CN113681185A

CN113681185A - A welding equipment for new energy automobile production

Info

Publication number: CN113681185A
Application number: CN202110938799.9A
Authority: CN
Inventors: 胡文凯
Original assignee: Huangshan Kaixin Technology Consulting Co ltd
Current assignee: Huangshan Kaixin Technology Consulting Co ltd
Priority date: 2021-08-16
Filing date: 2021-08-16
Publication date: 2021-11-23

Abstract

The invention belongs to the field of new energy automobile production, particularly relates to structural improvement of welding equipment for new energy automobile production, and particularly provides welding equipment for new energy automobile production.

Description

A welding equipment for new energy automobile production

Technical Field

The invention belongs to the field of new energy automobile production, and particularly relates to structural improvement of welding equipment for new energy automobile production.

Background

At present, new energy automobiles are in a starting stage in China, various new energy automobiles are continuously pushed out to be new in order to meet market demands, but for automobile manufacturers, a whole new energy automobile production line is redesigned, a large amount of manpower and material resources need to be input, and a large amount of capital is consumed in a previous research and development stage of the new energy automobiles, so that for the purposes of saving cost and quickly realizing profit, a method for transforming an old line is often adopted for the production of the new energy automobiles, flexible transformation is made on the old production line so as to quickly adapt to the models of the new energy automobiles, and quick profit increase is realized.

When a new energy automobile in the prior art is in a welding process, a ground welding mode, also called fixed welding, is often adopted for repair welding spots of non-forming welding, a welding gun is installed on the ground through an upright post during welding, then grippers are installed on six shafts of a robot, the grippers clamp a car, and then the robot moves the car to weld on the welding gun.

However, the stand column for installing the welding gun is a fixed position in the prior art, the height cannot be adjusted, the posture dead zone and the arm extension of the robot are limited, once the production of the vehicle type is switched, the position and the height of the stand column need to be adjusted, the robot welding posture requirement of the vehicle piece of the new vehicle type is matched, the robot cannot reach the posture required by welding, the stand column in the prior art is often fixed on the ground through chemical bolts or expansion bolts, the position is disassembled and adjusted very trouble, the new vehicle type of the new energy vehicle is rapidly switched and the old line is transformed very disadvantageously, the production cycle of the old vehicle type is delayed, and the production of the new vehicle type is delayed.

Disclosure of Invention

The invention aims to provide welding equipment which is convenient for fast switching of new energy automobile models and is suitable for new energy automobile production of different automobile parts, and in order to achieve the aim, the technical scheme adopted by the invention is as follows:

the utility model provides an automobile welding equipment, includes the stand, the stand top is provided with welder with sliding from top to bottom, the stand bottom sets up on a slide, slide slidable ground sets up on a base, the slide passes through drive assembly to be connected the base, drive assembly passes through adjusting part to be connected welder, drive assembly is used for the drive the slide slides to change the distance between welder and the robot, adjusting part is used for adjusting welder's height.

Furthermore, a notch is formed in a fence beside the welding gun, the base extends out of the notch, the notch is formed in a moving path of the welding gun, and the notch is used for sliding out of the welding gun.

Furthermore, the driving assembly comprises a driving device installed on the sliding plate, an output end of the driving device is connected with a connecting shaft, the connecting shaft is rotatably connected with the bottom of the sliding plate and is horizontally arranged, the driving device is used for driving the connecting shaft to rotate, two ends of the connecting shaft are connected with the base through rolling mechanisms, the base is provided with a groove with an upward opening, the connecting shaft and the rolling mechanisms are both arranged in the groove, and the rolling mechanisms are used for rolling to slide the sliding plate;

the connecting shaft is provided with a transition mechanism, and the transition mechanism is connected with the output end of the driving device and the adjusting component.

Furthermore, the rolling mechanism comprises a gear fixedly connected with the end part of the connecting shaft, a rack meshed with the gear is arranged in the groove, and the connecting shaft is perpendicular to the rack.

Furthermore, the bottom of the sliding plate is slidably connected with the top end face of the groove through a sliding rail.

Further, the driving device is a motor.

Furthermore, the transition mechanism comprises a driving bevel gear and two driven bevel gears fixedly arranged on the connecting shaft, the output end of the driving device is fixedly connected with the driving bevel gear, the driving bevel gear is meshed with one of the driven bevel gears, the other driven bevel gear is meshed with a transition bevel gear, the transition bevel gear is connected with the adjusting component, and the transition bevel gear is used for driving the adjusting component to rotate so as to adjust the height of the welding gun.

Furthermore, the adjusting assembly comprises a slide rod, a slide cavity with an upward opening is formed in the top of the upright post, the lower end of the slide rod is slidably arranged in the slide cavity, the welding gun is mounted at the top of the slide rod, the slide rod is in threaded connection with a vertically arranged screw rod, an installation cavity with a downward opening is formed in the bottom of the upright post, the bottom of the screw rod penetrates through the bottom of the slide cavity and is arranged in the installation cavity, and the screw rod is rotatably connected with the upright post;

the transmission shaft is fixedly connected with the bottom of the transition bevel gear, the top of the transition bevel gear penetrates through the sliding plate and is arranged in the installation cavity, the transmission shaft is rotatably connected with the sliding plate, and a connecting mechanism is further arranged in the installation cavity and is used for connecting the transmission shaft with the screw.

Furthermore, the connecting mechanism comprises a connecting sleeve and two electromagnets, the connecting sleeve is sleeved on the transmission shaft through a sliding key in a vertically sliding manner, the two electromagnets are respectively and fixedly arranged on the top of the mounting cavity and the sliding plate, the connecting sleeve is arranged between the two electromagnets, and the electromagnets are used for adsorbing the connecting sleeve;

the top end face of the connecting sleeve is provided with a first limiting block, the side face of the screw rod is provided with a second limiting block, a gap is reserved between the bottom of the second limiting block and the top of the first limiting block, and when the electromagnet at the top of the mounting cavity adsorbs the connecting sleeve, the second limiting block is located on a rotating path of the first limiting block.

Further, the slide bar is provided with a cavity with a downward opening, a fixing block is fixedly arranged in the cavity, the fixing block is provided with a threaded hole, and the screw rod is connected with the threaded hole through threads.

The invention has the following beneficial effects: through the gliding in-process of drive assembly drive slide on the base, the distance between welder and the robot can change, and can also adjust welder's height through adjusting part, and then when producing not equidimension, specification and kind car spare, can make welder's spatial position adaptation machine's gesture demand, the quick switch-over of new energy automobile new automobile type of being convenient for has been reached, and the beneficial effect of the different car spare of adaptation, and welder and slide can follow the roll-off in the rail, still be convenient for change the electrode cap, simultaneously at the welded in-process of robot, according to the required gesture demand of solder joint, adjust welder's position and height in real time, can satisfy the welding gesture demand of special-shaped workpiece.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the connection between the welding gun and the base;

FIG. 3 is a schematic view of the connection between the driving assembly and the adjusting assembly;

FIG. 4 is an enlarged view of the point A in FIG. 3;

FIG. 5 is a schematic view of the welding gun sliding out of the fence;

FIG. 6 is a schematic view of a notch.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to fig. 1 to 6 in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. Unless otherwise specified, the technical means used in the examples are conventional means well known to those skilled in the art.

In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience of description of the present invention, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

The utility model provides an automobile welding equipment, includes the stand 8 of vertical setting, 8 tops of stand are provided with welder 2 with sliding from top to bottom, 8 bottoms of stand set up on a slide 7, slide 7 slidable ground sets up on a base 5, slide 7 passes through drive assembly to be connected base 5, drive assembly passes through adjusting part to be connected welder 2, drive assembly is used for the drive slide 7 slides to change the distance between welder 2 and the robot 1, adjusting part is used for adjusting welder 2's height.

As shown in fig. 1, a car, a welding gun 2 and a robot 1 are all the prior art, wherein the welding gun 2 can be a C-shaped welding gun in the figure, a welding opening faces the robot 1, and can also be an X-shaped welding gun, the robot 1 is an industrial robot, the car is a new energy automobile body-in-white part in the prior art, the welding gun 2 is arranged on the ground through an upright post 8 and a base 5, namely, a structure of floor welding in the prior art is formed, and six tool ends of the robot 1 are connected with the car through a gripper during production and move the car onto the welding gun 2 for welding.

The sliding direction of slide 7 is the direction towards or keeping away from robot 1, drive assembly drive slide 7 gliding in-process on base 5, the distance between welder 2 and robot 1 can change, and can also adjust welder 2's height through adjusting part, and then when the car spare of production equidimension not, specification and motorcycle type, can make welder 2's spatial position adaptation machine 1's gesture demand, especially when new energy automobile switches over motorcycle type production, can quick adjustment welder 2's position, be convenient for the quick switching of new energy automobile new automobile type, and the different car spare of adaptation.

Further, a notch 4 is formed in a fence 3 beside the welding gun 2, the base 5 extends out of the notch 4, the notch 4 is formed in a moving path of the welding gun 2, and the notch 4 is used for sliding out of the welding gun 2.

As shown in fig. 5 and 6, in actual construction, the working area of the robot 1 must be enclosed by the fence 3, so as to prevent outsiders from entering and eliminate potential safety hazards, one end of the base 5, which is far away from the robot 1, extends out of the notch 4, and then the welding gun 2 and the sliding plate 7 can be arranged on the inner side of the fence 3, namely the robot 1 slides out in the working interval, in the concrete implementation, because the electrode cap is a consumable, after the welding gun 2 works for a period of time and the electrode cap needs to be replaced, the welding gun 2 slides out from the notch 4, the electrode cap on the welding gun 2 can be replaced, because the welding gun 2 is not in the working area of the robot 1, therefore, various electrical equipment in the fence 3 does not need to be stopped, the process of restarting and debugging the equipment after the stop is avoided, and the robot 1 does not need to return to the HOME position, so the technical scheme also has the beneficial effect of facilitating the replacement of the electrode cap.

Specifically, the notch 4 is matched with the welding gun 2, the sliding plate 7 and the upright post 8, a space which just passes through the welding gun 2 is provided, the welding gun 2 can still pass through the notch when being at the highest position, the width of the notch 4 is between 30 cm and 40 cm, and other people can be prevented from entering the inner side of the fence 3 from the notch 4.

When the electrode cap is replaced by the welding gun 2 for the floor welding in the prior art, personnel are required to enter a working area inside the rail 3, the electrode cap is replaced by the cap replacing equipment, the robot 1 and various kinds of equipment must be stopped to ensure safety, in addition, the robot 1 must return to the HOME position in order to conveniently restart, the equipment after the stop is restarted and needs to be debugged to the initial state again, so in the process of replacing the electrode cap, the production time of a long time can be occupied, the beat of the whole vehicle is very unfavorable, particularly for a new energy vehicle, the early capital investment is large, and the beat must be compressed to realize the rapid increase of profits.

For the scheme that prior art adopted, this technical scheme changes its position through sliding welder 2, and the 1 all kinds of motorcycle types of the 1 adaptation of robot of not only being convenient for can also be with welder 2 roll-off rail 3, under the condition that robot 1 and equipment do not shut down, quick replacement welder 2's electrode cap, very big compression the beat, improved production efficiency.

Further, the driving assembly comprises a driving device installed on the sliding plate 7, an output end of the driving device is connected with a connecting shaft 11, the connecting shaft 11 is rotatably connected with the bottom of the sliding plate 7 and is horizontally arranged, the driving device is used for driving the connecting shaft 11 to rotate, two ends of the connecting shaft 11 are connected with the base 5 through rolling mechanisms, the base 5 is provided with a groove with an upward opening, the connecting shaft 11 and the rolling mechanisms are arranged in the groove, and the rolling mechanisms are used for rolling to slide the sliding plate 7;

the connecting shaft 11 is provided with a transition mechanism, and the transition mechanism is connected with the output end of the driving device and the adjusting component.

Further, the rolling mechanism comprises a gear 12 fixedly connected with the end portion of the connecting shaft 11, a rack 13 meshed with the gear 12 is arranged in the groove, and the connecting shaft 11 is perpendicular to the rack 13.

The connecting shaft 11 is horizontally arranged and is concentric with the gears 12 at the two ends of the connecting shaft, the rack 13 is fixedly arranged at the bottom of the groove and is parallel to the extending direction of the base 5, when the driving device drives the connecting shaft 11 to rotate along the axis of the connecting shaft, the gears 12 roll on the rack 13, the sliding plate 7 can slide, and the matching of the gears 12 and the rack 13 has the function of accurate adjustment.

Further, the bottom of the sliding plate 7 is slidably connected with the top end surface of the groove through a sliding rail 6.

Slide rail 6 is prior art, and two terminal surfaces at recess top all are provided with slide rail 6.

Further, the driving device is a motor 10, the motor 10 is mounted on the sliding plate 7, and a rotating shaft of the motor passes through the sliding plate 7 and is arranged in the groove.

Further, the transition mechanism comprises a driving bevel gear 16 and two driven bevel gears 15 fixedly arranged on the connecting shaft 11, the output end of the driving device is fixedly connected with the driving bevel gear 16, the driving bevel gear 16 is meshed with one of the driven bevel gears 15, the other driven bevel gear 15 is meshed with a transition bevel gear 17, the transition bevel gear 17 is connected with the adjusting component, and the transition bevel gear 17 is used for driving the adjusting component to rotate so as to adjust the height of the welding gun 2.

As shown in fig. 3, the axes of the drive bevel gear 16 and the transition bevel gear 17 are both vertical, the driven bevel gear 15 is concentric with the connecting shaft 11, and the connecting shaft 11 passes through the two driven bevel gears 15.

Specifically, two connecting blocks 14 are fixedly arranged at the bottom of the sliding plate 7, the two connecting blocks 14 are arranged side by side, and the connecting shaft 11 penetrates through the two connecting blocks 14 and rotatably connects the two connecting blocks 14.

Furthermore, the adjusting assembly comprises a slide rod 9, a slide cavity with an upward opening is formed in the top of the upright post 8, the lower end of the slide rod 9 is slidably arranged in the slide cavity, the welding gun 2 is mounted at the top of the slide rod 9, the slide rod 9 is in threaded connection with a vertically arranged screw rod 19, an installation cavity 25 with a downward opening is formed in the bottom of the upright post 8, the bottom of the screw rod 19 penetrates through the bottom of the slide cavity and is arranged in the installation cavity 25, and the screw rod 19 is rotatably connected with the upright post 8;

the transmission shaft 20 is fixedly connected with the bottom of the transition bevel gear 17, the top of the transmission shaft 20 penetrates through the sliding plate 7 and is arranged in the installation cavity 25, the transmission shaft 20 is rotatably connected with the sliding plate 7, and a connecting mechanism is further arranged in the installation cavity 25 and is used for connecting the transmission shaft 20 and the screw rod 19.

The sliding direction of the slide rod 9 is up and down sliding, the top of the slide rod is connected with the bottom of the welding gun 2 through a screw, the screw rod 19 penetrates through the part between the sliding cavity and the mounting cavity 25, when the transmission shaft 20 drives the screw rod 19 to rotate through the connecting mechanism, the slide rod 9 slides up and down, the height of the welding gun 2 is changed, and in the process of adjusting the height of the welding gun 2, the sliding plate 7 and the welding gun 2 are in a moving state.

Specifically, through the connection of the driven bevel gear 15, the steering of the transition bevel gear 17 and the steering of the driving bevel gear 16 are always in the same direction, so that the steering of the motor 10 is the same as the rotation of the transmission shaft 20, and in the process that the screw 19 drives the slide rod 9 to move downwards, the welding gun 2 moves towards the direction far away from the robot 1, so that when the height of the welding gun 2 is adjusted, the height of the welding gun 2 is reduced, the welding gun 2 is far away from the robot 1, and the height of the welding gun 2 is increased, and the welding gun 2 is close to the robot 1.

In actual production, the farther and lower the welding gun 2 is from the robot 1, or the closer and higher the welding gun 2 is from the robot 1, the easier it is to meet the welding attitude requirements of most workpieces, especially for some special-shaped workpieces such as wheel hub covers, which have welding points arranged in three directions of a vehicle body coordinate system, a single welding gun position is difficult to meet the attitude requirements of the robot 1 when all the welding points are welded, and due to the constraint of two, three and five axes of the robot 1, such special-shaped workpieces are difficult to avoid the existence of welding points which can not be welded by the robot 1.

According to the technical scheme, the position and the height of the welding gun 2 can be adjusted in real time according to the required posture requirement of a welding spot in the welding process of the robot 1 through the sliding welding gun 2, the farther the welding gun 2 is, the lower the height of the welding gun is, the closer the welding gun 2 is, the higher the height of the welding gun is, the convenience is brought to the real-time adjustment of the position of the welding gun 2 according to the welding spot to adapt to the posture of the robot 1, and the welding requirement of special-shaped workpieces is met.

Further, the connecting mechanism comprises a connecting sleeve 24 and two electromagnets 21, the connecting sleeve 24 is sleeved on the transmission shaft 20 through a sliding key in a vertically sliding manner, the two electromagnets 21 are respectively and fixedly arranged on the top of the mounting cavity 25 and the sliding plate 7, the connecting sleeve 24 is arranged between the two electromagnets 21, and the electromagnets 21 are used for adsorbing the connecting sleeve 24;

the top end face of the connecting sleeve 24 is provided with a first limiting block 23, the side face of the screw rod 19 is provided with a second limiting block 22, a gap is reserved between the bottom of the second limiting block 22 and the top of the first limiting block 23, and when the connecting sleeve 24 is adsorbed by the electromagnet 21 at the top of the mounting cavity 25, the second limiting block 22 is located on the rotating path of the first limiting block 23.

As shown in fig. 4, the electromagnet 21 is a prior art and has an annular structure, the transmission shaft 20 passes through the electromagnet 21 below, the screw rod 19 passes through the electromagnet 21 above, a wire hole for leading out an electric wire of the electromagnet 21 is formed in the side surface of the upright post 8, the connecting sleeve 24 is made of metal, a plurality of blind holes for reducing weight are formed in the side surface of the upright post, the connecting manner of the sliding key between the sliding key and the transmission shaft 20 is the prior art, the sliding key not only enables the connecting sleeve 24 to slide up and down, but also has circumferential constraint on the connecting sleeve 24, and the connecting sleeve 24 rotates along with the transmission shaft 20.

The connecting sleeve 24 is in an initial state at this time, the second limiting block 22 is not in contact with the first limiting block 23, a gap is formed between the upper part and the lower part, the two electromagnets 21 are powered off, the height of the welding gun 2 is a fixed height at this time, when the height of the welding gun 2 needs to be adjusted, the electromagnet 21 above is powered on to adsorb the first limiting block 23 to move upwards, and the connecting sleeve 24 is in a rotating state, so that the first limiting block 23 rises to the position with the same height as the second limiting block 22, and in the circumferential direction of the screw rod 19 along the second limiting block 22, the first limiting block 23 impacts the second limiting block 22 in the rotating process of the connecting sleeve 24, so that the second limiting block 22 rotates along with the second limiting block, the height of the welding gun 2 is changed, after the height adjustment is completed, the electromagnet 21 below adsorbs the connecting sleeve 24 to slide downwards, the electromagnet 21 above is powered off, and the first limiting block 23 is separated from the second limiting block 22, the height of the welding torch 2 is fixed.

Further, the slide rod 9 is provided with a cavity with a downward opening, a fixed block 18 is fixedly arranged in the cavity, the fixed block 18 is provided with a threaded hole, and the screw rod 19 is connected with the threaded hole through threads.

Specifically, the cavity provides a stroke of up-and-down movement for the screw rod 19, the fixed block 18 enables the slide rod 9 to be stressed stably, the fixed block 18 is arranged in the middle of the cavity of the slide rod 9, and the screw rod 19 extends out of the fixed block 18 from the threaded hole upwards.

The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various changes, modifications, alterations, and substitutions which may be made by those skilled in the art without departing from the spirit of the present invention shall fall within the protection scope defined by the claims of the present invention.

Claims

1. An automobile welding equipment, includes stand (8), its characterized in that: but stand (8) top is provided with welder (2) with sliding from top to bottom, stand (8) bottom sets up on a slide (7), slide (7) slidable sets up on a base (5), slide (7) are connected through drive assembly base (5), drive assembly passes through adjusting part and connects welder (2), drive assembly is used for the drive slide (7) slide to change the distance between welder (2) and robot (1), adjusting part is used for adjusting the height of welder (2).

2. The automotive welding apparatus of claim 1, wherein: fence (3) on one side of welder (2) are provided with breach (4), base (5) are followed stretch out in breach (4), breach (4) set up on welder (2)'s the moving path, breach (4) are used for welder (2) roll-off.

3. The automotive welding apparatus of claim 1, wherein: the driving assembly comprises a driving device arranged on the sliding plate (7), the output end of the driving device is connected with a connecting shaft (11), the connecting shaft (11) is rotatably connected with the bottom of the sliding plate (7) and is horizontally arranged, the driving device is used for driving the connecting shaft (11) to rotate, two ends of the connecting shaft (11) are connected with the base (5) through rolling mechanisms, the base (5) is provided with a groove with an upward opening, the connecting shaft (11) and the rolling mechanisms are arranged in the groove, and the rolling mechanisms are used for rolling to slide the sliding plate (7);

the connecting shaft (11) is provided with a transition mechanism, and the transition mechanism is connected with the output end of the driving device and the adjusting assembly.

4. The automotive welding apparatus of claim 3, wherein: the rolling mechanism comprises a gear (12) fixedly connected with the end part of the connecting shaft (11), a rack (13) meshed with the gear (12) is arranged in the groove, and the connecting shaft (11) is perpendicular to the rack (13).

5. The automotive welding apparatus of claim 3, wherein: the bottom of the sliding plate (7) is connected with the top end face of the groove in a sliding mode through a sliding rail (6).

6. The automotive welding apparatus of claim 3, wherein: the driving device is a motor (10).

7. The automotive welding apparatus of claim 3, wherein: the transition mechanism comprises a driving bevel gear (16) and two driven bevel gears (15) fixedly arranged on the connecting shaft (11), the output end of the driving device is fixedly connected with the driving bevel gear (16), the driving bevel gear (16) is meshed with one of the driven bevel gears (15), the other driven bevel gear (15) is meshed with a transition bevel gear (17), the transition bevel gear (17) is connected with the adjusting component, and the transition bevel gear (17) is used for driving the adjusting component to rotate so as to adjust the height of the welding gun (2).

8. The automotive welding apparatus of claim 7, wherein: the adjusting assembly comprises a sliding rod (9), the top of the upright post (8) is provided with a sliding cavity with an upward opening, the lower end of the sliding rod (9) is slidably arranged in the sliding cavity, the top of the sliding rod (9) is provided with the welding gun (2), the sliding rod (9) is in threaded connection with a vertically arranged screw rod (19), the bottom of the upright post (8) is provided with an installation cavity (25) with a downward opening, the bottom of the screw rod (19) penetrates through the bottom of the sliding cavity and is arranged in the installation cavity (25), and the screw rod (19) is rotatably connected with the upright post (8);

the transmission shaft (20) is fixedly connected with the bottom of the transition bevel gear (17), the top of the transmission shaft (20) penetrates through the sliding plate (7) and is arranged in the installation cavity (25), the transmission shaft (20) is rotatably connected with the sliding plate (7), a connecting mechanism is further arranged in the installation cavity (25) and is used for connecting the transmission shaft (20) and the screw (19).

9. The automotive welding apparatus of claim 8, wherein: the connecting mechanism comprises a connecting sleeve (24) and two electromagnets (21), the connecting sleeve (24) is sleeved on the transmission shaft (20) through a sliding key in a vertically sliding manner, the two electromagnets (21) are respectively and fixedly arranged on the top of the mounting cavity (25) and the sliding plate (7), the connecting sleeve (24) is arranged between the two electromagnets (21), and the electromagnets (21) are used for adsorbing the connecting sleeve (24);

the top end face of adapter sleeve (24) is provided with first stopper (23), screw rod (19) side is provided with second stopper (22), second stopper (22) bottom with have the clearance between first stopper (23) top, work as installation cavity (25) top electro-magnet (21) adsorb during adapter sleeve (24), second stopper (22) are in on the rotation route of first stopper (23).

10. The automotive welding apparatus of claim 8, wherein: the sliding rod (9) is provided with a cavity with a downward opening, a fixing block (18) is fixedly arranged in the cavity, the fixing block (18) is provided with a threaded hole, and the screw rod (19) is connected with the threaded hole through threads.