Welding machine and welding method

Abstract

This invention provides a welding machine and a welding method. The welding machine includes a receiving base, a welding assembly, and two sets of clamping assemblies. The welding assembly is disposed on the top of the receiving base and is suitable for welding the butt joint of two workpieces. Both sets of clamping assemblies are mounted on the receiving base and are respectively located on both sides of the welding assembly. Each set of clamping assemblies can clamp the workpiece on the corresponding side, so that the two workpieces are coaxially butt-jointed. Each clamping assembly includes at least one pair of clamping parts, and each pair of clamping parts can move radially towards or away from the workpiece. This welding machine has a simple structure, uses a quick and convenient welding method, and can achieve complex butt joint circumferential welding of tubular workpieces. The welding process is efficient and fast, with precise and stable clamping and a high degree of automation. During circumferential welding, it avoids multiple repetitive pipe butt joint processes, making the welding process more precise and simplified, and greatly improving production efficiency.

Description

Technical Field

[0001] This invention relates to the field of welding, and provides a welding machine and a welding method. Background Technology

[0002] The concept of welding machines originated from the need to improve traditional manual welding. In early industrial production, welding operations mainly relied on manual labor by workers. This method was not only inefficient, but also highly susceptible to human error, making it difficult to guarantee consistent welding quality. As industrialization accelerated, the demands for production efficiency and quality stability increased, leading to the development of welding machines.

[0003] Existing welding machines are categorized based on the type of workpiece, such as pipe welding machines, box welding machines, and plate welding machines. Among them, common pipe welding machines can weld workpieces with butt welds between pipes.

[0004] However, in the welding of pipe fittings in some large equipment fields, such as high-speed trains and urban rail vehicles, various tubular welded structures often face significant difficulties in both assembly and welding. In particular, for butt welds of tubular workpieces, due to the difficulty of all-position welding, existing pipe welding machines struggle to reliably clamp and fix the workpieces during butt circumferential welding, easily leading to misalignment of the two sets of workpieces and affecting welding quality; moreover, it is difficult to efficiently and accurately adjust the position of the workpieces according to the welding process.

[0005] It is evident that existing welding machines still face the technical challenge of reliably clamping and accurately positioning the workpiece during the difficult process of circumferential welding of tubular workpieces. This results in problems such as high difficulty in circumferential welding, unstable weld quality, low welding efficiency, and excessively high manufacturing costs. Summary of the Invention

[0006] This invention provides a welding machine and welding method, which solves the technical problem of how to reliably clamp and fix the workpiece and accurately position it during the difficult circumferential welding process of tubular workpieces.

[0007] The present invention provides a welding machine, comprising: a receiving base; a welding assembly disposed on the top of the receiving base, the welding assembly being adapted to weld the joint of two workpieces to be welded; two sets of clamping assemblies, both mounted on the receiving base, the two sets of clamping assemblies being respectively disposed on both sides of the welding assembly, each set of clamping assemblies being able to clamp the workpiece to be welded on the corresponding side, so that the two workpieces to be welded are coaxially joined; wherein, the clamping assembly includes at least one pair of clamping parts, each pair of clamping parts being able to move in opposite directions or towards each other along the radial direction of the workpieces to be welded.

[0008] According to the welding machine provided by the present invention, the receiving seat includes a mounting cavity and a partition plate, the partition plate being placed flat on the top of the mounting cavity and divided into two welding zones, the welding assembly being disposed at the connection between the two welding zones; two sets of clamping assemblies are symmetrically disposed within the two welding zones; the welding machine further includes: two sets of driving assemblies, respectively installed in the mounting cavity and respectively located below the two welding zones; the two sets of driving assemblies are respectively connected to the two sets of clamping assemblies, each set of driving assemblies being used to drive the synchronous movement of each pair of clamping parts on the corresponding side.

[0009] According to the welding machine provided by the present invention, each pair of clamping parts includes a pair of clamping plates and a plurality of auxiliary rollers. The pair of clamping plates are respectively clamped on the left and right sides of the workpiece to be welded in a radial direction. Each clamping plate is connected to a plurality of auxiliary rollers on the surface of the workpiece to be welded. The pair of clamping plates can be pressed and attached to the outer surface of the workpiece to be welded by each of the auxiliary rollers.

[0010] According to the welding machine provided by the present invention, the clamping plate is constructed in an arc shape, and the auxiliary rollers are arranged at intervals along the surface of the arc-shaped clamping plate.

[0011] According to the welding machine provided by the present invention, the welding machine further includes a pair of support mechanisms, the bottoms of the pair of support mechanisms are respectively connected to the left and right sides of the drive assembly, and the tops of the pair of support mechanisms are respectively connected to each pair of clamping parts; two sliding grooves are respectively provided in the two welding zones of the partition, and the two sliding grooves are respectively arranged radially along the workpiece to be welded; the pair of support mechanisms are inserted into the sliding grooves on the corresponding sides, and the drive assembly can synchronously drive the pair of support mechanisms to move in opposite directions or in reverse along the sliding grooves.

[0012] According to the welding machine provided by the present invention, the support mechanism includes a drive frame, a docking plate, and a drive plate. The drive frame is disposed in the mounting cavity, the bottom of the drive frame is connected to the corresponding side of the drive assembly, the top of the drive frame is connected to the drive plate through the docking plate, the docking plate is movably inserted into the slide groove on the corresponding side, and the drive plate is connected to the clamping part on the corresponding side.

[0013] According to the welding machine provided by the present invention, the drive frame includes a base plate, a top plate and a vertical plate. The base plate is movably disposed at the bottom of the mounting cavity and is connected to the corresponding side of the drive assembly. The top plate is disposed below the partition and is connected to the mating plate on the corresponding side. The vertical plate is vertically connected to the top plate and the base plate.

[0014] According to the welding machine provided by the present invention, the driving assembly includes: a driving gear disposed between a pair of the supporting mechanisms, the driving gear being connected to a driving motor; a pair of driving tooth plates connected by the driving gear, the ends of each driving tooth plate away from the driving gear being respectively connected to the corresponding supporting mechanism, the driving gear being able to drive the pair of driving tooth plates to move relative to each other by rotation, so as to drive the pair of supporting mechanisms to move synchronously in opposite directions or in opposite directions.

[0015] The welding machine provided by the present invention further includes: a guide rail, which is arranged in an arched structure along the radial direction of the workpieces to be welded, the middle part of the guide rail being located above the joint of the two workpieces to be welded, and the two ends of the guide rail being respectively connected to the receiving seat; a traveling assembly, which is movably mounted on the guide rail, the traveling assembly being connected to the welding assembly, and the traveling assembly being adapted to drive the welding assembly to move along the guide rail so that the welding assembly can surround and weld the joint.

[0016] According to the welding machine provided by the present invention, the guide rail includes a first annular plate, a second annular plate, and a traveling toothed plate. The first annular plate and the second annular plate are respectively arranged in an arched structure along the radial direction of the workpiece to be welded. The first annular plate is disposed below the second annular plate, and an annular moving space is left between the first annular plate and the second annular plate. The traveling toothed plate is connected to the surface of the second annular plate facing the first annular plate. The traveling assembly includes a traveling gear, which is meshed with the traveling toothed plate and can move along the annular moving space.

[0017] According to the welding machine provided by the present invention, the walking assembly further includes a walking frame and a walking motor, the walking drive shaft of the walking gear is transversely placed on the top of the walking frame, one end of the walking drive shaft is connected to the walking motor; the bottom of the walking frame is connected to the welding assembly.

[0018] According to the welding machine provided by the present invention, the traveling frame includes a hanging plate, a mounting plate, a limiting plate, a connecting column, and an assembly plate. The hanging plate is disposed below the guide rail. The mounting plate and the limiting plate are both connected to the upper part of the hanging plate and are respectively arranged side by side on the front and rear sides of the guide rail. One end of the traveling drive shaft is connected to the limiting plate, and the other end of the traveling drive shaft passes through the mounting plate and is connected to the traveling motor. One end of the connecting column is connected to the bottom of the hanging plate, and the other end of the connecting column is connected to the welding assembly through the assembly plate.

[0019] The present invention provides a welding method, which is performed using the welding machine described above; the welding method includes the following steps.

[0020] Step 1, the material loading and clamping process, includes the following:

[0021] Place the two workpieces to be welded in the two sets of clamping assemblies respectively, and align the opposite ends of the two workpieces to be welded.

[0022] Each pair of clamping parts in each set of clamping assemblies is driven to move in opposite directions along the radial direction of the workpiece to be welded, so that each pair of clamping parts can clamp and fix the outer edge of the workpiece to be welded on the corresponding side.

[0023] Step 2, Welding Steps, includes the following:

[0024] The drive welding assembly welds the joint between the two parts to be welded.

[0025] After the weld seam at the joint facing upwards is completed, the two parts to be welded are driven to rotate synchronously in the corresponding clamping assemblies so that the weld seam is rotated to the downward-facing position.

[0026] The welding assembly is driven to weld the remaining portion of the joint between the two workpieces to be welded, thereby completing the circumferential welding of the joint.

[0027] The welding machine provided by this invention includes a receiving base, a welding assembly, and two sets of clamping assemblies. The welding assembly is disposed on top of the receiving base and is suitable for welding the joint of two workpieces to be welded, achieving automatic welding of the joint. This automatic welding process includes circumferential welding. Both sets of clamping assemblies are mounted on the receiving base, respectively located on both sides of the welding assembly. Each set of clamping assemblies can clamp the workpiece to be welded on the corresponding side, so that the two workpieces are coaxially joined. Each clamping assembly includes at least one pair of clamping parts, and each pair of clamping parts can move radially towards or in opposite directions along the workpiece. This welding machine has a simple structure, is suitable for quick and convenient welding methods, and can achieve complex circumferential welding of tubular workpieces. The welding process is efficient and fast, with precise and stable clamping and a high degree of automation. During circumferential welding, it avoids multiple repetitive pipe joining processes, making the welding process more precise and simplified, and greatly improving production efficiency.

[0028] The welding method provided by this invention is performed using the aforementioned welding machine. The welding method includes a loading and clamping step and a welding step. The loading step enables alignment of the opposite ends of two workpieces to be welded, as well as clamping, fixing, and flexibly adjusting the position of the workpieces. The welding step enables efficient and accurate circumferential welding at the joint of the workpieces. Furthermore, by performing this welding method using the aforementioned welding machine, this welding method possesses all the advantages of the aforementioned welding machine, which will not be elaborated further here. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in this 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 some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0030] Figure 1 This is a top view of the welding machine provided by the present invention.

[0031] Figure 2 This is a front sectional view of the welding machine provided by the present invention.

[0032] Figure 3 This is a top view of the internal structure of the receiving seat provided by the present invention.

[0033] Figure 4 This is a schematic diagram of the clamping assembly provided by the present invention.

[0034] Figure 5 This is a front sectional view of the driving component provided by the present invention.

[0035] Figure 6 This is a top sectional view of the driving component provided by the present invention.

[0036] Figure 7 This is a schematic diagram of the connection structure between the walking component and the track provided by the present invention.

[0037] Figure 8 This is a schematic diagram of the track structure provided by the present invention.

[0038] Figure 9 This is the front view of the walking component provided by the present invention.

[0039] Figure 10 This is a top view of the walking component provided by the present invention.

[0040] Figure label:

[0041] 1. Receiving seat; 2. Welding assembly; 3. Clamping assembly; 4. Drive assembly; 5. Guide rail; 6. Traveling assembly; 7. Clamping plate; 8. Auxiliary roller; 9. Drive plate; 10. Drive frame; 11. Drive motor; 12. Drive gear; 13. Drive toothed plate; 14. Butt plate; 15. Top plate; 16. Bottom plate; 17. Vertical plate; 18. Vertical plate; 19. First annular plate; 20. Second annular plate; 21. Inter-annular moving space; 22. Traveling toothed plate; 23. Hanging plate; 24. Mounting plate; 25. Traveling motor; 26. Traveling gear; 27. Connecting column; 28. Assembly plate; 29. ​​Limiting plate; 30. Slide groove. Detailed Implementation

[0042] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of the invention.

[0043] This invention provides a welding machine and proposes a welding method using the welding machine. The following is in conjunction with… Figures 1 to 10 The welding machine and welding method of the present invention are described.

[0044] like Figure 1 and Figure 2 As shown, the welding machine of this embodiment includes a receiving base 1, a welding assembly 2, and two sets of clamping assemblies 3. The welding assembly 2 is disposed on the top of the receiving base 1. Preferably, the welding assembly 2 is located in the middle of the top surface of the receiving base 1. The welding assembly 2 is suitable for welding the joint of two workpieces to be welded, realizing automatic welding of the joint of the workpieces to be welded. Both sets of clamping assemblies 3 are mounted on the receiving base 1, and the two sets of clamping assemblies 3 are respectively disposed on both sides of the welding assembly 2. Each set of clamping assemblies 3 can clamp the workpiece to be welded on the corresponding side, so that the two workpieces to be welded are coaxially joined. Preferably, the two sets of clamping assemblies 3 are symmetrically arranged with respect to the welding assembly 2, so that the ends of the two workpieces to be welded, which are respectively fixed to the two sets of clamping assemblies 3, can be accurately joined and coaxially connected, which facilitates welding and improves welding accuracy and welding quality.

[0045] It should be noted that the welding steps performed by the welding assembly 2 include at least one of circumferential welding and spot welding. This embodiment will describe in detail the welding steps performed by the welding assembly 2 using continuous circumferential welding as an example.

[0046] In some embodiments, such as Figure 2 As shown, the clamping assembly 3 includes at least one pair of clamping parts. Each pair of clamping parts can move in opposite directions or towards each other along the radial direction of the workpiece to be welded. On the one hand, the clamping assembly 3 uses the opposite movement of the two clamping parts in each pair to press and fix the workpiece to be welded radially, preventing it from loosening during welding. On the other hand, the clamping assembly 3 uses the opposite movement of the two clamping parts to reduce the pressure on the workpiece when it needs to be rotated to adjust its welding position during the welding process. It also controls the workpiece to rotate around its own axis so that the welding assembly 2 can weld the remaining unfinished parts of the joint. This adjustment process does not require reloading, simplifying the welding process.

[0047] It should be noted that the opposite motion described in the embodiments of the present invention is the process of two things moving closer to each other; similarly, the opposite motion is the process of two things moving away from each other.

[0048] It is evident that this welding machine has a simple structure, uses quick and convenient welding methods, and can achieve high-difficulty butt welding of tubular parts. The welding process is efficient and fast, with precise and stable clamping and a high degree of automation. In the circumferential welding process, it can avoid repeated pipe butt welding procedures, making the welding process more precise and efficient, and greatly improving production efficiency.

[0049] In some embodiments, such as Figure 2 As shown, the receiving seat 1 includes a mounting cavity and a partition. The partition serves as a welding platform and can be placed flat on top of the mounting cavity. Figure 1 As shown, the partition is divided into two welding zones by the position of welding component 2. Welding component 2 is located at the junction of the two welding zones. Figure 1 The upper and lower sides of the welding assembly 2 shown are actually two welding areas located on the front and rear sides of the welding assembly 2. Figure 1 The dotted lines shown indicate the loading positions and the joint positions of the two workpieces to be welded. It can be seen that the two sets of clamping components 3 are symmetrically arranged in the two welding areas, ensuring that the joint of the two workpieces to be welded is located below the welding component 2, and that the end faces of the two workpieces can be accurately aligned. This avoids redundant operations caused by repeatedly adjusting the joint position, reduces welding errors, and improves welding quality.

[0050] In some embodiments, such as Figure 2 As shown, the welding machine also includes two sets of drive assemblies 4. The two sets of drive assemblies 4 are respectively installed in the mounting cavity. Furthermore, the two sets of drive assemblies 4 are located below the two welding zones. The two sets of drive assemblies 4 are respectively connected to two sets of clamping assemblies 3. Each set of drive assemblies 4 is used to drive the synchronous movement of each pair of clamping parts on the corresponding side (i.e., the front or rear side of the welding assembly 2), that is, each set of drive assemblies 4 can drive the synchronous movement of each pair of clamping parts involved in the clamping assembly 3 on the same side, thereby achieving the clamping and fixing or loosening of the workpiece to be welded.

[0051] In some specific embodiments, such as Figure 2 and Figure 4 As shown, each pair of clamping parts includes a pair of clamping plates 7 and several auxiliary rollers 8. The pair of clamping plates 7 are respectively clamped radially to the left and right sides of the workpiece to be welded, to ensure that the pair of clamping plates 7 can maximize the clamping force on the workpiece to be welded, and to avoid the workpiece shaking during the welding process from affecting the welding quality. Several auxiliary rollers 8 are connected to the surface of each clamping plate 7 facing the workpiece to be welded, and the pair of clamping plates 7 can be pressed and attached to the outer surface of the workpiece to be welded by each auxiliary roller 8.

[0052] In some specific embodiments, when a pair of clamping plates 7 move radially towards each other along the workpiece to be welded and press against the surface of the workpiece with sufficient clamping force, the clamping force is large enough to keep the clamping plates 7 relatively stationary with respect to the outer surface of the workpiece. When it is necessary to rotate the workpiece, the pair of clamping plates 7 are driven to move in the opposite direction, which reduces the clamping force and allows the workpiece to be welded to rotate relative to the clamping plates 7, thereby changing the circumferential position of the workpiece and achieving circumferential welding.

[0053] It should be noted that the auxiliary rollers 8 installed inside the clamping plate 7 can guide the workpiece during rotation and prevent scratches between the workpiece and the clamping plate 7, thus protecting the outer surface of the workpiece. Preferably, the rotation axis of each auxiliary roller 8 is parallel to the axial direction of the workpiece to prevent axial movement of the workpiece during welding and rotation.

[0054] It should be noted that, as Figure 4 As shown, the clamping plate 7 is preferably constructed in an arc shape to better conform to the outer contour of the tubular workpiece to be welded, ensuring a more uniform clamping force on the outer surface of the workpiece under clamping conditions and preventing radial movement of the workpiece. Preferably, the auxiliary rollers 8 are arranged at intervals along the surface of the arc-shaped clamping plate 7, thereby ensuring that the force on each auxiliary roller 8 is uniform, and the guiding force applied to the rotating workpiece is also more uniform, making it easier and less labor-intensive to drive the workpiece to rotate.

[0055] In some embodiments, such as Figure 2 As shown, the welding machine also includes a pair of support mechanisms. The bottoms of the pair of support mechanisms are respectively connected to the left and right sides of the drive assembly 4, and the tops of the pair of support mechanisms are respectively connected to each pair of clamping parts. The drive assembly 4 and the clamping assembly 3 above and below the partition are connected by the pair of support mechanisms to achieve reliable transmission of driving force.

[0056] In some embodiments, two grooves 30 are provided in the two welding zones of the partition. The two grooves 30 are respectively arranged radially along the workpiece to be welded. A pair of support mechanisms are inserted into the grooves 30 on the corresponding sides (i.e., the front or rear side of the welding assembly 2). The drive assembly 4 can synchronously drive the pair of support mechanisms to move in opposite directions or in the opposite direction along the grooves 30. The grooves 30 can provide motion guidance and limitation for the support mechanisms, so that the support mechanisms can move along the grooves 30 under the drive of the drive assembly 4, thereby enabling the pair of support mechanisms to drive the pair of clamping parts to move in opposite directions or in the opposite direction along the radial direction of the workpiece to be welded, realizing clamping or releasing.

[0057] In some specific embodiments, such as Figure 2As shown, the support mechanism includes a drive frame 10, a docking plate 14, and a drive plate 9. The drive frame 10 is disposed within the mounting cavity, forming a support structure located below the partition and connected to the drive assembly 4. The bottom of the drive frame 10 is connected to the corresponding side of the drive assembly 4 (i.e., the left or right side of the drive assembly 4), for example... Figure 2 The drive assembly 4 shown has drive frames 10 connected to its left and right sides respectively. The top of the drive frame 10 is connected to the drive plate 9 via a mating plate 14. The drive plate 9 is connected to the clamping part on the corresponding side (i.e., the left or right side of the workpiece to be welded). This structure allows the support mechanism to be reliably connected to the clamping assembly 3 and the drive assembly 4, forming a stable and accurate power transmission.

[0058] To ensure that a pair of support parts can be symmetrically clamped on the left and right sides of the workpiece to be welded, forming a reliable clamping and fixing of the center position of the workpiece to be welded, it is preferable that the mating plate 14 is vertically connected to the top of the drive frame 10, and the drive plate 9 is horizontally connected to the top of the mating plate 14 and the position of the clamping plate 7 facing away from the workpiece to be welded, thereby ensuring that the clamping force is applied horizontally to the left or right side of the workpiece to be welded.

[0059] In some specific embodiments, the docking plate 14 is movably inserted into the groove 30 on the corresponding side (i.e., the front or rear side of the welding assembly 2) and is limited in movement with the groove 30. That is, the driving assembly 4 drives the docking plate 14 of the support mechanism to move along the groove 30.

[0060] In some specific embodiments, such as Figure 2 and Figure 3 As shown, the drive frame 10 includes a base plate 16, a top plate 15, and a vertical plate 17. The base plate 16 is movably disposed at the bottom of the mounting cavity and is connected to the corresponding side of the drive assembly 4 (i.e., the left or right side of the drive assembly 4). The top plate 15 is disposed below the partition. The top plate 15 is connected to the mating plate 14 on the corresponding side (i.e., the left or right side of the drive assembly 4). The vertical plate 17 is vertically connected to the top plate 15 and the base plate 16. This structural design of the drive frame 10 ensures a stable connection between the drive assembly 4 and the support assembly, improving structural strength.

[0061] It should be noted that the upper surface of the top plate 15 of the drive frame 10 slides in contact with the bottom of the partition, and the lower surface of the bottom plate 16 slides in contact with the bottom of the mounting cavity, thereby enabling the pair of drive frames 10 to slide within the mounting cavity under the action of the drive assembly 4, causing the support parts on the left and right sides to move closer or further apart.

[0062] In some specific embodiments, such as Figure 3As shown, to increase the clamping force and clamping stability of the workpiece to be welded, it is preferable that both the bottom plate 16 and the top plate 15 are straight plates with a certain length along the length direction of the workpiece to be welded. That is, if the clamping assembly 3 in the welding area is provided with two or more pairs of clamping parts, each pair of clamping parts is arranged sequentially along the axial direction of the workpiece to be welded, so as to achieve reliable clamping and fixing of multiple points along the length direction of the workpiece to be welded. It should be noted that the clamping plates 7 on the same side of the workpiece to be welded (i.e., the left or right side of the workpiece to be welded) of each pair of clamping parts can be connected to each other or not connected. On this basis, in order to improve the reliability of power transmission, it is preferable that the clamping plates 7 on the same side of the workpiece to be welded (i.e., the left or right side of the workpiece to be welded) are connected one by one to multiple mating plates 14, and multiple parallel sliding grooves 30 are opened on the partition of the receiving seat 1, each sliding groove 30 corresponding to each mating plate 14, so that a pair of mating plates 14 are inserted in each sliding groove 30. Each docking plate 14 is connected to the top plate 15 of the same drive frame 10 so that the drive assembly 4 can synchronously drive all pairs of support parts to move in opposite directions or in the opposite direction.

[0063] In some embodiments, such as Figure 3 , Figure 5 and Figure 6 As shown, the drive assembly 4 includes a drive gear 12 and a pair of drive toothed plates 13. The drive gear 12 is positioned between a pair of support mechanisms. The drive gear 12 is connected to a drive motor 11, and the output shaft of the drive motor 11 drives the drive gear 12 to rotate. The pair of drive toothed plates 13 are connected through the drive gear 12. The end of each drive toothed plate 13 furthest from the drive gear 12 is connected to a corresponding support mechanism. Preferably, the two drive toothed plates 13 are arranged in parallel and are meshed with the front and rear sides of the same drive gear 12. The drive gear 12 can drive the pair of drive toothed plates 13 to move relative to each other by rotation, thereby driving the pair of support mechanisms to move synchronously in opposite directions or in the opposite direction. The structure of this drive assembly 4 enables the synchronous transmission of a pair of driving forces by a single drive motor 11, thereby reliably driving a pair of clamping parts on the left and right sides of the workpiece to move synchronously in opposite directions or in the opposite direction, achieving reliable centering, clamping, and accurate positioning and fixing of the workpiece by the clamping assembly 3.

[0064] It should be noted that the preferred drive motor 11 is a servo motor, electrically connected to an external power source, and can be controlled by a control switch. The preferred drive motor 11 is fixedly connected to the drive gear 12 via a coupling, thereby achieving reliable transmission of driving force.

[0065] In some embodiments, such as Figures 7 to 10As shown, the welding machine also includes a guide rail 5 and a traveling assembly 6. The guide rail 5 is arranged in an arched structure along the radial direction of the workpieces to be welded, so as to provide a circumferential guiding effect for the movement of the welding assembly 2. Preferably, the middle part of the guide rail 5 is located above the joint of the two workpieces to be welded, and the two ends of the guide rail 5 are respectively connected to the receiving seat 1, i.e. Figure 7 As shown. The traveling assembly 6 is movably mounted on the guide rail 5. The traveling assembly 6 is connected to the welding assembly 2. The traveling assembly 6 is adapted to drive the welding assembly 2 to move along the guide rail 5 so that the welding assembly 2 can surround and weld the joint.

[0066] It should be noted that, in order to ensure that the welding assembly 2 can be welded around the cylindrical workpiece, the guide rail 5 is preferably set above the workpiece in a semi-circular arched structure.

[0067] It should be noted that, in order to improve the installation reliability of the guide rail 5 and the receiving seat 1, and to effectively ensure that the welding assembly 2 moves in a semi-circular shape relative to the workpiece, the receiving seat 1 preferably has upright plates 18 on both sides of the partition. The tops of the upright plates 18 on both sides are connected to the two ends of the guide rail 5. The upright plates 18 stand on the partition, ensuring that the line connecting the two ends of the guide rail 5 passes through the axis of the workpiece, thereby ensuring that the welding assembly 2 can move around at least half the circumference of the workpiece, avoiding missed welding positions, and thus improving the welding quality.

[0068] In some specific embodiments, such as Figure 7 and Figure 8 As shown, the guide rail 5 includes a first annular plate 19, a second annular plate 20, and a traveling toothed plate 22. The first annular plate 19 and the second annular plate 20 are respectively arranged in an arched structure along the radial direction of the workpiece to be welded. The first annular plate 19 is located below the second annular plate 20. These structural arrangements allow for an annular movement space between the first annular plate 19 and the second annular plate 20, which can partially surround the workpiece to be welded, providing an annular track guide for the movement of the workpiece assembly around the workpiece. Figure 8 As shown, the traveling toothed plate 22 is connected to the surface of the second annular plate 20 facing the first annular plate 19. The traveling assembly 6 includes a traveling gear 26, which meshes with the traveling toothed plate 22, and the traveling gear 26 is movable along the annular travel space, i.e., as shown... Figure 7 As shown. That is, through the meshing of the traveling gear 26 and the traveling tooth plate 22, the traveling gear 26 can drive the entire traveling assembly 6 to move in the annular moving space, forming a motion trajectory around the joint of the tubular workpiece to be welded, thereby driving the welding assembly 2 to achieve efficient and accurate circumferential welding of the workpiece to be welded, effectively improving welding efficiency and welding quality.

[0069] In some specific embodiments, such as Figure 9 and Figure 10As shown, the traveling assembly 6 also includes a traveling frame and a traveling motor 25. The traveling drive shaft of the traveling gear 26 is horizontally positioned on top of the traveling frame. One end of the traveling drive shaft is connected to the traveling motor 25. The bottom of the traveling frame is connected to the welding assembly 2. The traveling frame moves on the guide rail 5 via the traveling gear 26 at the top, thereby driving the welding assembly 2 at the bottom to perform circumferential welding around the outer surface of the workpiece. Furthermore, this structural arrangement ensures that the welding torch tip of the welding assembly 2 always faces the workpiece, facilitating welding and improving welding efficiency and accuracy.

[0070] In some specific embodiments, such as Figure 9 and Figure 10 As shown, the traveling frame includes a hanging plate 23, a mounting plate 24, a limiting plate 29, a connecting column 27, and an assembly plate 28. The hanging plate 23 is located below the guide rail 5. The mounting plate 24 and the limiting plate 29 are both connected to the upper part of the hanging plate 23 and are arranged side by side on the front and rear sides of the guide rail 5, so that the hanging plate 23, the mounting plate 24, and the limiting plate 29 form an assembly position, so that the traveling gear 26 can rotate in this assembly position and mesh with the traveling gear plate 22 connecting the guide rail 5, thereby facilitating the movable assembly of the traveling component 6 with the guide rail 5, improving the stability of the assembly and the structural reliability of the traveling component 6. One end of the traveling drive shaft is connected to the limiting plate 29, and the other end of the traveling drive shaft passes through the mounting plate 24 and is connected to the traveling motor 25. One end of the connecting column 27 is connected to the bottom of the hanging plate 23, and the other end of the connecting column 27 is connected to the welding component 2 through the assembly plate 28. The above structure provides the walking frame with a reliable connection structure, which can not only achieve reliable walking drive, but also ensure that the welding gun of welding component 2 is accurately aligned with the joint of the workpiece to be welded, thereby improving welding accuracy and automation.

[0071] It should be noted that the preferred walking motor 25 is a servo motor, which is electrically connected to an external power source and controlled by a control switch.

[0072] It should be noted that, in order to ensure better stability of the traveling frame during travel, it is preferable that the top of the hanging plate 23 slides in contact with the inner arc surface (the surface facing the welded part) of the first annular plate 19, and the rear side of the hanging plate 23 is fixedly installed with a limiting plate 29 by bolts. The front surface of the limiting plate 29 slides in contact with the rear surface of the first annular plate 19 and the second annular plate 20. Preferably, the rear surface of the mounting plate 24 slides in contact with the front surface of the first annular plate 19 and the second annular plate 20. The traveling motor 25 is fixed on the front surface of the mounting plate 24. The assembly position formed by the mounting plate 24 and the limiting plate 29 can play a role in limiting and protecting the meshing of the guide rail 5 and the traveling gear 26.

[0073] The welding method provided by the present invention is described below. The welding method described below can be referred to in correspondence with the welding machine described above.

[0074] The welding method provided in this embodiment of the invention is performed using the aforementioned welding machine. The welding method includes a loading and clamping step and a welding step. The loading step enables alignment of the opposite ends of two workpieces to be welded, as well as clamping, fixing, and flexibly adjusting the position of the workpieces. The welding step enables efficient and accurate circumferential welding at the joint of the workpieces. Furthermore, by performing this welding method using the aforementioned welding machine, the welding method possesses all the advantages of the aforementioned welding machine, which will not be elaborated further here.

[0075] Step 1, the material loading and clamping step, includes: placing two parts to be welded into two sets of clamping components 3 respectively, and aligning the opposite ends of the two parts to be welded; driving each pair of clamping parts of each set of clamping components 3 to move towards each other along the radial direction of the parts to be welded, so that each pair of clamping parts can clamp and fix to the outer edge of the parts to be welded on the corresponding side.

[0076] The loading and clamping step in this first step can use the clamping component 3 to quickly clamp and fix the two parts to be welded and accurately position them together, thus improving work efficiency.

[0077] Step 2, welding steps, including: driving welding assembly 2 to weld the joint of the two parts to be welded; after the weld of the upper part of the joint is completed, driving the two parts to be welded to rotate synchronously in the corresponding clamping assembly 3 so that the welded part rotates to the lower position; driving welding assembly 2 to weld the remaining part of the joint of the two parts to be welded to complete the circumferential welding of the joint.

[0078] In the second welding step, the welding position is changed by the synchronous rotation of the two parts to be welded. During the rotation, the clamping mechanism effectively prevents axial and radial movement of the parts. Furthermore, this welding step combines the partial circumferential welding of welding assembly 2 with the aforementioned rotation of the parts to be welded to adjust their welding position. This synergy eliminates the need for reloading, clamping, and rejoining during the welding process, improving welding efficiency and accuracy. It also prevents misalignment between welding assembly 2 and the parts to be welded, thus avoiding defects that could lead to decreased welding quality and ultimately enhancing the overall weld quality.

[0079] Based on the above, the specific implementation process of the welding machine in this embodiment of the invention performing the above welding method is as follows.

[0080] In the above-described feeding and clamping steps, two tubular workpieces to be welded are placed between two clamping plates 7. The drive motor 11 is started, and the drive motor 11 is controlled to drive the drive gear 12 to rotate clockwise. The rotating drive gear 12 drives the two drive tooth plates 13 to move relative to each other. The two drive tooth plates 13 respectively drive the bottom plates 16 of the two sets of drive frames 10 to move closer to each other. In each set of drive frames 10, the bottom plate 16 drives the top plate 15 to move through the vertical plate 17, and the top plate 15 drives the mating plate 14 to move along the slide groove 30. The mating plate 14 drives the clamping plate 7 on this side to move through the drive plate 9. Thus, a pair of clamping plates 7 are driven to move towards each other, thereby reliably clamping the tubular workpieces to be welded.

[0081] The above welding steps further include a rotation welding sub-step and a circumferential welding sub-step.

[0082] In the rotational welding sub-step, the travel motor 25 is started first. The travel motor 25 drives the travel gear 26 to rotate. Under the meshing action of several teeth on the travel gear plate 22, the travel gear 26 drives the travel assembly 6 to move in the annular moving space. During the movement of the travel assembly 6, the welding assembly 2, which is mounted on the mounting plate 28 of the travel frame, welds the joint of the two tubular parts to be welded, completing at least half a circumference of weld.

[0083] In the circumferential welding sub-step, after completing the aforementioned rotation welding step, it is equivalent to completing the weld seam of half a circumference of the two tubular parts to be welded. Then, directly rotate the two tubular parts to be welded, so that the unwelded parts of the two tubular parts are rotated from a downward position to an upward position. Then repeat the above-mentioned rotation welding sub-step to complete the complete circumferential welding of the joint of the two tubular parts.

[0084] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A welding machine, characterized in that, include: Receiving seat; A welding assembly is disposed on the top of the receiving seat, and the welding assembly is adapted to weld the joint of two parts to be welded; Two sets of clamping assemblies are installed on the receiving seat. The two sets of clamping assemblies are respectively located on both sides of the welding assembly. Each set of clamping assemblies can clamp the workpiece to be welded on the corresponding side so that the two workpieces to be welded are coaxially connected. The clamping assembly includes at least one pair of clamping parts, each pair of clamping parts being able to move in opposite directions or in the radial direction of the workpiece to be welded; The receiving seat includes a mounting cavity and a partition plate. The partition plate is placed flat on the top of the mounting cavity and is divided into two welding areas. The welding assembly is disposed at the connection between the two welding areas. The two sets of clamping components are symmetrically arranged in the two welding zones; Each pair of clamping parts includes a pair of clamping plates and several auxiliary rollers. The pair of clamping plates clamp the left and right sides of the workpiece to be welded in opposite directions along the radial direction of the workpiece to be welded. Several auxiliary rollers are connected to the surface of each clamping plate facing the workpiece to be welded. The pair of clamping plates can be pressed and attached to the outer surface of the workpiece to be welded by each of the auxiliary rollers. The clamping assembly is configured such that, during the welding process, a pair of clamping plates move radially towards each other along the workpiece to press against the surface of the workpiece, so that the clamping plates are relatively stationary with respect to the outer surface of the workpiece; when it is necessary to rotate the workpiece, the pair of clamping plates move in opposite directions to reduce the clamping force, thereby causing the workpiece to rotate relative to the clamping plates and changing the circumferential position of the workpiece. The welding machine also includes: The guide rail is arranged in an arched structure along the radial direction of the workpiece to be welded. The middle part of the guide rail is located above the joint of the two workpieces to be welded, and the two ends of the guide rail are respectively connected to the receiving seat. A traveling assembly is movably mounted on the guide rail. The traveling assembly is connected to the welding assembly and is adapted to drive the welding assembly to move along the guide rail so that the welding assembly can surround and weld the joint. The welding machine can drive the welding assembly to weld the joint of two parts to be welded; after the weld of the upward part of the joint is completed, the two parts to be welded are driven to rotate synchronously in the corresponding clamping assembly so that the welded part is rotated to the downward position; the welding assembly is driven to weld the remaining part of the joint of the two parts to be welded to complete the circumferential welding of the joint.

2. The welding machine according to claim 1, characterized in that, The welding machine also includes: Two sets of drive components are respectively installed in the mounting cavity and located below the two welding areas; the two sets of drive components are respectively connected to the two sets of clamping components, and each set of drive components is used to drive the synchronous movement of each pair of clamping parts on the corresponding side.

3. The welding machine according to claim 1, characterized in that, The clamping plate is constructed in an arc shape, and the auxiliary rollers are arranged at intervals along the surface of the arc-shaped clamping plate.

4. The welding machine according to claim 2, characterized in that, The welding machine also includes a pair of support mechanisms, the bottoms of which are respectively connected to the left and right sides of the drive assembly, and the tops of which are respectively connected to each pair of clamping parts. The partition plate has two sliding grooves in each of its two welding zones, and the two sliding grooves are respectively arranged along the radial direction of the workpiece to be welded; A pair of support mechanisms are inserted into the corresponding slide grooves, and the drive assembly can synchronously drive the pair of support mechanisms to move in opposite directions or in the opposite direction along the slide grooves.

5. The welding machine according to claim 4, characterized in that, The support mechanism includes a drive frame, a docking plate, and a drive plate. The drive frame is disposed in the mounting cavity. The bottom of the drive frame is connected to the corresponding side of the drive assembly. The top of the drive frame is connected to the drive plate through the docking plate. The docking plate is movably inserted into the slide groove on the corresponding side. The drive plate is connected to the clamping part on the corresponding side.

6. The welding machine according to claim 5, characterized in that, The drive frame includes a base plate, a top plate, and a vertical plate. The base plate is movably disposed at the bottom of the mounting cavity and is connected to the corresponding side of the drive assembly. The top plate is disposed below the partition and is connected to the mating plate on the corresponding side. The vertical plate is vertically connected to the top plate and the base plate.

7. The welding machine according to claim 4, characterized in that, The driving component includes: A drive gear is disposed between a pair of the support mechanisms, and the drive gear is connected to a drive motor; A pair of drive tooth plates are connected by the drive gear. The end of each drive tooth plate away from the drive gear is connected to the corresponding support mechanism. The drive gear can drive the pair of drive tooth plates to move relative to each other by rotation, so as to drive the pair of support mechanisms to move synchronously in opposite directions.

8. The welding machine according to any one of claims 1-7, characterized in that, The guide rail includes a first annular plate, a second annular plate, and a traveling toothed plate. The first annular plate and the second annular plate are respectively arranged in an arched structure along the radial direction of the workpiece to be welded. The first annular plate is located below the second annular plate, and an annular moving space is left between the first annular plate and the second annular plate. The traveling toothed plate is connected to the surface of the second annular plate facing the first annular plate. The traveling assembly includes a traveling gear, which is meshed with the traveling toothed plate and can move along the annular moving space.

9. The welding machine according to claim 8, characterized in that, The walking assembly also includes a walking frame and a walking motor. The walking drive shaft of the walking gear is horizontally placed on the top of the walking frame, and one end of the walking drive shaft is connected to the walking motor. The bottom of the walking frame is connected to the welding assembly.

10. The welding machine according to claim 9, characterized in that, The traveling frame includes a hanging plate, a mounting plate, a limiting plate, a connecting column, and an assembly plate. The hanging plate is located below the guide rail. The mounting plate and the limiting plate are both connected to the upper part of the hanging plate and are arranged side by side on the front and rear sides of the guide rail. One end of the traveling drive shaft is connected to the limiting plate, and the other end of the traveling drive shaft passes through the mounting plate and is connected to the traveling motor. One end of the connecting column is connected to the bottom of the hanging plate, and the other end of the connecting column is connected to the welding assembly through the assembly plate.

11. A welding method, characterized in that, Performed using a welding machine as described in any one of claims 1 to 10; The welding method includes the following steps: Step 1, the material loading and clamping process, includes: Place the two parts to be welded in the two sets of clamping assemblies respectively, and align the opposite ends of the two parts to be welded; Drive each pair of clamping parts of each set of clamping assemblies to move in opposite directions along the radial direction of the workpiece to be welded, so that each pair of clamping parts can clamp and fix to the outer edge of the workpiece to be welded on the corresponding side; Step 2, welding steps, including: The drive welding assembly welds the joint between the two parts to be welded; After the weld seam at the joint facing upwards is completed, the two parts to be welded are driven to rotate synchronously in the corresponding clamping assembly so that the weld seam is rotated to the downward position. The welding assembly is driven to weld the remaining portion of the joint between the two workpieces to be welded, thereby completing the circumferential welding of the joint.

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