A welding robot for automobile parts processing

Abstract

The application discloses a welding robot for automobile part machining, which comprises a machining table, a mechanical arm main body arranged on the machining table, a welding device main body arranged on the mechanical arm main body, symmetrical helical spring sheets arranged on the machining table, a rotating assembly arranged on a moving assembly, and the rotating assembly being connected with the helical spring sheets and used for driving the axially rotating of the clamped and positioned welding workpiece. The helical spring sheet of the application adopts a lockable flexible structure, cooperates with an elastic connecting layer, can be flexibly inserted into the inside of welding workpieces with different shapes such as straight tubes and bent pipes, and can be deformed along the inner wall of the workpiece to perfectly fit the inner wall of the bent pipe to realize stable clamping, effectively solve the pain points of the inconvenience of clamping and the easy rotation deviation of welding at the bent pipe of the automobile exhaust pipe, realize the accurate clamping and positioning of hollow welding workpieces with different specifications and different shapes, and have strong adaptability. Meanwhile, the coaxiality of the butt joint of the two groups of workpieces is ensured, the positioning precision is improved, and the welding misplacement is avoided.

Description

Technical Field

[0001] This invention belongs to the field of automotive parts processing technology, and more specifically, relates to a welding robot for automotive parts processing. Background Technology

[0002] Welding is one of the core processing steps in automotive parts manufacturing, especially for hollow structures such as tubular and cylindrical parts. These parts require circumferential welding of two workpieces, and the welding accuracy and workpiece positioning stability directly affect the processing quality and service life of the parts. Currently, existing automotive parts welding robots have many technical deficiencies in workpiece positioning and welding fit, making it difficult to meet the demands of high-precision welding. On the one hand, existing welding robots mostly use rigid clamps for workpiece positioning, which have poor adaptability and can only be used for clamping and positioning cylindrical automotive parts (such as straight exhaust pipes). They cannot be flexibly adjusted according to hollow welding workpieces of different specifications and shapes. Especially for tubular parts with many bends, such as automotive exhaust pipes, rigid clamps are difficult to fit against the inner wall of the bend for stable clamping during circumferential welding operations. This makes it difficult to clamp and fix the workpiece at the bend, and the workpiece is prone to rotation and displacement during the welding process, resulting in welding misalignment, uneven welds, and seriously affecting the processing quality. In addition, the clamping force of existing positioning mechanisms is difficult to control precisely, which can easily damage the inner wall of the welded workpiece. At the same time, the clamping and releasing operations are cumbersome and affect the processing efficiency. Summary of the Invention

[0003] To address the shortcomings of existing technologies, the present invention aims to provide a welding robot for processing automotive parts.

[0004] To achieve the aforementioned objectives, the technical solution adopted by this invention includes: a processing table, on which a robotic arm body is mounted, and on which a welding device body is mounted; symmetrically arranged helical spring sheets on the processing table, the helical spring sheets being lockable flexible structures that can be inserted into the welding workpiece in the initial state; an elastic connecting layer is provided in the internal gap of the helical spring sheets, the elastic connecting layer being used to connect the coils of the helical spring sheets; the welding workpiece is sleeved on the outside of the helical spring sheets; symmetrically arranged moving components on the processing table, the moving components being used to drive the helical spring sheets and the welding workpiece to move horizontally, when the two sets of moving components approach each other, the two sets of welding workpieces abut against each other, the helical spring sheets adapt and deform along the internal path of the welding workpiece, and after the two sets of helical spring sheets contact, they contract and close under force, fitting against the inner wall of the welding workpiece, thereby achieving clamping and positioning of the welding workpiece; a rotating component is provided on the moving components, the rotating component being connected to the helical spring sheets, the rotating component being used to drive the clamped and positioned welding workpiece to rotate axially, cooperating with the welding device body to complete the welding.

[0005] Preferably, one of the helical spring sheets has an auxiliary insertion ring at its end, and the other helical spring sheet has an auxiliary insertion groove at its end. When the two sets of helical spring sheets come into contact, the auxiliary insertion ring and the auxiliary insertion groove are inserted and positioned to assist in the docking of the two sets of helical spring sheets.

[0006] Preferably, the helical spring sheet is provided with a friction layer on the outside, which matches the inner wall of the welded workpiece to increase the frictional force in contact with the inner wall of the welded workpiece.

[0007] Preferably, the moving component includes a guide rail device symmetrically arranged on the processing table, a guide rail slider slidably fitted on the guide rail device, a slot on the guide rail slider, and a moving plate disposed on two slots at the same end; the guide rail device is used to provide moving guidance for the guide rail slider, the guide rail slider is used to drive the moving plate to move, and the slot is used to fix the moving plate.

[0008] Preferably, the rotating assembly includes a motor mounted on a movable plate, a rotating plate at the output end of the motor, and a mounting ring fixedly mounted at the end of the rotating plate away from the motor. The mounting ring is connected to a helical spring plate. The motor is used to drive the rotating plate to rotate, and the rotating plate is used to drive the mounting ring and the helical spring plate to rotate.

[0009] Preferably, the rotating plate is also provided with an electric push rod, and the output end of the electric push rod is provided with a mounting plate; a fixed plate is provided at the end of the helical spring sheet away from the rotating plate, and the mounting plate and the fixed plate are connected by a connecting assembly; the electric push rod is used to drive the mounting plate to move, and the connecting assembly is used to connect the mounting plate and the fixed plate, so as to realize the retraction and reset of the helical spring sheet.

[0010] Preferably, the connecting assembly includes a connecting ring disposed at the end of the mounting plate, a connecting rope disposed on the connecting ring, the connecting rope extending into the interior of the helical spring sheet; a lifting lug disposed inside the fixing plate, the connecting rope being connected to the lifting lug; the connecting ring is used to fix the connecting rope, the connecting rope is used to transmit tension, and the lifting lug is used to connect the connecting rope to the fixing plate.

[0011] Preferably, the helical spring sheet has support rods equidistantly arranged inside, and the end of the support rod is provided with a guide ring, which matches the connecting rope; the support rod is used to support the guide ring, and the guide ring is used to guide the movement of the connecting rope.

[0012] Compared with the prior art, the advantages of the present invention include: (1) The spiral spring sheet adopts a lockable flexible structure and is combined with an elastic connecting layer. It can be flexibly inserted into the inside of welding workpieces of different shapes such as straight cylinders and bent pipes, and adapts to the deformation along the inner wall of the workpiece. It perfectly fits the inner wall of the bent pipe to achieve stable clamping, effectively solving the pain points of inconvenient clamping and easy rotation and displacement during welding at the bend of the automobile exhaust pipe. It can achieve precise clamping and positioning of hollow welding workpieces of different specifications and shapes, with strong adaptability. The cooperation between the auxiliary insertion ring and the auxiliary insertion groove ensures the coaxiality of the two sets of workpieces (straight cylinder to straight cylinder, straight cylinder to bent pipe, bent pipe to bent pipe) and further improves the positioning accuracy and avoids welding misalignment. (2) The rotating component can drive the welded workpiece to rotate axially after clamping and positioning. Combined with the welding device body and vision system on the main body of the robotic arm, the full circumference welding can be completed without the robotic arm moving a large range, which greatly improves the welding efficiency. The vision system monitors the welding status in real time and automatically adjusts the welding parameters to ensure uniform weld and accurate welding, and reduce welding defects. (3) The spiral spring sheet can automatically retract and reset. With the help of the moving component, the docking, clamping and picking up of the workpiece is convenient and no manual adjustment is required. The friction layer buffers the clamping force to avoid damage to the inner wall of the workpiece and protect the surface quality of the workpiece. The electric push rod and the connecting component work together to achieve precise control of the spiral spring sheet and improve the ease of operation. (4) The elastic connection layer is made of high temperature resistant material, which is suitable for high temperature welding environment and is not easily damaged; the lockable structure of the helical spring sheet and the setting of the friction layer ensure that the workpiece is positioned stably during the welding process and does not slip; the setting of the battery and controller realizes the coordinated and automated operation of each component and improves the stability of equipment operation. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this application 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 recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the structure of a welding robot for processing automotive parts according to the present invention; Figure 2 This is a schematic diagram of the structure between two helical spring plates in a welding robot for processing automotive parts according to the present invention; Figure 3 This is a schematic diagram of the structure between the moving component and the helical spring sheet in a welding robot for processing automotive parts according to the present invention; Figure 4 This is a schematic diagram of the structure between the rotating component and the helical spring sheet in a welding robot for processing automotive parts according to the present invention; Figure 5 This is a schematic diagram of the structure between the electric push rod and the helical spring plate in a welding robot for processing automotive parts according to the present invention; Figure 6 This is a schematic diagram of the structure between the electric push rod and the fixed plate in a welding robot for processing automotive parts according to the present invention; Figure 7 This is one of the structural schematic diagrams of the welding workpiece in a welding robot for processing automotive parts according to the present invention; Figure 8 This is the second schematic diagram of the structure of the welding workpiece in a welding robot for processing automotive parts according to the present invention.

[0015] Figure label: 11. Processing table; 12. Main body of robotic arm; 13. Main body of welding device; 14. Helical spring sheet; 15. Elastic connecting layer; 16. Auxiliary insertion slot; 17. Auxiliary insertion ring; 18. Welding workpiece; 21. Guide rail device; 22. Guide rail slider; 23. Moving plate; 24. Slot; 31. Motor; 32. Turning plate; 33. Mounting ring; 41. Electric push rod; 42. Fixed plate; 43. Mounting plate; 44. Connecting rope; 45. Connecting ring; 46. Support rod; 47. Guide ring; 48. Lifting lug. Detailed Implementation

[0016] In view of the shortcomings of the prior art, the inventors of this invention, through long-term research and extensive practice, have proposed the technical solution of this invention. The technical solution, its implementation process, and principles will be further explained below with reference to the accompanying drawings and specific implementation examples in the embodiments of this application.

[0017] It should be noted that the embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention. The described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, the present invention covers any substitutions, modifications, equivalent methods and solutions made on the spirit, principles and scope of the present invention as defined by the claims. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] In the description of this application, the terms "first," "second," "third," and similar words do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms "a" or "one," and similar words, do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising" or "including," and similar words, mean that the elements or objects preceding "comprising" or "including" encompass the elements or objects listed following "comprising" or "including," and their equivalents, but do not exclude other elements or objects. The terms "connected" or "linked," and similar words, are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect.

[0019] In the description of this application, the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used solely for the convenience of describing this application and for simplification, 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. Therefore, they should not be construed as limitations on this application. Furthermore, when using positional terms such as "both sides," "outer side," and "upper and lower," it should be understood that they are used only for ease of understanding and description, taking into account that the structure may be oriented to other positions.

[0020] In the description of this application, unless otherwise expressly specified and limited, the technical or scientific terms used shall have the ordinary meaning understood by a person with ordinary skills in the art to which this application pertains. Terms such as “installation,” “connection,” and “joining” shall be interpreted broadly, for example, as fixed connection, detachable connection, mating connection, or integral connection. For a person skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0021] The present invention aims to introduce and explain the structural composition of a welding robot for processing automotive parts and the cooperation relationship between the various components. Unless otherwise specified, the dimensions, materials and manufacturing processes of the various components of the welding robot for processing automotive parts in the present invention can be selected according to specific circumstances, and no special limitations or explanations are made here.

[0022] Furthermore, to provide the public with a better understanding of the present invention, certain specific details are described in detail in the following description of the invention. However, those skilled in the art will fully understand the invention even without these detailed descriptions.

[0023] Please see Figures 1-8A welding robot for processing automotive parts includes a processing table 11, which is made of high-strength cast iron with anti-slip and anti-rust treatment. The rectangular table provides stable support for all components of the robot. A multi-degree-of-freedom industrial robotic arm 12 is fixedly mounted at one end of the processing table 11, allowing for flexible adjustment of its angle and position. A welding device body 13 is fixedly mounted at its end. The welding device body 13 uses an arc welding device (other welding devices can also be used as needed; this is a mature technology and will not be elaborated here). It boasts high welding precision and uniform weld seams, enabling efficient butt welding of two sets of workpieces 18, particularly suitable for circumferential welding of curved sections of tubular workpieces such as automotive exhaust pipes. The robotic arm body 12 is equipped with a vision system (a mature technology and will not be elaborated here), including a high-definition camera and an image recognition module, electrically connected to a controller. This system can collect welding images (especially weld seams at curved sections) in real time and provide feedback, helping to improve welding precision and prevent deviations during curved pipe welding.

[0024] Please see Figures 1-8 The spiral spring sheet 14 and the elastic connecting layer 15 are connected. The spiral spring sheet 14 is made of high-strength spring steel and has a spiral structure. It is a lockable flexible structure with good elasticity, toughness and locking performance. In the initial state, the outer diameter is slightly smaller than the inner diameter of the welded workpiece 18, which can be easily inserted into the inside of welded workpieces 18 of different shapes such as straight cylinders and bent pipes (especially suitable for automotive exhaust pipe bends). Its flexible structure can perfectly fit the contour of the inner wall of the bend. The spiral spring sheet 14 is wrapped with a friction layer. The friction layer is made of high-temperature and wear-resistant rubber material, which fits tightly with the inner wall of the welded workpiece 18 (including the inner wall of the bend) to increase friction and prevent the workpiece from rotating and shifting during the welding of the bend. One of the spiral spring sheets 14 has an auxiliary insertion ring 17 integrally formed at its end, and the other spiral spring sheet 14 has an auxiliary insertion ring 17 integrally formed at its end. An auxiliary insertion groove 16 is provided at the end, which is precisely matched to ensure the coaxiality when the bend and the straight cylinder are connected, or when the bend and the bend are connected; the gap inside the helical spring plate 14 is filled with an elastic connecting layer 15. The elastic connecting layer 15 is made of high temperature resistant silicone material, which can be adapted to the high temperature welding environment. It is used to connect the structure of each coil of the helical spring plate 14, ensuring that each coil deforms synchronously. Even inside the bend, the helical spring plate 14 can conform to the contour of the bend and shrink, thereby enhancing the structural strength; support rods 46 are fixed at equal intervals inside the helical spring plate 14. The support rods 46 are made of rigid material and the end is fixed with a guide ring 47. The guide ring 47 is used to guide the connecting rope 44, ensuring that the connecting rope 44 moves smoothly when the helical spring plate 14 deforms inside the bend, without affecting the shrinkage and reset.

[0025] Please see Figures 1-8The moving component includes a guide rail device 21, a guide rail slider 22, a moving plate 23, and a slot 24. The guide rail device 21 adopts an industrial-grade linear guide rail, which is symmetrically fixed on the upper surface of the processing table 11, providing high guiding accuracy and smooth sliding. The guide rail slider 22 is slidably fitted on the guide rail device 21 and can move horizontally along the guide rail device 21. A U-shaped slot 24 is provided on its top. The moving plate 23 is made of stainless steel and spans across the slots 24 of the two guide rail sliders 22 fixed at the same end. It is firmly connected and can move synchronously with the guide rail sliders 22, and is used to install the rotating component.

[0026] Please see Figures 1-8 The rotating assembly includes a motor 31, a rotating plate 32, and a mounting ring 33. The motor 31 is a servo motor, fixedly mounted on the moving plate 23, and its speed is precisely controllable. The rotating plate 32 is made of rigid material and is fixedly connected to the output end of the motor 31. A battery and a controller (not shown in the figure) are fixedly mounted on the rotating plate 32. The battery is a rechargeable lithium battery used to power the electric push rod 41, and the controller is used to control the coordinated operation of each component. The mounting ring 33 is fixedly welded to the end of the rotating plate 32 away from the motor 31 and fixedly connected to the end of the helical spring plate 14 to transmit rotational force. The electric push rod 41 is also fixed on the rotating plate 32. The output end of the electric push rod 41 is fixedly mounted with the mounting plate 43. The end of the helical spring plate 14 away from the rotating plate 32 is fixedly mounted with a fixing plate 42. The mounting plate 43 and the fixing plate 42 are connected by a connecting assembly.

[0027] Please see Figures 1-8 The connecting assembly includes a connecting ring 45, a connecting rope 44, and a lifting lug 48. The connecting ring 45 is fixedly welded to the end of the mounting plate 43 and is used to fix the connecting rope 44. The connecting rope 44 is made of high-strength, high-temperature resistant steel wire rope, extends into the interior of the helical spring plate 14, and passes through each guide ring 47. The lifting lug 48 is fixedly installed inside the fixing plate 42 and is fixedly connected to the other end of the connecting rope 44. It is used to transmit the tension of the electric push rod 41 and drive the helical spring plate 14 to retract and reset.

[0028] Work process First, securely install the processing table 11 in the designated location in the workshop, ensuring a firm installation to prevent shaking during operation. Install the robotic arm body 12, welding device body 13, moving components, rotating components, and other components, connecting the electrical wiring of each component to ensure normal linkage between the controller, motor 31, electric push rod 41, robotic arm body 12, and vision system. Check the battery power to ensure the electric push rod 41 is powered normally. Then, according to the welding requirements, place the two sets of hollow welding workpieces 18 (which can both be straight cylinders or both bends) to be welded. The two sets of spiral spring plates 14 are respectively fitted outside the straight and curved sections of the exhaust pipe (such as the curved and straight sections of the exhaust pipe of a car). In the initial state, the spiral spring plates 14 are in a naturally extended state. After being inserted into the welded workpiece 18 (for curved workpieces, the spiral spring plates 14 need to be inserted along the contour of the curved pipe), they are not completely attached to the inner wall and only play a preliminary support role. The friction layer is in slight contact with the inner wall of the workpiece (including the inner wall of the curved pipe) to prevent the workpiece from slipping. In particular, the curved workpiece can be prevented from shaking due to its irregular shape by the flexible support of the spiral spring plates 14. The controller is activated to control the moving components. The guide rail slider 22 moves horizontally along the guide rail device 21, causing the moving plate 23, rotating component, helical spring plate 14, and welding workpiece 18 to move closer simultaneously. If it is a bend-to-straight pipe or bend-to-bend pipe connection, the moving components can precisely adjust the moving trajectory to ensure accurate alignment of the connection ends. As the two sets of moving components move closer to each other, the connection ends of the two sets of welding workpieces 18 gradually approach each other until they touch, completing the workpiece connection. Continuing to control the moving components to move closer to each other, the connection ends of the two sets of helical spring plates 14 contact each other, and the auxiliary insertion ring 17 is inserted into the auxiliary insertion slot 16. Inside, the two sets of helical spring plates 14 are precisely aligned to ensure coaxiality between the bent pipe and the straight pipe, and between the bent pipes themselves. At this time, the helical spring plates 14 are subjected to axial pressure and begin to adapt and deform along the internal path (outline of the straight pipe section or the bent pipe section) of the welded workpiece 18. Their helical structure gradually contracts, the spacing between each coil decreases, and the elastic connecting layer 15 deforms synchronously. Even the helical spring plates 14 inside the bent pipe can perfectly fit the inner wall of the bent pipe and contract. At the same time, the electric push rod 41 is activated, and the electric push rod 41 contracts, pulling the fixing plate 42 through the connecting component to assist the helical spring plates 14 in contracting. Until the helical spring plates 14 are completely closed and fully fit the inner wall of the welded workpiece 18 (including the inner wall of the bent pipe), the friction layer increases the friction with the inner wall of the workpiece, effectively preventing the workpiece from rotating or shifting during the welding of the bent pipe. The lockable structure of the helical spring plates 14 locks in place, completing the precise clamping and positioning of the two sets of welded workpieces 18 (including the bent pipe), ensuring that the workpiece does not shift during the welding process. After clamping and positioning are completed, the main body 12 of the robotic arm and the main body 13 of the welding device are started, and the main body 13 of the welding device is adjusted to the butt weld of the workpiece 18. Especially for the weld at the bend, the main body 12 of the robotic arm can flexibly adjust its angle to achieve precise alignment with the vision system. The vision system is started, and the high-definition camera collects weld images in real time (focusing on the weld at the bend). After the image recognition module analyzes and processes the images, it feeds back information such as position deviation and weld unevenness to the controller. The controller adjusts the angle and position of the main body 12 of the robotic arm to ensure that the main body 13 of the welding device is aligned with the weld. Then, the motor 31 is started, and the motor 31 drives the rotating plate 32 to rotate. The rotating plate 32 is driven by the mounting ring 33. The spiral spring plate 14 and the clamped and positioned welding workpiece 18 rotate synchronously axially. Even for bent workpieces, the spiral spring plate 14 can firmly clamp the workpieces and achieve smooth rotation. The rotation speed is precisely controlled by the controller. The main body 13 of the welding device starts and, in coordination with the rotation of the workpieces, completes the full circumference welding of the two sets of welding workpieces 18. It can efficiently complete the circumferential welding at the bend. During the welding process, the vision system monitors the weld status in real time. If a positional deviation or uneven weld is detected, the controller automatically adjusts the welding parameters and the workpiece rotation speed to ensure welding quality. The high temperature generated during the welding process is borne by the high-temperature resistant elastic connecting layer 15, which prevents it from softening and being damaged, and ensures the stable operation of the equipment. After welding is completed, the main body 13 of the welding device, the motor 31, and the vision system are shut down. The electric push rod 41 is extended to move the mounting plate 43, the connecting components are relaxed, and the tension on the fixed plate 42 is released. At the same time, the moving components are moved away from each other, the axial pressure between the two sets of helical spring plates 14 disappears, the locking state is released, and under the action of its own elasticity and elastic connecting layer 15, it gradually resets and returns to the initial extended state, separating from the inner wall (including the inner wall of the bend) of the welded workpiece 18. Even for bend workpieces, the helical spring plates 14 can be smoothly moved out of the bend without jamming. After the helical spring plates 14 are fully reset, the welded workpiece (including bend workpieces, such as automotive exhaust pipe bend fittings) is removed from the helical spring plates 14 to complete the processing. Finally, the moving components are reset, the electric push rod 41 is reset, and the equipment returns to the initial state, waiting for the next batch of workpieces to be processed.

[0029] It should be understood that the above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. It should not be considered that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, several simple deductions or substitutions can be made without departing from the concept of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the protection scope of the present invention.

Claims

1. A welding robot for processing automotive parts, comprising a processing table (11), a robotic arm body (12) mounted on the processing table (11), and a welding device body (13) mounted on the robotic arm body (12), characterized in that: The processing table (11) is symmetrically provided with helical spring sheets (14), which are lockable flexible structures that can be inserted into the welding workpiece (18) in the initial state; an elastic connecting layer (15) is provided in the gap inside the helical spring sheet (14), which is used to connect the coils of the helical spring sheet (14); the welding workpiece (18) is sleeved on the outside of the helical spring sheet (14); the processing table (11) is symmetrically provided with moving components, which are used to drive the helical spring sheet (14) and the welding workpiece (18) to move in water. When the two sets of moving components approach each other, the two sets of welding workpieces (18) abut against each other. The spiral spring sheet (14) adapts and deforms along the internal path of the welding workpiece (18). After the two sets of spiral spring sheets (14) come into contact, they are forced to contract and close, fitting against the inner wall of the welding workpiece (18) to achieve clamping and positioning of the welding workpiece (18). The moving component is provided with a rotating component, which is connected to the spiral spring sheet (14). The rotating component is used to drive the clamped and positioned welding workpiece (18) to rotate axially, and cooperate with the main body (13) of the welding device to complete the welding. One of the helical spring sheets (14) is provided with an auxiliary insertion ring (17) at its end, and the other helical spring sheet (14) is provided with an auxiliary insertion groove (16) at its end. When the two sets of helical spring sheets (14) come into contact, the auxiliary insertion ring (17) and the auxiliary insertion groove (16) are inserted and positioned to assist the docking of the two sets of helical spring sheets (14). The spiral spring sheet (14) is provided with a friction layer on the outside. The friction layer matches the inner wall of the welded workpiece (18) and is used to increase the friction force when in contact with the inner wall of the welded workpiece (18).

2. The welding robot for processing automotive parts according to claim 1, characterized in that: The moving component includes a guide rail device (21) symmetrically arranged on the processing table (11), a guide rail slider (22) slidably fitted on the guide rail device (21), a slot (24) opened on the guide rail slider (22), and a moving plate (23) is provided on the two slots (24) at the same end; the guide rail device (21) is used to provide moving guidance for the guide rail slider (22), the guide rail slider (22) is used to drive the moving plate (23) to move, and the slot (24) is used to fix the moving plate (23).

3. The welding robot for processing automotive parts according to claim 2, characterized in that: The rotating assembly includes a motor (31) mounted on a movable plate (23), a rotating plate (32) is mounted on the output end of the motor (31), and a mounting ring (33) is fixedly mounted on the end of the rotating plate (32) away from the motor (31). The mounting ring (33) is connected to a helical spring plate (14). The motor (31) is used to drive the rotating plate (32) to rotate, and the rotating plate (32) is used to drive the mounting ring (33) and the helical spring plate (14) to rotate.

4. The welding robot for processing automotive parts according to claim 3, characterized in that: The rotating plate (32) is also provided with an electric push rod (41), and the output end of the electric push rod (41) is provided with a mounting plate (43); the end of the spiral spring sheet (14) away from the rotating plate (32) is provided with a fixing plate (42), and the mounting plate (43) and the fixing plate (42) are connected by a connecting component; the electric push rod (41) is used to drive the mounting plate (43) to move, and the connecting component is used to connect the mounting plate (43) and the fixing plate (42) to achieve the contraction and reset of the spiral spring sheet (14).

5. A welding robot for processing automotive parts according to claim 4, characterized in that: The connecting assembly includes a connecting ring (45) disposed at the end of the mounting plate (43), a connecting rope (44) disposed on the connecting ring (45), the connecting rope (44) extending into the interior of the helical spring sheet (14); a lifting lug (48) disposed inside the fixing plate (42), the connecting rope (44) being connected to the lifting lug (48); the connecting ring (45) is used to fix the connecting rope (44), the connecting rope (44) is used to transmit tension, and the lifting lug (48) is used to connect the connecting rope (44) to the fixing plate (42).

6. The welding robot for processing automotive parts according to claim 5, characterized in that: The spiral spring sheet (14) has support rods (46) arranged at equal intervals inside. The end of the support rod (46) is provided with a guide ring (47), which matches the connecting rope (44). The support rod (46) is used to support the guide ring (47), and the guide ring (47) is used to guide the movement of the connecting rope (44).

Images