An automated welding apparatus

Abstract

This invention relates to the field of welding technology, specifically disclosing an automated welding equipment for welding arc-shaped welds and radial stepped welds on disc-shaped workpieces. The equipment includes: a frame; a rotating tooling unit; a welding unit; a lifting unit; and a radial feed unit. When welding arc-shaped welds, a cylindrical mounting base embedded within the radial stepped weld and a molten pool support form a circumferential limit. This limit is detachable from the offset mounting plate, ensuring continuous effectiveness of the limit during welding. This effectively counteracts welding stress and circumferential torque, preventing deflection of the annular splice plate and ensuring the concentricity and positional accuracy of the multi-layered nested structure throughout the welding process. For the stepped groove at the bottom of the radial stepped weld, a retractable molten pool support is provided. This support extends during radial welding and moves synchronously with the welding torch, providing real-time dynamic support to the molten pool, preventing collapse, ensuring full filling and fusion of the weld, and eliminating the risk of incomplete welds.

Description

Technical Field

[0001] This invention relates to the field of welding technology, and more specifically, to an automated welding device. Background Technology

[0002] Please see Figure 1 The existing disc-shaped workpiece 100 includes a disc body 110. The upper surface of the disc body 110 is provided with a plurality of radially nested annular plates 120, and an arc-shaped weld 130 is formed between adjacent annular plates 120. The disc body 110 is uniformly provided with a plurality of radial stepped welds 140 that penetrate the annular plates 120 in the circumferential direction. A cylindrical relief groove 150 is provided at one end of the radial stepped weld 140 near the center of the disc body 110. When welding the disc-shaped workpiece 100, since the adjacent arc-shaped welds 130 have relative circumferential rotational freedom, the adjacent annular plates 120 are prone to circumferential misalignment during the welding process, affecting the concentricity and radial alignment accuracy of each annular plate 120. In addition, the bottom of the radial stepped weld 140 has a stepped groove structure. When welding it, the molten metal is prone to flow down along the groove under the action of gravity, causing the molten pool to collapse, which in turn leads to defects such as insufficient filling or lack of fusion in the radial stepped weld 140. Summary of the Invention

[0003] To overcome the above-mentioned technical problems, the present invention proposes an automated welding device.

[0004] The objective of this invention can be achieved through the following technical solutions: An automated welding device is used for welding arc-shaped welds and radial stepped welds on disc-shaped workpieces, comprising: frame; A rotary tooling unit, mounted on a frame, is used to clamp a disc-shaped workpiece and drive the disc-shaped workpiece to rotate circumferentially. The welding unit, located above the rotating tooling unit, includes a welding torch. An offset mounting plate is fitted on the welding torch. A cylindrical mounting seat adapted to a cylindrical relief groove is movably engaged on the offset mounting plate. A molten pool support adapted to a radial stepped weld is telescopically provided on the bottom side of the cylindrical mounting seat facing the welding torch. A radial sliding groove adapted to a radial stepped weld is provided at the lower end of the cylindrical mounting seat. The lifting unit, which is mounted on the frame and located on one side of the rotating tooling unit, is used to drive the welding unit to move up and down. The radial feed unit, which is connected to the lifting unit, is used to drive the welding unit to move radially along the radial stepped weld seam.

[0005] As a further aspect of the present invention: a T-shaped slot is provided on the offset mounting plate, and a T-shaped block is provided at the upper end of the cylindrical mounting base to slide and adapt to the T-shaped slot.

[0006] As a further aspect of the present invention: the bottom of the cylindrical mounting base is provided with a receiving cavity for accommodating the molten pool support component, the molten pool support component includes a molten pool support plate adapted to the receiving cavity, a plurality of multi-stage telescopic rods are connected between the molten pool support plate and the receiving cavity, and springs are sleeved on the multi-stage telescopic rods; a receiving drive component connected to the molten pool support plate is provided inside the cylindrical mounting base.

[0007] As a further aspect of the present invention: the storage drive component includes a cavity formed in a cylindrical mounting base and a storage motor fixedly installed in the cavity. The output end of the storage motor is connected to a drum, and a pull strip connected to the molten pool support plate is wound on the drum.

[0008] As a further aspect of the present invention: a first guide roller and a second guide roller are respectively rotatably arranged on the upper and lower sides of the cavity. The first guide roller and the second guide roller are used to guide the pull strip, and the pull strip between the molten pool support plate and the second guide roller is in a horizontal position.

[0009] As a further aspect of the present invention: the rotary tooling unit includes a tooling table fixed on the frame, a rotary tray adapted to a disc-shaped workpiece is vertically rotatably mounted inside the tooling table, and a rotary motor for driving the rotary tray is mounted on one side of the tooling table.

[0010] As a further embodiment of the present invention: the lifting unit includes a vertical support frame fixed to the frame, a vertical guide rail is vertically installed on the vertical support frame, a lifting platform is slidably installed on the vertical guide rail, a lifting motor is fixedly installed on the top of the vertical support frame, a lifting screw is connected to the output end of the lifting motor, and the lifting screw is threadedly connected to the lifting platform; the radial feed unit is disposed on the lifting platform.

[0011] As a further aspect of the present invention: the radial feed unit includes a horizontally distributed transverse support frame, a transverse guide rail that is horizontally fixed on the transverse support frame and slidably connected to the lifting platform, a radial feed motor that is fixedly installed on the lifting platform, a gear that is provided at the output end of the radial feed motor, and a rack that meshes with the gear that is provided on the transverse support frame; the welding unit is located at the end of the transverse support frame away from the lifting unit.

[0012] As a further aspect of the present invention, it also includes a welding torch oscillation unit, wherein the welding torch oscillation unit includes an oscillation drive component disposed on a radial feed unit, the output end of the oscillation drive component is connected to a mounting bracket, and the welding torch is mounted on the mounting bracket.

[0013] As a further embodiment of the present invention: the swing drive component includes a connecting plate fixed to the radial feed unit, a swing slide rail horizontally arranged on the connecting plate, a swing slide table slidably mounted on the swing slide rail, and a mounting bracket fixed on the swing slide table; a swing motor is also fixedly mounted on the connecting plate, an eccentric swing rod is connected to the output end of the swing motor, a sliding pin is fixed to the end of the eccentric swing rod away from the output shaft of the swing motor, a lever is fixed to the upper end of the swing slide table, and a through groove adapted to the sliding pin is vertically opened in the lever.

[0014] The beneficial effects of this invention are: When welding arc-shaped welds, a cylindrical mounting base and a molten pool support embedded in the radial stepped weld are used to form a circumferential limiting constraint on the annular panels on both sides of the arc-shaped weld being welded. The detachable structure of the offset mounting plate and the cylindrical mounting base ensures that the limiting structure can still be firmly locked in the radial stepped weld when the welding torch is welding circumferentially. This effectively counteracts the welding stress and the circumferential torque generated when the rotating tooling unit is driven, thereby avoiding relative deflection between adjacent annular panels and ensuring the concentricity and positional accuracy of the multi-layer nested annular panels throughout the welding process. To address the structural feature of stepped grooves at the bottom of radial stepped welds, a retractable molten pool support is installed. During radial welding, the molten pool support extends and embeds into the bottom of the weld, moving radially synchronously with the welding torch. This provides real-time dynamic support for the high-temperature molten pool, effectively preventing it from collapsing under gravity. This ensures sufficient filling and fusion of the weld metal and eliminates the risk of incomplete welding caused by collapse. Attached Figure Description

[0015] The invention will now be further described with reference to the accompanying drawings.

[0016] Figure 1 This is a schematic diagram of the structure of an existing disc-shaped workpiece; Figure 2 This is a three-dimensional schematic diagram of the present invention; Figure 3 This is a three-dimensional schematic diagram from another perspective of the present invention; Figure 4 This is a schematic diagram of the welding unit in this invention; Figure 5 This is a partial cross-sectional view of the welding unit in this invention; Figure 6 This is a schematic diagram of the rotating tooling unit in this invention; Figure 7 This is a schematic diagram of the radial feed unit in this invention; Figure 8 This is a schematic diagram of the welding torch oscillation unit in this invention; Figure 9This is a schematic diagram of the structure of the swing drive component in this invention.

[0017] In the picture: 100. Disc-shaped workpiece; 110. Disc body; 120. Annular panel; 130. Arc-shaped weld; 140. Radial stepped weld; 150. Cylindrical relief groove; 200. Rack; 300. Rotary tooling unit; 310. Tooling table; 320. Rotary pallet; 330. Rotary motor; 400. Lifting unit; 410. Vertical support frame; 420. Vertical guide rail; 430. Lifting platform; 440. Lifting motor; 450. Lifting screw; 500. Radial feed unit; 510. Transverse support frame; 520. Transverse guide rail; 530. Radial feed motor; 540. Gear; 550. Rack; 600. Welding torch oscillation unit; 610. Oscillation drive component; 611. Connecting plate; 612. Oscillation slide rail; 613. Oscillation slide table; 614. Pulley; 615. Through slot; 616. Oscillation motor; 617. Eccentric swing arm; 618. Sliding pin; 620. Mounting bracket; 700 Welding unit; 710 Welding torch; 720 Offset mounting plate; 721 T-shaped slot; 730 Cylindrical mounting base; 731 T-shaped block; 732 Radial groove; 733 Receiving cavity; 740 Molten pool support; 741 Molten pool support plate; 742 Multi-stage telescopic rod; 743 Spring; 750 Receiving drive component; 751 Cavity; 752 Receiving motor; 753 Drum; 754 First guide roller; 755 Second guide roller; 756 Pull belt. Detailed Implementation

[0018] The subject matter described herein will now be discussed with reference to exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and implement the subject matter described herein, and changes may be made to the function and arrangement of the elements discussed without departing from the scope of this specification. Various processes or components may be omitted, substituted, or added as needed in the examples. Furthermore, features described in some examples may be combined in other examples.

[0019] Please see Figure 2 and Figure 3The present invention discloses an automated welding equipment for welding arc welds 130 and radial stepped welds 140 on a disc-shaped workpiece 100. The equipment includes a frame 200, a rotating fixture unit 300, a lifting unit 400, a radial feed unit 500, and a welding unit 700. The rotating fixture unit 300 is mounted on the frame 200 and is used to clamp the disc-shaped workpiece 100 and drive the disc-shaped workpiece 100 to rotate circumferentially. Please see Figure 4 The welding unit 700 is located above the rotating tooling unit 300 and includes a welding torch 710. An offset mounting plate 720 is sleeved on the welding torch 710. A cylindrical mounting seat 730 adapted to the cylindrical relief groove 150 is movably engaged on the offset mounting plate 720. A molten pool support member 740 adapted to the radial stepped weld 140 is telescopically provided on the side of the bottom of the cylindrical mounting seat 730 facing the welding torch 710. A radial sliding groove 732 adapted to the radial stepped weld 140 is opened at the lower end of the cylindrical mounting seat 730. The lifting unit 400 is mounted on the frame 200 and located on one side of the rotating tooling unit 300, and is used to drive the welding unit 700 to move up and down; the radial feed unit 500 is connected to the lifting unit 400 and is used to drive the welding unit 700 to move radially along the radial stepped weld 140. Specifically, the disc body 110 is clamped and fixed on the rotating tooling unit 300, and then each annular splice plate 120 is nested and spliced ​​onto the disc body 110 in sequence, so that each radial stepped weld 140 is radially aligned. The rotating tooling unit 300 drives the disc body 110 and each annular splice plate 120 above it to rotate until one of the radial stepped welds 140 is aligned with the radial feed unit 500 and located directly below the welding torch 710. At this time, the molten pool support 740 is in the extended state and located directly below the welding torch 710. Then, the lifting unit 400 drives the welding torch 710 to move downward until the lower end of the cylindrical mounting base 730 moves to the opening of the radial stepped weld 140 away from the cylindrical relief groove 150. Next, the radial feed unit 500 drives the welding torch 710 to move radially along the extension direction of the radial stepped weld 140, causing the lower end of the cylindrical mounting base 730 and the molten pool support 740 to engage within the radial stepped weld 140 and slide radially along the radial stepped weld 140 until the welding torch 710 moves directly above the outermost arc weld 130. The welding torch 710 is then activated, and simultaneously, the rotating tooling unit 300 drives the disc-shaped workpiece 100 to rotate circumferentially at a uniform speed. The welding torch 710 can then be used to perform circumferential welding on the outermost arc weld 130. During the welding of the arc weld 130, the offset mounting plate 720 is temporarily separated from the cylindrical mounting base 730. The cylindrical mounting base 730 and the molten pool support 740 embedded in the radial stepped weld 140 provide circumferential positioning for the annular splice plates 120 on both sides of the welded arc weld 130. This avoids circumferential deflection of the two sets of annular plates 120 during the welding of the arc weld 130. When the disc-shaped workpiece 100 rotates one revolution relative to the welding torch 710, the outermost arc weld 130 is completed. Then, the radial feed unit 500 drives the welding unit 700 to move radially inward along the radial stepped weld 140 for a certain distance, which is the distance between adjacent arc welds 130. The next arc weld 130 can then be welded until all arc welds 130 are completed. The radial feed unit 500 drives the cylindrical mounting base 730 to move into the cylindrical relief groove 150, and the molten pool support 740 retracts into the cylindrical mounting base 730. Then, the lifting unit 400 drives the welding torch 710 to rise, and the cylindrical mounting base 730 can be removed from the radial stepped weld 140. After all the arc welds 130 are completed, the cylindrical mounting base 730 is moved again to the opening of one of the radial stepped welds 140 away from the cylindrical relief groove 150. At this time, the molten pool support 740 extends, the welding torch 710 is turned on, and the rotating tooling unit 300 is paused. The welding torch 710 is driven to move radially and uniformly along the radial stepped weld 140 through the radial feed unit 500. The molten pool support 740 moves synchronously with the welding torch 710, thus performing radial welding on the radial stepped weld 140. The molten pool support 740, embedded at the bottom of the radial stepped weld 140, tracks and supports the molten pool above. To prevent the molten pool from collapsing; until the cylindrical mounting base 730 moves to the cylindrical relief groove 150, the radial stepped weld 140 is completed. Then, the molten pool support 740 is retracted into the cylindrical mounting base 730, and the lifting unit 400 drives the welding torch 710 upward to remove the cylindrical mounting base 730 from the cylindrical relief groove 150. Then, the rotating tooling unit 300 drives the disc-shaped workpiece 100 to rotate at a certain angle, which is the included angle between adjacent radial stepped welds 140. Repeat the above steps to perform radial welding on the next group of radial stepped welds 140 until all radial stepped welds 140 are completed.

[0020] It should be noted that when welding the arc weld 130, the cylindrical mounting base 730 and the molten pool support 740 embedded in the radial stepped weld 140 form a circumferential limiting constraint on the annular plates 120 on both sides of the arc weld 130 being welded. The detachable structure of the offset mounting plate 720 and the cylindrical mounting base 730 ensures that the limiting structure can still be firmly locked in the radial stepped weld 140 when the welding torch 710 is welding in the circumferential direction. This effectively counteracts the welding stress and the circumferential torque generated when the rotating tooling unit 300 is driven, thereby avoiding relative deflection between adjacent annular plates 120 and ensuring the concentricity and positional accuracy of the multi-layer nested annular plates 120 throughout the welding process. In response to the structural feature of the stepped groove at the bottom of the radial stepped weld 140, a retractable molten pool support 740 is provided. During radial welding, the molten pool support 740 is in an extended state and embedded in the bottom of the weld, moving radially synchronously with the welding torch 710 to provide real-time dynamic support for the high-temperature molten pool. This effectively prevents the molten pool from collapsing under gravity, ensuring sufficient filling and fusion of the weld metal and eliminating the risk of incomplete welding caused by collapse. By precisely matching the cylindrical mounting base 730 with the radial stepped weld 140 and the cylindrical relief groove 150, it combines the anti-deflection limiting function of the arc weld 130 and the anti-collapse support function of the radial stepped weld 140. By simply switching the extension and retraction state of the molten pool support 740, starting and stopping the rotary tooling unit 300, and stepping the radial feed unit 500, the circumferential welding of all arc welds 130 and the radial welding of all radial stepped welds 140 can be completed continuously, which greatly shortens the auxiliary time and improves the overall processing efficiency and consistency. During the welding process, the cylindrical mounting base 730 maintains sliding contact with the radial stepped weld 140, which not only serves as a limit but also increases the overall rigidity of the workpiece in the welding heat input area. This effectively suppresses the wave deformation and warping of the thin-walled annular panel 120 caused by the welding heat cycle. Combined with the stepping control of the radial feed unit 500, the weld beads of each layer of arc weld 130 are evenly distributed, improving the overall structural strength and yield of the disc-shaped workpiece 100.

[0021] In one embodiment, please refer to Figure 4 and Figure 5 The offset mounting plate 720 is provided with a T-shaped slot 721, and the cylindrical mounting base 730 is provided with a T-shaped block 731 that is slidably adapted to the T-shaped slot 721 at its upper end; Specifically, when welding the arc-shaped weld 130, the rotary tooling unit 300 drives the disc-shaped workpiece 100 to rotate circumferentially. Since the lower end of the cylindrical mounting base 730 is stuck in the corresponding radial stepped weld 140, the cylindrical mounting base 730 is forced to separate from the offset mounting plate 720, and the T-shaped locking block 731 slides out of the T-shaped slot 721. When the disc-shaped workpiece 100 rotates one revolution, the T-shaped locking block 731 is stuck back into the T-shaped slot 721, thereby realizing the connection between the cylindrical mounting base 730 and the offset mounting plate 720, so that the cylindrical mounting base 730 can be pushed radially by the welding torch 710 in the future.

[0022] It is worth noting that during the welding process of the arc weld 130, when the rotating tooling unit 300 drives the disc-shaped workpiece 100 to rotate circumferentially, the cylindrical mounting base 730 remains relatively stationary with the disc-shaped workpiece 100 because it is stuck in the radial stepped weld 140. The T-shaped locking block 731 automatically slides out from the T-shaped locking groove 721, ensuring that the welding torch 710 can achieve continuous and unobstructed circumferential welding along the arc weld 130, thereby improving the stability of the welding process and the quality of the weld bead formation. After the disc-shaped workpiece 100 completes one revolution to finish welding the current arc weld 130, the T-shaped locking block 731 resets and re-engages into the T-shaped slot 721, automatically restoring the connection between the cylindrical mounting base 730 and the offset mounting plate 720. This provides a structural basis for the subsequent radial feed unit 500 to drive the welding torch 710 and the cylindrical mounting base 730 to move radially synchronously.

[0023] Further, please refer to Figure 5 The cylindrical mounting base 730 has a receiving cavity 733 at its bottom for accommodating the molten pool support 740. The molten pool support 740 includes a molten pool support plate 741 adapted to the receiving cavity 733. A plurality of multi-stage telescopic rods 742 are connected between the molten pool support plate 741 and the receiving cavity 733. Springs 743 are sleeved on the multi-stage telescopic rods 742. A receiving drive component 750 connected to the molten pool support plate 741 is provided inside the cylindrical mounting base 730. Specifically, in the initial state, due to the elastic force of the spring 743, the multi-stage telescopic rod 742 is in the extended state, thereby pushing the molten pool support plate 741 out of the receiving cavity 733, thus using the extended molten pool support plate 741 for circumferential limiting and molten pool support; when the welding process is completed, after the cylindrical mounting base 730 moves into the cylindrical relief groove 150, the molten pool support plate 741 is pulled by the receiving drive component 750, so that the molten pool support plate 741 can be retracted into the receiving cavity 733. At the same time, the multi-stage telescopic rod 742 retracts and folds, and the spring 743 is compressed until the molten pool support plate 741 is completely retracted into the receiving cavity 733, so that the cylindrical mounting base 730 can be moved vertically upward from the cylindrical relief groove 150.

[0024] It is worth noting that in the initial state, the spring 743 automatically pushes out the multi-stage telescopic rod 742 by its own elastic force, so that the molten pool support plate 741 extends out of the receiving cavity 733. It can automatically enter the working position before welding begins, ensuring the real-time tracking and support capability of the molten pool support plate 741 for the bottom of the radial stepped weld 140, as well as the reliable circumferential limit of the two annular splice plates 120 on both sides when welding the arc weld 130. When the multi-stage telescopic rod 742 is extended, it ensures that the molten pool support plate 741 is located directly below the welding torch 710, thereby achieving effective dynamic following support of the molten pool. When retracted, the multi-stage telescopic rod 742 significantly shortens its axial length through a multi-stage nested structure, and with the compression of the spring 743, the molten pool support plate 741 can be completely concealed within the storage cavity 733 of the cylindrical mounting base 730. After welding is completed, when the cylindrical mounting base 730 moves into the cylindrical relief groove 150, the storage drive component 750 actively pulls the molten pool support plate 741, overcoming the elastic force of the spring 743 to retract it into the storage cavity 733. This ensures that when the cylindrical mounting base 730 needs to be moved vertically upward from the cylindrical relief groove 150, the molten pool support plate 741 will not interfere with the side wall of the relief groove or the workpiece, thus avoiding the risk of jamming during forced removal.

[0025] Furthermore, please refer to Figure 5 The storage drive component 750 includes a cavity 751 opened in a cylindrical mounting base 730 and a storage motor 752 fixedly installed in the cavity 751. The output end of the storage motor 752 is connected to a drum 753, and a pull strap 756 connected to the molten pool support plate 741 is wound on the drum 753. The cavity 751 is also rotatably provided with a first guide roller 754 and a second guide roller 755 on the upper and lower sides respectively. The first guide roller 754 and the second guide roller 755 are used to guide the pull strip 756. The pull strip 756 between the molten pool support plate 741 and the second guide roller 755 is in a horizontal position.

[0026] Specifically, when the molten pool tray 741 needs to be stored, the storage motor 752 drives the drum 753 to rotate, thereby winding the pull belt 756, so that the molten pool tray 741 can be gradually pulled back into the storage cavity 733; the second guide roller 755 and the first guide roller 754 guide the pull belt 756 to avoid interference between the pull belt 756 and the internal space of the storage cavity 733.

[0027] It should be noted that the winding drum 753 driven by the winding motor 752 actively winds up the pull belt 756, ensuring that the molten pool support plate 741 can be stably wound back into the storage cavity 733 after welding. The first guide roller 754 and the second guide roller 755 set on the upper and lower sides of the cavity 751 form multi-point guidance and support for the pull belt 756, so that the pull belt 756 always maintains smooth movement during winding and unwinding, effectively avoiding friction, jamming or entanglement between the pull belt 756 and the internal structure of the storage cavity 733 and the inner wall of the cylindrical mounting base 730. The arrangement of the second guide roller 755 ensures that the pull belt 756 between the molten pool support plate 741 and the second guide roller 755 is in a horizontal position. This ensures that the direction of the tension applied by the pull belt 756 to the molten pool support plate 741 is basically consistent with its retraction direction, eliminating the additional bending moment caused by the skewed tension. This prevents the molten pool support plate 741 from getting stuck, tilting, or experiencing abnormal friction with the inner wall of the receiving cavity 733 during the recovery process, thereby ensuring the smoothness and positional accuracy of the molten pool support plate 741 recovery.

[0028] In yet another embodiment, please refer to Figure 6 The rotary tooling unit 300 includes a tooling table 310 fixed on the frame 200. A rotary tray 320 adapted to the disc-shaped workpiece 100 is vertically rotatably mounted inside the tooling table 310. A rotary motor 330 for driving the rotary tray 320 is mounted on one side of the tooling table 310. Specifically, the disc body 110 of the disc-shaped workpiece 100 is coaxially clamped on the rotating tray 320, and the rotating tray 320 can be driven to rotate by the rotating motor 330, thereby driving the entire disc-shaped workpiece 100 to rotate circumferentially.

[0029] Further, please refer to Figure 3 The lifting unit 400 includes a vertical support frame 410 vertically fixed to the frame 200, a vertical guide rail 420 vertically mounted on the vertical support frame 410, a lifting platform 430 slidably mounted on the vertical guide rail 420, a lifting motor 440 fixedly mounted on the top of the vertical support frame 410, a lifting screw 450 connected to the output end of the lifting motor 440, and the lifting screw 450 threadedly connected to the lifting platform 430; the radial feed unit 500 is disposed on the lifting platform 430. Please see Figure 7The radial feed unit 500 includes a horizontally distributed transverse support frame 510. A transverse guide rail 520 that is slidably connected to the lifting platform 430 is horizontally fixed on the transverse support frame 510. A radial feed motor 530 is fixedly installed on the lifting platform 430. A gear 540 is provided at the output end of the radial feed motor 530. A rack 550 that meshes with the gear 540 is provided on the transverse support frame 510. The welding unit 700 is located at the end of the transverse support frame 510 away from the lifting unit 400. Specifically, by driving the lifting screw 450 to rotate through the lifting motor 440, the lifting platform 430 can be moved up and down along the vertical guide rail 420, thereby realizing the lifting movement of the welding unit 700; by driving the gear 540 to rotate through the radial feed motor 530, the meshing transmission between the gear 540 and the rack 550 can be used to drive the transverse support frame 510 to move laterally relative to the lifting platform 430, thereby realizing the radial feed of the welding unit 700.

[0030] It is worth noting that in the lifting unit 400, the lifting motor 440 drives the lifting screw 450 to rotate, which, together with the vertical guide rail 420, guides the lifting platform 430, realizing the precise displacement of the welding unit 700 in the vertical direction. The screw transmission mechanism itself has good self-locking characteristics. After the lifting motor 440 stops, the weight of the lifting platform 430 and the radial feed unit 500 above and the welding unit 700 will not cause automatic sliding, ensuring that the welding torch 710 and the cylindrical mounting base 730 are stable in the height direction during the welding process, providing a reliable height reference for the precise fit between the molten pool support 740 and the bottom of the radial stepped weld 140. The radial feed unit 500 uses a radial feed motor 530 to drive the gear 540 and rack 550 to mesh, pushing the transverse support frame 510 to move horizontally along the transverse guide rail 520. Compared with the screw drive, the gear and rack structure has higher transmission rigidity and smaller cumulative error under long stroke conditions, which can meet the requirements of large-range radial movement from the center of the disc 110 to the outer edge. At the same time, this transmission method responds quickly. Combined with the welding speed requirements of the radial stepped weld 140, it can achieve a smooth and uniform radial welding motion, ensuring the uniformity of the weld bead of the radial stepped weld 140.

[0031] In further embodiments, please refer to Figure 8 It also includes a welding torch oscillation unit 600, which includes an oscillation drive 610 disposed on a radial feed unit 500. The output end of the oscillation drive 610 is connected to a mounting bracket 620, and the welding torch 710 is mounted on the mounting bracket 620. Specifically, during the welding of the radial stepped weld 140, the welding torch 710 is driven to move radially along the radial stepped weld 140 by the radial feed unit 500, while the mounting bracket 620 and the welding torch 710 are driven to swing synchronously by the swing drive 610. The swing direction is perpendicular to the feed direction of the welding torch 710, so that the welding range of the welding torch 710 can effectively cover the entire opening width of the radial stepped weld 140, thereby forming a fish-scale weld that completely covers the radial stepped weld 140 and avoiding the formation of incomplete welds.

[0032] It should be noted that the radial stepped weld 140 has a specific opening width. If the welding torch 710 moves only in a straight line along the center of the weld, the fusion of the bevels on both sides is likely to occur. By using the swing drive 610 to drive the welding torch 710 to swing back and forth in a direction perpendicular to the feed direction, the arc and droplet coverage area can be effectively extended to the entire opening width of the weld, ensuring that the base material on both sides of the weld is fully fused and the wide weld is completely filled in one go, thus fundamentally avoiding the defect of false welding caused by incomplete coverage. The welding torch 710 moves radially while simultaneously oscillating periodically, causing the molten pool to form a regularly arranged fish-scale pattern during solidification. The weld shape is not only aesthetically pleasing, but more importantly, it exhibits full interlayer fusion and a dense structure, which improves the mechanical properties and sealing performance of the radial stepped weld 140. Compared to the narrow weld bead formed by straight welding, the fish-scale weld exhibits superior crack resistance when subjected to alternating loads and thermal stress. During the oscillating welding process, the reciprocating movement of the electric arc promotes the dynamic wetting and filling of the stepped groove area at the bottom of the radial stepped weld 140 by the molten metal. Combined with the real-time lifting of the molten pool from the bottom by the molten pool support 740, the two form a coordinated mechanism of upper oscillation and lower support. The oscillation of the welding torch 710 ensures full coverage in the width direction of the upper weld, while the molten pool support 740 prevents the molten pool from collapsing at the stepped structure. Together, they ensure that the radial stepped weld 140 is fully filled and defect-free welded under complex cross-sectional shapes. In actual production, after the annular panel 120 is nested and assembled, the bevel width of the radial stepped weld 140 may fluctuate to some extent. The active oscillation of the welding torch 710 enables the welding range to be dynamically adjusted. Even if there is a slight deviation between the center line of the welding torch 710 and the center of the weld, the oscillation range can still cover the entire bevel area, reducing the stringent requirements on the assembly accuracy of the workpiece and the positioning accuracy of the tooling, and improving the robustness of the welding process and the yield.

[0033] Further, please refer to Figure 9The swing drive component 610 includes a connecting plate 611 fixed to the radial feed unit 500. A swing slide rail 612 is horizontally arranged on the connecting plate 611. A swing slide table 613 is slidably mounted on the swing slide rail 612. The mounting bracket 620 is fixed on the swing slide table 613. A swing motor 616 is also fixedly mounted on the connecting plate 611. An eccentric swing rod 617 is connected to the output end of the swing motor 616. A sliding pin 618 is fixed to the end of the eccentric swing rod 617 away from the output shaft of the swing motor 616. A lever block 614 is fixed to the upper end of the swing slide table 613. A through groove 615 adapted to the sliding pin 618 is vertically opened in the lever block 614. Specifically, by driving the eccentric rocker arm 617 to rotate circumferentially through the rocker motor 616, the lever 614 can be driven to reciprocate left and right under the matching action of the sliding pin 618 and the through groove 615, thereby driving the rocker slide table 613 to reciprocate along the rocker slide rail 612, so as to achieve the reciprocating swing effect of the welding torch 710.

[0034] It should be noted that the oscillating motor 616 drives the eccentric rocker arm 617 to rotate circumferentially. Through the sliding engagement of the sliding pin 618 and the vertical through groove 615 in the lever block 614, the circular motion is directly converted into the reciprocating linear motion of the oscillating slide table 613 along the oscillating slide rail 612. The swing amplitude of the welding torch 710 is determined by the eccentricity of the eccentric rocker arm 617. By setting the corresponding eccentricity of the eccentric rocker arm 617, the swing width of the welding torch 710 can be adjusted accordingly. This allows the welding system to accurately match the swing amplitude according to the actual opening width of the radial stepped weld 140, ensuring that the coverage area of ​​the welding torch 710 just fills the weld bevel, avoiding incomplete fusion of the sidewall due to insufficient swing amplitude or energy dispersion due to excessive swing amplitude.

[0035] The specific embodiments of the present invention have been described above. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention, all of which are within the protection scope of the present invention.

Claims

1. An automated welding equipment, applied to the welding of arc-shaped weld seams (130) and radial stepped weld seams (140) on a disc-shaped workpiece (100), characterized in that, include: Rack (200); A rotary tooling unit (300) is mounted on a frame (200) for clamping a disc-shaped workpiece (100) and driving the disc-shaped workpiece (100) to rotate circumferentially; The welding unit (700), located above the rotating tooling unit (300), includes a welding torch (710). An offset mounting plate (720) is fitted on the welding torch (710). A cylindrical mounting seat (730) adapted to a cylindrical relief groove (150) is movably engaged on the offset mounting plate (720). A molten pool support member (740) adapted to a radial stepped weld (140) is telescopically provided on the side of the bottom of the cylindrical mounting seat (730) facing the welding torch (710). A radial groove (732) adapted to a radial stepped weld (140) is opened at the lower end of the cylindrical mounting seat (730). A lifting unit (400) is mounted on the frame (200) and located on one side of the rotating tooling unit (300) for driving the welding unit (700) to move up and down; A radial feed unit (500), which is connected to a lifting unit (400), is used to drive the welding unit (700) to move radially along the radial stepped weld (140).

2. The automated welding equipment according to claim 1, characterized in that, The offset mounting plate (720) has a T-shaped slot (721), and the upper end of the cylindrical mounting base (730) is provided with a T-shaped block (731) that is slidably adapted to the T-shaped slot (721).

3. The automated welding equipment according to claim 1, characterized in that, The cylindrical mounting base (730) has a receiving cavity (733) at the bottom for accommodating the molten pool support (740). The molten pool support (740) includes a molten pool support plate (741) adapted to the receiving cavity (733). A plurality of multi-stage telescopic rods (742) are connected between the molten pool support plate (741) and the receiving cavity (733). Springs (743) are sleeved on the multi-stage telescopic rods (742). A receiving drive component (750) connected to the molten pool support plate (741) is provided inside the cylindrical mounting base (730).

4. The automated welding equipment according to claim 3, characterized in that, The storage drive (750) includes a cavity (751) opened in a cylindrical mounting base (730) and a storage motor (752) fixedly installed in the cavity (751). The output end of the storage motor (752) is connected to a drum (753), and a pull belt (756) connected to the molten pool support plate (741) is wound on the drum (753).

5. An automated welding equipment according to claim 4, characterized in that, The cavity (751) is also rotatably provided with a first guide roller (754) and a second guide roller (755) on the upper and lower sides respectively. The first guide roller (754) and the second guide roller (755) are used to guide the pull strip (756). The pull strip (756) between the molten pool support plate (741) and the second guide roller (755) is in a horizontal position.

6. The automated welding equipment according to claim 1, characterized in that, The rotary tooling unit (300) includes a tooling table (310) fixed on the frame (200), and a rotary tray (320) adapted to the disc-shaped workpiece (100) is vertically rotatably mounted in the tooling table (310). A rotary motor (330) for driving the rotary tray (320) is mounted on one side of the tooling table (310).

7. The automated welding equipment according to claim 1, characterized in that, The lifting unit (400) includes a vertical support frame (410) fixed vertically on the frame (200), a vertical guide rail (420) is vertically mounted on the vertical support frame (410), a lifting platform (430) is slidably mounted on the vertical guide rail (420), a lifting motor (440) is fixedly mounted on the top of the vertical support frame (410), a lifting screw (450) is connected to the output end of the lifting motor (440), and the lifting screw (450) is threadedly connected to the lifting platform (430); the radial feed unit (500) is disposed on the lifting platform (430).

8. An automated welding equipment according to claim 7, characterized in that, The radial feed unit (500) includes a horizontally distributed transverse support frame (510), on which a transverse guide rail (520) is horizontally fixed and slidably connected to the lifting platform (430). A radial feed motor (530) is fixedly installed on the lifting platform (430), and a gear (540) is provided at the output end of the radial feed motor (530). A rack (550) meshing with the gear (540) is provided on the transverse support frame (510). The welding unit (700) is located at one end of the transverse support frame (510) away from the lifting unit (400).

9. An automated welding equipment according to claim 1, characterized in that, It also includes a welding torch oscillation unit (600), which includes an oscillation drive (610) disposed on a radial feed unit (500), and the output end of the oscillation drive (610) is connected to a mounting bracket (620), and the welding torch (710) is mounted on the mounting bracket (620).

10. An automated welding equipment according to claim 9, characterized in that, The swing drive (610) includes a connecting plate (611) fixed on the radial feed unit (500), a swing slide rail (612) horizontally arranged on the connecting plate (611), a swing slide table (613) slidably mounted on the swing slide rail (612), and a mounting bracket (620) fixed on the swing slide table (613). A swing motor (616) is also fixedly mounted on the connecting plate (611), an eccentric swing rod (617) is connected to the output end of the swing motor (616), a sliding pin (618) is fixed to the end of the eccentric swing rod (617) away from the output shaft of the swing motor (616), and a lever (614) is fixed to the upper end of the swing slide table (613). A through groove (615) adapted to the sliding pin (618) is vertically opened in the lever (614).

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