CN213560512U

CN213560512U - Nut welding machine

Info

Publication number: CN213560512U
Application number: CN202022050981.4U
Authority: CN
Inventors: 房朋朋
Original assignee: Guangdong Pudian Automation Technology Co ltd
Current assignee: Guangdong Pudian Automation Technology Co ltd
Priority date: 2020-09-17
Filing date: 2020-09-17
Publication date: 2021-06-29
Anticipated expiration: 2030-09-17

Abstract

The utility model belongs to the technical field of nut welding equipment, in particular to a nut welding machine, which comprises a frame, a transformer, an upper electrode device, a lower electrode device, a foot switch, an electric cabinet and a vibrating disk, wherein the transformer is fixedly arranged in the frame, one ends of the upper electrode device and the lower electrode device are both fixedly arranged on the side surface of the frame, and the same ends of the upper electrode device and the lower electrode device are respectively provided with a conductive copper strip and a conductive copper plate; the other end of the upper electrode device is provided with a multi-stage cylinder, an upper electrode holding rod is arranged at the output end of the multi-stage cylinder, a lower electrode holding rod is arranged at one end of the lower electrode device, a nut distributor is further arranged on the upper electrode device, the vibrating disc is arranged adjacent to the rack, and the electric cabinet is fixedly mounted on the side face of the rack. Through the arrangement, the nut welding machine with the combination can save power consumption and improve the volume utilization rate of the cylinder when the nut is welded, so that the mechanical efficiency of the nut welding machine is higher.

Description

Nut welding machine

Technical Field

The utility model belongs to the technical field of the nut welding equipment, especially, relate to a nut welding machine.

Background

The nut is the part that couples together mechanical equipment zonulae occludens, through the inboard screw thread, the nut and the bolt of equal specification can link together, weld the nut on one of them mechanical component of butt joint, the bolt passes another mechanical component and is connected with the nut, thereby make the mechanical original paper of manufacturing link together, in the prior art, make nut welded process realize the automation through setting up the nut welding machine, thereby improve the production efficiency of whole production and the security of whole production operation, it is higher to have the welded consumption to adopt the nut welding machine among the prior art to carry out the welded in-process to the nut, thereby cause the lower technical problem of nut welding machine mechanical efficiency.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a nut welding machine aims at solving the lower technical problem of nut welding machine mechanical efficiency among the prior art.

In order to achieve the above object, an embodiment of the present invention provides a nut welding machine, which includes a frame, a transformer, an upper electrode device, a lower electrode device, a foot switch, an electric cabinet and a vibration tray, wherein the transformer is fixedly installed in the frame, the upper electrode device is located right above the lower electrode device, one ends of the upper electrode device and the lower electrode device are both fixedly installed on the side surface of the frame, the same ends of the upper electrode device and the lower electrode device are respectively provided with a conductive copper strip and a conductive copper plate, and the other ends of the conductive copper strip and the conductive copper plate are both fixedly installed on the transformer;

furthermore, the other end of the upper electrode device is provided with a multi-stage cylinder, the output end of the multi-stage cylinder is provided with an upper electrode holding rod, one end of the lower electrode device is provided with a lower electrode holding rod, the upper electrode holding rod is positioned right above the lower electrode holding rod, the foot switch is fixedly arranged on the side surface of the frame, the foot switch is positioned below the lower electrode device, the upper electrode device is also provided with a nut distributor, the vibration disk is arranged adjacent to the frame, the nut distributor is butted with the vibration disk, the nut distributor is connected with the nut conveying gun through a pipeline, the electric cabinet is fixedly arranged on the side surface of the rack, and the electric control box is electrically connected with the transformer, the upper electrode device, the lower electrode device and the foot switch respectively.

Preferably, the upper electrode device comprises an upper arm, an upper projection welding platform, an upper clamping seat and an upper electrode arm, one end of the upper projection welding platform is fixedly connected with the conductive copper strip, one end of the upper arm is fixedly mounted on the rack, the nut distributor is fixedly mounted on the side face of the upper arm, the output end of the multi-stage cylinder is fixedly mounted at the other end of the upper arm, the top of the upper clamping seat is connected with the output end of the multi-stage cylinder, the bottom of the upper clamping seat is connected with the top of the upper projection welding platform, the upper electrode arm is mounted between the upper clamping seat and the upper projection welding platform and extends outwards, the upper electrode holding rod is fixedly mounted on the upper electrode arm, and the electrode of the upper electrode holding rod is arranged downwards.

Preferably, the top of the upper arm is provided with an electromagnetic valve, and the electromagnetic valve is connected with the multistage cylinder through a pipeline.

Preferably, one end of the upper projection welding platform and the top of the upper electrode holding rod are both provided with an upper water cooling interface.

Preferably, lower electrode device includes lower arm, lower holder, lower butt weld platform and lower electrode arm, lower arm fixed mounting be in the frame, just the lower arm is located under the upper arm, the one end of lower butt weld platform with electrically conductive copper plate fixed connection, lower holder fixed mounting be in the top of the lower arm other end, lower butt weld platform mounting be in the top position of lower holder, just the electrode arm install down in the butt weld platform with between the lower holder, lower electrode holding rod fixed mounting be in on the electrode arm down, just the electrode holding rod electrode sets up down, just the lower electrode with the last electrode corresponds the setting.

Preferably, the bottom of the lower electrode holding rod is provided with an inductor.

Preferably, one end of the lower projection welding platform and the top of the lower electrode holding rod are both provided with lower water cooling interfaces.

Preferably, the rack is further provided with a water separator, the water separator is provided with a water feeding port and a water outlet, the water separator is arranged at a position, close to the bottom, of the side face of the rack, and the water separator is provided with a transformer connecting port, a silicon controlled rectifier connecting port, an upper electrode connecting port and a lower electrode connecting port.

Preferably, the rack is further provided with a flow meter, the bottom of the flow meter is provided with four input ports side by side, each input port is fixedly connected with the transformer connecting port, the thyristor connecting port, the upper electrode connecting port and the lower electrode connecting port respectively, and the top of the flow meter is provided with four output ports corresponding to the four input ports.

Preferably, still be provided with gas holder and combined filter in the frame, the gas holder fixed mounting be in the frame top, combined filter fixed mounting be in the frame side, combined filter with the gas holder pipeline intercommunication.

The embodiment of the utility model provides an above-mentioned one or more technical scheme in the nut welding machine have one of following technological effect at least:

the nut welding machine in the utility model comprises a frame, a transformer, an upper electrode device, a lower electrode device, a foot switch, an electric cabinet and a vibration disk, wherein the transformer is fixedly arranged in the frame, the upper electrode device is fixedly arranged on the frame, the lower electrode device is fixedly arranged on the frame and corresponds to the upper electrode device, simultaneously, a conductive copper strip and a point copper plate are fixedly arranged on the same side of the upper electrode device and the lower electrode device respectively, one end of the conductive copper strip and the conductive copper plate is connected with the transformer to realize the function of an air channel communication circuit through the conductive copper strip and the conductive copper plate, a multi-stage cylinder is arranged in the upper electrode device to realize the multi-layer pressurization of the nut to be welded, an upper electrode holding rod and a lower electrode holding rod are respectively arranged on the output end of the multi-stage cylinder and the corresponding position on the lower electrode device, the foot switch is fixedly arranged on the side of the frame, the foot switch is arranged below the underground electrode device, so that a user can conveniently turn on and turn off a power supply of the foot switch, the nut distributor is arranged on the upper electrode device, nuts can be conveyed to a lower electrode holding rod to be welded through the nut distributor to be welded, meanwhile, the placement adjustment before the input of the nuts is carried out through the vibration disc, the nuts are conveyed through the understanding pipeline between the nut distributor and the vibration disc for welding, and an electric cabinet electrically connected with the transformer, the upper electrode device, the lower electrode device and the foot switch is arranged on the side face of the rack to achieve control and adjustment of all parts. Through the arrangement, the nut welding machine with the combination can save power consumption and improve the volume utilization rate of the cylinder when the nut is welded, so that the mechanical efficiency of the nut welding machine is higher.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.

Fig. 1 is an effect diagram of the nut welding machine provided by the embodiment of the present invention.

Fig. 2 is a front view of a nut welding machine (without a vibrating disk) according to an embodiment of the present invention.

Fig. 3 is a side view of a nut welding machine according to an embodiment of the present invention.

Fig. 4 is a top view of the nut welding machine according to the embodiment of the present invention.

Wherein, in the figures, the respective reference numerals:

10-frame 11-gas storage tank 12-water separator

13-flowmeter 14-combined filter 15-nut conveying gun

20-transformer 30-upper electrode device 31-upper arm

32-upper projection welding platform 33-upper clamping seat 34-upper electrode arm

40-lower electrode device 41-lower arm 42-lower projection welding platform

43-lower clamping seat 44-lower electrode arm 50-foot switch

60-electric cabinet 70-vibrating disk 71-nut distributor

72-nut feeding bin 80-multi-stage cylinder 311-electromagnetic valve

321-upper water-cooling interface 341-upper electrode holding rod 421-lower water-cooling interface

441-inductor 442-lower electrode grip.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in fig. 1-4, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functionality throughout. The embodiments described below by referring to the drawings are exemplary and intended to explain the embodiments of the present invention and are not to be construed as limiting the present invention.

In the description of the embodiments of the present invention, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings, which is only for convenience in describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element so indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the invention.

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

In the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly, e.g., as fixed or detachable connections or as an integral part; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the embodiments of the present invention can be understood by those skilled in the art according to specific situations.

In an embodiment of the present invention, as shown in fig. 1 to 4, there is provided a nut welding machine, including a frame, a transformer, an upper electrode device 30, a lower electrode device 40, a foot switch 50, an electric cabinet 60 and a vibration plate 70, wherein the frame 10 is used for supporting an integral frame of the nut welding machine, the transformer 20 is used for adjusting welding current, the upper electrode device 30 and the lower electrode device 40 are used for cooperating to realize spot welding of nuts, the foot switch 50 is used for opening and closing a device, the electric cabinet 60 is used for adjusting a control device, the vibration plate 70 is used for adjusting nuts to be input, the transformer 20 is fixedly installed in the frame 10, the transformer 20 is installed in the frame 10 to protect the transformer 20 from moving, the upper electrode device 30 is located right above the lower electrode device 40, one end of the upper electrode device 30 and one end of the lower electrode device 40 are both fixedly installed at a side of the frame 10, the same end of the upper electrode device 30 and the same end of the lower electrode device 40 are respectively provided with a conductive copper strip and a conductive copper plate, and the other ends of the conductive copper strip and the conductive copper plate are both fixedly arranged on the transformer 20 and are arranged and selected by the positions of the upper electrode device 30 and the lower electrode device 40;

further, a multi-stage cylinder 80 is arranged at the other end of the upper electrode device 30, an upper electrode holding rod 341 and a lower electrode holding rod 442 are respectively arranged at positions corresponding to the lower electrode device 40 on the output end of the multi-stage cylinder 80, and the multi-stage cylinder 80 can reduce power consumption of the cylinder in the welding process and improve the volume utilization rate of the cylinder; the foot switch 50 is fixedly installed at a side surface of the frame 10, the foot switch 50 is located below the lower electrode device 40, the foot switch 50 is arranged below the lower electrode device 40, so that an operator can conveniently perform related operations on the foot switch 50 at any time during the operations, the upper electrode device 30 is further provided with a nut distributor 71, the vibration disc 70 is arranged adjacent to the frame 10, the nut distributor 71 is connected with the vibration disc 70 through a pipeline, the nuts are placed in the nut feeding bin 72 for storage and standby through the connection between the vibration disc 70 and the nut distributor 71, the nuts in the nut feeding bin 72 enter the vibration disc, the nuts after being arranged by the vibration disc are output through the nut distributor 71 and then are conveyed into the nut conveying gun 15 of the conveying assembly through the pipeline for placing on the lower electrode holding rod 442, the electric cabinet 60 is fixedly installed on a side surface of the rack 10, and the electric cabinet 60 is electrically connected to the transformer 20, the upper electrode device 30, the lower electrode device 40 and the foot switch 50, respectively, so that the control of each component is realized through the connection of the electric cabinet 60.

The nut welding machine in the utility model comprises a frame 10, a transformer 20, an upper electrode device 30, a lower electrode device 40, a foot switch 50, an electric cabinet 60 and a vibration disc 70, wherein the transformer 20 is fixedly arranged in the frame 10, the upper electrode device 30 is fixedly arranged on the frame 10, the lower electrode device 40 is fixedly arranged on the frame 10 and corresponds to the upper electrode device 30, meanwhile, a conductive copper strip and a point copper plate are respectively and fixedly arranged on the same side of the upper electrode device 30 and the lower electrode device 40, one end of the conductive copper strip and the conductive copper plate is connected with the transformer 20 to realize the function of an air passage communication circuit through the conductive copper strip and the conductive copper plate, a multistage cylinder 80 is arranged in the upper electrode device 30 to realize the multilayer pressurization of the nut to be welded, an upper electrode holding rod 341 and a lower electrode holding rod 442 are respectively arranged at the corresponding positions on the output end of the multistage cylinder 80 and the lower electrode device 40, the foot switch 50 is fixedly installed on the side surface of the rack 10, the foot switch 50 is arranged below a person under the ground or the device, a user can conveniently turn on and off the device, the nut distributor 71 is arranged on the upper electrode device 30, nuts can be conveyed to a lower electrode holding rod 442 to be welded through the nut distributor 71 to be welded, meanwhile, the placement adjustment before inputting of the nuts is carried out through the vibration disc 70, the nuts are conveyed through a knowledge pipeline between the nut distributor 71 and the vibration disc 70 to be used for welding, and the electric control box 60 electrically connected with the transformer 20, the upper electrode device 30, the lower electrode device 40 and the foot switch 50 is arranged on the side surface of the rack 10 to achieve control and adjustment of all parts. Through the arrangement, the nut can be pressurized in a multi-layer mode when the nut is welded by the combined nut welding machine, so that the nut is welded more firmly.

The nut is welded, an operator loads a workpiece to the upper part of the lower electrode holding rod 442, steps on the foot switch, starts the nut welding machine, the nut distributor 71 places the nut output from the vibration disc 70 in place, the upper electrode holding rod 341 is pressed downwards under the action of the multistage cylinder 80 to be in contact with the lower electrode holding rod 442 for welding, the lower electrode holding rod 442 returns after welding, and the operator unloads the workpiece and then carries out the next working cycle.

The nut welding machine is also provided with a microcomputer controller with a constant-current and constant-voltage control function, so that the nut welding machine can be controlled more accurately when the nut is welded, and meanwhile, the nut welding machine is connected with a direct-current welding power supply or an intermediate-frequency welding power supply, so that the impact on a power grid caused by the welding of the nut welding machine is minimized, and the control precision is higher.

In another embodiment of the present invention, as shown in fig. 1 to 3, the upper electrode assembly 30 includes an upper arm 31, an upper projection welding platform 32, an upper holder 33 and an upper electrode arm 34, the upper arm 31 is used for fixedly mounting and supporting the whole upper electrode assembly 30 parts layout between the upper arm 31 and the frame 10, the upper projection welding platform 32 and the upper holder 33 as well as the upper electrode arm 34 are used for fixedly welding parts, one end of the upper projection welding platform 32 is fixedly connected with the conductive red copper strip, one end of the upper arm 31 is fixedly mounted on the frame 10, the nut distributor 71 is fixedly mounted on the side of the upper arm 31, the output end of the multi-stage cylinder 80 is fixedly mounted at the other end of the upper arm 31, the top of the upper holder 33 is connected with the output end of the multi-stage cylinder 80, the bottom of the upper holder 33 is connected with the top of the upper projection welding platform 32, the upper electrode arm 34 is mounted between the upper holder 33 and the upper projection welding platform 32 and extends outwards, the upper electrode handle 341 is fixedly mounted on the upper electrode arm 34, the electrode of the upper electrode handle 341 is arranged downward, the upper electrode handle 341 is clamped by the upper electrode arm 34 and fixedly mounted between the upper projection welding platform 32 and the upper clamping seat 33 through the connection between the upper projection welding platform 32 and the conductive copper strip to achieve the communication between the upper electrode handle 341 and the circuit, and the conductive copper strip is arranged in a strip shape to adapt to the repeated lifting motion of the upper projection welding platform 32.

In another embodiment of the utility model, as shown in fig. 1 ~ 3, upper arm 31 top is provided with solenoid valve 311, solenoid valve 311 with pipe connection between the multistage cylinder 80 is connected through setting up between solenoid valve 311 and the multistage cylinder 80 for the gas circuit switching-over of cylinder, thereby control the flexible of multistage cylinder 80, and then control the lift of electrode holding rod 341, set up two exhaust return bends again in frame 10 and be connected with the gas vent of solenoid valve 311, because air output and speed are better than the silencer, can let the cylinder have faster corresponding speed.

In another embodiment of the present invention, as shown in fig. 1 to 3, the one end of the upper projection welding platform 32 and the top of the upper electrode holder 341 are both provided with an upper water-cooling interface 321, which is used for cooling water circulation by providing a plurality of water-cooling interfaces at the top of the upper electrode holder 341 and the one end of the upper projection welding platform 32, so as to cool the electrode.

In another embodiment of the present invention, as shown in fig. 1 to 3, the lower electrode device 40 includes a lower arm 41, a lower holder 43, a lower projection platform 42 and a lower electrode arm 44, the lower arm 41 is used for fixedly mounting and supporting the whole layout of the lower electrode device 40 parts with the frame 10, the lower projection platform 42, the lower holder 43 and the lower electrode arm 44 are used for fixedly welding parts, the lower arm 41 is fixedly mounted on the frame 10, the lower arm 41 is located under the upper arm 31, one end of the lower projection platform 42 is fixedly connected with the conductive red copper plate, the lower holder 43 is fixedly mounted on the top of the other end of the lower arm 41, the lower projection platform 42 is mounted on the top of the lower holder 43, the lower electrode arm 44 is mounted between the lower projection platform 42 and the lower holder 43, the lower electrode holding rod 442 is fixedly mounted on the lower electrode arm 44, and the lower electrode handle 442 electrode sets up upwards, just the lower electrode with the upper electrode corresponds the setting, through the connection between lower projection welding platform 42 and the electrically conductive copper plate, utilizes electrically conductive copper plate to realize switching on of circuit, and rethread lower electrode arm 44 centre gripping lower electrode handle 442 fixed mounting reaches the intercommunication between lower electrode handle 442 and the circuit between projection welding platform 42 and lower holder 43 down.

In another embodiment of the utility model, as shown in fig. 1-3, the bottom of bottom electrode holding rod 442 is provided with inductor 441, and the positive and negative condition of the nut of contact with bottom electrode holding rod 442 top locating pin when detecting the welding through setting up inductor 441 avoids appearing the situation that the nut welds reversely, raises the efficiency.

In another embodiment of the present invention, as shown in fig. 1 to 3, the one end of the lower projection welding platform 42 and the top of the lower electrode holding rod 442 are both provided with a lower water-cooling interface 421, which is used for cooling water circulation by providing a plurality of water-cooling interfaces on the one end of the lower projection welding platform 42 and the lower electrode holding rod 442, so as to cool the electrode.

A positioning pin for positioning the workpiece is provided at the top of the lower electrode grip 442 so that the workpiece can be accurately prevented from being seated thereon.

In another embodiment of the utility model, as shown in fig. 1-3, still be provided with water knockout drum 12 in the frame 10, be provided with water feeding mouth and outlet on the water knockout drum 12, just the water knockout drum 12 sets up the position that the side of frame 10 is close to the bottom, be provided with transformer 20 connector, silicon controlled rectifier connector, last electrode connector and lower electrode connector on the water knockout drum 12, realize supplying with the cooling water between the different parts through setting up water knockout drum 12, reach the cooling to this supply position.

In another embodiment of the present invention, as shown in fig. 1 to 3, a flow meter 13 is further disposed on the frame 10, four input ports are disposed at the bottom of the flow meter 13 side by side, each of the input ports is respectively connected to the transformer 20 connector, the silicon controlled connector, the upper electrode connector and the lower electrode connector fixed connection, the top of the flow meter 13 is provided with four output ports corresponding to the input ports, and the four output ports are connected to the flow meter 13 first, so as to accurately control the outflow volume of cooling water of each output port, thereby facilitating the control of the cooling water volume.

In another embodiment of the present invention, as shown in fig. 1 to 4, a gas storage tank 11 and a combined filter 14 are further disposed on the frame 10, the gas storage tank 11 is fixedly mounted on the top of the frame 10, the combined filter 14 is fixedly mounted on the side of the frame 10, and the combined filter 14 is in pipeline communication with the gas storage tank 11. Through setting up combination filter 14 and gas holder 11, through gas holder 11 storage gas, in the gas circuit system is inputed to 14 filtration back through combination filter, be connected between gas holder 11 and the multistage cylinder 80 simultaneously, to gas circuit system air flue steady voltage effect.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. A nut welding machine is characterized in that: the electric power generation device comprises a rack, a transformer, an upper electrode device, a lower electrode device, a foot switch, an electric cabinet and a vibrating disc, wherein the transformer is fixedly installed in the rack, the upper electrode device is positioned right above the lower electrode device, one ends of the upper electrode device and the lower electrode device are both fixedly installed on the side surface of the rack, the same ends of the upper electrode device and the lower electrode device are respectively provided with a conductive copper strip and a conductive copper plate, and the other ends of the conductive copper strip and the conductive copper plate are both fixedly installed on the transformer;

the vibration type transformer comprises an upper electrode device, a lower electrode device, a vibration disc, a motor, a transformer, a lower electrode device, a pedal switch, a vibration disc, an electric cabinet and a multi-stage cylinder, wherein the other end of the upper electrode device is provided with the multi-stage cylinder, an output end of the multi-stage cylinder is provided with an upper electrode holding rod, one end of the lower electrode device is provided with a lower electrode holding rod, the upper electrode holding rod is positioned right above the lower electrode holding rod, the pedal switch is fixedly installed on the side face of a rack, the pedal switch is positioned below the lower electrode device, the upper electrode device is further provided with a nut distributor, the vibration disc is adjacent to the rack, the nut distributor is connected with the vibration disc through a pipeline, the electric cabinet is fixedly installed on the side face of the rack, and the electric cabinet is respectively and electrically.

2. The nut welder according to claim 1, characterized in that: the upper electrode device comprises an upper arm, an upper convex welding platform, an upper clamping seat and an upper electrode arm, wherein one end of the upper convex welding platform is fixedly connected with the conductive red copper strip, one end of the upper arm is fixedly installed on the rack, the nut distributor is fixedly installed on the side face of the upper arm, the output end of the multi-stage cylinder is fixedly installed at the other end of the upper arm downwards, the top of the upper clamping seat is connected with the output end of the multi-stage cylinder, the bottom of the upper clamping seat is connected with the top of the upper convex welding platform, the upper electrode arm is installed between the upper clamping seat and the upper convex welding platform and extends outwards, the upper electrode holding rod is fixedly installed on the upper electrode arm, and the electrode of the upper electrode holding rod is arranged downwards.

3. The nut welder according to claim 2, characterized in that: the top of the upper arm is provided with an electromagnetic valve, and the electromagnetic valve is connected with the multistage cylinder through a pipeline.

4. The nut welder according to claim 2, characterized in that: and an upper water-cooling interface is arranged at one end of the upper convex welding platform and at the top of the upper electrode holding rod.

5. The nut welder according to claim 2, characterized in that: lower electrode device includes lower arm, lower holder, lower joint spacer and lower electrode arm, underarm fixed mounting is in the frame, just the underarm is located under the upper arm, the one end of lower joint spacer with electrically conductive copper plate fixed connection, lower holder fixed mounting is in the top of the underarm other end, lower joint spacer is in the top position of lower holder, just the electrode arm install down in the lower joint spacer with between the lower holder, lower electrode holding rod fixed mounting is in on the electrode arm down, just lower electrode holding rod electrode sets up, just the bottom electrode with the last electrode corresponds the setting.

6. The nut welder according to claim 5, characterized in that: and the bottom of the lower electrode holding rod is provided with an inductor.

7. The nut welder according to claim 5, characterized in that: and one end of the lower projection welding platform and the top of the lower electrode holding rod are both provided with lower water cooling interfaces.

8. The nut welder according to any one of claims 1 to 7, characterized in that: the water distributor is arranged at a position, close to the bottom, of the side face of the rack, and a transformer connecting port, a silicon controlled rectifier connecting port, an upper electrode connecting port and a lower electrode connecting port are arranged on the water distributor.

9. The nut welder according to claim 8, characterized in that: the rack is also provided with a flowmeter, the bottom of the flowmeter is provided with four input ports side by side, each input port is fixedly connected with the transformer connector, the silicon controlled connector, the upper electrode connector and the lower electrode connector respectively, and the top of the flowmeter and the four input ports are correspondingly provided with four output ports.

10. The nut welder according to claim 9, characterized in that: still be provided with gas holder and combined filter in the frame, gas holder fixed mounting be in the frame top, combined filter fixed mounting be in the frame side, combined filter with gas tank pipeline intercommunication.