A welding device for metal

Abstract

The application discloses a welding device for metal, and relates to the technical field of metal welding, which comprises a supporting unit including a supporting part, a fixed clamping unit including a clamping rotating assembly arranged on the supporting part and a fixed assembly arranged on the clamping rotating assembly, and the fixed assembly is connected with the supporting part. In the laser welding process of the metal steel pipe, the welding wire is preheated by the conveying assembly, and the conveying speed of the welding wire is adjusted in real time by the control assembly, so that the air welding at high temperature and the accumulation of the welding wire at low temperature are avoided, the welding cracks and the secondary welding demand are reduced, the firm clamping of the steel pipe is realized by the cooperation of the rotating horizontal plate and the supporting ring of the clamping rotating assembly, the welding shaking is reduced, the welding deviation is avoided, the welding precision is improved, meanwhile, the automatic control of the whole welding process reduces the manual intervention, the welding efficiency and consistency are further improved, and the production cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of metal welding technology, and more particularly to a metal welding apparatus. Background Technology

[0002] Laser welding is a highly efficient and precise welding method that uses a high-energy-density laser beam as a heat source. It features fast welding speed, high weld aesthetics, and excellent welding results. In the process of welding metal steel pipes, welding wire needs to be added inside the laser welding equipment to perform laser welding, which is faster than traditional welding methods.

[0003] Currently, there are two main problems in the laser welding process of metal steel pipes: First, the welding temperature and wire feeding rate are mismatched. At high temperatures, the welding rate increases and the melting area increases, which increases the demand for welding wire and easily leads to blank welding. At low temperatures, the welding wire accumulates, the weld spot is too large, and it may even cause welding cracks, thus requiring secondary welding. Second, the welding clamping and rotating device is prone to shaking when operating at large angles, which causes the steel pipe to deviate during welding. These problems affect the welding quality and increase production costs and time. Summary of the Invention

[0004] In view of the problems existing in the above-mentioned metal welding apparatus, the present invention is proposed.

[0005] Therefore, the present invention provides a metal welding device, the purpose of which is to solve the problems of mismatch between welding temperature and wire feeding rate, resulting in blank welding, wire accumulation and excessively large weld points at low temperatures, which cause welding cracks and require secondary welding, and the welding clamping and rotating device is prone to shaking when operating at large angles, resulting in steel pipe welding deviation.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a support unit, including a support portion;

[0007] The fixed clamping unit includes a clamping rotation assembly disposed on a support portion and a fixing assembly disposed on the clamping rotation assembly, wherein the fixing assembly is connected to the support portion;

[0008] The welding unit includes a movable welding frame disposed on top of the clamping and rotating assembly, a laser welding machine disposed on the movable welding frame, a conveying assembly disposed on the laser welding machine, and a control assembly disposed inside the conveying assembly.

[0009] As a preferred embodiment of the metal welding apparatus of the present invention, the clamping rotating assembly includes a double-headed motor disposed on the support, a transmission rod disposed on the output end of the double-headed motor, a rotating wheel disposed on the other end of the transmission rod, a belt disposed on the outer diameter of the rotating wheel, a driven wheel disposed on the other end of the belt, a rotating horizontal plate disposed on one side of the driven wheel, and a support ring rotatably disposed on the outer diameter of the rotating horizontal plate, wherein the bottom of the support ring is connected to the support.

[0010] In a preferred embodiment of the metal welding apparatus of the present invention, an L-shaped moving block is slidably arranged inside the rotating horizontal plate, and a clamping member is provided at the other end of the L-shaped moving block, and the clamping member is slidably connected to the rotating horizontal plate.

[0011] In a preferred embodiment of the metal welding apparatus of the present invention, the inner diameter of the support ring is provided with a stepped ring, and the stepped ring is slidably connected to the L-shaped moving block.

[0012] As a preferred embodiment of the metal welding apparatus of the present invention, the fixing component includes a fixing block disposed on the support, a movable member disposed on the fixing block, an electric push rod disposed on the top of the movable member, a sliding block disposed on the output end of the electric push rod, an L-shaped connecting rod disposed on the sliding block, and a fixing ring disposed at the bottom of the L-shaped connecting rod.

[0013] In a preferred embodiment of the metal welding device of the present invention, a second fixing ring is provided at the bottom of the fixing block, and the second fixing ring is connected to the support.

[0014] As a preferred embodiment of the metal welding apparatus of the present invention, the conveying assembly includes an outer casing disposed at one end of the laser welding machine, a top plate slidably disposed inside the outer casing, a mounting plate disposed on the top plate, a fixing column disposed on the mounting plate, and a guide member disposed on the outer diameter of the fixing column, wherein the guide member is connected to the mounting plate, and a welding wire body is disposed at one end of the mounting plate, wherein the welding wire body is slidably connected to the guide member.

[0015] As a preferred embodiment of the metal welding apparatus of the present invention, an S-groove heating plate is provided inside the outer casing, and the S-groove heating plate is slidably connected to the welding wire body. A guide tube is provided inside the outer casing, and the guide tube is connected to the laser welding machine through and fixedly connected.

[0016] As a preferred embodiment of the metal welding apparatus of the present invention, the control component includes a partition plate disposed inside the outer casing, a connector disposed on the partition plate and disposed at the output end of the electric push rod, a conical mounting bracket disposed at the other end of the connector, a friction ball rotatably disposed inside the conical mounting bracket, and a conical placement component disposed at the bottom of the friction ball.

[0017] In a preferred embodiment of the metal welding apparatus of the present invention, the bottom of the conical placement piece is provided with a protective shell, and the protective shell is connected to the dividing plate. The bottom of the protective shell is provided with a guide shell, and the inside of the guide shell is provided with a straightening roller, which is slidably connected to the welding wire body.

[0018] The beneficial effects of this invention are as follows: In the laser welding process of metal steel pipes, the welding wire is preheated by the conveying component, and the welding wire conveying speed is adjusted in real time by the control component, avoiding dry welding at high temperatures and welding wire accumulation at low temperatures, reducing welding cracks and the need for secondary welding. The clamping and rotating component achieves firm clamping of the steel pipe through the cooperation of the rotating horizontal plate and the support ring, reducing welding sway, avoiding welding deviation, and improving welding accuracy. At the same time, the automated control of the entire welding process reduces manual intervention, further improving welding efficiency and consistency, reducing production costs, and effectively solving the problems of dry welding caused by mismatch between welding temperature and wire feeding rate, welding wire accumulation and excessively large weld points at low temperatures, which lead to welding cracks and the need for secondary welding. In addition, the welding clamping and rotating device is prone to swaying when operating at large angles, which causes welding deviation of the steel pipe. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall structure of the metal welding apparatus of the present invention.

[0021] Figure 2 This is a side view of the metal welding apparatus of the present invention.

[0022] Figure 3 This is a cross-sectional structural diagram of the metal welding apparatus of the present invention.

[0023] Figure 4 The present invention relates to a metal welding apparatus. Figure 3 A magnified structural diagram at point A.

[0024] Figure 5 The present invention relates to a metal welding apparatus. Figure 3 A magnified structural diagram at point B.

[0025] Figure 6 This is a schematic diagram of the laser unit structure of the metal welding apparatus of the present invention.

[0026] Figure 7This is a schematic cross-sectional view of the laser unit structure of the metal welding apparatus of the present invention.

[0027] Figure 8 The present invention relates to a metal welding apparatus. Figure 7 A magnified structural diagram at point C.

[0028] Figure 9 This is a cross-sectional structural diagram of the control component of the metal welding apparatus of the present invention.

[0029] Figure 10 The present invention relates to a metal welding apparatus. Figure 9 A magnified structural diagram at point D.

[0030] Explanation of reference numerals in the attached drawings: 100, Support unit; 101, Support part; 200, Fixed clamping unit; 201, Clamping rotation assembly; 2011, Dual-head motor; 2012, Transmission rod; 2013, Rotating wheel; 2014, Belt; 2015, Driven wheel; 2016, Rotating horizontal plate; 2017, L-shaped moving block; 2018, Clamping component; 2019, Support ring; 2019-1, Stepped ring; 202, Fixed assembly; 2021, Fixed block; 2022, Moving component; 2023, Sliding block; 2024, Electric push rod one; 2025, L-shaped connecting rod; 2026, Fixed retaining ring one; 2027 300. Fixed retaining ring II; 301. Welding unit; 302. Mobile welding frame; 303. Laser welding machine; 304. Conveying assembly; 305. Outer casing; 306. Top plate; 307. Mounting plate; 308. Welding wire body; 309. Guide component; 300. Fixed column; 300. S-groove heating plate; 301. Guide tube; 302. Control assembly; 3033. Dividing plate; 3044. Electric push rod II; 3045. Connecting component; 3046. Conical mounting frame; 3047. Friction ball; 3048. Conical placement component; 3049. Protective shell; 3040. Material guide shell; 3041. Straightening roller. Detailed Implementation

[0031] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0032] Example 1, referring to Figure 1 - Figure 3 The first embodiment of the present invention provides a metal welding apparatus, which includes a support unit 100, a fixing clamping unit 200, and a welding unit 300.

[0033] The support unit 100 includes a support part 101;

[0034] The fixed clamping unit 200 includes a clamping rotation assembly 201 disposed on the support part 101 and a fixing assembly 202 disposed on the clamping rotation assembly 201. The fixing assembly 202 is connected to the support part 101. When performing laser welding of steel pipe, the steel pipe to be welded is placed inside the fixing assembly 202. The fixing assembly 202 adjusts and fixes the steel pipe inside. At the same time, the clamping rotation assemblies 201 on both sides begin to clamp and fix the outer diameter of the steel pipe on both sides. After the clamping and fixing are completed, the steel pipe can continue to be rotated for laser welding.

[0035] The welding unit 300 includes a movable welding frame 301 mounted on top of the clamping and rotating assembly 201, a laser welding machine 302 mounted on the movable welding frame 301, a conveying assembly 303 mounted on the laser welding machine 302, and a control assembly 304 mounted inside the conveying assembly 303. During laser welding of steel pipes, the steel pipe to be welded is placed inside the fixing assembly 202. The fixing assembly 202 adjusts and fixes the steel pipe inside, while the clamping and rotating assemblies 201 on both sides clamp and fix the outer diameter of the steel pipe. The clamping and rotating assemblies 201 and the fixing assembly 202 fix and clamp the steel pipe inside. Afterwards, the movable welding frame 301 is positioned, and the laser welding machine 302 begins laser welding the steel pipe. During the laser welding process, the conveying component 303 feeds the welding wire to the laser welding machine 302. The feeding speed of the welding wire is adjusted according to the real-time welding temperature of the laser welding machine 302 to prevent the welding machine 302 from overheating, increasing the welding rate and melting area, increasing the demand for welding wire, and causing the conveying component 303 to fail to feed the welding wire in time, resulting in dry welding. It also prevents the welding wire from piling up and the weld point from being too large when the laser welding machine 302 is performing low-temperature welding, which could lead to welding cracks.

[0036] During operation, when performing laser welding on steel pipes, the steel pipe to be welded is placed inside the fixing component 202. The fixing component 202 adjusts and fixes the steel pipe inside, while the clamping and rotating components 201 on both sides clamp and fix the outer diameter of the steel pipe. After the clamping and rotating components 201 and the fixing component 202 have fixed and clamped the steel pipe inside, the moving welding frame 301 is adjusted in position, and the laser welding machine 302 begins laser welding on the steel pipe. During the laser welding process, the conveying component 303 feeds the welding wire to the laser welding machine 302, and the feeding speed of the welding wire is adjusted according to the real-time temperature of the laser welding machine 302 to prevent the laser welding machine 302 from overheating during the welding process. The increased welding speed and melting area lead to a greater demand for welding wire. The conveying component 303 prevents untimely wire feeding, thus avoiding dry welding. It also prevents wire accumulation and excessively large weld points during low-temperature welding in the laser welding machine 302, which could cause welding cracks. Furthermore, the conveying component 303 preheats the welding wire, and the control component 304 adjusts the wire feeding speed in real time, preventing dry welding at high temperatures and wire accumulation at low temperatures, thus reducing welding cracks and the need for secondary welding. The clamping and rotating component 201 securely clamps the steel pipe, reducing welding sway and preventing welding deviation, thereby improving welding accuracy. Simultaneously, the automated control of the entire welding process reduces manual intervention, further improving welding efficiency and consistency, and lowering production costs.

[0037] Example 2, refer to Figure 1 - Figure 5This is the second embodiment of the present invention, which differs from the first embodiment in that: the clamping and rotating assembly 201 includes a dual-head motor 2011 mounted on the support 101, a transmission rod 2012 mounted on the output end of the dual-head motor 2011, a rotating wheel 2013 mounted on the other end of the transmission rod 2012, a belt 2014 mounted on the outer diameter of the rotating wheel 2013, a driven wheel 2015 mounted on the other end of the belt 2014, and a rotating crossbar mounted on one side of the driven wheel 2015. The rotating horizontal plate 2016 includes a plate 2016 and a support ring 2019 rotatably disposed on the outer diameter of the rotating horizontal plate 2016. The bottom of the support ring 2019 is connected to the support part 101. An L-shaped moving block 2017 is slidably disposed inside the rotating horizontal plate 2016. A clamping member 2018 is disposed at the other end of the L-shaped moving block 2017 and is slidably connected to the rotating horizontal plate 2016. A stepped ring 2019-1 is disposed on the inner diameter of the support ring 2019 and is connected to the L-shaped moving block. In the 2017 sliding connection, after the steel pipe is placed on top of the second fixing ring 2027 and the steel pipe is limited and fixed by the first fixing ring 2026, the clamping parts 2018 on both sides also engage with the sides of the steel pipe. Then, the dual-head motor 2011 starts to drive, causing the transmission rod 2012 to rotate together with the rotating wheel 2013, the drive belt 2014, and the driven wheel 2015. At the same time, the rotating horizontal plate 2016 also begins to rotate inside the support ring 2019 and moves in an L-shape. Under the sliding of the stepped ring 2019-1 inside the block 2017 and the support ring 2019, the L-shaped moving block 2017 begins to push the clamping member 2018 to move inside the rotating horizontal plate 2016, thereby causing the clamping member 2018 to move closer to the steel pipe in the middle until it is clamped and fixed. After the clamping member 2018 clamps and fixes the steel pipe, it continues to rotate, causing the clamping member 2018 and the rotating horizontal plate 2016 to rotate together with the steel pipe to cooperate with the welding of the laser welding machine 302.

[0038] Compared to Embodiment 1, the fixing component 202 further includes a fixing block 2021 disposed on the support portion 101, a movable member 2022 disposed on the fixing block 2021, an electric push rod 2024 disposed on the top of the movable member 2022, a sliding block 2023 disposed on the output end of the electric push rod 2024, an L-shaped connecting rod 2025 disposed on the sliding block 2023, and a fixing ring 2026 disposed at the bottom of the L-shaped connecting rod 2025. A fixing ring 2027 is disposed at the bottom of the fixing block 2021. Furthermore, the second fixing ring 2027 is connected to the support part 101. When performing laser welding of steel pipe, the steel pipe to be welded is placed at the bottom of the second fixing ring 2027. Then, the electric push rod 2024 extends to extend the sliding block 2023 and the L-shaped connecting rod 2025 downward together with the first fixing ring 2026 until the first fixing ring 2026 fits against the top of the steel pipe for limiting and fixing. It also cooperates with the rotating horizontal plate 2016 and the clamping part 2018 to assist the steel pipe in rotating and adjusting the welding angle during the laser welding process.

[0039] During use, when performing laser welding on steel pipes, the steel pipe to be welded is placed at the bottom of the second fixing ring 2027. Then, the electric push rod 2024 extends, causing the sliding block 2023 and the L-shaped connecting rod 2025 to extend downwards along with the first fixing ring 2026 until the first fixing ring 2026 is fitted against the top of the steel pipe for limiting and fixing. It also cooperates with the rotating horizontal plate 2016 and the clamping piece 2018 to assist the steel pipe in rotating and adjusting the welding angle during laser welding. After the steel pipe is placed on top of the second fixing ring 2027 and limited and fixed by the first fixing ring 2026, the clamping pieces 2018 on both sides also engage with the sides of the steel pipe. Then, the dual-head motor 2011 starts driving, causing the transmission rod 2012... The rotating wheel 2013 drives the belt 2014 and driven wheel 2015 to rotate together. At the same time, the rotating horizontal plate 2016 also begins to rotate inside the support ring 2019. Under the sliding of the L-shaped moving block 2017 and the stepped ring 2019-1 inside the support ring 2019, the L-shaped moving block 2017 begins to push the clamping member 2018 to move inside the rotating horizontal plate 2016, thereby bringing the clamping member 2018 closer to the central steel pipe until it is clamped and fixed. After the clamping member 2018 clamps and fixes the steel pipe, it continues to rotate, causing the clamping member 2018 and the rotating horizontal plate 2016 to rotate together with the steel pipe to cooperate with the welding of the laser welding machine 302, reduce welding wobbling, avoid welding deviation, and improve welding accuracy.

[0040] The remaining structure is the same as that in Example 1.

[0041] Example 3, referring to Figure 1 - Figure 10This is the third embodiment of the present invention, which differs from the second embodiment in that: the conveying assembly 303 includes an outer casing 3031 disposed at one end of the laser welding machine 302, a top plate 3032 slidably disposed inside the outer casing 3031, a mounting plate 3033 disposed on the top plate 3032, a fixing post 3036 disposed on the mounting plate 3033, and a guide member 3035 disposed on the outer diameter of the fixing post 3036, wherein the guide member 3035 and the mounting plate 3033 are connected. The connection includes a welding wire body 3034 at one end of the mounting plate 3033, which is slidably connected to the guide member 3035. An S-groove heating plate 3037 is installed inside the outer casing 3031 and is slidably connected to the welding wire body 3034. A guide tube 3038 is installed inside the outer casing 3031 and passes through and is fixedly connected to the laser welding machine 302. The clamping rotating assembly 201 and the fixing assembly 202 complete the welding of the steel... After the pipe is clamped and fixed, the movable welding frame 301 begins to adjust the laser welding machine 302 to perform laser welding on the bottom steel pipe. The outer box 3031 on the laser welding machine 302 feeds the welding wire to ensure stability during laser welding. While the outer box 3031 feeds the welding wire, the top plate 3032 feeds the internal mounting plate 3033 to fix the welding wire body 3034 on the surface of the mounting plate 3033. One end of the welding wire body 3034 is wound into the outer diameter groove of the guide member 3035. The welding wire body 3034 is then conveyed to the S-groove heating plate 3037 through the control component 304. The welding wire is preheated through the threaded groove between the S-groove heating plate 3037, which raises the temperature of the welding wire. The wire is then conveyed to the guide tube 3038 through the S-groove heating plate 3037 and finally to the bottom of the laser welding machine 302 to begin melting and welding.

[0042] Compared to Embodiment 2, the control component 304 further includes a partition plate 3041 disposed inside the outer casing 3031, a welding wire body 3034 disposed on the partition plate 3041, a connector 3043 disposed at the output end of the electric push rod 3042, a conical mounting bracket 3044 disposed at the other end of the connector 3043, a friction ball 3045 rotatably disposed inside the conical mounting bracket 3044, and a conical placement member 3046 disposed at the bottom of the friction ball 3045. The bottom of the conical placement member 3046 is provided with a protective shell 3047. The protective shell 3047 is connected to the dividing plate 3041. A guide shell 3048 is located at the bottom of the protective shell 3047. A straightening roller 3049 is located inside the guide shell 3048 and is slidably connected to the welding wire body 3034. During laser welding in the laser welding machine 302, if the welding temperature of the laser welding machine 302 is too high, the electric push rod 3042 inside the outer casing 3031 will move downwards and retract, thereby causing the connecting piece 3043 to carry the conical mounting bracket 3044 and friction beads 3044 inside the protective shell 3047. 45 moves downwards, causing the friction ball 3045 to fall inside the conical mounting bracket 3046, thus separating it from the surface of the welding wire body 3034 and preventing contact between the welding wire body 3034 and the welding wire body 3034. This increases the speed at which the welding wire body 3034 passes through the conical mounting bracket 3044, thereby increasing the supply speed of the welding wire body 3034 and avoiding the impact of untimely welding caused by the welding wire body 3034 not being delivered in time. Furthermore, when the welding temperature of the laser welding machine 302 is low, the electric push rod 3042 will move upwards, causing the connecting piece 3043 to carry the protective shell 30 The tapered mounting bracket 3044 and friction beads 3045 inside 47 are attached to the outer diameter of the welding wire body 3034, increasing the friction of the welding wire body 3034 as it passes through, thereby slowing down the passing speed of the welding wire body 3034. This prevents the welding points from accumulating and cracking due to the welding wire body 3034 being fed too fast. Furthermore, when the welding wire body 3034 passes through the inside of the guide shell 3048, the straightening roller 3049 inside the guide shell 3048 can straighten and feed the passing welding wire body 3034, ensuring smooth feeding of the welding wire body 3034.

[0043] During use, after the clamping and rotating assembly 201 and the fixing assembly 202 have clamped and fixed the steel pipe, the moving welding frame 301 begins to adjust the laser welding machine 302 to perform laser welding on the bottom steel pipe. The outer casing 3031 on the laser welding machine 302 feeds the welding wire to ensure stability during laser welding. While the outer casing 3031 feeds the welding wire, the top plate 3032 loads the internal mounting plate 3033, fixing the welding wire body 3034 to the mounting plate 3033. The surface is then prepared, and one end of the welding wire body 3034 is wound into the outer diameter groove of the guide member 3035. The welding wire body 3034 is then conveyed to the S-groove heating plate 3037 through the control component 304. The welding wire is preheated through the threaded groove between the S-groove heating plate 3037, which raises the temperature of the welding wire. The wire is then conveyed to the guide tube 3038 through the S-groove heating plate 3037 and finally to the bottom of the laser welding machine 302 to begin melting and welding with the laser welding machine 302.

[0044] During laser welding in the laser welding machine 302, if the welding temperature of the laser welding machine 302 is too high, the electric push rod 3042 inside the outer casing 3031 will move downward and retract, causing the connecting piece 3043, along with the conical mounting bracket 3044 and friction ball 3045 inside the protective shell 3047, to move downward. This causes the friction ball 3045 to fall inside the conical placement piece 3046, thus detaching it from the surface of the welding wire body 3034 and preventing contact with the welding wire body 3034. This increases the speed at which the welding wire body 3034 passes through the conical mounting bracket 3044, thereby increasing the supply speed of the welding wire body 3034 and avoiding the impact of untimely welding caused by the welding wire body 3034 not being delivered. Furthermore, when the welding temperature of the laser welding machine 302 is low, the electric push rod 3042 will move upward, causing the connecting piece 3043 to... 3. The conical mounting bracket 3044 and friction beads 3045 inside the protective shell 3047 are attached to the outer diameter of the welding wire body 3034, increasing the friction of the welding wire body 3034 as it passes through, thereby slowing down the passing speed of the welding wire body 3034. This prevents the welding wire body 3034 from being fed too fast, which could lead to weld point accumulation and cracks. Furthermore, when the welding wire body 3034 passes through the guide shell 3048, the straightening roller 3049 inside the guide shell 3048 can straighten and feed the passing welding wire body 3034, ensuring smooth feeding. This solves the problems of mismatch between welding temperature and wire feeding rate, which can lead to blank welding, welding wire accumulation and excessively large weld points at low temperatures, which can cause welding cracks and require secondary welding. In addition, the welding clamping and rotating device is prone to shaking when operating at large angles, which can cause steel pipe welding deviation.

[0045] The remaining structure is the same as that in Example 2.

[0046] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A welding apparatus for metals, characterized in that: include: The support unit (100) includes a support part (101). The fixed clamping unit (200) includes a clamping rotation assembly (201) disposed on the support (101) and a fixing assembly (202) disposed on the clamping rotation assembly (201), and the fixing assembly (202) is connected to the support (101); The welding unit (300) includes a movable welding frame (301) disposed on the top of the clamping and rotating assembly (201), a laser welding machine (302) disposed on the movable welding frame (301), a conveying assembly (303) disposed on the laser welding machine (302), and a control assembly (304) disposed inside the conveying assembly (303). The conveying assembly (303) includes an outer casing (3031) disposed at one end of the laser welding machine (302), a top plate (3032) slidably disposed inside the outer casing (3031), a mounting plate (3033) disposed on the top plate (3032), a fixing column (3036) disposed on the mounting plate (3033), and a guide member (3035) disposed on the outer diameter of the fixing column (3036), wherein the guide member (3035) is connected to the mounting plate (3033), and a welding wire body (3034) is disposed at one end of the mounting plate (3033), wherein the welding wire body (3034) is slidably connected to the guide member (3035); The outer casing (3031) is equipped with an S-slot heating plate (3037), and the S-slot heating plate (3037) is slidably connected to the welding wire body (3034). The outer casing (3031) is equipped with a guide tube (3038), and the guide tube (3038) is connected to the laser welding machine (302) through and fixedly connected. The control assembly (304) includes a partition plate (3041) disposed inside the outer casing (3031), an electric push rod two (3042) disposed on the partition plate (3041), a connector (3043) disposed at the output end of the electric push rod two (3042), a conical mounting bracket (3044) disposed at the other end of the connector (3043), a friction ball (3045) rotatably disposed inside the conical mounting bracket (3044), and a conical placement member (3046) disposed at the bottom of the friction ball (3045). The bottom of the conical placement piece (3046) is provided with a protective shell (3047), and the protective shell (3047) is connected to the dividing plate (3041). The bottom of the protective shell (3047) is provided with a guide shell (3048), and the inside of the guide shell (3048) is provided with a straightening roller (3049), and the straightening roller (3049) is slidably connected to the welding wire body (3034).

2. The metal welding apparatus according to claim 1, characterized in that: The clamping and rotating assembly (201) includes a dual-head motor (2011) mounted on the support (101), a transmission rod (2012) mounted on the output end of the dual-head motor (2011), a rotating wheel (2013) mounted on the other end of the transmission rod (2012), a belt (2014) mounted on the outer diameter of the rotating wheel (2013), a driven wheel (2015) mounted on the other end of the belt (2014), a rotating horizontal plate (2016) mounted on one side of the driven wheel (2015), and a support ring (2019) rotatably mounted on the outer diameter of the rotating horizontal plate (2016), with the bottom of the support ring (2019) connected to the support (101).

3. The metal welding apparatus according to claim 2, characterized in that: An L-shaped moving block (2017) is slidably arranged inside the rotating horizontal plate (2016), and a clamping member (2018) is provided at the other end of the L-shaped moving block (2017), and the clamping member (2018) is slidably connected to the rotating horizontal plate (2016).

4. The metal welding apparatus according to claim 3, characterized in that: The inner diameter of the support ring (2019) is provided with a stepped ring (2019-1), and the stepped ring (2019-1) is slidably connected to the L-shaped moving block (2017).

5. The metal welding apparatus according to claim 4, characterized in that: The fixing component (202) includes a fixing block (2021) disposed on the support (101), a movable member (2022) disposed on the fixing block (2021), an electric push rod (2024) disposed on the top of the movable member (2022), a sliding block (2023) disposed on the output end of the electric push rod (2024), an L-shaped connecting rod (2025) disposed on the sliding block (2023), and a fixing ring (2026) disposed at the bottom of the L-shaped connecting rod (2025).

6. The metal welding apparatus according to claim 5, characterized in that: The bottom of the fixing block (2021) is provided with a fixing ring 2 (2027), and the fixing ring 2 (2027) is connected to the support part (101).

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