CN109158826B

CN109158826B - Welding chuck

Info

Publication number: CN109158826B
Application number: CN201811395211.4A
Authority: CN
Inventors: 杨勋; 刘明祥; 王晓祥; 赵根东
Original assignee: Wuhan Hengxintai Oil Extraction Equipment Manufacture Co ltd
Current assignee: Wuhan Hengxintai Oil Extraction Equipment Manufacture Co ltd
Priority date: 2018-11-22
Filing date: 2018-11-22
Publication date: 2024-03-22
Anticipated expiration: 2038-11-22
Also published as: CN109158826A

Abstract

The invention relates to the technical field of mechanical welding, in particular to a welding chuck which can meet the welding requirement of high straightness, achieves low-temperature environmental control automatic welding, has good welding quality and stable quality, improves the welding precision, and ensures that the operation comprehensive parameters of a whole motor after welding are consistent with those of a unit motor. The welding arc plate is characterized by comprising an arc-shaped main body support with an opening, one side of the main body support is rotationally connected with a welding arc plate, a welding needle and a welding wire feeder are arranged on the side wall of the welding arc plate, and a locking claw is movably arranged on the other side of the main body support.

Description

Welding chuck

Technical Field

The invention belongs to the technical field of mechanical welding, and particularly relates to a welding chuck.

Background

The submersible induction motor is generally manufactured by embedding windings into a plurality of single-section stators, a plurality of motors which are sequentially arranged along the axial direction are arranged in a motor shell, two adjacent unit motor rotors are fixedly connected through a coaxial connector, and then the shells of the two unit motor rotors are welded together.

The traditional manual welding mode cannot realize continuous welding, meanwhile, the welding quality is unstable due to the influence of human factors, the welding time is long, the heat affected zone of a welded workpiece is wide and deep, and the insulating performance of a motor winding and a cladding point is deadly affected.

Disclosure of Invention

The invention aims to provide a welding chuck which can meet the welding requirement of high straightness, achieves low-temperature environmental control automatic welding, has good welding quality and stable quality, improves the welding precision, and ensures that the overall operation comprehensive parameters of a welded motor are consistent with those of a unit motor.

The technical aim of the invention is realized by the following technical scheme:

the welding chuck comprises an arc-shaped main body support with an opening, a welding arc plate is rotatably connected to one side of the main body support, a welding needle and a welding wire feeder are arranged on the side wall of the welding arc plate, and a locking claw is movably arranged on the other side of the main body support.

Further, the welding arc plate is close to the side wall of the main body support, a sliding strip with a Z-shaped section is fixedly arranged on the side wall of the main body support, the sliding strip is arranged along the circular circumference of the welding arc plate, a sliding groove matched with the sliding strip is formed in the side wall of the main body support, and the sliding strip is slidingly arranged in the sliding groove and can slide into the sliding groove on the other side through an opening of the main body support.

Further, a gear ring is arranged in the welding arc plate along the circumferential direction of the welding arc plate, the radian of the gear ring is identical to that of the sliding strip, a gear matched with the gear ring is arranged in the main body support along the thickness direction of the main body support, and a driving motor for driving the gear to rotate is arranged on the side wall of the main body support.

Further, a supporting plate is fixedly arranged on one side, far away from the main body support, of the welding arc plate, and a guide rod and a reciprocating screw rod are arranged on one side of the supporting plate in parallel along the thickness direction of the welding arc plate; the welding needle is arranged at the end part of a support arm, the guide rod slides and penetrates through one end of the support arm far away from the welding needle, meanwhile, the reciprocating screw rod is in sliding connection with the end part of the support arm, and the reciprocating screw rod is driven to rotate through a first servo motor arranged at one end of the reciprocating screw rod so as to drive the welding needle to axially reciprocate along the reciprocating screw rod.

Further, one end of the support arm, which is close to the welding needle, is provided with a second servo motor, the output end of the second servo motor is provided with a screw rod, the welding needle is in threaded connection with the screw rod through a sliding block, and the second servo motor drives the welding needle to axially move along the screw rod.

Further, blocking pins are respectively arranged on two sides of the opening of the welding arc plate along the thickness direction of the welding arc plate.

Further, the locking claw comprises clamping claws which are respectively arranged at two sides of the opening of the main body bracket in a rotating way, and a pressing block which is arranged at the top of the main body bracket in a vertical sliding way; each clamping jaw's middle part through the round pin axle with main part support rotates to be connected, is located the clamping jaw is close to the outer wall of briquetting one end be equipped with main part support threaded connection's adjusting bolt, one of them clamping jaw runs through its thickness and is equipped with waist type hole, corresponding adjusting bolt slides and runs through waist type hole, and its one end tip that stretches into waist type hole is equipped with the baffle, another adjusting bolt with corresponding clamping jaw outer wall butt, clamping jaw and the top of briquetting is equipped with eccentric cam and drive eccentric cam pivoted handle, the major axis of eccentric cam is located all the time be equipped with the top of the clamping jaw in waist type hole.

Further, each clamping jaw side and each pressing block side are respectively provided with a reset spring for driving the clamping jaw and the pressing block to be far away from each other.

Further, the inner walls of the opposite sides of the two clamping jaws are respectively detachably provided with a gasket.

The beneficial effects of the invention are as follows:

1. during welding, the unit motor to be welded is fixed on the base guide rail, and then the welding needle and the welding wire are driven to circumferentially rotate around the welding line so as to circumferentially weld the welding line. Compared with the prior art that the welding needle is not moved and the object to be welded moves, the welding quality of the welding mode is higher. Because the submersible induction motor is a long-shaft motor welded together by a plurality of unit motors, the coaxiality requirement on two adjacent unit motors is extremely high, and once the axes of the two unit motors deviate from each other, the motor rotation effect of the welding complete machine is greatly influenced during use. The welding needle is designed to move, and the welded object is fixed, so that the straightness of the motor of the adjacent unit after welding can be greatly improved, and the electromagnetic performance is unchanged before and after welding.

2. The invention sets up the locking claw on one side of the welding chuck, another side sets up the welding arc plate, welding needle and send welding wire device etc. to set up on the welding arc plate, in this way, can utilize the locking claw to lock the welding chuck on waiting to weld the unit motor while welding. Compared with manual hand-held welding pins in the prior art, the welding arc plate cannot shake during rotation, the distance between the welding pins and the welding seams is kept consistent, and the welding quality is stable.

3. The circumferential angle of the weld joint to be welded is 360 degrees, the welding needle is firstly rotated between 360 degrees and 390 degrees before welding, a proper initial welding spot is found in the range of more than 30 degrees, and then the welding is performed by slowly rotating. Therefore, in the preliminary rotation process, whether deviation exists between the welding needle and the welding line or not can be checked, so that the accident that the deviation is large during formal welding is avoided, and welding is stopped. Meanwhile, the electric wires for supplying the driving motor, the first servo motor and the second servo motor can be pre-checked through preliminary rotation, whether the lengths of the electric wires are enough or not is checked, meanwhile, the electric wires are wound into a larger circle by the blocking needle, so that the electric wires are prevented from falling on the welding seam in the actual welding process, the cooling of the welding seam is affected firstly, the temperature of the welding seam is higher secondly, and even an electric shock accident occurs when the electric wires are blown. Moreover, because the welding arc plate rotates instead of continuously rotating positively in the welding process, the electric wire wound around the welding arc plate in the rotating process is gradually loosened on the ground, the movement of the welding needle cannot be influenced by tension and the like, the welding needle moves stably, and if the welding arc plate rotates positively, the gravity of the electric wire can generate resistance to the movement of the welding needle, so that the welding effect is influenced.

4. According to the invention, the reciprocating swing of the welding needle is realized through the reciprocating screw rod, so that the fish scale-shaped welding effect can be achieved, and the mechanical property of the welded seam is higher than that of the shell material after welding.

5. The invention uses the argon arc welding host machine, can ensure that the local highest temperature of single welding of the welding line only reaches 320 ℃, thereby not affecting the insulation performance of the winding and the cladding layer in the motor.

6. The eccentric cam and the locking claw are matched with the pressing block, so that the unit motor is locked, the clamping jaw and the pressing block can be simultaneously driven to move simultaneously only by driving the eccentric cam to rotate, and the unit motor is locked, so that the unit motor locking device is simple in structure and convenient to operate. And the gaskets are detachably arranged on the clamping jaw and the pressing block respectively, so that the locking effect can be improved by replacing the gaskets when unit motors with different diameters are operated. On the other hand, the adjusting bolt rotates relative to the main body support, and the rotating angle of the clamping jaw can be adjusted and limited, so that the distance between the two clamping jaws and the rotating angle range of the clamping jaw can be adjusted, and the adjusting bolt is better suitable for unit motors with different diameters.

7. The base guide rail is adjustable, so that the straightness of the unit motor to be welded, which is fixed on the base guide rail, can be preliminarily guaranteed during welding, and a foundation is laid for the final welding effect.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of the overall structure of an apparatus incorporating a welding cartridge of the present invention;

FIG. 2 is a schematic view of a welding chuck, which is mainly used for showing the positional relationship between a locking claw and a main body bracket;

FIG. 3 is a schematic view of a welding chuck, mainly used for showing the positional relationship between a welding arc plate and a main body bracket;

FIG. 4 is a schematic view of the internal part of the welding chuck, mainly for showing the driving mode of the welding arc plate;

FIG. 5 is a schematic diagram of the structure of the locking pawl, primarily for illustrating the manner in which the jaws are driven;

FIG. 6 is a schematic diagram of the locking pawl configuration, primarily for illustrating the manner in which the jaws are driven;

fig. 7 is a schematic view of a part of a clamping jaw, which is mainly used for showing a connection mode of an adjusting bolt and the clamping jaw.

In the figure, 1, a base guide rail; 11. a base station; 12. a bottom plate; 13. a V-shaped supporting block; 14. a pressing plate; 2. welding machine gantry connecting frame; 21. a welding machine host; 3. a welding chuck; 31. a main body bracket; 32. a chute; 33. a gear; 34. a driving motor; 4. a locking claw; 41. a clamping jaw; 411. a waist-shaped hole; 42. a pin shaft; 43. adjusting a bolt; 431. a baffle; 44. briquetting; 45. an eccentric cam; 46. a handle; 47. a return spring; 48. a gasket; 5. welding an arc plate; 51. a slide bar; 52. a gear ring; 53. a blocking needle; 6. a support plate; 61. a guide rod; 62. a reciprocating screw; 63. a first servo motor; 64. a support arm; 65. a welding needle; 7. a second servo motor; 71. a screw; 72. a slide block; 8. a wire feeder; 9. and a unit motor.

Detailed Description

The technical scheme of the present invention will be clearly and completely described in the following in connection with specific embodiments. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

The welding chuck, referring to fig. 1, comprises an adjustable base guide rail 1, a plurality of groups of V-shaped supporting blocks 13 and pressing plates 14 matched with the V-shaped supporting blocks 13 are sequentially arranged on the top surface of the base guide rail 1 along the axial direction of the base guide rail 1, and unit motors 9 to be welded are sequentially placed on the V-shaped supporting blocks 13 and are pressed by the pressing plates 14. The bottom of the base rail 1 is placed on the base 11, and the bottom surface of the base 11 is supported on the bottom plate 12 by bolts. The base guide rail 1 can be tens of meters or even tens of meters long, and can be conveniently lifted to a certain height by placing the base guide rail 1 on the base 11, so that the welding operation is convenient to carry out; simultaneously, the base 11 is placed on the bottom plate 12, and the bottom surface of base 11 passes through bolt and bottom plate 12 butt, and the distance between this bolt can adjust base 11 and the bottom plate 12, and under the assistance of horizon rule, finely adjusts the height of base guide 1, makes whole base guide 1 keep high unanimity to improve the straightness accuracy of the unit motor 9 of placing on base guide 1, can avoid the bolt direct to contact with ground simultaneously, imbeds subaerial, influences the support to base guide 1.

Referring to fig. 1, a movable welding machine gantry frame 2 is erected at one end of a base guide rail 1, a welding chuck 3 is hung under the welding machine gantry frame 2 through a rope, a welding machine host 21 for controlling the welding chuck 3 to work is arranged at one side of the base guide rail 1, the welding machine host 21 is electrically connected with the welding chuck 3 through an electric wire, and the welding machine host 21 used in the embodiment is an argon arc welding host purchased from panasonic, and the specific internal structure and a main control circuit board thereof are not described. The welding chuck 3 is provided with a welding pin 65 and a welding wire feeder 8 (shown in fig. 3) which are matched with the welding machine host 21, and the welding pin and the welding wire feeder are respectively arranged on the side wall of a main body bracket 31, and the main body bracket 31 is hung below the welding machine gantry connecting frame 2 through a rope. The welding machine gantry frame 2 can move along the base rail 1 with the welding chucks 3 to weld adjacent unit motors 9 in different positions.

Referring to fig. 2, the main body bracket 31 has a circular arc shape with a downward opening, and a welding arc plate 5 is rotatably connected to one side of the main body bracket 31. The welding arc plate 5 is close to one side of the main body support 31, the sliding strip 51 with the Z-shaped section is fixedly connected to the circular circumference of the welding arc plate 5, the sliding groove 32 matched with the sliding strip 51 is formed in the side wall of the main body support 31, and the sliding strip 51 is partially slipped and embedded into the sliding groove 32, so that the welding arc plate 5 is connected with the main body support 31 in a rotating mode, and when the welding arc plate 5 rotates along the sliding groove 32 relative to the main body support 31, the sliding strip 51 can slide into the sliding groove 32 on the other side through the opening of the main body support 31, and 390-degree rotation of the sliding strip 51 relative to the main body support 31 is achieved. Further, in the present embodiment, the material used for the sliding strip 51 is tin bronze, and the material itself has a certain lubricity, so that smooth sliding of the sliding strip 51 in the chute 32 can be realized without adding additional lubricant.

Referring to fig. 2 and 4, a gear ring 52 is fixedly arranged in the welding arc plate 5, and the radian of the gear ring 52 is the same as that of the slide bar 51; a gear 33 is provided in the main body holder 31 in the thickness direction of the main body holder 31, and a driving motor 34 for driving the gear 33 to rotate is mounted on a side of the main body holder 31 facing away from the welding arc plate 5. The gear 33 is not in direct contact with the gear ring 52, two pinion gears are respectively meshed with two sides of the gear 33, the two pinion gears are directly meshed with the gear ring 52, and the degree of an included angle between the two pinion gears and the circle center of the gear ring 52 is larger than the opening angle of the gear ring 52. The driving motor 34 works, and the gear ring 52 is driven to rotate by the gear 33 and the pinions on the two sides, so that the welding arc plate 5 is driven to rotate relative to the main body bracket 31, and the peripheral ring of the motor 9 of the unit to be welded is welded. The on/off of the drive motor 34 is controlled by the welder host 21 (identified in fig. 1).

Referring to fig. 3 and 4, a support plate 6 is fixedly connected to a side of the welding arc plate 5, which is far from the main body support 31 and is close to the opening of the welding arc plate 5, and two guide rods 61 and a reciprocating screw 62 are arranged side by side along the thickness direction of the welding arc plate 5 on a side of the support plate 6, wherein the reciprocating screw 62 is driven to rotate by a first servo motor 63 arranged on the side wall of the welding arc plate 5. The welding pin 65 is disposed at the end of an arc-shaped support arm 64, two guide rods 61 are slidably connected with one end of the support arm 64 far away from the welding pin 65, and a reciprocating screw 62 is slidably connected with the end of the support arm 64, which is not shown in the specific structure diagram. The first servo motor 63 is controlled by the welding machine host 21 (marked in fig. 1), and the first servo motor 63 is started to drive the support arm 64 to axially reciprocate along the reciprocating screw rod 62, so that the welding needle 65 reciprocates at the welding seam in the welding process, and the welding effect of the scale patterns is achieved.

Referring to fig. 3, a second servo motor 7 is installed at one end of the arm 64 near the welding pin 65, an output end of the second servo motor 7 is connected with a screw 71, the welding pin 65 is disposed at the bottom of a slider 72, and points to the center direction of the welding arc plate 5. The sliding block 72 is in threaded connection with the screw 71, a guide rod is fixedly arranged on the parallel screw 71, and the guide rod is connected with the sliding block 72 in a sliding and penetrating manner, so that when the screw 71 rotates, the sliding block 72 can axially move along the screw 71. The second servo motor 7 is controlled by the welding machine host 21, the second servo motor 7 is started, the screw 71 rotates, and accordingly the welding needle 65 arranged on the sliding block 72 moves along with the sliding block 72 in the axial direction relative to the screw 71, and when unit motors 9 with different diameters are welded, the distance between the welding needle 65 and a to-be-welded position can be adjusted. Meanwhile, a wire feeder 8 is also provided on the slider 72 to realize the cooperation of the wire and the pin 65, and the wire feeder 8 is electrically connected to the welder main unit 21 (identified in fig. 1) through a wire. Further, at the both sides of the opening of welding arc board 5, along welding arc board 5 thickness direction fixedly connected with fender needle 53 respectively, aim at in the welding process, welding arc board 5 rotates relative main part support 31, and the electric wire winding of work such as drive each motor and welding needle 65 is in welding seam department, and with just welding seam contact that finishes, welding department temperature is higher, influences the electric wire, takes place the incident, and keeps off needle 53 can block the electric wire, avoids its and welding seam contact.

Referring to fig. 2, 5 to 7, a locking claw 4 is movably installed at a side of the main body bracket 31 facing away from the welding arc plate 5, and the locking claw 4 includes clamping claws 41 rotatably connected to both sides of the opening of the main body bracket 31, and a pressing block 44 vertically slidably connected to the top of the main body bracket 31. The middle part of each clamping jaw 41 is respectively connected with the main body bracket 31 in a rotating way through a pin shaft 42 to form a lever-like structure; on the side of each clamping jaw 41 facing away from the opposite side clamping jaw 41, an adjusting bolt 43 is screwed with the main body bracket 31, the adjusting bolt 43 being located above the pin shaft 42. One of the clamping jaws 41 is penetrated and opened with a waist-shaped hole 411 along the thickness direction thereof, the corresponding adjusting bolt 43 slides and penetrates through the waist-shaped hole 411, one end of the adjusting bolt extending into the clamping jaw 41 and pointing to the center of the locking claw 4 is fixedly connected with a circular baffle 431, and the diameter of the baffle 431 is larger than the width of the waist-shaped hole 411 so as to prevent the baffle 431 from sliding out of the waist-shaped hole 411. The other side of the adjusting bolt 43 abuts against the outer wall of the corresponding clamping jaw 41. The main body bracket 31 is provided with a vertical groove, and the pressing block 44 is slidably arranged in the groove and can move up and down. A return spring 47 is connected to the main body bracket 31 above the outer side wall of the clamping jaw 41 and the pressing block 44 which are abutted against the corresponding adjusting bolt 43; the return spring 47 of the outer side wall of the clamping jaw 41 is positioned above the pin shaft 42 and always in a compressed state, and the return spring 47 positioned above the pressing block 44 is always in a stretched state. An eccentric cam 45 is rotatably connected to the main body bracket 31 above the pressing block 44, and a handle 46 for driving the eccentric cam 45 to rotate is fixedly connected to the side wall of the eccentric cam 45.

Referring to fig. 5, the handle 46 is nearly vertical, and at this time, the long axis of the eccentric cam 45 is positioned above the jaw 41 and nearly horizontal, and the jaw 41 and the presser 44 are separated from each other. When it is necessary to clamp the unit motor 9 (identified in fig. 1), the worker preliminarily wraps the locking claw 4 around the outer periphery of the unit motor 9, and thereafter the worker holds the handle 46 by hand and presses down to the right. Referring to fig. 6, the long axis of the eccentric cam 45 is rotated downward, the eccentric cam 45 presses down the end of the jaw 41 provided with the waist-shaped hole while driving the end of the jaw 41 of the other side to be rotated upward, and at this time, the eccentric cam 45 presses down the pressing block 44, the pressing block 44 moves downward, and the locking claw 4 is offset within a minute distance from the unit motor 9. Finally, the jaw 41 with the waist-shaped hole 411 is no longer moved under the restriction of the shutter 431, at which time the long axis of the eccentric cam 45 is located above the contact point with the jaw 41 with the waist-shaped hole 411; the outer wall of the clamping jaw 41 on the other side is abutted with the adjusting bolt 43 to stop rotating, meanwhile, the pressing block 44 stops pressing down, the unit motor 9 is held tightly in the locking claw 4, and accordingly the pressing block 44 and the two clamping jaws 41 jointly fix the unit motor 9. When the locking of the unit motor 9 needs to be released, the driving handle 46 rotates upward, the long axis of the eccentric cam 45 rotates horizontally, the restriction on the two clamping jaws 41 and the pressing block 44 is gradually released, and the clamping jaws 41 and the pressing block 44 are mutually separated under the action of the return spring 47, so that the locking of the unit motor 9 is released. Further, referring to fig. 1 and 2, gaskets 48 are respectively attached to the inner side walls of the opposite sides of each jaw 41 and the side walls of the pressing block 44 or are screw-coupled by bolts, so that the locking effect can be adjusted by replacing the gaskets 48 when operating the unit motors 9 of different diameters.

The working process of the welding device for the multi-section permanent magnet synchronous motor is specifically as follows.

S1: the base rail 1 is adjusted with the aid of a level bar so that the base rail 1 as a whole remains horizontal.

S2: the specific positions of the plurality of V-shaped supporting blocks 13 are adjusted and fixed with the aid of the check rod, so that the position and the center height of each V-shaped supporting block 13 on the top surface of the base guide rail 1 are kept consistent, and the coaxiality of the plurality of unit motors 9 placed on the V-shaped supporting blocks 13 is ensured.

S3: the unit motors 9 to be welded are sequentially placed in the V-shaped grooves of the V-shaped supporting blocks 13, adjacent unit motors 9 are abutted tightly, and the unit motors are fixed on the V-shaped supporting blocks 13 by using the pressing plates 14.

S4: the welding machine gantry connecting frame 2 is moved to the vicinity of the welding seam, and an operator holds the handle 46 and presses down to the right. The long axis of the eccentric cam 45 rotates downward, the eccentric cam 45 presses down the end of the clamping jaw 41 provided with the waist-shaped hole, and simultaneously drives the end of the clamping jaw 41 on the other side to rotate upward, and at this time, the eccentric cam 45 presses down the pressing block 44, the pressing block 44 moves downward, and the locking claw 4 shifts within a small distance relative to the unit motor 9. Finally, the jaw 41 with the waist-shaped hole 411 is no longer moved under the restriction of the shutter 431, at which time the long axis of the eccentric cam 45 is located above the contact point with the jaw 41 with the waist-shaped hole 411; the outer wall of the clamping jaw 41 on the other side is abutted with the adjusting bolt 43 to stop rotating, meanwhile, the pressing block 44 stops pressing down, the unit motor 9 is held tightly in the locking claw 4, and accordingly the pressing block 44 and the two clamping jaws 41 jointly fix the unit motor 9. Ensuring that the clamping point of the locking claw 4 is located at a distance of 10-20mm from the weld joint.

S5: the driving motor 34 is controlled to start through a travel switch of the welding machine host 21, the main body bracket 31 is kept stable, the welding arc plate 5 rotates around the unit motor 9, the rotation angle is 360-390 degrees, the relative positions of the welding needle 65 and the welding seam are checked in the rotating process, and the first servo motor 63 and the second servo motor 7 are controlled to operate at any time through the welding machine host 21 so as to adjust the positions of the welding needle 65, and the vertical distance between the welding needle 65 and the welding seam is 2-3 mm.

S6: the welding machine main unit 21 controls the driving motor 34, the first servo motor 63 and the welding wire feeder 8 to operate, the welding arc plate 5 slowly rotates, and the welding seam circumference is welded. During welding, welding wires are not fed firstly in the first pass, materials to be welded are welded together by using a tungsten electrode, and then the welding wires are fed and swung from the second pass, and one welding line is welded by 3-5 passes.

S7: after the welding is completed, the driving handle 46 is rotated upward, the long axis of the eccentric cam 45 is rotated in the horizontal direction, the restriction on the two clamping jaws 41 and the pressing block 44 is gradually released, and the clamping jaws 41 and the pressing block 44 are separated from each other under the action of the return spring 47, so that the locking of the unit motor 9 is released.

Claims

1. A welding chuck, characterized in that: the welding device comprises an arc-shaped main body support (31) with an opening, wherein one side of the main body support (31) is rotationally connected with a welding arc plate (5), the side wall of the welding arc plate (5) is provided with a welding needle (65) and a welding wire feeder (8), and the other side of the main body support (31) is movably provided with a locking claw (4);

the welding arc plate (5) is close to the side wall of the main body support (31), a sliding strip (51) with a Z-shaped section is fixedly arranged on the side wall of the welding arc plate (5), the sliding strip (51) is arranged along the circular circumference of the welding arc plate (5), a sliding groove (32) matched with the sliding strip (51) is formed in the side wall of the main body support (31), and the sliding strip (51) is slidingly arranged in the sliding groove (32) and can slide into the sliding groove (32) on the other side through an opening of the main body support (31);

a gear ring (52) is arranged in the welding arc plate (5) along the circumferential direction of the welding arc plate, the radian of the gear ring (52) is the same as that of the sliding strip (51), a gear (33) matched with the gear ring (52) is arranged in the main body support (31) along the thickness direction of the main body support (31), and a driving motor (34) for driving the gear (33) to rotate is arranged on the side wall of the main body support (31);

a supporting plate (6) is fixedly arranged on one side, far away from the main body support (31), of the welding arc plate (5), and a guide rod (61) and a reciprocating screw rod (62) are arranged on one side of the supporting plate (6) in parallel along the thickness direction of the welding arc plate (5); the welding needle (65) is arranged at the end part of a support arm (64), the guide rod (61) slides to penetrate through one end of the support arm (64) far away from the welding needle (65), meanwhile, the reciprocating screw (62) is in sliding connection with the end part of the support arm (64), and the reciprocating screw (62) is driven to rotate through a first servo motor (63) arranged at one end of the reciprocating screw so as to drive the welding needle (65) to axially reciprocate along the reciprocating screw (62);

a second servo motor (7) is arranged at one end, close to the welding needle (65), of the support arm (64), a screw (71) is arranged at the output end of the second servo motor (7), the welding needle (65) is in threaded connection with the screw (71) through a sliding block (72), and the second servo motor (7) drives the welding needle (65) to axially move along the screw (71);

the locking claw (4) comprises clamping claws (41) which are respectively arranged at two sides of the opening of the main body bracket (31) in a rotating mode, and a pressing block (44) which is vertically arranged at the top of the main body bracket (31) in a sliding mode; the middle part of each clamping jaw (41) is rotationally connected with the main body support (31) through a pin shaft (42), an adjusting bolt (43) which is in threaded connection with the main body support (31) is arranged on the outer wall of the clamping jaw (41) close to one end of the pressing block (44), a waist-shaped hole (411) is formed in one clamping jaw (41) penetrating through the thickness of the clamping jaw, a baffle (431) is arranged at one end part of the adjusting bolt (43) extending into the waist-shaped hole (411), the other adjusting bolt (43) is abutted against the outer wall of the corresponding clamping jaw (41), an eccentric cam (45) and a handle (46) for driving the eccentric cam (45) to rotate are arranged above the clamping jaw (41), and the long axis of the eccentric cam (45) is always positioned above the clamping jaw (41) provided with the waist-shaped hole (411); and a reset spring (47) for driving the clamping jaw (41) and the pressing block (44) to be mutually separated is respectively arranged on one side of each clamping jaw (41) and one side of each pressing block (44).

2. A welding cartridge as defined in claim 1, wherein: and blocking needles (53) are respectively arranged on two sides of the opening of the welding arc plate (5) along the thickness direction of the welding arc plate (5).

3. A welding cartridge as defined in claim 1, wherein: the inner walls of one side opposite to the two clamping jaws (41) are respectively detachably provided with a gasket (48).