Stainless steel kitchen ware welding device

Abstract

The invention discloses a stainless steel kitchen ware welding device, and relates to the technical field of laser welding. The device specifically comprises a base, a supporting driving assembly used for supporting a stainless steel cylinder is arranged at the top of the base, a portal frame is fixed to the outer wall of the top of the base through bolts, and the lower portion of the top of the portal frame is in transmission connection with a welding mechanism through a lifting assembly; the welding mechanism comprises a U-shaped frame and side frames fixed to the two sides of the U-shaped frame through bolts, and an air blowing nozzle is fixed to the inner side wall of the side frame on one side. By arranging the smoke suction nozzle, the air blowing nozzle and the gas driving mechanism, on one hand, the air blowing nozzle located at the welding upstream position of the welding head can remove impurities from a welding seam in an air blowing mode, so that the welding quality is guaranteed, and on the other hand, the smoke suction nozzle located at the welding downstream position of the welding head can suck and filter smoke dust generated by welding, so that the welding quality is improved. Therefore, the working environment is prevented from being polluted.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of laser welding, in particular to a stainless steel kitchen utensil welding device. BACKGROUND

[0002] The kitchen utensil can be broadly referred to as kitchen equipment, which includes cooking appliances (woks, soup pots, rice cookers, ovens, etc.), processing appliances (knives, cutting boards, food processors, etc.), storage appliances (refrigerators, cabinets, fresh-keeping boxes, etc.), and cleaning appliances (sinks, dishwashers, etc.). For example, a rice cooker, an oven, a food processor, a refrigerator, or a dishwasher has a cylindrical inner cavity. Due to the non-uniformity of the size, the cylindrical blank needs to be cut and spliced during processing. Since these appliances require a certain degree of sealing, laser welding is often used for splicing.

[0003] According to the search, the patent with the patent number CN119140996A discloses a laser straight seam welding equipment and method for a stainless steel cylinder. The equipment includes a manipulator with seven degrees of freedom for laser straight seam welding of the stainless steel cylinder. A clamping seat is detachably arranged and has a clamping hole matching the outer diameter of the stainless steel cylinder. A round locking mechanism is arranged at the clamping seat to clamp and fix the outer wall end of the stainless steel cylinder. An outer round mechanism and an inner round mechanism are arranged to round the outer wall and the inner wall of the stainless steel cylinder during reciprocating motion.

[0004] The above-mentioned patent has the following disadvantages: it cannot perform dust removal on the weld before welding, and if there are impurities, it will cause insufficient sealing of the weld. SUMMARY

[0005] The purpose of the present application is to solve the problems existing in the prior art and provide a stainless steel kitchen utensil welding device.

[0006] In order to achieve the above-mentioned purpose, the present application adopts the following technical scheme: A stainless steel kitchen utensil welding device, comprising a base, the top of the base is provided with a support driving assembly for supporting a stainless steel cylinder, the outer wall of the top of the base is fixed with a gantry through bolts, and the top of the gantry is drivingly connected with a welding mechanism through a lifting assembly; The welding mechanism comprises a "U"-shaped frame and side frames fixed on both sides of the "U"-shaped frame through bolts. The inner wall of one side of the side frame is fixed with a gas blowing nozzle, and the inner wall of the other side of the side frame is fixedly connected with a smoke suction nozzle. The gas outlet of the smoke suction nozzle is connected with a filter, and one side of the "U"-shaped frame is provided with a gas driving mechanism. The gas inlet of the gas driving mechanism is connected to the filter, and the gas outlet of the gas driving mechanism is connected to the gas blowing nozzle. The inner side of the "U"-shaped frame is provided with a welding head for welding.

[0007] Preferably, both sides of the outer wall of the "U"-shaped frame are connected to a limiting wheel through an axle, the outer wall of the welding head is fixed with an external thread cylinder, the external thread cylinder is movably inserted into the middle inner wall of the "U"-shaped frame, and the outer wall of the "U"-shaped frame on both sides is fixed with an internal thread ring through a thread.

[0008] Further, the gas driving mechanism comprises a piston rod, a piston and a cylinder, the cylinder is fixed to the side wall of the "U"-shaped frame through bolts, the piston is slidably connected to the inner wall of the cylinder, the piston rod is fixed to the bottom outer wall of the piston through bolts, the side wall of the rodless cavity and the rod cavity of the cylinder is symmetrically provided with two communicating gas nozzles, the gas nozzles on the same side are connected to the same multi-way pipe on the other side, and the two multi-way pipes are connected to a filter and a blowing nozzle, respectively.

[0009] Based on the foregoing scheme, the outer wall of the axle is connected to a multi-protrusion cam through a key, and the bottom outer wall of the piston rod is rotatably connected to a roller, which is rollingly fitted to the outer wall of the multi-protrusion cam.

[0010] In the foregoing scheme, a better scheme is that the top of the piston is buckled with a spring, and the other end of the spring is buckled to the top inner wall of the cylinder.

[0011] As a further scheme of the application, the lifting assembly comprises a lifting plate and a telescopic device, the lifting plate is slidably connected to the top below of the gantry through a guide rod, the telescopic device is fixed to the top outer wall of the gantry through bolts, the telescopic end of the telescopic device is fixed to the top outer wall of the lifting plate through bolts, and the lifting plate is fixed to the top outer wall of the "U"-shaped frame through a connecting rod.

[0012] Meanwhile, the support driving assemblies are symmetrically arranged in multiple groups, and at least two groups of support driving assemblies are symmetrically arranged for supporting one cylinder, the support driving assembly comprises a fixed support frame, a support shaft and a support wheel, the support frame is fixed to the top outer wall of the base through bolts, the support wheel is rotatably connected to the top inner side of the support frame through the support shaft, and the support wheel is rollingly fitted to the cylinder.

[0013] As a preferred embodiment of the application, the top outer wall of the base is fixed with an electric motor through bolts, the output shaft of the electric motor is drivingly connected to a continuously variable transmission, the output shaft of the continuously variable transmission is drivingly fitted with a connecting shaft through a gear set, the connecting shaft is fixedly connected between the support shafts for supporting different cylinders, and the housing part of the continuously variable transmission is fixed to the top outer wall of the base.

[0014] Meanwhile, the housing part side wall of the electric motor is fixed with a generator rotor, and the outer wall of the output shaft of the electric motor is fixed with a generator stator matched with the generator rotor.

[0015] As a more optimal scheme of the present application: the electric energy output end of the generator rotor is connected to the wiring terminal of the welding head.

[0016] The present application has the following advantages: 1. The present application, by setting the smoking nozzle, the air blowing nozzle and the gas driving mechanism, on the one hand, the air blowing nozzle located at the upstream position of the welding head can remove impurities from the weld by blowing, thereby ensuring the welding quality, on the other hand, the smoking nozzle located at the downstream position of the welding head can suck and filter the smoke generated by welding, thereby preventing the pollution of the working environment.

[0017] 2. The present application, by setting the limiting wheel, which will contact and limit the cylinder on both sides of the weld, thereby strictly ensuring the distance between the welding head and the weld during welding, increasing the welding quality, and by setting the connection between the welding head and the "U" shaped frame as a combination of external thread cylinder and internal thread ring, thereby using the matching position of the internal thread ring and the external thread cylinder to adjust the distance between the welding head and the weld, further ensuring the welding quality.

[0018] 3. The present application, by setting the gas driving mechanism as a combination of piston rod, piston, cylinder and roller and multi-protrusion cam, thereby using the friction force of the contact between the limiting wheel and the top of the cylinder as the driving source to realize the driving of the entire gas circuit, thereby reducing the arrangement of the traditional air pump, and it can also realize the synchronous control of the blowing nozzle impurity removal, the smoking nozzle smoking and the cylinder rotation during welding, simplifying the control logic, and when the piston is raised and lowered, the smoking nozzle and the blowing nozzle receive negative pressure and positive pressure respectively, thereby ensuring the continuity of the entire gas driving and the effect of dust removal and smoking.

[0019] 4. The present application, by setting the generator stator and the generator rotor, using the cooperation of the generator stator and the generator rotor to supply power to the welding head, and the induced electromotive force of the generator rotor is proportional to the speed of the motor, that is, proportional to the speed of the cylinder, thereby ultimately realizing the function that the voltage of the welding head is positively related to the rotation speed of the inner cylinder, preventing the occurrence of overwelding or virtual welding, and improving the welding quality. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 The present application proposes a schematic diagram of the overall structure of a stainless steel kitchen utensil welding device; Figure 2 The present application proposes a schematic diagram of the welding mechanism structure of a stainless steel kitchen utensil welding device; Figure 3 The present application proposes a schematic diagram of the gas driving mechanism cross-section structure of a stainless steel kitchen utensil welding device; Figure 4 The present application proposes a schematic diagram of the pipeline structure of a stainless steel kitchen utensil welding device; Figure 5 A welding head mounting method structure diagram of a stainless steel kitchen utensil welding device is provided for the present application. Figure 6 A lifting assembly structure diagram of a stainless steel kitchen utensil welding device is provided for the present application. Figure 7 A support driving assembly structure diagram of a stainless steel kitchen utensil welding device is provided for the present application. Figure 8 A inner cylinder rotating driving and welding head power supply related component structure diagram of a stainless steel kitchen utensil welding device is provided for the present application.

[0021] In the figure: 1, base; 2, support driving assembly; 3, gantry; 4, lifting assembly; 5, welding mechanism; 6, U-shaped frame; 7, filter; 8, smoke suction nozzle; 9, wheel shaft; 10, limiting wheel; 11, air blowing nozzle; 12, side frame; 13, welding head; 14, roller; 15, piston rod; 16, piston; 17, cylinder body; 18, air nozzle; 19, one-way valve; 20, multi-way pipe; 21, lifting plate; 22, multi-protrusion cam; 23, external thread cylinder; 24, internal thread ring; 25, guide rod; 26, telescopic device; 27, support frame; 28, support shaft; 29, support wheel; 30, motor; 31, generator rotor; 32, stepless speed changer; 33, gear set; 34, connecting shaft; 35, generator stator. DETAILED DESCRIPTION

[0022] The technical solutions of the present application will be further described in detail below in combination with specific embodiments.

[0023] Embodiments of the present application are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as a limitation of the present application.

[0024] Embodiment 1: A stainless steel kitchen utensil welding device, as shown in Figures 1-8 illustrated, comprising a base 1, the top of the base 1 is provided with a support driving assembly 2 for supporting a stainless steel cylinder, the outer wall of the top of the base 1 is fixed with a gantry 3 through bolts, and the top of the gantry 3 is drivingly connected with a welding mechanism 5 through a lifting assembly 4 below.

[0025] The welding mechanism 5 comprises a "U" shaped frame 6 and side frames 12 fixed on both sides of the "U" shaped frame 6 by bolts, wherein the inner wall of one side frame 12 is fixed with a blowing nozzle 11, the inner wall of the other side frame 12 is fixed with a suction nozzle 8, the outlet of the suction nozzle 8 is connected with a filter 7, and one side of the "U" shaped frame 6 is provided with a gas driving mechanism, the gas inlet end of the gas driving mechanism is connected to the filter 7, and the gas outlet end of the gas driving mechanism is connected to the blowing nozzle 11.

[0026] The inner side of the "U" shaped frame 6 is provided with a welding head 13 for welding.

[0027] When the device is used, two cylinder bodies to be welded and connected are supported by the support driving assembly 2, then axial extrusion force is applied to the two cylinder bodies, so that the welding seams are aligned and located at the bottom of the welding head 13, then the lifting assembly 4 controls the welding head 13 to descend, so that the gantry 3 is located at a designed distance above the welding seam, then the support driving assembly 2 drives the two cylinder bodies to rotate synchronously, and the welding head 13 is electrified to perform welding during the rotation, and in the process of welding, the gas driving mechanism is pneumatically driven, which generates a gas passage from the suction nozzle 8 to the blowing nozzle 11, the blowing nozzle 11 is located at an upstream position of the welding, and the gas is discharged from the blowing nozzle 11 to clean impurities at the welding position, and at the same time, the suction nozzle 8 is located at a downstream position of the welding, and the smoke generated by the welding is sucked into the suction nozzle 8 and filtered by the filter 7.

[0028] The device is provided with the suction nozzle 8, the blowing nozzle 11 and the gas driving mechanism, on the one hand, the blowing nozzle 11 located at an upstream position of the welding head 13 can clean the welding seam by blowing, so as to ensure the welding quality, and on the other hand, the suction nozzle 8 located at a downstream position of the welding head 13 can suck and filter the smoke generated by the welding, so as to prevent the working environment from being polluted.

[0029] In order to solve the problem of welding quality, as shown in Figure 2 As shown, the outer walls of both sides of the "U" shaped frame 6 are rotationally connected with limit wheels 10 through wheel shafts 9, the outer wall of the welding head 13 is fixed with an external thread cylinder 23, the external thread cylinder 23 is movably inserted into the middle inner wall of the "U" shaped frame 6, and the outer walls of both sides of the "U" shaped frame 6 are connected with an internal thread ring 24 through threads.

[0030] Since the distance between the welding head 13 and the weld is also an important parameter of laser welding when welding, too close or too far will cause the focal point of the welding head 13 to deviate from the weld, affecting the welding quality, and the device, by setting the limiting wheel 10, which will contact and limit the cylinder on both sides of the weld, thereby strictly ensuring the distance between the welding head 13 and the weld during welding, increasing the welding quality, and by setting the connection between the welding head 13 and the "U" shaped frame 6 as a combination of the external threaded cylinder 23 and the internal threaded ring 24, the distance between the welding head 13 and the weld can be adjusted by the matching position of the internal threaded ring 24 and the external threaded cylinder 23, further ensuring the welding quality.

[0031] In order to solve the gas driving problem; as Figure 2 、 3 , 4, the gas driving mechanism includes a piston rod 15, a piston 16 and a cylinder 17, the cylinder 17 is fixed on the side wall of the "U" shaped frame 6 by bolts, the piston 16 is slidingly connected to the inner wall of the cylinder 17, the piston rod 15 is fixed to the bottom outer wall of the piston 16 by bolts, the side walls of the rodless cavity and the rod cavity of the cylinder 17 are symmetrically provided with two communicating gas nozzles 18, the same side gas nozzles 18 are connected with the same multi-way pipe 20 on the other side, and the two multi-way pipes 20 are connected with the filter 7 and the gas blowing nozzle 11 respectively.

[0032] The outer wall of the axle 9 is connected with a multi-protrusion cam 22 by a key, the bottom outer wall of the piston rod 15 is rotatably connected with a roller 14, the roller 14 is rollingly fitted on the outer wall of the multi-protrusion cam 22, and the top of the piston 16 is buckled with a spring, and the other end of the spring is buckled with the top inner wall of the cylinder 17.

[0033] During welding, the limiting wheel 10 will rotate due to contact with the outer wall of the cylinder, thereby driving the axle 9 to rotate, the rotation of the axle 9 drives the multi-protrusion cam 22 to rotate, so that the roller 14 drives the piston rod 15 to move up and down, thereby driving the piston 16 to move up and down, when the piston 16 moves upward, the gas in the rodless cavity of the cylinder 17 is extruded through the one-way valve 19 into the gas blowing nozzle 11 for discharge, at the same time, the rodless cavity of the cylinder 17 generates negative pressure, generates suction through the other one-way valve 19, and then inhales gas through the cigarette holder 8, when the piston 16 moves downward, the rod cavity of the cylinder 17 discharges to the gas blowing nozzle 11, and the rodless cavity of the cylinder 17 inhales gas from the cigarette holder 8.

[0034] The device, by setting the gas driving mechanism as the cooperation of the piston rod 15, the piston 16, the cylinder 17 and the roller 14 and the multi-protruding cam 22, uses the friction force of the contact between the limiting wheel 10 and the top of the cylinder as the driving source to realize the driving of the whole gas circuit, thereby reducing the arrangement of the traditional air pump, and it can also realize the synchronization control of the dust removal of the blowing nozzle 11, the smoking of the smoking nozzle 8 and the rotation of the cylinder during welding, simplify the control logic, and when the piston 16 is lifted, the smoking nozzle 8 and the blowing nozzle 11 receive negative pressure and positive pressure respectively, thereby ensuring the continuity of the whole gas driving, ensuring the dust removal and smoking effect.

[0035] In order to solve the lifting driving problem, as shown in Figure 6 The lifting assembly 4 includes a lifting plate 21 and a telescopic device 26, the lifting plate 21 is slidably connected to the top of the gantry 3 through a guide rod 25, the telescopic device 26 is fixed to the top outer wall of the gantry 3 through bolts, and the telescopic end of the telescopic device 26 is fixed to the top outer wall of the lifting plate 21 through bolts, and the lifting plate 21 is fixed to the top outer wall of the "U" shaped frame 6 through a connecting rod.

[0036] When the telescopic device 26 is telescoped, it can drive the lifting plate 21 to lift, thereby driving the "U" shaped frame 6 to lift.

[0037] In use, two cylinder bodies to be welded and connected are supported by the support driving assembly 2, then an axial extrusion force is applied to align the weld and position it at the bottom of the welding head 13, then the telescopic device 26 controls the welding head 13 to descend until the limiting wheel 10 contacts the top outer wall of the cylinder body and stops after maintaining a certain contact pressure, then the support driving assembly 2 drives the two cylinder bodies to rotate synchronously, and the welding head 13 is electrified to weld during rotation, and the limiting wheel 10 rotates to rotate the wheel shaft 9 and the multi-protruding cam 22, so that the roller 14 drives the piston rod 15 to move up and down, thereby driving the piston 16 to move up and down, when the piston 16 moves upward, the gas in the rodless cavity of the cylinder 17 is extruded to enter the blowing nozzle 11 through the one-way valve 19 and is discharged, and the rodless cavity of the cylinder 17 generates a negative pressure to generate suction through the one-way valve 19 on the other side, and then the gas is sucked through the smoking nozzle 8, and when the piston 16 moves downward, the rod cavity of the cylinder 17 discharges to the blowing nozzle 11, and the rodless cavity of the cylinder 17 inhales from the smoking nozzle 8, so that the blowing nozzle 11 is located at the upstream position of the welding, and the gas is discharged from the blowing nozzle 11 to clean the impurities at the weld position, and the smoking nozzle 8 is located at the downstream of the welding position, and the smoke generated by the welding is sucked into the smoking nozzle 8 and filtered through the filter 7.

[0038] Embodiment 2: A stainless steel kitchen utensil welding device, as shown in Figure 1 , Figure 7 andFigure 8 In order to solve the problem of rotating drive, the embodiment is improved on the basis of the embodiment 1, the support drive assembly 2 is arranged in a plurality of groups of symmetry, and at least two groups of symmetry are arranged for supporting a cylinder, the support drive assembly 2 comprises a fixed support frame 27, a support shaft 28 and a support wheel 29, the support frame 27 is fixed on the top outer wall of the base 1 by bolts, the support wheel 29 is rotatably connected to the top inner side of the support frame 27 by the support shaft 28, and the support wheel 29 is rollingly fitted on the cylinder.

[0039] The top outer wall of the base 1 is fixed with a motor 30 by bolts, the output shaft of the motor 30 is drivingly connected with a continuously variable transmission 32, the output shaft of the continuously variable transmission 32 is drivingly fitted with a connecting shaft 34 through a gear set 33, the connecting shaft 34 is fixedly connected between the support shafts 28 for supporting different cylinders, and the housing part of the continuously variable transmission 32 is fixed to the top outer wall of the base 1.

[0040] When the motor 30 is started, it can drive the output shaft of the continuously variable transmission 32 to rotate through the continuously variable transmission 32, so as to drive the connecting shaft 34 to rotate through the gear set 33, and then drive different groups of support wheels 29 to rotate, so as to drive two cylinders to rotate synchronously by friction.

[0041] The housing part of the motor 30 is fixed with a generator rotor 31, the output shaft of the motor 30 is fixed with a generator stator 35 matched with the generator rotor 31, and the power output end of the generator rotor 31 is connected to the terminal of the welding head 13.

[0042] When the motor 30 is started, its output shaft rotates, so that the generator stator 35 rotates relative to the generator rotor 31, an induced electromotive force is generated in the generator rotor 31 and applied to the welding head 13, and the magnitude of the induced electromotive force is positively correlated with the rotating speed of the motor 30.

[0043] Specifically, the embodiment can further include voltage stabilizers, inverters and other electrical elements, which are intended to apply stable DC voltage to the welding head 13 after changing the voltage generated by the generator rotor 31 to stable DC voltage and / or changing AC to DC.

[0044] Since the power of the welding head 13 is constant during the welding process, if the rotating speed of the cylinder is relatively fast, the stainless steel at the weld may be not welded and rotate away from the welding work, resulting in a virtual weld; if the rotating speed of the cylinder is relatively slow, the weld may be burned through due to long-time laser irradiation of the welding head 13, resulting in an overweld. Based on this, the device is provided with the generator stator 35 and the generator rotor 31, and the generator stator 35 and the generator rotor 31 are used to supply power to the welding head 13. The induced electromotive force of the generator rotor 31 is proportional to the rotating speed of the motor 30, that is, proportional to the rotating speed of the cylinder, so that the voltage of the welding head 13 is finally positively correlated with the rotating speed of the inner cylinder, preventing the occurrence of overwelding or virtual welding and improving the welding quality.

[0045] The above merely describes the preferred embodiments of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can make equivalent replacements or changes to the technical solutions and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered by the protection scope of the present application.

Claims

1. A stainless steel kitchenware welding device, comprising a base (1), characterized in that, The base (1) is provided with a support drive assembly (2) for supporting the stainless steel cylinder. The outer wall of the top of the base (1) is fixed with a gantry frame (3) by bolts. The bottom of the top of the gantry frame (3) is connected to a welding mechanism (5) by a lifting assembly (4). The welding mechanism (5) includes a "U"-shaped frame (6) and side frames (12) fixed to both sides of the "U"-shaped frame (6) by bolts. An air nozzle (11) is fixed to the inner wall of one side frame (12), and a smoking nozzle (8) is fixedly embedded in the inner wall of the other side frame (12). The air outlet of the smoking nozzle (8) is connected to a filter (7). A gas driving mechanism is provided on one side of the "U"-shaped frame (6). The air inlet of the gas driving mechanism is connected to the filter (7), and the air outlet of the gas driving mechanism is connected to the air nozzle (11). The inner side of the "U"-shaped frame (6) is provided with a welding head (13) for welding.

2. The stainless steel kitchenware welding device according to claim 1, characterized in that, The outer walls of both sides of the "U"-shaped frame (6) are rotatably connected to the limiting wheel (10) via the axle (9). The outer wall of the welding head (13) is fixed with an external threaded cylinder (23). The external threaded cylinder (23) is movably inserted into the middle inner wall of the "U"-shaped frame (6), and the external threaded cylinder (23) is located on both sides of the outer wall of the "U"-shaped frame (6) with an internal threaded ring (24) connected by threads.

3. The stainless steel kitchenware welding device according to claim 2, characterized in that, The gas drive mechanism includes a piston rod (15), a piston (16), and a cylinder (17). The cylinder (17) is fixed to the side wall of the "U"-shaped frame (6) by bolts. The piston (16) is slidably connected to the inner wall of the cylinder (17). The piston rod (15) is fixed to the bottom outer wall of the piston (16) by bolts. The side walls of the rodless chamber and the rod chamber of the cylinder (17) are symmetrically provided with two connected air nozzles (18). The other side of the air nozzles (18) located on the same side is connected to the same multi-port pipe (20). The two multi-port pipes (20) are respectively connected to the filter (7) and the air nozzle (11).

4. The stainless steel kitchenware welding device according to claim 3, characterized in that, The outer wall of the axle (9) is connected by a key to a multi-protruding cam (22), and the bottom outer wall of the piston rod (15) is rotatably connected to a roller (14), which rolls and engages with the outer wall of the multi-protruding cam (22).

5. A stainless steel kitchenware welding device according to claim 4, characterized in that, The top of the piston (16) is fastened with a spring, and the other end of the spring is fastened to the top inner wall of the cylinder (17).

6. The stainless steel kitchenware welding device according to claim 1, characterized in that, The lifting assembly (4) includes a lifting plate (21) and a telescopic device (26). The lifting plate (21) is slidably connected to the top of the gantry frame (3) via a guide rod (25). The telescopic device (26) is fixed to the top outer wall of the gantry frame (3) by bolts, and the telescopic end of the telescopic device (26) is fixed to the top outer wall of the lifting plate (21) by bolts. The lifting plate (21) is fixed to the top outer wall of the "U"-shaped frame (6) via a connecting rod.

7. A stainless steel kitchenware welding device according to claim 1, characterized in that, The support drive assembly (2) is arranged in multiple symmetrical groups, and at least two sets of support drive assemblies (2) for supporting a cylinder are arranged symmetrically. The support drive assembly (2) includes a fixed support frame (27), a support shaft (28) and a support wheel (29). The support frame (27) is fixed to the top outer wall of the base (1) by bolts. The support wheel (29) is rotatably connected to the top inner side of the support frame (27) through the support shaft (28), and the support wheel (29) rolls with the cylinder.

8. A stainless steel kitchenware welding device according to claim 7, characterized in that, The top outer wall of the base (1) is fixed with an electric motor (30) by bolts. The output shaft of the electric motor (30) is connected to a continuously variable transmission (32). The output shaft of the continuously variable transmission (32) is connected to a connecting shaft (34) through a gear set (33). The connecting shaft (34) is fixedly connected to the support shaft (28) used to support different cylinders. The housing part of the continuously variable transmission (32) is fixed to the top outer wall of the base (1).

9. A stainless steel kitchenware welding device according to claim 8, characterized in that, The generator rotor (31) is fixed to the side wall of the housing of the motor (30), and the generator stator (35) that cooperates with the generator rotor (31) is fixed to the outer wall of the output shaft of the motor (30).

10. A stainless steel kitchenware welding device according to claim 9, characterized in that, The power output end of the generator rotor (31) is connected to the wiring terminal of the welding head (13).

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