Welding equipment for welding pipe fitting and connecting column of bicycle

Abstract

The utility model discloses welding equipment for welding a pipe fitting and a connecting column of a bicycle. The welding equipment comprises a platform, a first limiting mechanism, a second limiting mechanism, a welding robot and a driving mechanism. The platform is provided with a first welding area and a second welding area. The first limiting mechanism is arranged on the first welding area. The second limiting mechanism is arranged on the second welding area. And the welding robot is used for welding the connecting column on the pipe fitting. The driving mechanism can drive the platform to align the first welding area or the second welding area to the welding robot. The driving mechanism drives the platform to enable the first welding area on the platform to be aligned with the welding robot or enable the second welding area on the platform to be aligned with the welding robot so as to switch between the first welding area and the second welding area, and therefore first-time welding and second-time welding of the pipe fitting and the connecting column are achieved. And therefore, the working efficiency of the welding equipment is improved, and the welding quality of the pipe fitting and the connecting column can be improved.

Description

Technical Field

[0001] The embodiments of the present utility model relate to the technical field of bicycle manufacturing, and more specifically, the present utility model relates to a welding device for welding pipes and connecting posts of a bicycle. Background Art

[0002] With the continuous progress of society and the significant improvement in people's quality of life, more and more people are turning to cycling as a means of transportation. To enhance the convenience of riding, bicycle designs have incorporated front-mounted baskets for carrying backpacks, vegetables, and other items. However, the current welding equipment used in bicycle manufacturing, particularly in the welding process between bicycle tubes and the connecting posts used to attach the baskets, faces numerous challenges.

[0003] Specifically, while operators are fixing pipes and connecting posts, welding equipment is often idle. When welding begins, operators must wait for a long time before preparing for the next round of material loading, significantly reducing the efficiency of both the equipment and the operators. Furthermore, given that connecting posts must be precisely welded to the pipe wall, the limiting mechanisms in existing welding equipment often obstruct the welding robot's operating path. This not only disrupts the smoothness of the welding process but can also result in a poor bond between the pipe and the connecting post, severely impacting the final product quality. Utility Model Content

[0004] In order to solve one or more technical problems mentioned above, the utility model provides a welding device for welding pipes and connecting posts of bicycles, which can improve the working efficiency of the welding device and also improve the welding quality of the pipes and connecting posts.

[0005] The present invention provides a welding device for welding bicycle pipes and connecting posts, comprising:

[0006] a platform having a first welding area and a second welding area thereon;

[0007] a first limiting mechanism, which is provided on the first welding area;

[0008] a second limiting mechanism, which is provided on the second welding area;

[0009] a welding robot, configured to weld the connecting column to the pipe fitting; and

[0010] a driving mechanism capable of driving the platform to align the first welding area or the second welding area with the welding robot;

[0011] The driving mechanism drives the first welding area to align with the welding robot, and the welding robot performs a first welding on the connection position between the connecting column and the pipe fitting. During the process of the welding robot performing the first welding on the pipe fitting and the connecting column, the first limiting mechanism can keep the connecting column always in close contact with the pipe fitting.

[0012] The driving mechanism drives the second welding area to align with the welding robot, and the welding robot performs a second welding on the connection position of the connecting column and the pipe fitting. Before the welding robot performs the second welding on the pipe fitting and the connecting column, the second limiting mechanism can position the pipe fitting and the connecting column that have undergone the first welding, and during the process of the welding robot performing the second welding on the pipe fitting and the connecting column, the second limiting mechanism can limit the pipe fitting that has undergone the first welding.

[0013] Furthermore, the first limiting mechanism includes:

[0014] a first bottom plate, which is provided on the first welding area;

[0015] Two first limiting seats are arranged on the first bottom plate at intervals along the axial direction of the pipe and are provided with first limiting grooves that can fit with the ends of the pipe.

[0016] Furthermore, the first limiting mechanism further includes a first baffle which is respectively provided on the two first limiting seats and can abut against the end portion of the pipe to limit the movement of the pipe along its own axial direction.

[0017] Furthermore, the first limiting mechanism further includes:

[0018] A support frame, which is arranged on the first bottom plate and has a first limiting hole;

[0019] a first push rod, which is inserted into the first limiting hole and is capable of moving along its own axial direction in the first limiting hole;

[0020] a first limiting block connected to the first push rod, wherein the bottom surface of the first limiting block can abut against the top surface of the connecting column;

[0021] Among them, pushing the first push rod can cause the bottom surface of the first limiting block to approach the connecting column and press the connecting column against the pipe, and the first limiting hole can keep the first push rod moving along the preset path.

[0022] Furthermore, the first limiting mechanism further includes a positioning column which is provided on the first limiting block and can pass through a connecting hole provided on the connecting column.

[0023] Furthermore, the second limiting mechanism includes:

[0024] a second bottom plate, which is provided on the second welding area;

[0025] Two second limiting seats are arranged on the second bottom plate at intervals along the axial direction of the pipe and are provided with second limiting grooves that can fit with the ends of the pipe.

[0026] Furthermore, the second limiting mechanism further includes:

[0027] a second baffle, which is provided on one of the two limiting seats and can abut against one end portion of the pipe;

[0028] a fixing seat, which is provided on the second bottom plate and has a second limiting hole;

[0029] a second push rod, which is inserted into the second limiting hole and is capable of moving along its own axial direction in the second limiting hole;

[0030] a second limiting block connected to the second push rod, wherein a side surface of the second limiting block is capable of abutting against an end portion of the pipe;

[0031] Pushing the second limiting block can cause the side surface of the second limiting block to approach the pipe to press the pipe against the second baffle, and the second limiting hole can keep the second push rod moving along a preset path.

[0032] Furthermore, the second limiting mechanism also includes a fixing block provided on the second bottom plate and a positioning block detachably provided between the fixing block and the pipe fitting, wherein the side surface of the positioning block can abut against the surface of the connecting column after the first welding.

[0033] Furthermore, the welding robot includes a welding head capable of welding the pipe fitting and the connecting column and a moving component for driving the welding head to move.

[0034] Furthermore, the driving mechanism includes a motor, a pneumatic cylinder or a hydraulic cylinder and a transmission assembly for transmitting power of the motor, the pneumatic cylinder or the hydraulic cylinder to the platform.

[0035] The welding equipment provided in this embodiment drives the platform by means of a driving mechanism so that the first welding area on the platform is aligned with the welding robot or the second welding area on the platform is aligned with the welding robot, so as to switch between the first welding area and the second welding area, thereby realizing the first welding and the second welding of the pipe fittings and the connecting column. When the welding robot performs the first welding on a group of pipe fittings and connecting columns on the first welding area, the operator can install another group of pipe fittings and connecting columns that have been welded for the first time (i.e., the pipe fittings and connecting columns that need to be welded for the second time) on the second welding area. Conversely, when the welding robot performs the second welding on a group of pipe fittings and connecting columns on the second welding area, the operator can install another group of pipe fittings and connecting columns that need to be welded for the first time on the first welding area. The above-mentioned improved design can avoid the welding equipment from being idle for a long time, and the waiting time of the operator is also greatly reduced, thereby improving the welding efficiency of the pipe fittings and connecting columns. The above-mentioned improved design replaces the one-time welding method in the prior art, and keeps the connecting column close to the pipe fitting when the pipe fitting and the connecting column are welded for the first time (only spot welding is performed on the pipe fitting and the connecting column). Since the welding equipment only limits the pipe fitting when the pipe fitting and the connecting column are welded for the second time (the connecting column and the pipe fitting are completely welded together on the basis of spot welding), an avoidance is provided for the operation path of the welding robot at the position where the pipe fitting and the connecting column need to be welded, thereby avoiding the limiting mechanism in the welding equipment from obstructing the operation path of the welding robot, making the welding process smoother, and also avoiding the problem of poor bonding effect between the pipe fitting and the connecting column caused by the welding robot avoiding the limiting mechanism, thereby improving the welding quality of the pipe fitting and the connecting column. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The above and other objects, features and advantages of the exemplary embodiments of the present invention will become readily understood by reading the detailed description below with reference to the accompanying drawings. In the accompanying drawings, several embodiments of the present invention are shown in an exemplary and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0037] Figure 1 A schematic structural diagram of a welding device for welding bicycle pipes and connecting posts provided by an embodiment of the present utility model after the pipes and connecting posts are installed is shown;

[0038] Figure 2 A schematic structural diagram of a pipe fitting and a connecting column according to an embodiment of the present utility model is shown;

[0039] Figure 3 It shows a schematic structural diagram of the first limiting mechanism provided in an embodiment of the present utility model;

[0040] Figure 4The figure shows a structural diagram of the second limiting mechanism provided in an embodiment of the present utility model.

[0041] In the picture:

[0042] 1. Platform; 11. First welding area; 12. Second welding area;

[0043] 2. First limiting mechanism; 21. First bottom plate; 22. First limiting seat; 221. First limiting groove; 23. First baffle; 24. Support frame; 241. First limiting hole; 25. First push rod; 26. First limiting block; 27. Positioning column

[0044] 3. Second limiting mechanism; 31. Second bottom plate; 32. Second limiting seat; 321. Second limiting groove; 33. Second baffle; 34. Fixed seat; 341. Second limiting hole; 35. Second push rod; 36. Second limiting block; 37. Fixed block; 38. Positioning block;

[0045] 4. Welding robot; 41. Welding head; 42. Moving component;

[0046] 5. Driving mechanism;

[0047] 100, pipe fitting; 200, connecting column; 201, connecting hole. DETAILED DESCRIPTION

[0048] The following will be combined with the accompanying drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the embodiments described are part of the embodiments of the present disclosure, not all of them. Based on the embodiments of the present disclosure, all other embodiments obtained by those skilled in the art without making any creative efforts shall fall within the scope of protection of the present disclosure.

[0049] Figure 1 FIG. 1 shows a structural diagram of a welding device for welding a pipe fitting 100 and a connecting post 200 of a bicycle provided in this embodiment after the pipe fitting 100 and the connecting post 200 are installed. Figure 2 FIG. 1 shows a schematic structural diagram of the pipe fitting 100 and the connecting column 200 involved in this embodiment. Figure 1 and Figure 2As shown, a welding apparatus for welding a bicycle pipe 100 and a connecting post 200 includes a platform 1, a first limiting mechanism 2, a second limiting mechanism, a welding robot 4, and a drive mechanism 5. The platform 1 is provided with a first welding area 11 and a second welding area 12. The first limiting mechanism 2 is provided on the first welding area 11. The second limiting mechanism is provided on the second welding area 12. The welding robot 4 is used to weld the connecting post 200 to the pipe 100. The drive mechanism 5 is capable of driving the platform 1 to align the first welding area 11 or the second welding area 12 with the welding robot 4. Among them, the driving mechanism 5 drives the first welding area 11 to align with the welding robot 4, and the welding robot 4 performs the first welding on the connection position of the connecting column 200 and the pipe fitting 100. During the process of the welding robot 4 performing the first welding on the pipe fitting 100 and the connecting column 200, the first limiting mechanism 2 can keep the connecting column 200 always close to the pipe fitting 100; the driving mechanism 5 drives the second welding area 12 to align with the welding robot 4, and the welding robot 4 performs the second welding on the connection position of the connecting column 200 and the pipe fitting 100. Before the welding robot 4 performs the second welding on the pipe fitting 100 and the connecting column 200, the second limiting mechanism can position the pipe fitting 100 and the connecting column 200 that have been welded for the first time. During the process of the welding robot 4 performing the second welding on the pipe fitting 100 and the connecting column 200, the second limiting mechanism can limit the pipe fitting 100 that has been welded for the first time.

[0050] The welding equipment provided in this embodiment drives the platform 1 via the drive mechanism 5 so that the first welding area 11 on the platform 1 is aligned with the welding robot 4, or the second welding area 12 on the platform 1 is aligned with the welding robot 4, thereby switching between the first welding area 11 and the second welding area 12, thereby performing the first welding and the second welding on the pipe 100 and the connecting column 200. While the welding robot 4 is performing the first welding on a group of pipes 100 and connecting columns 200 in the first welding area 11, the operator can install another group of pipes 100 and connecting columns 200 that have undergone the first welding (i.e., the pipes 100 and connecting columns 200 that require a second welding) in the second welding area 12. Conversely, while the welding robot 4 is performing the second welding on a group of pipes 100 and connecting columns 200 in the second welding area 12, the operator can install another group of pipes 100 and connecting columns 200 that require a first welding in the first welding area 11. The above-mentioned improved design can prevent the welding equipment from being idle for a long time, and the waiting time of the operator is greatly reduced, thereby improving the welding efficiency of the pipe fitting 100 and the connecting column 200. The above-mentioned improved design replaces the one-time welding method in the prior art, and keeps the connecting column 200 close to the pipe fitting 100 when the pipe fitting 100 and the connecting column 200 are welded for the first time (only spot welding is performed on the pipe fitting 100 and the connecting column 200). Since the welding equipment only limits the pipe fitting 100 when the pipe fitting 100 and the connecting column 200 are welded for the second time (the connecting column 200 and the pipe fitting 100 are completely welded together on the basis of spot welding), an avoidance is provided for the operation path of the welding robot 4 at the position where the pipe fitting 100 and the connecting column 200 need to be welded, thereby avoiding the limiting mechanism in the welding equipment from obstructing the operation path of the welding robot 4, making the welding process smoother, and also avoiding the problem of poor bonding effect of the pipe fitting 100 and the connecting column 200 caused by the avoidance of the limiting mechanism by the welding robot 4, thereby improving the welding quality of the pipe fitting 100 and the connecting column 200.

[0051] Figure 3 FIG. 2 shows a schematic structural diagram of the first limiting mechanism 2 provided in this embodiment. Figure 3 and combined Figure 1 and Figure 2 As shown, the first limiting mechanism 2 includes a first base plate 21 and two first limiting seats 22. The first base plate 21 is disposed on the first welding area 11. The two first limiting seats 22 are spaced apart on the first base plate 21 along the axial direction of the pipe 100 and are provided with first limiting grooves 221 that are adapted to engage with the ends of the pipe 100. Using the first limiting grooves 221 to limit the position of the pipe 100 not only effectively limits the position of the pipe 100, but also facilitates the operator's placement and removal of the pipe 100 into and from the first limiting grooves 221.

[0052] Specifically, the cross-section of the first limiting groove 221 along the axial direction of the pipe 100 is semicircular, so as to support the pipe 100 and limit the movement of the pipe 100 along its own radial direction. The semicircular shape can ensure the maximum limiting area while making it convenient for the operator to place the pipe 100 into the first limiting groove 221 or take it out of the first limiting groove 221.

[0053] Furthermore, the first limiting mechanism 2 further includes first baffles 23 respectively provided on the two first limiting seats 22 and capable of abutting against the ends of the pipe 100 to limit the movement of the pipe 100 along its own axial direction.

[0054] Furthermore, the first limiting mechanism 2 also includes a support frame 24, a first push rod 25 and a first limiting block 26. The support frame 24 is arranged on the first base plate 21, and is provided with a first limiting hole 241. The first push rod 25 is passed through the first limiting hole 241 and can move along its own axial direction in the first limiting hole 241. The first limiting block 26 is connected to the first push rod 25, and the bottom surface of the first limiting block 26 can abut against the top surface of the connecting column 200. Among them, pushing the first push rod 25 can cause the bottom surface of the first limiting block 26 to approach the connecting column 200 and press the connecting column 200 against the pipe fitting 100, and the first limiting hole 241 can keep the first push rod 25 moving along the preset path.

[0055] The bottom surface of the first limiting block 26 abuts against the connecting post 200 through surface contact, thereby maintaining the connecting post 200 fully pressed against the pipe 100 and preventing the connecting post 200 from shifting during welding to the pipe 100. The first limiting hole 241 ensures that the first push rod 25 can move along a preset path while pushing the first limiting block 26 toward the connecting post 200, thereby enabling the first limiting block 26 to press the connecting post 200 against the preset position on the pipe 100. The limiting method of the first limiting hole 241 is more convenient for processing and manufacturing.

[0056] Furthermore, the first limiting mechanism 2 also includes a positioning column arranged on the first limiting block 26 and capable of passing through the connecting hole 201 on the connecting column 200. When the first limiting block 26 approaches the connecting column 200, the positioning column passes through the connecting hole 201 on the connecting column 200 to position the position of the connecting column 200, so that the connecting column 200 can be maintained at a preset position on the pipe fitting 100.

[0057] It should be noted that the preset position on the pipe fitting 100 can be any position on the pipe wall of the pipe fitting 100. In practice, it can be adjusted on the pipe fitting 100 according to the requirements of the position of the connecting column 200. The preset path of the first push rod 25 is the moving path corresponding to the preset position. In practice, the position of the first limiting hole 241 can be adjusted according to the preset position.

[0058] Figure 4 FIG. 1 shows a schematic structural diagram of the second limiting mechanism provided in this embodiment. Figure 4 Combined with Figure 1 and Figure 2 As shown, the second limiting mechanism includes a second base plate 31 and two second limiting seats 32. The second base plate 31 is disposed on the second welding region 12. The two second limiting seats 32 are spaced apart on the second base plate 31 along the axial direction of the pipe 100 and are provided with second limiting grooves 321 that are adapted to engage with the ends of the pipe 100. The use of the second limiting grooves 321 to limit the pipe 100 effectively limits the position of the pipe 100 and facilitates the operator's placement and removal of the pipe 100 into and from the second limiting grooves 321.

[0059] In this embodiment, to save manufacturing costs, the second limiting seat 32 and the first limiting seat 22 are both used to limit the pipe 100 and are therefore configured to have the same structure. Therefore, the specific structure of the second limiting seat 32 is not described in detail herein.

[0060] Furthermore, the second limiting mechanism also includes a second baffle 33, a fixing seat 34, a second push rod 35 and a second limiting block 36. The second baffle 33 is provided on one of the two limiting seats and can abut against one end of the pipe fitting 100. The fixing seat 34 is provided on the second base plate 31 and is provided with a second limiting hole 341. The second push rod 35 is passed through the second limiting hole 341 and can move along its own axial direction in the second limiting hole 341. The second limiting block 36 is connected to the second push rod 35, and the side of the second limiting block 36 can abut against the end of the pipe fitting 100. Pushing the second limiting block 36 can cause the side of the second limiting block 36 to approach the pipe fitting 100, so as to press the pipe fitting 100 against the second baffle 33, and the second limiting hole 341 can keep the second push rod 35 moving along the preset path.

[0061] The side surface of the second limiting block 36 abuts against the end of the pipe 100 through surface contact, thereby fully pressing the pipe 100 against the second baffle 33 to limit the axial position of the pipe 100. The second limiting hole 341 ensures that the second push rod 35 can move along a preset path while pushing the second limiting block 36 toward the pipe 100, thereby enabling the second limiting block 36 to stably limit the position of the pipe 100, thereby ensuring the stability of the pipe 100 when it is fixed. The limiting method of the second limiting hole 341 is also more convenient for processing and manufacturing.

[0062] Furthermore, the second limiting mechanism includes a fixing block 37 disposed on the second base plate 31 and a positioning block 38 detachably disposed between the fixing block 37 and the pipe 100. The side of the positioning block 38 is capable of abutting against the surface of the connecting column 200 after the first weld. The detachable positioning block 38 can be removed after positioning the connecting column 200 after the first weld, thereby providing more operating paths for the welding robot 4 and improving the smoothness of the welding process.

[0063] In this embodiment, the detachable connection of the positioning block 38 is an overlap connection, that is, the positioning block 38 is placed between the fixing block 37 and the second limiting seat 32, the pipe 100 and the connecting column 200 that have undergone the first welding are placed, and the connecting column 200 is abutted against the side of the positioning block 38, thereby achieving re-positioning of the pipe 100 and the connecting column 200. In other embodiments, the positioning block 38 can also be directly detachably connected to the second base plate 31 through a connection method such as plugging or snapping.

[0064] Furthermore, the welding robot 4 includes a welding head 41 capable of welding the pipe 100 and the connecting column 200 and a moving assembly 42 for driving the welding head 41 to move, so as to achieve welding of the pipe 100 and the connecting column 200 .

[0065] It should be noted that the welding head 41 can be a welding tool such as a welding gun or a similar welding tool in the prior art, and the moving component 42 can be a four-axis manipulator or a similar manipulator in the prior art. Since the welding robot 4 is a common welding device in the prior art, the specific structure of the welding robot 4 is not described in detail in this embodiment. Any welding robot 4 in the prior art that can realize the set operation path to weld the workpiece should be within the protection scope of the disclosed embodiment.

[0066] In this embodiment, the driving mechanism 5 is a motor and the transmission assembly is a gear set. The motor drives one gear in the gear set to rotate and transmits power to the platform 1 through another gear, causing the platform 1 to rotate, thereby driving the platform 1 to align the first welding area 11 or the second welding area 12 with the welding robot 4.

[0067] In other embodiments, the driving mechanism 5 can also be a linear driving mechanism 5 such as a cylinder or a hydraulic cylinder, and the transmission component can be a pin or bolt used to fix the platform 1 and the piston rod of the cylinder or hydraulic cylinder, etc., and can also realize the driving platform 1 to align the first welding area 11 or the second welding area 12 with the welding robot 4.

[0068] In the above description of this application, unless otherwise expressly specified or limited, terms such as "fixed," "installed," "connected," or "connected" should be understood in a broad sense. For example, with respect to the term "connected," it can mean a fixed connection, a detachable connection, or an integral connection; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean internal communication between two elements or an interaction between two elements. Therefore, unless otherwise expressly defined in this application, those skilled in the art can understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0069] According to the above description of the present application, those skilled in the art may also understand that the terms used below, such as "upper", "bottom", "axial", "radial" and other terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings of the present application, which are only for the purpose of facilitating the explanation of the scheme of the present invention and simplifying the description, rather than explicitly or implicitly indicating that the device or element involved must have the specific orientation, be constructed and operated in a specific orientation. Therefore, the above-mentioned orientation or positional relationship terms cannot be understood or interpreted as limitations on the scheme of the present invention.

[0070] In addition, the terms "first" or "second" used in this application to refer to numbers or ordinal numbers are used for descriptive purposes only and should not be understood as explicitly or implicitly indicating relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this application, the meaning of "plurality" is at least two, such as two, three or more, etc., unless otherwise clearly and specifically defined.

[0071] Although multiple embodiments of the present invention have been shown and described herein, it will be apparent to those skilled in the art that such embodiments are provided by way of example only. Those skilled in the art may conceive of many modifications, changes, and alternatives without departing from the concept and spirit of the present invention. It should be understood that in practicing the present invention, various alternatives to the embodiments of the present invention described herein may be adopted. The appended claims are intended to define the scope of protection of the present invention and therefore cover equivalents or alternatives within the scope of these claims.

Claims

1. A welding device for welding bicycle pipes and connecting posts, characterized in that: include: a platform having a first welding area and a second welding area thereon; a first limiting mechanism, which is provided on the first welding area; a second limiting mechanism, which is provided on the second welding area; a welding robot, configured to weld the connecting column to the pipe fitting; as well as a driving mechanism capable of driving the platform to align the first welding area or the second welding area with the welding robot; The driving mechanism drives the first welding area to align with the welding robot, and the welding robot performs a first welding on the connection position between the connecting column and the pipe fitting. During the process of the welding robot performing the first welding on the pipe fitting and the connecting column, the first limiting mechanism can keep the connecting column always in close contact with the pipe fitting. The driving mechanism drives the second welding area to align with the welding robot, and the welding robot performs a second welding on the connection position of the connecting column and the pipe fitting. Before the welding robot performs the second welding on the pipe fitting and the connecting column, the second limiting mechanism can position the pipe fitting and the connecting column that have undergone the first welding, and during the process of the welding robot performing the second welding on the pipe fitting and the connecting column, the second limiting mechanism can limit the pipe fitting that has undergone the first welding.

2. The welding equipment according to claim 1, characterized in that The first limiting mechanism includes: a first bottom plate, which is provided on the first welding area; Two first limiting seats are arranged on the first bottom plate at intervals along the axial direction of the pipe and are provided with first limiting grooves that can fit with the ends of the pipe.

3. The welding equipment according to claim 2, characterized in that The first limiting mechanism further includes a first baffle which is respectively provided on the two first limiting seats and can abut against the end portion of the pipe to limit the movement of the pipe along its own axial direction.

4. The welding equipment according to claim 2, characterized in that The first limiting mechanism further includes: A support frame, which is arranged on the first bottom plate and has a first limiting hole; a first push rod, which is inserted into the first limiting hole and is capable of moving along its own axial direction in the first limiting hole; a first limiting block connected to the first push rod, wherein the bottom surface of the first limiting block can abut against the top surface of the connecting column; Among them, pushing the first push rod can cause the bottom surface of the first limiting block to approach the connecting column and press the connecting column against the pipe, and the first limiting hole can keep the first push rod moving along the preset path.

5. The welding device according to claim 4, characterized in that The first limiting mechanism further includes a positioning column which is arranged on the first limiting block and can pass through the connecting hole on the connecting column.

6. The welding equipment according to claim 1, characterized in that The second limiting mechanism includes: a second bottom plate, which is provided on the second welding area; Two second limiting seats are arranged on the second bottom plate at intervals along the axial direction of the pipe and are provided with second limiting grooves that can fit with the ends of the pipe.

7. The welding device according to claim 6, characterized in that The second limiting mechanism further includes: a second baffle, which is provided on one of the two limiting seats and can abut against one end portion of the pipe; a fixing seat, which is provided on the second bottom plate and has a second limiting hole; a second push rod, which is inserted into the second limiting hole and is capable of moving along its own axial direction in the second limiting hole; a second limiting block connected to the second push rod, wherein a side surface of the second limiting block is capable of abutting against an end portion of the pipe; Pushing the second limiting block can cause the side surface of the second limiting block to approach the pipe to press the pipe against the second baffle, and the second limiting hole can keep the second push rod moving along a preset path.

8. The welding device according to claim 6, characterized in that The second limiting mechanism further includes a fixing block provided on the second bottom plate and a positioning block detachably provided between the fixing block and the pipe fitting, wherein a side surface of the positioning block can abut against a surface of the connecting column after the first welding.

9. The welding device according to claim 1, characterized in that The welding robot includes a welding head capable of welding the pipe fitting and the connecting column and a moving component for driving the welding head to move.

10. The welding device according to claim 1, characterized in that The driving mechanism includes a motor, an air cylinder or a hydraulic cylinder, and a transmission assembly for transmitting power of the motor, the air cylinder or the hydraulic cylinder to the platform.

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