A welding robot

Abstract

The present application relates to the technical field of welding equipment, and discloses a welding robot, which includes a robotic arm, a welding mechanism and a workbench. The welding mechanism is connected to the workbench through the robotic arm. The welding mechanism includes a gas supply assembly, a sleeve and a welding torch. The sleeve is sleeved outside the nozzle of the welding torch. A first air passage is provided between the sleeve and the nozzle. A flow guiding member is provided in the first air passage. The flow guiding member is sleeved outside the nozzle. The flow guiding member is fixedly connected to the sleeve. A plurality of flow guiding grooves are formed in the flow guiding member. The flow guiding grooves are spirally formed around the axis of the sleeve. A gap exists between the flow guiding member and the nozzle. The gas supply assembly includes a gas storage tank and an air pump. The gas storage tank is used for storing a shielding gas. The inlet end of the air pump is communicated with the gas storage tank. The outlet end of the air pump is communicated with the first air passage. The present application has the effect of alleviating the influence of welding slag on the welding quality.

Description

Technical Field

[0001] The present application relates to the field of welding equipment, and in particular to a welding robot. Background Art

[0002] Welding, also known as fusion, is a manufacturing process and technology that uses heating, high temperature or high pressure to join metals or other thermoplastic materials such as plastics. Welding technology is widely used, from giant ships weighing hundreds of thousands of tons to microelectronic components weighing less than 1 gram, all rely on welding technology to varying degrees in production. Welding has penetrated into all areas of manufacturing, directly affecting product quality, reliability and life, as well as production costs, efficiency and market response speed.

[0003] However, harmful substances such as smoke and exhaust gas generated during the welding process, as well as dangerous factors such as high temperature and spark spattering in welding operations, pose a threat to the health and safety of workers. Therefore, welding robots are gradually being used to replace manual labor, transferring dangerous factors to robots and reducing the risk of worker injury.

[0004] At present, during the welding process of workpieces by existing welding robots, molten metal welding slag often splashes at the welding point. Although there is protective gas blown out of the gas guide sleeve, due to the fast splashing speed and scattered splashing of the welding slag, some welding slag will still enter the gap formed by the inner wall of the gas guide sleeve and the outer wall of the welding nozzle. After entering, the welding slag cools down quickly and solidifies on the inner wall of the gas guide sleeve and the outer wall of the welding nozzle. As the welding slag accumulates, the airflow channel becomes narrower, affecting the smoothness of the airflow, and further affecting the welding effect of the welding robot. Summary of the invention

[0005] In order to alleviate the influence of welding slag accumulation on the inner wall of the gas guide sleeve and the outer wall of the welding nozzle on the welding effect of the welding robot, the present application provides a welding robot.

[0006] The present application provides a welding robot, which adopts the following technical solution:

[0007] A welding robot comprises a mechanical arm, a welding mechanism and a workbench, wherein the welding mechanism is connected to the workbench through the mechanical arm, the welding mechanism comprises an air supply assembly, a sleeve and a welding gun, the sleeve is sleeved on the outside of a welding nozzle of the welding gun, a first air duct is arranged between the sleeve and the welding nozzle, a flow guide is arranged in the first air duct, the flow guide is sleeved on the outside of the welding nozzle, the flow guide is fixedly connected to the sleeve, a plurality of flow guide grooves are provided on the flow guide, the flow guide grooves are spirally opened with the axis of the sleeve as the axis, a gap is provided between the flow guide and the welding nozzle, the air supply assembly comprises an air storage tank and an air pump, the air storage tank is used to store protective gas, the air inlet end of the air pump is connected to the air storage tank, and the air outlet end of the air pump is connected to the first air duct.

[0008] By adopting the above technical solution, a flow guide is arranged in the first air duct. After the air pump pours the protective gas in the gas storage tank into the first air duct, a part of the protective gas flows into the flow guide groove of the flow guide. After being guided by the flow guide, the protective gas spirally flows out of the first air duct, forming a swirling flow around the welding torch. Most of the welding slag flies obliquely towards the first air duct. The protective gas that spirally flows out of the first air duct blows away the welding slag splashing into the first air duct, thereby reducing the possibility that the welding slag enters the gap formed between the inner wall of the sleeve and the outer wall of the welding torch, causing deposition and solidification, resulting in a narrowing of the air flow channel and affecting the smoothness of the air flow, and further affecting the welding effect of the welding robot. In addition, there is a gap between the flow guide and the welding torch. Part of the protective gas flows out of the first air duct through the gap between the flow guide and the welding torch and discharges the air in the welding area, effectively preventing the air from polluting the molten pool during the welding process, reducing oxidation and impurity generation, and ensuring the welding effect.

[0009] Optionally, an electromagnetic guiding assembly is arranged on the sleeve. The electromagnetic guiding assembly includes an annular exciting coil wound around the circumference of the sleeve, and the annular exciting coil is electrically connected to the power supply of the welding torch.

[0010] By adopting the above technical solution, an annular exciting coil is wound around the circumference of the sleeve on the outer side of the sleeve. After the annular exciting coil is energized, a magnetic field is generated at one end of the sleeve close to the welding torch. Since the welding slag is also a magnetic substance, after the welding slag enters the magnetic field generated by the energization of the annular exciting coil, it deflects away from the welding torch under the combined action of the Lorentz force and the magnetic force, facilitating the protective air flow that spirally flows out to blow away the welding slag splashing into the first air duct, and further reducing the possibility of the welding slag entering the first air duct.

[0011] Optionally, the sleeve includes an inner tube and an outer tube. The outer tube is coaxially sleeved outside the inner tube, and the outer tube is fixedly connected to the inner tube. The first air duct is located between the inner tube and the welding torch. The flow guide is fixedly connected to the inner tube. The annular exciting coil is sleeved outside the outer tube, and the annular exciting coil is fixedly connected to the outer tube.

[0012] By adopting the above technical solution, the sleeve includes an inner tube and an outer tube that are coaxially sleeved together, and the outer tube is fixedly connected to the inner tube. The annular exciting coil is sleeved outside the outer tube. The double-layer sleeve structure can, to a certain extent, reduce the influence of the high temperature generated during the welding process on the annular exciting coil and improve the service life of the annular exciting coil.

[0013] Optionally, a second air duct is arranged between the outer tube and the inner tube, and the air outlet end of the air pump is communicated with the second air duct.

[0014] By adopting the above technical solution, a second air duct is arranged between the outer tube and the inner tube, and the air pump pumps the protective gas into the second air duct. The protective gas in the second air duct flows out from one end of the outer tube close to the welding nozzle, further improving the air discharge efficiency of the welding area. In addition, during the flow of the protective gas in the second air duct, the heat transfer between the outer tube and the inner tube is further reduced, reducing the possibility of affecting the working effect of the annular excitation coil due to the high temperature generated during the welding process.

[0015] Optionally, a protective member is arranged on the outer tube, and the protective member is located on the side of the annular excitation coil close to the welding nozzle, and the protective member is used to block the splashing welding slag.

[0016] By adopting the above technical solution, a protective member is arranged on the side of the annular excitation coil close to the welding nozzle. Since the magnetic force generated after the annular excitation coil is energized will attract the welding slag, the protective member is used to block the welding slag splashing towards the annular excitation coil, so that the welding slag solidifies on the side wall of the protective member. While reducing the possibility of the welding slag splashing onto the annular excitation coil, the splashing welding slag is collected, reducing the possibility of the welding slag falling back onto the workpiece, and improving the service life of the annular excitation coil and the processing quality of the workpiece.

[0017] Optionally, the protective member includes a first baffle plate. The first baffle plate is sleeved on the outer tube and is perpendicular to the axis of the outer tube. A second baffle plate is fixedly connected to the outer extension of the first baffle plate, and the second baffle plate is inclined towards the direction close to the annular excitation coil.

[0018] By adopting the above technical solution, the first baffle plate is perpendicular to the axis of the outer tube, and a second baffle plate is fixedly connected to the outer extension of the first baffle plate. The second baffle plate is inclined towards the direction close to the annular excitation coil. After the annular excitation coil is energized, some of the welding slag moves towards the direction close to the annular excitation coil under the combined action of the Lorentz force and the magnetic force when entering the magnetic field. The inclined second baffle plate is used to block the welding slag approaching the annular excitation coil, so that the welding slag is deposited and solidified on the second baffle plate, reducing the possibility of the welding slag falling on the workpiece to be processed and improving the welding quality.

[0019] Optionally, the protective member is detachably and fixedly connected to the outer tube. The first baffle plate is slidably connected to the outer tube. A limiting block is arranged on the outer tube, and the limiting block is located on the side of the annular excitation coil close to the welding nozzle. Threads are provided on the side wall of the outer tube, and a nut is threadedly connected to the outer tube. The first baffle plate is clamped between the nut and the limiting block.

[0020] By adopting the above technical solution, the protective part is detachably and fixedly connected to the outer pipe. After the welding robot has been used for a period of time, the protective part can be separated from the outer pipe for cleaning to remove the welding slag adhering to its surface, and the cleaning of the protective part is convenient; the nut and the limit block are used in cooperation to lock the protective part, and the disassembly and assembly of the protective part are convenient, further improving the convenience of cleaning the protective part.

[0021] Optionally, a work-piece fixing seat is arranged on the workbench. The work-piece fixing seat is used for fixing the work-piece. A plurality of protective plates are arranged on the outer side of the work-piece fixing seat. The protective plate includes a main protective plate and two side protective plates. The main protective plate is located on the side of the work-piece fixing seat away from the robotic arm. The two side protective plates are connected to the side of the main protective plate close to the work-piece fixing seat. The side protective plate is perpendicular to the main protective plate. The side protective plate is slidably connected to the main protective plate. Both the main protective plate and the side protective plate are perpendicular to the workbench. An adjusting mechanism is arranged on the main protective plate. The adjusting mechanism is used for adjusting the distance between the two side protective plates.

[0022] By adopting the above technical solution, a main protective plate and side protective plates are arranged on the periphery of the work-piece to be processed. During the welding process, the shielding gas swirling out from the first air duct blows some of the welding slag around, and the protective plates are used to block the welding slag, so that the welding slag solidifies on the protective plates, thereby reducing the possibility of the welding slag falling on the surface of the workbench and the work-piece to be processed after losing power, improving the welding quality of the work-piece to be processed while reducing the cleaning difficulty of the workbench surface. The distance between the two side protective plates can be adjusted according to the welding position to improve the blocking effect of the side protective plates on the welding slag.

[0023] Optionally, the main protective plate is connected to the workbench through an electric push rod. The adjusting mechanism includes a motor, a bidirectional lead screw and two nuts. The bidirectional lead screw is arranged at the end of the main protective plate away from the workbench. The bidirectional lead screw is rotatably connected to the main protective plate. The motor is fixedly connected to the main protective plate. The output shaft of the motor is coaxially and fixedly connected to the bidirectional lead screw. Both of the two nuts are rotatably connected to the bidirectional lead screw. The bidirectional lead screw drives the two nuts to move towards each other or away from each other. The two nuts are respectively fixedly connected to the two side protective plates. Both the main protective plate and the side protective plates are magnetic plates. Baffles are detachably and fixedly connected to the sides of the main protective plate and the side protective plates close to the work-piece fixing seat.

[0024] By adopting the above technical solution, the main protection plate is connected to the workbench through an electric push rod, and the distance between the main protection plate and the workbench is adjustable. Both side protection plates are connected to the main protection plate. The motor is used to drive the bidirectional lead screw to rotate. During the rotation of the bidirectional lead screw, the two nuts are driven to move in the direction of approaching or separating from each other, so as to adjust the distance between the two side protection plates and improve the flexibility of the use of the protection plate. The main protection plate and the side protection plates are both magnetic plates. While using the protective gas swirling out of the first air duct to blow some of the welding slag around, the main protection plate and the side protection plates are used to adsorb the welding slag, further reducing the possibility of the welding slag falling on the surface of the workbench and the workpiece after losing power. A baffle is detachably and fixedly connected to the side of the main protection plate and the side protection plates close to the welding fixture seat, so that the welding slag is solidified on the baffle. After too much welding slag accumulates on the baffle, the baffle can be removed for cleaning or replacement.

[0025] Optionally, guide members are provided on the sides of the two side protection plates close to each other, and the two guide members are respectively located on both sides of the welding point. The guide members are used to direct the protective gas blown out of the first air duct and the second air duct to the main protection plate and the two side protection plates. The guide members are connected to the side protection plates through connecting rods. One end of the side protection plate close to the workbench is fixedly connected with a mounting plate. A transmission gear is arranged on the side of the mounting plate away from the guide member. The transmission gear is rotatably connected to the mounting plate. One end of the connecting rod is fixedly connected with a connecting member. The connecting rod is key-connected to the transmission gear and rotates synchronously with the transmission gear. The transmission gear is meshed with a transmission rack. A first electric push rod is fixedly connected to the side of the side protection plate away from the guide member. The telescopic direction of the piston rod of the first electric push rod is parallel to the side protection plate. The piston rod of the first electric push rod is fixedly connected with the transmission rack. A second electric push rod is fixedly connected to the side of the side protection plate away from the guide member. The piston rod of the second electric push rod is connected to the connecting rod through a transmission rod. The telescopic direction of the piston rod of the second electric push rod is perpendicular to the side protection plate. Both the first electric push rod and the second electric push rod are electrically connected to the robotic arm.

[0026] By adopting the above technical solution, guide members are arranged on both sides of the solder joint, and the guide members are used to guide the shielding gas blown out in the first air duct and the second air duct. After the shielding gas discharges the air in the welding area, the guide members are used to guide the shielding gas to the main protection plate and the two side protection plates, so as to blow part of the falling welding slag towards the main protection plate and the side protection plates, further reducing the possibility that the welding slag falls on the surface of the workbench and the workpiece after losing power. Through the guidance of the guide members, the shielding gas blown out in the first air duct and the second air duct can more evenly cover the welding area, effectively reducing oxidation and pollution during the welding process and improving the welding quality; the guide members are connected to the side protection plates through connecting rods, and the robotic arm is electrically connected to the first electric push rod. During the welding process, as the position of the solder joint changes, the robotic arm will adjust the welding angle of the welding torch. The robotic arm transmits a signal to the first electric push rod, and the first electric push rod drives the connecting rod to rotate through the cooperation of the transmission rack and the transmission gear, so as to drive the guide member to rotate, so that the orientation of the guide member changes with the change of the welding angle of the welding torch, thereby reducing the influence of the change of the welding angle on the flow guiding effect of the guide member; the introduction of the first electric push rod and the second electric push rod enables the guide member to be adjusted in the horizontal and vertical directions according to the welding requirements, further improving the welding quality and efficiency. The first electric push rod and the second electric push rod are both electrically connected to the robotic arm, realizing the synchronous control of the welding process and the adjustment of the protection plate, simplifying the operation process and improving the automation level.

[0027] In summary, the present application includes at least one of the following beneficial technical effects:

[0028] By arranging a flow guiding member in the first air duct, after the air pump pours the shielding gas in the gas storage tank into the first air duct, a part of the shielding gas flows into the flow guiding groove of the flow guiding member, and after being guided by the flow guiding member, the shielding gas spirally flows out of the first air duct, forming a swirling flow around the periphery of the welding nozzle. Most of the welding slag flies obliquely towards the first air duct. The shielding gas spirally flowing out of the first air duct blows away the welding slag splashing into the first air duct, thereby reducing the possibility that the welding slag enters the gap between the inner wall of the sleeve and the outer wall of the welding nozzle, causing deposition and solidification, resulting in a narrowing of the air flow channel and affecting the smoothness of the air flow, and further affecting the welding effect of the welding robot; in addition, there is a gap between the flow guiding member and the welding nozzle, and part of the shielding gas flows out of the first air duct through the gap between the flow guiding member and the welding nozzle and discharges the air in the welding area, effectively preventing the air from polluting the molten pool during the welding process, reducing oxidation and impurity generation, and ensuring the welding effect;

[0029] By winding an annular excitation coil around the outer side of the sleeve along the circumferential direction of the sleeve, a magnetic field is generated at one end of the sleeve close to the welding nozzle after the annular excitation coil is energized. Since the welding slag is also a magnetic substance, after the welding slag enters the magnetic field generated by the energization of the annular excitation coil, it deflects away from the welding nozzle under the combined action of the Lorentz force and the magnetic force, facilitating the protective gas flowing out in a spiral to blow away the welding slag splashing into the first air duct, and further reducing the possibility of the welding slag entering the first air duct;

[0030] By arranging guiding members on both sides of the welding point, the guiding members are used to guide the protective gas blown out from the first air duct and the second air duct. After the protective gas discharges the air in the welding area, the guiding members are used to guide the protective gas to the main protective plate and the two side protective plates, so as to blow some of the falling welding slag towards the main protective plate and the side protective plates, further reducing the possibility of the welding slag falling on the workbench and the surface of the workpiece after losing power. Through the guidance of the guiding members, the protective gas blown out from the first air duct and the second air duct can more evenly cover the welding area, effectively reducing oxidation and pollution during the welding process and improving the welding quality; the guiding members are connected to the side protective plates through connecting rods, and the robotic arm is electrically connected to the first electric push rod. During the welding process, as the position of the welding point changes, the robotic arm will adjust the welding angle of the welding torch. The robotic arm transmits a signal to the first electric push rod, and the first electric push rod drives the connecting rod to rotate through the cooperation of the transmission rack and the transmission gear, thereby driving the guiding member to rotate, so that the orientation of the guiding member changes with the change of the welding angle of the welding torch, thereby reducing the influence of the change of the welding angle on the flow guiding effect of the guiding member; the introduction of the first electric push rod and the second electric push rod enables the guiding member to be adjusted in the horizontal and vertical directions according to the welding requirements, further improving the welding quality and efficiency. The first electric push rod and the second electric push rod are both electrically connected to the robotic arm, realizing the synchronous control of the welding process and the adjustment of the protective plate, simplifying the operation process and improving the automation level. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The schematic embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation to the present application. In the drawings:

[0032] Figure 1 is the overall structural schematic diagram of the embodiment of the present application;

[0033] Figure 2 is the structural schematic diagram of the sleeve part in the embodiment of the present application;

[0034] Figure 3 is the structural schematic diagram of the welding structure part in the embodiment of the present application;

[0035] Figure 4 is the structural schematic diagram of the protective part in the embodiment of the present application;

[0036] Figure 5 It is a schematic diagram of the gas flow direction of the first air passage and the second air passage part in the embodiment of the present application;

[0037] Figure 6 It is a schematic structural diagram of the adjustment mechanism part in the embodiment of the present application;

[0038] Figure 7 is Figure 1 an enlarged view of part A in

[0039] Reference numerals: 100, robotic arm; 200, welding mechanism; 210, sleeve; 211, outer tube; 212, inner tube; 213, first air passage; 214, second air passage; 220, welding torch; 221, welding nozzle; 230, flow guiding member; 231, flow guiding groove; 240, annular excitation coil; 250, protective member; 251, first baffle; 252, second baffle; 260, limiting block; 270, bolt; 300, workbench; 310, workpiece fixing seat; 400, main protection plate; 500, side protection plate; 600, adjustment mechanism; 610, motor; 620, bidirectional lead screw; 630, nut; 700, baffle; 800, guiding member; 810, connecting rod; 820, driving gear; 830, driving rack; 840, first electric push rod; 850, second electric push rod; 860, transmission rod. Detailed implementation manners

[0040] For a clearer explanation of the overall concept of the present application, the following is a further detailed description of the present application in conjunction with the attached Figure 1 - Figure 7 drawings.

[0041] In the following description, many specific details are set forth in order to fully understand the present application. However, the present application may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present application is not limited by the specific embodiments disclosed below. It should be noted that, without conflict, the embodiments of the present application and the features in each embodiment may be combined with each other.

[0042] In the present application, unless otherwise clearly defined and limited, the terms "installed", "connected", "connected", "fixed" and other terms should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or a communication; it may be directly connected, or indirectly connected through an intermediate medium, and may be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0043] The embodiment of the present application discloses a welding robot. Refer toFigure 1 A welding robot includes a robotic arm 100, a welding mechanism 200, and a workbench 300. The welding mechanism 200 is connected to the workbench 300 through the robotic arm 100, and the robotic arm 100 is used to drive the welding mechanism 200 to move in multiple directions.

[0044] Referring to Figure 1 、 Figure 2 and Figure 3 The welding mechanism 200 includes a gas supply assembly, a sleeve 210, a welding torch 220, and an electromagnetic guiding assembly. The sleeve 210 is sleeved outside the nozzle 221 of the welding torch 220, and a first air passage 213 is provided between the sleeve 210 and the nozzle 221. A flow guiding member 230 is provided in the first air passage 213. The flow guiding member 230 is sleeved outside the nozzle 221 and is fixedly connected to the sleeve 210. A plurality of flow guiding grooves 231 are formed in the flow guiding member 230. The flow guiding grooves 231 are spirally formed with the axis of the sleeve 210 as the axis, and there is a gap between the flow guiding member 230 and the nozzle 221. The gas supply assembly includes a gas storage tank and an air pump. The gas storage tank is used to store shielding gas. The intake end of the air pump is communicated with the gas storage tank, and the outlet end of the air pump is communicated with the first air passage 213. The electromagnetic guiding assembly includes an annular excitation coil 240 wound around the circumference of the sleeve 210, and the annular excitation coil 240 is electrically connected to the power supply of the welding torch 220.

[0045] When welding a workpiece, after the air pump pours the shielding gas in the gas storage tank into the first air passage 213, a part of the shielding gas flows into the flow guiding grooves 231 of the flow guiding member 230. After being guided by the flow guiding member 230, the shielding gas spirally flows out of the first air passage 213, forming a swirling flow on the periphery of the nozzle 221. Most of the welding slag flies obliquely towards the first air passage 213. The shielding gas that spirally flows out of the first air passage 213 blows away the welding slag splashing towards the first air passage 213, thereby reducing the possibility that the welding slag enters the gap formed between the inner wall of the sleeve 210 and the outer wall of the nozzle 221, causing deposition and solidification, resulting in a narrowing of the air flow channel and affecting the smoothness of the air flow, and further affecting the welding effect of the welding robot. After the annular excitation coil 240 is energized, a magnetic field is generated at one end of the sleeve 210 close to the nozzle 221. Since the welding slag is also a magnetic substance, after the welding slag enters the magnetic field generated by the energization of the annular excitation coil 240, it deflects in the direction away from the nozzle 221 under the combined action of the Lorentz force and the magnetic force, facilitating the shielding gas flow that spirally flows out to blow away the welding slag splashing into the first air passage 213, further reducing the possibility of the welding slag entering the first air passage 213.

[0046] In addition, there is a gap between the flow guiding member 230 and the nozzle 221. Part of the shielding gas flows out of the first air passage 213 through the gap between the flow guiding member 230 and the nozzle 221 and discharges the air in the welding area, effectively preventing the air from polluting the molten pool during the welding process, reducing oxidation and impurity generation, and ensuring the welding effect.

[0047] Referring to Figure 2 、 Figure 3 and Figure 5 , the sleeve 210 includes an inner tube 212 and an outer tube 211. The outer tube 211 is coaxially sleeved outside the inner tube 212, and the outer tube 211 is fixedly connected to the inner tube 212. The first air passage 213 is located between the inner tube 212 and the welding nozzle 221, and the flow guiding member 230 is fixedly connected to the inner tube 212. The annular excitation coil 240 is sleeved outside the outer tube 211, and the annular excitation coil 240 is fixedly connected to the outer tube 211.

[0048] By sleeving the annular excitation coil 240 outside the outer tube 211, the double-layer sleeve 210 structure can, to a certain extent, reduce the influence of the high temperature generated during the welding process on the annular excitation coil 240 and improve the service life of the annular excitation coil 240.

[0049] A second air passage 214 is provided between the outer tube 211 and the inner tube 212, and the air outlet end of the air pump is communicated with the second air passage 214. By providing the second air passage 214 between the outer tube 211 and the inner tube 212, the air pump pumps the protective gas into the second air passage 214, and the protective gas in the second air passage 214 flows out from one end of the outer tube 211 close to the welding nozzle 221, further improving the air discharge efficiency in the welding area; in addition, during the flow of the protective gas in the second air passage 214, the heat transfer between the outer tube 211 and the inner tube 212 is further reduced, reducing the possibility of affecting the working effect of the annular excitation coil 240 due to the high temperature generated during the welding process.

[0050] Referring to Figure 3 and Figure 4 , a protective member 250 is provided on the outer tube 211. The protective member 250 is located on the side of the annular excitation coil 240 close to the welding nozzle 221, and the protective member 250 is used to block the splashing welding slag. The protective member 250 includes a first baffle 251. The first baffle 251 is sleeved on the outer tube 211 and the first baffle 251 is perpendicular to the axis of the outer tube 211. The outer extension of the first baffle 251 is fixedly connected to a second baffle 252, and the second baffle 252 is inclined towards the direction close to the annular excitation coil 240.

[0051] By providing the protective member 250 on the side of the annular excitation coil 240 close to the welding nozzle 221, since the magnetic force generated after the annular excitation coil 240 is energized will attract the welding slag, the protective member 250 is used to block the welding slag splashing towards the annular excitation coil 240, so that the welding slag solidifies on the side wall of the protective member 250. While reducing the possibility of the welding slag splashing onto the annular excitation coil 240, the splashing welding slag is collected, reducing the possibility of the welding slag falling back onto the welded part, and improving the service life of the annular excitation coil and the processing quality of the welded part.

[0052] The protective part 250 is detachably and fixedly connected to the outer tube 211. The first baffle 251 is slidably connected to the outer tube 211. A limit block 260 is arranged on the outer tube 211. The limit block 260 is located on the side of the annular excitation coil 240 close to the welding nozzle 221. The limit block 260 is used to limit the sliding of the first baffle 251 along the outer tube 211. Threads are provided on the side wall of the outer tube 211, and a nut is threadedly connected to the outer tube 211. The first baffle 251 is clamped between the nut and the limit block 260.

[0053] After the welding robot is used for a period of time, the protective part 250 can be separated from the outer tube 211 for cleaning to remove the welding slag attached to its surface. The protective part 250 is convenient to clean; the nut and the limit block 260 are used in cooperation to lock the protective part 250, and the protective part 250 is convenient to disassemble and assemble, further improving the convenience of cleaning the protective part 250.

[0054] Refer to Figure 1 、 Figure 6 and Figure 7 , a welding part fixing seat is fixedly connected to the workbench 300. The welding part fixing seat is used to fix the welding part. A plurality of protective plates are installed on the outside of the welding part fixing seat. The protective plates include a main protective plate 400 and two side protective plates 500. The main protective plate 400 is located on the side of the welding part fixing seat away from the robotic arm 100. The two side protective plates 500 are connected to the side of the main protective plate 400 close to the welding part fixing seat. The side protective plate 500 is perpendicular to the main protective plate 400, and the side protective plate 500 is slidably connected to the main protective plate 400. Both the main protective plate 400 and the side protective plate 500 are perpendicular to the workbench 300. An adjusting mechanism is installed on the main protective plate 400. The adjusting mechanism is used to adjust the distance between the two side protective plates 500.

[0055] The main protective plate 400 is connected to the workbench 300 through an electric push cylinder. The adjusting mechanism includes a motor 610, a bidirectional lead screw 620 and two nuts 630. The bidirectional lead screw 620 is arranged at one end of the main protective plate 400 away from the workbench 300. The bidirectional lead screw 620 is rotatably connected to the main protective plate 400. The motor 610 is fixedly connected to the main protective plate 400. The output shaft of the motor 610 is coaxially and fixedly connected to the bidirectional lead screw 620. Both nuts 630 are rotatably connected to the bidirectional lead screw 620. The bidirectional lead screw 620 drives the two nuts 630 to move towards each other or away from each other. The two nuts 630 are respectively fixedly connected to the two side protective plates 500. Both the main protective plate 400 and the side protective plate 500 are magnetic plates. A baffle 700 is detachably and fixedly connected to the side of the main protective plate 400 and the side protective plate 500 close to the welding part fixing seat.

[0056] By arranging a main protection plate 400 and side protection plates 500 on the circumferential side of the workpiece to be processed, during the welding process, the shielding gas swirling out from the first air passage 213 blows some welding slag around, and the protection plates are used to block the welding slag, so that the welding slag solidifies on the protection plates, thereby reducing the possibility that the welding slag falls on the surface of the workbench 300 and the workpiece to be processed after losing power. While improving the welding quality of the workpiece to be processed, the cleaning difficulty of the surface of the workbench 300 is reduced. The main protection plate 400 is connected to the workbench 300 through an electric push rod, and the distance between the main protection plate 400 and the workbench 300 is adjustable. Both side protection plates 500 are connected to the main protection plate 400. By driving the bidirectional lead screw 620 to rotate with the motor 610, during the rotation of the bidirectional lead screw 620, the two nuts 630 are driven to move in the direction of approaching or separating from each other, so as to adjust the distance between the two side protection plates 500, improve the flexibility of the use of the protection plates, and the distance between the two side protection plates 500 can be adjusted according to the welding position to improve the blocking effect of the side protection plates 500 on the welding slag. The main protection plate 400 and the side protection plates 500 are both magnetic plates. While using the shielding gas swirling out from the first air passage 213 to blow some welding slag around, the main protection plate 400 and the side protection plates 500 are used to adsorb the welding slag, further reducing the possibility that the welding slag falls on the surface of the workbench 300 and the workpiece to be processed after losing power. A baffle 700 is detachably and fixedly connected to the side of the main protection plate 400 and the side protection plates 500 close to the welding part fixing seat, so that the welding slag solidifies on the baffle 700. After too much welding slag accumulates on the baffle 700, the baffle 700 can be removed for cleaning or replacement.

[0057] Refer to Figure 6 and Figure 7, on one side of the two side protection plates 500 close to each other, guiding members 800 are provided. The two guiding members 800 are respectively located on both sides of the welding point. The guiding members 800 are used to guide the protective gas blown out from the first air duct 213 and the second air duct 214 to the main protection plate 400 and the two side protection plates 500. The guiding members 800 are connected to the side protection plates 500 through connecting rods 810. One end of the side protection plate 500 close to the workbench 300 is fixedly connected with a mounting plate. On the side of the mounting plate away from the guiding member 800, a transmission gear 820 is provided. The transmission gear 820 is rotatably connected to the mounting plate. One end of the connecting rod 810 is fixedly connected with a connecting member. The connecting rod 810 is key-connected to the transmission gear 820. The connecting rod 810 and the transmission gear 820 rotate synchronously. The transmission gear 820 is meshed with a transmission rack 830. On the side of the side protection plate 500 away from the guiding member 800, a first electric push rod 840 is fixedly connected. The telescopic direction of the piston rod of the first electric push rod 840 is parallel to the side protection plate 500. The piston rod of the first electric push rod 840 is fixedly connected with the transmission rack 830. On the side of the side protection plate 500 away from the guiding member 800, a second electric push rod 850 is fixedly connected. The piston rod of the second electric push rod 850 is connected to the connecting rod 810 through a transmission rod 860. The telescopic direction of the piston rod of the second electric push rod 850 is perpendicular to the side protection plate 500. Both the first electric push rod 840 and the second electric push rod 850 are electrically connected to the robotic arm 100.

[0058] By arranging the guiding members 800 on both sides of the welding point, using the guiding members 800 to guide the protective gas blown out from the first air duct 213 and the second air duct 214, after the protective gas discharges the air in the welding area, using the guiding members 800 to guide the protective gas to the main protection plate 400 and the two side protection plates 500, so as to blow some of the falling welding slag towards the main protection plate 400 and the side protection plates 500, further reducing the possibility of the welding slag falling on the workbench 300 and the surface of the workpiece after losing power. Through the guidance of the guiding members 800, the protective gas blown out from the first air duct 213 and the second air duct 214 can more evenly cover the welding area, effectively reducing oxidation and pollution during the welding process and improving the welding quality.

[0059] The guiding member 800 is connected to the side protection plate 500 through the connecting rod 810. The robotic arm 100 is electrically connected to the first electric push rod 840. During the welding process, as the position of the welding point changes, the robotic arm 100 adjusts the welding angle of the welding torch 220. The robotic arm 100 transmits a signal to the first electric push rod 840. The first electric push rod 840 drives the connecting rod 810 to rotate through the cooperation of the transmission rack 830 and the transmission gear 820, thereby driving the guiding member 800 to rotate, so that the orientation of the guiding member 800 changes with the change of the welding angle of the welding torch 220, thus reducing the influence of the change of the welding angle on the flow guiding effect of the guiding member 800; The introduction of the first electric push rod 840 and the second electric push rod 850 enables the guiding member 800 to be adjusted in the horizontal and vertical directions according to the welding requirements, further improving the welding quality and efficiency. The first electric push rod 840 and the second electric push rod 850 are both electrically connected to the robotic arm 100, realizing the synchronous control of the welding process and the adjustment of the protection plate, simplifying the operation process and improving the automation level.

[0060] What is not described in this application can be realized by adopting or referring to the existing technology.

[0061] Each embodiment in this specification is described in a progressive manner. For the same or similar parts among the embodiments, reference can be made to each other. Each embodiment focuses on the differences from other embodiments.

[0062] The above are all the preferred embodiments of this application. The protection scope of this application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A welding robot, comprising a robotic arm (100), a welding mechanism (200) and a workbench (300), wherein the welding mechanism (200) is connected to the workbench (300) through the robotic arm (100), and is characterized in that: The welding mechanism (200) includes a gas supply assembly, a sleeve (210) and a welding torch (220). The sleeve (210) is sleeved outside the nozzle (221) of the welding torch (220). A first air passage (213) is provided between the sleeve (210) and the nozzle (221). A flow guiding member (230) is provided in the first air passage (213). The flow guiding member (230) is sleeved outside the nozzle (221). The flow guiding member (230) is fixedly connected to the sleeve (210). A plurality of flow guiding grooves (231) are formed in the flow guiding member (230). The flow guiding grooves (231) are spirally formed with the axis of the sleeve (210) as the axis. There is a gap between the flow guiding member (230) and the nozzle (221). The gas supply assembly includes a gas storage tank and an air pump. The gas storage tank is used for storing protective gas. The intake end of the air pump is communicated with the gas storage tank. The outlet end of the air pump is communicated with the first air passage (213); A weldment fixing seat (310) is provided on the workbench (300). The weldment fixing seat (310) is used for fixing the weldment. A plurality of protective plates are provided outside the weldment fixing seat (310). The protective plates include a main protective plate (400) and two side protective plates (500). The main protective plate (400) is located on the side of the weldment fixing seat (310) away from the robotic arm (100). The two side protective plates (500) are connected to the side of the main protective plate (400) close to the weldment fixing seat (310). The side protective plates (500) are perpendicular to the main protective plate (400). The side protective plates (500) are slidably connected to the main protective plate (400). The main protective plate (400) and the side protective plates (500) are both perpendicular to the workbench (300). An adjusting mechanism is provided on the main protective plate (400). The adjusting mechanism is used for adjusting the distance between the two side protective plates (500); The main protective plate (400) is connected to the workbench (300) through an electric push cylinder. The adjusting mechanism (600) includes a motor (610), a bidirectional lead screw (620) and two nuts (630). The bidirectional lead screw (620) is arranged at one end of the main protective plate (400) away from the workbench (300). The bidirectional lead screw (620) is rotatably connected to the main protective plate (400). The motor (610) is fixedly connected to the main protective plate (400). The output shaft of the motor (610) is coaxially and fixedly connected to the bidirectional lead screw (620). The two nuts (630) are both rotatably connected to the bidirectional lead screw (620). The bidirectional lead screw (620) drives the two nuts (630) to move towards each other or away from each other. The two nuts (630) are respectively fixedly connected to the two side protective plates (500). The main protective plate (400) and the side protective plates (500) are both magnetic plates. A baffle (700) is detachably and fixedly connected to the side of the main protective plate (400) and the side protective plates (500) close to the weldment fixing seat (310).

2. The welding robot according to claim 1, wherein: An electromagnetic guiding assembly is provided on the sleeve (210). The electromagnetic guiding assembly includes an annular exciting coil (240) wound circumferentially around the sleeve (210), and the annular exciting coil (240) is electrically connected to the power supply of the welding torch (220).

3. A welding robot according to claim 2, characterized in that: The sleeve (210) includes an inner tube (212) and an outer tube (211). The outer tube (211) is coaxially sleeved outside the inner tube (212), and the outer tube (211) is fixedly connected to the inner tube (212). The first air passage (213) is located between the inner tube (212) and the welding nozzle (221). The flow guiding member (230) is fixedly connected to the inner tube (212). The annular exciting coil (240) is sleeved outside the outer tube (211), and the annular exciting coil (240) is fixedly connected to the outer tube (211).

4. A welding robot according to claim 3, characterized in that: A second air passage (214) is provided between the outer tube (211) and the inner tube (212), and the air outlet end of the air pump is communicated with the second air passage (214).

5. A welding robot according to claim 3, characterized in that: A protective member (250) is provided on the outer tube (211). The protective member (250) is located on the side of the annular exciting coil (240) close to the welding nozzle (221), and the protective member (250) is used to block the splashing welding slag.

6. The welding robot according to claim 5, characterized in that: The protective member (250) includes a first baffle (251). The first baffle (251) is sleeved on the outer tube (211) and the first baffle (251) is perpendicular to the axis of the outer tube (211). The outer extension of the first baffle (251) is fixedly connected with a second baffle (252), and the second baffle (252) is inclined towards the direction close to the annular exciting coil (240).

7. The welding robot according to claim 6, characterized in that: The protective member (250) is detachably and fixedly connected to the outer tube (211). The first baffle (251) is slidably connected to the outer tube (211). A limiting block (260) is provided on the outer tube (211). The limiting block (260) is located on the side of the annular exciting coil (240) close to the welding nozzle (221). Threads are provided on the side wall of the outer tube (211), and a nut is threadedly connected to the outer tube (211). The first baffle (251) is clamped between the nut and the limiting block (260).

8. A welding robot according to claim 1, characterized in that: On one side of each of the two side protection plates (500) that are close to each other, a guiding member (800) is provided. The two guiding members (800) are respectively located on both sides of the welding point. The guiding member (800) is used to direct the protective gas blown out from the first air duct (213) and the second air duct (214) towards the main protection plate (400) and the two side protection plates (500). The guiding member (800) is connected to the side protection plate (500) through a connecting rod (810). One end of the side protection plate (500) close to the workbench (300) is fixedly connected with a mounting plate. On the side of the mounting plate away from the guiding member (800), a transmission gear (820) is provided. The transmission gear (820) is rotatably connected to the mounting plate. One end of the connecting rod (810) is fixedly connected with a connecting member. The connecting rod (810) is key-connected to the transmission gear (820). The connecting rod (810) rotates synchronously with the transmission gear (820). The transmission gear (820) is meshed with a transmission rack (830). On the side of the side protection plate (500) away from the guiding member (800), a first electric push rod (840) is fixedly connected. The telescopic direction of the piston rod of the first electric push rod (840) is parallel to the side protection plate (500). The piston rod of the first electric push rod (840) is fixedly connected with the transmission rack (830). On the side of the side protection plate (500) away from the guiding member (800), a second electric push rod (850) is fixedly connected. The piston rod of the second electric push rod (850) is connected to the connecting rod (810) through a transmission rod (860). The telescopic direction of the piston rod of the second electric push rod (850) is perpendicular to the side protection plate (500). Both the first electric push rod (840) and the second electric push rod (850) are electrically connected to the robotic arm (100).

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