CN219852566U

CN219852566U - Automatic welding gun

Info

Publication number: CN219852566U
Application number: CN202320592470.6U
Authority: CN
Inventors: 雷超; 王玮
Original assignee: Chengdu Ruibo Electric Industrial Co ltd
Current assignee: Chengdu Ruibo Electric Industrial Co ltd
Priority date: 2023-03-23
Filing date: 2023-03-23
Publication date: 2023-10-20
Anticipated expiration: 2033-03-23

Abstract

The utility model relates to an automatic welding gun, which comprises a plurality of groups of automatic welding units which are arranged adjacently in parallel, wherein the automatic welding units respectively finish the spot welding tasks of different welding spots of a fuel rod, one side of each automatic welding unit is also provided with an XY sliding table for controlling the movement of a workpiece to be welded and a control unit for controlling the automatic welding unit and the XY sliding table, the control unit is internally provided with an automatic welding program, so that the position of an XY axis on the horizontal plane of the fuel rod can be adjusted through the XY sliding table, and the inner large welding spot, the inner welding spot and the edge small welding spot at the end part of the fuel rod are respectively welded through the adjacent automatic welding units.

Description

Automatic welding gun

Technical Field

The utility model relates to the technical field of welding equipment, in particular to an automatic welding gun.

Background

The electric welding gun uses the high current and high voltage of the welding machine to gather at the welding gun terminal, melt the welding wire, the melted welding wire permeates to the part to be welded, after cooling, the welded objects are firmly connected into a whole, the use of the electric welding gun is more and more widespread nowadays, and the electric welding gun is often an indispensable tool especially in the production or maintenance process of electrical equipment.

In the utility model, as shown in FIG. 10, three welding spots of 'inner big welding spot', 'inner welding spot', 'edge small welding spot' are distributed at the end part of the fuel rod, wherein interference objects do not exist around the 'inner big welding spot', the section of the electrode is circular, and the diameter is about phi 2mm; the internal welding spots are distributed between the arc interlayers of the fuel rod, clamping plates are arranged on two sides of the arc interlayer to interfere, the section of the electrode is elliptical, and the size is about 2mm multiplied by 1.5mm; the edge small welding spots are arranged on the periphery of the clamping plate, the welding area is small, the section of the electrode is circular, and the diameter is about phi 1mm; for the above three welding spots, referring to fig. 4, in the conventional welding method, an operator uses manual welding guns with different welding electrodes to respectively spot-weld the welding spots, which has problems of low welding efficiency and low welding quality.

The above information disclosed in the background section is only for enhancement of understanding of the background art from the technology described herein and, therefore, may contain some information that does not form the prior art that is already known in the country to a person of ordinary skill in the art.

Disclosure of Invention

Therefore, in view of the technical problems in the prior art, it is desirable to provide an automatic welding gun structure that is suitable for a fuel rod positioning clamping plate and can realize mechanical replacement of manual work.

The technical scheme adopted by the utility model is as follows:

an automatic welding gun, comprising: and the plurality of groups of automatic welding units are adjacently arranged in parallel and respectively finish the spot welding tasks of different welding spots of the fuel rod, each automatic welding unit comprises an upper clamping arm and a lower clamping arm, one end of the upper clamping arm is provided with a first electrode, one end of the lower clamping arm corresponding to the first electrode is provided with a second electrode, a part to be welded is positioned between the first electrode and the second electrode, and one side of the upper clamping arm, which is far away from the first electrode, is also provided with a driving structure for driving the first electrode to be close to the second electrode.

In a specific technical scheme, the driving structure comprises a lever bracket arranged in the middle of the upper clamping arm and a first air cylinder arranged at the lower side of one end of the upper clamping arm, which is far away from the first motor, wherein the lever bracket is fixedly arranged on the first table top, the upper clamping arm is rotationally connected with the top of the lever bracket, the first air cylinder is fixedly arranged on the first table top, the end part of a piston of the first air cylinder is hinged with the end part of the upper clamping arm, and the first air cylinder drives a first electrode at the end part of the upper clamping arm to perform circular arc motion.

Further on the basis of the technical scheme, a dynamometer is further arranged between the piston end part of the first air cylinder and the end part of the upper clamping arm, the piston end part of the first air cylinder is fixedly connected with a first connecting rod, the first connecting rod is fixedly connected with the bottom of the dynamometer, the end part of the upper clamping arm is hinged with a second connecting rod, and one end of the second connecting rod, far away from the upper clamping arm, is fixedly connected with the top of the dynamometer.

In the specific technical scheme, lower arm lock is vertical direction installation, and the bottom of lower arm lock is provided with the second cylinder, and the second cylinder sets firmly on the second mesa, and the piston tip of second cylinder and the bottom fixed connection of lower arm lock, its second cylinder drive the second electrode of lower arm lock tip and carry out vertical up-and-down motion.

On the basis of the technical scheme, the height of the second table top is lower than that of the first table top.

On the basis of the technical scheme, one side of the automatic welding unit is further provided with an XY sliding table for controlling the movement of the workpiece to be welded.

In summary, due to the adoption of the technical scheme, the beneficial effects of the utility model are as follows:

compared with the manual welding gun welding mode in the prior art, in the technical scheme, by arranging three groups of parallel adjacent automatic welding units and respectively installing different welding electrodes, the welding tasks of three welding spots including an internal large welding spot, an internal welding spot and an edge small welding spot on a workpiece to be welded can be realized; each automatic welding unit comprises an upper clamping arm and a lower clamping arm, the end parts of the upper clamping arm and the lower clamping arm are respectively provided with a first electrode and a second electrode, a space is reserved between the first electrode and the second electrode in an initial state for a workpiece to be welded to enter, after the workpiece to be welded is in place, the second electrode moves upwards under the driving of the second cylinder, the first motor moves downwards clockwise under the driving of the first cylinder, the two electrodes are in contact with welding spots, an automatic welding task is carried out, the lower clamping arm is loosened after the welding spots of the first part are completed, the workpiece is brought to the position of the next welding spot by the XY sliding table, and the welding process is repeated. The automatic welding gun provided by the utility model can realize automatic welding of different welding spots of the workpiece to be welded, replaces manual work and improves the overall efficiency.

Drawings

The utility model will now be described by way of example and with reference to the accompanying drawings in which:

FIG. 1 is a schematic view showing a welding state of a fuel rod at an automatic welding unit A in an embodiment of the present utility model;

FIG. 2 is a schematic view showing a welding state of a fuel rod at an automatic welding unit B in an embodiment of the present utility model;

FIG. 3 is a schematic view showing a welding state of a fuel rod at an automatic welding unit C in an embodiment of the present utility model;

FIG. 4 is a schematic view of a conventional manual welding gun in the prior art;

FIG. 5 is a schematic view showing a structure of an XY slipway in one embodiment of the present utility model;

FIG. 6 is a schematic view showing the state of an automatic welding gun in the welding step 1 according to an embodiment of the present utility model;

FIG. 7 is a schematic view showing the state of the automatic welding gun in the welding step 2 according to an embodiment of the present utility model;

FIG. 8 is a schematic view showing the state of an automatic welding gun in the welding step 3 according to an embodiment of the present utility model;

FIG. 9 is a schematic view showing the state of the automatic welding gun in the welding step 4 according to an embodiment of the present utility model;

FIG. 10 is a schematic illustration of the configuration of a fuel rod end weld in one embodiment of the utility model.

Reference numerals:

an automatic welding unit A-1; an automatic welding unit B-2; an automatic welding unit C-3;

an upper clamping arm-4; a lower clamp arm-5;

a first electrode-6; a second electrode-7; lever bracket-8;

a first cylinder-9; a first mesa-10; a load cell-11;

a second cylinder-12; a second mesa-13; y-axis sliding table-14;

y-axis guide rail-15; x-axis sliding table-16; x-axis guide rail-17; a manual welding gun-18;

inner large welding spots-19; an internal welding spot-20; edge small spot welds-21.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by a person skilled in the art without making any inventive effort, are intended to be within the scope of the present utility model.

In describing embodiments of the present utility model, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. refer to an azimuth or a positional relationship based on that shown in the drawings, or that the inventive product is conventionally put in place when used, merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

The present utility model will be described in detail with reference to fig. 1 to 10.

An automatic welding gun, referring to fig. 1, 2, 3, 10, comprising: the automatic welding unit of array that side by side set up accomplishes the spot welding task of the different solder joints of fuel rod respectively, one side of automatic welding unit still is provided with the XY slip table that control wait to weld the work piece and removes and controls the automatic welding unit and the control unit of XY slip table, establish automatic welding procedure in the control unit, make the fuel rod pass through XY slip table and can adjust the position of XY axle on its horizontal plane, inside big solder joint 19 of fuel rod tip, inside solder joint 20 and marginal little solder joint 21 weld through adjacent automatic welding unit respectively, through the device, realize the automatic positioning and the automatic weld of solder joint, compared with traditional manual welder 18 welded mode, welding precision and success rate have been promoted, the manual work has been replaced, and overall efficiency has been promoted.

In a specific embodiment, referring to fig. 1, 2, 3 and 10, according to three different welding spots of an "inner big welding spot 19", "an" inner welding spot 20 "and an" edge small welding spot 21 "at the end of a fuel rod, the automatic welding units are arranged into three groups, named as an automatic welding unit A1, an automatic welding unit B2 and an automatic welding unit C3, each automatic welding unit comprises an upper clamping arm 4 and a lower clamping arm 5, a first electrode 6 is installed at one end of the upper clamping arm 4, the first electrode 6 is an anode, a second electrode 7 is installed at the corresponding end of the lower clamping arm 5, the second electrode 7 is a cathode, the first electrode 6 and the second electrode 7 in the three groups of automatic welding units are of different types according to the characteristics of the welding spots, a driving structure for driving the first electrode 6 to approach the second electrode 7 is further arranged at one side of the upper clamping arm 4 far from the first electrode 6, and when the welding spot at the end of the fuel rod moves to the position right above the second electrode 7, the first electrode 6 and the second electrode 7 are made to approach each other by the driving structure, and the welding operation of the first electrode 6 and the second electrode 7 is made to approach each other.

Wherein, the periphery of the 'inner large welding spot' has no interference object, the section of the electrode is circular, and the diameter is about phi 2mm. The internal welding spots are distributed between the arc interlayers of the fuel rod, clamping plates are arranged on two sides of the arc interlayer to interfere, the section of the electrode is elliptical, and the size is about 2mm multiplied by 1.5mm. The edge small welding spots are arranged on the periphery of the clamping plate, the welding area is small, the section of the electrode is circular, and the diameter is about phi 1mm.

In a specific embodiment, referring to fig. 6, 7, 8 AND 9, the driving structure includes a lever bracket 8 disposed in the middle of the upper clamping arm 4, AND a first cylinder 9 disposed at the lower side of one end of the upper clamping arm 4 far away from the first motor, where the first cylinder 9 is an AND-S-50-40-I-P-a compact small-bore cylinder of FESTO; the lever bracket 8 is fixedly arranged on the first table top 10, the upper clamping arm 4 is rotationally connected with the top of the lever bracket 8, the first air cylinder 9 is fixedly arranged on the first table top 10, the piston end of the first air cylinder 9 is hinged with the end of the upper clamping arm 4, one end, far away from the first electrode 6, of the upper clamping arm 4 is lifted upwards by the output end of the first air cylinder 9, and one end of the first electrode 6 of the upper clamping arm 4 performs circular arc motion clockwise under the action of the lever bracket 8.

In a specific embodiment, referring to fig. 6, a load cell 11 is further disposed between the piston end of the first cylinder 9 and the end of the upper arm 4, the load cell 11 is a model LH-Z05A with a constant Shanghai force, and the load cell 11 is electrically connected to the control unit for measuring the welding pressure and feeding it back to the control unit. The pressing force in the welding process is adjustable, the pressure is stable, the pressure jumping in the pressure maintaining process is not more than 5%, and in addition, the pressing force is convenient to verify or calibrate; the pressing force is transmitted to the PLC to be displayed on the control panel through the pressure sensor acquisition by the lever type cylinder mechanism inside the welding gun. In a specific structure, a first connecting rod is fixedly connected to the end part of the piston of the first cylinder 9, the first connecting rod is fixedly connected with the bottom of the dynamometer 11, a second connecting rod is hinged to the end part of the upper clamping arm 4, and one end of the second connecting rod, far away from the upper clamping arm 4, is fixedly connected with the top of the dynamometer 11.

In a specific embodiment, referring to fig. 6, the lower clamping arm 5 is installed in a vertical direction, a second cylinder 12 is disposed at the bottom of the lower clamping arm 5, the second cylinder 12 is an AND-80-50-I-P-a large-diameter cylinder of FESTO, the second cylinder 12 is fixedly disposed on a second table top 13, the height of the second table top 13 is lower than that of the first table top 10, the piston end of the second cylinder 12 is fixedly connected with the bottom of the lower clamping arm 5, AND the second cylinder drives the second electrode 7 at the end of the lower clamping arm 5 to vertically move up AND down.

In one specific embodiment of the present utility model,

the XY workpiece sliding table realizes the positioning movement of the welding workpiece in the horizontal plane X, Y direction, and two sets of Siemens SINAMICS V servo drivers and 1FL6 servo motors are adopted to select the accurate movement of the absolute value encoder to the sliding table so as to realize the accurate positioning of welding spots on the workpiece relative to welding gun electrodes. The servo driver with PROFIdrive function is connected with the PLC in a direct PN mode, so that the functions of seamless integration, synchronous configuration and unified operation are achieved. The closed loop control cycle time reaches a period of 2ms, so that the accuracy and stability of the positioning function are ensured.

Referring to fig. 5, the XY slipway is composed of a plurality of groups of screw rods, guide rails and servo motors, and comprises a Y-axis slipway 14 for fixing a workpiece to be welded, a Y-axis guide rail 15 is connected below the Y-axis slipway 14, the Y-axis guide rail 15 is arranged on an X-axis slipway 16, an X-axis guide rail 17 is connected below the X-axis slipway 16, and the X-axis slipway 16 and the Y-axis slipway 14 are driven by screw rod motor mechanisms; it should be noted that, the screw motor mechanism related in this embodiment is a technology known to those skilled in the art, and the screw is driven by a motor to rotate, a nut is sleeved on the screw, the nut is slidably connected in the chute, the screw rotates to drive the screw nut to reciprocate along the chute, and the screw nut is fixedly connected with the corresponding X-axis sliding table 16 and the corresponding Y-axis sliding table 14, so as to achieve the purpose of driving the X-axis sliding table 16 and the Y-axis sliding table 14 to move along the corresponding guide rails. The screw rod is of the model HIWIN1R20-2B2-PFDWE 1-1000-1200-0.01-D; the X-axis guide rail 17 and the Y-axis guide rail 15 are HGH35CA4R1500Z0SPII of HIWIN.

In a specific embodiment, the control unit adopts a Siemens S7-1500T PLC main controller, and has the characteristics of excellent performance, various integrated processes, safety and stability. The system contains rich communication capability of Profinet IO, supports isochronous RT and IRT communication, has the capability of rapidly processing signals, and centrally manages logic control of each path of unit. Siemens S7-1500T can be connected with a driver with a PROFIdrive function in a transmission unit with a motion control function, and can be seamlessly integrated into TIA Portal V17 to carry out synchronous configuration and unified operation, and a flexible programming mode is adopted, so that TIA Portal mature and reliable programming language is applied. The control panel adopts a set of Siemens SIMATIC KTP PN to configure a TFT true color liquid crystal screen. 64K color, 1280 x 800 resolution, 10M user memory, ethernet interface support, 800 variables, 100 pictures, 10 function buttons, TIA software programming support.

The working principle is as follows:

step 1: the master PLC controller centrally manages the sequential execution process of all units, and when in automatic welding, the servo motor accurately moves the welding spots of the workpieces of the XY slipway to the welding gun electrode of the automatic welding unit A1;

step 2: the second cylinder 12 controls the second electrode 7 to jack up the workpiece upwards for positioning;

step 3: the first cylinder 9 controls the first electrode 6 to downwards press the workpiece to measure the pressing force, and starts the welding machine to finish welding spots;

step 4: after the welding of the inner large welding spot 19 is finished, the upper clamping arm 5 and the lower clamping arm 5 are loosened, the workpiece is brought to the position of the next welding spot by the XY sliding table, the process is repeated, and the welding of the inner welding spot 20 and the edge small welding spot 21 is finished in the automatic welding unit C3 of the automatic welding unit B2 in sequence.

In the welding process, the control panel displays the state of the pressing force and the pressure maintaining time in real time, key parameters of the welding machine are on a computer interface, and the welding current can be adjusted. And abnormal self-diagnosis and alarm occur in the operation process, so that the safe and stable operation of the equipment is ensured.

It should be noted that, in the present utility model, no improvement of software method program is involved, the corresponding methods and algorithms involved in the embodiments are all of the prior art, and those skilled in the art can implement according to the descriptions of the prior art, and only improvement and protection on mechanical structure are involved.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

The above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims

1. An automatic welding gun, comprising: and the plurality of groups of automatic welding units are adjacently arranged in parallel and respectively finish the spot welding tasks of different welding spots of the fuel rod, each automatic welding unit comprises an upper clamping arm and a lower clamping arm, one end of the upper clamping arm is provided with a first electrode, one end of the lower clamping arm corresponding to the first electrode is provided with a second electrode, a part to be welded is positioned between the first electrode and the second electrode, and one side of the upper clamping arm, which is far away from the first electrode, is also provided with a driving structure for driving the first electrode to be close to the second electrode.

2. The automatic welding gun according to claim 1, wherein the driving structure comprises a lever bracket arranged in the middle of the upper clamping arm and a first air cylinder arranged at the lower side of one end of the upper clamping arm far away from the first motor, the lever bracket is fixedly arranged on the first table top, the upper clamping arm is rotationally connected with the top of the lever bracket, the first air cylinder is fixedly arranged on the first table top, the end part of the piston of the first air cylinder is hinged with the end part of the upper clamping arm, and the first air cylinder drives the first electrode at the end part of the upper clamping arm to perform circular arc motion.

3. The automatic welding gun according to claim 2, wherein a dynamometer is further arranged between the piston end of the first cylinder and the end of the upper clamping arm, the piston end of the first cylinder is fixedly connected with a first connecting rod, the first connecting rod is fixedly connected with the bottom of the dynamometer, the end of the upper clamping arm is hinged with a second connecting rod, and one end of the second connecting rod, which is far away from the upper clamping arm, is fixedly connected with the top of the dynamometer.

4. The automatic welding gun according to claim 1, wherein the lower clamping arm is installed in the vertical direction, a second air cylinder is arranged at the bottom of the lower clamping arm and fixedly arranged on the second table top, the piston end part of the second air cylinder is fixedly connected with the bottom of the lower clamping arm, and the second air cylinder drives the second electrode at the end part of the lower clamping arm to vertically move up and down.

5. The automatic welding gun of claim 4, wherein the second table top is lower than the first table top.