Ring welding equipment and welding method thereof

Abstract

The present invention provides a ring welding device, including: a base, a slewing mechanism, a lifting mechanism, a clamping mechanism and a welding robot; the rotating component can drive the workpiece placed in the placement area to rotate along the axis of the first direction; the lifting mechanism includes at least two centering components, and each centering component is respectively configured on a walking slide; the clamping mechanism includes a clamping component and a tightening component, the clamping component can limit and clamp one end of the workpiece hoisted and placed in the placement area along the third direction, and when the driven component moves to the other end close to the workpiece, it drives the tightening component to limit and abut against the workpiece along the first direction; it is suitable for automatic clamping and welding of large and long tubular workpieces in engineering machinery, and provides a more automated and simplified welding system, which greatly reduces the labor intensity of operators, improves the working environment of workers, improves the operating safety of workers, and significantly reduces the production cost of enterprises. The present application also provides a welding method.

Description

Technical Field

[0001] The present invention relates to the technical field of welding equipment, and in particular to a ring welding device and a welding method thereof. Background Art

[0002] With the rapid development of the economy, hydraulic components such as hydraulic cylinders, which are widely used in engineering machinery and equipment, are becoming longer and longer, resulting in larger, heavier and more diverse parts. There is currently no dedicated equipment for welding long tube-shaped workpieces. Workers choose different tooling components according to different workpiece diameters and lengths. Workpieces may even be too long to be processed. This is inconvenient to operate, inefficient, and requires high labor intensity for operators, and poses certain safety hazards. Summary of the invention

[0003] The invention discloses a ring welding device and a welding method thereof, aiming to improve the problems that the existing ring welding device is difficult to weld a workpiece and has low efficiency.

[0004] The present invention adopts the following scheme:

[0005] The present application provides a ring welding device for clamping and welding long tubular workpieces, comprising: a base, a rotating mechanism, a lifting mechanism, a clamping mechanism and a welding robot; the base is extended and arranged along a first direction, and has a plurality of independently arranged walking slides, each of which can be adjusted in position by sliding along the arrangement direction of the base; the rotating mechanism comprises a rotating assembly and a driven assembly arranged at both ends of the base opposite to each other along a first direction; the rotating assembly is fixed at one end of the base, the driven assembly is arranged on one of the walking slides and can form a placement area for accommodating workpieces between the driven assembly and the rotating assembly, and the rotating assembly can drive the workpiece placed in the placement area to rotate along the axis of the first direction; the lifting mechanism is arranged in the placement area, The lifting mechanism includes at least two centering components, and each centering component is respectively configured on one of the walking slides; the centering component includes two supporting members that are synchronously centered and approached or moved away from each other along the second direction, and the supporting members are opposed to each other to form a lifting surface that lifts the workpiece and places it horizontally in the placement area along the first direction; the clamping mechanism includes a clamping component configured on one side of the rotating component and a tightening component configured on one side of the driven component, and the clamping component can limit and clamp one end of the workpiece hoisted and placed in the placement area along the third direction, and when the driven component moves to the other end close to the workpiece, it drives the tightening component to limit and abut against the workpiece along the first direction; the welding robot is movably configured on one side of the base and can perform welding operations on the workpiece in the welding area.

[0006] As a further improvement, the rotating assembly includes a first body arranged on a walking slide, a turntable rotatably arranged on one side of the first body, and a motor driving the turntable to rotate relative to the body; wherein the motor and the turntable are connected in a gear meshing manner, and the clamping assembly is arranged on the turntable.

[0007] As a further improvement, the driven assembly includes a second body arranged on another walking slide and an electric push rod rotatably arranged on one side of the second body; wherein, the clamping assembly is arranged on the output end of the push rod, and the clamping assembly and the clamping assembly are constructed to be approximately at the same horizontal height and are arranged opposite to each other.

[0008] As a further improvement, the first body and the turntable, as well as the second body and the electric push rod, are matched in the form of slewing bearings.

[0009] As a further improvement, the clamping assembly is a clamping chuck, and the rotating mechanism also includes a locking assembly arranged on the first body and capable of moving along a second direction to limit the rotation of the chuck; the locking assembly includes a sliding member arranged on one side of the first body and a limiting member arranged on the sliding member, and the limiting member can move in a direction approaching or away from the chuck under the drive of the sliding member, and when approaching the chuck, it elastically abuts against one side of the chuck in a plug-in fitting manner.

[0010] As a further improvement, the clamping assembly is constructed as a conical body that can be engaged and abutted against the end surface of the workpiece.

[0011] As a further improvement, the lifting surface located in the same centering component is constructed as a V-shaped structure that can adapt to the pipe diameter of the workpiece, and the supporting member allows the workpiece to rotate relative to the lifting surface through a rubber roller.

[0012] As a further improvement, the supporting member is generally in the form of a wedge-shaped seat, and rubber rollers of different sizes are respectively arranged at least on the top and bottom of the supporting surface, and the outer side of each rubber roller constitutes part of the supporting surface.

[0013] As a further improvement, the supporting members of the same centering component move synchronously closer or farther away in a sliding manner in the second direction, so that the opening of the V-shaped structure formed between the two supporting surfaces is adjustable; and the workpiece body placed on the supporting surface can at least abut against rubber rollers at the same level on different supporting members.

[0014] The present application further provides a welding method, which uses the above-mentioned girth welding equipment to clamp and weld a long tubular workpiece, and comprises the following steps:

[0015] Pre-adjusting the placement interval between the rotating component and the driven component of the rotary mechanism according to the size parameters of the workpiece;

[0016] The traveling slide is used to drive the centering component of the lifting mechanism to move along the first direction until it can match the length of the workpiece and support it, and the supporting member of the centering component moves along the second direction to adjust the opening of its lifting surface so that the supporting member can match the width of the workpiece;

[0017] The workpiece is hoisted along the third direction into the placement area and supported on the lifting mechanism, and the driven component is adjusted again so that the workpiece is driven by the traveling slide to press against the clamping component on the other side through the pressing component, so that the workpiece is limitedly clamped between the clamping component and the pressing component;

[0018] The rotating assembly is driven to drive the workpiece clamped in the placement area to rotate along the axis of the first direction, and a ring welding operation is performed on the welding station through the welding robot;

[0019] The ring welding operation at least includes in sequence: welding the workpiece by tungsten inert gas welding to form a covering weld; surfacing by cold spraying to form a transition layer weld; and welding the base layer by metallurgical electrode gas shielded welding or arc welding to form a base layer weld.

[0020] By adopting the above technical solution, the present invention can achieve the following technical effects:

[0021] The ring welding equipment of the present application is suitable for the automatic clamping and welding of large and long tube-type workpieces in engineering machinery. It provides a more automated and simplified welding system, greatly reduces the labor intensity of operators, improves the working environment of workers, improves the operating safety of workers, and significantly reduces the production cost of enterprises. Among them, the rotary mechanism and the lifting mechanism are flexibly configured on the base, and can be adjusted according to the size parameters of the workpiece, suitable for the clamping and placement of workpieces of various sizes, and the workpiece placed in the placement area is clamped and tightened by the clamping mechanism, and can be driven by the rotary mechanism to make the workpiece rotate along the axis direction of the first direction, and always supported and maintained on the supporting assembly, so that clamping and placement are more stable and efficient, which is conducive to the welding robot to perform ring welding operations on the workpiece in the welding area, and the welding effect is significant, which improves work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1is a schematic structural diagram of a ring welding device according to an embodiment of the present invention at a first viewing angle;

[0024] Figure 2 is a schematic structural diagram of a ring welding device according to an embodiment of the present invention at a second viewing angle;

[0025] Figure 3 is a schematic diagram of a portion of the structure of the ring welding equipment according to an embodiment of the present invention, wherein the portion is enlarged for the sake of illustration;

[0026] Figure 4 is a schematic diagram of another part of the structure of the ring welding equipment according to an embodiment of the present invention, wherein the part is enlarged for the sake of illustration;

[0027] Figure 5 It is a flowchart of the welding method according to an embodiment of the present invention.

[0028] Icons: 1-base; 11-travel slide; 2-slewing mechanism; 21-rotating assembly; 211-first body; 212-turntable; 213-motor; 22-driven assembly; 221-second body; 222-electric push rod; 23-locking assembly; 231-sliding part; 232-limiting part; 3-lifting mechanism; 31-centering assembly; 311-supporting part; 312-rubber roller; 4-clamping mechanism; 41-clamping assembly; 42-tightening assembly; 5-welding robot; A-workpiece; X-first direction; Y-second direction; Z-third direction. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the invention claimed for protection, but merely represents the selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0030] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0031] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0032] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0034] Example

[0035] Combination Figures 1 to 4The present embodiment provides a ring welding device for clamping and welding long tubular workpieces, comprising: a base 1, a rotary mechanism 2, a lifting mechanism 3, a clamping mechanism 4 and a welding robot 5. The base 1 is extended along a first direction X, and has a plurality of independently arranged walking slides 11, each of which can be adjusted in position by sliding along the layout direction of the base 1. The rotary mechanism 2 comprises a rotating assembly 21 and a driven assembly 22 arranged at both ends of the base 1 opposite to each other along the first direction X. The rotating assembly 21 is fixed at one end of the base 1, and the driven assembly 22 is arranged on a walking slide 11 and can form a placement area for accommodating the workpiece A between the rotating assembly 21, and the rotating assembly 21 can drive the workpiece A placed in the placement area to rotate along the axis of the first direction X. The lifting mechanism 3 is arranged in the placement area, and the lifting mechanism 3 comprises at least two centering assemblies 31, and each centering assembly 31 is respectively arranged on a walking slide 11. The centering assembly 31 includes two supporting members 311 that are synchronously centered and close to or away from each other along the second direction Y. The supporting members 311 are opposite to each other to form a lifting surface that lifts the workpiece A and places it horizontally in the placement area along the first direction X. The clamping mechanism 4 includes a clamping assembly 41 configured on one side of the rotating assembly 21 and a tightening assembly 42 configured on one side of the driven assembly 22. The clamping assembly 41 can limit and clamp one end of the workpiece A hoisted and placed in the placement area along the third direction Z. When the driven assembly 22 moves to the other end close to the workpiece A, it drives the tightening assembly 42 to limit and abut against the workpiece A along the first direction X. The welding robot 5 is movably configured on one side of the base 1 and can perform welding operations on the workpiece A in the welding area.

[0036] The ring welding equipment in this embodiment is suitable for the automatic clamping and welding of large long tube workpieces A in engineering machinery. It provides a more automated and simplified welding system, greatly reduces the labor intensity of operators, improves the working environment of workers, improves the operating safety of workers, and significantly reduces the production cost of enterprises. Among them, the slewing mechanism 2 and the lifting mechanism 3 are flexibly configured on the base 1, and can be adjusted according to the size parameters of the workpiece A, and are suitable for the clamping and placement of workpieces A of various sizes. In addition, the workpiece A placed in the placement area is clamped and tightened by the clamping mechanism 4, and can be driven by the slewing mechanism 2 to make the workpiece A rotate along the axis direction of the first direction X, and always supported and maintained on the supporting assembly, so that the clamping and placement are more stable and efficient, which is conducive to the welding robot 5 to perform ring welding operations on the workpiece A in the welding area, and the welding effect is significant, which improves the work efficiency.

[0037] It should be mentioned that, the first direction X, the second direction Y and the third direction Z are all arranged perpendicular to each other.

[0038] In one embodiment, the rotating assembly 21 includes a first body 211 disposed on a traveling slide 11, a turntable 212 rotatably disposed on one side of the first body 211, and a motor 213 driving the turntable 212 to rotate relative to the body. The motor 213 and the turntable 212 are connected in a gear meshing manner, and the clamping assembly 41 is disposed on the turntable 212. Correspondingly, the driven assembly 22 includes a second body 221 disposed on another traveling slide 11 and an electric push rod 222 rotatably disposed on one side of the second body 221. The tightening assembly 42 is disposed on the output end of the push rod, and the tightening assembly 42 and the clamping assembly 41 are constructed to be approximately at the same horizontal height and are arranged opposite to each other. It should be noted that the power source in the slewing mechanism 2 is constructed in a manner that the reducer cooperates with the motor 213 to drive the rotation. Specifically, the driving source directly transmits the power of the motor 213 to the turntable 212 through a gear meshing connection, and the driven component 22 can rotate together, thereby rotating as a whole along the axis of the first direction X. A precision reducer plus an external shaft motor 213 is used, and the output end of the motor 213 can be meshed and transmitted with the slewing bearing, making the rotation method more stable and efficient. In addition, the first body 211 and the turntable 212, as well as the second body 221 and the electric push rod 222 are matched in the form of a slewing bearing. Among them, the slewing bearing is composed of inner and outer rings, rolling elements, etc. The slewing bearing is a large bearing that can withstand a comprehensive load and can simultaneously withstand large axial, radial loads and overturning moments, thereby facilitating an efficient rotation configuration.

[0039] See also Figure 2 , Figure 3 and Figure 4In one embodiment, the clamping assembly 41 is a clamping chuck. The rotary mechanism 2 also includes a locking assembly 23 disposed on the first body 211 and capable of moving along the second direction Y to limit the rotation of the chuck. The locking assembly 23 includes a sliding member 231 disposed on one side of the first body 211 and a limiting member 232 disposed on the sliding member 231. The limiting member 232 can move in a direction close to or away from the chuck under the drive of the sliding member 231, and when close to the chuck, it elastically abuts against one side of the chuck in a plug-in manner. Specifically, the sliding member 231 is driven by an external cylinder (not shown) to reciprocate along the second direction Y, and can make the limiting member 232 disposed on the sliding member 231 approach or move away from the chuck along the pushing direction of the cylinder. When the turntable 212 drives the workpiece A to rotate to a preset position through the chuck, the stopper 232 moves from a position away from the chuck to abut against one side of the chuck, so as to play a foolproof protection role when the workpiece A does not need to rotate, and ensure the stability of the ring-welded workpiece A. In particular, the stopper 232 is constructed in the shape of a rod body with an elastic pad, and a corresponding engaging groove (not shown) is provided on one side of the chuck, so that the end of the rod body can be inserted into the engaging groove, and the elastic force of the elastic pad is abutted so that the stopper 232 and the chuck always maintain an elastic tight fit, thereby avoiding damage to the chuck or the stopper 232.

[0040] In one embodiment, preferably, the clamping assembly 42 is configured as a cone that can be engaged with the end surface of the workpiece A. The cone facilitates the workpiece A in the placement area to be tightly fitted, so that the workpiece A is tightened by the cone and the end surface of the workpiece A under the drive of the travel slide 11, and is further clamped in the placement area under the limit clamping of the clamping assembly 41 on the other side.

[0041] See also Figure 2 and Figure 4 , the lifting mechanism 3 is further described below. Among them, the lifting surface located in the same centering component 31 is constructed as a V-shaped structure that can adapt to the diameter of the workpiece A, and the supporting member 311 allows the workpiece A to rotate relative to the lifting surface through the rubber roller 312. Specifically, the supporting member 311 is roughly a wedge-shaped seat, and rubber rollers 312 of different sizes are respectively arranged at least at the top and bottom of the supporting surface, and the outer side of each rubber roller 312 constitutes part of the supporting surface. Therefore, the supporting surface is formed on the side where the two wedge-shaped seats are directly opposite to each other, so that the rubber roller 312 cooperates with the supporting surface to lift the main body of the workpiece A, and can allow the workpiece A to cooperate with the rubber roller 312 on the supporting surface in a rolling manner, thereby reducing the friction resistance during rotation, which is beneficial to the lifting operation of the workpiece A during the rotation process.

[0042] Among them, in one embodiment, the supporting members 311 of the same centering component 31 are synchronously approached or moved away in a sliding manner in the second direction Y, so that the opening of the V-shaped structure formed between the two supporting surfaces is adjustable. In addition, the body of the workpiece A placed on the supporting surface can at least abut against the rubber rollers 312 at the same horizontal height on different supporting members 311. It should be noted that the two supporting members 311 of the centering component 31 can be configured on the respective nut seats of the bidirectional screw, and the screw is driven to rotate by external force so that the two nut seats are synchronously approached or moved away, so that the distance between the two supporting members 311 is adjusted, so that the opening of the lifting surface is correspondingly increased or decreased to adapt to the diameter size of the workpiece A along the width direction. In addition, the diameter of the workpiece A satisfies the distance between the two rubber rollers 312 of the same height at the bottom, so that the workpiece A placed on the supporting surface can at least be supported between the rubber rollers 312 of the same height, ensuring the rollable configuration of the workpiece A on the supporting surface.

[0043] Among them, it should be mentioned that the position adjustment of multiple walking slides 11 on the base 1 can be slidingly configured on the guide rails on the base 1, and the walking slides 11 are driven to move back and forth in a gear rack manner through the power source on each slide. Among them, the walking slide 11 where the centering component 31 is located is located between the rotating component 21 and the driven component 22. Each walking slide 11 can share the same guide rail to achieve walking on the base 1. In particular, the mobile configuration of the welding robot 5 on one side of the base 1 can be that the welding robot 5 has its own walking base 1, and it is arranged side by side with the guide rails on the base 1 on different paths, so that the welding robot 5 can move flexibly and without interference, which is convenient for welding workpiece A in the welding area. In addition, the workpiece A can be a repair welding process implemented in the ring welding equipment of the present application, or a ring welding after the welded part and the workpiece are butt-jointed, which is not limited here.

[0044] Combination Figure 2 and Figure 5 This embodiment further provides a welding method, which uses the above-mentioned ring welding equipment to clamp and weld the long tube workpiece A, and includes the following steps:

[0045] S1: According to the size parameters of the workpiece A, pre-adjust the placement interval between the rotating component 21 and the driven component 22 of the rotary mechanism 2.

[0046] S2: Use the traveling slide 11 to drive the centering component 31 of the lifting mechanism 3 to move along the first direction X until it can match the length dimension of the workpiece A for support, and move the supporting member 311 of the centering component 31 along the second direction Y to adjust the opening of its lifting surface, so that the supporting member 311 can adapt to the width dimension of the workpiece A.

[0047] S3: Lift the workpiece A along the third direction Z into the placement area and support it on the lifting mechanism 3, and adjust the driven component 22 again so that it is driven by the walking slide 11 and drives the workpiece A to press against the clamping component 41 on the other side through the clamping component 42, so as to limit the workpiece A between the clamping component 41 and the clamping component 42.

[0048] S4: driving the rotating assembly 21 to drive the workpiece A clamped in the placement area to rotate along the axis of the first direction X, and performing a circumferential welding operation on the welding station through the welding robot 5.

[0049] The ring welding operation at least includes: welding the workpiece A by tungsten inert gas arc welding to form a cladding weld. Using cold spraying process to build up a transition layer weld. Using metallurgical inert gas shielded welding or arc welding to weld the base layer to form a base layer weld.

[0050] In one embodiment, in particular, the thickness of the cladding weld is 1-2 mm, the thickness of the transition layer weld is 2-4 mm, and the thickness of the base layer weld is 4-8 mm. This ring welding method can effectively solve the large amount of mixing and diffusion of cladding alloy elements produced by traditional welding, play a good isolation effect, achieve high-quality and efficient welding, low welding cost, and easy to realize automated production.

[0051] It should be mentioned that in the preparation process of clamping and welding, the placement area is adjusted so that the placement area can be adapted to accommodate the lifting and placement of workpiece A, and the placement area is greater than the length of workpiece A. Then, by adjusting the position of the lifting mechanism 3, the workpiece A of different lengths can be lifted at intervals to achieve stable force. After the lifting, the workpiece A in the lifting state cannot guarantee that its end can be directly clamped by the clamping assembly 41 on the rotating assembly 21. It is necessary to use the clamping assembly 42 on the driven assembly 22 slidably configured at the other end of the workpiece A to abut against the workpiece A along the first direction X and drive the workpiece A to move along the placement area until its end can be clamped and clamped on the clamping assembly 41. At this time, both ends of the workpiece A are in a limited fixed state, so that the workpiece A is stably clamped between the rotating mechanism 2, and rotates and adjusts its position under the drive of the rotating assembly 21 to facilitate the ring welding operation.

[0052] The above are only preferred implementations of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention.

Claims

1. A ring welding device for clamping and welding long tubular workpieces, characterized in that: include: The base is extended along the first direction and has a plurality of independently arranged walking slides, each of which can be adjusted in position by sliding along the arrangement direction of the base; The rotary mechanism comprises a rotating assembly and a driven assembly which are arranged at two ends of the base in a first direction and are opposite to each other; the rotating assembly is fixed at one end of the base, the driven assembly is arranged on one of the travel slides and can form a placement area for accommodating workpieces between the driven assembly and the rotating assembly, and the rotating assembly can drive the workpiece placed in the placement area to rotate along the axis of the first direction; A lifting mechanism is arranged in the placement area, the lifting mechanism comprises at least two centering components, and each centering component is respectively arranged on one of the walking slides; the centering component comprises two supporting members that are synchronously centered and approach or move away from each other along the second direction, and the supporting members are opposite to each other to form a lifting surface for lifting the workpiece and placing it horizontally in the placement area along the first direction; The clamping mechanism includes a clamping assembly configured on one side of the rotating assembly and a pressing assembly configured on one side of the driven assembly, wherein the clamping assembly can limit and clamp one end of a workpiece hoisted and placed in the placement area along the third direction, and when the driven assembly moves to the other end close to the workpiece, the pressing assembly is driven to limit and abut against the workpiece along the first direction; A welding robot is movably arranged on one side of the base and is capable of performing welding operations on the workpiece in the welding area; The rotating assembly includes a first body arranged on a walking slide, a turntable rotatably arranged on one side of the first body, and a motor driving the turntable to rotate relative to the body; The driven assembly includes a second body disposed on a traveling slide and an electric push rod rotatably disposed on one side of the second body; wherein the pressing assembly is disposed on the output end of the push rod; The rotary mechanism further comprises a locking assembly disposed on the first body and movable in the second direction to limit the rotation of the chuck; the locking assembly comprises a sliding member disposed on one side of the first body and a limiting member disposed on the sliding member, the limiting member being able to move in a direction approaching or away from the chuck driven by the sliding member, and being elastically abutted against one side of the chuck in a plug-in matching manner when approaching the chuck; The limiter is constructed in the shape of a rod with an elastic pad sleeved thereon, and a snap-fitting groove is correspondingly provided on one side of the chuck, and the end of the rod can be inserted into the snap-fitting groove, and the elastic force of the elastic pad abuts against the limiter so that the limiter and the chuck always maintain a tight elastic fit; The lifting surface located in the same centering component is constructed as a V-shaped structure that can adapt to the diameter of the workpiece, and the support member is passed through a rubber roller to enable the workpiece to rotate relative to the lifting surface; The supporting member is generally in the form of a wedge-shaped seat, and rubber rollers of different sizes are respectively arranged at least at the top and bottom of the supporting surface, and the outer side of each rubber roller constitutes part of the supporting surface; The supporting members of the same centering assembly are synchronously moved closer or farther away in a sliding manner in the second direction, so that the opening of the V-shaped structure formed between the two supporting surfaces is adjustable; The ring welding device is suitable for implementing a welding method to clamp and weld a long tubular workpiece; the welding method comprises the following steps: Pre-adjusting the placement interval between the rotating component and the driven component of the rotary mechanism according to the size parameters of the workpiece; The traveling slide is used to drive the centering component of the lifting mechanism to move along the first direction until it can match the length of the workpiece and support it, and the supporting member of the centering component moves along the second direction to adjust the opening of its lifting surface so that the supporting member can match the width of the workpiece; The workpiece is hoisted along the third direction into the placement area and supported on the lifting mechanism, and the driven component is adjusted again so that the workpiece is driven by the traveling slide to press against the clamping component on the other side through the pressing component, so that the workpiece is limitedly clamped between the clamping component and the pressing component; The rotating assembly is driven to drive the workpiece clamped in the placement area to rotate along the axis of the first direction, and the circumferential welding operation is performed on the welding station through the welding robot; wherein the circumferential welding operation at least sequentially includes: welding the workpiece by tungsten inert gas welding to form a cladding weld; surfacing welding by cold spraying to form a transition layer weld; welding the base layer by metal arc welding or arc welding to form a base layer weld; When the turntable drives the workpiece to rotate to a preset position through the chuck, the limiter moves from a position away from the chuck to abut against one side of the chuck to perform foolproof protection when the workpiece does not need to rotate.

2. The ring welding equipment according to claim 1, characterized in that: The motor and the turntable are connected in a transmission manner by gear meshing, and the clamping assembly is arranged on the turntable.

3. The ring welding device according to claim 2, characterized in that: The tightening assembly and the clamping assembly are constructed to be substantially at the same level and to be arranged opposite to each other.

4. The ring welding device according to claim 3, characterized in that: The first body and the turntable, as well as the second body and the electric push rod, are matched in the form of slewing bearings.

5. The ring welding equipment according to claim 2, characterized in that: The clamping assembly is a clamping chuck.

6. The ring welding device according to claim 3, characterized in that: The pressing assembly is constructed as a conical body capable of engaging and abutting against the end surface of the workpiece.

7. The ring welding device according to claim 1, characterized in that: The workpiece body placed on the supporting surface can at least abut against rubber rollers on different supporting members that are at the same level.

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