CN213224815U

CN213224815U - Nut welding machine

Info

Publication number: CN213224815U
Application number: CN202021756562.6U
Authority: CN
Inventors: 陈良
Original assignee: Xishui Lvyang Auto Parts Co ltd Yong'an Branch
Current assignee: Xishui Lvyang Auto Parts Co ltd Yong'an Branch
Priority date: 2020-08-20
Filing date: 2020-08-20
Publication date: 2021-05-18
Anticipated expiration: 2030-08-20

Abstract

The utility model discloses a nut welding machine, including the welding storehouse, be equipped with the work piece on the lateral wall in welding storehouse and get and put mouth and door, be equipped with the pivoted seat of placing in the welding storehouse, place and install on the seat and steadily place the structure, be equipped with roof pressure piece in the welding storehouse, install the lift drive device about the control roof pressure piece on the welding storehouse, fixed mounting has the mount pad on the roof pressure piece, installs the soldered connection on the mount pad, and the soldered connection is connected with external welding machine through stretching out the hose outside the welding storehouse. Compared with the prior art, the welding of the nut on the workpiece can be realized only by taking the workpiece and the nut by workers in the whole process, the mechanical automatic welding is adopted, the welding efficiency is high, the speed is high, the automatic welding can enable the welding position to always keep the consistent welding effect, the welding quality is ensured, and the workload of the workers is greatly reduced; in addition, the nut is pressed and closely matched with the workpiece all the time during welding, and the welding quality is protected.

Description

Nut welding machine

Technical Field

The utility model relates to an auto-parts processing equipment, in particular to a nut welding machine that is used for nut on the gas receiver on the car to carry out the welding.

Background

Air reservoirs are well known as gas pressure devices in automotive brake systems. The air cylinder is used for storing air compressed by the air compressor (air pump) and is used for an automobile braking system. The air storage cylinder has four functions of energy storage, filtration, pressure stabilization and temperature reduction, wherein in the aspect of energy storage, the air quantity of a truck is too much, namely the air quantity is too small to be used for separating and combining a whistle and the air quantity is too large to be used for braking, and if the air storage cylinder is not arranged, the air quantity pumped out by the air compressor is not enough; at the moment, air pumped out by the air compressor needs to be stored in the air storage cylinder and used at a critical moment; just like a mountain stream, the mountain stream cannot drive a generator set, but can be pushed after being accumulated in a reservoir; in the aspect of filtration, because the air contains a large amount of dust and water molecules, if the air enters the air path of a vehicle, the parts of the vehicle are easy to damage after a long time, certain hidden trouble is caused to the driving safety, the air pumped by the air compressor stays in the air storage cylinder for a short time, and the water molecules, the dust and the engine oil in the air fall to the lower part of the air storage cylinder because the relative weights of the water molecules, the dust and the engine oil in the air are heavier than the air, so that the air storage cylinder plays a role in filtration; the design of the pressure-stabilizing single-pipe inlet and outlet air has the advantages that when no good air is pumped into a vehicle through the air compressor in the pressure-stabilizing effect, the compressed air flowing into the air passage of the vehicle is extremely unstable due to the up-and-down movement of the piston of the air compressor, the air storage cylinder is similar to a reservoir, the flowing unstable air stays firstly, and then the compressed air after pressure stabilization flows out through the outlet; in the aspect of cooling, the outside air is sucked into the air compressor to be compressed, the volume is reduced, meanwhile, a certain temperature is generated, the relative density is reduced when the temperature is increased, and the volume of the stored air is reduced; the moisture carried in the air is not easy to precipitate due to the temperature; therefore, the air entering the automobile air passage must be cooled firstly, and the cooling process is realized in two parts, one is a spiral pipe, and the other is an air storage cylinder; it is known that the air reservoir plays a crucial role in automobile accessories.

The existing gas cylinder structurally comprises a cylindrical cylinder body, seal heads are arranged at two ends of the cylinder body, nuts are arranged on the outer side wall of the cylinder body and the outer surfaces of the seal heads, the nuts on the cylinder body are welded and fixed after the cylinder body is machined, the corresponding nuts on the seal heads are welded and fixed after the seal heads are machined, and the cylinder body and the seal heads which are welded and fixed with the nuts are welded and fixed together. However, in the conventional nut welding process, the nut is manually placed on the nut and then welded by a welding head of a welding machine. According to the welding mode, the nut can run out of position to a certain extent when being welded manually, so that the nut is welded accurately, and the manual operation work efficiency is low.

Accordingly, the present inventors have made extensive studies on the above problems, and as a result, the present invention has been made.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at providing an adopt automatic welding, and the nut can not run the position during welding, and welding quality is good, the efficient nut welding machine of welding.

In order to achieve the above purpose, the solution of the present invention is: the nut welding machine comprises a welding bin, a workpiece taking and placing opening for placing a workpiece in the welding bin and a bin door for closing or opening the workpiece taking and placing opening are arranged on the side wall of the welding bin, a placing seat for placing a workpiece is arranged in the welding bin, the placing seat is rotatably arranged in the welding bin, and the welding bin is provided with a rotation driving device for controlling the placing seat to rotate, the placing seat is provided with a stable placing structure for stably placing the workpiece, a jacking part which is arranged above the placing seat and is vertically aligned with the nut on the workpiece on the placing seat is arranged in the welding bin, the welding bin is provided with a lifting driving device for controlling the jacking part to move up and down, the jacking part is fixedly provided with a mounting seat positioned beside one side of the jacking part, the mounting seat is provided with a welding head, the welding end of the welding head is arranged downwards, and the welding head is connected with an external welding machine through a hose extending out of the welding bin.

The welding bin is provided with a base and a cover body fixedly welded on the base, a notch which extends upwards to the top surface of the cover body and extends along the circumferential direction of the cover body is arranged on the side wall of the cover body, the notch is a workpiece taking and placing opening, the bin door is arranged in the cover body and rotates along the circumferential direction of the cover body, and the top of the bin door is hinged with the top of the cover body through a rotating shaft.

The placing seat is provided with an upper cross rod, a lower cross rod and a vertical rod between the upper cross rod and the lower cross rod, the vertical rod is connected with the first end part of the upper cross rod and the first end part of the lower cross rod in an integrated forming mode, the second end part of the lower cross rod is rotatably installed on the top surface of the base through a rotating shaft, a motor driving device for driving the rotating shaft to rotate is installed in the base, and the motor driving device and the rotating shaft form the rotating driving device.

The placing seat is a circular disk body, the circular disk body is flatly placed on the base, the center of the bottom of the circular disk body is rotatably installed on the top surface of the base through a rotating shaft, a motor driving device for driving the rotating shaft to rotate is installed in the base, and the motor driving device and the rotating shaft form the rotating driving device.

Weld stopper and supporting shoe outside the suit top surface of last horizontal pole on the above-mentioned last horizontal pole, the equal protruding bar sand grip that extends along the length direction of last horizontal pole that is equipped with of top surface of above-mentioned stopper and supporting shoe, the surface of this bar sand grip is the convex cambered surface that makes progress, above-mentioned stopper is located the first end department of above-mentioned last horizontal pole, above-mentioned supporting shoe is located the second end department of above-mentioned last horizontal pole, above-mentioned last horizontal pole is located and welds between above-mentioned stopper and the supporting shoe and has been fixed with the cylinder piece, just counterpoint about above-mentioned cylinder piece and above-mentioned roof pressure spare, above-mentioned stopper, supporting shoe and above.

The lifting driving device is a lifting cylinder, a cylinder body of the lifting cylinder is fixed outside the top surface of the cover body, a piston rod of the lifting cylinder penetrates through the top of the cover body downwards to the inside of the cover body, a sleeve block is fixedly sleeved outside the piston rod of the lifting cylinder, a cylindrical rod extending downwards is fixedly arranged on the bottom surface of the sleeve block, the cylindrical rod and the sleeve block form the jacking part, a strip-shaped vertical plate extends outwards from one side of the sleeve block, the length direction of the strip-shaped vertical plate is perpendicular to the upper cross rod, a locking block is fixedly locked on one surface of the vertical plate, which faces the second end of the upper cross rod, a through hole extending along the length direction of the strip-shaped vertical plate is formed in the locking block, the welding head penetrates through the through hole in a tight fit mode, and the strip-shaped vertical plate and the locking block.

A portal frame is fixed on the top surface of the base, the cover body is positioned in the portal frame, a fixed block is arranged at the position, above the locking block, of the portal frame, a guide rod penetrating through the fixed block is tightly sleeved in the fixed block, and the lower end of the guide rod is fixedly connected with the locking block or the strip-shaped vertical plate.

The structure is provided with a plurality of to above-mentioned steadily place, each steadily place the structure and encircle the distribution along the circumference interval of placing the seat, above-mentioned steadily place the structure and have the fixed column of erectting on placing the seat top surface, the top surface of fixed column has the outside diameter that upwards extends and is less than the first support column of fixed column external diameter, the outside extension in one side of above-mentioned fixed column has and places the mounting plate that the seat top surface overlapped mutually, mounting plate is the strip structure, the riser that relative interval set up is erect to the top surface of above-mentioned mounting plate, the range direction of two risers is the same with mounting plate's length direction, even be equipped with the guide post between the coexistence board, above-mentioned guide post overcoat is equipped with the sliding sleeve, above-mentioned sliding sleeve passes through the tight bolt in top and the guide post fixed fit of spiral shell dress on the sliding sleeve, the top.

After the technical scheme is adopted, the utility model discloses a nut welding machine, during the application, directly place the work piece (like stack shell or head) of waiting to weld on steadily placing the structure, later place the nut in the top surface department of work piece again, later the roof pressure piece moves the roof pressure downwards and presses on the nut, makes nut and work piece hug closely the cooperation, and the soldered connection correspondingly moves down to the welded junction of nut and work piece when the roof pressure piece moves down, and soldered connection and placing seat work this moment, and the soldered connection can carry out 360 degrees circumference weldings to the welded junction of work piece and nut; after welding, the jacking part moves upwards, and then the welded workpiece can be taken down. Compared with the prior art, the welding of the nut on the workpiece can be realized only by taking the workpiece and the nut by workers in the whole process, the welding is carried out while rotating without manually holding a welding head, mechanical automatic welding is adopted, the welding efficiency is high, the welding speed is high, the welding part can always keep a consistent welding effect by automatic welding, the welding quality is ensured, meanwhile, the whole operation workers only need to take and place the air storage cylinder, and the workload of the workers is greatly reduced; in addition, the nut is pressed and closely matched with the workpiece all the time during welding, and the welding quality is protected.

Drawings

FIG. 1 is a schematic structural diagram according to a first embodiment;

FIG. 2 is a schematic partial structure diagram according to a second embodiment;

FIG. 3 is a schematic diagram of the second embodiment.

Detailed Description

The first embodiment of the nut welding machine of the utility model, as shown in figure 1, comprises a welding bin 1, a workpiece taking and placing opening for placing a workpiece inside and a bin door 2 for closing or opening the workpiece taking and placing opening are arranged on the side wall of the welding bin 1, specifically, the welding bin 1 is provided with a base 11 and a cover body 12 welded on the base 11, the side wall of the cover body 12 is provided with a notch which extends upwards to the top surface of the cover body and extends along the circumferential direction of the cover body, the notch is the workpiece taking and placing opening, namely, the base 11 is a square base body, the cover body 12 is provided with a circular side wall and a top part which is positioned above the side wall and welded with the side wall, the top part is in a conical shape gradually expanding from top to bottom, the circular side wall is provided with a fracture which is broken up and down, the top part is correspondingly provided with a communicating opening communicated with the fracture corresponding to the fracture opening, and the fracture and the communicating opening form the workpiece taking; the bin gate 2 is arranged in the cover body 12, the bin gate 2 is correspondingly provided with a side plate matched with the arc shape of the circular side wall and a top plate matched with the top, and the topmost part of the top plate is hinged with the central part of the top of the cover body 12 through a rotating shaft, so that the bin gate 2 can rotate around the cover body 12 in an arc shape with a certain angle. When in use, the door 2 is convenient to pull, and a handle 21 can be arranged on the outer side wall of the door.

A placing seat for placing a workpiece is arranged in the welding bin 1, the placing seat is arranged in the welding bin in a rotating way, and the welding cabin 1 is provided with a rotation driving device for controlling the rotation of the placing seat, in particular, the placing seat is provided with an upper cross rod 31, a lower cross rod 32 and a vertical rod 33 positioned between the upper cross rod and the lower cross rod, the vertical rod 33 is integrally connected with the first end part of the upper cross rod 31 and the first end part of the lower cross rod 32, the vertical rod, the upper cross rod and the lower cross rod form an integrated U-shaped frame body with an inward opening, the second end part of the lower cross rod 32 is rotatably arranged on the top surface of the base through a rotating shaft, the rotating installation mode is the known technology, the above-mentioned description is not repeated, and the base is equipped with a motor driving device for driving rotation of rotating shaft, the motor driving device and rotating shaft are formed into the above-mentioned rotation driving device, such motor drives are also known, such as a separate motor or the cooperation of a motor with a gear transmission. When the electric bicycle is used, the motor is started, the rotating shaft rotates, and the rotating shaft rotates to enable the whole placing seat to rotate in the circumferential direction.

The placing seat is provided with a stable placing structure for realizing stable placing of workpieces, specifically, the upper cross rod 31 is welded with a limiting block 41 and a supporting block 42 which are sleeved outside the top surface of the upper cross rod 31, the top surfaces of the limiting block 41 and the supporting block 42 are respectively provided with a strip-shaped convex strip 411 which extends along the length direction of the upper cross rod 31 in a protruding mode, the outer surface of the strip-shaped convex strip is a convex arc surface which protrudes upwards, the limiting block 41 is located at the first end of the upper cross rod 31, the supporting block 42 is located at the second end of the upper cross rod 31, the upper cross rod 31 is located between the limiting block 41 and the supporting block 42, and a cylindrical block 43 is welded between the limiting block, the supporting block and. The stable placement structure of the structure is generally suitable for placement of the cylinder body, the cylinder body is horizontally arranged during use, the upper cross rod 31 extends into the cylinder body and is matched with the inner wall of the cylinder body in a sticking way, then the limiting block 41 is tightly attached to one end part of the cylinder body in the axial direction, and the supporting block 42 is positioned in the second end part of the cylinder body in the axial direction and supports the cylinder body.

A jacking part 5 which is positioned above the placing seat and is vertically aligned with a nut on a workpiece on the placing seat is arranged in the welding bin 1, a lifting driving device for controlling the jacking part to move up and down is arranged on the welding bin, a mounting seat which is positioned beside one side of the jacking part is fixedly arranged on the jacking part, a welding head 6 is arranged on the mounting seat, the welding end of the welding head 6 is arranged downwards, and the welding head 6 is connected with an external welding machine through a hose 61 which extends out of the welding bin; the fit and working principle of the welding head 6, the hose 61 and the welding machine are well known and will not be described in detail here.

Specifically, the lifting driving device is a lifting cylinder 7, a cylinder body of the lifting cylinder 7 is fixed outside the top of the cover body 12, a piston rod of the lifting cylinder 7 passes through the top of the cover body downwards to the inside of the cover body, a sleeve block 51 is fixedly sleeved outside the piston rod of the lifting cylinder 7, a cylindrical rod 52 extending downwards is fixedly arranged on the bottom surface of the sleeve block 51, the cylindrical rod 51 and the sleeve block 52 form the jacking part 5, the cylindrical rod 52 and the cylindrical block 43 are arranged in an up-down aligned manner, a bar-shaped vertical plate 53 extends outwards from one side of the sleeve block 52, the length direction of the bar-shaped vertical plate 53 is perpendicular to the upper cross rod 31, a locking block 54 is fixedly locked on one side of the second end of the upper cross rod 53, a through hole extending along the length direction of the bar-shaped vertical plate is formed in the locking block 54, the welding head 6 passes through the through hole in a tight fit manner. During application, when the lifting seat 7 extends, the jacking part 5 can translate towards the cylindrical block 42, so that the cylindrical rod 52 can be pressed on the cylindrical block 43, and meanwhile, the welding head 6 correspondingly moves downwards to the upper cross rod.

When the nut welding machine is used, a barrel body to be welded is directly transversely placed, an upper transverse rod extends into a hollow cavity of the barrel body, the barrel body is arranged in a hanging mode, a limiting block 41 is tightly propped against one axial end of the barrel body, a supporting block 42 is located inside the barrel body and supports the second axial end of the barrel body, a cylindrical block 43 supports the axial central area of the barrel body, the barrel body is supported at three points and is stably placed, a nut is placed on the top surface of the barrel body and is aligned with the cylindrical block 43 up and down, then a bin door 2 is closed, a lifting cylinder 7 is started, a piston rod of the lifting cylinder extends out to enable a cylindrical rod 51 to move downwards and be overlapped on the nut, the nut is clamped between the cylindrical rod 51 and the cylindrical block 43, the nut is fixed on one hand, and the barrel body cannot move on the other hand; finally, the welding machine and the motor work, the welding head 6 welds the welding position of the nut and the cylinder body, and the cylinder body correspondingly rotates in the circumferential direction by the rotation of the placing seat, so that the circumferential direction of the nut and the cylinder body are welded together in an all-round way; after welding, the lifting cylinder contracts, and the jacking part moves upwards, so that the welded workpiece can be taken down. Compared with the prior art, the welding of the nut on the workpiece can be realized only by taking the workpiece and the nut by workers in the whole process, the welding is carried out while rotating without manually holding a welding head, mechanical automatic welding is adopted, the welding efficiency is high, the welding speed is high, the welding part can always keep a consistent welding effect by automatic welding, the welding quality is ensured, meanwhile, the whole operation workers only need to take and place the air storage cylinder, and the workload of the workers is greatly reduced; in addition, the nut is pressed and closely matched with the workpiece all the time during welding, the welding quality is protected, the pressing piece and the welding head are arranged together to be lifted synchronously, the whole structure is simple, the nut is positioned in a closed space during welding, sparks generated during welding cannot be splashed randomly, and the welding is safe.

In this embodiment, a portal frame 13 is fixed on the top surface of the base 11, the portal frame 13 has an upper beam and two longitudinal beams, the cover 12 is located between the two longitudinal beams of the portal frame 13, a fixing block 14 is arranged above the locking block 54 of the portal frame 13, a guide rod 15 penetrating through the fixing block is tightly sleeved in the fixing block 14, and the lower end of the guide rod 15 is fixedly connected with the locking block 54, so that when the welding head 6 moves up and down and translates, the guide rod 15 correspondingly moves up and down and translates the welding head 6 around the fixing block 14 to guide the up and down movement of the welding head 6, and the welding head 6 moves up and down more stably. In this novel, the lower extreme of guide bar 15 also can with bar riser fixed connection.

The novel nut welding machine, embodiment two, as shown in fig. 2 and 3, is different from embodiment one only in that: the structure of the placing seat and the stable placing structure is characterized in that the placing seat is a circular disc body, the circular disc body is placed on the base in a flatwise manner, the center part of the bottom surface of the circular disc body is rotatably installed on the top surface of the base through a rotating shaft, a motor driving device for driving the rotating shaft to rotate is installed in the base, the motor driving device and the rotating shaft form a rotation driving device, the motor driving device is the same as the motor driving device in the first embodiment, a plurality of stable placing structures are arranged, the stable placing structures are circumferentially distributed at intervals along the circumferential direction of the placing seat, preferably three stable placing structures are adopted, each stable placing structure is provided with a fixing column 91 fixedly erected on the top surface of the placing seat, the top surface of each fixing column 91 is provided with a first supporting column 92 extending upwards, the outer diameter of each supporting column is smaller than the outer diameter of the corresponding fixing column, the mounting base plate 93 is a flat strip structure, vertical plates 94 which are oppositely arranged at intervals are vertically arranged on the top surface of the mounting base plate 93, the arrangement direction of the two vertical plates 94 is the same as the length direction of the mounting base plate, guide posts 95 are continuously arranged between the two vertical plates 94, the number of the guide posts 95 can be two, the two guide posts 95 are transversely arranged at intervals, sliding sleeves 96 are sleeved outside the guide posts 95, the sliding sleeves 96 are fixedly matched with the guide posts 95 through puller bolts 97 which are screwed on the sliding sleeves, namely the puller bolts 97 are screwed on the sliding sleeves 96, the heads of the puller bolts 97 are positioned outside the sliding sleeves 96, the free end parts of the rod parts of the puller bolts 97 penetrate through the outer side walls of the sliding sleeves to support the guide posts 95, so that the sliding sleeves 96 cannot slide, and the top surface of the sliding sleeves 96 is fixedly provided with second support posts 97 which extend upwards. As shown in fig. 3, the welding machine of this embodiment is suitable for welding the end socket 100, when in use, the end socket 100 covers the stably placed structure, the stably placed structure is located in the end socket 100, the first support column 92 supports one side of the end socket 100, the second support column 97 supports the other side of the end socket 100, the bottom surface of the end socket 100 is higher than the tightening bolt 97, the tightening bolt 97 is loosened by the screw, the sliding sleeve 96 enables the distance between the sliding sleeve 96 and the first support column to be matched with the inner diameter of the end socket 100, so that the end socket 100 is supported while being supported by the first support column and the second support column, the end socket 100 cannot shake, meanwhile, the sliding sleeve 96 can be used for fixing and placing end sockets with different inner diameters on one hand, and separation of the end socket and the stably placed structure can be facilitated.

The nut welding machine of the first embodiment is suitable for welding the cylinder body and the nut, and the nut welding machine of the second embodiment is suitable for welding the seal head and the nut.

This novel nut welding machine, in order to make things convenient for stretching out of hose 61, the concave notch that supplies the hose card to go into to pass that is equipped with on the lateral wall of door.

The above embodiments and drawings do not limit the form and style of the present invention, and any suitable changes or modifications made by those skilled in the art should not be considered as departing from the scope of the present invention.

Claims

1. Nut welding machine, its characterized in that: comprises a welding bin, a workpiece taking and placing opening for placing a workpiece in the welding bin and a bin door for closing or opening the workpiece taking and placing opening are arranged on the side wall of the welding bin, a placing seat for placing a workpiece is arranged in the welding bin, the placing seat is rotatably arranged in the welding bin, and the welding bin is provided with a rotation driving device for controlling the placing seat to rotate, the placing seat is provided with a stable placing structure for stably placing the workpiece, a jacking part which is arranged above the placing seat and is vertically aligned with the nut on the workpiece on the placing seat is arranged in the welding bin, the welding bin is provided with a lifting driving device for controlling the jacking part to move up and down, the jacking part is fixedly provided with a mounting seat positioned beside one side of the jacking part, the mounting seat is provided with a welding head, the welding end of the welding head is arranged downwards, and the welding head is connected with an external welding machine through a hose extending out of the welding bin.

2. The nut welding machine of claim 1, characterized in that: the welding bin is provided with a base and a cover body fixedly welded on the base, a notch which extends upwards to the top surface of the cover body and extends along the circumferential direction of the cover body is arranged on the side wall of the cover body, the notch is a workpiece taking and placing opening, the bin door is arranged in the cover body and rotates along the circumferential direction of the cover body, and the top of the bin door is hinged with the top of the cover body through a rotating shaft.

3. The nut welding machine of claim 2, characterized in that: the placing seat is provided with an upper cross rod, a lower cross rod and a vertical rod between the upper cross rod and the lower cross rod, the vertical rod is connected with the first end part of the upper cross rod and the first end part of the lower cross rod in an integrated forming mode, the second end part of the lower cross rod is rotatably installed on the top surface of the base through a rotating shaft, a motor driving device for driving the rotating shaft to rotate is installed in the base, and the motor driving device and the rotating shaft form the rotating driving device.

4. The nut welding machine of claim 2, characterized in that: the placing seat is a circular disk body, the circular disk body is flatly placed on the base, the center of the bottom of the circular disk body is rotatably installed on the top surface of the base through a rotating shaft, a motor driving device for driving the rotating shaft to rotate is installed in the base, and the motor driving device and the rotating shaft form the rotating driving device.

5. The nut welding machine of claim 3, characterized in that: weld stopper and supporting shoe outside the suit top surface of last horizontal pole on the above-mentioned last horizontal pole, the equal protruding bar sand grip that extends along the length direction of last horizontal pole that is equipped with of top surface of above-mentioned stopper and supporting shoe, the surface of this bar sand grip is the convex cambered surface that makes progress, above-mentioned stopper is located the first end department of above-mentioned last horizontal pole, above-mentioned supporting shoe is located the second end department of above-mentioned last horizontal pole, above-mentioned last horizontal pole is located and welds between above-mentioned stopper and the supporting shoe and has been fixed with the cylinder piece, just counterpoint about above-mentioned cylinder piece and above-mentioned roof pressure spare, above-mentioned stopper, supporting shoe and above.

6. The nut welding machine of claim 5, characterized in that: the lifting driving device is a lifting cylinder, a cylinder body of the lifting cylinder is fixed outside the top surface of the cover body, a piston rod of the lifting cylinder penetrates through the top of the cover body downwards to the inside of the cover body, a sleeve block is fixedly sleeved outside the piston rod of the lifting cylinder, a cylindrical rod extending downwards is fixedly arranged on the bottom surface of the sleeve block, the cylindrical rod and the sleeve block form the jacking part, a strip-shaped vertical plate extends outwards from one side of the sleeve block, the length direction of the strip-shaped vertical plate is perpendicular to the upper cross rod, a locking block is fixedly locked on one surface of the vertical plate, which faces the second end of the upper cross rod, a through hole extending along the length direction of the strip-shaped vertical plate is formed in the locking block, the welding head penetrates through the through hole in a tight fit mode, and the strip-shaped vertical plate and the locking block.

7. The nut welding machine of claim 6, characterized in that: a portal frame is fixed on the top surface of the base, the cover body is positioned in the portal frame, a fixed block is arranged at the position, above the locking block, of the portal frame, a guide rod penetrating through the fixed block is tightly sleeved in the fixed block, and the lower end of the guide rod is fixedly connected with the locking block or the strip-shaped vertical plate.

8. The nut welding machine of claim 4, characterized in that: the structure is provided with a plurality of to above-mentioned steadily place, each steadily place the structure and encircle the distribution along the circumference interval of placing the seat, above-mentioned steadily place the structure and have the fixed column of erectting on placing the seat top surface, the top surface of fixed column has the outside diameter that upwards extends and is less than the first support column of fixed column external diameter, the outside extension in one side of above-mentioned fixed column has and places the mounting plate that the seat top surface overlapped mutually, mounting plate is the strip structure, the riser that relative interval set up is erect to the top surface of above-mentioned mounting plate, the range direction of two risers is the same with mounting plate's length direction, even be equipped with the guide post between the coexistence board, above-mentioned guide post overcoat is equipped with the sliding sleeve, above-mentioned sliding sleeve passes through the tight bolt in top and the guide post fixed fit of spiral shell dress on the sliding sleeve, the top.