A welding robot for metal work

Abstract

The application belongs to the technical field of metal piece processing and manufacturing, and particularly discloses a welding robot for metal piece processing, which comprises a base, a welding assembly arranged above the base, an installation plate, bolts for fixing the installation plate to the base, a welding robot slidably connected to the installation plate, a rotating shaft rotatably connected to an output end of the welding robot, an installation disc fixed to an outer diameter of the rotating shaft, two through holes one symmetrically arranged based on a center of the installation disc and provided in an end face of the installation disc, a welding liquid storage tank connected to one side of the two through holes one through a pipeline, a rotating disc rotatably connected to the other side of the installation disc, a motor for driving the rotating disc to rotate, two through holes two provided in an end face of the rotating disc, and the through holes two located on a rotating path of the through holes one. The device solves the problem of the current device that the welding head is affected by high temperature and splashing of welding slag, thereby affecting the welding quality.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of metal part processing and manufacturing, and particularly relates to a welding robot for metal part processing. BACKGROUND

[0002] In the field of metal part processing and manufacturing, welding is a very critical process link, and its quality directly determines the overall performance and service life of the metal part. With the rapid development of industrial automation technology, welding robots have gradually replaced traditional manual welding and become the mainstream equipment for metal part welding due to their high efficiency, precision and stability.

[0003] During the welding process of metal parts, the welding head is continuously in a high-temperature working state and inevitably contaminated with welding slag and stains. Traditional welding robots lack effective welding head cooling and cleaning mechanisms. As the welding operation continues, the welding head temperature continuously rises, which not only accelerates the wear of the welding head and shortens its service life, but also causes the performance of the welding material to change due to high temperature, thereby affecting the welding quality and causing defects such as uneven welds, pores, etc. At the same time, the accumulation of welding slag and stains can interfere with the stability of the welding arc, further reducing the welding precision and increasing the scrap rate.

[0004] The existing welding robots often have low efficiency and insufficient flexibility when facing complex welding tasks. For example, when performing repair welding, the traditional welding robot usually needs to adjust the position and angle of the welding head multiple times to complete the overall welding and repair welding of the weld, which not only consumes a lot of time but also increases the complexity of the operation.

[0005] In order to solve the above problems, the present application provides a welding robot for metal part processing to solve the problem of affecting the welding quality due to the high temperature and welding slag splashing of the welding head of the current device. SUMMARY

[0006] The purpose of the present application is to provide a welding robot for metal part processing to solve the problems raised in the background art.

[0007] In order to solve the above technical problems, the present application provides the following technical scheme: a welding robot for metal part processing, comprising a base, a welding assembly is arranged above the base,

[0008] The welding assembly comprises a mounting plate fixed with the base by bolts, a welding robot slidingly connected to the mounting plate, a rotating shaft rotatably connected to the output end of the welding robot, a mounting disc fixed to the outer diameter of the rotating shaft, two through holes one symmetrically arranged on the end face of the mounting disc, a welding liquid storage tank connected to one side of the through holes one through a pipeline, a rotating disc rotatably connected to the other side of the mounting disc, the rotating disc being driven to rotate by a motor, two through holes two provided on the end face of the rotating disc, the through holes two being located on the rotating path of the through holes one, and a connecting pipe sealingly connected to the other end of the through holes two.

[0009] Two fixing frames are fixed to the side of the rotating disc away from the mounting disc and arranged close to the through holes two respectively, and a welding head is clamped to the fixing frame.

[0010] The cleaning assembly comprises a rotating sleeve, the rotating sleeve being sleeved outside the sliding rod and being rotatably connected to the sliding rod, a matching plate being rotatably connected to the outer diameter of the rotating sleeve, two butt joints being provided on the matching plate, and the butt joints being adapted to the butt joint.

[0011] The through holes two comprise a butt joint groove, the butt joint groove being provided on the end face of the rotating disc close to the connecting pipe, the butt joint groove being communicated with the through holes two and the outer diameter of the rotating disc, the butt joint groove being used for assisting butt joint of the connecting pipe and the through holes two, a sliding channel being provided in the side wall of the butt joint groove, and an arc-shaped sealing piece being slidingly connected in the sliding channel, the arc-shaped sealing piece being used for sealing the butt joint of the connecting pipe and the through holes two.

[0012] The welding head is rotatably connected to the output end of the welding robot, the mounting disc is fixed to the outer diameter of the rotating shaft, two through holes one are symmetrically arranged on the end face of the mounting disc, a welding liquid storage tank is connected to one side of the through holes one through a pipeline, a rotating disc is rotatably connected to the other side of the mounting disc, the rotating disc is driven to rotate by a motor, two through holes two are provided on the end face of the rotating disc, the through holes two are located on the rotating path of the through holes one, and a connecting pipe is sealingly connected to the other end of the through holes two.

[0013] One end of the mounting seat is clamped to the fixing frame, the other end of the mounting seat is fixed with a butt joint, the butt joint is provided with a butt joint socket, and the butt joint and the butt joint socket are used for assisting replacement of the welding head.

[0014] The output end of the welding head is designed to be bent, the welding head comprises a welding liquid inlet and a welding liquid outlet, the welding liquid inlet and the welding liquid outlet are communicated through a liquid conveying pipeline, the side close to the rotating disc is the welding liquid inlet, the side close to the output end of the welding head is the welding liquid outlet, the connecting pipe is matched with the welding liquid inlet and is communicated therewith.

[0015] The application further discloses that the rotating sleeve is fixed with a connecting plate two, one side of the connecting plate two is provided with a rotating groove, the rotating groove is matched with the matching plate, and the rotating groove is used for providing a rotating path for the matching plate.

[0016] The application further discloses that the two supporting seats are close to one side of the welding assembly, and the chuck is installed on the side of the supporting seat.

[0017] The application further discloses that the side wall of the butt joint hole is provided with a mounting groove, the mounting groove is threadedly connected with a pneumatic cylinder, and the output end of the pneumatic cylinder faces the butt joint hole and is matched with the butt joint hole of the butt joint.

[0018] The application further discloses that the liquid passing part is hollow, a liquid passing hole four is arranged between the liquid passing part and the liquid passing hole two, and when the butt joint is cooled and cleaned, part of the welding liquid enters the liquid passing part through the liquid passing hole four to cool the butt joint.

[0019] The application further discloses that one end of the base is fixed with a protection seat, the welding liquid storage tank is arranged on the protection seat, and the protection seat is provided with a staircase.

[0020] Compared with the prior art, the application has the beneficial effects that:

[0021] By adopting the symmetrical arrangement of the bending type butt joint, the motor driven pulley is used for adjusting the angle of the butt joint, so that the two butt joints can be arranged in front of and behind the welding seam. After the front butt joint completes main welding, the rear butt joint immediately performs repair welding, and the double-process operation can be completed through single clamping, welding efficiency is improved, positioning error is avoided, and the welding seam forming quality is obviously improved.

[0022] Through the cleaning assembly: the sliding rod is axially movable in the rectangular sliding groove, when cleaning is needed, the air cylinder output end is inserted into the butt joint socket, the welding head is quickly disassembled from the fixing frame and transferred to the liquid passing chamber. The liquid passing split halves are combined to form a closed space, the welding liquid circulates through the path of liquid passing hole two→liquid passing hole one→connecting pipe→welding head→liquid passing hole three, and the slag flushing and heat exchange cooling are simultaneously completed, so that the welding quality and efficiency are further improved. BRIEF DESCRIPTION OF DRAWINGS

[0023] The accompanying drawings are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and are included to provide a further understanding of the application, and are made a part of the specification and are used to explain the application, and do not constitute a limitation on the application. In the drawings:

[0024] Figure 1 is a schematic diagram of the overall structure of an embodiment of the application;

[0025] Figure 2 is a schematic diagram of the A area of an embodiment of the application; Figure 1

[0026] Figure 3 is a schematic diagram of the rotating disc structure of an embodiment of the application;

[0027] Figure 4 is a schematic diagram of the cleaning assembly structure of an embodiment of the application;

[0028] Figure 5 is a schematic diagram of the internal structure of the cleaning assembly of an embodiment of the application;

[0029] Figure 6 is a schematic diagram of the welding head and cleaning assembly butt joint structure of an embodiment of the application;

[0030] Figure 7 is a schematic diagram of the liquid passing split halves combined front view of an embodiment of the application;

[0031] Figure 8 is a schematic diagram of the liquid passing split halves combined side view of an embodiment of the application;

[0032] Figure 9 is a schematic diagram of the protective seat structure of an embodiment of the application;

[0033] Figure 10 is a schematic diagram of the internal structure of the mounting seat of an embodiment of the application;

[0034] In the drawings: 1, base; 101, protective seat; 102, staircase;

[0035] 2, clamping assembly; 201, support seat; 202, connecting plate one; 203, chuck; 204, rectangular sliding groove; 205, sliding rod;

[0036] ​3, welding assembly; 301, mounting plate; 302, slide rail; 303, welding robot; 304, rotating shaft; 305, mounting disc; 3051, through hole one; 306, rotating disc; 3061, through hole two; 30611, butt joint groove; 30612, sliding channel; 30613, arc-shaped sealing piece; 3062, motor; 3063, connecting pipe; 3064, welding head; 30641, welding liquid input port; 30642, welding liquid output port; 3065, fixing frame; 3066, mounting seat; 3067, butt joint; 3068, butt joint socket;

[0037] 4, cleaning assembly; 401, rotating sleeve; 402, matching plate; 403, butt joint hole; 404, connecting plate two; 405, rotating groove; 406, liquid passing block; 407, liquid passing hole two; 408, liquid passing split; 4081, liquid passing hole one; 4082, liquid passing hole three; 409, mounting groove; 410, air cylinder; 411, liquid passing hole four;

[0038] 5, welding liquid storage tank. DETAILED DESCRIPTION

[0039] The technical solutions of the present application will be further described in detail below in combination with preferred embodiments and drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work are within the protection scope of the present application.

[0040] Please refer to Figures 1-10 The embodiments of the present application provide technical solutions: a welding robot for metal piece processing, comprising a base 1.

[0041] As Figure 1 shown, the base 1 is rotatably connected with support seats 201 on both sides, and the two support seats 201 are connected through a connecting plate one 202 to form a clamping assembly 2, the clamping assembly 2 is used for clamping a metal piece to be processed, and a welding assembly 3 is arranged above the base 1, and the welding assembly 3 is used for welding the metal piece fixed by the clamping assembly 2.

[0042] As Figure 1 and Figure 2As shown, the welding assembly 3 comprises a mounting plate 301 fixed with the base 1 by bolts, a slide rail 302 is arranged above the mounting plate 301, a welding robot 303 is slidably connected on the slide rail 302, the sliding range of the welding robot 303 is between the two support seats 201, a rotating shaft 304 is rotatably connected to the output end of the welding robot 303, an installation disc 305 is fixed on the outer diameter of the rotating shaft 304, two through holes I 3051 are arranged on the end face of the installation disc 305 and symmetrically based on the center of the installation disc 305, a welding liquid storage tank 5 is connected by pipeline on one side of the two through holes I 3051, and the welding liquid is delivered through the welding liquid storage tank 5, a rotating disc 306 is rotatably connected to the other side of the center of the installation disc 305, the rotating disc 306 is driven to rotate by a motor, two through holes II 3061 are arranged on the end face of the rotating disc 306, the through holes II 3061 are located on the rotating path of the through holes I 3051, and a connecting pipe 3063 is sealingly connected to the other end of the through holes II 3061, the connecting pipe 3063 is used for delivering the welding liquid.

[0043] The end face of the through holes II 3061 close to the connecting pipe 3063 is provided with a butt joint groove 30611, the butt joint groove 30611 is matched with the outer diameter of the connecting pipe 3063, so that the butt joint groove 30611 communicates the through holes II 3061 with the outer diameter of the rotating disc 306, and the butt joint groove 30611 and the through holes II 3061 form a guide structure for butt joint of the auxiliary connecting pipe 3063 and the through holes II 3061. An arc-shaped sliding channel 30612 is arranged on the side wall of the butt joint groove 30611, the sliding channel 30612 is adjacent to the through holes II 3061, and an arc-shaped sealing piece 30613 is slidably connected in the sliding channel 30612. By sliding the arc-shaped sealing piece 30613, the arc-shaped sealing piece 30613 slides out of the sliding channel 30612 until it contacts the butt joint groove 30611 on the opposite side to form a sealed through hole.

[0044] An arc-shaped sliding channel 30612 is arranged on the side wall of the butt joint groove 30611, the sliding channel 30612 is adjacent to the through holes II 3061, and an arc-shaped sealing piece 30613 is slidably connected in the sliding channel 30612. By sliding the arc-shaped sealing piece 30613, the arc-shaped sealing piece 30613 slides out of the sliding channel 30612 until it contacts the butt joint groove 30611 on the opposite side to form a sealed through hole.

[0045] When the connection pipe 3063 and the through hole two 3061 need to be connected, the connection pipe 3063 is placed in the butt joint groove 30611, and is slid along the butt joint groove 30611 to the position of the through hole two 3061, so that the inner cavity of the connection pipe 3063 is communicated with the through hole two 3061; the sliding arc-shaped sealing piece 30613 is extended from the sliding channel 30612 and is attached to the side wall of the butt joint groove 30611 on the opposite side, so as to close the butt joint gap and complete the sealing.

[0046] As shown in Figure 1 , Figure 2 and Figure 10 , the rotating disc 306 is fixed with two fixed frames 3065 on the side away from the mounting disc 305, the fixed frames 3065 are used to support the welding head 3064, the two fixed frames 3065 are arranged close to the two through holes two 3061 respectively, the welding head 3064 is clamped on the fixed frame 3065, the mounting seat 3066 is connected to the outer side bearing of the welding head 3064, the mounting seat 3066 is hollow inside and fixed with the motor 3062, the output end of the motor 3062 is fixed with a pulley, and the pulley is in surface contact with the welding head 3064 to form a friction transmission.

[0047] The output end of the welding head 3064 is designed to be bent, and the bending angle is 0-60°.

[0048] By starting the motor 3062, the motor 3062 drives the welding head 3064 to rotate through the pulley, and since the output end is designed to be bent, the distance between the output ends of the two welding heads 3064 is changed by rotating.

[0049] One end of the mounting seat 3066 is clamped with the fixed frame 3065, the other end of the mounting seat 3066 is fixed with a butt joint 3067, the butt joint 3067 is provided with a butt joint jack 3068, and the butt joint 3067 and the butt joint jack 3068 are used to assist in replacing the welding head 3064.

[0050] As shown in Figure 3 and Figure 7 , the welding head 3064 includes a welding liquid input port 30641 and a welding liquid output port 30642, the welding liquid input port 30641 and the welding liquid output port 30642 are communicated through a liquid conveying pipeline, the welding liquid input port 30641 is opened close to the side of the rotating disc 306, the welding liquid output port 30642 is opened close to the output end of the welding head 3064, and the connection pipe 3063 is matched with and communicated with the welding liquid input port 30641.

[0051] When the through hole two 3061 coincides with the through hole one 3051 by rotating the rotating disc 306, the through hole two 3061 and the through hole one 3051 are communicated, so that the welding liquid is conveyed from the welding liquid storage tank 5 to the welding head 3064 through the pipe, and finally the welding head 3064 outputs the welding liquid to the metal piece for welding.

[0052] When the metal piece is welded, the metal piece to be processed is fixed on the clamping assembly 2, and the welding robot 303 is started. The welding robot 303 slides on the slide rail 302, drives the rotating shaft 304 and the mounting disc 305 on it to move to the position to be welded. The welding liquid is conveyed from the welding liquid storage tank 5 to the through hole one 3051 through the pipe, the welding liquid in the through hole one 3051 flows into the through hole two 3061 located in the rotating path of the through hole one 3051, and is conveyed to the welding head 3064 through the connecting pipe 3063, so as to perform the welding operation on the metal piece to be processed by the welding head 3064.

[0053] Repair welding operation: by bending two welding heads 3064 to change the welding position of the welding head 3064, the two welding heads 3064 are arranged in front of and behind the weld one by one, welding is performed through the front welding head 3064, and repair welding is performed through the rear welding head 3064, so as to reduce the welding times and the welding time (when the two welding heads 3064 are arranged in front of and behind each other, the minimum distance is ≥50mm).

[0054] As shown in Figure 1 The two support seats 201 are provided with chucks 203 close to one side of the welding assembly 3, the chucks 203 are three-jaw automatic centering chucks, the chucks 203 are used for clamping metal pieces, the two chucks 203 are arranged oppositely, a rectangular sliding groove 204 is formed in the support seat 201 based on the outer side of the chuck 203, a sliding rod 205 is arranged in the rectangular sliding groove 204, the sliding rod 205 slides in the rectangular sliding groove 204, a linear drive is arranged in the rectangular sliding groove 204, the sliding rod 205 is driven to displace by the linear drive, and a cleaning assembly 4 is rotationally connected to the outer side of the sliding rod 205, the cleaning assembly 4 is used for cleaning the welding head 3064.

[0055] In the process of processing the metal piece to be processed, when the welding head 3064 is in the process of welding, the welding effect is affected due to the influence of welding slag and stains, and heat is generated in the case of long-term work of the welding head 3064, which affects the welding efficiency when the temperature is too high, so the cleaning assembly 4 is arranged to clean and cool the welding head 3064.

[0056] As shown in Figure 4As shown, the cleaning assembly 4 comprises a rotating sleeve 401 sleeved outside the sliding rod 205 and rotationally connected therewith, an adapter plate 402 rotationally connected to the outer diameter of the rotating sleeve 401, two adapter holes 403 formed in the adapter plate 402 and adapted with the adapter 3067. The rotating sleeve 401 is fixed with a second connecting plate 404, one side of which is provided with a rotating groove 405 adapted with the adapter plate 402 to provide a rotating path for the adapter plate 402.

[0057] A polytetrafluoroethylene friction ring is embedded between the inner wall of the rotating sleeve 401 and the outer wall of the sliding rod 205. The inner diameter of the friction ring is gap-fitted with the outer diameter of the sliding rod 205 to generate friction force by compression.

[0058] When it is necessary to clean or cool the welding head 3064, the adapter 3067 and the adapter hole 403 are adapted to each other by controlling the welding robot 303 and the rotating cleaning assembly 4, so as to detach the welding head 3064 from the fixing frame 3065.

[0059] As shown, Figures 4-8 The second connecting plate 404 is fixed with a liquid passing block 406 away from the rotating groove 405, the liquid passing block 406 is provided with a second liquid passing hole 407 adapted with the pipeline of the welding liquid storage tank 5, and the liquid passing block 406 is rotationally connected with liquid passing halves 408 on both sides. The two liquid passing halves 408 are magnetically attracted to each other to form a liquid passing chamber, the liquid passing chamber is provided with a first liquid passing hole 4081 close to the second liquid passing hole 407, the first liquid passing hole 4081 is positionally corresponding to and adapted with the second liquid passing hole 407, and the liquid passing chamber is provided with a third liquid passing hole 4082 away from the second liquid passing hole 407, the third liquid passing hole 4082 is adapted with the welding liquid outlet 30642.

[0060] The adapter hole 403 is provided with a mounting groove 409 in the side wall, and a gas cylinder 410 is threadedly connected in the mounting groove 409, the output end of the gas cylinder 410 faces the adapter hole 403 and is adapted with the adapter plug hole 3068. When the adapter 3067 is inserted into the adapter hole 403, the output end of the gas cylinder 410 is started to enter the adapter plug hole 3068 to tightly fix the welding head 3064 and the adapter plate 402 together.

[0061] The welding robot 303 controls the fixed frame 3065 to separate from the welding head 3064. By rotating the matching plate 402, the matching plate 402 drives the welding head 3064 to rotate, and the connecting pipe 3063 gradually matches with the liquid passage hole two 407 in the process of rotating the welding head 3064. When the connecting pipe 3063 completely matches with the liquid passage hole two 407, the two liquid passage halves 408 are rotated to combine and form a liquid passage chamber to completely wrap the welding head 3064, and the liquid passage hole three 4082 is connected with the welding liquid outlet 30642.

[0062] By injecting the welding liquid into the liquid passage hole two 407, the welding liquid in the liquid passage hole two 407 enters the connecting pipe 3063 through the liquid passage hole one 4081, thereby cooling and cleaning the welding head 3064, and finally flows out from the liquid passage hole three 4082.

[0063] The liquid passage half 408 is internally hollow, and a liquid passage hole four 411 is arranged between the inside of the liquid passage half 408 and the liquid passage hole two 407. When the welding head 3064 is cooled and cleaned, part of the welding liquid in the liquid passage hole two 407 enters the liquid passage half 408 through the liquid passage hole four 411 to cool the welding head 3064.

[0064] As shown in Figure 9 The base 1 is fixed with a protection seat 101 at one end, and the welding liquid storage tank 5 is located on the protection seat 101. The welding liquid storage tank 5 is used for storing soldering liquid, and a pump body is arranged in the welding liquid storage tank 5 to realize pipeline conveying. A staircase 102 is arranged on the side wall of the protection seat 101, and the welding robot 303 can be repaired by climbing the staircase 102 to the top of the protection seat 101.

[0065] Working principle:

[0066] When the metal piece is welded, the metal piece to be processed is fixed on the clamping assembly 2, and the welding robot 303 is started. The welding robot 303 slides on the slide rail 302, drives the rotating shaft 304 and the mounting disc 305 on the rotating shaft 304 to move to the welding position. The welding liquid is conveyed from the welding liquid storage tank 5 to the through hole one 3051 through the pipeline, and the welding liquid in the through hole one 3051 flows into the through hole two 3061 located on the rotating path of the through hole one 3051, and is conveyed to the welding head 3064 through the connecting pipe 3063, so that the welding head 3064 performs the welding work on the metal piece to be processed.

[0067] In the process of processing the metal piece to be processed, when the welding head 3064 is welded, the welding effect is affected due to the influence of welding slag and stains, and the welding head 3064 generates heat in the case of long-term work. When the temperature is too high, the welding efficiency will be affected, so the cleaning assembly 4 is arranged to clean and cool the welding head 3064.

[0068] When it is necessary to clean or cool the welding head 3064, the butt joint 3067 and the butt joint hole 403 are butted by controlling the welding robot 303 and the rotating cleaning assembly 4, so as to detach the welding head 3064 from the fixing frame 3065.

[0069] The side wall of the butt joint hole 403 is provided with a mounting groove 409, and a cylinder 410 is threadedly connected in the mounting groove 409, and the output end of the cylinder 410 faces the butt joint hole 403. When the butt joint 3067 is inserted into the butt joint hole 403, the welding head 3064 is tightly fixed with the matching plate 402 by starting the cylinder 410 to make the output end of the cylinder 410 enter the butt joint hole 3068.

[0070] The fixing frame 3065 is separated from the welding head 3064 by controlling the welding robot 303 again. The matching plate 402 drives the welding head 3064 to rotate by rotating the matching plate 402, and the connecting pipe 3063 gradually matches with the liquid passage hole two 407 in the process of rotating the welding head 3064. When the connecting pipe 3063 completely matches with the liquid passage hole two 407, the two liquid passage halves 408 are rotated to combine and form a liquid passage chamber to completely wrap the welding head 3064, and the liquid passage hole three 4082 is butted with the welding liquid outlet 30642.

[0071] The welding liquid in the liquid passage hole two 407 enters the connecting pipe 3063 through the liquid passage hole one 4081 by injecting the welding liquid into the liquid passage hole two 407, so as to cool and clean the welding head 3064, and finally flows out from the liquid passage hole three 4082. When the welding liquid is located in the liquid passage hole two 407, part of the welding liquid enters the liquid passage half 408 to cool the welding head 3064 through the liquid passage hole four 411.

[0072] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", etc. indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0073] Finally, it should be pointed out that: the above examples are only used to illustrate the technical solutions of the present application, and are not limited thereto. Although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing examples, or make equivalent substitutions for part of the technical features, and these modifications or substitutions do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A welding robot for metal piece processing, comprising a base (1), characterized in that: The base (1) is provided with a welding assembly (3) above, The welding assembly (3) includes a mounting plate (301) fixed with the base (1) by bolts, a welding robot (303) is slidably connected to the mounting plate (301), a rotating shaft (304) is rotatably connected to an output end of the welding robot (303), an installation disc (305) is fixed to an outer diameter of the rotating shaft (304), two through holes (3051) are formed in an end face of the installation disc (305) and symmetrically arranged based on a center of the installation disc (305), a welding liquid storage tank (5) is connected to one side of the two through holes (3051) through a pipeline, a rotating disc (306) is rotatably connected to the other side of the installation disc (305), the rotating disc (306) is driven to rotate by a motor, two through holes (3061) are formed in an end face of the rotating disc (306), the through holes (3061) are located on a rotating path of the through holes (3051), and a connecting pipe (3063) is sealingly connected to the other end of the through holes (3061); Two fixing frames (3065) are fixed to one side of the rotating disc (306) away from the installation disc (305) and arranged close to the two through holes (3061), respectively, and a welding head (3064) is clamped on the fixing frame (3065); The output end of the welding head (3064) is designed to be bent, the welding head (3064) includes a welding liquid inlet (30641) and a welding liquid outlet (30642), the welding liquid inlet (30641) and the welding liquid outlet (30642) are communicated through a liquid conveying pipeline, the welding liquid inlet (30641) is located close to one side of the rotating disc (306), the welding liquid outlet (30642) is located close to one side of the output end of the welding head (3064), and the connecting pipe (3063) is matched with and communicated with the welding liquid inlet (30641); A mounting seat (3066) is connected to an outer bearing of the welding head (3064), the mounting seat (3066) is hollow and fixed with a motor (3062) inside, a belt wheel is fixed to an output end of the motor (3062), and the belt wheel is in surface contact with the welding head (3064) to form a friction transmission; One end of the mounting seat (3066) is clamped with the fixing frame (3065), the other end of the mounting seat (3066) is fixed with a butt joint (3067), a butt joint socket (3068) is formed in the butt joint (3067), and the butt joint (3067) and the butt joint socket (3068) are used for assisting replacement of the welding head (3064). Both sides of the base (1) are rotatably connected with support seats (201), two support seats (201) are connected through a connecting plate (202) to form a clamping assembly (2), two support seats (201) are installed with a chuck (203) on the side close to the welding assembly (3), a rectangular sliding groove (204) is formed on the support seat (201) based on the outer side of the chuck (203), a sliding rod (205) is arranged in the rectangular sliding groove (204), the sliding rod (205) is located in the rectangular sliding groove (204) and slides, a linear drive is arranged in the rectangular sliding groove (204), the outer side of the sliding rod (205) is rotatably connected with a cleaning assembly (4); The cleaning assembly (4) comprises a rotating sleeve (401), the rotating sleeve (401) is sleeved on the outer side of the sliding rod (205) and rotatably connected therewith, a matching plate (402) is rotatably connected to the outer diameter of the rotating sleeve (401), two butt joints (403) are formed in the matching plate (402), and the butt joints (403) are matched with the butt joints (3067). The rotating sleeve (401) is fixed with a connecting plate (404), a rotating groove (405) is formed in one side of the connecting plate (404), the rotating groove (405) is matched with the matching plate (402) and used for providing a rotating path for the matching plate (402), a liquid passing block (406) is fixed on the side away from the rotating groove (405) of the connecting plate (404), a liquid passing hole (407) is formed in the liquid passing block (406), the liquid passing hole (407) is matched with the pipeline of the welding liquid storage tank (5), liquid passing halves (408) are rotatably connected to the two sides of the liquid passing block (406), the two liquid passing halves (408) are magnetically attracted together to form a liquid passing chamber, a liquid passing hole (4081) is formed in the side of the liquid passing chamber close to the liquid passing hole (407), the liquid passing hole (4081) corresponds to and matches the liquid passing hole (407), and a liquid passing hole (4082) is formed in the side of the liquid passing chamber away from the liquid passing hole (407), the liquid passing hole (4082) is matched with the welding liquid outlet (30642).

2. The welding robot for metal work according to claim 1, characterized in that: The through hole (3061) comprises an abutting groove (30611), the abutting groove (30611) is formed in the end face of the rotating disc (306) close to the connecting pipe (3063), the abutting groove (30611) is connected with the through hole (3061) and the outer diameter of the rotating disc (306), the abutting groove (30611) is used for assisting the abutment of the connecting pipe (3063) and the through hole (3061), a sliding channel (30612) is formed in the side wall of the abutting groove (30611), and an arc-shaped sealing piece (30613) is slidably connected in the sliding channel (30612), the arc-shaped sealing piece (30613) is used for sealing the abutment of the connecting pipe (3063) and the through hole (3061).

3. The welding robot for metal work according to claim 2, characterized in that: The chuck (203) adopts a three-claw automatic centering chuck, the chuck (203) is used for clamping a metal piece, and two chuck (203) are oppositely arranged.

4. The welding robot for metal work according to claim 3, characterized in that: The side wall of the butt joint hole (403) is provided with a mounting groove (409), a gas cylinder (410) is threadedly connected in the mounting groove (409), and the output end of the gas cylinder (410) faces the butt joint hole (403) and is matched with the butt joint plug hole (3068) of the butt joint (3067).

5. The welding robot for metal work according to claim 4, characterized in that: The through liquid part (408) is internally hollow, a through liquid hole four (411) is arranged between the inside of the through liquid part (408) and the through liquid hole two (407), and when the butt joint (3064) is cooled and cleaned, part of the welding liquid enters the through liquid part (408) through the through liquid hole four (411) to cool the butt joint (3064) when the welding liquid is located in the through liquid hole two (407).

6. The welding robot for metal work according to claim 5, characterized in that: One end of the base (1) is fixedly provided with a protection seat (101), the welding liquid storage tank (5) is arranged on the protection seat (101), and the side wall of the protection seat (101) is provided with a staircase (102).

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