected to the second cylinder, the dual-head motor, the first cylinder, and the welding torch power supply; when an emergency stop is triggered or the system detects operational interference or parameter over-limit, the safety protection module controls the conveying mechanism and the lifting mechanism to stop immediately, cuts off the welding torch power supply, and simultaneously starts the second cylinder to push the plate upward to support the workpiece.

[0016] The present invention is further configured such that: the operation panel is a touch screen; the interface provided by the parameter setting module allows users to directly input or select welding current, voltage, time, welding torch pressure, as well as the moving speed and stopping position of the placement rack; the process control module allows users to edit and store processing programs containing multiple weld point coordinates and welding parameters.

[0017] In summary, the present invention has the following beneficial effects: 1. Operators only need to rotate a single handle to quickly unlock, slide, and lock the welding torch and connecting seat on the crossbeam, eliminating the need for tedious repeated loosening and tightening operations. This significantly simplifies the operation steps, making the initial position adjustment of multiple welding torches easy and quick, and greatly improving the work efficiency of adjusting the welding torch position. Second, it integrates a calibration component driven by an infrared transmitter, an infrared receiver, and a servo motor. After adjusting the position of the welding torch on one side, it can automatically drive the corresponding welding torch on the other side to move until precise alignment is achieved. This replaces the unreliable method of relying on manual visual inspection and measurement for symmetrical calibration, ensuring the symmetry of the welding points on both sides of the workpiece and the welding quality, while further reducing manual intervention and adjustment time. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 This indicates the overall external structure of the welding equipment; Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 This indicates the overall external structure of the welding equipment; Figure 3 This is a schematic diagram of the structure of the present invention. Figure 3 This demonstrates the external structure of the gantry frame body, welding torch, and connecting components; Figure 4 This is a schematic diagram of the structure of the present invention. Figure 4 This demonstrates the external structure of the welding torch and calibration components; Figure 5 for Figure 1 The enlarged view at point A in the image shows the external structure of the placement frame.

[0019] In the diagram: 1. Workbench; 2. Gantry frame body; 3. Frame; 4. Crossbeam; 5. Welding torch; 6. Control panel; 7. Connecting seat; 8. Connecting plate; 9. Mounting seat; 10. Conductive plate; 11. Handle; 12. Connecting block one; 13. Connecting block two; 14. Fastener; 15. Adjusting clearance; 16. Screw; 17. Slide rail; 18. Sliding groove; 19. Cylinder one; 20. Infrared transmitter; 21. Infrared receiver; 22. Servo motor 23. Connecting rod; 24. Gear set; 25. Threaded rod; 26. Placement frame; 27. Guide rail; 28. Positioning block; 29. ​​Support rod; 30. Positioning groove; 31. Limiting rod; 32. Limiting groove; 33. Positioning hole; 34. Positioning rod; 35. Dual-head motor; 36. Drive rod; 37. Slide groove; 38. Slider; 39. Connecting rod; 40. Transmission group; 41. Cylinder II; 42. Plate; 43. Adjusting seat; 44. Drive plate. Detailed Implementation

[0020] To enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of this application can be combined with each other.

[0021] In the description of this invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0022] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0023] A resistance welding equipment for gantry crane production, such as Figures 1-5 As shown, the workbench 1 serves as the mounting base for all components. The gantry frame body 2 is fixedly installed on the workbench 1, forming a stable gantry structure. Below the gantry frame body 2, a frame 3 is installed on the workbench 1. The frame 3 extends along the span direction of the gantry frame body 2 and is used to support and guide the conveying of workpieces. The placement frame is slidably connected to the machine frame 3. Specifically, it comprises a rectangular placement frame 26. The bottom of the placement frame 26 slides through a slider 38 that engages with a groove 37 on the machine frame 3. Two parallel guide rails 27 are arranged on the placement frame 26. Multiple positioning blocks 28 are slidably fitted onto each guide rail 27. A support rod 29 is fixedly connected between corresponding two positioning blocks 28. Several positioning grooves 30 are formed on the upper surface of the support rod 29 to support the edges of the workpiece. The positions of all positioning grooves 30 are designed to align with the workpiece. The predetermined welding points are staggered to prevent interference during welding. Vertical limiting rods 31 are fixedly connected to the two outermost support rods 29. Limiting rods 31 have limiting grooves 32, into which the end of the workpiece can be inserted to achieve longitudinal limiting. To accommodate workpieces of different sizes, positioning holes 33 are arranged in an array along the length of the guide rail 27. Screw holes are opened on the positioning block 28. By screwing in the positioning rod 34 so that its end is inserted into the selected positioning hole 33, the positioning block 28 and the support rod 29 connected thereto can be locked in the required position. Conveying mechanism: used to drive the placement rack to move precisely along the frame 3. It includes a double-headed motor 35 installed at the end of the frame 3. The two output shafts of the double-headed motor 35 are each connected to a connecting rod 39 through a coupling. At least one drive rod 36 is rotatably installed inside the frame 3 parallel to the slide groove 37. The ends of the connecting rod 39 and the drive rod 36 are connected to the transmission group 40 to achieve power transmission. A slider 38 is threaded on the drive rod 36. The slider 38 is also embedded in the slide groove 37 of the frame 3 to prevent it from rotating. The top of the slider 38 is fixedly connected to the bottom of the placement frame 26. Therefore, when the double-headed motor 35 rotates in both directions, it can drive the drive rod 36 to rotate through the connecting rod 39 and the transmission group 40, thereby driving the slider 38 and the entire placement rack to move linearly along the frame 3. Crossbeam 4: There are two sets, which are symmetrically fixed to the inner side of the two columns of the gantry frame body 2. Each crossbeam 4 has a slide rail 17 on its side wall and a corresponding sliding groove 18.

[0024] Connecting assembly and welding torch 5: Multiple welding torches 5 are mounted on the crossbeam 4 via a connecting assembly. The connecting assembly is key to enabling convenient adjustment of the welding torches 5 in this invention, and includes: Connecting seat 7: It is the main load-bearing body and straddles the crossbeam 4; Connecting plate 8: symmetrically located on both sides of connecting seat 7, with its inner side opposite to the side of crossbeam 4; Locking component: Used for quickly locking or loosening the connecting seat 7 and the crossbeam 4. It includes a handle 11 with a screw 16 fixed to it. Connecting block 12 and connecting block 2 13 are respectively provided on the outer side walls of the connecting seat 7. Connecting block 12 has a threaded hole that mates with the screw 16. The end of the screw 16 is rotatably connected inside the connecting seat 7. Connecting block 12 and connecting block 2 13 are connected by a fastener 14. The fastener 14 passes through an elongated hole or groove on the connecting seat 7, creating an adjustment gap 15 between connecting block 12, connecting block 2 13 and the side wall of the connecting seat 7. The fastener 14 serves as a guide and prevents rotation. Connecting block 2 13 is located away from the side wall of the connecting seat 7. The side of the connecting plate 8 facing the connecting seat 7 is fixedly connected, and the bottom extension of the connecting block 2 13 is slidably embedded in the slide rail 17 and sliding groove 18 of the crossbeam 4, which not only ensures smooth sliding but also improves load-bearing stability. When the handle 11 is rotated clockwise, the screw 16 is screwed into the connecting block 12. Due to the restriction of the fastener 14, the connecting block 12 drives the connecting block 2 13 to tighten towards the center of the connecting seat 7, thereby pulling the connecting plates 8 on both sides to tightly clamp the crossbeam 4 and achieve locking. Rotating counterclockwise will loosen the connecting plate 8. At this time, the entire connecting assembly can be easily slid along the crossbeam 4 to adjust the lateral position of the welding gun 5. Mounting base 9 and conductive plate 10: Mounting base 9 is located outside the connecting base 7 and is used to mount the welding gun 5. One end of the conductive plate 10 is connected to the connecting plate 8 and the other end is connected to the side wall of the mounting base 9. It is responsible for conducting the welding current from the power source to the welding gun 5. The conductive plate 10 is provided with a bending part to provide elastic deformation space and avoid damage from force when adjusting the position. Lifting mechanism: used to drive the vertical movement of welding torch 5. In this embodiment, cylinder 19 is used. The cylinder body of cylinder 19 is fixed on the top of connecting seat 7. Its piston rod passes down through connecting seat 7 and connects to the back of mounting seat 9. By controlling the extension and retraction of cylinder 19, the welding torch 5 can be pressed down and lifted.

[0025] Operation panel 6: Usually a color touch screen, set in an easily accessible position on the workbench 1, and runs an integrated operating system inside; Operating system: Includes multiple functional modules: Parameter setting module: Provides a graphical interface, allowing users to directly input or select welding current, voltage, time, welding torch pressure, as well as the moving speed of the placement rack and its stopping position at each welding point, etc. Process control module: Allows users to edit, save, and recall processing programs. A program can contain multiple sequential steps, each defining the weld point coordinates, welding parameters, and the timing of the welding torch's actions. Calibration control module: Manages the control logic related to calibration components; Real-time monitoring module: Dynamically displays device status, coordinates, parameters, and alarm information on the touch screen; Fault diagnosis and safety protection module: Monitors system operation, and stops the equipment and issues a warning when an abnormality is detected; Data management module: Stores all programs and running records.

[0026] Calibration component: used for automatic alignment of the two symmetrical welding torches 5, an infrared transmitter 20 is installed on the upper connecting seat 7, an infrared receiver 21 is installed on the corresponding lower connecting seat 7, a servo motor 22 is installed on the lower crossbeam 4, its output shaft is connected to the connecting rod 23, an adjusting seat 43 is fixedly connected to the lower cylinder 19, and a threaded rod 25 is threadedly connected to the adjusting seat 43. The connecting rod 23 and the threaded rod 25 are driven by a gear set 24. The infrared transmitter 20, infrared receiver 21 and servo motor 22 are all connected to the calibration control module of the operating system. Additionally, on both sides of the frame 3, below the placement rack, there is a second cylinder 41. The piston rod of the second cylinder 41 points upward, and the end is fixed with a plate 42. Under normal circumstances, the plate 42 is in a low position. This device is controlled by the safety protection module and is used to support the workpiece in an emergency. In addition, the setting of the drive plate 44 can drive the second cylinders 41 on both sides to move together under the drive of the conveying mechanism, ensuring that the plate 42 can support the workpiece in time in an emergency.

[0027] Taking the welding of a metal box-shaped workpiece with multiple symmetrical weld points as an example, the working process of the present invention is described as follows: Step 1: Workpiece clamping and placement rack adjustment According to the dimensions of the workpiece drawing, the operator loosens the positioning rod 34, slides each positioning block 28 to match the spacing between all support rods 29 with the workpiece support point, and after adjustment, tightens the positioning rod 34 to fix it. The workpiece is then placed in the placement rack so that its edge falls into the positioning groove 30 of the support rod 29 and its end is inserted into the limiting groove 32 of the limiting rod 31, thus completing the quick positioning and clamping.

[0028] Step 2: Initial position adjustment of welding torch 5 and program preparation On the touchscreen, users can create or select a machining program template for a new workpiece through the parameter setting module. Manual coarse adjustment: Observe the approximate position of the first weld point on the workpiece. If it is necessary to adjust the lateral starting position of the welding torch 5, the operator only needs to rotate the handle 11 on the connecting component corresponding to the target welding torch 5 counterclockwise until it feels loose. At this time, the pressure between the connecting plate 8 and the crossbeam 4 is released. The entire connecting component and the welding torch 5 on it can be easily pushed by hand to slide along the crossbeam 4 to near the estimated weld point. Rotate the handle 11 clockwise to re-lock and fix it. This adjustment process only takes a few seconds for a single welding torch 5, which is much faster than the traditional tool tightening method. Automatic fine calibration: After the position of the welding torch 5 on one side is adjusted, the "calibration" function is activated on the touch screen. The calibration control module activates the infrared transmitter 20 to send a signal. If the infrared receiver 21 below does not receive the signal, the module immediately starts the servo motor 22. The servo motor 22 drives the threaded rod 25 to rotate through the connecting rod 23 and the gear set 24. Since the threaded rod 25 and the connecting seat 7 below are threadedly engaged, and the connecting seat 7 is restricted from rotating, the connecting seat 7 drives the welding torch 5 and the infrared receiver 21 on it to start moving laterally. Once the infrared receiver 21 moves to a position where it can receive the signal from the infrared transmitter 20, the calibration control module immediately stops the servo motor 22. At this time, the upper and lower sets of welding torches 5 achieve precise lateral position alignment. Then repeat the manual coarse adjustment and automatic fine calibration steps to adjust and calibrate the positions of other welding guns 5. In the programming interface of the process control module, combine the workpiece drawing and the adjusted position of welding gun 5 to accurately set or correct the coordinates of each welding point and the corresponding welding parameters in the processing program. After completion, name and save this complete program.

[0029] Step 3: Execution of automated welding The operator places the workpiece on the adjusted placement rack, selects the corresponding stored processing program on the touch screen, and clicks "Start". The process control module first coordinates the reset of each mechanism to the program start point. Welding cycle begins: The process control module commands the dual-head motor 35 of the conveyor mechanism to start, which drives the placement frame carrying the workpiece to move precisely to the position set in the first welding point program via the transmission group 40 and drive rod 36, and then stops. At the same time, the process control module commands the lifting mechanism of the corresponding welding torch 5 to move, pushing the welding torch 5 downward to press the workpiece with the set pressure. The welding machine power is turned on, and discharge welding is performed according to the current, voltage and time set by the parameter setting module. After welding is completed, the welding torch 5 is lifted, and the conveyor mechanism drives the placement frame to move to the next welding point position. The welding steps are repeated until all welding points are completed. The real-time monitoring module continuously updates the status information throughout the process.

[0030] Step 4: Workpiece unloading and safety protection After welding is completed, the conveyor will return the placement rack to the loading / unloading station. The operator will remove the finished workpiece. If the workpiece specifications remain unchanged, a new workpiece of the same specifications will be placed in the rack, and the next cycle can begin. If the emergency stop button is triggered during welding or the safety protection module detects an abnormality, the module will immediately: a) cut off the power to the welding torch 5; b) stop the dual-head motor 35 and all cylinders 19; c) simultaneously start the cylinders 41 on both sides, causing the plate 42 to rise rapidly and support the workpiece from below, preventing it from falling or shifting accidentally, and ensuring the safety of the equipment and the workpiece. If the working specifications change, the above actions will be repeated after resetting all components through the operating system.

[0031] As can be seen from the above specific implementation methods, the use of automated calibration and programmed control has enabled efficient, precise, and flexible production of gantry resistance welding equipment.

[0032] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A resistance welding equipment for gantry crane production, characterized in that, include: A workbench on which the gantry frame body is mounted; The frame is set on the workbench; A placement rack, slidably connected to the machine frame, is used to place workpieces; A conveying mechanism, mounted on the frame, is used to control the movement of the placement rack along the frame. Two sets of crossbeams are provided and symmetrically arranged on both sides of the frame and connected to the gantry frame body; Multiple welding torches are provided and are slidably connected to the crossbeam via connecting components; The lifting mechanism, mounted on the connecting assembly, is used to control the raising and lowering of the welding torch; The control panel, with its built-in operating system, is set on the workbench to control the start and stop of the conveying and lifting mechanisms. The connecting assembly includes a connecting seat, a connecting plate, a mounting base, a conductive plate, and a locking component. The connecting seat and the connecting plate are symmetrically arranged on both sides of the crossbeam. The welding torch is mounted on the side of the mounting base away from the connecting seat. One end of the conductive plate is connected to the side of the connecting plate away from the connecting seat, and the other end is connected to the side wall of the welding torch. A curved portion is formed on the conductive plate. The locking component includes a handle and a connecting block one and a connecting block two arranged on both sides of the connecting seat. The connecting block one and the connecting block two are connected by fasteners, and both have an adjustment gap with the connecting seat. The fasteners penetrate the connecting seat to restrict the rotation of the connecting block one and the connecting block two. A threaded hole is opened on the connecting block one. A screw threaded into the threaded hole is fixedly connected to the handle. The end of the screw away from the handle is rotatably connected to the connecting seat. The side of the connecting block two away from the connecting seat is fixedly connected to the side of the connecting plate facing the connecting seat.

2. The resistance welding equipment for gantry crane production according to claim 1, characterized in that: Both sides of the crossbeam are provided with slide rails, and the crossbeam is provided with sliding grooves that match the slide rails. The connecting block 2 is slidably connected to the slide rails and sliding grooves.

3. The resistance welding equipment for gantry crane production according to claim 1, characterized in that: The lifting mechanism includes a cylinder 1 mounted on a connecting seat and controlled by an operating system. The output end of the cylinder 1 passes through the connecting seat and is connected to the side of the mounting seat away from the welding torch.

4. The resistance welding equipment for gantry crane production according to claim 3, characterized in that: It also includes a calibration component, which comprises an infrared transmitter mounted on the upper connecting seat, an infrared receiver mounted on the lower connecting seat, and several servo motors mounted on the lower crossbeam. The infrared transmitter, infrared receiver, and servo motors are all connected to the operating system. The output end of the servo motor is fixedly connected to a connecting rod. An adjusting seat is fixedly connected to the lower cylinder, and a threaded rod is threadedly connected to the adjusting seat. The connecting rod and the threaded rod are connected through a gear set. When the infrared receiver does not receive the signal transmitted by the infrared transmitter, the servo motor starts and drives the connecting seat to move axially along the threaded rod through the connecting rod, the threaded rod, and the gear set. When the infrared receiver receives the signal transmitted by the infrared transmitter, the servo motor shuts down.

5. The resistance welding equipment for gantry crane production according to claim 4, characterized in that: The placement frame includes a placement frame slidably connected to the machine frame and two guide rails set on the placement frame. Several positioning blocks are slidably connected to the guide rails. A support rod is fixedly connected between two symmetrical positioning blocks on the two guide rails. Several positioning grooves are opened on the support rods for placing workpieces. The positioning grooves are all staggered from the welding points on the workpieces. Limiting rods are fixedly connected to the side walls of the support rods located on both sides of the placement frame. Limiting rods are opened on the limiting rods for workpieces to be inserted. Several positioning holes are opened on the guide rails. Screw holes are opened on the positioning blocks. Positioning rods for insertion into the positioning holes are threaded into the screw holes.

6. The resistance welding equipment for gantry crane production according to claim 5, characterized in that: The conveying mechanism includes a dual-head motor mounted on the frame and controlled by the operating system, a drive rod rotatably connected to the frame, a slide groove opened on the frame, and a slider slidably connected in the slide groove. The slider is threadedly connected to the drive rod and fixedly connected to the bottom of the placement frame. The output ends of the dual-head motor are all fixedly connected to connecting rods, and the connecting rods are connected to the drive rods through a transmission assembly.

7. The resistance welding equipment for gantry crane production according to claim 6, characterized in that: Both sides of the frame are equipped with cylinders two controlled by the operating system. The two cylinders two are connected by a drive plate. Another set of conveying mechanisms is provided on the frame to drive the drive plate to move. The output end of the cylinder two is fixedly connected to a plate body, which is located below the workpiece placed on the placement rack.

8. The resistance welding equipment for gantry crane production according to claim 7, characterized in that: The operating system includes: The parameter setting module is used to set welding parameters, the moving speed and stroke of the conveying mechanism, and the stroke and action sequence of the lifting mechanism; The process control module is used to automatically or semi-automatically coordinate and control the collaborative work of the conveying mechanism, lifting mechanism and welding torch according to the preset welding process. The calibration control module is communicatively connected to the calibration component and is used to receive signals from the infrared transmitter and infrared receiver, and control the start, stop and rotation of the servo motor to achieve automatic calibration of the welding torch position. The real-time monitoring module is used to display the equipment's operating status, the current position of each mechanism, welding parameters, and alarm information on the operation panel's display interface in real time. The fault diagnosis module has built-in common fault handling logic. When abnormal equipment operation is detected, it will issue an alarm and display possible fault causes and handling suggestions on the operation panel. The data management module is used to store welding process parameters, production records, equipment operation logs, and supports querying and exporting historical data.

9. The resistance welding equipment for gantry crane production according to claim 8, characterized in that: The operating system also integrates a safety protection module, which is electrically connected to the second cylinder, the dual-head motor, the first cylinder, and the welding torch power supply. When an emergency stop is triggered or the system detects operational interference or parameter over-limit, the safety protection module controls the conveying mechanism and the lifting mechanism to stop immediately, cuts off the welding torch power supply, and simultaneously starts the second cylinder to push the plate upward to support the workpiece.

10. A resistance welding equipment for gantry crane production according to claim 8 or 9, characterized in that: The operation panel is a touch screen. The parameter setting module provides an interface that allows users to directly input or select welding current, voltage, time, welding torch pressure, as well as the moving speed and stopping position of the placement rack. The process control module allows users to edit and store processing programs containing multiple weld point coordinates and welding parameters.

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