A welding device for metal product processing

Abstract

This invention relates to the field of welding equipment technology and discloses a welding device for metal product processing, including a frame and an arc welding torch. The arc welding torch is disposed above the frame, and the frame is provided with a workpiece rotation clamping mechanism and a rotation drive mechanism. The workpiece rotation clamping mechanism includes two turntables, a rotating plate, and a pipe support. The two turntables are respectively rotatably mounted at both ends of the frame, the rotating plate is rotatably mounted on the turntables, and the pipe support is fixedly mounted on the rotating plate. This welding device for metal product processing, by setting the workpiece rotation clamping mechanism and the rotation drive mechanism in cooperation, can flexibly adjust the angle between workpieces while completing the workpiece clamping and rotation. It solves the problems of traditional welding devices being unable to adapt to the welding requirements of V-shaped, oblique angle, and other multi-angle butt welding, as well as the inconvenience of adjusting the weld position, and greatly improves the adaptability of the device to workpieces with different angles and the convenience of welding operation.

Description

Technical Field

[0001] This invention relates to the field of welding equipment technology, specifically to a welding device for processing metal products. Background Technology

[0002] In metal product processing, butt welding of profiles such as square tubes and round tubes is a common process, widely used in building frames, machinery and equipment, furniture manufacturing and other fields. Traditional welding equipment mostly uses fixed clamps or simple rotating clamps to hold the workpiece. When performing non-linear angle (such as V-shape, oblique angle) butt welding, it is usually necessary to manually calculate and fix the workpiece angle in advance.

[0003] Chinese patent CN120395331B discloses a profile welding device for building engineering. Through a sliding positioning and docking component, it can push two profiles closer to each other to achieve docking while clamping the tubular profile.

[0004] The aforementioned device addresses the problem of workpieces being joined along a straight axial direction, but lacks a mechanism for flexibly and precisely adjusting the angle between two workpieces, making it difficult to adapt to multi-angle welding requirements such as V-shaped and oblique angles. Secondly, after assembling workpieces that are not joined in a straight line, adjusting the position of the weld seam relative to the arc welding gun usually requires an additional drive mechanism or manual handling, which is inconvenient. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a welding device for metal product processing, which has the function of automatically adjusting the included angle between two workpieces and realizing overall rotation, thus solving the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: A welding apparatus for processing metal products includes a frame and an arc welding torch, the arc welding torch being disposed above the frame. The frame is equipped with a workpiece rotation clamping mechanism and a rotation drive mechanism. The workpiece rotation clamping mechanism includes two turntables, a rotating plate, and a pipe support. The two turntables are rotatably mounted at both ends of the frame, the rotating plate is rotatably mounted on the turntables, and the pipe support is fixedly mounted on the rotating plate. The rotation drive mechanism includes a drive shaft, a transmission rod, a limit transmission assembly, and an angle adjustment assembly. The drive shaft is rotatably mounted on the frame, and both ends of the transmission rod are rotatably connected to the two turntables. The limit transmission assembly transmits the rotational power of the drive shaft to one of the turntables to drive its rotation, and interrupts the power transmission when the pipe support rotates to a horizontal position with the turntable. When the limit transmission assembly interrupts the power transmission, the drive shaft drives the transmission rod to rotate relative to the turntable. The angle adjustment assembly drives the two rotating plates to rotate relative to each other through the rotation of the transmission rod, thereby changing the included angle between the two pipe supports.

[0007] Preferably, the two turntables are respectively configured as an active turntable and a passive turntable. A drive shaft is coaxially fixedly mounted on one end of the active turntable. The limiting transmission assembly includes a rotating frame, a fixed ring, and a rotating plate. The rotating frame is rotatably mounted on the drive shaft, the fixed ring is fixedly mounted on the rotating frame, and the rotating plate is fixedly mounted on the drive shaft. The drive shaft, drive shaft, fixed ring, and rotating plate are coaxially arranged. The fixed ring is sleeved on the outside of the rotating plate, and there is a transmission connection between the fixed ring and the rotating plate. A passive shaft is coaxially fixedly mounted on the passive turntable, and the passive shaft is rotatably mounted on the frame.

[0008] Preferably, the inner wall of the fixed ring is provided with a slot, and the outer side of the rotating plate is provided with a ball groove. A steel ball and a supporting spring are movably arranged in the ball groove. One end of the supporting spring acts on the steel ball, causing the steel ball to protrude out of the ball groove and be able to be locked into the slot, so that the fixed ring and the rotating plate rotate synchronously.

[0009] Preferably, the limiting transmission assembly further includes a drive gear and a driven gear. The drive gear is fixedly mounted on the drive shaft, and the driven gear is fixedly mounted on the transmission rod. The drive gear meshes with the driven gear, and the transmission rod passes through the rotating frame and is rotatably connected to it.

[0010] Preferably, the angle adjustment assembly includes a slider, an internally threaded tube, a transverse plate, a sliding hole, and a sliding rod. The slider is slidably mounted on the drive shaft and the driven shaft, respectively. The internally threaded tube is threaded to both ends of the drive rod, and the slider and the internally threaded tube on the same side are fixedly connected by the transverse plate.

[0011] Preferably, the side of the transverse plate is provided with a sliding hole, and a sliding rod is slidably installed inside the sliding hole, and the sliding rod is fixedly connected to one end of the rotating plate; both sides of the transmission rod are provided with threads in opposite directions of rotation, and when the transmission rod rotates relative to the turntable, the internal threaded tubes on both sides move linearly in opposite directions.

[0012] Preferably, a clamping plate is slidably installed inside the pipe support, and a pull plate is fixedly installed at one end of the clamping plate. The pull plate extends through the inner wall of the pipe support to the outer side of the pipe support. A straight rod is fixedly installed on the pull plate, and a baffle is fixedly installed on the straight rod. A tension spring is sleeved on the straight rod, and the two ends of the tension spring are fixedly connected to the pull plate and the pipe support, respectively. A stop block is fixedly installed on the upper surface of the frame. When the turntable rotates and one side wall of the pipe support is in a horizontal state, the pipe support contacts the stop block, and the baffle pushes the clamping plate to contact one side inner wall of the pipe support.

[0013] Preferably, slag-shaking plates are rotatably mounted on both sides inside the frame, and a connecting shaft is rotatably mounted between the two ends of the frame. A transmission gear is fixedly mounted on the connecting shaft. The outer side of the drive disc has a toothed groove that meshes with the transmission gear. A rocking disc is fixedly mounted on the connecting shaft. A rocker arm is rotatably mounted on the rocking disc. The rocker arm is rotatably connected to the lower surface of the slag-shaking plates.

[0014] Preferably, rollers are provided on both inner walls of the frame, and the rollers are located on both sides of the turntable and are rotatably connected to the turntable.

[0015] Compared with the prior art, the present invention provides a welding device for metal product processing, which has the following advantages: This welding device for metal product processing, by setting up a workpiece rotation clamping mechanism and a rotation drive mechanism in combination, can flexibly adjust the angle between workpieces while clamping and rotating the workpiece. It solves the problems of traditional welding devices being unable to adapt to the welding needs of V-shaped, oblique angle and other multi-angle butt welding and the inconvenience of adjusting the weld position, and greatly improves the adaptability of the device to workpieces with different angles and the convenience of welding operation.

[0016] This welding device for metal product processing, by setting a limit transmission component in conjunction with an angle adjustment component, can realize the controllable transmission and interruption of the rotary table's rotation power. After the workpiece rotates to a horizontal state, it automatically switches to the included angle adjustment mode. It can complete the station conversion and angle fine adjustment without the need to switch the drive source, thus improving the continuity of the device's operation and the adjustment accuracy.

[0017] This welding device for metal product processing, by setting up an elastic clamping structure in conjunction with a stop block and a slag-removing linkage mechanism, can automatically complete the clamping and positioning of the workpiece when it rotates into place. At the same time, it uses the rotation power of the turntable to synchronously clean the welding slag, eliminating the need for a separate clamping drive and slag-removing mechanism, simplifying the device structure and improving the automation and cleanliness of the welding operation. Attached Figure Description

[0018] Figure 1 This is one of the three-dimensional structural schematic diagrams of the welding device for metal product processing according to the present invention; Figure 2 This is a second three-dimensional structural schematic diagram of the welding device for metal product processing according to the present invention; Figure 3 This is the third three-dimensional structural schematic diagram of the welding device for metal product processing according to the present invention; Figure 4 For the present invention Figure 3 Enlarged schematic diagram of the local structure at point A; Figure 5 For the present invention Figure 3 Enlarged schematic diagram of the local structure at point B; Figure 6 For the present invention Figure 3 Enlarged schematic diagram of the local structure at point C; Figure 7 This is the fourth three-dimensional structural schematic diagram of the welding device for metal product processing according to the present invention; Figure 8 For the present invention Figure 7 Enlarged schematic diagram of the local structure at point D; Figure 9 Fifth of the three-dimensional structural schematic diagrams of the welding device for metal product processing of the present invention; Figure 10 This is the sixth three-dimensional structural schematic diagram of the welding device for metal product processing according to the present invention; Figure 11 For the present invention Figure 10 A magnified schematic diagram of the local structure at point E in the middle.

[0019] In the picture: Frame; 11. Stop; 2. Arc welding torch; 3. Workpiece rotation clamping mechanism; 31. Turntable; 311. Driving disc; 312. Driven disc; 313. Drive shaft; 314. Driven shaft; 32. Rotary plate; 33. Pipe support; 331. Clamping plate; 332. Pull plate; 333. Straight rod; 334. Baffle; 335. Tension spring; 4. Rotary drive mechanism; 41. Drive shaft; 42. Transmission rod; 43. Limit transmission assembly; 431. Rotary... Frame; 432, Fixing ring; 433, Rotating plate; 434, Slot; 435, Ball groove; 436, Steel ball; 437, Support spring; 438, Drive gear; 439, Driven gear; 44, Angle adjustment assembly; 441, Slider; 442, Internally threaded tube; 443, Horizontal plate; 444, Sliding hole; 445, Sliding rod; 5, Slag shaking plate; 6, Connecting shaft; 61, Transmission gear; 62, Shaking disc; 63, Rocker arm; 7, Roller. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example

[0021] Please see Figure 1 , Figure 2 , Figure 3 and Figure 4This invention provides a welding device for metal product processing, including a frame 1 and an arc welding torch 2. The arc welding torch 2 is disposed above the frame 1. The frame 1 is provided with a workpiece rotation clamping mechanism 3 and a rotation drive mechanism 4. The workpiece rotation clamping mechanism 3 includes two turntables 31, a rotating plate 32, and a pipe support 33. The two turntables 31 are rotatably mounted at both ends of the frame 1, the rotating plate 32 is rotatably mounted on the turntables 31, and the pipe support 33 is fixedly mounted on the rotating plate 32. The rotation drive mechanism 4 includes a drive shaft 41, a transmission rod 42, a limit transmission assembly 43, and an angle adjustment assembly 44. The drive shaft 41 is rotatably mounted on the frame 1. The two ends of the transmission rod 42 are rotatably connected to two turntables 31 respectively. The limiting transmission assembly 43 is used to transmit the rotational power of the drive shaft 41 to one of the turntables 31 to drive the turntable 31 to rotate. When the tube support 33 rotates with the turntable 31 to a horizontal state, the power transmission is interrupted. When the limiting transmission assembly 43 interrupts the power transmission, the drive shaft 41 drives the transmission rod 42 to rotate relative to the turntable 31. The angle adjustment assembly 44 drives the two rotating plates 32 to rotate relative to each other through the rotation of the transmission rod 42, thereby changing the included angle between the two tube supports 33.

[0022] As can be seen from the above, this application integrates the workpiece rotation clamping mechanism 3 with the rotation drive mechanism 4, using a single drive shaft 41 as the power source. Through the coordinated actions of the limit transmission component 43 and the angle adjustment component 44, the device can automatically and continuously complete two steps: First, it drives the two tube supports 33 carrying the workpieces to rotate synchronously to a horizontal alignment state and lock them in place; then, the system automatically switches, drives the transmission rod 42 to rotate, and drives the two rotating plates 32 to rotate relative to each other in the horizontal plane through the angle adjustment component 44, thereby precisely adjusting the horizontal angle between the support axes of the two workpieces. After the angle is preset, the two square tubes to be welded can be placed in the two horizontal tube supports 33 respectively and the welding ends are aligned to complete the setting of the welding angle. Subsequently, by driving the revolution through the reverse rotation of the drive shaft 41, the weld seams on different sides of the workpiece can be rotated to the optimal welding position. In this embodiment, the arc welding gun 2 needs to have height, lateral and posture adjustment functions suitable for weld seam tracking. Such structures are existing technologies and will not be described in detail in this application. In addition, a control motor is also installed on the frame 1 in this application, and the drive shaft 41 is rotated by controlling the drive motor.

[0023] When using this device, first adjust the pipe support 33 to a horizontal state and adjust the angle by rotating the drive shaft 41. Then, place the two square tube workpieces to be welded on the two pipe supports 33 respectively. Then, rotate the drive shaft 41 in the opposite direction to make the pipe support 33 rotate away from the horizontal state. Then, weld one or both sides of the square tube by the arc welding gun 2. After welding is completed, continue to rotate the turntable 31 to expose the welding position that was inconvenient to weld before, and weld again by the arc welding gun 2. Example

[0024] like Figure 3 , Figure 4 , Figure 5 and Figure 9 As shown, the difference between this embodiment and the above embodiment is that the two turntables 31 are respectively set as an active turntable 311 and a passive turntable 312. One end of the active turntable 311 is coaxially fixedly mounted with a transmission shaft 313. The limiting transmission assembly 43 includes a rotating frame 431, a fixed ring 432 and a rotating plate 433. The rotating frame 431 is rotatably mounted on the transmission shaft 313, the fixed ring 432 is fixedly mounted on the rotating frame 431, and the rotating plate 433 is fixedly mounted on the drive shaft 41. The transmission shaft 313, the drive shaft 41, the fixed ring 432 and the rotating plate 433 are coaxially arranged. The fixed ring 432 is sleeved on the outside of the rotating plate 433, and there is a transmission connection between the fixed ring 432 and the rotating plate 433. A passive shaft 314 is coaxially fixedly mounted on the passive turntable 312, and the passive shaft 314 is rotatably mounted on the frame 1.

[0025] The inner wall of the fixed ring 432 is provided with a slot 434, and the outer side of the rotating plate 433 is provided with a ball groove 435. A steel ball 436 and a support spring 437 are movably arranged in the ball groove 435. One end of the support spring 437 acts on the steel ball 436, causing part of the steel ball 436 to protrude out of the ball groove 435 and be able to be locked into the slot 434, so that the fixed ring 432 and the rotating plate 433 rotate synchronously.

[0026] The limit transmission assembly 43 also includes a drive gear 438 and a driven gear 439. The drive gear 438 is fixedly mounted on the drive shaft 41, and the driven gear 439 is fixedly mounted on the transmission rod 42. The drive gear 438 meshes with the driven gear 439, and the transmission rod 42 passes through the rotating frame 431 and is rotatably connected to it.

[0027] As can be seen from the above, when the drive shaft 41 rotates, it first drives the rotating frame 431 and the drive disc 311 to revolve through the transmission effect of the rotating plate 433 and the fixed ring 432; when the tube support 33 revolves to a horizontal state, the clutch disengages, and the power is then transmitted to the transmission rod 42 through the gear pair, driving it to rotate to perform the angle adjustment function, realizing the automatic and reliable switching between two motion modes under a single power source; the fixed ring 432 and the rotating plate 433 are connected by steel balls 436 being engaged in the slot 434 under the action of spring force to form a clutch structure that can withstand a certain pressure. The structure can transmit torque during the revolution phase. When the tube support 33 contacts the stop block 11, causing an increase in resistance, the steel ball 436 can be squeezed out of the slot 434, thereby automatically and gently interrupting the transmission of power to the turntable 31. This ensures the reliability of mode switching and the durability of the structure. Through this design, when the tube support 33 contacts the upper surfaces of both sides of the frame 1, the transmission between the fixed ring 432 and the rotating plate 433 can be interrupted. After the transmission between the fixed ring 432 and the rotating plate 433 is interrupted, the angle between the two tube supports 33 can be adjusted. Example

[0028] like Figure 5 and Figure 7 As shown, the difference between this embodiment and the above embodiment is that the angle adjustment component 44 includes a slider 441, an internally threaded tube 442, a transverse plate 443, a sliding hole 444, and a sliding rod 445. The slider 441 is slidably mounted on the transmission shaft 313 and the driven shaft 314 respectively. The internally threaded tube 442 is threadedly connected to both ends of the transmission rod 42 respectively. The slider 441 and the internally threaded tube 442 on the same side are fixedly connected by the transverse plate 443.

[0029] The side of the transverse plate 443 is provided with a sliding hole 444, and a sliding rod 445 is slidably installed inside the sliding hole 444. The sliding rod 445 is fixedly connected to one end of the rotating plate 32. Both sides of the transmission rod 42 are provided with threads in opposite directions of rotation. When the transmission rod 42 rotates relative to the turntable 31, the internal thread tubes 442 on both sides move linearly in opposite directions.

[0030] As can be seen from the above, in this embodiment, the reverse threads at both ends of the transmission rod 42 drive the two internally threaded tubes 442 to make linear movements in opposite directions; each internally threaded tube 442 drives the slider 441 to slide along the axis through the transverse plate 443, and the transverse plate 443 cooperates with the slide rod 445 fixed to the rotating plate 32 through the sliding hole 444, thereby converting the linear movement of the internally threaded tube 442 into the rotational movement of the rotating plate 32, and synchronously and symmetrically converting the unidirectional rotation of the transmission rod 42 into the equal-amplitude opposite rotation of the two rotating plates 32, ensuring the central symmetry and accuracy of the included angle adjustment. Example

[0031] like Figure 6 , Figure 8 , Figure 10 and Figure 11 As shown, the difference between this embodiment and the above embodiment is that a clamping plate 331 is slidably installed inside the pipe support 33, and a pull plate 332 is fixedly installed at one end of the clamping plate 331. The pull plate 332 extends through the inner wall of the pipe support 33 to the outer side of the pipe support 33. A straight rod 333 is fixedly installed on the pull plate 332, and a baffle 334 is fixedly installed on the straight rod 333. A tension spring 335 is sleeved on the straight rod 333. The two ends of the tension spring 335 are fixedly connected to the pull plate 332 and the pipe support 33, respectively. A stop block 11 is fixedly installed on the upper surface of the frame 1. When the turntable 31 rotates and makes one side wall of the pipe support 33 in a horizontal state, the pipe support 33 contacts the stop block 11, and the baffle 334 pushes the clamping plate 331 to contact one side inner wall of the pipe support 33.

[0032] As can be seen from the above, when the tube support 33 revolves to the horizontal position, its outer wall contacts the stop block 11, forcing the entire tube support 33 to stop rotating. Meanwhile, the baffle 334 connected by the straight rod 333 inside is compressed, pushing the clamping plate 331 to move inward, overcoming the tension of the tension spring 335 and releasing the workpiece. Therefore, when the tube support 33 is in a horizontal state and the baffle 334 is facing down, the clamping plate 331 automatically releases its grip on the square tube. When the tube support 33 is tilted, the tension spring 335 pulls the clamping plate 331 to clamp the square tube.

[0033] Both sides of the frame 1 are rotatably mounted with slag-shaking plates 5, and a connecting shaft 6 is rotatably mounted between the two ends of the frame 1. A transmission gear 61 is fixedly mounted on the connecting shaft 6. The outer side of the drive disc 311 is provided with a toothed groove that meshes with the transmission gear 61. A rocking disc 62 is fixedly mounted on the connecting shaft 6. A rocker arm 63 is rotatably mounted on the rocking disc 62. The rocker arm 63 is rotatably connected to the lower surface of the slag-shaking plates 5.

[0034] As can be seen from the above, the toothed drive gear 61 and connecting shaft 6 on the outer side of the active disk 311 rotate, and the rocking disk 62 fixed on the connecting shaft 6 rotates accordingly. The rocking disk 62 drives the slag-removing plate 5 to swing back and forth through the rocker arm 63, thereby shaking off the welding slag collected on it and keeping the working area clean. This function is entirely derived from the power of the main drive shaft 41 and does not require an additional power source.

[0035] Rollers 7 are provided on both inner walls of the frame 1. The rollers 7 are located on both sides of the turntable 31 and are tactilely connected to the turntable 31.

[0036] As can be seen from the above, the rollers 7 set on the inner wall of the frame 1 roll in contact with the side edge of the turntable 31, providing effective support for the turntable 31, which mainly bears the radial load, enhancing the rigidity and smooth operation of the turntable 31 when rotating, especially when carrying workpieces, and reducing the bending stress of the drive shaft 313 and the driven shaft 314.

[0037] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A welding apparatus for processing metal products, comprising a frame (1) and an arc welding torch (2), wherein the arc welding torch (2) is disposed above the frame (1), characterized in that: The frame (1) is provided with a workpiece rotation clamping mechanism (3) and a rotation drive mechanism (4). The workpiece rotation clamping mechanism (3) includes two turntables (31), a rotating plate (32), and a tube support (33). The two turntables (31) are rotatably mounted on both ends of the frame (1). The rotating plate (32) is rotatably mounted on the turntables (31), and the tube support (33) is fixedly mounted on the rotating plate (32). The rotation drive mechanism (4) includes a drive shaft (41), a transmission rod (42), a limit transmission assembly (43), and an angle adjustment assembly (44). The drive shaft (41) is rotatably mounted on the frame (1), and the transmission rod (42) is fixedly mounted on the rotating plate (33). The two ends of the moving rod (42) are rotatably connected to two turntables (31) respectively. The limiting transmission assembly (43) is used to transmit the rotational power of the drive shaft (41) to one of the turntables (31) to drive the turntable (31) to rotate. When the tube support (33) rotates with the turntable (31) to a horizontal state, the power transmission is interrupted. When the limiting transmission assembly (43) interrupts the power transmission, the drive shaft (41) drives the transmission rod (42) to rotate relative to the turntable (31). The angle adjustment assembly (44) drives the two rotating plates (32) to rotate relative to each other through the rotation of the transmission rod (42), thereby changing the included angle between the two tube supports (33).

2. The welding apparatus for processing metal products according to claim 1, characterized in that: The two turntables (31) are respectively configured as an active disc (311) and a passive disc (312). One end of the active disc (311) is coaxially fixedly mounted with a drive shaft (313). The limiting transmission assembly (43) includes a rotating frame (431), a fixed ring (432), and a rotating plate (433). The rotating frame (431) is rotatably mounted on the drive shaft (313), the fixed ring (432) is fixedly mounted on the rotating frame (431), and the rotating plate (313) is fixedly mounted on the drive shaft (313). 433) is fixedly installed on the drive shaft (41). The transmission shaft (313), drive shaft (41), fixed ring (432) and rotating plate (433) are coaxially arranged. The fixed ring (432) is sleeved on the outside of the rotating plate (433), and the fixed ring (432) and rotating plate (433) are connected by transmission. A passive shaft (314) is coaxially fixedly installed on the passive disk (312). The passive shaft (314) is rotatably installed on the frame (1).

3. The welding apparatus for processing metal products according to claim 2, characterized in that: The inner wall of the fixed ring (432) is provided with a slot (434), and the outer side of the rotating plate (433) is provided with a ball groove (435). A steel ball (436) and a support spring (437) are movably arranged in the ball groove (435). One end of the support spring (437) acts on the steel ball (436), so that part of the steel ball (436) protrudes out of the ball groove (435) and can be inserted into the slot (434), so that the fixed ring (432) and the rotating plate (433) rotate synchronously.

4. The welding apparatus for processing metal products according to claim 2, characterized in that: The limiting transmission assembly (43) further includes a drive gear (438) and a driven gear (439). The drive gear (438) is fixedly mounted on the drive shaft (41), and the driven gear (439) is fixedly mounted on the transmission rod (42). The drive gear (438) meshes with the driven gear (439), and the transmission rod (42) passes through the rotating frame (431) and is rotatably connected to it.

5. The welding apparatus for processing metal products according to claim 2, characterized in that: The angle adjustment assembly (44) includes a slider (441), an internally threaded tube (442), a transverse plate (443), a sliding hole (444), and a sliding rod (445). The slider (441) is slidably mounted on the transmission shaft (313) and the driven shaft (314), respectively. The internally threaded tube (442) is threaded to both ends of the transmission rod (42), respectively. The slider (441) and the internally threaded tube (442) on the same side are fixedly connected by the transverse plate (443).

6. The welding apparatus for processing metal products according to claim 5, characterized in that: The transverse plate (443) has a sliding hole (444) on its side. A sliding rod (445) is slidably installed inside the sliding hole (444), and the sliding rod (445) is fixedly connected to one end of the rotating plate (32). Both sides of the transmission rod (42) are provided with threads in opposite directions of rotation. When the transmission rod (42) rotates relative to the turntable (31), the internal threaded tubes (442) on both sides move linearly in opposite directions.

7. The welding apparatus for processing metal products according to claim 1, characterized in that: The pipe support (33) is slidably installed with a clamping plate (331). A pull plate (332) is fixedly installed at one end of the clamping plate (331). The pull plate (332) extends through the inner wall of the pipe support (33) to the outer side of the pipe support (33). A straight rod (333) is fixedly installed on the pull plate (332). A baffle (334) is fixedly installed on the straight rod (333). A tension spring (335) is sleeved on the straight rod (333). The two ends of the tension spring (335) are fixedly connected to the pull plate (332) and the pipe support (33) respectively. A stop block (11) is fixedly installed on the upper surface of the frame (1). When the turntable (31) rotates and one side wall of the pipe support (33) is in a horizontal state, the pipe support (33) contacts the stop block (11), and the baffle (334) pushes the clamping plate (331) to contact one side inner wall of the pipe support (33).

8. The welding apparatus for processing metal products according to claim 2, characterized in that: The frame (1) has slag-shaking plates (5) rotatably mounted on both sides inside, and a connecting shaft (6) rotatably mounted between the two ends of the frame (1). A transmission gear (61) is fixedly mounted on the connecting shaft (6). The outer side of the drive disc (311) is provided with a tooth groove that meshes with the transmission gear (61). A rocking disc (62) is fixedly mounted on the connecting shaft (6). A rocker arm (63) is rotatably mounted on the rocking disc (62). The rocker arm (63) is rotatably connected to the lower surface of the slag-shaking plate (5).

9. A welding apparatus for processing metal products according to claim 1, characterized in that: Rollers (7) are provided on both sides of the inner wall of the frame (1). The rollers (7) are located on both sides of the turntable (31) and are tactilely connected to the turntable (31).

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