CN215616061U

CN215616061U - Welding system and positioning device

Info

Publication number: CN215616061U
Application number: CN202121489070.XU
Authority: CN
Inventors: 李彬; 刘博�; 李勇
Original assignee: CRRC Datong Co Ltd
Current assignee: CRRC Datong Co Ltd
Priority date: 2021-07-01
Filing date: 2021-07-01
Publication date: 2022-01-25
Anticipated expiration: 2031-07-01

Abstract

The disclosure provides a welding system and a positioning device, and relates to the technical field of welding. The welding system includes: the outer surface of the positioning circular tube is matched with the inner surface of the assembling part of the workpiece with the cylindrical assembling part; one side of the sealing plate is connected with one end of the positioning circular tube; the tooling table is connected with the other side of the sealing plate; the sealing plate is connected with the tooling table through the connecting piece; and the welding robot is used for processing the workpiece positioned on the positioning circular tube. The welding system provided by the disclosure can ensure that the workpiece is accurately positioned on the tool table, is convenient to install and disassemble, consumes less time, is not limited by the appearance of the part, can meet the requirement of batch production, and improves the production efficiency.

Description

Welding system and positioning device

Technical Field

The disclosure relates to the technical field of welding, in particular to a welding system and a positioning device.

Background

Nowadays, welding technology is commonly applied in the processing and production process of metal or nonmetal parts in factories.

Especially when welding some parts with special shapes, the fixing of the processing position and the welding of the parts with special shapes are always difficult to solve.

It is to be noted that the information disclosed in the above background section is only for enhancement of understanding of the background of the present disclosure, and thus may include information that does not constitute prior art known to those of ordinary skill in the art.

SUMMERY OF THE UTILITY MODEL

The purpose of the present disclosure is to overcome the above-mentioned deficiencies of the prior art and to provide a welding system that is accurate in positioning, convenient to assemble and not limited by the shape of the part.

Other features and advantages of the disclosure will be apparent from the following detailed description, or may be learned by practice of the disclosure in part.

According to a first aspect of embodiments of the present disclosure, there is provided a welding system comprising:

the outer surface of the positioning circular tube is matched with the inner surface of the assembling part of the workpiece with the cylindrical assembling part;

one side of the sealing plate is connected with one end of the positioning circular tube;

the tooling table is connected with the other side of the sealing plate;

the sealing plate is connected with the tooling table through the connecting piece;

and the welding robot is used for processing the workpiece positioned on the positioning circular tube.

In some embodiments of the present disclosure, based on the foregoing solution, the positioning circular tube is a cylindrical tube body having a through hole.

In some embodiments of the present disclosure, based on the foregoing solution, the sealing plate has a circular plate shape, and the diameter of the sealing plate is the same as the inner diameter of the positioning circular tube.

In some embodiments of the present disclosure, based on the foregoing solution, the sealing plate is provided with a through hole, and the through hole on the sealing plate is concentric with the circular positioning tube.

In some embodiments of the present disclosure, based on the foregoing solution, the through holes on the sealing plate are used for installing the connectors, and the diameter of the through holes on the sealing plate is the same as the diameter of the connectors.

In some embodiments of the present disclosure, based on the foregoing scheme, the tool table is provided with a plurality of through holes, and the through holes of the tool table are arranged in an array;

the through hole of the tool table is used for installing the connecting piece, and the diameter of the through hole in the tool table is the same as that of the connecting piece.

In some embodiments of the present disclosure, based on the foregoing, the connecting member is a positioning pin.

In some embodiments of the present disclosure, based on the foregoing scheme, the tooling table includes a tooling platform, a tooling platform fixing device, and a fixing frame;

the tool platform is installed on the tool platform fixing device, and the tool platform fixing device is connected with the fixing frame.

In some embodiments of the present disclosure, based on the foregoing scheme, the fixture table fixing device is a triangular plate frame having a rib plate structure;

the fixing frame is composed of a rectangular flat plate and a triangular flat plate, the rectangular flat plate is connected with the sliding device, and the triangular flat plate is connected with the tooling table fixing device.

In a second aspect of the embodiments of the present disclosure, there is provided a positioning apparatus, including: the outer surface of the positioning circular tube is matched with the inner surface of the assembling part of the workpiece with the cylindrical assembling part;

the tooling table is connected with the other side of the sealing plate;

and the sealing plate is connected with the tooling platform through the connecting piece.

The welding system that this disclosure provided makes its location accurate at the frock bench through the cooperation with the location pipe through setting up the location pipe at the frock bench, has improved the accuracy of work piece processing, simultaneously, because this location pipe that this disclosure provided is convenient operation at the installation of frock bench dismantles for the assembly of work piece is consuming time fewly, in addition, use the location work piece of location pipe at the frock bench not receive the restriction of work piece appearance, can satisfy the requirement of work piece batch production, has improved the production efficiency of work piece.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure. It is to be understood that the drawings in the following description are merely exemplary of the disclosure, and that other drawings may be derived from those drawings by one of ordinary skill in the art without the exercise of inventive faculty.

FIG. 1 is an assembly schematic of a welding system in an exemplary embodiment of the present disclosure.

Fig. 2 is a schematic view of a positioning circular tube and a sealing plate of a welding system according to an exemplary embodiment of the disclosure.

FIG. 3 is a schematic illustration of a profile of a workpiece of a welding system in an exemplary embodiment of the disclosure.

FIG. 4 is a schematic illustration of a profile of a connector of a welding system in an exemplary embodiment of the disclosure.

FIG. 5 is a partially assembled schematic view of a welding system in an exemplary embodiment of the present disclosure.

Wherein the reference numerals are as follows:

1: a tooling table;

11: a tooling platform;

12: a fixture platform fixing device;

13: a fixed mount;

2: positioning a circular tube;

3: closing the plate;

4: a connecting member;

5: a through hole;

6: and (5) a workpiece.

In the drawings, the same or corresponding reference numerals indicate the same or corresponding parts.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their detailed description will be omitted. Furthermore, the drawings are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale.

Although relative terms, such as "upper" and "lower," may be used in this specification to describe one element of an icon relative to another, these terms are used in this specification for convenience only, e.g., in accordance with the orientation of the examples described in the figures. It will be appreciated that if the device of the icon were turned upside down, the element described as "upper" would become the element "lower". When a structure is "on" another structure, it may mean that the structure is integrally formed with the other structure, or that the structure is "directly" disposed on the other structure, or that the structure is "indirectly" disposed on the other structure via another structure.

The terms "a," "an," "the," "said," and "at least one" are used to indicate the presence of one or more elements/components/parts/etc.; the terms "comprising" and "having" are intended to be inclusive and mean that there may be additional elements/components/etc. other than the listed elements/components/etc.

The embodiment of the present disclosure provides a welding system, and fig. 1 shows an assembly schematic diagram of a welding system in an exemplary embodiment of the present disclosure, and as shown in fig. 1, the welding system in the exemplary embodiment may include a tool table 1, a positioning circular tube 2, a sealing plate 3, a connecting member 4, and a welding robot.

In some embodiments, because a workpiece with a special shape is difficult to be effectively fixed on a tool table, when the workpiece is subjected to welding operation, an assembling portion with a pipe barrel-shaped structure is generally reserved on the workpiece with the special shape. According to the positioning device, the positioning round pipe is matched with the tool table, so that the positioning of the workpiece with the special shape on the tool table becomes accurate.

Wherein, location pipe 2 is the cylindrical body that has the through-hole, and location pipe 2 is used for cooperating with the assembly portion of work piece for the work piece is fixed a position on frock platform 1 through location pipe 2.

The workpiece is a workpiece having a cylindrical fitting portion, which is fitted with the positioning round tube 2. The profile of the workpiece may be any irregular shape.

The outer surface of the positioning round tube 2 is matched with the inner surface of the workpiece assembly part, so that the workpiece can be accurately positioned at the designated position of the tool table 1.

The diameter of the round positioning tube 2 can be different in size, and the outer diameter of the round positioning tube 2 is the same as the inner diameter of the assembly part of the workpiece, so that effective matching between the round positioning tube 2 and the workpiece is guaranteed.

The matching mode of the positioning circular tube 2 and the workpiece can be interference fit, transition fit or clearance fit, in the embodiment of the disclosure, the matching mode of the positioning circular tube 2 and the workpiece is ensured not to cause the workpiece to move or rotate and the like during the workpiece processing, the specific matching mode of the positioning circular tube 2 and the workpiece is determined according to the assembling condition, and the position is not limited.

Further, the internal diameter size of location pipe 2 does not do the injecion, but the internal diameter of location pipe 2 should not be too big, the pipe wall that needs to guarantee location pipe 2 has certain thickness, the pipe wall of location pipe 2 has machining strength, in order to guarantee that the condition such as deformation or fracture can not appear in location pipe 2 in the work piece course of working, and simultaneously, the internal diameter size of location pipe 2 should not be too little yet, otherwise can lead to the wall thickness of location pipe 2 too thick, can occupy great space when the installation of location pipe 2, and can lead to the waste of material.

The height of the positioning round tube 2 is determined by the height of the fitting portion of the workpiece.

In some embodiments, the positioning circular tube 2 may be a cylindrical tube with an outer diameter of 130mm, a wall thickness of 15mm, and a height of 150mm, at this time, the height of the workpiece matching with the positioning circular tube 2 is at least 150mm, and the inner diameter of the workpiece assembling portion needs to be greater than or equal to 130mm, so as to ensure effective fixation of the workpiece on the positioning circular tube 2.

Wherein, shrouding 3 is the circular slab that has certain thickness, and shrouding 3 is used for connecting location pipe 2 and frock platform 1.

The terminal surface parallel and level of one side of shrouding 3 and the one end of location pipe 2 is connected shrouding 3 and location pipe 2 through the welding mode, and the opposite side of shrouding 3 is located the inside of location pipe 2, and one side and the frock platform 1 of 2 looks parallel and levels of shrouding 3 and location pipe are connected.

The diameter of shrouding 3 is the same with the internal diameter of location pipe 2, the thickness of shrouding 3 is by the high decision of location pipe 2, the thickness of shrouding 3 should not be too thin, the thickness of shrouding 3 needs to satisfy the working strength of work piece, but the thickness of shrouding 3 should not be too thick yet, the thickness of shrouding 3 is too thick can lead to the connection insecure of connecting piece 4 on frock platform 1, make shrouding 3 can't connect on frock platform 1 steadily, therefore, the thickness of shrouding 3 both will satisfy the assembly condition with location pipe 2, be convenient for install in one side of location pipe 2, will satisfy the connection condition with frock platform 1 again.

In some specific embodiments, the sealing plate 3 may be a circular plate with a diameter of 100mm and a thickness of 20mm, and the inner diameter of the circular positioning tube 2 needs to be greater than or equal to 100mm, so as to ensure that the sealing plate 3 can be welded to the inner surface of the circular positioning tube 2, thereby achieving the purpose of connecting the sealing plate 3 and the circular positioning tube 2.

Wherein, frock platform 1 is used for the location of work piece, is provided with the through-hole on frock platform 1, can make the work piece realize accurate positioning at frock platform 1 through location pipe 2.

Frock platform 1 is connected with 2 one side of looks parallel and level mutually of shrouding 3 and location pipe, and intensity and smoothness degree on the 1 surface of frock platform need satisfy with shrouding 3's assembly condition.

The tooling platform 1 comprises a tooling platform 11, a tooling platform fixing device 12 and a fixing frame 13. The tooling platform 11 is installed on the tooling platform fixing device 12, and the tooling platform fixing device 12 is connected with the fixing frame 13.

The tool platform 11 is used for positioning a workpiece, the tool platform fixing device 12 is used for fixedly connecting the tool platform 11, and the fixing frame is used for connecting the tool platform fixing device 12.

Preferably, the number of the fixing frames 13 may be 2, and the fixing frames 13 are respectively installed at two ends of the tool platform fixing device 12.

In some specific embodiments, the number of the fixing frames 13 may be 2, and the fixing frames are respectively fixed on two sides of the fixture platform fixing device 12, and in a case that the size of the workpiece is relatively large, the workpiece needs to be moved in position, and the fixing frames 13 may be placed on the sliding rail to move the workpiece left and right or back and forth. However, in some specific embodiments, the number of the fixing frames 13 may be multiple, and in order to effectively fix the tool platform 11 when the area of the tool platform 11 is large, multiple fixing frames 13 may be disposed at two ends of the tool platform 11, and the number of the fixing frames 13 is selected according to the characteristics of the specific tool platform 11, which is not limited in this disclosure.

Wherein, the connecting piece 4 is used for connecting the tooling table 1 and the closing plate 3.

The connecting piece 4 needs to satisfy the required intensity of being connected between the frock platform 1 and the shrouding 3. The length of connecting piece 4 can not the short excessively, and the short excessively can lead to being connected inadequately between frock platform 1 and the shrouding 3, and the length of connecting piece 4 should not be overlength simultaneously, and the overlength can exert an influence to work piece processing. Therefore, the length of the connector 4 is selected according to the connection between the tool table 1 and the sealing plate 3, the machining position of the workpiece, and the like.

Among them, the welding robot described in the present disclosure is a robot in a broad sense having a mechanical welding processing arm, and the welding robot may include the mechanical welding processing arm, a welding operation system controlling the mechanical welding processing arm, a welding operation program of the welding robot, and the like.

Welding robot is used for carrying out the processing operation to the work piece 6 of location on location pipe 2, and specifically, welding robot can carry out the girth joint to work piece 6, can process a plurality of work pieces 6 simultaneously, can realize batch automated production to work piece 6 to welding robot's operation can satisfy girth joint's one shot forming, guarantees the shaping of work piece outward appearance and beautifully spends.

In some embodiments, in the case of circular welding by hand welding, workpieces with a welding diameter of more than 150mm are welded, at least 3 welding joints are usually left, which may affect the appearance of the formed workpieces and may easily generate welding defects. Welding robot can carry out integrated into one piece's annular welding to above-mentioned work piece in this disclosure, and the work piece does not have welding defect, and the shaping is pleasing to the eye.

Further, the operation mode of the welding robot is not limited to the ring welding, but may be other welding operations, such as: linear welding, irregular curve welding and the like, and the specific welding mode is selected according to the requirements of the actual welding workpiece, and the disclosure is not limited.

This is disclosed through be provided with the location pipe on the frock platform for the work piece adds man-hour location accuracy, and it is of high quality to process the work piece, and it is convenient with the installation at the bench dismantlement of frock to fix a position the pipe simultaneously, and is consuming time few, and the positioner that this disclosure provided can be applicable to welding robot mass production work piece, has improved the operating efficiency.

Fig. 2 is a schematic view illustrating the connection between the positioning circular tube and the sealing plate of a welding system according to an exemplary embodiment of the disclosure, and as shown in fig. 2, one end of the positioning circular tube 2 is connected to one side of the sealing plate 3.

The positioning circular tube 2 is a cylindrical tube body with a through hole, and the positioning circular tube 2 is matched with the cylindrical assembly part of the workpiece so as to achieve the accurate positioning effect of the workpiece on the tool table.

Further, the closing plate 3 and the circular positioning tube 2 are connected by welding or riveting, the closing plate 3 and the circular positioning tube 2 can be connected in various ways, and the specific connection way can be selected according to working conditions, which is not limited herein.

Be provided with through-hole 5 on the shrouding 3, through-hole 5 on the shrouding 3 is concentric with location pipe 2, and through-hole 5 on the shrouding 3 is used for installing connecting piece 4, and the size of through-hole 5 on the shrouding 3 is the same with the diameter size of connecting piece 4.

In some specific embodiments, as shown in fig. 2, a circular plate with a diameter of 100mm and a thickness of 20mm may be used as the sealing plate 3, and one end of the positioning circular tube 2 with an outer diameter of 130mm, a wall thickness of 15mm and a height of 150mm is fixed to the sealing plate 3 by welding. Processing and 2 endocentric through-holes 5 of location pipe on shrouding 3, the diameter of through-hole 5 is 15mm, bores the through-hole of diameter 15mm simultaneously on frock platform 1, fixes location pipe 2 and shrouding 3 and frock platform 1 with connecting piece 4, realizes the accurate positioning to work piece 6.

Further, regarding the machined portion, the machining accuracy is equal to or higher than IT 8. However, the machining accuracy may be further adjusted according to actual machining requirements, and is not limited herein.

This openly through set up the through-hole that the diameter is the same at location pipe, shrouding and frock bench, use the connecting piece to fix location pipe and shrouding on the assigned position of frock bench, formed the accurate positioning of work piece at the frock bench for the work piece fixes a position accurately in the course of working, improved the processingquality of work piece.

Fig. 3 is a schematic external view of a workpiece of a welding system in an exemplary embodiment of the present disclosure, and as shown in fig. 3, the workpiece 6 is a workpiece having a cylindrical fitting portion.

In some specific embodiments, one side of the workpiece 6 may be a rectangular flat plate with a circular hole in the middle, and the other side may be a rectangular plate structure with a curled edge on one side with a circular hole in the middle, and the inside of the workpiece has a cylindrical assembling portion, and the cylindrical assembling portion is used for assembling with a positioning circular tube, and the positioning circular tube is positioned on the tool table through the positioning circular tube.

Further, the structure and the shape of the workpiece 6 are determined according to the processing and production requirements, and may be any workpiece with a cylindrical assembling portion in the shape of the shape, which is not limited herein, and fig. 3 is only a reference illustration.

Fig. 4 is a schematic external view of a connecting member of a welding system according to an exemplary embodiment of the disclosure, where the connecting member 4 is a positioning pin, as shown in fig. 4.

The connecting piece 4 is used as a part for connecting the sealing plate 3 and the tool table 1 and plays a role in connection. Meanwhile, the connecting piece 4 can also be used for fixing the sealing plate 3 on the tool table 1, so that the sealing plate 3 cannot move on the tool table 1, and a positioning basis is provided for positioning the subsequent workpiece 6 on the positioning circular tube 2.

Connecting piece 4 is the locating pin, uses the locating pin simultaneously through the through-hole on shrouding 3 and the through-hole on the frock platform 1, reaches the purpose of connecting shrouding 3 and frock platform 1. Meanwhile, the positioning pin has the positioning function, and can position the positioning round tube 2 and the sealing plate 3 at the position of the workpiece 6 on the tool table 1, which needs to be processed.

Further, the connecting member 4 is a positioning pin, which may be a smooth pipe positioning pin with a nut, a smooth pipe positioning pin without a nut, or a screw structure, and the selection of the connecting member 4 may be selected according to conditions such as the processing strength of a specific workpiece and the shape of the workpiece, and is not limited herein.

The positioning circular tube is connected with the tool table through the connecting piece in the welding system, so that the workpiece can be accurately positioned on the tool table, the machining precision of the workpiece is improved, meanwhile, the connecting piece is convenient and quick to detach and install, the consumed time is short, and the working efficiency is improved.

Fig. 5 is a partial assembly schematic view of a welding system in an exemplary embodiment of the disclosure, and as shown in fig. 5, a through hole is formed in the tool table 1, and the through hole in the tool table 1 is used for installing the connecting member 4.

The diameter of the through hole on the tool table 1 is the same as the diameter of the through hole 5 on the sealing plate 3, the through hole on the tool table 1 is arranged on the tool platform 11, the diameter of the through hole on the tool table 1 can be different in size, and the size can be set according to the structure and the size of the connecting piece 4.

The number of the through holes on the tool table 1 may be one or multiple, and when the number of the through holes on the tool table 1 is multiple, the arrangement of the through holes on the tool table 1 may be an array arrangement, and the type and the sequence of the arrangement may be adjusted according to the processing requirement, which is not limited herein.

The tool platform 11 is a rectangular plate-shaped structure having one or more through holes, and the tool platform 11 is a work platform for processing the workpiece 6.

The workpiece 6, the positioning circular tube 2 and the closing plate 3 are mounted on the tool platform 11, optionally, the tool platform 11 can be made of cast iron, but the material selection of the tool platform 11 and the processing conditions of the plate body need to meet the positioning requirements and the assembling strength when the workpiece 6 is processed.

The two ends of the tooling platform 11 are respectively provided with a tooling platform fixing device 12.

The tooling platform fixture 12 is used to mount and fix the tooling platform 11.

The tooling platform fixing device 12 is a triangular plate frame with a rib plate structure, a plurality of groove structures are arranged on a main body plate frame of the tooling platform fixing device 12, the weight of the tooling platform fixing frame 12 can be reduced by the structure, meanwhile, the requirement on assembly strength can be met, and the material cost is saved.

The main body plate frame of the tooling table fixing device 12 is of a triangular structure, and the structure is beneficial for the tooling table 1 to be placed on an assembly station, so that the mounting stability of the tooling table can be improved.

Meanwhile, the rib plates are arranged on the surface vertical plane of the main body plate frame of the tooling platform fixing device 12 and are integrally formed with the main body plate frame, so that the tooling platform fixing device 12 has a more stable structure, and the assembly and the fixation of the tooling platform are facilitated.

The fixing frame 13 is used for connecting the tool platform fixing device 12.

The fixing frame 13 is composed of a rectangular flat plate and a triangular flat plate, the rectangular flat plate and the triangular flat plate are vertically arranged, the rectangular flat plate is connected with the tool table fixing device 12 and used for being connected with the fixing frame 13 and the tool table fixing device 12, the triangular flat plate is connected with the sliding device, and the triangular flat plate is connected to the sliding device in a clamping mode.

The sliding device is used for changing the position of the tool table 1, the sliding device can enable the tool table 1 to move horizontally or back and forth, and can also enable the tool table 1 to rotate, and the specific working condition of the sliding device is determined according to the processing requirement of a workpiece, and is not limited here.

The welding system that this embodiment provided through be provided with the frock platform of constituteing by frock platform, frock platform fixing device and mount in welding system, provides stable processing condition for the work piece is processed on the frock platform for the machining precision of work piece is higher.

As shown in a partial assembly drawing shown in fig. 5, taking a new eight-axle locomotive end assembly hanging seat as an example, according to the fact that the inner diameter of an assembly part of a workpiece 6 is 130mm, the outer diameter is 130(-0.5/0) mm, a sealing plate 3 with the diameter of 100mm and the thickness of 20mm is selected to fix one end of a positioning circular tube 2 in a welding mode, a through hole 5 with the diameter of 15mm concentric with the positioning circular tube 2 is machined in the sealing plate 3, and the positioning circular tube 2, the sealing plate 3 and the through hole 5 form a positioning device. Simultaneously, a through hole with the diameter of 15mm is drilled on the tool platform 11, and the positioning round pipe 2 and the sealing plate 3 are fixed with the tool platform 11 by the connecting piece 4, so that the workpiece 6 can be accurately positioned on the tool platform 1.

The outer wall of the positioning circular tube 2 is matched with the workpiece 6, so that the workpiece can be accurately positioned, the positioning device is easy to detach and move, and the processing and positioning cost of the workpiece is greatly saved.

The present disclosure also provides a positioning device, the positioning device includes: location pipe, shrouding, frock platform and connecting piece. The location pipe, shrouding, frock platform and the connecting piece that contain among the positioner and the welding system that this disclosure provided including location pipe, shrouding, frock platform and connecting piece are the same part, and the effect is the same simultaneously.

The positioning device can accurately position the workpiece on the tool table, improves the machining precision of the workpiece, is easy to install and disassemble, saves time cost, and can meet the requirement of batch production of the workpiece and improve the production efficiency.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

Claims

1. A welding system, comprising:

the tooling table is connected with the other side of the sealing plate;

2. The welding system of claim 1,

the positioning circular tube is a cylindrical tube body with a through hole.

3. The welding system of claim 1,

the sealing plate is in a circular plate shape, and the diameter of the sealing plate is the same as the inner diameter of the positioning circular tube.

4. The welding system of claim 1,

the sealing plate is provided with a through hole, and the through hole in the sealing plate is concentric with the positioning circular tube.

5. The welding system of claim 4,

the through hole on the shrouding is used for installing the connecting piece, the through hole diameter on the shrouding with the diameter of connecting piece is the same.

6. The welding system of claim 1,

the tool table is provided with a plurality of through holes, and the through holes of the tool table are arranged in an array;

7. The welding system of claim 1,

the connecting piece is a positioning pin.

8. The welding system of claim 1,

the tool platform comprises a tool platform, a tool platform fixing device and a fixing frame;

9. The welding system of claim 8,

the fixture table fixing device is a triangular plate frame with a rib plate structure;

the fixing frame is composed of a rectangular flat plate and a triangular flat plate, the triangular flat plate is connected with the sliding device, and the rectangular flat plate is connected with the tooling table fixing device.

10. A positioning device, comprising:

the tooling table is connected with the other side of the sealing plate;