Ultrathin-wall high-frequency welding refrigeration steel pipe strip steel laser automatic butt welding mechanism

Abstract

The utility model discloses an ultra-thin-wall high-frequency welding refrigeration steel pipe strip steel laser automatic butt welding mechanism which comprises a laser machine and a welding table which is arranged at the near point of the laser machine and moves perpendicular to the running direction of strip steel, and is characterized in that a material shearing and opening flattening mechanism is arranged on the welding table, and an inverted laser gun is arranged below the table top of the welding table; the gun head of the laser gun is matched with a through hole formed in the table top of the welding table, and a strip steel moving and combining mechanism is matched with the material shearing and opening flattening mechanism and the laser gun. The problem that strip steel butt joint operation depends on the skill level of workers is effectively solved, and the training time of new employees is greatly shortened; the thickness of the joint is consistent with that of the master tape, polishing is not needed, the impedor in the steel pipe is prevented from being damaged, the shutdown frequency is reduced, and the use amount of the impedor is saved; the straightness of the strip steel at the joint is ensured, defects such as camber are avoided, the rejection rate is reduced, and the quality of a welded pipe is improved; and noise pollution and the like generated by the existing process are eliminated.

Description

Technical Field

[0001] The utility model relates to the manufacturing technology of refrigeration steel pipes, in particular to a laser automatic butt welding mechanism for strip steel of ultra-thin wall high-frequency welded refrigeration steel pipes. Background Art

[0002] The butt joint of strip steel is a problem that often occurs in industrial manufacturing enterprises. For example, in the patent publication number CN109604852B, a butt welding machine for strip steel includes a frame, an unwinding mechanism for unwinding strip steel, and a welding mechanism for welding strip steel. A receiving platform is arranged below the welding mechanism on the frame. A welding slag receiving box is arranged at the upper end of the receiving platform. A slide rail parallel to the feeding direction of the strip steel is arranged on the receiving platform. A slider sliding in the slide rail is arranged at the bottom of the welding slag receiving box. A strip steel butt joint device disclosed in CN214383000U includes an operating table. A box body is fixedly connected to the bottom of the operating table. Pressing plates are symmetrically arranged on both sides of the top of the operating table. Connecting columns are symmetrically and fixedly connected to the front and rear sides of the bottom of the pressing plates. This device restricts the strip steel, aligns two strip steels to be butted, removes impurities on the surface of the strip steel to be butted, and removes waste produced during the butting process.

[0003] For the strip steel, which is the raw material of ultra-thin wall refrigeration steel pipes, to ensure its continuous production without interruption, the head of one coil of strip steel needs to be connected to the tail of another coil of strip steel. Since the thickness of the strip steel is only 0.45mm, these rough, low-precision connection ends, inability to process defects in the same working step, and ordinary welding methods in the above disclosed technologies cannot solve this problem. Therefore, the traditional joint welding method is mainly "strip steel shearing + resistance butt welding + joint grinding", all of which are completed manually.

[0004] Since manual welding is generally butt welding, the thickness of the joint increases after welding, and the grinding thickness control is inaccurate. As a result, the product may stop due to the impedance device being damaged caused by the excessive thickness (note: for example, if the inner diameter of the steel pipe is φ7.2mm and the outer diameter of the impedance device is φ6.5mm); moreover, during manual welding, the two strips of steel are often not completely aligned, resulting in a sickle bend phenomenon at the joint, affecting the quality of the welded pipe; in addition, it highly depends on the skills of employees, the training time for new employees is long, and noise pollution will be generated during grinding and knocking the joint. Summary of the Invention

[0005] The purpose of the utility model is to solve the above problems, and provide a laser automatic butt welding mechanism for strip steel of ultra-thin wall high-frequency welded refrigeration steel pipes, which has the characteristics of automatic shearing, alignment and clamping, continuous butt welding operation, simple operation, no need for grinding, no damage to the internal impedance device of the steel pipe, and short training time for new employees to take up their posts.

[0006] The above technical problems of the present utility model are mainly solved by the following technical solutions: A laser automatic butt welding mechanism for strip steel of an ultra-thin wall high-frequency welded refrigeration steel pipe, which includes a laser machine and a welding table arranged near the laser machine and moving vertically in the direction perpendicular to the running direction of the strip steel. It is characterized in that a shearing and flattening mechanism is provided on the welding table, an inverted laser welding gun is provided below the tabletop of the welding table, the gun head of the laser welding gun is matched with a through hole provided on the tabletop of the welding table, and a strip steel moving and combining mechanism is provided in cooperation with the shearing and flattening mechanism and the laser welding gun.

[0007] The strip steel moving and combining mechanism includes a first butt joint cylinder die and a second butt joint cylinder die arranged on both sides of the shearing and flattening mechanism. The first butt joint cylinder die and the second butt joint cylinder die are respectively provided with a displacement cylinder group die and a pressing cylinder die that can move vertically along the running direction of the strip steel. A flattening device is provided between the displacement cylinder group dies opposite to the shearing and flattening mechanism.

[0008] In the above-mentioned laser automatic butt welding mechanism for strip steel of an ultra-thin wall high-frequency welded refrigeration steel pipe, preferably, the shearing and flattening mechanism is vertically installed on the welding table, and the shearing and flattening mechanism includes a shearing die.

[0009] In the above-mentioned laser automatic butt welding mechanism for strip steel of an ultra-thin wall high-frequency welded refrigeration steel pipe, preferably, the shearing die has two parallel cuttings, and the two parallel cuttings respectively correspond to the strip steel clamped by the pressing cylinder die and the butt joint cylinder die.

[0010] In the above-mentioned laser automatic butt welding mechanism for strip steel of an ultra-thin wall high-frequency welded refrigeration steel pipe, preferably, pressing cylinder dies are respectively configured in the first butt joint cylinder die and the second butt joint cylinder die, and the pressing cylinder dies act vertically up and down.

[0011] In the above-mentioned laser automatic butt welding mechanism for strip steel of an ultra-thin wall high-frequency welded refrigeration steel pipe, preferably, the first butt joint cylinder die and the second butt joint cylinder die are respectively provided with longitudinal and transverse movement modules along the running direction of the strip steel and in the direction perpendicular to the running direction of the strip steel.

[0012] In the above-mentioned laser automatic butt welding mechanism for strip steel of an ultra-thin wall high-frequency welded refrigeration steel pipe, preferably, a detachable strip steel positioning groove is provided above the longitudinal and transverse movement modules.

[0013] In the above-mentioned laser automatic butt welding mechanism for strip steel of an ultra-thin wall high-frequency welded refrigeration steel pipe, preferably, in the strip steel moving and combining mechanism, proximity switches are provided on the pressing cylinder die, the butt joint cylinder die, the displacement cylinder group die and the flattening device.

[0014] In the above-mentioned laser automatic butt welding mechanism for strip steel of an ultra-thin wall high-frequency welded refrigeration steel pipe, preferably, the bottom feet of the welding table are positioned on a tooling moving bracket, and the tooling moving bracket provides a guide rail for the vertical movement of the welding table along the running direction of the strip steel.

[0015] In the foregoing automatic laser butt welding mechanism for strip steel of ultra-thin-wall high-frequency welded refrigeration steel pipes, preferably, the laser welding torch is connected to a welding torch moving module arranged in the welding table; the welding torch moving module is provided with a fine-tuning mechanism for the tip of the laser welding torch.

[0016] In the foregoing automatic laser butt welding mechanism for strip steel of ultra-thin-wall high-frequency welded refrigeration steel pipes, preferably, the welding table is of a cabinet structure, the height of the welding table is adapted to the running height of the strip steel, and a start-stop button box is arranged on the tabletop of the welding table.

[0017] In this technical solution, the two strip steels to be butt-welded are clamped and positioned on the same welding table, the butt ends are synchronously butted and the edges are trimmed, ensuring that no starting arc notches or finishing arc notches are generated on both sides of the strip steel joint, eliminating defects such as sickle bends at the strip steel joints, making the joint part flat and smooth; at the same time, it is sent to the welding point, and the flattening device maintains the flatness of the joint, ensuring the consistency of the cutting and welding process and stabilizing the welding quality; it is welded once by high-frequency laser, the weld seam is complete, and the laser welding torch is inverted for welding to prevent laser damage to the eyes and ensure operation safety; this device can achieve the purpose of continuous automatic operations such as automatic clamping, automatic shearing, automatic alignment, and automatic butt welding of strip steel through the effective utilization of existing control technologies such as computer central processing units and programmable logic controllers.

[0018] Compared with the prior art, the beneficial effects of the present utility model are as follows: effectively solving the problem of dependence on the skill level of workers in strip steel butt welding operations, greatly shortening the training time for new employees; the thickness of the joint is the same as that of the mother strip, without the need for grinding, avoiding damage to the impedance device inside the steel pipe, reducing the number of shutdowns, and saving the usage amount of impedance devices; ensuring the straightness of the strip steel at the joint, eliminating the generation of defects such as sickle bends, reducing the rejection rate, and improving the quality of welded pipes; eliminating noise pollution generated by the existing process production, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic structural diagram of the present utility model.

[0020] Figure 2 is Figure 1 a schematic structural diagram of the welding table part in

[0021] Figure 3 is a schematic structural diagram of some components inside the box of the welding table part of the present utility model.

[0022] Figure 4 is a schematic top view structural diagram of the state where the strip steel is installed on the welding table part of the present utility model.

[0023] Figure 5 is a schematic structural diagram of the state of the cutting die punching notch of the present utility model.

[0024] Figure 6 This is a schematic diagram of the high-frequency welding state structure of the present utility model.

[0025] In the figure: 1 - laser machine, 101 - laser welding torch, 2 - shearing and flattening mechanism, 201 - shearing die, 3 - strip steel moving and combining mechanism, 301 - pressing cylinder die, 302 - first docking cylinder die, 303 - displacement cylinder group die, 304 - second docking cylinder die, 305 - flattening point cylinder, 306 - flattening device, 4 - welding table, 5 - strip steel, 6 - start-stop button box, 7 - tooling moving bracket, 8 - welding torch moving module. Specific implementation mode

[0026] Next, through embodiments and in combination with the attached drawings, the technical solutions of the present utility model will be further specifically described.

[0027] An automatic laser butt welding mechanism for strip steel of an ultra-thin wall high-frequency welded refrigeration steel pipe in this embodiment, as Figure 1 shown, includes an externally purchased laser machine 1. A welding table 4 is arranged within the installation range of the laser welding torch 101 near the laser machine 1. The welding table 4 is arranged on the tooling moving bracket 7. The tooling moving bracket 7 provides a guide rail for the vertical movement of the welding table 4 along the running direction of the strip steel 5, so as to realize the vertical movement of the welding table 4 along the running direction of the strip steel 5. When the strip steel 5 runs normally, the welding table 4 can avoid the strip steel 5, and when the strip steel 5 needs to be butt-jointed, it moves to the working position. Generally speaking, the running position of the strip steel 5 is unchanged, so the working position of the welding table 4 can also be set as a fixed point position to reduce the position adjustment time and improve the positioning speed.

[0028] The welding table 4 is of a cabinet structure. The height of the welding table 4 is adapted to the running height of the strip steel 5. A start-stop button box 6 is arranged on the tabletop of the welding table 4. In the strip steel moving and combining mechanism 3, proximity switches are provided for the pressing cylinder die 301, the docking cylinder die 302, the displacement cylinder group die 303, and the flattening device 306, etc. This device is equipped with a computer central processing unit CPU and a programmable logic controller PLC in the prior art, and simple programming is done, which will not be elaborated here.

[0029] See Figure 2 、 Figure 3 , a shearing and flattening mechanism 2 is arranged on the welding table 4, and an inverted laser welding torch 101 is arranged below the tabletop of the welding table 4. The gun head of the laser welding torch 101 is matched with a through hole arranged on the tabletop of the welding table, and a strip steel moving and combining mechanism 3 is provided in cooperation with the shearing and flattening mechanism 2 and the laser welding torch 101.

[0030] Specifically, the strip steel moving and combining mechanism 3 includes a first docking cylinder die 302 and a second docking cylinder die 304 arranged on both sides of the shearing and flattening mechanism 2. See Figures 4 to 6, the first docking cylinder die 302 and the second docking cylinder die 304 are respectively provided with a displacement cylinder group die 303 that can move vertically along the running direction of the strip 5. A flattening device 306 is provided opposite to the shearing and flattening mechanism 2 and between the displacement cylinder group dies 303. A flattening point cylinder 305 is provided at the position of the flattening device 306.

[0031] The shearing and flattening mechanism 2 is vertically installed on the welding table 4. The shearing and flattening mechanism 2 includes a shearing die 201. The shearing die 201 has two parallel cuttings. The two parallel cuttings respectively correspond to the strip 5 clamped by the pressing cylinder die 301 and the docking cylinder die 302. When the shearing and flattening mechanism 2 works, the head and tail of the strip 5 to be docked are cut at the same time to ensure that the sizes and line structures of the mating edges of the docked strip 5 are consistent.

[0032] In this embodiment, components such as the first docking cylinder die 302 and the second docking cylinder die 304 are all composed of a cylinder, modules with functions such as clamping, pressing, and positioning connected to the cylinder piston rod, and bases, brackets, etc. fixed on the welding table 4, including, for example, the first docking cylinder die 302 and the second docking cylinder die 304 are respectively provided with vertical and horizontal movement modules along the running direction of the strip 5 and perpendicular to the running direction of the strip 5.

[0033] The above-mentioned first docking cylinder die 302 and the second docking cylinder die 304 are respectively provided with a pressing cylinder die 301 acting vertically. A detachable strip positioning groove is also provided above the vertical and horizontal movement module to meet the docking and positioning needs of strips 5 of different specifications. After the strip 5 to be docked is positioned in the strip positioning groove, the strip 5 is firmly pressed and fixed by the pressing cylinder die 301.

[0034] The laser welding torch 101 is connected to the welding torch movement module 8 arranged in the welding table 4. The welding torch movement module 8 has a fine-tuning mechanism for the tip of the laser welding torch 101 to meet the position accuracy selection during installation and debugging.

[0035] The working principle and operation steps are as follows: Refer again to Figures 4 to 6, First, move the welding platform 4 to the center line position of the strip 5 running. Then, place the tail end of the strip 5 to be joined into the strip positioning groove of the first docking cylinder die 302, and activate the corresponding pressing cylinder die 301. Here, the strip 5 is pressed. Third, place the head end of another strip 5 to be joined into the strip positioning groove of the second docking cylinder die 304, and activate the corresponding pressing cylinder die 301. Here, the strip 5 is also pressed. Fourth, start the displacement cylinder group die 303. The controller PLC and CPU receive the start signal, and the strip moving and combining mechanism 3 simultaneously sends the strips 5 clamped by the first docking cylinder die 302 and the second docking cylinder die 304 into the shearing and flattening mechanism 2; the CPU receives the signal from the proximity switch on the cylinder of the strip moving and combining mechanism 3, and the shearing and flattening mechanism 2 completes the simultaneous shearing of the head and tail joined strips 5. Fifth, the signal received through the proximity switch on the cylinder in the shearing and flattening mechanism 2 is transmitted to the CPU, which commands the strip moving and combining mechanism 3 to simultaneously displace the strip 5 with trimmed edges to the welding position. Sixth, the proximity switch on the corresponding cylinder of the strip moving and combining mechanism 3 emits a signal, commanding the flattening device 306 to flatten the strip; the proximity switch on the cylinder of the flattening device 306 emits a signal, commanding the laser welding gun 101 to start welding.

[0036] After welding is completed, the proximity switch on the laser welding gun 101 emits a signal, and the flattening device 306 opens; take out the welded strip 5. Finally, the welding platform 4 moves back to its original position and exits the center line of the strip 5 running.

[0037] Through this device, continuous automatic operations of automatic shearing, automatic alignment and clamping, and automatic butt welding of the strip 5 are realized, reducing the dependence on employees' skills. For example, the training time for new employees is shortened from the original 25 days to 5 days; the generation of strip sickle bend is eliminated, improving product quality; the original average number of impedance changer replacements per shift was 1.5 times, and now the impedance changer is replaced once every 3 shifts on average, saving 432 impedance changers per year; at the same time, more than 34 tons of waste products are reduced annually, and the noise pollution generated by knocking on the joints is eliminated, etc.

[0038] The above embodiments are illustrative of the present invention, not limiting of the present invention. Without departing from the principle of the technical solution of the present invention, any equivalent changes or equivalent modifications made according to the technical idea proposed by the present invention still fall within the scope of protection of the technical solution of the present invention.

Claims

1. An ultra-thin-wall high-frequency welded refrigeration steel pipe strip laser automatic butt welding mechanism, comprising a laser machine (1), a welding table (4) arranged at the near point of the laser machine and moving perpendicularly to the running direction of the strip (5), characterized in that A material trimming and flattening mechanism (2) is provided on the welding table, an inverted laser welding gun (101) is provided below the table top of the welding table, the laser welding gun head cooperates with a through hole provided on the table top of the welding table, and a strip steel shifting mechanism (3) is provided in cooperation with the material trimming and flattening mechanism and the laser welding gun; The strip steel shifting and joining mechanism comprises a first butt-jointing cylinder die (302) and a second butt-jointing cylinder die (304) arranged on both sides of the shearing and flattening mechanism; the first butt-jointing cylinder die and the second butt-jointing cylinder die are respectively provided with a displacement cylinder die group (303) and a pressing cylinder die (301) which can be vertically moved along the running direction of the strip steel; and a flattening device (306) is provided between the displacement cylinder die group (303) and the shearing and flattening mechanism.

2. According to claim 1, the ultra-thin wall high frequency welding refrigeration steel pipe strip laser automatic butt welding mechanism is characterized by: The material trimming and flattening mechanism (2) is vertically mounted on a welding table (4), and comprises a shearing die (201).

3. The ultra-thin-wall high-frequency welding refrigeration steel pipe strip laser automatic butt welding mechanism according to claim 2 is characterized in that: The shearing die (201) has two parallel cutouts, and the two parallel cutouts correspond to the steel strips (5) clamped by the pressing cylinder die (301) and the docking cylinder die (302) respectively.

4. The ultra-thin-wall high-frequency welding refrigeration steel pipe strip laser automatic butt welding mechanism according to claim 1 or 3, characterized in that: The first butt joint cylinder mold (302) and the second butt joint cylinder mold (304) are respectively provided with a clamping cylinder mold (301), and the clamping cylinder mold moves vertically up and down.

5. The ultra-thin-wall high-frequency welding refrigeration steel pipe strip laser automatic butt welding mechanism according to claim 1 is characterized in that: The first butt joint cylinder die (302) and the second butt joint cylinder die (304) are respectively provided with longitudinal and transverse moving modules along the running direction of the steel strip (5) and in a direction perpendicular to the running direction of the steel strip.

6. The ultra-thin-wall high-frequency welding refrigeration steel pipe strip laser automatic butt welding mechanism according to claim 5 is characterized in that: A detachable steel strip positioning groove is provided above the longitudinal and transverse moving module.

7. The ultra-thin-wall high-frequency welding refrigeration steel pipe strip laser automatic butt welding mechanism according to claim 4 is characterized in that: In the strip steel shifting mechanism (3), the pressing cylinder die (301), the docking cylinder die (302), the displacement cylinder group die (303) and the flattening device (306) are all provided with proximity switches.

8. The ultra-thin-wall high-frequency welding refrigeration steel pipe strip laser automatic butt welding mechanism according to claim 1 is characterized in that: The bottom foot of the welding platform (4) is positioned on a tooling movable bracket (7), and the tooling movable bracket provides a guide rail for the welding platform to move vertically along the running direction of the strip steel (5).

9. The ultra-thin-wall high-frequency welding refrigeration steel pipe strip laser automatic butt welding mechanism according to claim 1 is characterized in that: The laser welding gun (101) is connected to a welding gun moving module (8) arranged in a welding table (4); the welding gun moving module has a laser welding gun head fine-tuning mechanism.

10. The ultra-thin-wall high-frequency welded refrigeration steel pipe strip laser automatic butt welding mechanism according to claim 1 or 4, characterized in that: The welding table (4) is a cabinet structure, the height of the welding table is adapted to the running height of the steel strip (5), and a start / stop button box (6) is provided on the table top of the welding table.

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