Intelligent welding device for water heater inner container and welding method of intelligent welding device

Abstract

The invention is suitable for the field of metal plate welding, and provides an intelligent welding device for a water heater inner container and a welding method thereof.The intelligent welding device comprises a base table plate, two compaction rollers are arranged on the outer side of a metal plate and connected to an annular torsion mechanism, and a heating assembly is arranged in a mold cylinder; a gap butt joint assembly is arranged at the top end of the die cylinder, and a machining assembly is arranged above the metal plate. When the metal plate processing device is used, a metal plate to be processed is stuffed between the mold cylinder and the two compaction rollers, at the moment, the second compaction motor drives the center shaft and the zigzag rod to start forward torsion, and the first compaction motor drives the crankshaft and the zigzag pipe to start reverse torsion; when the zigzag pipe and the zigzag rod are twisted to the position above the die cylinder by hanging the two compaction rollers, the sheet metal can be twisted by a circle to be in a cylinder shape, a gap is reserved between the two edges of the sheet metal, manual operation is not needed for rolling and shaping of the device, the labor cost is reduced, and therefore the function of automatically rolling the sheet metal is achieved.

Description

Technical Field

[0001] The invention belongs to the field of sheet metal welding, and in particular relates to an intelligent welding device for a water heater inner tank and a welding method thereof. Background Art

[0002] With the development of industrial technology, modern sheet metal welding technology has become more and more perfect. The inner tank of the water heater needs to be rolled and welded during manufacturing. In the past, welding operations required manual participation of workers, which would increase labor costs. In addition, sheet metal handling operations are prone to injuring workers.

[0003] Secondly, the welds produced by the previous welding method of the inner tank of the water heater are prone to leakage after a long period of corrosion. After the welds are corroded to a certain extent, they are prone to cracking and breaking. Summary of the invention

[0004] The purpose of the present invention is to address the deficiencies in the prior art and to provide an intelligent welding device and a welding method for a water heater inner tank. When the device is in use, the sheet metal to be processed is inserted between the mold cylinder and the two compacting rollers. At this time, the second compacting motor drives the central axis and the bending rod to start forward twisting, and the first compacting motor drives the crankshaft and the bending tube to start reverse twisting. When the bending tube and the bending rod are mounted with two compacting rollers and twisted to the top of the mold cylinder, the sheet metal will be twisted into a cylindrical shape with a gap between the two edges of the sheet metal. The heating wire starts to energize and heat the sheet metal. After being heated, the sheet metal will be shaped and its resilience will be reduced. The rolling and plasticity of the device do not require manual operation, which reduces labor costs, thereby solving the problems mentioned in the background technology.

[0005] In order to solve the above problems, the present invention provides the following technical solutions: an intelligent welding device for a water heater inner tank, comprising a base plate, a mold cylinder is arranged above the base plate, a cantilever arm is arranged at the rear end of the mold cylinder, the cantilever arm is fixedly connected to the top surface of the base plate through a grounding flange, a sheet metal piece is arranged on the outside of the mold cylinder, and a docking groove is cut out at the edge of the sheet metal piece; two compacting rods are arranged on the outside of the sheet metal piece, and the compacting rods are connected to an annular torsion mechanism, a heating component is arranged inside the mold cylinder, and a gap docking component is arranged at the top of the mold cylinder. A processing component is arranged above the sheet metal piece; the annular torsion mechanism includes a vertical plate on the side wall of the cantilever beam arm, an extension plate is arranged on the side wall of the vertical plate, a first compaction motor and a second compaction motor are fixedly mounted on the side wall of the extension plate, a bending tube is rotatably arranged at the top end of the vertical plate, a bending rod is rotatably arranged at the center of the bending tube, a crankshaft is arranged at the rear end head of the bending tube, a center shaft is arranged at the rear end head of the bending rod, the crankshaft is connected to the output shaft of the first compaction motor, the center shaft is connected to the output shaft of the center shaft, and two compaction rollers are respectively mounted on the bending tube and the bending rod.

[0006] Furthermore, the heating component includes a rectangular groove on the outer side of the mold barrel side wall, a heating wire is placed in the rectangular groove, an arc-shaped cover plate is installed at the opening of the rectangular groove, and the arc-shaped cover plate and the outer arc surface of the mold barrel are kept flush.

[0007] Furthermore, the gap docking assembly includes a notch at the top of the mold tube, the edge of the notch at the top of the mold tube is provided with a hinge line groove, two expansion tiles are provided in the middle of the notch at the top of the mold tube, the edge of the expansion tile is provided with a hinge strip matching the hinge line groove, the outer arc surface of the expansion tile is kept flush with the outer arc surface of the mold tube, and an indentation power mechanism is provided on the inner side of the expansion tile.

[0008] Furthermore, the inward power mechanism includes an elastic sheet on the inner side wall of the expansion shoe, an expansion spring is arranged on the opposite surface of the elastic sheet, a slope surface is arranged on the opposite surface of the elastic sheet, a hydraulic press is fixedly installed on the bottom end of the mold cylinder, a forked rod is arranged at the output end of the hydraulic press, and the ends of the forked rod are both provided with, which abut against the slope at the bottom end of the elastic sheet.

[0009] Furthermore, the slope of the slope surface of the elastic sheet at the left end is greater than the slope of the slope surface of the elastic sheet at the right end.

[0010] Furthermore, the processing component includes a cantilever plate at the top of the mold cylinder, a reserved groove is arranged in the middle of the cantilever plate, two guide rails are arranged on the bottom surface of the cantilever plate, a positioning slider is arranged on the guide rail, a loading platform is arranged at the bottom end of the positioning slider, the loading platform is divided into two left and right parts, a positioning horizontal axis is rotatably arranged in the middle of the left and right loading platforms, the positioning horizontal axis is installed on the output shaft of the stepper motor, a positioning turntable is arranged on the outside of the positioning horizontal axis, three extension arms are arranged on the outside of the positioning turntable, and a mounting plate is arranged at the end of the extension arm, a grooving assembly, a compacting assembly and a welding assembly are respectively arranged on the three mounting plates, and the loading platform is connected to the linear propulsion assembly.

[0011] Furthermore, the grooving assembly includes two cutting machines on a mounting plate, a thin rod is provided at the output end of the cutting machine, a saw blade is provided at the end of the thin rod, the height of the front cutting machine is greater than that of the rear cutting machine, and the front cutting machine is positioned to the left of the rear cutting machine by a distance.

[0012] Furthermore, the compaction assembly includes a shaping frame on a mounting plate, a shaping rod is rotatably arranged in the middle of the shaping frame, the cross-section of the shaping rod matches the cross-section of the expansion tile, the diameter of the left half of the shaping rod is smaller than the diameter of the right half of the shaping rod, and the welding assembly includes a welding machine on the side wall of the mounting plate.

[0013] Furthermore, the linear propulsion assembly includes a servo motor on the side wall of the cantilever beam plate, a screw rod is installed at the output end of the servo motor, and a nut block mounted on the screw rod is arranged on the side wall of the guide rail.

[0014] Further, the following steps are included:

[0015] S1. Insert the sheet metal to be processed between the mold barrel and the two compacting rollers. At this time, the second compacting motor drives the central shaft and the bending rod to start forward twisting, and the first compacting motor drives the crankshaft and the bending tube to start reverse twisting. When the bending tube and the bending rod are mounted with the two compacting rollers and twisted to the top of the mold barrel, the sheet metal will be twisted into a cylindrical shape with a gap between the two edges of the sheet metal. The electric heating wire starts to energize and heat the sheet metal. After being heated, the sheet metal will be shaped and its resilience will be reduced;

[0016] S2. The servo motor drives the stage to move horizontally through the lead screw and nut block, and then the stage moves back and forth along the track of the guide rail. At this time, the stepper motor drives the positioning turntable to rotate so that the cutting machine moves vertically downward. When the saw blade at the output end of the cutting machine passes through the gap of the sheet metal, it can cut a docking groove;

[0017] S3. The hydraulic press drives the bifurcated rod to retract downward for a distance, and the expansion spring drives the elastic sheet to expand to both sides, and then the expansion pad begins to twist downward and concave. The concave torsion angle of the left expansion pad is greater than the concave torsion angle of the right expansion pad. After the two expansion pads are concave, the total circumference of the mold barrel and the expansion pad can be reduced. The shaping rod is twisted downward and rolled on the docking groove, and then the docking grooves can be staggered and docked together. The welding machine is twisted downward and slides along a straight line on the docking groove to perform welding operations.

[0018] Compared with the prior art, the embodiments of the present application have the following beneficial effects:

[0019] Firstly, when the device is in use, the sheet metal to be processed is inserted between the mold cylinder and the two compacting rollers. At this time, the second compacting motor drives the central axis and the bending rod to start forward twisting, and the first compacting motor drives the crankshaft and the bending tube to start reverse twisting. When the bending tube and the bending rod are mounted with two compacting rollers and twisted to the top of the mold cylinder, the sheet metal will be twisted into a cylindrical shape with a gap between the two edges of the sheet metal. The heating wire starts to energize and heat the sheet metal. After being heated, the sheet metal will be shaped and its resilience will be reduced. The rolling and plasticity of the device do not require manual operation, thereby reducing labor costs.

[0020] Secondly, the servo motor drives the stage to translate through the lead screw and the nut block, and then the stage will move back and forth in a straight line along the track of the guide rail. At this time, the stepper motor drives the positioning turntable to twist so that the cutting machine moves vertically downward. When the saw blade at the output end of the cutting machine passes through the gap of the sheet metal, it can cut a docking groove. The hydraulic press drives the forked rod to retract downward for a distance, and the expansion spring drives the elastic sheet to expand to both sides, and then the expansion tile begins to twist downward and concave. The concave torsion angle of the left expansion tile is greater than the concave torsion angle of the right expansion tile. After the two expansion tiles are concave, the total circumference of the mold barrel and the expansion tile can be reduced. The shaping stick is twisted downward and rolled on the docking groove, and then the docking grooves can be staggered and docked together. The welding machine is twisted downward and slides along a straight line on the docking groove to perform welding operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the front view of the present invention.

[0022] Figure 2 It is a schematic diagram of a side view of the present invention.

[0023] Figure 3 Schematic diagram of the sheet metal piece of the present invention.

[0024] Figure 4 It is a schematic diagram of a cross-section of the present invention.

[0025] Figure 5 It is a schematic diagram of the vertical plate of the present invention.

[0026] Figure 6 It is a schematic diagram of the mold cylinder of the present invention.

[0027] Figure 7 Schematic diagram of the elastic sheet of the present invention.

[0028] Figure 8 It is a schematic diagram of the cantilever beam plate of the present invention.

[0029] Fig. 9 Schematic diagram of the servo motor of the present invention.

[0030] Fig.10 It is a schematic diagram of the positioning turntable of the present invention.

[0031] Description of reference numerals:

[0032] Base plate 1, cantilever arm 2, grounding flange 201, mold cylinder 3, arc cover plate 301, heating wire 302, sheet metal plate 4, docking groove 401, vertical plate 5, extension plate 501, cantilever plate 6, reserved groove 601, compacting rod 7, bending tube 701, bending rod 702, crankshaft 703, first compacting motor 704, center axis 705, second compacting motor 706, expansion pad 8, hinge strip 801, elastic sheet 802, expansion spring 803, hydraulic press 9, forked rod 901, guide rail 10, servo motor 1001, screw rod 1002, nut block 1003, stage 11, stepping motor 1101, positioning turntable 1102, extension arm 1103, mounting plate 1104, cutting machine 1105, welding machine 1106, shaping frame 1107, shaping rod 1108. DETAILED DESCRIPTION

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by technicians in the technical field of this application; the terms used in the specification of the application herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.

[0034] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0035] The present invention provides an intelligent welding device for a water heater inner tank, such as Figure 1-10As shown, it includes a base plate 1, a mold cylinder 3 is arranged above the base plate 1, a beam arm 2 is arranged at the rear end of the mold cylinder 3, the beam arm 2 is fixedly connected to the top surface of the base plate 1 through a grounding flange 201, a sheet metal piece 4 is arranged on the outside of the mold cylinder 3, and a docking groove 401 is cut out at the edge of the sheet metal piece 4; two compacting rods 7 are arranged on the outside of the sheet metal piece 4, and the compacting rods 7 are connected to the annular torsion mechanism, a heating component is arranged inside the mold cylinder 3, a gap docking component is arranged at the top of the mold cylinder 3, and a processing component is arranged above the sheet metal piece 4; the annular torsion mechanism includes a The vertical plate 5 has an extension plate 501 on its side wall, and the first compacting motor 704 and the second compacting motor 706 are fixedly mounted on the side wall of the extension plate 501. A bending tube 701 is rotatably arranged at the top of the vertical plate 5, and a bending rod 702 is rotatably arranged at the center of the bending tube 701. A crankshaft 703 is arranged at the rear end head of the bending tube 701, and a center shaft 705 is arranged at the rear end head of the bending rod 702. The crankshaft 703 is connected to the output shaft of the first compacting motor 704, and the center shaft 705 is connected to the output shaft of the center shaft 705. The two compacting rollers 7 are respectively mounted on the bending tube 701 and the bending rod 702.

[0036] In this embodiment, the sheet metal piece 4 to be processed is inserted between the mold cylinder 3 and the two compacting rollers 7. At this time, the second compacting motor 706 drives the central axis 705 and the bending rod 702 to start forward twisting, and the first compacting motor 704 drives the crankshaft 703 and the bending tube 701 to start reverse twisting. When the bending tube 701 and the bending rod 702 are mounted with two compacting rollers 7 and twisted to the top of the mold cylinder 3, the sheet metal piece 4 will be twisted into a cylindrical shape, thereby achieving the effect of automatic sheet metal rolling.

[0037] In a further embodiment of the present invention, Figure 1-6 As shown, the heating component includes a rectangular groove on the outer side of the side wall of the mold tube 3, a heating wire 302 is placed in the rectangular groove, and an arc cover plate 301 is installed at the opening of the rectangular groove, and the arc cover plate 301 and the outer arc surface of the mold tube 3 are kept flush.

[0038] In this embodiment, the heating wire 302 starts to energize and heat the sheet metal piece 4. After being heated, the sheet metal piece 4 will be shaped and its resilience will be reduced. Compared with the sheet metal rolling in the prior art, the sheet metal in the past has a certain resilience after being wound, and thus the sheet metal has the risk of rebounding or even breaking. The present invention heats the sheet metal to reduce the resilience of the sheet metal piece 4 and can better fit the outer wall of the mold tube 3.

[0039] In a further embodiment of the present invention, Figure 1-7As shown, the gap docking assembly includes a notch at the top of the mold tube 3, the edge of the notch at the top of the mold tube 3 is provided with a hinge line groove, two expansion tiles 8 are provided in the middle of the notch at the top of the mold tube 3, the edge of the expansion tile 8 is provided with a hinge strip 801 matching the hinge line groove, the outer arc surface of the expansion tile 8 is kept flush with the outer arc surface of the mold tube 3, and the inner side of the expansion tile 8 is provided with an indentation power mechanism.

[0040] In this embodiment, after the two expansion tiles 8 are recessed, the total circumference of the mold tube 3 and the expansion tiles 8 can be reduced, and the shaping rod 1108 is twisted downward and rolled on the docking groove 401, so that the docking grooves 401 can be staggered and docked together, achieving the effect of automatically splicing the edges of the sheet metal pieces 4.

[0041] In a further embodiment of the present invention, Figure 1-7 As shown, the indentation power mechanism includes an elastic sheet 802 on the inner wall of the expansion shoe 8, an expansion spring 803 is arranged on the opposite surface of the elastic sheet 802, a slope surface is arranged on the opposite surface of the elastic sheet 802, a hydraulic press 9 is fixedly installed on the bottom end of the mold cylinder 3, a forked rod 901 is arranged at the output end of the hydraulic press 9, and the ends of the forked rod 901 are both provided with 902, which abuts against the slope at the bottom end of the elastic sheet 802.

[0042] In this embodiment, the hydraulic press 9 drives the bifurcated rod 901 to retract downward for a certain distance, and the expansion spring 803 drives the elastic sheet 802 to expand to both sides, and then the expansion shoe 8 begins to twist downward and become concave.

[0043] In a further embodiment of the present invention, Figure 1-7 As shown, the slope of the slope surface of the elastic sheet 802 at the left end is greater than the slope of the slope surface of the elastic sheet 802 at the right end.

[0044] In this embodiment, during the downward contraction of the forked rod 901, the concave torsion angle of the left expansion tile 8 is greater than the concave torsion angle of the right expansion tile 8, and the docking grooves 401 on both sides of the sheet metal piece 4 can move up and down when close to docking.

[0045] In a further embodiment of the present invention, Figure 8-10As shown, the processing component includes a cantilever plate 6 at the top of the mold cylinder 3, a reserved groove 601 is arranged in the middle of the cantilever plate 6, two guide rails 10 are arranged on the bottom surface of the cantilever plate 6, a positioning slider is arranged on the guide rail 10, a loading platform 11 is arranged at the bottom end of the positioning slider, the loading platform 11 is divided into two left and right parts, a positioning horizontal axis is rotatably arranged in the middle of the left and right loading platforms 11, the positioning horizontal axis is installed on the output shaft of the stepping motor 1101, a positioning turntable 1102 is arranged on the outside of the positioning turntable 1102, three extension arms 1103 are arranged on the outside of the extension arms 1103, a mounting plate 1104 is arranged at the end of the extension arms 1103, a grooving assembly, a compacting assembly and a welding assembly are respectively arranged on the three mounting plates 1104, and the loading platform 11 is connected to the linear propulsion assembly.

[0046] In this embodiment, the stepper motor 1101 drives the positioning turntable 1102 to rotate so that the cutter 1105 moves vertically downward, and the saw blade at the output end of the cutter 1105 can cut the docking groove 401 when passing through the gap of the sheet metal piece 4.

[0047] In a further embodiment of the present invention, Figure 8-10 As shown, the grooving assembly includes two cutters 1105 on a mounting plate 1104, a thin rod is provided at the output end of the cutter 1105, a saw blade is provided at the end of the thin rod, the front cutter 1105 is higher than the rear cutter 1105, and the front cutter 1105 is positioned to the left of the rear cutter 1105.

[0048] In this embodiment, the front cutting machine 1105 can cut out the left docking groove 401, and the rear cutting machine 1105 can cut out the right docking groove 401.

[0049] In a further embodiment of the present invention, Figure 8-10 As shown, the compaction assembly includes a shaping frame 1107 on a mounting plate 1104, a shaping rod 1108 is rotatably arranged in the middle of the shaping frame 1107, the cross-section of the shaping rod 1108 matches the cross-section of the expansion tile 8, the diameter of the left half of the shaping rod 1108 is smaller than the diameter of the right half of the shaping rod 1108, and the welding assembly includes a welding machine 1106 on the side wall of the mounting plate 1104.

[0050] In this embodiment, the shaping rod 1108 is twisted downward and rolled on the docking groove 401, so that the docking grooves 401 can be staggered and docked together. After the docking grooves 401 are shaped and docked, the welding machine 1106 is twisted downward and slides along a straight line on the docking grooves 401 to perform welding operations.

[0051] In a further embodiment of the present invention, Figure 8-10As shown, the linear propulsion assembly includes a servo motor 1001 on the side wall of the cantilever plate 6, a screw rod 1002 is installed at the output end of the servo motor 1001, and a nut block 1003 mounted on the screw rod 1002 is provided on the side wall of the guide rail 10.

[0052] In this embodiment, the servo motor 1001 drives the stage 11 to translate via the lead screw 1002 and the nut block 1003 , and then the stage 11 moves back and forth in a straight line along the track of the guide rail 10 .

[0053] The following steps are involved:

[0054] S1. Insert the sheet metal piece 4 to be processed between the mold barrel 3 and the two compacting rollers 7. At this time, the second compacting motor 706 drives the central shaft 705 and the bending rod 702 to start forward twisting, and the first compacting motor 704 drives the crankshaft 703 and the bending tube 701 to start reverse twisting. When the bending tube 701 and the bending rod 702 are mounted with the two compacting rollers 7 and twisted to the top of the mold barrel 3, the sheet metal piece 4 will be twisted into a cylindrical shape with a gap between the two edges of the sheet metal piece 4. The electric heating wire 302 starts to energize and heat the sheet metal piece 4. After being heated, the sheet metal piece 4 will be shaped and its resilience will be reduced;

[0055] S2. The servo motor 1001 drives the stage 11 to translate through the screw rod 1002 and the nut block 1003, and then the stage 11 moves back and forth along the track of the guide rail 10. At this time, the stepper motor 1101 drives the positioning turntable 1102 to rotate so that the cutting machine 1105 moves vertically downward. When the saw blade at the output end of the cutting machine 1105 passes through the gap of the sheet metal piece 4, the docking groove 401 can be cut;

[0056] S3. The hydraulic press 9 drives the forked rod 901 to retract downward for a distance, and the expansion spring 803 drives the elastic sheet 802 to expand to both sides, and then the expansion tile 8 begins to twist downward and concave, and the concave torsion angle of the left expansion tile 8 is greater than the concave torsion angle of the right expansion tile 8. After the two expansion tiles 8 are concave, the total circumference of the mold tube 3 and the expansion tile 8 can be reduced, and the shaping rod 1108 is twisted downward and rolled on the docking groove 401, and then the docking grooves 401 can be staggered and docked together, and the welding machine 1106 is twisted downward and slides along a straight line on the docking groove 401 to perform welding operations.

[0057] Working principle: insert the sheet metal piece 4 to be processed between the mold barrel 3 and the two compacting rollers 7, at which time the second compacting motor 706 drives the central shaft 705 and the bending rod 702 to start forward twisting, and the first compacting motor 704 drives the crankshaft 703 and the bending tube 701 to start reverse twisting, and when the bending tube 701 and the bending rod 702 are mounted with the two compacting rollers 7 and twisted to the top of the mold barrel 3, the sheet metal piece 4 will be twisted into a cylindrical shape, achieving the effect of automatic sheet metal rolling, and the electric heating wire 302 starts to energize and heat the sheet metal piece 4, which will be shaped and reduce its resilience after being heated. Compared with the sheet metal rolling technology of the prior art, the sheet metal has a certain resilience after being rolled, and the sheet metal has the risk of rebounding or even breaking. The present invention heats the sheet metal to weaken the resilience of the sheet metal piece 4 and can better fit the outer wall of the mold tube 3. After the two expansion tiles 8 are recessed, the total circumference of the mold tube 3 and the expansion tiles 8 can be reduced. The shaping rod 1108 is twisted downward and rolled on the docking groove 401, so that the docking grooves 401 can be staggered and docked together, achieving the effect of automatically splicing the edges of the sheet metal piece 4, and the hydraulic press 9 drives the forked rod 901 to retract downward. After the forked rod 901 is retracted for a certain distance, the expansion spring 803 drives the elastic sheet 802 to expand to both sides, and then the expansion tile 8 begins to twist and concave downward. During the downward contraction of the forked rod 901, the concave torsion angle of the left expansion tile 8 is greater than the concave torsion angle of the right expansion tile 8. When the docking grooves 401 on both sides of the sheet metal piece 4 are close to docking, they can move up and down. The stepper motor 1101 drives the positioning turntable 1102 to twist and make the cutting machine 1105 move vertically downward. When the saw blade at the output end of the cutting machine 1105 passes through the gap of the sheet metal piece 4, the docking groove 401 can be cut. The first cutting machine 1105 can cut the docking groove 401 on the left, and the second cutting machine 1105 can cut the docking groove 401 on the right. The shaping rod 1108 is twisted downward and rolled on the docking groove 401, so that the docking grooves 401 can be staggered and docked together. After the docking grooves 401 are shaped and docked, the welding machine 1106 is twisted downward and slides along a straight line on the docking groove 401 to perform welding operations. The servo motor 1001 drives the stage 11 to translate through the screw rod 1002 and the nut block 1003, and then the stage 11 will move back and forth in a straight line along the trajectory of the guide rail 10.

[0058] It should be noted that, for the above-mentioned embodiments, for the sake of simplicity, they are all described as a series of action combinations, but those skilled in the art should know that the present invention is not limited by the described order of actions, because according to the present invention, some steps may be performed in other orders or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present invention.

[0059] In the several embodiments provided in the present application, it should be understood that the disclosed devices can be implemented in other ways. For example, the device embodiments described above are merely schematic, such as the division of the above-mentioned units. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or communication connection shown or discussed can be through some interfaces, and the indirect coupling or communication connection between devices or units can be in the form of telecommunication or other forms.

[0060] The units described above as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0061] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the scope of protection of the invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on these embodiments, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in this field can still combine, add, delete or make other adjustments to the features in the various embodiments of the present invention according to the circumstances without conflict, without making creative work, so as to obtain different other technical solutions that do not deviate from the concept of the present invention in essence, and these technical solutions also belong to the scope of protection of the present invention.

Claims

1. An intelligent welding device for a water heater tank, characterized in that: It comprises a base plate (1), a mold cylinder (3) is arranged above the base plate (1), a cantilever arm (2) is arranged at the rear end of the mold cylinder (3), the cantilever arm (2) is fixedly connected to the top surface of the base plate (1) through a grounding flange (201), a sheet metal piece (4) is arranged on the outer side of the mold cylinder (3), and a docking groove (401) is cut on the edge of the sheet metal piece (4); Two compacting rollers (7) are arranged on the outside of the sheet metal piece (4), and the compacting rollers (7) are connected to the annular torsion mechanism. A heating component is arranged inside the mold cylinder (3), a gap docking component is arranged at the top of the mold cylinder (3), and a processing component is arranged above the sheet metal piece (4); The annular torsion mechanism comprises a vertical plate (5) on the side wall of the cantilever arm (2), an extension plate (501) is arranged on the side wall of the vertical plate (5), a first compacting motor (704) and a second compacting motor (706) are fixedly mounted on the side wall of the extension plate (501), a zigzag tube (701) is rotatably arranged at the top of the vertical plate (5), a zigzag rod (702) is rotatably arranged at the center of the zigzag tube (701), a crankshaft (703) is arranged at the rear end of the zigzag tube (701), a center shaft (705) is arranged at the rear end of the zigzag rod (702), the crankshaft (703) is connected to the output shaft of the first compacting motor (704), the center shaft (705) is connected to the output shaft of the center shaft (705), and two compacting rollers (7) are respectively mounted on the zigzag tube (701) and the zigzag rod (702).

2. The intelligent welding device for the inner tank of a water heater according to claim 1, characterized in that: The heating assembly comprises a rectangular groove on the outer side of the side wall of the mold barrel (3), a heating wire (302) is placed in the rectangular groove, an arc-shaped cover plate (301) is installed at the opening of the rectangular groove, and the arc-shaped cover plate (301) and the outer arc surface of the mold barrel (3) are kept flush.

3. The intelligent welding device for the inner tank of a water heater according to claim 1, characterized in that: The gap docking assembly comprises a notch at the top end of the mold tube (3), the edge of the notch at the top end of the mold tube (3) is provided with a hinge line groove, two expansion shoes (8) are provided in the middle of the notch at the top end of the mold tube (3), the edge of the expansion shoe (8) is provided with a hinge strip (801) matching the hinge line groove, the outer arc surface of the expansion shoe (8) is kept flush with the outer arc surface of the mold tube (3), and the inner side of the expansion shoe (8) is provided with an inward power mechanism.

4. The intelligent welding device for the inner tank of a water heater according to claim 3, characterized in that: The inward-falling power mechanism comprises an elastic sheet (802) on the inner side wall of the expansion shoe (8), an expansion spring (803) is arranged on the opposite surface of the elastic sheet (802), and a slope surface is arranged on the opposite surface of the elastic sheet (802). A hydraulic press (9) is fixedly installed at the bottom end of the mold cylinder (3), and a bifurcated rod (901) is arranged at the output end of the hydraulic press (9), and the ends of the bifurcated rod (901) are both provided with (902), and (902) abuts against the slope at the bottom end of the elastic sheet (802).

5. The intelligent welding device for the inner tank of a water heater according to claim 4, characterized in that: The slope of the slope surface of the elastic sheet (802) at the left end is greater than the slope of the slope surface of the elastic sheet (802) at the right end.

6. The intelligent welding device for the inner tank of a water heater according to claim 1, characterized in that: The processing assembly comprises a cantilever plate (6) at the top end of the mold cylinder (3), a reserved groove (601) is arranged in the middle of the cantilever plate (6), two guide rails (10) are arranged on the bottom surface of the cantilever plate (6), a positioning slider is arranged on the guide rail (10), a loading platform (11) is arranged at the bottom end of the positioning slider, the loading platform (11) is divided into two left and right parts, a positioning horizontal axis is rotatably arranged in the middle of the left and right loading platforms (11), the positioning horizontal axis is installed on the output shaft of the stepping motor (1101), a positioning turntable (1102) is arranged on the outside of the positioning turntable (1102), three extension arms (1103) are arranged on the outside of the positioning turntable (1102), the end of the extension arm (1103) is arranged with a mounting plate (1104), a grooving assembly, a compacting assembly and a welding assembly are respectively arranged on the three mounting plates (1104), and the loading platform (111) is connected to the linear propulsion assembly.

7. The intelligent welding device for the inner tank of a water heater according to claim 6, characterized in that: The grooving assembly comprises two cutters (1105) on a mounting plate (1104), the output end of the cutter (1105) is provided with a thin rod, the end of the thin rod is provided with a saw blade, the height of the front cutter (1105) is greater than the height of the rear cutter (1105), and the position of the front cutter (1105) is a distance to the left relative to the rear cutter (1105).

8. The intelligent welding device for the inner tank of a water heater according to claim 6, characterized in that: The compacting assembly includes a shaping frame (1107) on a mounting plate (1104), a shaping rod (1108) is rotatably arranged in the middle of the shaping frame (1107), the cross section of the shaping rod (1108) matches the cross section of the expansion tile (8), the diameter of the left half shaping rod (1108) is smaller than the diameter of the right half shaping rod (1108), and the welding assembly includes a welding machine (1106) on the side wall of the mounting plate (1104).

9. The intelligent welding device for the inner tank of a water heater according to claim 6, characterized in that: The linear propulsion assembly comprises a servo motor (1001) on the side wall of the cantilever plate (6), a screw rod (1002) is installed at the output end of the servo motor (1001), and a nut block (1003) sleeved on the screw rod (1002) is arranged on the side wall of the guide rail (10).

10. A welding method for a water heater tank according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1. Insert the sheet metal piece (4) to be processed between the mold barrel (3) and the two compacting rollers (7). At this time, the second compacting motor (706) drives the central shaft (705) and the bending rod (702) to start forward twisting, and the first compacting motor (704) drives the crankshaft (703) and the bending tube (701) to start reverse twisting. When the bending tube (701) and the bending rod (702) are mounted with the two compacting rollers (7) and twisted to the top of the mold barrel (3), the sheet metal piece (4) will be twisted into a cylindrical shape with a gap between the two edges of the sheet metal piece (4). The electric heating wire (302) starts to energize and heat the sheet metal piece (4). After being heated, the sheet metal piece (4) will be shaped and its resilience will be reduced; S2. The servo motor (1001) drives the stage (11) to translate through the screw rod (1002) and the nut block (1003), and then the stage (11) moves back and forth in a straight line along the track of the guide rail (10). At this time, the stepper motor (1101) drives the positioning turntable (1102) to twist so that the cutting machine (1105) moves vertically downward. When the saw blade at the output end of the cutting machine (1105) passes through the gap of the sheet metal piece (4), the docking groove (401) can be cut; S3. The hydraulic press (9) drives the bifurcated rod (901) to retract downward for a certain distance, and the expansion spring (803) drives the elastic sheet (802) to expand to both sides, and then the expansion shoe (8) begins to twist downward and concave, and the concave torsion angle of the left expansion shoe (8) is greater than the concave torsion angle of the right expansion shoe (8). After the two expansion shoes (8) are concave, the total circumference of the mold cylinder (3) and the expansion shoe (8) can be reduced, and the shaping rod (1108) is twisted downward and rolled on the docking groove (401), and then the docking grooves (401) can be staggered and docked together, and the welding machine (1106) is twisted downward and slides along a straight line on the docking groove (401) to perform welding operations.

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