A can body ring seam laser welding device for beer storage tank production

Abstract

The present application relates to metal welding equipment technical field, disclose a kind of for beer storage tank production tank body ring seam laser welding equipment, including welding machine main body, setting in the lifting arm of welding machine main body top, workpiece is placed in the lifting arm top, still include the welding mechanism of setting in the welding machine main body far from workpiece side;Welding mechanism includes setting in the support of welding machine main body far from workpiece side, the chute being opened in the upper portion of support middle portion, two settings in the inner wall of support cross bar, setting in the middle portion of cross bar limit block, limit block side close to cross bar and chute sliding connection, eccentric wheel is symmetrically set in the inner wall of limit block two sides, handle is commonly set between two eccentric wheels, slider is set in the cross bar side close to workpiece, laser head is set in the slider side close to workpiece, and wire feeding unit is set in the support side far from workpiece. By setting welding mechanism, it can be simultaneously to multiple weld simultaneously welding, improve processing efficiency.

Description

Technical Field

[0001] This invention relates to the field of metal welding equipment technology, and in particular to a laser welding equipment for circumferential seams of beer storage tanks. Background Technology

[0002] This laser welding equipment for circumferential seams of tanks is specifically designed for circumferential welds on round containers such as beer storage tanks. It uses a high-energy-density laser beam as the heat source, instantly melting the stainless steel plate joint to form a continuous and uniform weld. The equipment integrates a visual positioning and automatic weld tracking system, which can correct the welding torch position in real time. Combined with inert gas protection, it effectively prevents weld oxidation. Compared to traditional welding methods, laser welding features a smaller heat-affected zone and lower deformation, maintaining good dimensional accuracy and surface quality of the tank. The weld has excellent sealing performance, a smooth inner wall that is easy to clean, and meets the stringent hygiene and structural strength requirements of beer storage. The equipment has a compact structure and can be flexibly adjusted to accommodate different tank diameters, making it widely applicable for the efficient and automated production of circumferential seams on various stainless steel containers.

[0003] Traditional laser welding equipment is widely used in metal processing, but due to limitations in its structure and working principle, it often suffers from several unavoidable problems. Some existing tank circumferential weld equipment uses a single laser head structure, requiring multiple clamping or repositioning during multi-pass welding or switching between different weld seams, resulting in long process transition times. When welding deep weld seams multiple times, the distance between the laser head and the weld head is often adjusted manually by visual inspection, and positional consistency depends on operator experience. Locking mechanisms are often simple pressure plates, which may experience slight displacement under high-frequency vibration. The wire feeding unit typically has a single-channel fixed speed output, making independent adjustment difficult when the required filler volume for two weld seams differs. Furthermore, the crossbar movement trajectory is often linear, deviating from the ideal arc path of the circumferential weld, affecting arc alignment efficiency. Summary of the Invention

[0004] Given the problems of existing technology, such as the low efficiency of multi-pass welding and multi-seam processing due to the single laser head structure of welding equipment, and the problem of the single wire feeding speed, a laser welding equipment for circumferential seams of beer storage tanks is proposed.

[0005] Its purpose is to enable welding equipment to achieve flexible adjustment and locking of the distance between the two laser heads, independent differential wire feeding in two paths, and adapt to the arc trajectory of the circumferential seam.

[0006] The technical solution of the present invention is a laser welding equipment for the circumferential seam of a beer storage tank, comprising a welding machine body, a lifting arm disposed on the top of the welding machine body, a workpiece placed on the top of the lifting arm, and a welding mechanism disposed on the side of the welding machine body away from the workpiece. The welding mechanism includes a bracket disposed on the side of the welding machine body away from the workpiece, a slide groove opened in the upper middle part of the bracket, two crossbars disposed on the inner wall of the bracket, a limiting block disposed in the middle of the crossbars, the side of the limiting block near the crossbars being slidably connected to the slide groove, eccentric wheels symmetrically disposed on the inner walls of the two sides of the limiting blocks, a handle disposed between the two eccentric wheels, a slider disposed on the side of the crossbars near the workpiece, a laser head disposed on the side of the slider near the workpiece, and a wire feeding unit disposed on the side of the bracket away from the workpiece.

[0007] Furthermore, the limiting block has an internal movable cavity, the middle part of the handle is slidably connected to the movable cavity, and the outer wall of the eccentric wheel is rotatably connected to the inner wall of the movable cavity.

[0008] Furthermore, the bracket has symmetrical arc-shaped grooves on both sides, and the two ends of the crossbar are slidably connected to the inner walls of the two arc-shaped grooves respectively.

[0009] Furthermore, the top and bottom of the crossbar are provided with grooves, and the inner wall of the slider is adapted to slide in the grooves.

[0010] Furthermore, the wire feeding unit includes a stand on the side of the support away from the workpiece, a material roll on the top of the stand, a housing on the side of the stand away from the workpiece, a motor on the side of the housing close to the workpiece, wire guide tubes obliquely and symmetrically arranged on the outer walls of both sides of the housing, with one end of the wire guide tube away from the housing fixedly connected to the corresponding laser head, a gear pair located inside the housing where the motor output shaft is located, telescopic shafts symmetrically arranged on both sides of the gear pair, a conical wheel located on the end of the telescopic shaft away from the gear pair, a moving block located at the bottom of the telescopic shaft, a knob located on the inner wall of the moving block, a moving groove opened on the inner wall of the housing near the moving block, a screw symmetrically arranged at the bottom of the housing, a short arm located at the top of the screw, a roller located at the top of the short arm, and wire holes symmetrically opened at the connection between the housing and the wire guide tube.

[0011] Furthermore, welding wire is wound around the material coil, and the bottom end of the welding wire passes through the corresponding wire hole and the threading tube in sequence, and finally extends out from the laser head. The wire threading directions of the two wire holes are opposite.

[0012] Furthermore, the gear pair consists of a driving gear and two driven gears, and the telescopic shaft consists of a bushing and a splined shaft, with the end of the bushing near the gear pair fixedly connected to the corresponding driven gear.

[0013] Furthermore, an elongated hole is provided in the middle of the short arm, and a fixed shaft is provided on the inner wall of the outer shell near the elongated hole. The outer wall of the fixed shaft is slidably connected to the inner wall of the elongated hole, and the outer walls of the roller and the conical wheel are tumblingly connected to the welding wire passing through the corresponding wire hole.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. By setting up a welding mechanism, multiple welds can be welded simultaneously, improving processing efficiency. The equipment can flexibly adjust the distance between the two laser heads, allowing the same weld to be welded twice in sequence, meeting the multi-pass filling process requirements of deep welds. After the distance is adjusted, it remains stable and locked to ensure consistent welding paths. The equipment supports independent movement of the laser head along the weld direction, adapting to different tank sizes and circumferential weld layouts, resulting in uniform welding quality. The equipment reduces the number of times workpieces are repeatedly clamped and positioned, reducing operational difficulty and shortening production cycle time. The welding mechanism has a compact structure, direct adjustment actions, and improved processing adaptability.

[0015] 2. By setting up a wire feeding unit, welding wire can be fed to two laser heads simultaneously, realizing dual-path independent wire feeding. The unit can clamp welding wires of different diameters, and switching can be completed without changing parts. The unit changes the wire feeding speed by adjusting the contact position between the welding wire and the conical wheel, so that the two laser heads obtain different wire feeding amounts, meeting the differentiated requirements of the filling speed of the preceding and following welds. The wire feeding action of the unit is continuous and stable, and the welding wire path is guided and constrained to avoid entanglement or jamming. Therefore, the equipment can adapt to a variety of welding process combinations, improve the weld formation quality, and reduce welding defects caused by uneven wire feeding.

[0016] 3. By setting an eccentric wheel, the equipment can lock and unlock the limit block and crossbar. In the locked state, the laser head position is fixed to avoid displacement during welding. In the unlocked state, the adjustment is smooth and the operation is labor-saving. The equipment maintains the consistency of the welding path, the weld joint is accurate, and the locking is reliable after adjustment, reducing the impact of vibration on the laser head position, the welding quality is stable, the equipment adapts to the adjustment needs of different workstations, the structure is simple and the operation is direct. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the entire invention; Figure 2 This is a schematic diagram of the support structure of the present invention; Figure 3 This is a schematic diagram of the connection between the crossbar and the bracket of the present invention; Figure 4 This is a schematic diagram of the connection between the slider and the crossbar of the present invention; Figure 5 This is a schematic diagram of the internal structure of the limiting block of the present invention; Figure 6 This is a schematic diagram of the overall structure of the welding mechanism of the present invention; Figure 7 This is a schematic diagram showing the connection between the outer casing and the conduit of the present invention; Figure 8 This is a schematic diagram of the internal structure of the outer shell of the present invention; Figure 9 This is a schematic diagram of the connection between the telescopic shaft and the conical wheel of the present invention; Figure 10 This is a schematic diagram of the connection between the roller and the short arm of the present invention; Figure 11 This is a schematic diagram of the connection between the screw and the short arm of the present invention; Figure 12 This is a schematic diagram showing the connection between the laser head and the slider of the present invention.

[0018] In the picture: 1. Welding machine body; 2. Lifting arm; 3. Workpiece; 4. Welding mechanism; 41. Support; 42. Slide rail; 43. Crossbar; 44. Limiting block; 45. Eccentric wheel; 46. Handle; 47. Slider; 48. Laser head; 49. Stand; 410. Material roll; 411. Outer shell; 412. Motor; 413. Conduit; 414. Gear pair; 415. Telescopic shaft; 416. Conical wheel; 417. Moving block; 418. Knob; 419. Moving groove; 420. Screw; 421. Short arm; 422. Roller; 423. Wire hole. Detailed Implementation

[0019] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0020] Example 1, referring to Figures 1-2 This invention provides a laser welding device for the circumferential seam of beer storage tanks, comprising a welding machine body 1, a lifting arm 2 slidably connected to the top of the welding machine body 1, a workpiece 3 placed on the top of the lifting arm 2, and a welding mechanism 4 installed on the side of the welding machine body 1 away from the workpiece 3. The welding mechanism 4 includes a bracket 41 fixedly connected to the side of the welding machine body 1 away from the workpiece 3, a groove 42 opened in the upper middle part of the bracket 41, two crossbars 43 slidably connected to the inner wall of the bracket 41, a limiting block 44 fixedly connected to the middle part of the crossbars 43, the side of the limiting block 44 near the crossbars 43 being slidably connected to the groove 42, eccentric wheels 45 symmetrically rotatably connected to the inner walls on both sides of the limiting block 44, a handle 46 fixedly connected between the two eccentric wheels 45, a slider 47 slidably connected to the side of the crossbars 43 near the workpiece 3, a laser head 48 fixedly connected to the side of the slider 47 near the workpiece 3, and a wire feeding unit assembled on the side of the bracket 41 away from the workpiece 3.

[0021] Specifically, when processing workpiece 3 with multiple weld seams, the slider 47 is pushed to move along the corresponding crossbar 43. Simultaneously, the slider 47 moves the corresponding laser head 48, aligning the two laser heads 48 with different weld seams for synchronous welding. When the weld seam is deep and requires multiple welding operations, the slider 47 is moved to align the two laser heads 48 with the same weld seam. Then, the handle 46 is turned, causing the eccentric wheel 45 to rotate so that its proximal end faces the bracket 41. At this point, the eccentric wheel 45 is not in contact with the bracket 41, thus locking the limit block 44. Then, push the limiting block 44 to make it move the crossbar 43 along the slide groove 42. The crossbar 43 drives the corresponding laser head 48 to move through the slider 47. After the laser head 48 is moved to the appropriate position, rotate the eccentric wheel 45 in the opposite direction so that the distal end of the eccentric wheel 45 contacts the bracket 41, thereby locking the limiting block 44 and the crossbar 43 so that they cannot move. By adjusting the position of the two crossbars 43, the distance between the two laser heads 48 is set, and then welding begins, so that the two laser heads 48 weld the same weld seam one after the other. By adjusting the distance between the laser heads 48, the multi-pass welding interval requirements of different workpieces 3 can be adapted.

[0022] Reference Figure 5 The limiting block 44 has an internal movable cavity, the middle part of the handle 46 is slidably connected to the movable cavity, and the outer wall of the eccentric wheel 45 is rotatably connected to the inner wall of the movable cavity.

[0023] Specifically, by turning the handle 46, the eccentric wheel 45 is driven to rotate inside the movable cavity, so that the eccentric wheel 45 switches to different bias positions, thereby locking or unlocking the limit block 44.

[0024] Reference Figure 2 and Figure 3 The bracket 41 has symmetrical arc-shaped grooves on both sides, and the two ends of the crossbar 43 are slidably connected to the inner walls of the two arc-shaped grooves respectively.

[0025] Specifically, the bracket 41 is connected to the crossbar 43 through an arc groove and constrains the movement trajectory of the crossbar 43, so that the crossbar 43 keeps moving around the axis of the workpiece 3.

[0026] Reference Figure 3 and Figure 4 The top and bottom of the crossbar 43 are provided with grooves, and the inner wall of the slider 47 is adapted to slide in the grooves.

[0027] Specifically, the crossbar 43 is connected to the slider 47 through a groove, which constrains the movement trajectory of the slider 47, so that the slider 47 can only move along a straight line.

[0028] Example 2, refer to Figures 1-12This is the second embodiment of the present invention, which differs from the first embodiment in that: the wire feeding unit includes a stand 49 fixedly connected to the side of the bracket 41 away from the workpiece 3, a wire roll 410 rotatably connected to the top of the stand 49, a housing 411 fixedly connected to the side of the stand 49 away from the workpiece 3, a motor 412 fixedly connected to the side of the housing 411 near the workpiece 3, wire guide tubes 413 obliquely and symmetrically fixedly connected to the outer walls of both sides of the housing 411, one end of the wire guide tube 413 away from the housing 411 being fixedly connected to the corresponding laser head 48, and a gear pair 414 fixedly connected to the output shaft of the motor 412 inside the housing 411. The telescopic shafts 415 are symmetrically fixedly connected to both sides of the gear pair 414, the conical wheel 416 is fixedly connected to the end of the telescopic shaft 415 away from the gear pair 414, the moving block 417 is fixedly connected to the bottom of the telescopic shaft 415, the knob 418 is threadedly connected to the inner wall of the moving block 417, the moving groove 419 is opened on the inner wall of the housing 411 near the moving block 417, the screw 420 is symmetrically threadedly connected to the bottom of the housing 411, the short arm 421 is rotatably connected to the top of the screw 420, the roller 422 is rotatably connected to the top of the short arm 421, and the threaded hole 423 is symmetrically opened at the connection between the housing 411 and the conduit 413.

[0029] Specifically, the wire feeding unit can simultaneously feed different welding wires to two laser heads 48 at different speeds. When using welding wires of different diameters, the welding wires are sequentially passed through the wire hole 423 and the corresponding threading tube 413, so that the welding wires extend from the corresponding laser head 48 under the guidance of the threading tube 413. Then, the corresponding screw 420 is rotated. As the screw 420 rotates, it drives the short arm 421 and the roller 422 to move in a straight line perpendicular to the welding wire. By bringing the roller 422 into contact with the welding wire, the welding wire is pushed to contact the conical wheel 416 at a slight bending angle. The conical wheel 416 and the roller 422 clamp the welding wire. Then, the motor 412 is started to drive the gear pair 414 to rotate. The gear pair 414 drives the conical wheel 416 to rotate through the telescopic shaft 415. After the conical wheel 416 rotates, it drives the welding wire to move through friction, thus realizing the wire feeding operation. By controlling the roller 422... The distance between the conical wheel 416 and the wire feed speed can accommodate welding wires of different diameters. When the wire feed speed needs to be adjusted, the knob 418 is turned to move the conical wheel 417 away from contacting the inner wall of the moving groove 419, thereby releasing the fixation of the moving block 417. Then, the knob 418 is turned to make the moving block 417 slide along the moving groove 419. The moving block 417 drives the spline shaft of the telescopic shaft 415 to move synchronously. The spline shaft drives the conical wheel 416 to move. By moving the conical wheel 416, the welding wire contacts the conical wheel 416 at different positions. When the welding wire contacts the conical wheel 416 near the tip, the contact point of the conical wheel 416 and the welding wire has a small rotational linear velocity, so the wire feed speed is slow. When the welding wire contacts the thicker end of the conical wheel 416, the contact point has a large linear velocity, so the wire feed speed is fast. By controlling the position of the two conical wheels 416, wire feeding operations at different speeds can be performed simultaneously.

[0030] Reference Figures 6-8 Welding wire is wound on the material coil 410. The bottom end of the welding wire passes through the corresponding wire hole 423 and the wire tube 413 in sequence, and finally extends out from the laser head 48. The wire threading directions of the two wire holes 423 are opposite.

[0031] Specifically, since the wire threading tubes 413 are arranged obliquely and symmetrically on both sides of the housing 411, and the wire threading directions of the two welding wires are opposite, when the motor 412 starts, the welding wires corresponding to the two coils 410 will be fed at the same time.

[0032] Reference Figure 8 and Figure 9 The gear pair 414 consists of a driving gear and two driven gears, and the telescopic shaft 415 consists of a bushing and a spline shaft. The end of the bushing near the gear pair 414 is fixedly connected to the corresponding driven gear.

[0033] Specifically, the gear pair 414 is connected to different telescopic shafts 415 through two driven wheels. The spline shaft can extend and retract within the bushing to change the length of the telescopic shaft 415, adapting to the transmission requirements after the displacement of the conical wheel 416.

[0034] Reference Figures 8-11 The short arm 421 has an elongated hole in the middle. A fixed shaft is provided on the inner wall of the outer shell 411 near the elongated hole. The outer wall of the fixed shaft is slidably connected to the inner wall of the elongated hole. The outer walls of the roller 422 and the cone wheel 416 are tumblingly connected to the welding wire passing through the corresponding wire hole 423.

[0035] Specifically, the short arm 421 is connected to the fixed shaft through a long hole, so that the short arm 421 can only move along the direction of the conical surface profile line perpendicular to the conical wheel 416. The rest of the structure is the same as that of Embodiment 1.

[0036] Based on embodiments 1-2, the working principle of this invention is as follows: The workpiece 3 is placed on top of the lifting arm 2 and adjusted to a suitable height. The welding mechanism 4 is equipped with two independent laser heads 48, which are connected to the crossbar 43 via corresponding sliders 47. When the workpiece 3 has multiple circumferential seams, the sliders 47 are pushed to align the two laser heads 48 with different weld seams, thereby achieving synchronous welding and improving efficiency. When the weld seam is deep and requires multiple welding passes, the two laser heads 48 are first arranged back and forth along the same weld seam. Then, the handle 46 is turned to release the eccentric wheel 45 from locking the limit block 44, pushing the limit block 44 to drive the crossbar 43 to slide along the arc groove of the bracket 41, thereby adjusting the arc distance between the two crossbars 43. After adjustment, the handle 46 is turned in the opposite direction, and the distal end of the eccentric wheel 45 presses against the bracket 41, locking the position of the crossbar 43. At this time, the two laser heads 48 weld the same weld seam sequentially at a fixed interval, with the former performing the base weld and the latter performing the top weld or multiple filler welds. The interval can be flexibly adjusted according to the process.

[0037] The wire feeding unit simultaneously feeds wire to two laser heads 48. Motor 412 drives two telescopic shafts 415 and a conical wheel 416 to rotate via gear pair 414. Symmetrically arranged wire guide tubes 413 guide the welding wire from the coil 410 to the laser head 48. When different diameter welding wires are required, rotating screw 420 moves short arm 421 and roller 422, causing roller 422 to clamp the welding wire with conical wheel 416, thus stabilizing wire feeding. To achieve differential wire feeding, rotating knob 418 releases the movement. Locking the moving block 417 pushes the moving block 417 to slide along the moving groove 419. The moving block 417 drives the telescopic shaft 415 to move the conical wheel 416 axially. The conical wheel 416 has a conical structure. Different linear speeds can be obtained when the welding wire contacts the conical wheel 416 at different diameters. The wire feed is slower near the tip and faster near the coarse end. By independently adjusting the axial position of the two conical wheels 416, the two laser heads 48 can obtain different wire feed speeds to meet the requirements of complex welding processes.

[0038] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A laser welding device for the circumferential seam of beer storage tanks, comprising a welding machine body (1), a lifting arm (2) disposed on the top of the welding machine body (1), and a workpiece (3) placed on the top of the lifting arm (2), characterized in that: It also includes a welding mechanism (4) located on the side of the welding machine body (1) away from the workpiece (3); The welding mechanism (4) includes a bracket (41) disposed on the side of the welding machine body (1) away from the workpiece (3), a slide groove (42) opened at the upper middle part of the bracket (41), two crossbars (43) disposed on the inner wall of the bracket (41), a limiting block (44) disposed in the middle of the crossbar (43), the side of the limiting block (44) close to the crossbar (43) being slidably connected to the slide groove (42), eccentric wheels (45) symmetrically disposed on the inner walls of both sides of the limiting block (44), a handle (46) disposed between the two eccentric wheels (45), a slider (47) disposed on the side of the crossbar (43) close to the workpiece (3), a laser head (48) disposed on the side of the slider (47) close to the workpiece (3), and a wire feeding unit disposed on the side of the bracket (41) away from the workpiece (3). The limiting block (44) has an internal movable cavity, the middle part of the handle (46) is slidably connected to the movable cavity, and the outer wall of the eccentric wheel (45) is rotatably connected to the inner wall of the movable cavity. The wire feeding unit includes a stand (49) disposed on the side of the support (41) away from the workpiece (3), a wire roll (410) disposed on the top of the stand (49), a housing (411) disposed on the side of the stand (49) away from the workpiece (3), a motor (412) disposed on the side of the housing (411) close to the workpiece (3), wire guide tubes (413) obliquely and symmetrically disposed on the outer walls of both sides of the housing (411), one end of the wire guide tube (413) away from the housing (411) being fixedly connected to the corresponding laser head (48), a gear pair (414) disposed on the output shaft of the motor (412) inside the housing (411), and symmetrically disposed on both sides of the gear pair (414). The telescopic shaft (415) on the side, the conical wheel (416) at the end of the telescopic shaft (415) away from the gear pair (414), the moving block (417) at the bottom of the telescopic shaft (415), the knob (418) on the inner wall of the moving block (417), the moving groove (419) on the inner wall of the outer casing (411) near the moving block (417), the screw (420) symmetrically arranged at the bottom of the outer casing (411), the short arm (421) at the top of the screw (420), the roller (422) at the top of the short arm (421), and the thread hole (423) symmetrically opened at the connection between the outer casing (411) and the conduit (413). Welding wire is wound on the material roll (410). The bottom end of the welding wire passes through the corresponding wire hole (423) and the wire tube (413) in sequence, and finally extends out from the laser head (48). The wire threading directions of the two wire holes (423) are opposite. The short arm (421) has an elongated hole in the middle. A fixed shaft is provided on the inner wall of the outer shell (411) near the elongated hole. The outer wall of the fixed shaft is slidably connected to the inner wall of the elongated hole. The outer walls of the roller (422) and the cone wheel (416) are slidably connected to the welding wire passing through the corresponding wire hole (423).

2. The laser welding equipment for circumferential seams of beer storage tanks according to claim 1, characterized in that: The bracket (41) has symmetrical arc-shaped grooves on both sides, and the two ends of the crossbar (43) are slidably connected to the inner walls of the two arc-shaped grooves respectively.

3. The laser welding equipment for circumferential seams of beer storage tanks according to claim 1, characterized in that: The top and bottom of the crossbar (43) are symmetrically provided with grooves, and the inner wall of the slider (47) is adapted to slide in the grooves.

4. The laser welding equipment for circumferential seams of beer storage tanks according to claim 1, characterized in that: The gear pair (414) consists of a driving gear and two driven gears, and the telescopic shaft (415) consists of a bushing and a spline shaft. The end of the bushing near the gear pair (414) is fixedly connected to the corresponding driven gear.

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