CN216730332U

CN216730332U - Welding tool and welding equipment

Info

Publication number: CN216730332U
Application number: CN202123357879.XU
Authority: CN
Inventors: 王莉颖
Original assignee: Maitong Medical Technology Jiaxing Co ltd
Current assignee: Zhejiang Maitong Intelligent Manufacturing Technology Group Co ltd
Priority date: 2021-12-29
Filing date: 2021-12-29
Publication date: 2022-06-14
Anticipated expiration: 2031-12-29

Abstract

The utility model relates to a welding tool and welding equipment, which comprise a base, a positioning plate, a positioning piece, an installation plate, a chuck and a connecting shaft, wherein the positioning plate is arranged on the base; the positioning plate and the mounting plate are arranged oppositely and respectively fixed on the base; the positioning piece is rotationally connected with the positioning plate; the connecting shaft is rotatably connected with the mounting plate, and one end of the connecting shaft penetrates through the mounting plate to be connected with the chuck; the chuck and the positioning piece are opposite to each other and are respectively coaxial with the connecting shaft. The positioning piece is rotationally connected with the positioning plate to realize the rapid fixation and positioning of the bolt head, and the bolt head can synchronously rotate in the welding process; the fast clamping and positioning of the mandrel are realized through the chuck and the connecting shaft which is rotationally connected with the mounting plate, the mandrel is prevented from sliding out of the bolt head, and the mandrel can synchronously rotate in the welding process; the core shaft and the bolt head can rotate rapidly at the position needing welding, and the welding quality and efficiency are improved.

Description

Welding tool and welding equipment

Technical Field

The utility model relates to the technical field of welding, in particular to a welding tool and welding equipment.

Background

Occluders are typically delivered to the defect site of a patient's heart by a push rod for the treatment of congenital heart disease. The metal substrate of the push rod used in the interventional therapy operation of congenital heart disease is a nickel-titanium inner mandrel and a bolt head with threads, the bolt head is sleeved at the front end of the mandrel, and uniform spot welding (generally three points are needed to be spot welded) is carried out on the circumference of the joint of the mandrel and the bolt head, so that the mandrel and the bolt head are firmly connected together. Because the core shaft is thin and long (the outer diameter is less than 1mm, the length is more than 1m), the bolt head is small in size, and after the head of the core shaft is inserted into the bottom of the bolt head, the head of the core shaft is easy to slip under the action of the gravity of the core shaft, so that the phenomena of welding penetration, infirm welding and the like are caused. In addition, a general welding machine laser head cannot rotate, and three points are difficult to be uniformly welded on the circumference where the mandrel and the bolt head are connected.

In order to realize the welding of the mandrel and the bolt head, the mandrel is inserted into the bottom of the bolt head in the traditional mode, the bolt head is rotated into a rod-shaped die matched with threads, and the bolt head is placed into a rotating disk of a welding machine for rotating welding, but the phenomenon that the mandrel is separated from the bolt head, welding is caused, products are scrapped and the like still exists in the mode.

SUMMERY OF THE UTILITY MODEL

Therefore, it is necessary to provide a welding tool and a welding device for solving the problems of low welding efficiency and poor welding quality of the slender mandrel and the plug.

A welding tool comprises a base, a positioning plate, a positioning piece, an installation plate, a chuck and a connecting shaft;

the positioning plate and the mounting plate are arranged oppositely and fixed on the base respectively;

the positioning piece is rotatably connected with the positioning plate;

the connecting shaft is rotatably connected with the mounting plate, and one end of the connecting shaft penetrates through the mounting plate to be connected with the chuck;

the chuck and the positioning piece are opposite to each other and are respectively coaxial with the connecting shaft.

In one embodiment, the welding tool further includes a first bearing, a fixing hole is formed in the positioning plate, the first bearing is installed in the fixing hole, the first bearing is sleeved on the positioning piece, and the positioning piece is rotatably connected with the positioning plate through the first bearing.

In one embodiment, a first annular groove is formed in the positioning plate, a first slide rail in sliding fit with the first annular groove is arranged on the positioning element, and the positioning element is rotatably connected with the positioning plate through the first slide rail and the first annular groove.

In one embodiment, the welding tool further comprises a second bearing, a through hole is formed in the mounting plate, the second bearing is mounted in the through hole, the second bearing is sleeved on the connecting shaft, and the connecting shaft is rotatably connected with the mounting plate through the second bearing.

In one embodiment, the mounting plate is provided with a through hole, a second annular groove is formed in the inner wall of the through hole, a second sliding rail in sliding fit with the second annular groove is arranged on the connecting shaft, and the connecting shaft is rotatably connected with the mounting plate through the second sliding rail and the second annular groove.

In one embodiment, the welding tool further comprises a limiting column, the limiting column is telescopically arranged in the mounting plate and is perpendicular to the axial direction of the connecting shaft, and a plurality of limiting grooves matched with the limiting column are formed in the outer wall of the connecting shaft in the circumferential direction of the outer wall of the connecting shaft.

In one embodiment, a containing hole is formed in the mounting plate, the limiting column is arranged in the containing hole, one end of the limiting column is elastically matched with the hole wall of the containing hole, and the other end of the limiting column is in butt joint with the shaft section of the connecting shaft, wherein the connecting shaft is provided with the limiting groove.

In one embodiment, the positioning element is provided with a positioning groove, the connecting shaft is provided with a mounting hole extending along the axial direction of the connecting shaft, and the center line of the positioning groove is overlapped with the center line of the mounting hole.

In one embodiment, the welding tool further comprises a guide plate, the guide plate is arranged between the mounting plate and the positioning plate, a guide groove is formed in the guide plate, and the center line of the guide groove coincides with the center lines of the chuck, the positioning piece and the connecting shaft.

In one of them embodiment, the welding frock still include twist grip, twist grip with the other end of connecting axle is connected, twist grip is equipped with the hole of stepping down that extends along its axial direction, the central line in hole of stepping down with the chuck reaches the central line coincidence of setting element is same horizontal line.

The utility model provides a welding equipment, includes welding machine, workstation and right welding frock, welding frock is fixed in the workstation, the soldered connection of welding machine with welding frock's setting element corresponds.

Above-mentioned welding frock and welding equipment, during the use, treat welded one end with the tiehead in the setting element and expose the tiehead, wear to locate the chuck with the dabber, it is tight with the dabber clamp to make the chuck closure, treat welded one end with the dabber and insert the tiehead and treat welded one end, carry out spot welding to tiehead and dabber, it drives chuck and dabber rotation to rotate the connecting axle after the spot welding, drive tiehead and setting element synchronous rotation simultaneously, carry out spot welding to tiehead and another position of dabber, repeat above-mentioned operation, until accomplishing tiehead and the required spot welding quantity of dabber, loosen the chuck, take out the dabber that the welding has the tiehead. The welding tool and the welding equipment realize the rapid fixation and positioning of the bolt head through the positioning piece rotationally connected with the positioning plate, and the bolt head can synchronously rotate in the welding process; the quick clamping and the positioning of the mandrel are realized through the chuck and the connecting shaft which is rotatably connected with the mounting plate, the mandrel is prevented from sliding out of the bolt head, and in the welding process, the mandrel can rotate synchronously, so that the welding quality and efficiency are improved.

Drawings

Fig. 1 is a schematic perspective view of a welding tool according to an embodiment of the present application;

FIG. 2 is a front view of a welding tool according to an embodiment of the present application;

FIG. 3 is a left side view of a welding tool according to an embodiment of the present application;

FIG. 4 is a top view of a welding tool according to an embodiment of the present application;

fig. 5 is an enlarged cross-sectional view of a welding tool according to an embodiment of the present application.

Description of reference numerals:

1. a base; 2. positioning a plate; 3. a guide plate; 31. a guide groove; 4. a positioning member; 5. mounting a plate; 6. a chuck; 7. a connecting shaft; 71. a limiting groove; 72. mounting holes; 8. a limiting post; 9. rotating the handle; 91. a hole of abdication; 10. a first bearing; 11. a second bearing.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the utility model.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, e.g., as being permanently connected, detachably connected, or integral; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "above," and "over" a second feature may be directly on or obliquely above the second feature, or simply mean that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Referring to fig. 1 to 5, an embodiment of the present application provides a welding tool, which includes a positioning plate 2, a positioning element 4, a mounting plate 5, a chuck 6, and a connecting shaft 7. In this embodiment, the welding tool further includes a first bearing 10 and a second bearing 11. The welding tool is used for quickly realizing the positioning and the rotation of the mandrel and the bolt head.

Referring to fig. 1 and 3, the positioning member 4 is rotatably connected to the positioning plate 2. The positioning piece 4 is used for installing the bolt head, and the quick positioning and rotation of the bolt head are realized. In this embodiment, the positioning element 4 is rotatably connected to the positioning plate 2 through the first bearing 10. Specifically, a fixing hole is formed in the positioning plate 2, the first bearing 10 is installed in the fixing hole, and the positioning piece 4 is sleeved with the first bearing 10. Optionally, the positioning element 4 and the positioning plate 2 may also be rotatably connected in other manners, for example, in other embodiments, a first annular groove is formed in the positioning plate 2, a first sliding rail in sliding fit with the first annular groove is arranged on the positioning element 4, and the positioning element 4 is rotatably connected to the positioning plate 2 through the first sliding rail and the first annular groove.

Referring to fig. 1 and 5, the connecting shaft 7 is rotatably connected to the mounting plate 5. In this embodiment, the connecting shaft 7 is rotatably connected to the mounting plate 5 through the second bearing 11. Specifically, a through hole is formed in the mounting plate 5, the second bearing 11 is mounted in the through hole, and the second bearing 11 is sleeved on the connecting shaft 7. Optionally, the connecting shaft 7 and the mounting plate 5 may also be rotatably connected in other manners, for example, in other embodiments, a through hole is formed in the mounting plate 5, a second annular groove is formed in an inner wall of the through hole, a second sliding rail in sliding fit with the second annular groove is formed in the connecting shaft 7, and the connecting shaft 7 is rotatably connected to the mounting plate 5 through the second sliding rail and the second annular groove.

Referring to fig. 1 and 5, one end of the connecting shaft 7 is connected to the chuck 6. The chuck 6 and the connecting shaft 7 are used for installing a mandrel, so that the mandrel can be quickly positioned, fixed and rotated. In particular, the chuck 6 in this embodiment is a drill chuck 6 for clamping and loosening the mandrel. The drill chuck 6 is adopted to realize quick feeding, adjustment and discharging of the mandrel, the operation is convenient, the feeding and discharging time is effectively saved, and the welding efficiency is improved. The structure of the drill chuck 6 can be realized by adopting the prior art, and is not described in detail herein. Alternatively, in other embodiments, the chuck 6 may have other types of structures, such as a structure that allows for quick clamping and unclamping of the mandrel.

During the use, with the tiehead location setting element 4 and expose the tiehead and treat the welded one end, wear to locate chuck 6 with the dabber, make chuck 6 closed press from both sides the dabber tightly, treat the dabber with the dabber and treat the welded one end and insert the tiehead and treat the welded one end, carry out spot welding to tiehead and dabber, rotate connecting axle 7 and drive chuck 6 and dabber rotation after the spot welding is accomplished, drive tiehead and setting element 4 synchronous rotation simultaneously, carry out spot welding to another position of tiehead and dabber, repeat above-mentioned operation, until accomplishing the tiehead and the required spot welding quantity of dabber, loosen chuck 6, take out the dabber that the welding has the tiehead. The welding tool and the welding equipment realize the rapid fixation and positioning of the bolt head through the positioning piece 4 which is rotationally connected with the positioning plate 2, and the bolt head can synchronously rotate in the welding process; through chuck 6 and with the connecting axle 7 of 5 rotation connections of mounting panel realize the quick clamp of dabber tightly with the location, avoid dabber roll-off bolt head, in addition welding process, the dabber can rotate in step, promotes welding quality and efficiency. The quick feeding and discharging and convenient adjustment and fixation of the long and thin core shaft are realized, the quick positioning of the bolt head is realized, and the welding consistency and the product percent of pass are improved.

Further, referring to fig. 5, a limit post 8 is telescopically arranged in the mounting plate 5. The outer wall of the connecting shaft 7 is provided with a plurality of limiting grooves 71 matched with the limiting columns 8 around the circumference of the outer wall. In this embodiment, the connecting shaft 7 is provided with three limiting grooves 71, and in other embodiments, the number of the limiting grooves 71 can be flexibly set according to actual requirements, such as four, two, five, and the like. Specifically, in this embodiment, the limiting grooves 71 are disposed on the shaft section of the connecting shaft 7 extending out of the second bearing 11, and the three limiting grooves 71 are uniformly arranged at intervals. The rotation of the second bearing 11 and the connecting shaft 7 is not influenced, and the matching of the limiting groove 71 and the limiting column 8 is met. The connecting shaft 7 is rotated to realize circumferential welding of the mandrel and the bolt head, and three limiting grooves 71 are arranged on the connecting shaft 7 to realize rapid rotation of 120 degrees each time and uniformly weld three points on the circumference. Compare the tradition and adopt the welding machine that has accurate rotary disk, the rotary disk is rotatory 120 manual input parameter at every turn, the use of equipment is higher to producers' requirement, low in production efficiency, and the welding machine is expensive, the welding frock of this embodiment rotates the rotation that the connecting axle 7 of being connected realized the dabber through with mounting panel 5, rotate the synchronous rotation of the locating piece 4 of being connected through rotating with locating plate 2 and realize the tieing head, and spacing groove 71 and the spacing post 8 cooperation that circumference set up on the connecting axle 7, can realize fast the even spot welding to dabber and tieing head, guarantee welded uniformity, the operation degree of difficulty is low, high efficiency, and is low in cost.

Referring to fig. 5, a containing hole is formed in the inner wall of the through hole, the limiting column 8 is arranged in the containing hole, one end of the limiting column 8 is elastically matched with the hole wall of the containing hole, and the other end of the limiting column 8 is in butt joint with the shaft section of the limiting groove 71, which is arranged on the connecting shaft 7. Optionally, an elastic part is arranged in the accommodating hole, the elastic part is arranged between the limiting column 8 and the bottom wall of the accommodating hole, when the limiting column 8 is not inserted into the limiting groove 71, the elastic part is compressed to enable the limiting column 8 to abut against the outer wall of the connecting shaft 7, when the connecting shaft 7 rotates to the position where the limiting groove 71 corresponds to the limiting column 8, the elastic part releases elastic force to enable the limiting column 8 to extend outwards and then to be inserted into the limiting groove 71, the connecting shaft 7 is limited at the current position, the welding machine welds the position where the bolt head corresponds to the mandrel at the moment, after welding is completed, the connecting shaft 7 is rotated, the limiting column 8 slides out of the current limiting groove 71 until the bolt head and the mandrel are inserted into another limiting groove 71 again, and the welding machine welds the bolt head and the mandrel at another position. The limiting column 8 and the limiting groove 71 are matched, one end of the limiting column is a tip end, the limiting groove 71 is a V-shaped groove with a large outer part and a small inner part, and the limiting column 8 can be conveniently inserted into and slide out of the limiting groove 71. Furthermore, the limiting column 8 is vertically arranged relative to the axial direction of the connecting shaft 7, so that the limiting column 8 can be smoothly inserted into and slid out of the limiting groove 71 of the connecting shaft 7.

Further, referring to fig. 1, 2 and 4, in one embodiment, the welding tool further includes a guide plate 3, the guide plate 3 is disposed between the mounting plate 5 and the positioning plate 2, and a guide groove 31 is disposed on the guide plate 3. The guide plate 3 is disposed at a position closer to the positioning plate 2. The dabber waits that welded one end to arrange in guide way 31, makes dabber and tiehead counterpoint fast accurately on the one hand, makes the dabber wait that welded one end can more smoothly insert in the tiehead horizontally, and on the other hand plays the effect of bearing dabber, further avoids dabber roll-off to tie the head. Optionally, deflector 3 adopts the nylon material, avoids the fish tail dabber.

Further, the positioning member 4 has a positioning groove thereon, and the connecting shaft 7 is provided with a mounting hole 72 extending in the axial direction thereof. The center line of the positioning groove coincides with the center line of the mounting hole 72. The bolt head is provided with a thread, one end of the bolt head is inserted into the positioning groove, and the end to be welded of the bolt head extends out of the positioning groove, so that the bolt head is quickly positioned and fixed, the welding consistency is improved, and the problems of welding penetration, welding deviation, infirm welding and the like are solved. Specifically, the positioning element 4 is cylindrical, and one end of the positioning element 4 close to the guide plate 3 extends out of the first bearing 10, so that the bolt head is positioned and welded conveniently. One end of the mandrel is inserted into the bolt head through the mounting hole 72 of the connecting shaft 7 and the chuck 6.

Further, referring to fig. 1, 2 and 4, in one embodiment, the welding tool further includes a rotating handle 9, the rotating handle 9 is connected to the other end of the connecting shaft 7, and the rotating handle 9 is provided with a yielding hole 91 extending along the axial direction of the rotating handle 9. And operating the rotating handle 9 to drive the connecting shaft 7, the chuck 6 and the mandrel to rotate, and simultaneously driving the bolt head connected with the mandrel and the positioning piece 4 to rotate, thereby realizing the switching of the welding positions of the bolt head and the mandrel. The center lines of the abdicating hole 91, the mounting hole 72, the chuck 6, the guide groove 31 and the positioning piece 4 are coincided to be the same horizontal line, so that the core shaft penetrating through the abdicating hole 91, the mounting hole 72, the chuck 6 and the guide groove 31 can be accurately aligned with the bolt head in the positioning piece 4, and the welding quality is ensured.

Further, the rotating handle 9 and the chuck 6 are respectively arranged at two sides of the mounting plate 5; keeping the stress balance at the two sides of the connecting shaft 7; the mandrel passes through the abdicating hole 91 of the rotating handle 9, enters the mounting hole 72 of the connecting shaft 7 and then extends out of the chuck 6, and the rotating handle 9 supports and limits the rear end of the mandrel. The rotary handle 9 is cylindrical. In other embodiments, the rotating handle 9 may not be provided, the connecting shaft 7 may be provided longer than the mounting plate 5, and the connecting shaft 7 may be rotated by operating a portion of the connecting shaft 7 extending out of the mounting plate 5.

Further, in one embodiment, the welding tool further includes a base 1, and the positioning plate 2, the guide plate 3 and the mounting plate 5 are sequentially fixed on the base 1 at intervals. Through base 1, make the relative position of locating plate 2, deflector 3 and mounting panel 5 keep invariable, realize tieing head and dabber ground quick positioning, improve the welding uniformity, whole frock can carry out fixed mounting through base 1 and laser-beam welding machine's workstation. In other embodiments, the positioning plate 2, the guide plate 3, and the mounting plate 5 may be directly fixed to the worktable of the laser welding machine without separately providing the base 1, and the worktable of the laser welding machine may be used as the base 1 for keeping the positions of the positioning plate 2, the guide plate 3, and the mounting plate 5 relatively fixed.

An embodiment of the application still provides a welding equipment, including welding machine, workstation and above-mentioned arbitrary embodiment the welding frock, the welding frock is fixed in the workstation, the soldered connection of welding machine can with the setting element 4 of welding frock corresponds.

The specific use method is as follows:

1. the welding tool and the workbench of the laser welding machine are fixedly arranged through the base 1.

2. The threaded end of the bolt head is inserted into the bottom of the positioning piece 4, and the elastic shifting ring on the chuck 6 is rotated to open the chuck 6.

3. The mandrel is inserted into the abdicating hole 91 of the rotating handle 9, the mandrel is inserted into the bottom of the hole of the bolt head through the mounting hole 72 of the connecting shaft 7, the chuck 6 and the guide groove 31 on the guide plate 3, and the elastic shifting ring on the chuck 6 is rotated to close the chuck 6 and clamp the mandrel.

4. The rotating handle 9 is rotated clockwise or counterclockwise, so that the limiting column 8 is in any limiting groove 71, and the first point is welded by laser.

5. The rotating handle 9 is rotated clockwise or counterclockwise to make the spacing column 8 enter the next spacing groove 71, and the second point is laser welded.

6. The same operation as in 5 above is performed to complete the welding of the third point.

7. And rotating a loose and tight shifting ring on the chuck 6 to open the chuck 6, and drawing out the welded mandrel from the hole of the rotating handle 9.

The welding equipment utilizes the welding tool in any embodiment, the bolt head is quickly fixed and positioned through the positioning piece 4 which is rotatably connected with the positioning plate 2, and the bolt head can synchronously rotate in the welding process; the fast clamping and positioning of the mandrel are realized through the chuck 6 and the connecting shaft 7 which is rotationally connected with the mounting plate 5, the mandrel is prevented from sliding out of the bolt head, and the mandrel can synchronously rotate in the welding process; the limiting groove 71 of the connecting shaft 7 is matched with the limiting column 8, so that the mandrel and the bolt head can be quickly and accurately positioned to the position to be welded, the welding consistency is ensured, and the welding quality and efficiency are improved. The core shaft and the bolt head of the push rod can be rapidly clamped and fixed, the problems that the core shaft is inserted into the bolt head to be separated, a conventional welding machine cannot perform rotary welding, data needs to be manually input in rotation and the like are solved, and the cost of welding equipment is saved.

The welding equipment and the welding tool can be used for welding a core shaft and a bolt head of a push rod of a conveying device, and can also be suitable for other occasions where workpieces need to be rotated for welding.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A welding tool is characterized by comprising a base, a positioning plate, a positioning piece, a mounting plate, a chuck and a connecting shaft;

the positioning piece is rotatably connected with the positioning plate;

2. The welding tool of claim 1, further comprising a first bearing, wherein the positioning plate is provided with a fixing hole, the first bearing is mounted in the fixing hole, the first bearing is sleeved on the positioning element, and the positioning element is rotatably connected with the positioning plate through the first bearing.

3. The welding tool according to claim 1, wherein a first annular groove is formed in the positioning plate, a first slide rail in sliding fit with the first annular groove is arranged on the positioning member, and the positioning member is rotatably connected with the positioning plate through the first slide rail and the first annular groove.

4. The welding tool of claim 1, further comprising a second bearing, wherein a through hole is formed in the mounting plate, the second bearing is mounted in the through hole, the second bearing is sleeved on the connecting shaft, and the connecting shaft is rotatably connected with the mounting plate through the second bearing.

5. The welding tool according to claim 1, wherein a through hole is formed in the mounting plate, a second annular groove is formed in the inner wall of the through hole, a second sliding rail in sliding fit with the second annular groove is arranged on the connecting shaft, and the connecting shaft is rotatably connected with the mounting plate through the second sliding rail and the second annular groove.

6. The welding tool according to any one of claims 1 to 5, further comprising a limiting post, wherein the limiting post is telescopically arranged in the mounting plate and is vertically arranged relative to the axial direction of the connecting shaft, and a plurality of limiting grooves matched with the limiting post are formed in the outer wall of the connecting shaft in the circumferential direction of the connecting shaft.

7. The welding tool according to claim 6, wherein a receiving hole is formed in the mounting plate, the limiting column is arranged in the receiving hole, one end of the limiting column is in elastic fit with the hole wall of the receiving hole, and the other end of the limiting column is in butt fit with a shaft section of the connecting shaft, which is provided with the limiting groove.

8. The welding tooling of any one of claims 1 to 5, wherein the positioning member is provided with a positioning groove, the connecting shaft is provided with a mounting hole extending along an axial direction of the connecting shaft, and a center line of the positioning groove coincides with a center line of the mounting hole.

9. The welding tool according to any one of claims 1 to 5, further comprising a guide plate, wherein the guide plate is arranged between the mounting plate and the positioning plate, a guide groove is formed in the guide plate, and the center line of the guide groove coincides with the center lines of the chuck, the positioning piece and the connecting shaft.

10. The welding frock of any one of claims 1-5, further comprising a twist grip, the twist grip is connected with the other end of connecting axle, the twist grip is equipped with the hole of stepping down that extends along its axial direction, the central line in the hole of stepping down with the chuck reaches the central line coincidence of setting element is same horizontal line.

11. A welding device is characterized by comprising a welding machine, a workbench and the welding tool according to any one of claims 1 to 10, wherein the welding tool is fixed on the workbench, and a welding head of the welding machine corresponds to a positioning piece of the welding tool.