Open arc welding carriage swing shaft adding mechanism

Abstract

The utility model relates to the technical field of welding devices, in particular to an open arc welding carriage swing shaft adding mechanism which comprises a movable carriage and a welding device, a swing device is arranged on a sliding table in a longitudinal moving assembly of the movable carriage and comprises a connecting frame, a lead screw, a rotating shaft and a connector, and the lead screw, the rotating shaft and the connector are arranged in the connecting frame. A plurality of cam grooves with different sizes are formed in the outer wall of the rotating shaft. According to the utility model, a plurality of cam grooves with different sizes are arranged on the rotating shaft and matched with a connector to be accurately embedded into or separated from the convex blocks of the selected cam grooves, so that a set of mechanical swing track library capable of being quickly switched is formed, hardware presetting and switching of swing amplitude and track are realized, complex programming or servo adjustment is not needed, and the operation is simple and convenient. The system is quick in response, high in anti-interference performance and particularly suitable for standardized and repeated welding tasks.

Description

Technical Field

[0001] This utility model relates to the field of welding equipment technology, and more specifically, to an added swing shaft mechanism for an open arc welding slide. Background Technology

[0002] Open arc welding is a common type of electric arc welding where the electric arc is clearly visible during welding and no specific gas shielding is required. It is typically done manually, offering high flexibility and is suitable for joining various metal materials, such as low-carbon steel. The equipment is simple and the cost is relatively low, but the weld quality is easily affected by operator skill and environmental factors. It is commonly used in general welding applications such as construction and maintenance.

[0003] Patent application number CN201611028523.2 discloses a single-gun multi-head open arc welding device and method. The flange is provided with welding gun fixing holes / grooves, and three welding guns are installed on the flange through the fixing holes / grooves. The three welding guns form the following two arrangement structures on the flange: the first arrangement structure is that the three welding guns are arranged in a straight line, and the second arrangement structure is that the line connecting the three welding guns forms an isosceles triangle. The three welding heads are located in the spatial triangle position, realizing the formation of a wide molten pool in one go, improving the welding quality and efficiency of thick plates.

[0004] However, the oscillation function of traditional open arc welding carriages is usually integrated into the horizontal movement drive system, relying on the same set of gear rack or lead screw mechanism to complete translation and oscillation simultaneously. Long-term high-frequency oscillation can easily lead to severe wear and increased clearance of transmission components, which in turn causes welding trajectory drift and decreased accuracy. At the same time, its oscillation amplitude mostly depends on servo motors and program control, making the system complex, slow in adjustment response, and lacking in adaptability and stability to repetitive welding conditions, making it difficult to balance high precision, long life and ease of operation.

[0005] In view of this, we propose to add a swing shaft mechanism to the open arc welding carriage. Utility Model Content

[0006] The purpose of this invention is to provide an added swing shaft mechanism for an open arc welding carriage. By opening several cam grooves of different sizes on the rotating shaft, and cooperating with the connector, the protrusions of the selected cam grooves can be precisely inserted into or disengaged, thereby realizing the hardware-based preset and switching of the swing amplitude and trajectory, so as to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] An open arc welding slide is equipped with a swing shaft mechanism, including a movable slide and a welding device. The slide table in the longitudinal movement component of the movable slide is provided with a swing device.

[0009] The swing device includes a connection frame, as well as a screw rod, a rotating shaft and a connector arranged inside the connection frame. A number of cam grooves with different sizes are provided on the outer wall of the rotating shaft;

[0010] The connector includes a slider for placing the welding device, a rotating tube rotating on the top surface of the slider, a screw rod sleeved in the rotating tube and threadedly connected to the slider, a dial rod arranged on the outer wall of the screw rod, a convex block sliding at the bottom end of the screw rod, and a spring sleeved outside the screw rod. A dial groove is provided on the outer wall of the rotating tube;

[0011] In the above setting, after the screw rod rotates, the position of the connector on the rotating shaft can be adjusted. After the rotating shaft rotates, it can drive the convex block to move along the track of the cam groove, and then带动 the connector and the screw rod to swing left and right;

[0012] After the rotating tube rotates, it拨动 the dial rod through the dial groove, drives the screw rod to rotate, and then adjusts the locking state of the convex block through the spring.

[0013] In the technical solution of the present utility model, the connection frame is fixedly connected to the outer wall of the sliding table in the longitudinal movement component of the mobile carriage through bolts. Square frames are welded on the outer walls of the left and right ends of the connection frame. A guide rail is fixedly connected between the two square frames on the outer wall of the connection frame through bolts.

[0014] The above setting clarifies the integration method of the swing device and the mobile carriage, realizes rigid connection and function bearing through the connection frame, and provides a stable basic framework and precise guiding structure for the installation and operation of the subsequent transverse movement and swing components.

[0015] In the technical solution of the present utility model, the swing device further includes a transverse movement part and a swing part. The transverse movement part includes a first motor and a bracket with a U-shaped cross-section sleeved outside the screw rod.

[0016] In the technical solution of the present utility model, the first motor is fixedly connected to the outer wall of the bracket through bolts. The screw rod is rotatably connected to the inside of the bracket. One end of the screw rod passes through the outer wall of the bracket and is coaxially connected to the output shaft of the first motor. The bracket is slidably connected to the guide rail on the outer wall of the connection frame.

[0017] The above setting constructs an accurate transverse positioning functional unit. By driving the screw rod with the first motor, the connector is带动 to move axially along the rotating shaft, realizing the initial position adjustment of the welding torch before swinging. And the entire transverse movement part can move synchronously along the guide rail to ensure stable operation.

[0018] In the technical solution of the present utility model, the swing part further includes a second motor. The second motor is fixedly connected to the outer wall of the direction frame at one end of the connection frame through bolts.

[0019] In the technical solution of this utility model, the left and right ends of the rotating shaft are respectively rotatably connected to the outer walls of the left and right directional frames of the connecting frame, and one end of the rotating shaft passes through the directional frame and is coaxially connected to the output shaft of the second motor.

[0020] The above configuration constitutes the core drive unit for the swing function. A second motor drives a rotating shaft with cam grooves of various sizes, providing the connector with multiple preset, mechanically reproduced swing trajectories, which form the power and trajectory basis for achieving different swing amplitudes.

[0021] In the technical solution of this utility model, the slider is threaded to the outside of the lead screw and slidably connected to the outside of the rotating shaft. The slider has a sliding hole inside that is adapted to the size of the rotating shaft and is open from left to right. The top surface of the slider has a lower through hole that is connected to the sliding hole.

[0022] In the technical solution of this utility model, the connector further includes a cover plate that is snapped and fixed to the top surface of the slider, and a drive motor that is fixed to the top surface of the internal partition of the cover plate by screws.

[0023] In the technical solution of this utility model, the top end of the rotating tube is coaxially connected to the output shaft of the drive motor, the screw is threadedly connected to the inside of the lower through hole, the bottom end of the screw is integrally formed with a sleeve, and the lever is snapped and fixed on the outer wall of the screw and its end extends to the outside of the lever groove.

[0024] In the technical solution of this utility model, the protrusion is slidably connected to the inside of the lower through hole, the end of the protrusion is adapted to the size of the cam groove, the top of the protrusion is integrally formed with a circular plate for limiting its sliding range, the center of the top surface of the protrusion is integrally formed with a central shaft that slides in the sleeve, the spring is sleeved on the outside of the sleeve, and the upper and lower ends of the spring abut against the bottom surface of the screw and the circular plate at the top of the protrusion, respectively.

[0025] The above setup controls the engagement and disengagement of the cam and different cam grooves on the rotating shaft by driving the motor, which enables the rapid and reliable selection and locking of the swing trajectory. It is the key actuator for the precise execution and flexible switching of the swing function.

[0026] Compared with the prior art, the beneficial effects of this utility model are:

[0027] 1. This open arc welding carriage incorporates a swing shaft mechanism, with the swing device independently mounted on the longitudinal slide table of the movable carriage. The swing function is achieved by a dedicated rotating shaft and cam groove, while the horizontal position adjustment is driven by an independent lead screw. This decouples the swing and translational motions, eliminating the oscillation action from the original gear and rack transmission mechanism of the carriage. On one hand, this significantly reduces the wear on gears and guide rails caused by long-term high-frequency oscillation in traditional carriages, thus significantly extending the service life of the entire equipment. On the other hand, since the swing trajectory is directly driven by a high-rigidity cam mechanism, the motion accuracy is high and the repeatability is good, effectively solving the problem of welding trajectory drift caused by transmission backlash. This is especially suitable for automated welding applications with high requirements for weld uniformity.

[0028] 2. This open arc welding carriage adds a swing shaft mechanism. Several cam grooves of different sizes are opened on the rotating shaft. With the help of the connector, the protrusions of the selected cam groove can be accurately inserted or disengaged, forming a mechanical swing trajectory library that can be quickly switched. It realizes the hardware preset and switching of swing amplitude and trajectory without relying on complex programming or servo adjustment. It has a fast response and strong anti-interference ability, and is particularly suitable for standardized and repetitive welding tasks. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0030] Figure 2 This is a side view of the overall structure of this utility model;

[0031] Figure 3 This is a schematic diagram of the swing device in this utility model;

[0032] Figure 4 This is a schematic diagram of the connecting frame in this utility model;

[0033] Figure 5 This is a schematic diagram of the transverse sliding part in this utility model;

[0034] Figure 6 This is a schematic diagram of the swinging part in this utility model;

[0035] Figure 7 This is a cross-sectional view of the connector structure in this utility model;

[0036] Figure 8 This is a cross-sectional view of the slider structure in this utility model;

[0037] Figure 9 This is a partial structural diagram of the connector in this utility model;

[0038] Figure 10 This is a partial structural disassembly diagram of the connector in this utility model;

[0039] Explanation of reference numerals in the attached figures:

[0040] 100. Movable carriage;

[0041] 200. Swinging device; 210. Connecting frame; 220. Lateral movement part; 221. First motor; 222. Lead screw; 223. Bracket; 230. Swinging part; 231. Second motor; 232. Rotating shaft; 2320. Cam groove; 240. Connector; 241. Slider; 2410. Sliding hole; 2411. Lower through hole; 242. Cover plate; 243. Drive motor; 244. Rotating tube; 2440. Slot; 245. Screw; 2450. Sleeve; 246. Lever; 247. Protrusion; 2470. Central shaft; 248. Spring;

[0042] 300. Welding equipment. Detailed Implementation

[0043] The technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0044] Please see Figures 1-4 As shown, this embodiment provides the following technical solution:

[0045] The open arc welding slide is equipped with a swing shaft mechanism, including a movable slide 100 and a welding device 300. The slide table in the longitudinal movement assembly of the movable slide 100 is provided with a swing device 200.

[0046] Specifically, the swing device 200 includes a connecting frame 210 and a lead screw 222, a rotating shaft 232 and a connector 240 disposed inside the connecting frame 210. The swing device 200 also includes a transverse part 220 and a swing part 230.

[0047] Furthermore, the connecting frame 210 is fixedly connected to the outer wall of the slide table in the longitudinal moving assembly of the movable slide 100 by bolts. Square frames are welded to the outer walls of both the left and right ends of the connecting frame 210, and guide rails are fixedly connected between the two square frames by bolts to the outer wall of the connecting frame 210.

[0048] Furthermore, the connecting frame 210 is used to fix the swing device 200 as a whole on the movable carriage 100, while providing a placement area for the lateral part 220 and the swing part 230.

[0049] The above settings clarify the integration method of the swinging device 200 and the moving carriage 100. Through the connection frame 210, a rigid connection and function bearing are achieved, providing a stable basic framework and an accurate guiding structure for the installation and operation of the subsequent transverse movement and swinging components.

[0050] Please refer to Figure 5 As shown, in this embodiment, the transverse movement part 220 includes a first motor 221 and a bracket 223 that is sleeved outside the lead screw 222 and has a U-shaped cross-section.

[0051] Specifically, the first motor 221 is fixedly connected to the outer wall of the bracket 223 by bolts. The lead screw 222 is rotatably connected inside the bracket 223. One end of the lead screw 222 passes through the outer wall of the bracket 223 and is coaxially connected to the output shaft of the first motor 221. The bracket 223 is slidably connected to the guide rail on the outer wall of the connection frame 210.

[0052] Furthermore, after the first motor 221 is started, it can drive the lead screw 222 to rotate. After the lead screw 222 rotates, the position of the connector 240 on the rotating shaft 232 can be adjusted. At the same time, when the connector 240 moves, it can带动 the entire transverse movement part 220 to move on the guide rail of the connection frame 210 through the bracket 223.

[0053] The above settings construct an accurate transverse positioning functional unit. By driving the lead screw 222 with the first motor 221, the connector 240 is带动 to move axially along the rotating shaft 232, realizing the initial position adjustment of the welding torch before swinging. And the entire transverse movement part 220 can move synchronously along the guide rail, ensuring stable operation.

[0054] Please refer to Figure 6 As shown, in this embodiment, the swinging part 230 further includes a second motor 231. The second motor 231 is fixedly connected to the outer wall of the frame body at one end of the connection frame 210 by bolts. A plurality of cam grooves 2320 with different sizes are provided on the outer wall of the rotating shaft 232.

[0055] Specifically, the left and right ends of the rotating shaft 232 are respectively rotatably connected to the outer walls of the frame bodies at the left and right ends of the connection frame 210. One end of the rotating shaft 232 passes through the frame body and is coaxially connected to the output shaft of the second motor 231.

[0056] Furthermore, after the second motor 231 is started, it can drive the rotating shaft 232 to rotate. And through a plurality of cam grooves 2320 with different sizes on the rotating shaft 232, the connector 240 is带动 to swing left and right with different amplitudes.

[0057] The above configuration constitutes the core drive unit for the swing function. The second motor 231 drives the rotating shaft 232 with cam grooves 2320 of various specifications, providing the connector 240 with a variety of preset, mechanically reproduced swing trajectories, which is the power and trajectory basis for realizing different swing amplitudes.

[0058] Please see Figures 7-10 As shown, in this embodiment, the connector 240 includes a slider 241 for housing the welding device 300, a rotating tube 244 rotating on the top surface of the slider 241, a screw 245 sleeved inside the rotating tube 244 and threadedly connected to the slider 241, a lever 246 disposed on the outer wall of the screw 245, a protrusion 247 sliding on the bottom end of the screw 245, and a spring 248 sleeved on the outside of the screw 245. A groove 2440 is provided on the outer wall of the rotating tube 244. After the rotating shaft 232 rotates, it can drive the protrusion 247 to move along the trajectory of the cam groove 2320, thereby causing the connector 240 and the lead screw 222 to swing left and right. After the rotating tube 244 rotates, the lever 246 is actuated by the groove 2440, which drives the screw 245 to rotate, and the locking state of the protrusion 247 is adjusted by the spring 248.

[0059] Specifically, the slider 241 is threaded to the outside of the lead screw 222 and slidably connected to the outside of the rotating shaft 232. The slider 241 has a sliding hole 2410 inside that is adapted to the size of the rotating shaft 232 and is open from left to right. The top surface of the slider 241 has a lower through hole 2411 that is connected to the sliding hole 2410.

[0060] Furthermore, the connector 240 also includes a cover plate 242 snapped onto the top surface of the slider 241 and a drive motor 243 fixed to the top surface of the internal partition of the cover plate 242 by screws.

[0061] Furthermore, the top end of the rotating tube 244 is coaxially connected to the output shaft of the drive motor 243, the screw 245 is threaded into the interior of the lower through hole 2411, the bottom end of the screw 245 is integrally formed with a sleeve 2450, and the lever 246 is snapped and fixed on the outer wall of the screw 245 with its end extending to the outside of the lever groove 2440.

[0062] Furthermore, the protrusion 247 is slidably connected to the interior of the lower through hole 2411. The end of the protrusion 247 is adapted to the size of the cam groove 2320. The top of the protrusion 247 is integrally formed with a circular plate for limiting its sliding range. The center of the top surface of the protrusion 247 is integrally formed with a central shaft 2470 that slides in the sleeve 2450. The spring 248 is sleeved on the outside of the sleeve 2450. The upper and lower ends of the spring 248 abut against the bottom surface of the screw 245 and the circular plate at the top of the protrusion 247, respectively.

[0063] Furthermore, keeping the connector 240 in the same position, the drive motor 243 is started, driving the rotating tube 244 to rotate; the groove 2440 on the outer wall of the rotating tube 244 moves the lever 246, forcing the screw 245 to rotate; since the screw 245 is threadedly engaged with the lower through hole 2411 on the slider 241, the rotation of the screw 245 will be converted into downward linear motion, compressing the spring 248 and pushing the sleeve 2450 to move downward on the central shaft 2470 until the end of the sleeve 2450 abuts against the top surface of the protrusion 247, so that its end is fully embedded in the selected cam groove 2320, and ensuring that the protrusion 247 maintains reliable engagement with the cam groove 2320 during the swinging process without impact disengagement.

[0064] Furthermore, if it is necessary to change the swing trajectory during the welding process, first stop the second motor 231; then, start the drive motor 243 in the opposite direction, reset the screw 245, so that the protrusion 247 can compress the spring 248 and move upward, and be lifted out of the current cam groove 2320.

[0065] The above-mentioned setup controls the engagement and disengagement of the protrusion 247 and different cam grooves 2320 on the rotating shaft 232 through the drive motor 243, realizing the rapid and reliable selection and locking of the swing trajectory. It is the key actuator for the precise execution and flexible switching of the swing function.

[0066] Finally, it should be noted that the first motor 221, the second motor 231, and the drive motor 243 involved in this utility model are all general standard parts or components known to those skilled in the art. Their structures and principles can be learned by those skilled in the art through technical manuals or conventional experimental methods. In the idle part of this device, the first motor 221, the second motor 231, and the drive motor 243 are connected to an external power source through wires. The specific connection method should refer to the working principle of this utility model. The electrical components are electrically connected in the order of operation. The detailed connection methods are all technologies known in the art.

[0067] When using the open arc welding slide of this utility model with added swing shaft mechanism, firstly, the connecting frame 210 in the swing device 200 is installed on the slide table in the longitudinal moving assembly of the movable slide 100; the welding device 300 is fixedly installed on the slider 241 in the connector 240 by bolts; and the power supply of the first motor 221, the second motor 231 and the drive motor 243 is turned on.

[0068] Next, the operator selects and positions the target. Based on the required swing amplitude for the welding process, the operator observes the cam grooves 2320 of different sizes on the rotating shaft 232 to determine the target groove. The first motor 221 is started to drive the lead screw 222 to rotate. Since the slider 241 is threaded to the lead screw 222 and is sleeved on the rotating shaft 232 through the sliding hole 2410, the connector 240 will move laterally along the axis of the rotating shaft 232. The end of the protrusion 247 is moved to a position axially aligned with the selected target cam groove 2320 by visual inspection.

[0069] Subsequently, the connector 240 is inserted and locked, keeping its position unchanged. The drive motor 243 is started, which drives the rotating tube 244 to rotate. The groove 2440 on the outer wall of the rotating tube 244 moves the lever 246, forcing the screw 245 to rotate.

[0070] Since the screw 245 is threaded into the lower through hole 2411 on the slider 241, the rotation of the screw 245 will be converted into a downward linear motion, compressing the spring 248 and pushing the sleeve 2450 to move downward on the central shaft 2470 until the end of the sleeve 2450 abuts against the top surface of the protrusion 247, so that its end is fully embedded in the selected cam groove 2320, and ensuring that the protrusion 247 maintains reliable engagement with the cam groove 2320 during the swinging process without impact disengagement;

[0071] Afterwards, the preset trajectory oscillating welding is performed, the second motor 231 is started, and the rotating shaft 232 is driven to rotate at a constant speed; since the protrusion 247 is embedded in the cam groove 2320, the rotation of the rotating shaft 232 will force the protrusion 247 to move along the spatial trajectory of the cam groove 2320; this movement drives the entire connector 240, bracket 223 and welding device 300 to oscillate back and forth in the horizontal plane through the protrusion 247; at the same time, the moving carriage 100 can be controlled to feed slowly, thereby forming a continuous and uniform spiral or strip welding layer on the surface of the workpiece;

[0072] Subsequently, if it is necessary to change the swing trajectory during the welding process, first stop the second motor 231; then, start the drive motor 243 in the opposite direction, reset the screw 245 so that the protrusion 247 can compress the spring 248 and move upward, and be lifted out of the current cam groove 2320; and then start the first motor 221 again to position and lock the protrusion 247 into the new cam groove 2320, so that the swing mode can be quickly switched.

[0073] The foregoing description of specific exemplary embodiments of the present invention is for illustrative and explanatory purposes. These descriptions are not intended to limit the present invention to the precise forms disclosed, and it will be apparent that many changes and variations can be made in accordance with the foregoing teachings. The exemplary embodiments were chosen and described in order to explain the specific principles of the present invention and its practical applications, thereby enabling those skilled in the art to implement and utilize various different exemplary embodiments of the present invention, as well as various different choices and variations. The scope of the present invention is intended to be defined by the specification and its equivalents.

Claims

1. An open arc welding slide with an added swing shaft mechanism, comprising a movable slide (100) and a welding device (300), characterized in that: A swing device (200) is provided on the slide table of the longitudinal movement component of the moving carriage (100). The swing device (200) includes a connecting frame (210), a screw rod (222), a rotating shaft (232) and a connector (240) arranged inside the connecting frame (210). A plurality of cam grooves (2320) with different sizes are provided on the outer wall of the rotating shaft (232). The connector (240) includes a slider (241) for placing the welding device (300), a rotating tube (244) rotating on the top surface of the slider (241), a screw rod (245) sleeved in the rotating tube (244) and threadedly connected to the inside of the slider (241), a dial rod (246) arranged on the outer wall of the screw rod (245), a convex block (247) sliding at the bottom end of the screw rod (245), and a spring (248) sleeved outside the screw rod (245). A dial groove (2440) is provided on the outer wall of the rotating tube (244). After the screw rod (222) rotates, the position of the connector (240) on the rotating shaft (232) can be adjusted. After the rotating shaft (232) rotates, it can drive the convex block (247) to move along the track of the cam groove (2320), and带动 the connector (240) and the screw rod (222) to swing left and right. After the rotating tube (244) rotates, it拨动 the dial rod (246) through the dial groove (2440),驱使 the screw rod (245) to rotate, and then调整 the locking state of the convex block (247) through the spring (248).

2. The open arc welding slide with added swing shaft mechanism according to claim 1, characterized in that: The connecting frame (210) is fixedly connected to the outer wall of the slide table in the longitudinal movement component of the moving carriage (100) by bolts. Square frames are welded on the outer walls of the left and right ends of the connecting frame (210). A guide rail is fixedly connected to the outer wall of the connecting frame (210) between the two square frames by bolts.

3. The open-arc welding slide with added swing shaft mechanism according to claim 2, characterized in that: The swing device (200) further includes a transverse movement part (220) and a swing part (230). The transverse movement part (220) includes a first motor (221) and a bracket (223) sleeved outside the screw rod (222) and having a U-shaped cross section.

4. The open-arc welding slide with added swing shaft mechanism according to claim 3, characterized in that: The first motor (221) is fixedly connected to the outer wall of the bracket (223) by bolts. The screw rod (222) is rotatably connected to the inside of the bracket (223). One end of the screw rod (222) passes through the outer wall of the bracket (223) and is coaxially connected to the output shaft of the first motor (221). The bracket (223) is slidably connected to the guide rail on the outer wall of the connecting frame (210).

5. The open arc welding slide with added swing shaft mechanism according to claim 4, characterized in that: The swing part (230) further includes a second motor (231). The second motor (231) is fixedly connected to the outer wall of the direction frame at one end of the connecting frame (210) by bolts.

6. The open-arc welding slide with added swing shaft mechanism according to claim 5, characterized in that: The left and right ends of the rotating shaft (232) are respectively rotatably connected to the outer walls of the direction frames at the left and right ends of the connecting frame (210). One end of the rotating shaft (232) passes through the direction frame and is coaxially connected to the output shaft of the second motor (231).

7. The open-arc welding slide with added swing shaft mechanism according to claim 6, characterized in that: The slider (241) is threaded to the outside of the lead screw (222) and slidably connected to the outside of the rotating shaft (232). The slider (241) has a sliding hole (2410) that is adapted to the size of the rotating shaft (232) and is open to the left and right. The top surface of the slider (241) has a lower through hole (2411) that is connected to the sliding hole (2410).

8. The open-arc welding slide with added swing shaft mechanism according to claim 7, characterized in that: The connector (240) also includes a cover plate (242) snapped onto the top surface of the slider (241) and a drive motor (243) fixed to the top surface of the internal partition of the cover plate (242) by screws.

9. The open-arc welding slide with added swing shaft mechanism according to claim 8, characterized in that: The top end of the rotating tube (244) is coaxially connected to the output shaft of the drive motor (243). The screw (245) is threaded into the interior of the lower through hole (2411). The bottom end of the screw (245) is integrally formed with a sleeve (2450). The lever (246) is snapped and fixed on the outer wall of the screw (245) and its end extends to the outside of the lever groove (2440).

10. The open-arc welding slide with added swing shaft mechanism according to claim 9, characterized in that: The protrusion (247) is slidably connected to the inside of the lower through hole (2411). The end of the protrusion (247) is adapted to the size of the cam groove (2320). The top of the protrusion (247) is integrally formed with a circular plate for limiting its sliding range. The center of the top surface of the protrusion (247) is integrally formed with a central shaft (2470) that slides in the sleeve (2450). The spring (248) is sleeved on the outside of the sleeve (2450). The upper and lower ends of the spring (248) abut against the bottom surface of the screw (245) and the circular plate at the top of the protrusion (247), respectively.

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