CN221110243U

CN221110243U - Pulse welding device

Info

Publication number: CN221110243U
Application number: CN202322265438.XU
Authority: CN
Inventors: 曾庆勇
Original assignee: Hubei Haowu Technology Co ltd
Current assignee: Hubei Haowu Technology Co ltd
Priority date: 2023-08-23
Filing date: 2023-08-23
Publication date: 2024-06-11
Anticipated expiration: 2033-08-23

Abstract

The utility model discloses a pulse welding device, relates to the technical field of automobile manufacturing welding, and aims to solve the problems of high manual requirement and low yield of the existing welding device. The pulse welding device comprises a cabinet body, a power supply conversion device, a pulse control device, a pulse generation device, a PLC (programmable logic controller), a gas circuit pipe fitting and a pulse welding clamp for pneumatically clamping and welding a welding pipeline; the power supply conversion device, the pulse generation device, the PLC and the gas circuit pipe fitting are arranged in the cabinet body, the power supply conversion device is externally connected with a power supply and is electrically connected with the pulse control device, the pulse generation device and the PLC, the pulse welding clamp is arranged on the cabinet body, a pipeline to be welded is arranged on the pulse welding clamp, the pulse generation device is electrically connected with a welding electrode of the pulse welding clamp, a welding head for welding the pipeline is arranged on the pulse welding clamp, and the gas circuit pipe fitting is communicated with the pulse welding clamp. The pulse welding device has low manual requirement and high yield.

Description

Pulse welding device

Technical Field

The application relates to the technical field of automobile manufacturing welding, in particular to a pulse welding device suitable for welding pipelines such as an automobile pipeline system, a stainless steel pipe, a corrugated pipe, an EGR pipe and the like.

Background

At present, the welding of the automobile pipeline mainly adopts the following welding equipment:

Argon arc welding: the welding technology is characterized in that the welding technology (manual positioning, precision, large melting pool of 1-3mm, high temperature, high requirement of workers, poor working environment and high adaptability) is adopted;

Laser welding: a high-efficiency precise welding method using laser beam with high energy density as heat source. (characterized in that the fixture or robot is positioned with high precision, 0.5-2mm in the molten pool, high temperature, high worker requirement, working environment and adaptability);

resistance welding: the work piece is heated by resistance heat generated when current passes through the work piece to weld. (the characteristic is low positioning accuracy, 1-3mm in molten pool, medium temperature, medium worker requirement, medium working environment and medium adaptability). The existing welding has high requirements on workers, has high production efficiency (at least 2 welding spots in each circle, long welding completion time), has high yield (welding pool is more than 0.5mm, and products have defects), and has consistency.

No matter which welding form is adopted, the problems of high requirements on workers, low production efficiency and low yield caused by manual instability exist.

Disclosure of utility model

The utility model aims to provide a pulse welding device which is used for solving the problems of low manual welding efficiency and low yield.

In order to achieve the above object, the present utility model provides the following technical solutions:

The pulse welding device comprises a cabinet body, a power supply conversion device, a pulse control device, a pulse generation device, a PLC (programmable logic controller), a gas circuit pipe fitting and a pulse welding fixture for pneumatically clamping and welding a welding pipeline;

The pulse welding device comprises a power supply conversion device, a pulse control device, a pulse generation device, a PLC (programmable logic controller) and an air channel pipe fitting, wherein the power supply conversion device is externally connected with a power supply and is electrically connected with the pulse control device, the pulse generation device and the PLC, a pulse welding clamp is placed on the cabinet, a pipeline to be welded is installed on the pulse welding clamp, the pulse generation device is electrically connected with a welding electrode of the pulse welding clamp, a welding head for welding the welding pipeline is installed on the pulse welding clamp, and the air channel pipe fitting is communicated with the pulse welding clamp.

Compared with the prior art, the clamp for pulse welding has the following beneficial effects:

The pulse welding device provided by the utility model adopts the PLC controller to accurately control the whole working process. The pulse welding fixture is matched, after the to-be-welded multi-section pipeline is installed on the fixture, the to-be-welded multi-section pipeline is pneumatically held and fixed, the to-be-welded multi-section pipeline can be ensured to be in a required welding shape and position on the fixture, and a pulse welding head is used for automatically completing welding parts rapidly and accurately. The whole working process has low requirements on workers, only parts are required to be installed and taken out, compared with the traditional welding mode in which parts are required to be installed and taken out through segmented spot welding, the production efficiency is high, welding and shaping are completed in 0.1s for 2-6 segments of pipeline parts at one time, the finished product rate is high, the appearance is free of welding points and flaws, and the welding device has strong practicability.

Drawings

Other and further objects and advantages will become apparent from the following description. The drawings are intended to illustrate examples of the various forms of the utility model. The drawings are not to be construed as illustrating all the ways in which the utility model may be made and used. Variations and substitutions of the various components of the utility model are, of course, possible. The utility model resides as well in the sub-combinations and sub-systems of the elements described and in the methods of using them.

In the drawings:

FIG. 1 is a front view of a pulse welding apparatus provided by the present utility model;

FIG. 2 is a side view of a pulse welding apparatus provided by the present utility model;

FIG. 3 is a front view of a pulse welding apparatus provided by the present utility model;

FIG. 4 is a diagram showing the internal structure of the pulse welding device according to the present utility model;

FIG. 5 is an isometric view of a pulse welding apparatus provided by the present utility model;

FIG. 6 is a schematic view of a pulse welding jig according to an embodiment of the present utility model;

FIG. 7 is a side view of a pulse welding jig according to an embodiment of the utility model;

FIG. 8 is a top view of a pulse welding jig according to an embodiment of the present utility model;

FIG. 9 is a schematic view of a pneumatic fastening device according to an embodiment of the present utility model;

Fig. 10 is a schematic view of an end stop in an embodiment of the utility model.

Reference numerals:

1-pulse control board adjusting knob, 2-pulse control board, 3-start button, 4-transformer, 5-power switch, 6-power connection line, 7-PLC controller, 8-power interface, 9-foot control switch interface, 10-controllable energy storage capacitor connection line, 11-controllable energy storage capacitor, 12-welding solenoid valve, 13-triplet, 14-rectifier transformer, 15-caster, 16-welding element connection board, 17-discharge resistor, 18-cooling fan, 19-work bench, 20-work table, 21 (25) -output welding end, 22 (23) -welding solenoid valve air inlet and outlet interface, 24-total air inlet interface, 26-PLC controller and pulse control board communication line, 110-mount pad, 115-bottom plate, 116-insulating plate, 120-pneumatic clamping device, 121-welding fixed block, 122-cylinder fixing seat, 123-clamping cylinder, 124-clamping block, 125-mount post, 140-positioning block, 150-pneumatic fixing device, 160-end limiting device, 170-welding electrode, 200-welding head.

Detailed Description

In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the utility model is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise. The meaning of "a number" is one or more than one unless specifically defined otherwise.

In the description of the present utility model, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", etc., are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

As shown in fig. 1 to 10, the pulse welding device provided by the utility model comprises a cabinet body, a power supply conversion device, a pulse control device, a pulse generation device, a PLC controller 7, a gas circuit pipe fitting and a pulse welding fixture for pneumatically clamping and welding a welding pipeline; the power supply conversion device, the pulse generation device, the PLC 7 and the air channel pipe fitting are arranged in the cabinet body, the power supply conversion device is externally connected with a power supply and is electrically connected with the pulse control device, the pulse generation device and the PLC 7, the pulse welding clamp is arranged on the cabinet body, a pipeline to be welded is arranged on the pulse welding clamp, the pulse generation device is electrically connected with a welding electrode of the pulse welding clamp, a welding head for welding the welding pipeline is arranged on the pulse welding clamp, and the air channel pipe fitting is communicated with the pulse welding clamp.

In specific implementation, the utility model is realized in the following way:

The pulse control board adjusting knob 1 is an adjusting resistor, and signals the pulse control board 2 through the magnitude of the resistance value, so that the corresponding voltage value is set for the pulse control board 2.

The pulse control board 2 is connected with the PLC 7 and the controllable energy storage capacitor 11 through signal lines and receives parameter signals of the PLC 7, so that the energy storage capacitor 11 is controlled to work.

The starting button 3 and the foot control switch interface 9 are connected through a wire and are in parallel connection, and a starting instruction is sent to the PLC controller 7 through connection and disconnection. Meanwhile, the foot control switch interface 9 can be connected with a foot switch and a manipulator to send out a starting instruction, and is an external control interface of the equipment.

The power interface 8 is a 220V power interface, is a voltage total input interface of the whole equipment, and is connected with the power supply through a universal power line to supply power to the equipment. Is connected with a power switch 5 through a wire.

The power switch 55 is a main switch for supplying power to the device, and the 24V transformer 44, the rectifier transformer 14, and the cooling fan 18 supply power to the device.

The 24V transformer 44 converts 220V ac into 24V dc, and supplies power to the PLC controller 7, the pulse control board 2, and the welding solenoid valve 12 through wires.

The controllable energy storage capacitor connecting wire 10 is 2 copper bar wires and is connected with 4 controllable energy storage capacitors 11.

The controllable energy storage capacitors 11 are energy storage devices of the equipment, and total energy storage devices are 4. One end of the controllable energy storage capacitor connecting wire 10 is powered by the rectifier transformer 14, the other end of the controllable energy storage capacitor connecting wire is connected with the output welding ends 21 and 25, and the controllable energy storage capacitor connecting wire is controlled by the pulse control board 2 to work according to set parameters.

The triplet 13 is a device air source processor which regulates air pressure, filters compressed air and supplies lubrication oil to the pneumatic elements. Air is fed through the total air inlet port 24 and is output to the welding solenoid valve 12 and an external manual valve, and the diameter of the pipeline is 8mm.

The welding solenoid valve 12 is a gas path control element. The power is supplied by the 24V transformer 4 under the control of the PLC 7. Air intake is provided by the triple piece 13 and is output to an air inlet and outlet interface 22 (23) of the welding electromagnetic valve to perform welding cylinder work for the outside.

The rectifier transformer 14 converts alternating current 220V into direct current through rectification, and the controllable energy storage capacitor 11 is charged under the control of the pulse control board 2. And simultaneously, the discharging resistor 17 is connected to discharge the controllable energy storage capacitor 11 to reach set parameter voltage and current.

The cooling fan 18 delivers external cool air to the inside of the cabinet to cool the system.

The workbench 20 is an equipment placement platform for placing pulse welding tools; the work bench 19 is an equipment base frame; the casters 15 allow the device to move flexibly, with 4 groups; the welding element connecting plate 16 is a fixed platform of the controllable energy storage capacitor 11, the rectifier transformer 14 and the discharge resistor 17; the device foundation mounting frame is formed by connecting and fixing the device foundation mounting frame and the device foundation mounting frame through screws, and other parts are mounted according to drawings.

Working principle:

The device provides 220V power to the power switch 5 through the power connection wire 6; to the cooling fan 18, 24V transformer 4 and rectifier transformer 14, the corresponding voltages and currents are supplied to the device.

The 24V transformer 4 supplies power to the PLC controller 7, the pulse control board 2 and the welding electromagnetic valve 12 through wires.

The rectifier transformer 14 charges the controllable storage capacitor 11 via a wire. And simultaneously, the discharging resistor 17 is connected to discharge the controllable energy storage capacitor 11 to reach set parameter voltage and current.

In operation, the various devices above the source switch 5 are turned on to supply power in preparation for subsequent operations. The PLC 7 is used for setting parameters of each part to be welded, giving instructions to the pulse control plate 22, and simultaneously setting corresponding voltage values for the pulse control plate 2 by the pulse control plate adjusting knob 1. The pulse control board 2 controls the controllable energy storage capacitor 11 according to the set parameters, and charges and discharges the controllable energy storage capacitor 11 to reach the parameter set values through the rectifier transformer 14 and the discharge resistor 17, so that the preparation work is completed.

The pulse welding fixture is mounted to the work surface 20 and the pneumatic welding electrode 170 on the pulse welding fixture is connected to the output welding ends 21, 25 by dedicated welding wires. And simultaneously, the welding electromagnetic valve air inlet and outlet interfaces 22 (23) are connected to 2 interfaces of the working cylinder of the pneumatic welding electrode 170, so that the pulse welding tool and the pulse welding equipment are ready in place. The tool parts are mounted on corresponding tools, the manual valve is moved, the parts are clamped pneumatically, and the welding preparation work is completed.

Pressing the start button 3 (the foot control switch interface 9 can be connected with a foot switch and a manipulator to send a start command, which is an external control interface of the equipment), and sending a start signal to the PLC controller 7; the PLC 7 gives working instructions to the welding electromagnetic valve 12; a work instruction is given to the pulse control board 2; the pulse control board 2 gives working instructions to the controllable energy storage capacitor 11, the welding ends 21 and 25 are output to the pneumatic welding electrode 170 through welding wires, the pneumatic welding electrode 170 is connected with the part, and thus welding energy is output to the part to finish welding (the pulse welding equipment finishes the welding process within 0.1 s).

And loosening the tool and taking out the part. Meanwhile, the rectifier transformer 14 charges the controllable energy storage capacitor 11 through a wire, and the next welding preparation work is completed. So far, the whole pulse welding finishes the whole working cycle process once.

As an embodiment, the power supply device includes a power supply interface 8, a transformer 4, and a power switch 5;

The transformer 4 is installed in the cabinet body, the power interface 8 is externally connected with a power supply, and is connected with the power switch 5 through the power connection 6, the power switch 5 is electrically connected with the transformer 4, and the transformer 4 is electrically connected with the pulse control device, the pulse generating device and the PLC controller 7.

As an embodiment, the pulse control device comprises a pulse control board adjusting knob 1, a pulse control board 2, a start button 3 for sending a start command to a PLC controller 7, and a foot control switch interface 9;

The pulse control board adjusting knob 1 is electrically connected with the pulse control board 2 through a communication line of the PLC and the pulse control board 26, the pulse control board 2, the starting button 3 and the foot control switch interface 9 are electrically connected with the PLC 7, and the starting button 3 and the foot control switch interface 9 are connected in parallel.

As an embodiment, the pulse generating device comprises a controllable energy storage capacitor connecting wire 10, a controllable energy storage capacitor 11, a rectifier transformer 14, a discharge resistor 17, an output and welding end 21 (25);

The number of the controllable energy storage capacitors 11 is 4, one end of the controllable energy storage capacitor connecting wire 10 is electrically connected with the rectifier transformer 14, the other end of the controllable energy storage capacitor connecting wire 10 is electrically connected with the output and welding ends, the output welding end 21 (25) is electrically connected with the welding electrode of the pulse welding fixture, the discharge resistor 17 is electrically connected with the controllable energy storage capacitor 11, and the rectifier transformer 144, the discharge resistor 17 and the controllable energy storage capacitor 11 are arranged on the welding element connecting plate 16.

As an implementation manner, the gas circuit pipe fitting comprises a welding electromagnetic valve, a triple piece 13, a welding electromagnetic valve air inlet and outlet interface 22 (23) and a total air inlet interface 24;

The welding electromagnetic valve is electrically connected with the transformer 4, is in communication connection with the PLC controller 7, and the air inlet end of the welding electromagnetic valve is communicated with the total air inlet interface 24 through the triple piece 13, and the air outlet end of the welding electromagnetic valve is communicated with the pulse welding fixture through the welding electromagnetic valve air inlet and outlet interface 22 (23).

As an embodiment, the pulse welding fixture comprises a welding head 200, a mounting seat 110, a plurality of positioning blocks 140 for respectively positioning the multi-section pipeline to be welded, a welding electrode 170 and a plurality of pneumatic clamping devices 120 for clamping and fixing the multi-section pipeline to be welded;

The plurality of positioning blocks 140 are fixed on the mounting seat 110 according to the bending shape of the multi-section pipeline to be welded and the position to be welded, the plurality of pneumatic clamping devices 120 are mounted on the mounting seat 110, the plurality of pneumatic clamping devices 120 and the plurality of positioning blocks 140 are arranged at intervals, the welding electrode 170 is welded on the first pneumatic clamping device 120 and the last pneumatic clamping device 120, the plurality of welding heads 200 are arranged, the plurality of welding heads 200 are respectively mounted on the positioning blocks 140 corresponding to the position to be welded and are positioned between the first pneumatic clamping device 120 and the last pneumatic clamping device 120, and the welding electromagnetic valve air inlet and outlet interfaces 22 (23) are communicated with the pneumatic clamping devices.

Working principle:

the entire set of pulse welding jigs was attached to the pulse welding equipment table by 2M 8 screws to fix the bottom plate 115. The weld cable was attached to the welding electrode 170 with 2M 8 screws.

Each segmented part is mounted to a fixture and each segmented part positioning is adjusted. The manual valve is moved, the pneumatic clamping mechanism works, the parts are clamped pneumatically, and the parts preparation work is completed.

The pulse welding equipment is started, the pneumatic welding electrode 170 mechanism works, pulse welding electric energy is transmitted to two ends of the part through the welding cable and the welding electrode 170, and welding work is completed (the pulse welding equipment completes the welding process within 0.1 s).

And moving the manual valve, operating the pneumatic clamping mechanism, pneumatically loosening the parts, and taking out the parts welded into a whole. And cleaning the pulse welding clamp, so that the whole pulse welding clamp finishes the whole working cycle process once.

As an embodiment, the pneumatic clamping device 120 includes a welding fixture block 121, a cylinder fixture 122, and a clamping cylinder 123; the welding fixed block 121 is installed on the installation seat 110, a fixed groove is formed in the top of the welding fixed block 121, the air cylinder fixing seat 122 is installed on the welding fixed block 121, the clamping air cylinder 123 is installed on the air cylinder fixing seat 122, and the clamping air cylinder is communicated with the welding electromagnetic valve air inlet and outlet interface 22 (23).

The setting of welding fixed block 121, can be better with welding electrode 170 be connected fixedly, the fixed of treating the welded line has been realized to the setting of fixed slot, and cooperation clamp cylinder 123 realizes holding fixedly to the addition of treating the welded line after the installation, guarantees the stability of welded type treating the welded line, guarantees the welding effect.

As an implementation manner, the clamping cylinder 123 further comprises a clamping block 124 and a mounting column 125, the mounting end of the clamping block 124 is hinged to the output end of the clamping cylinder 123, two ends of the mounting column 125 are respectively hinged to the middle part of the clamping block 124 and the shell of the clamping cylinder 123, and the output end of the clamping cylinder 123 extends or retracts to drive the clamping block 124 to move downwards or upwards, so that the fixing groove is closed or opened. Further, the positioning blocks 140 are provided with limiting devices, and the positioning blocks 140 are arranged according to the bending shape of the multi-section pipeline to be welded. The setting of stop device has realized treating the fixed and the location of welded pipeline, adopts the form of height to arrange, more laminate the shape of buckling of treating welded pipeline, guarantees the welding effect.

The limiting device comprises two limiting columns, and the two limiting columns are arranged at the top of the positioning block 140. The two limit posts can realize the positioning of the pipeline to be welded. The positioning block 140 further comprises an arc-shaped guiding device, wherein the arc-shaped guiding device is arranged at the top of the positioning block 140 and is positioned between the two limiting posts. The arc guiding device is arranged, so that the outer wall of the pipeline to be welded can be better attached, the limiting effect is guaranteed, and the shaking of the pipeline to be welded is avoided. The guiding gradient of the arc-shaped guiding device is set according to the bending shape of the multi-section pipeline to be welded. The guiding gradient is set according to the bending shape of the pipeline to be welded, so that the contact effect of the positioning block 140 and the pipeline to be welded is ensured.

The clamping block 124 and the mounting column 125 are arranged, when the output end of the clamping cylinder 123 extends and retracts, the clamping block 124 can swing up and down under the cooperation of the mounting column 125, and then the pipeline to be welded after being placed is fixed. The clamping cylinder 123 is adopted, so that the control is convenient.

As one embodiment, the clamp further includes an end stop 160 and a pneumatic fixture 150; the end limiting device 160 and the pneumatic fixing device 150 are installed on the installation seat 110 and are located on the outer sides of the positioning blocks 140 and the pneumatic clamping devices 120, the end limiting device 160 and the pneumatic fixing device 150 are abutted against two ends of the multi-section pipeline to be welded, and the pneumatic fixing device 150 is communicated with the welding electromagnetic valve air inlet and outlet interface 22 (23).

The end limiting device 160 and the pneumatic fixing device 150 are arranged, so that pneumatic clamping is carried out on the pipeline to be welded at two ends of the pipeline to be welded after the pipeline to be welded is arranged on the positioning block 140, and the contact effect among the multiple sections of pipelines to be welded is guaranteed. The pneumatic fixing device 150 adopts an air cylinder, a hydraulic cylinder or other devices capable of realizing holding and fixing, the pneumatic fixing device 150 can be arranged on the welding fixing block 121, and the output end of the pneumatic fixing device 150 abuts against one end of a pipeline to be welded after the pneumatic fixing device stretches out.

As an embodiment, the end limiting device 160 further includes a guide post, where the guide post is installed on the end limiting device 160, and when the multi-section pipeline to be welded is installed on the fixture, the guide post is inserted into one end of the multi-section pipeline to be welded facing the end limiting device.

The guide post is arranged, so that the pipeline to be welded at the initial section is fixed and positioned.

As one embodiment, the mount 110 includes a base plate 115 and an insulating plate 116; an insulating plate 116 is mounted on the base plate 115, and a plurality of positioning blocks 140 and a plurality of pneumatic clamping devices 120 are mounted on the insulating plate 116.

The fixed bottom plate 115 is made of A3 steel, and is subjected to surface galvanization treatment, and mainly plays a role in installation and connection. The pulse welding equipment workbench is connected through 2M 8 screws, and the insulating plate 116 is connected through 4M 6 screws, so that the insulating plate 116 is prevented from deforming.

Insulation plate 116 is a core component of the present utility model and renders the components mounted thereon non-conductive. The material is a non-conductive, easy-to-process and non-deformable POM plate, nylon plate, bakelite plate, polytetrafluoroethylene plate and the like. According to the different positions of each part design, positioning pin holes and screws are processed through numerical control.

In the description of the above embodiments, particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

Of course, various changes and substitutions can be made to the above description, and all such changes and substitutions are intended to be within the spirit and scope of the utility model. Therefore, the utility model should not be limited, except as by the appended claims and equivalents thereof.

Claims

1. The pulse welding device is characterized by comprising a cabinet body, a power supply conversion device, a pulse control device, a pulse generation device, a PLC (programmable logic controller), an air passage pipe fitting and a pulse welding clamp for pneumatically clamping and welding a welding pipeline;

2. The pulse welding device of claim 1, wherein the power switching device comprises a power interface, a transformer, and a power switch;

The transformer is installed in the cabinet body, the power interface is externally connected with a power supply and is connected with the power switch through a power connection wire, the power switch is electrically connected with the transformer, and the transformer is electrically connected with the pulse control device, the pulse generation device and the PLC.

3. The pulse welding device of claim 2, wherein the pulse control device comprises a pulse control board adjustment knob, a pulse control board, and a start button and foot control switch interface for sending start instructions to the PLC controller;

The pulse control board adjusting knob is electrically connected with the pulse control board through a PLC controller and a pulse control board communication line, the pulse control board, the starting button and the foot control switch interface are electrically connected with the PLC controller, and the starting button and the foot control switch interface are connected in parallel.

4. The pulse welding apparatus of claim 3, wherein the pulse generating means comprises a controllable energy storage capacitor connecting line, a controllable energy storage capacitor, a rectifier transformer, a discharge resistor, an output and a welding end,

The controllable energy storage capacitors are 4, one end of each controllable energy storage capacitor connecting wire is connected with the corresponding rectifier transformer, the other end of each controllable energy storage capacitor connecting wire is electrically connected with the output end and the welding end, the output welding end is electrically connected with the welding electrode of the pulse welding fixture, the discharging resistor is electrically connected with the corresponding controllable energy storage capacitor, and the corresponding rectifier transformer, the discharging resistor and the corresponding controllable energy storage capacitor are mounted on the welding element connecting plate.

5. The pulse welding device of claim 4, wherein the gas line tubing comprises a welding solenoid valve, a triplet, a welding solenoid valve air inlet and outlet port, a total air inlet port;

The welding electromagnetic valve is electrically connected with the transformer and is in communication connection with the PLC, the air inlet end of the welding electromagnetic valve is communicated with the total air inlet interface through the triple piece, and the air outlet end of the welding electromagnetic valve is communicated with the pulse welding fixture through the air inlet and outlet interface of the welding electromagnetic valve.

6. The pulse welding device according to claim 5, wherein the pulse welding fixture comprises a mounting seat, a plurality of positioning blocks for positioning the multi-section pipeline to be welded respectively, two welding electrodes and a plurality of pneumatic clamping devices for clamping and fixing the multi-section pipeline to be welded;

The welding device comprises a mounting seat, a plurality of pneumatic clamping devices, a plurality of welding electrodes, a plurality of welding heads, a plurality of electromagnetic valve air inlet and outlet interfaces and a plurality of pneumatic clamping devices, wherein the plurality of positioning blocks are fixed on the mounting seat according to the bending shape of a multi-section pipeline to be welded and the position to be welded, the plurality of pneumatic clamping devices are arranged on the mounting seat, the plurality of pneumatic clamping devices and the plurality of positioning blocks are arranged at intervals, one end of each welding electrode is welded on the two pneumatic clamping devices at the beginning and the end, the other end of each welding electrode is connected with the output and welding end, the plurality of welding heads are respectively arranged on the positioning blocks corresponding to the position to be welded and are positioned between the two pneumatic clamping devices at the beginning and the end, and the welding electromagnetic valve air inlet and outlet interfaces are communicated with the pneumatic clamping devices.

7. The pulse welding device of claim 6, wherein the pneumatic clamping device comprises a weld fixture block, a cylinder mount, and a clamping cylinder;

The welding fixture block is installed on the mounting seat, the top of the welding fixture block is provided with a fixing groove, the cylinder fixing seat is installed on the welding fixture block, the clamping cylinder is installed on the cylinder fixing seat, and the clamping cylinder is communicated with the air inlet and outlet interface of the welding electromagnetic valve.

8. The pulse welding device according to claim 7, wherein the clamping cylinder further comprises a clamping block and a mounting column, the mounting end of the clamping block is hinged to the output end of the clamping cylinder, two ends of the mounting column are respectively hinged to the middle part of the clamping block and the shell of the clamping cylinder, and the output end of the clamping cylinder stretches out or retracts to drive the clamping block to move downwards or upwards to close or open the fixing groove.

9. The pulse welding device of claim 6, wherein the clamp further comprises an end stop and a pneumatic securing device;

The end limiting device and the pneumatic fixing device are arranged on the mounting seat and are positioned on the outer sides of the positioning blocks and the pneumatic clamping devices, and the end limiting device and the pneumatic fixing device are abutted against two ends of the multi-section pipeline to be welded.

10. The pulse welding device of claim 9, wherein the end stop further comprises a guide post mounted on the end stop, the guide post being inserted into an end of the multi-segment pipe to be welded facing the end stop when the multi-segment pipe to be welded is mounted on the clamp.