Wire feeder, welding head and sealed welding apparatus

Abstract

The application provides a wire feeding system, a welding head and a sealed welding device, relates to the technical field of welding devices, and solves the technical problem of complicated wire reel replacement caused by the installation structure of the wire reel in the welding head. The wire feeding system comprises a driving mechanism, a locking assembly, a mounting piece and a disc shell internally provided with a wire reel and a wire feeding assembly. The mounting piece is fixed in the welding head, the locking assembly is connected with the mounting piece, a guide part is arranged on the disc shell, a guide groove is arranged on the mounting piece, and the guide part is in sliding connection with the guide groove. When the guide part is located in the guide groove, the locking assembly can be clamped with or separated from the disc shell under the action of external force. When the locking assembly is clamped with the disc shell, the disc shell is fixedly connected with the mounting piece, and the driving mechanism is in transmission connection with the wire feeding assembly. The disc shell can be quickly disassembled and assembled, and compared with the direct disassembly of the wire reel, the wire feeding system is more suitable for the operation of a manipulator, and is especially suitable for welding operation in a sealed chamber.

Description

Technical Field

[0001] This invention relates to the field of welding equipment technology, and in particular to a wire feeding system, a welding head, and a sealing welding device. Background Technology

[0002] When the workpiece to be welded contains hazardous materials that are prone to diffusion and leakage, the welding process must be carried out in a sealed chamber. Equipment maintenance in the sealed chamber needs to be carried out remotely by a robotic arm equipped in the sealed chamber, while the operator operates from outside the sealed chamber.

[0003] The wire feeding system in the prior art includes a wire spool with welding wire wound on it. When the welding wire on the spool is used up, the wire spool is manually removed from the welding head and then replaced with a new wire spool.

[0004] The applicant has discovered that the prior art has at least the following technical problems: because the operation of removing the welding wire spool from the welding head is quite delicate, when the welding head is used in an environment where there is a certain dose of nuclear radiation or a confined space where operators cannot enter, the robotic arm is difficult to replace manual labor and it is difficult to remove the welding wire spool from the welding head, resulting in difficulty in replacing the welding wire. Summary of the Invention

[0005] The purpose of this invention is to provide a wire feeding system, a welding head, and a sealed welding device to solve the technical problem of cumbersome wire spool replacement caused by the installation structure of the wire spool in the welding head in the prior art. The various technical effects of the preferred solutions among the many technical solutions provided by this invention are detailed below.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] The wire feeding system provided by this invention includes a drive mechanism, a locking assembly, a mounting component, and a housing containing a wire spool and a wire feeding assembly, wherein:

[0008] The mounting component is fixed inside the welding head, the locking assembly is connected to the mounting component, the disc shell is provided with a guide part, the mounting component is provided with a guide groove, and the guide part is slidably connected to the guide groove;

[0009] When the guide portion is located in the guide groove, the locking assembly can engage or disengage with the disc shell under external force. When the locking assembly engages with the disc shell, the disc shell is fixedly connected to the mounting component, and the drive mechanism is drivenly connected to the wire feeding assembly.

[0010] Preferably, the locking assembly includes a handle, a screw, and a locking block, wherein:

[0011] The handle and the locking block are respectively fixed to both ends of the screw. The screw is threadedly connected to the mounting part. The guide part is provided with a locking slot. When the guide part is in place in the guide groove, rotating the handle in the forward direction allows the locking block to pass through the guide groove and insert into the locking slot. Rotating the handle in the reverse direction allows the locking block to disengage from the locking slot.

[0012] Preferably, the wire feeding assembly includes a driven wheel, a wire feeding wheel, and a clamping wheel rotatably connected within the disc housing, wherein: the driven wheel is fixedly connected to the wire feeding wheel, and there is a wire feeding gap between the wire feeding wheel and the clamping wheel for the welding wire to pass through;

[0013] The driving mechanism includes a driving device and a driving wheel connected by a drive. When the guide part is engaged in the guide groove, the driving wheel meshes with the wire feeding wheel.

[0014] The housing is also provided with a wire alignment wheel, which is located in the wire feeding direction of the wire feeding assembly. The wire alignment wheel is distributed on both sides of the wire feeding gap, and at least one of the wire feeding wheels is a movable wire feeding wheel. When the movable wire feeding wheel moves in the horizontal direction, it can adjust the gap between itself and the wire feeding wheel on the other side, so that the welding wire passing through the wire feeding gap is in a straight line.

[0015] Preferably, the disc shell is provided with a guide nozzle, which is connected to the wire feeding gap; the mounting part is provided with a wire feeding tube, and when the guide part is engaged in the guide groove, the guide nozzle is inserted into the wire feeding tube.

[0016] The present invention also provides a welding head, including a head body, a welding torch connected to the head body, and the wire feeding system described above, wherein the wire feeding system is connected to at least one of the welding torches;

[0017] The welding torch includes a welding torch body, a rotation drive device, a clamping rod, a tungsten electrode, and a clamping head, wherein:

[0018] The welding torch body has a shaft cavity, the clamping rod is located in the shaft cavity, the clamping head is fixedly connected to the lower part of the welding torch body, and the inner cavity of the clamping head is connected to the shaft cavity;

[0019] The inner cavity of the clamp head has an inner conical surface, and the lower end of the clamp rod is provided with an outer conical surface. The inner diameter of the inner conical surface and the outer diameter of the outer conical surface gradually decrease in the direction away from the driving device.

[0020] The rotation drive device is connected to the clamp rod and is used to drive the clamp rod to move along the axial direction of the welding gun body; when the outer conical surface moves to a position that fits against the inner conical surface, the clamp rod clamps and fixes the tungsten electrode; when the outer conical surface moves to a position that separates from the inner conical surface, the tungsten electrode can be removed from the clamp rod.

[0021] Preferably, the welding torch includes a nut portion, and the rotation drive device is driven to the nut portion to drive the nut portion to rotate; the nut portion is threaded to the shaft cavity, and the nut portion abuts against or is connected to the tungsten electrode clamp, and the nut portion can push the clamp rod to move linearly toward the clamp head.

[0022] Preferably, the lower end of the clamping rod is provided with two or more claws, the claws are evenly distributed around the axis of the clamping rod, the outer conical surface is located on the outer periphery of all the claws, and when the outer conical surface is in contact with the inner conical surface, all the claws come together and clamp and fix the tungsten electrode.

[0023] Preferably, the welding head further includes a rotating body, an internal drive device, a horizontal welding torch, and a spot welding torch, wherein:

[0024] The internal drive device is fixed inside the machine head body and is drivenly connected to the rotating machine body so that the rotating machine body can rotate relative to the machine head body. The rotating machine body is provided with a positioning structure for positioning with the workpiece to be welded.

[0025] The spot welding gun is fixed at the axial position of the rotating body, and the horizontal welding gun is connected to the wire feeding system, and both are fixedly connected to the side of the rotating body.

[0026] The present invention also provides a sealing welding device, including a sealing chamber, a suspension device and the above-mentioned welding head;

[0027] The suspension device includes a lifting mechanism, which is configured to reciprocate in the vertical direction and is connected to the machine head body via a flexible component;

[0028] The sealed chamber is equipped with a maintenance station and a welding station, and the welding head can move between the maintenance station and the welding station.

[0029] Preferably, the suspension device further includes a cantilever beam, a rotating column, a fixed support column, a lifting drive device, and a rotation drive device, wherein:

[0030] The rotating column is rotatably connected to the top of the fixed support column, and the rotation drive device is driven to drive the rotating column to rotate in the horizontal plane.

[0031] The cantilever beam is fixedly connected to the rotating column, and a vertical slide rail is provided at the end of the cantilever beam opposite to the rotating column. The lifting mechanism is slidably connected to the vertical slide rail.

[0032] The lifting drive device is connected to a wheel. The top of the rotating column and the end of the cantilever beam connected to the lifting mechanism are both equipped with fixed pulleys. A traction rope is wound around the wheel. The traction rope passes around the fixed pulley and is fixedly connected to the lifting mechanism. When the wheel rotates in the forward or reverse direction, it can drive the lifting mechanism to rise or fall.

[0033] The wire feeding system, welding head, and sealed welding equipment provided by this invention have the following advantages compared with the prior art: When installing the welding wire spool, the robotic arm can grip the spool housing, allowing the guide portion of the spool housing to slide into the guide groove of the mounting component. After the spool housing and the mounting component are properly engaged, the robotic arm rotates the locking assembly, which engages with the spool housing. Simultaneously, the spool housing is fixedly connected to the mounting component, and the drive mechanism is connected to the wire feeding assembly, completing the installation of the welding wire spool. When it is necessary to disassemble the welding wire spool, the robotic arm rotates the locking assembly, separating the locking assembly from the spool housing. The robotic arm then grips the spool housing and slides it out of the guide groove of the mounting component, thus disassembling the spool housing. This wire feeding system, through the above structure, can quickly disassemble and assemble the spool housing. Compared with directly disassembling the welding wire spool, it is more suitable for robotic arm operation, especially for welding operations in a sealed chamber.

[0034] This welding head and sealed welding equipment, equipped with the aforementioned wire feeding system, can improve the efficiency of wire spool replacement, and is particularly suitable for welding operations within a sealed chamber. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 This is a schematic diagram of the wire feeding system;

[0037] Figure 2 This is a schematic diagram of the internal structure of the disk shell;

[0038] Figure 3 This is a structural schematic diagram of the mounting component from one perspective;

[0039] Figure 4 This is a structural schematic diagram of the mounting component from another perspective;

[0040] Figure 5 This is a schematic diagram of the wire feeding assembly;

[0041] Figure 6 This is a schematic diagram of the welding head structure;

[0042] Figure 7 This is a cross-sectional view of the welding head;

[0043] Figure 8 This is a cross-sectional structural diagram of a spot welding torch and a horizontal welding torch;

[0044] Figure 9 This is a schematic diagram of the clamping rod;

[0045] Figure 10 This is a schematic diagram of the overall structure of the sealing welding equipment;

[0046] Figure 11 This is a top view of the sealing welding equipment;

[0047] Figure 12 This is a schematic diagram of the cooperation structure between the suspension device and the welding head;

[0048] Figure 13 This is a structural schematic diagram of a barrel body to be welded in the prior art.

[0049] In the diagram: 1. Wire feeding system; 11. Wire reel; 111. Guide section; 112. Bayonet; 113. Guide nozzle; 12. Mounting component; 121. Wire feeding tube; 122. Guide groove; 13. Welding wire reel; 14. Locking assembly; 141. Handle; 142. Screw; 143. Locking block; 15. Wire feeding assembly; 151. Driven wheel; 152. Wire feeding wheel; 153. Pressure wheel; 16. Drive mechanism; 161. Drive device; 162. Drive wheel; 17. Welding wire; 181. Wire straightening wheel; 182. Adjusting screw; 183. Moving block; 19. Clamping block; 2. Welding head; 21. Head body; 31. Spot welding torch; 32. Horizontal welding torch; 301. Welding torch body; 302. Rotation drive. Device; 303, clamping rod; 3030, chuck; 3031, outer conical surface; 304, tungsten electrode; 305, clamping head; 3051, inner conical surface; 306, nut; 41, rotating body; 411, positioning guide plate; 42, internal drive device; 5, sealing chamber; 501, welding station; 502, maintenance station; 6, suspension device; 61, lifting mechanism; 62, cantilever beam; 63, rotating column; 64, fixed support column; 65, lifting drive device; 66, rotation drive device; 67, wheel; 68, fixed pulley; 69, traction rope; 7, flexible component; 8, counterweight device; 9, monitoring device; 100, barrel body; 200, cover; 300, spot weld; 400, horizontal weld. Detailed Implementation

[0050] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be described in detail below. Obviously, the described embodiments are merely some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0051] In the description of this invention, it should be understood that the terms "center," "length," "width," "height," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and "side," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0052] This invention provides a wire feeding system, a welding head, and a sealed welding device, which can improve the efficiency of wire spool replacement and is particularly suitable for welding operations in a sealed chamber.

[0053] The following is combined with Figures 1-13 The technical solution provided by this invention will be described in more detail below.

[0054] Example 1

[0055] like Figures 1-5 As shown, this embodiment provides a wire feeding system 1, including a drive mechanism 16, a locking assembly 14, a mounting component 12, and a housing 11 with a welding wire spool 13 and a wire feeding assembly 15 inside. The mounting component 12 is fixed inside the welding head 2, the locking assembly 14 is connected to the mounting component 12, the housing 11 has a guide portion 111, and the mounting component 12 has a guide groove 122. The guide portion 111 and the guide groove 122 are slidably connected. When the guide portion 111 is located within the guide groove 122, the locking assembly 14 can engage or disengage from the housing 11 under external force. When the locking assembly 14 engages with the housing 11, the housing 11 is fixedly connected to the mounting component 12, and the drive mechanism 16 is drively connected to the wire feeding assembly 15.

[0056] The aforementioned mounting component 12 is located inside the welding head 2, and the disc housing 11 is fixedly connected to the mounting component 12, that is, the disc housing 11 is fixedly connected to the welding head 2. (See also...) Figure 1 A damping disc shaft is rotatably connected inside the disc housing 11, and a welding wire spool 13 is sleeved on the damping disc shaft. The welding wire spool 13 can be replaced after the disc housing 11 is disassembled.

[0057] See Figure 1 and Figure 2 As shown, a clamping block 19 is provided on the disk shell 11 for the robotic arm to grip. The robotic arm can move the disk shell 11 by grabbing the clamping block 19.

[0058] In this embodiment of the wire feeding system 1, when installing the welding wire spool 13, the robot arm can grip the spool housing 11, causing the guide portion 111 of the spool housing 11 to slide into the guide groove 122 of the mounting component 12. After the spool housing 11 and the mounting component 12 are in place, the robot arm turns the locking assembly 14, which engages with the spool housing 11. At the same time, the spool housing 11 is fixedly connected to the mounting component 12, and the drive mechanism 16 is connected to the wire feeding assembly 15, thus completing the installation of the welding wire spool 13. When it is necessary to disassemble the welding wire spool 13, the robot arm turns the locking assembly 14, which separates from the spool housing 11. The robot arm grips the spool housing 11 and slides it out of the guide groove 122 of the mounting component 12, thus disassembling the spool housing 11. This wire feeding system 1, through the above structure, can quickly disassemble and assemble the spool housing 11. Compared with the method of directly disassembling the welding wire spool 13, it is more suitable for robot operation, especially for welding operations in the sealed chamber 5.

[0059] As an alternative implementation, see [link to implementation details]. Figure 1 , Figure 3 and Figure 4 As shown, the guide part 111 has a strip-shaped structure, and the guide part 111 and the guide groove 122 are vertically arranged; the locking assembly 14 includes a handle 141, a screw 142 and a locking block 143, wherein: the handle 141 and the locking block 143 are respectively fixed to both ends of the screw 142. Preferably, the handle 141, the screw 142 and the locking block 143 are integrally formed structures, which are structurally stable. The screw 142 is threadedly connected to the mounting part 12. The guide part 111 is provided with a locking slot 112. When the guide part 111 is in place in the guide groove 122, rotating the handle 141 in the forward direction allows the locking block 143 to pass through the guide groove 122 and insert into the locking slot 112. Rotating the handle 141 in the reverse direction allows the locking block 143 to disengage from the locking slot 112.

[0060] Combination Figure 2 and Figure 3 As shown, when the robot arm rotates the handle 141 in the forward direction, the locking block 143 moves toward the bayonet 112 and can be inserted into the bayonet 112 because the screw 142 is threadedly connected to the mounting part 12. At this time, the mechanical fixation of the disc shell 11 and the mounting part 12 can be completed. When the robot arm rotates the handle 141 in the reverse direction, the locking block 143 moves away from the bayonet 112 and can disengage from the bayonet 112. At this time, the robot arm can pull the disc shell 11 out of the mounting part 12. After the disc shell 11 is moved out of the sealed chamber 5, the disc shell 11 with a new welding wire disc 13 can be replaced.

[0061] In this embodiment, while the disc shell 11 is fixedly connected to the mounting component 12, the drive mechanism 16 and the wire feeding assembly 15 can be connected for transmission.

[0062] Specifically, participate Figures 3-5 As shown, the wire feeding assembly 15 includes a driven wheel 151, a wire feeding wheel 152, and a clamping wheel 153 rotatably connected within the housing 11. The driven wheel 151 is fixedly connected to the wire feeding wheel 152, and a wire feeding gap exists between the wire feeding wheel 152 and the clamping wheel 153 for the welding wire to pass through. The drive mechanism 16 includes a drive device 161 and a drive wheel 162 connected by a drive mechanism. When the guide part 111 is engaged in the guide groove, the drive wheel 162 meshes with the wire feeding wheel 152. A wire straightening wheel 181 is also provided within the housing 11. The wire straightening wheel 181 is located in the wire feeding direction of the wire feeding assembly 15 and is distributed on both sides of the wire feeding gap. At least one side of the wire feeding wheel 152 is a movable wire feeding wheel 152. When the movable wire feeding wheel 152 moves horizontally, it can adjust the gap between itself and the other side of the wire feeding wheel 152, thereby ensuring that the welding wire passing through the wire feeding gap is in a straight line.

[0063] See Figure 3 and Figure 5 The drive wheel 162 passes through the side wall of the mounting member 12. When the guide part 111 slides in along the guide groove, the weight of the disc shell 11 is sufficient to complete the engagement between the wire feeding wheel 152 and the drive wheel 162 from contact to full meshing. This structure enables the transmission connection between the drive mechanism 16 and the wire feeding assembly 15, as well as the fixed connection between the disc shell 11 and the mounting member 12, and the disc shell 11 and the mounting member 12 can be quickly replaced.

[0064] The aforementioned drive device 161 can be a motor that drives the drive wheel 162 to rotate. When the guide part 111 is in place in the guide groove, the drive wheel 162 meshes with the wire feeding wheel 152. The drive wheel 162 drives the wire feeding wheel 152 to rotate. The wire feeding wheel 152 cooperates with the pressing wheel 153 to feed the welding wire.

[0065] See Figure 5 An adjusting screw 182 is threaded onto the housing 11. A movable wire feeding wheel 152 is rotatably connected to a moving block 183. The end of the adjusting screw 182 abuts against the moving block 183. The adjusting bolt can push the moving block 183 to move under external force, thereby adjusting the gap between the two wire feeding wheels 152, so that the welding wire passing through the wire feeding gap is in a straight line, ensuring stable wire feeding.

[0066] As an alternative implementation, see [link to implementation details]. Figure 1 and Figure 2As shown, a guide nozzle 113 is provided on the housing 11, and the guide nozzle 113 is connected to the wire feeding gap; a wire feeding tube 121 is provided on the mounting part 12. When the guide part 111 is in place in the guide groove 122, the guide nozzle 113 is inserted into the wire feeding tube 121. The mating structure of the guide nozzle 113 and the wire feeding tube 121 can ensure that the welding wire moves smoothly in the wire feeding system 1. The welding wire removed from the wire feeding gap in the wire feeding assembly can enter the wire feeding tube 121 through the guide nozzle 113 and be transported to the corresponding welding gun by the wire feeding tube 121.

[0067] In this embodiment, the wire feeding system 1 replaces the welding wire spool 13 by changing the spool housing 11. During replacement, the robotic arm lifts the spool housing 11 using the clamping block 19. Using the guide portion 111 and the guide groove, the spool housing 11 and the mounting component 12 are smoothly fitted into place. Then, the weight of the spool housing 11 completes the engagement of the drive wheel 162 and the wire feeding wheel 152. Finally, a locking mechanism locks the spool housing 11 and the mounting component 12.

[0068] Example 2

[0069] See Figure 6 and Figure 7 This embodiment provides a welding head 2, including a head body 21, a welding torch connected to the head body 21, and the aforementioned wire feeding system 1, wherein the wire feeding system 1 is connected to at least one welding torch.

[0070] In tungsten inert gas (TIG) welding of 304 stainless steel, prolonged welding or ineffective shielding gas can lead to severe burn-off of the 304 electrode, affecting weld quality. Therefore, frequent replacement of the 304 electrode is necessary to ensure good weld quality. Currently, automated TIG welding operations typically involve manual replacement of the 304 electrode. This method not only impacts production efficiency but is also unsuitable for special environments, such as those with radiation exposure or confined spaces where operators cannot access them.

[0071] For the above issues, please refer to Figure 8 and Figure 9The welding torch of this embodiment includes a welding torch body 301, a clamping rod 303, a tungsten electrode 304, and a clamping head 305. The clamping rod 303 is located in the welding torch body 301 and can move along the axis of the welding torch body 301. The clamping head 305 is fixed inside the welding torch body 301 and sleeved on the lower end of the clamping rod 303. The inner cavity of the clamping head 305 has an inner conical surface 3051, and the lower end of the clamping rod 303 is provided with an outer conical surface 3031. The inner diameter of the inner conical surface 3051 and the outer diameter of the outer conical surface 3031 gradually decrease along the direction away from the driving device 161. When the outer conical surface 3031 moves to a position that fits against the inner conical surface 3051, the clamping rod 303 clamps and fixes the tungsten electrode 304. When the outer conical surface 3031 moves to a position that separates from the inner conical surface 3051, the tungsten electrode 304 can be removed from the clamping rod 303.

[0072] See Figure 8 and Figure 9 The welding torch also includes a rotation drive device 302. The welding torch body 301 has a shaft cavity, the clamping rod 303 is located in the shaft cavity, the clamping head 305 is fixedly connected to the lower part of the welding torch body 301, and the inner cavity of the clamping head 305 is connected to the shaft cavity. The rotation drive device 302 is connected to the clamping rod 303 for driving the clamping rod 303 to move along the axial direction of the welding torch body 301.

[0073] Specifically, the rotation drive device 302 is connected to the welding torch body 301 via a connecting flange and is fixed with screws.

[0074] The aforementioned rotary drive device 302 can be an actuator capable of generating rotary motion, such as a rotary cylinder, a motor, or a hydraulic rotary cylinder. For example, the rotary drive device 302 can be a rotary cylinder, driven by compressed gas at a certain pressure to rotate, thereby clamping and fixing the tungsten electrode 304; or, the rotary drive device 302 can be a stepper motor, driven by controlled pulse current to rotate, thereby clamping and fixing the tungsten electrode 304; or, the rotary drive device 302 can be a hydraulic rotary cylinder, controlled by controlling the flow rate of hydraulic oil to rotate, thereby clamping and fixing the tungsten electrode 304.

[0075] The above structure enables the clamping rod 303 to clamp or release the tungsten electrode 304. When the clamping rod 303 does not clamp the tungsten electrode 304, the robot can hold the tungsten electrode 304 and remove it from the welding torch. The replacement of the tungsten electrode 304 can be completed quickly without the need for the operator to enter the sealed chamber 5.

[0076] As an optional implementation, the welding torch includes a nut portion 306, and a rotation drive device 302 is driven to the nut portion 306 to drive the nut portion 306 to rotate; the nut portion 306 is threadedly connected to the shaft cavity, and the nut portion 306 abuts against or is connected to the clamping rod 303, and the nut portion 306 can push the clamping rod 303 to move linearly toward the clamping head 305.

[0077] The connector is fixed to the output shaft of the rotary drive device 302 by an anti-rotation screw; the rotary drive device 302 (an actuator that can generate rotary motion, such as a rotary cylinder, motor or hydraulic rotary cylinder) rotates and drives the connector to rotate, while simultaneously driving the nut to rotate.

[0078] In this embodiment, the rotation drive device 302 can drive the nut to rotate, and the nut converts the rotational motion into the linear motion of the clamping rod 303. Then, the tungsten electrode 304 is clamped and fixed by the outer conical surface 3031 and the inner conical surface 3051 of the clamping rod 303 and the clamping head 305 in contact.

[0079] In this embodiment, since the nut 306 and the welding torch body 301 are threaded, the rotational motion of the nut can be converted into a linear motion of the clamping rod 303 downward along the axis of the welding torch body 301, pushing the clamping rod 303 to press against the clamping head 305. Since the contact surface between the tungsten electrode 304 clamp and the clamping head is a conical structure, the downward thrust can be converted into a clamping force to fix the tungsten electrode 304, thereby playing the role of clamping the tungsten electrode 304. The rotational drive device 302 (an actuator that can generate rotational motion, such as a rotary cylinder, motor, or hydraulic rotary cylinder) rotates in the opposite direction to complete the release action of clamping the tungsten electrode 304.

[0080] When the outer conical surface 3031 of the clamping rod 303 and the inner conical surface 3051 of the clamping head 305 do not press against each other, as an optional embodiment, see [link to embodiment]. Figure 9 The lower end of the clamping rod 303 is provided with two or more claws 3030. The claws 3030 are evenly distributed around the axis of the clamping rod 303. The outer conical surface 3031 is located on the outer periphery of all the claws 3030. When the outer conical surface 3031 and the inner conical surface 3051 are in contact, all the claws 3030 come together and clamp and fix the tungsten electrode 304.

[0081] Combination Figure 8 and Figure 9When the outer conical surface 3031 of the clamping rod 303 and the inner conical surface 3051 of the clamping head 305 are pressed against each other, the jaws 3030 are held together by the pressure of the inner conical surface 3051 of the clamping head 305, thus firmly clamping and fixing the tungsten electrode 304. When the outer conical surface 3031 of the clamping rod 303 and the inner conical surface 3051 of the clamping head 305 are separated from each other, the jaws 3030 lose the pressure of the inner conical surface 3051 of the clamping head 305, and the interaction force between the jaws 3030 is insufficient to clamp and fix the tungsten electrode 304. At this time, the robot can pull out the tungsten electrode 304.

[0082] As an alternative implementation, see [link to implementation details]. Figure 6 and Figure 7 As shown, the welding head 2 also includes a rotating body 41, an internal drive device 42, a horizontal welding torch 32, and a spot welding torch 31. The internal drive device 42 is fixed inside the head body 21 and is drivenly connected to the rotating body 41 so that the rotating body 41 can rotate relative to the head body 21. The rotating body 41 is provided with a positioning structure for positioning with the workpiece to be welded. The spot welding torch 31 is fixed at the axial position of the rotating body 41. The horizontal welding torch 32 is connected to the wire feeding system 1, and both are fixedly connected to the side of the rotating body 41.

[0083] Both the horizontal welding torch 32 and the spot welding torch 31 adopt the structure of the aforementioned welding torch. The internal drive device 42 can be an electric motor. The internal drive device 42 drives the rotating body 41 to rotate, thereby driving the horizontal welding torch 32 and the spot welding torch 31 to perform welding work.

[0084] See Figure 6 and Figure 7 As shown, the positioning structure on the rotating body 41 can be a positioning guide plate 411 to accurately position the welding head 2 and the workpiece to be welded, with a positioning accuracy within 0.5mm. After the rotating body 41 is positioned with the workpiece to be welded, the spot welding torch 31 and / or the horizontal welding torch 32 can weld the workpiece.

[0085] See Figure 13 As shown, Figure 13 This is a schematic diagram of the structure of a barrel 100 to be welded in the prior art. The barrel 100 is welded using tungsten inert gas (TIG) welding with 304 stainless steel. The vent hole of the lid 200 is welded using non-filler wire spot welding; the horizontal weld 400 between the lid 200 and the barrel 100 is welded using filler wire horizontal welding. The weld between the lid 200 and the barrel 100 is a butt circumferential weld, which requires single-sided welding and double-sided forming during the welding process. To ensure the weld quality on the back side (i.e., the junction with the lid 200), before welding, back protective argon gas needs to be injected into the cavity through the vent hole of the lid 200. Welding is carried out after the cavity is filled with argon gas to prevent oxidation of the back side of the weld during the welding process.

[0086] In this embodiment, the positioning guide plate 411 on the welding head 2 can be positioned with the barrel 100. After positioning, the horizontal welding torch 32 is used to weld the horizontal weld 400 of the barrel 100, and the spot welding torch 31 is used to weld the spot weld 300 of the barrel 100, thereby completing the sealing welding of the barrel 100 and improving the welding efficiency.

[0087] See Figure 12 As shown, a counterweight device 8 is provided on the rotating body 41. The counterweight device 8 and the horizontal welding torch 32 are located on opposite sides of the rotating body 41 to improve the structural balance. See also Figure 6 A monitoring device 9, such as a camera, is fixed on the rotating head to monitor the welding process, so that the staff outside the sealed chamber 5 can understand the welding situation.

[0088] Example 3

[0089] This embodiment provides a sealing welding device, see [link / reference] Figure 10 and Figure 11 As shown, the sealing welding equipment includes a sealing chamber 5, a suspension device 6, and the aforementioned welding head 2; the suspension device 6 includes a lifting mechanism 61, which is reciprocating in the vertical direction and is connected to the head body 21 via a flexible component 7; the sealing chamber 5 is provided with a maintenance station 502 and a welding station 501, and the welding head 2 can move between the maintenance station 502 and the welding station 501.

[0090] See Figure 11 As shown, a workpiece placement platform is provided on welding station 501 to fix the workpiece to be welded. A tungsten electrode 304 replacement device can be installed on maintenance station 502. The suspension device 6 drives the welding head 2 to move between the two stations. Figure 11 As shown.

[0091] See Figure 13 When the barrel 100 contains hazardous materials that are prone to diffusion and leakage, the welding process must be carried out inside the sealed chamber 5. Maintenance of the equipment inside the sealed chamber 5 also needs to be performed remotely via a robotic arm equipped in the sealed chamber 5 (operators operate from outside the sealed chamber 5). The sealed welding equipment in this embodiment is suitable for welding workpieces containing hazardous materials that are prone to diffusion and leakage.

[0092] There is a transfer crane (not shown in the figure) above the sealed chamber 5, which can be used to transfer the workpiece to be welded.

[0093] The function of the lifting mechanism 61 is to lower the welding head 2 for welding work, or to raise the welding head 2 to await the welding of the next workpiece. The head body 21 and the lifting mechanism 61 are connected by a flexible component 7, which can be a steel wire rope, etc. The structure of the flexible component 7 is such that when the lifting mechanism 61 descends to the point where the rotating body 41 just contacts the workpiece to be welded, if the rotating body 41 and the workpiece to be welded are not completely aligned, the flexible component 7 can assist in the self-adaptive positioning of the positioning guide plate 411 and the workpiece to be welded.

[0094] As an alternative implementation, see [link to implementation details]. Figures 10-12 As shown, the suspension device 6 in this embodiment also includes a cantilever beam 62, a rotating column 63, a fixed support column 64, a lifting drive device 65, and a rotation drive device 66. The rotating column 63 is rotatably connected to the top of the fixed support column 64, and the rotation drive device 66 is driven by the rotating column 63 to drive the rotating column 63 to rotate in the horizontal plane. The cantilever beam 62 is fixedly connected to the rotating column 63, and a vertical slide rail is provided at the end of the cantilever beam 62 opposite to the rotating column 63. The lifting mechanism 61 is slidably connected to the vertical slide rail. The lifting drive device 65 is driven by a wheel 67. A fixed pulley 68 is provided at the top of the rotating column 63 and at the end of the cantilever beam 62 connected to the lifting mechanism 61. A traction rope 69 is wound around the wheel 67, and the traction rope 69 passes around the fixed pulley 68 and is fixedly connected to the lifting mechanism 61. When the wheel 67 rotates in the forward or reverse direction, it can drive the lifting mechanism 61 to rise or fall.

[0095] See Figure 12 Both the rotary drive device 66 and the lifting drive device 65 can be motors. The rotary drive device 66 and the lifting drive device 65 are placed outside the sealed chamber 5 in the operating corridor for easy maintenance (there is a dangerous atmosphere leak inside the sealed chamber 5, so operators should avoid entering as much as possible). Power is transmitted into the sealed chamber 5 through a through-wall connector, thereby driving the movement of their respective mechanisms.

[0096] See Figure 12 The output end of the rotary drive device 66 is equipped with a gear, and the outer periphery of the rotating column 63 is equipped with a gear ring. The gear meshes with the gear ring. When the rotary drive device 66 drives the gear to rotate, the rotating column 63 can rotate relative to the fixed support column 64. Thus, the welding head 2 can move between the maintenance station 502 and the welding station 501.

[0097] In this embodiment, the lifting mechanism 61 is driven by the lifting drive device 65 to retract the traction rope 69 (such as a steel wire rope), which can drive the welding head 2 to move in the high vertical direction. The rotation drive device 66 drives the rotating column 63 and the cantilever beam 62 to rotate, thereby driving the welding head 2 to move between the welding station 501 and the maintenance station 502.

[0098] The sealing welding equipment of this embodiment operates as follows during welding:

[0099] (1) When the workpiece to be welded has not been hoisted into the sealed chamber 5, the suspension device 6 suspends the welding head 2 in the maintenance position 502, which is the initial state of the welding system;

[0100] (2) Inside the sealed chamber 5, the crane lowers the workpiece to be welded onto the workpiece placement platform;

[0101] (3) The suspension device 6 drives the welding head 2 to move to the welding station 501, that is, above the workpiece to be welded;

[0102] (4) After the welding head 2 is transferred to the workpiece to be welded, the lifting mechanism 61 descends, so that the welding head 2 sits on the workpiece to be welded, completes the precise positioning, and starts the welding work.

[0103] The specific features, structures, or characteristics described in this specification may be combined in any suitable manner in one or more embodiments or examples.

[0104] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0105] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A seal welding apparatus characterized by comprising: The sealing chamber, the suspension device and the welding head are included. The welding head comprises a head body, a welding torch connected with the head body and a wire feeding system connected with at least one welding torch. The welding torch comprises a torch body, a rotating driving device, a clamping rod, a tungsten electrode and a clamping head, wherein: The torch body has a shaft cavity, the clamping rod is located in the shaft cavity, the clamping head is fixedly connected with the lower part of the torch body, and the inner cavity of the clamping head is communicated with the shaft cavity. The inner cavity of the clamping head has an inner taper surface, the lower end of the clamping rod is provided with an outer taper surface, and the inner diameter of the inner taper surface and the outer diameter of the outer taper surface gradually decrease in the direction away from the driving device. The rotating driving device is in transmission connection with the clamping rod and is used for driving the clamping rod to move along the axis direction of the torch body; when the outer taper surface moves to the position in abutment with the inner taper surface, the clamping rod clamps and fixes the tungsten electrode; when the outer taper surface moves to the position separated from the inner taper surface, the tungsten electrode can be taken out from the clamping rod. The wire feeding system comprises a driving mechanism, a locking assembly, a mounting piece and a disc shell internally provided with a wire disc and a wire feeding assembly, wherein: The mounting piece is fixed in the welding head, the locking assembly is connected with the mounting piece, a guide part is arranged on the disc shell, a guide groove is arranged on the mounting piece, and the guide part is in sliding connection with the guide groove. When the guide part is located in the guide groove, the locking assembly can be clamped with or separated from the disc shell under the action of external force; when the locking assembly is clamped with the disc shell, the disc shell is fixedly connected with the mounting piece, and the driving mechanism is in transmission connection with the wire feeding assembly. The wire feeding assembly comprises a driven wheel, a wire feeding wheel and a pressure wheel in rotation connection with the disc shell, wherein: the driven wheel is fixedly connected with the wire feeding wheel, and there is a wire feeding gap between the wire feeding wheel and the pressure wheel for the welding wire to pass through. The driving mechanism comprises a driving device and a driving wheel in driving connection; when the guide part is matched in place in the guide groove, the driving wheel is in engagement with the wire feeding wheel. The suspension device comprises a lifting mechanism, which is arranged in reciprocating movement in the vertical direction and is connected with the head body through a flexible piece. A maintenance station and a welding station are arranged in the sealing chamber, and the welding head can move between the maintenance station and the welding station.

2. The sealed weld apparatus of claim 1, wherein, The locking assembly comprises a handle, a screw rod and a clamping block, wherein: The handle and the clamping block are respectively fixed at two ends of the screw rod, the screw rod is in threaded connection with the mounting piece, a bayonet is arranged on the guide part, when the guide part is matched in place in the guide groove, the clamping block can be inserted into the bayonet by forward rotation of the handle, and the clamping block can be separated from the bayonet by reverse rotation of the handle.

3. The sealed weld apparatus of claim 1, wherein, The disc shell is further provided with a wire straightening wheel, which is located in the wire feeding direction of the wire feeding assembly, and is distributed on both sides of the wire feeding gap. At least one side of the wire feeding wheel is a movable wire feeding wheel. When the movable wire feeding wheel moves in the horizontal direction, the gap between the movable wire feeding wheel and the wire feeding wheel on the other side can be adjusted, so that the welding wire passing through the wire feeding gap is in a straight line.

4. The sealed weld apparatus of claim 3, wherein, The disc shell is provided with a guide nozzle, which is in communication with the wire feeding gap. The mounting member is provided with a wire feeding pipe. When the guide part is fitted in place in the guide groove, the guide nozzle is inserted into the wire feeding pipe.

5. The sealed weld apparatus of claim 1, wherein, The welding torch comprises a nut part, the rotating drive device is drivingly connected with the nut part for driving the nut part to rotate, the nut part is threadedly connected with the shaft cavity, the nut part abuts against or is connected with the tungsten electrode clamp, and the nut part can drive the clamp rod to move linearly towards the direction of the clamp head.

6. The sealed weld apparatus of claim 1, wherein, The lower end of the clamp rod is provided with two or more than two clamping jaws, the clamping jaws are uniformly distributed around the axis of the clamp rod, the outer conical surface is located on the outer periphery of all the clamping jaws, and when the outer conical surface is fitted with the inner conical surface, all the clamping jaws are closed together to clamp and fix the tungsten electrode.

7. The sealed weld apparatus of claim 1, wherein, The welding head further comprises a rotating body, an inner drive device, a horizontal welding torch and a spot welding torch. The inner drive device is fixed in the head body and drivingly connected with the rotating body, so that the rotating body can rotate relative to the head body. The rotating body is provided with a positioning structure for positioning a workpiece to be welded. The spot welding torch is fixed at the axis position of the rotating body, and the horizontal welding torch is in communication with the wire feeding system and fixedly connected to the side of the rotating body.

8. The sealed weld apparatus of claim 1, wherein, The suspension device further comprises a cantilever beam, a rotating column, a fixed support column, a lifting drive device and a rotating drive device. The rotating column is rotationally connected to the top end of the fixed support column, and the rotating drive device is drivingly connected with the rotating column for driving the rotating column to rotate in the horizontal plane. The cantilever beam is fixedly connected with the rotating column, and the end of the cantilever beam away from the rotating column is provided with a vertical slide rail. The lifting mechanism is slidingly connected with the vertical slide rail. The lifting drive device is drivingly connected with a wheel body. The top of the rotating column and the end of the cantilever beam connected with the lifting mechanism are both provided with a fixed pulley. A traction rope is wound around the wheel body. The traction rope is fixedly connected with the lifting mechanism by passing through the fixed pulley. The wheel body can drive the lifting mechanism to ascend or descend when it rotates forward or reversely.

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