Laser welding equipment and process for processing separated electric chafing dish

Abstract

The invention discloses laser welding equipment and technology for processing a separated electric chafing dish, and relates to the technical field of welding equipment.The laser welding equipment comprises a displacement assembly, a welding head, a fixing device and a control module, the fixing device comprises a base, a fixing base, a first clamp and a second clamp, and the fixing base is used for fixing the separated electric chafing dish; the first clamp is used for clamping and pressing a partition plate of the separated electric chafing dish downwards to press the partition plate into a pot body to a preset position, and the second clamp is used for pushing the side wall of the pot body of the separated electric chafing dish to be attached to the two ends of the partition plate; the welding head moves above the fixed seat and is used for realizing laser welding between a partition plate of the separated electric hot pot fixed on the fixed seat and the side wall of a pot body and laser welding between the bottom of the partition plate and the bottom of the inner side of the pot body; by arranging the structure, continuous laser welding can be conducted on the two ends of the partition plate and the side wall of the pot body and the bottom of the partition plate and the inner side bottom of the pot body, sealing performance is good, machining errors are small, and therefore the machining efficiency is improved, and the rejection rate is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of welding equipment, in particular to a laser welding equipment and process for processing a divided electric chafing dish. BACKGROUND

[0002] The divided electric chafing dish has been widely used in families and catering industries because it can realize the separate cooking of different food materials in the same pot body. The existing divided electric chafing dish is usually composed of a metal pot body and a metal partition plate. The partition plate needs to be firmly connected with the side wall and the bottom of the pot body to ensure that there is no problem such as odor mixing, leakage or partition plate loosening when cooking the electric chafing dish. At present, the industry generally adopts spot welding, manual welding or simple welding fixture for welding and processing of the partition plate, but there are still the following deficiencies:

[0003] 1. The traditional spot welding is limited by the welding method and only spot welds the two ends of the partition plate and the side wall of the pot body, so that the sealing performance of the bottom of the partition plate is poor, leakage is easy to occur during use, and the middle of the traditional divided electric chafing dish pot body is downwardly concave, the bottom is difficult to adopt the process of laser welding, the error is large, and the scrap rate is high.

[0004] 2. The existing welding tooling generally only realizes simple clamping, and it is difficult to ensure the stable posture of the partition plate before welding, especially the fit degree of the two ends of the partition plate and the side wall of the pot body is greatly affected by human operation, and the production consistency is poor.

[0005] 3. The existing welding equipment is mostly a single axial movement device, which is difficult to meet the needs of accurately adjusting the position and incidence angle of the laser welding head in different heights, different angles and multiple directions for partition plate welding, resulting in uneven weld formation or even unable to weld complex parts. SUMMARY

[0006] The purpose of the present application is to provide a laser welding equipment and process for processing a divided electric chafing dish. The laser welding equipment and process for processing a divided electric chafing dish of the present application can perform high-precision, full-position and high-stability laser welding on the divided electric chafing dish, so as to improve the welding efficiency, processing precision and product consistency.

[0007] The application is achieved by the technical scheme as follows: a laser welding equipment for processing a partition type electric chafing dish, comprising a rack, a displacement assembly, a welding head, a fixing device and a control module, the displacement assembly and the fixing device are connected to the rack, the displacement assembly, the welding head and the fixing device are controlled by the control panel; the fixing device comprises a base, a fixing seat, a first clamp and a second clamp, the fixing seat is arranged on the base, the fixing seat is used to fix the partition type electric chafing dish, the first clamp is arranged above the fixing seat, the first clamp is used to clamp and press down the partition plate of the partition type electric chafing dish, so that the partition plate is pressed into the inside of the pot body to a preset position, the second clamp is arranged on both sides of the fixing seat, and the second clamp is used to push the pot body side wall and the two ends of the partition plate of the partition type electric chafing dish to be attached; the welding head is rotationally connected to the displacement assembly, and the welding head moves above the fixing seat during processing, so as to realize laser welding of the partition plate and the pot body side wall of the partition type electric chafing dish fixed on the fixing seat and laser welding of the bottom of the partition plate and the inside bottom of the pot body.

[0008] Preferably, a groove is arranged on the fixing seat.

[0009] Preferably, a plurality of positioning grooves are arranged in the groove, and the positioning grooves are matched and connected with positioning protrusions of the partition type electric chafing dish.

[0010] Preferably, a first clamp is arranged above the fixing seat, the first clamp comprises a fixed table, a clamping piece, a first driving member and a second driving member, the clamping piece is telescopically connected to one side of the fixed table, the control panel controls the first driving member and the second driving member, the first driving member first drives the clamping piece to approach the fixed table to clamp the partition plate of the partition type electric chafing dish, and then the second driving member controls the fixed table and the clamping piece to move downward together.

[0011] Preferably, an elastic silica gel pad is arranged on the top of the fixed table, the elastic silica gel pad extends in the direction of the clamping piece, the clamping piece is correspondingly provided with a clamping groove, and when the clamping piece approaches the fixed table, the elastic silica gel pad is clamped in the clamping groove.

[0012] Preferably, guide columns are arranged on both sides of the fixing seat, a fixed plate and a moving plate are arranged between the two guide columns, the fixed plate is fixedly connected to the top end of the guide column, and the moving plate can move up and down on the guide column; the fixed table is fixedly connected below the moving plate, the first driving member is fixed to the top of the fixed table, and the first driving member is connected to the clamping piece through a connecting rod, the first driving member is one of a pneumatic cylinder, an electric push rod and a servo slide; the second driving member is arranged above the fixed plate, the second driving member is connected to the moving plate through a push rod, and the second driving member is one of a pneumatic cylinder, an electric cylinder and a servo slide.

[0013] Preferably, the height of the fixing seat is less than the height of the divided electric chafing dish.

[0014] Preferably, the fixing seat is provided with a second clamp on each side, and the two second clamps are symmetrically arranged.

[0015] Preferably, the second clamp comprises a limiting block, a pressing block and a third driving member, the limiting block is connected to the third driving member, the pressing block is fixedly connected to one side of the limiting block away from the third driving member, the control panel controls the third driving member, after the partition plate of the divided electric chafing dish is pressed into the pot body to the preset position, the third driving member moves the limiting block and the pressing block towards the pot body side wall, the pressing block abuts against the outside of the pot body side wall, and the pressing block corresponds to the end of the partition plate, and the two ends of the side of the limiting block close to the pressing block abut against the convex edges on the top of the pot body side wall and the fixing seat respectively, thereby pushing the pot body side wall and the partition plate of the divided electric chafing dish to be attached to each other.

[0016] Preferably, a hand wheel is arranged between the fixing seat and the base, so that the fixing seat can be manually fine-tuned at any time.

[0017] Preferably, the displacement assembly comprises an X moving shaft, a Y moving shaft, a Z moving shaft, a rotating a shaft and a rotating b shaft, the Y moving shaft is slidingly connected to the X moving shaft, the Z moving shaft is slidingly connected to the Y moving shaft, the rotating a shaft is rotatably connected to the Z moving shaft, the rotating b shaft is rotatably connected to the rotating a shaft, and the welding head is fixedly connected to the rotating b shaft.

[0018] Preferably, the rotating a shaft comprises a rotating a shaft support and a rotating a shaft body, the rotating a shaft support is fixedly connected to the Z moving shaft, and the rotating a shaft body is rotatably connected to the rotating a shaft support, the rotating a shaft body is driven by a servo rotating motor or a stepping rotating motor, the rotating a shaft is provided with an angle sensor, and the rotating a shaft can rotate within a range of -30° to 90°.

[0019] Preferably, the rotating b shaft comprises a rotating b shaft support fixed to the end of the rotating a shaft and a rotating b shaft body connected to the rotating b shaft support through a bearing, the outer end of the rotating b shaft body is fixedly connected to the welding head, and the rotating b shaft enables the welding head to rotate around the rotating b shaft body, so that the welding head can maintain the optimal light beam incidence posture during welding.

[0020] Preferably, the welding head is an integrated laser welding assembly, comprising a fiber interface, a collimation module, a focusing module, a protective lens assembly, a nozzle assembly, a temperature monitoring module and a cooling module; the welding head is connected with a laser, the fiber interface is connected with the upper housing of the welding head through a threaded structure, the fiber interface has a dustproof cap and an internal fiber end face pressing structure, and a ceramic positioning ring is arranged inside the interface; the collimation module is arranged below the fiber interface to ensure that the center of the light beam is consistent with the central axis of the entire welding head; the focusing module is arranged below the collimation module and is used for focusing the collimated light beam to the welding area, the focusing module is connected with the collimation module through threaded cooperation to facilitate disassembly and maintenance; the protective lens assembly is arranged at the front end of the focusing module; the nozzle assembly is installed at the bottom of the welding head, and the nozzle assembly is connected with the protective lens assembly; the temperature monitoring module is arranged on one side of the nozzle assembly; and the welding head is provided with the cooling module to ensure long-term stable operation of the optical lens and the fiber interface.

[0021] The application provides a process for processing a partition type electric chafing dish.

[0022] S1, workpiece positioning and fixing

[0023] The partition type electric chafing dish is placed in the fixing seat of the fixing device, the bottom of the pot body is embedded in the groove of the fixing seat, the positioning grooves arranged in the groove are matched with the positioning protrusions on the bottom of the pot body to complete the positioning of the pot body, and the structure that the height of the fixing seat is less than the height of the pot body is used to make the convex edges on the top of the sidewall of the pot body located above the fixing seat.

[0024] S2, pressing the partition plate

[0025] The first driving member of the first clamp is started to move the clamping piece transversely to the fixed table and clamp the partition plate, then the second driving member drives the moving plate and the fixed table to move downward, so that the partition plate is pressed into the pot body to a preset position;

[0026] S3, sidewall adhesion

[0027] After the partition plate is pressed into the preset welding position, the third driving member of the second clamp is started to move the limiting block and the pressing block towards the sidewall of the pot body, the pressing block abuts against the outside of the sidewall of the pot body, and the limiting block abuts against the convex edges on the top of the sidewall of the pot body and the fixing seat respectively, so as to push the sidewall of the pot body to completely adhere to the two ends of the partition plate.

[0028] S4, welding head positioning

[0029] The welding head is moved to the welding position of the partition plate and the sidewall of the pot body through the X moving shaft, the Y moving shaft and the Z moving shaft of the displacement assembly, and then the incident angle of the welding head is adjusted through the rotation a shaft and the rotation b shaft.

[0030] S5, side wall welding

[0031] The laser welding device for processing the partition type electric chafing dish comprises a laser welding head, a nozzle assembly, a first clamp, a second clamp, a first driving element, a second driving element, a displacement assembly and a control system.

[0032] S6, bottom welding

[0033] After the side wall welding is completed, the displacement assembly drives the welding head to descend along the Z moving shaft and adjusts the rotation a shaft and the rotation b shaft to a new incident angle, so that the welding head performs laser welding on the inside of the bottom of the partition plate and the bottom of the pot body, and the welding and fixation between the bottom of the partition plate and the bottom of the pot body are completed.

[0034] S7, cooling and unloading

[0035] The welding head is closed, the nozzle assembly continues to release the protective gas to cool the weld, and after the temperature of the weld decreases to a safe range, the first clamp and the second clamp are released in sequence, so that the restriction and the pressing force are removed, and the completed partition type electric chafing dish is taken out.

[0036] Preferably, the partition type electric chafing dish comprises a pot body, a partition plate, a handle and a heating base, the pot body comprises an integrally formed pot body side wall and a pot body bottom, the top of the pot body side wall is provided with a convex edge, and the two ends of the partition plate are welded to the inside of the pot body side wall, and the bottom of the partition plate is welded to the inside of the pot body bottom.

[0037] The laser welding device for processing the partition type electric chafing dish has the following beneficial effects:

[0038] The laser welding device for processing the partition type electric chafing dish comprises a laser welding head, a nozzle assembly, a first clamp, a second clamp, a first driving element, a second driving element, a displacement assembly and a control system.

[0039] The application discloses a laser welding equipment and process for processing a partition type electric chafing dish.

[0040] The application discloses a laser welding equipment and process for processing a partition type electric chafing dish, and the process realizes continuous, stable laser welding of a partition plate and a side wall and a bottom of a pot through accurate positioning of a workpiece, controlled pressing of the partition plate, active adhesion of the side wall of the pot and multi-axis posture adjustment of a welding head under cooperation of the laser welding equipment. The process effectively solves the problems that a traditional spot welding mode is difficult to weld the bottom of the partition plate, the welding seam is discontinuous and welding consistency is poor, reliably connects the partition plate at both ends and the bottom, significantly improves the structural strength and use reliability of the whole pot, reduces manual intervention through automatic clamping and multi-degree-of-freedom welding positioning, improves processing precision and production efficiency, reduces rework rate and manufacturing cost, is suitable for large-scale and standardized production and has good industrial application value and market promotion prospect.

[0041] The application discloses a laser welding equipment and process for processing a partition type electric chafing dish, and the process realizes continuous, stable laser welding of a partition plate and a side wall and a bottom of a pot through accurate positioning of a workpiece, controlled pressing of the partition plate, active adhesion of the side wall of the pot and multi-axis posture adjustment of a welding head under cooperation of the laser welding equipment. The process effectively solves the problems that a traditional spot welding mode is difficult to weld the bottom of the partition plate, the welding seam is discontinuous and welding consistency is poor, reliably connects the partition plate at both ends and the bottom, significantly improves the structural strength and use reliability of the whole pot, reduces manual intervention through automatic clamping and multi-degree-of-freedom welding positioning, improves processing precision and production efficiency, reduces rework rate and manufacturing cost, is suitable for large-scale and standardized production and has good industrial application value and market promotion prospect. BRIEF DESCRIPTION OF DRAWINGS

[0042] Figure 1 It is a whole structure schematic view of the laser welding equipment for processing the partition type electric chafing dish of the application.

[0043] Figure 2 It is a top view structure schematic view of the structure shown in Figure 1

[0044] Figure 3 It is a structure schematic view of the fixed device.

[0045] Legend:​

[0046] 1, rack; 2, displacement assembly; 201, X moving shaft; 202, Y moving shaft; 203, Z moving shaft; 204, rotating a shaft; 2041, rotating a shaft support; 2042, rotating a shaft body; 205, rotating b shaft; 2051, rotating b shaft support; 2052, rotating b shaft body; 3, welding head; 4, fixing device; 401, base; 402, fixing seat; 403, first clamp; 4031, fixed table; 40311, elastic silica gel pad; 4032, clamping piece; 4033, first driving piece; 4034, second driving piece; 404, second clamp; 4041, limiting block; 4042, pressing block; 4043, third driving piece; 405, guide column; 406, fixed plate; 407, moving plate; 5, control panel. DETAILED DESCRIPTION

[0047] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0048] Embodiment:

[0049] The laser welding equipment for processing the partition type electric chafing dish is used to process the partition type electric chafing dish. The partition type electric chafing dish comprises a pot body, a partition plate, a handle and a heating base. The pot body comprises an integrally formed pot body side wall and a pot body bottom. The pot body side wall top is provided with a convex edge which protrudes outward from the pot body side wall. The partition plate is laser welded at both ends on the inner side of the pot body side wall. The partition plate bottom is laser welded on the inner side of the pot body bottom. The pot body side wall is connected with the handle. The pot body bottom is placed on the heating base. The pot body bottom is provided with a plurality of fixing protrusions which are used to fit the heating base.

[0050] Reference Figures 1 to 3The application provides a laser welding equipment for processing a partition type electric chafing dish, which comprises a rack 1, a displacement assembly 2, a welding head 3, a fixing device 4 and a control module 5, the displacement assembly 2 and the fixing device 4 are connected to the rack 1, and the displacement assembly 2, the welding head 3 and the fixing device 4 are controlled by the control panel 5; the fixing device 4 comprises a base 401, a fixing seat 402, a first clamp 403 and a second clamp 404, the fixing seat 402 is arranged on the base 401, the fixing seat 402 is used for fixing the partition type electric chafing dish, the first clamp 403 is arranged above the fixing seat 402, the first clamp 403 is used for clamping and pressing downward the partition plate of the partition type electric chafing dish, so that the partition plate is pressed into the inside of the pot body to a preset position, the second clamp 404 is arranged on the two sides of the fixing seat 402, and the second clamp 404 is used for pushing the pot body side wall of the partition type electric chafing dish to be attached to the two ends of the partition plate; the welding head 3 is rotationally connected to the displacement assembly 2, and the welding head 3 moves above the fixing seat 402 during processing, so as to realize laser welding of the partition plate and the pot body side wall of the partition type electric chafing dish fixed on the fixing seat 402 and laser welding of the bottom of the partition plate and the inside bottom of the pot body; during operation, the equipment can realize automatic welding of the partition plate and the pot body side wall and the bottom, manual repeated adjustment is not needed, full-automatic production is realized, in addition, the equipment can greatly improve the production efficiency of the partition type electric chafing dish, reduce the labor cost, improve the weld consistency, and is particularly suitable for batch production, and improves the product yield and the enterprise competitiveness.

[0051] In the application, the control module 5 is a core control unit of the whole laser welding equipment, which uniformly and coordinately controls each driving part in the displacement assembly 2, the welding head 3 and the fixing device 4 through a control program pre-written and stored in the control module. During operation, the control module 5 first reads the corresponding partition plate type, welding path and motion parameters according to the setting parameters or preset process mode of the operator on the control panel, wherein the partition plate can be a linear partition plate or a curved partition plate, and the control module 5 realizes adaptive processing of different partition plate structures through different program parameters and motion trajectory settings.

[0052] Further, in another embodiment, a groove is arranged on the fixing seat 402, and the groove is used for clamping the pot body bottom of the partition type electric chafing dish. During operation, the pot body is stably fixed, movement or inclination during processing is avoided, the position accuracy when the partition plate is pressed into the pot body bottom is ensured, the weld quality during the welding process is stable, and the rework and the defective rate are reduced.

[0053] Further, in another embodiment, a plurality of positioning grooves are arranged in the groove, the positioning grooves are matched and connected with positioning protrusions of the partition type electric chafing dish, the positioning grooves can be more fitted to the bottom of the partition type electric chafing dish through design, movement during processing is avoided, processing stability is increased, and the processing accuracy of the partition type electric chafing dish is improved.

[0054] Further, in another embodiment, a first clamp 403 is arranged above the fixing base 402, the first clamp 403 comprising a fixing table 4031, a clamping piece 4032, a first driving member 4033 and a second driving member 4034, the clamping piece 4032 being telescopically connected to one side of the fixing table 4031, the control panel 5 controlling the first driving member 4033 and the second driving member 4034, the first driving member 4033 first driving the clamping piece 4032 to approach the fixing table 4031 to clamp the partition plate of the partition type electric chafing dish, and then the second driving member 4034 controls the fixing table 4031 and the clamping piece 4032 to move downward together, so as to press the partition plate of the partition type electric chafing dish and press the partition plate into the inside of the pot body to a preset position.

[0055] The first clamp 403 is operated by the telescopic clamping piece 4032 and the double driving members, first clamping the partition plate horizontally, and then pressing it downward to a preset position, so as to automatically complete the positioning and pressing of the partition plate, which can adapt to partition plates of different thicknesses, reduce manual operation, ensure complete penetration of the weld, improve production efficiency, adapt to multiple models of chafing dishes, increase production flexibility, and reduce enterprise equipment investment costs.

[0056] Further, in another embodiment, the top of the fixing table 4031 is provided with an elastic silica gel pad 40311 extending in the direction of the clamping piece 4032, and the clamping piece 4032 is correspondingly provided with a clamping groove, and when the clamping piece 4032 approaches the fixing table 4031, the elastic silica gel pad 40311 is clamped in the clamping groove.

[0057] The elastic silica gel pad 40311 is arranged on the top of the fixing table 4031, and the clamping piece 4032 is clamped to generate buffering and self-adaptive pressing, which can absorb slight deviations and vibrations during operation, protect the surface of the pot body from being scratched or indented, improve the welding quality and appearance of the finished product, reduce rework and after-sales problems, and be suitable for the high-end kitchenware market.

[0058] Further, in another embodiment, the two sides of the fixing seat 402 are provided with guide columns 405, and a fixed plate 406 and a moving plate 407 are arranged between the two guide columns 405, the fixed plate 406 is fixedly connected to the top end of the guide column 405, and the moving plate 407 can move up and down on the guide column 405; the fixed table 4031 is fixedly connected below the moving plate 407, the first driving member 4033 is fixed to the top of the fixed table 4031, and the first driving member 4033 is connected with the clamping piece 4032 through the connecting rod, and the first driving member 4033 is one of a pneumatic cylinder, an electric push rod and a servo sliding table; the second driving member 4034 is arranged above the fixed plate 406, the second driving member 4034 is connected with the moving plate 407 through a push rod, and the second driving member 4034 is one of a pneumatic cylinder, an electric cylinder and a servo sliding table.

[0059] The guide column 405, the fixed plate 406 and the moving plate 407 are designed to stabilize the positioning of the first clamp 403 during the up-down movement, and the first and second driving members can accurately control the clamping and pressing actions, so that the baffle pressing precision is high, the welding angle consistency is good, the welding quality and the production efficiency are significantly improved, and the automation demand of high production lines is met, and the risk of manual intervention and misoperation is reduced.

[0060] Further, in another embodiment, the height of the fixing seat 402 is less than the height of the divided electric cooker. That is, during processing, the divided electric cooker is placed in the fixing seat 402, and at least the convex edge of the top of the side wall of the pot body is located above the fixing seat 402. The two sides of the fixing seat 402 are provided with second clamps 404, and the two second clamps 404 are symmetrically arranged, the second clamp 404 comprises a limiting block 4041, a pressing block 4042 and a third driving member 4043, the limiting block 4041 is connected with the third driving member 4043, the pressing block 4042 is fixedly connected to one side of the limiting block 4041 away from the third driving member 4043, and the control panel 5 controls the third driving member 4043, after the baffle of the divided electric cooker is pressed into the pot body to the preset position, the third driving member 4043 moves the limiting block 4041 and the pressing block 4042 towards the side wall of the pot body, the pressing block 4042 abuts against the outside of the side wall of the pot body, and the pressing block 4042 corresponds to the end of the baffle, and the two ends of the side close to the pressing block 4042 of the limiting block 4041 abut against the convex edge of the top of the side wall of the pot body and the fixing seat 402 respectively, and the side wall of the pot body of the divided electric cooker is pushed to adhere to the two ends of the baffle.

[0061] The fixed seat 402 is lower than the height of the pot body, so that the pressing block 4042 of the second clamp 404 pushes the pot body side wall to fit the end of the partition, and because the top of the pot body side wall has a protrusion, when the pressing block 4042 fits the pot body, the limiting block 4041 can resist the protrusion on the top of the pot body side wall and the fixed seat 402, preventing the pot body from being deformed due to extrusion, ensuring perfect fitting of the partition and the side wall during operation, reducing the risk of missed welding and false welding, improving product consistency and durability, and meeting the quality requirements of high-end brand separation hot pots.

[0062] Further, in another embodiment, a hand wheel is provided between the fixed seat 402 and the base 401, which can be used to manually adjust the fixed seat 402 at any time. The operation is simple, and the position can be quickly adjusted for different models of pot bodies, improving the versatility and flexible production capacity of the equipment, suitable for multiple models of hot pot production needs, and improving market adaptability.

[0063] Further, in another embodiment, the displacement assembly 2 includes an X moving shaft 201, a Y moving shaft 202, a Z moving shaft 203, a rotation a shaft 204, and a rotation b shaft 205. The Y moving shaft 202 is slidingly connected to the X moving shaft 201, the Z moving shaft 203 is slidingly connected to the Y moving shaft 202, the rotation a shaft 204 is rotationally connected to the Z moving shaft 203, the rotation b shaft 205 is rotationally connected to the rotation a shaft 204, and the welding head 3 is fixedly connected to the rotation b shaft 205. During operation, the welding head can be precisely positioned and angularly adjusted in three-dimensional space, allowing the welding head to adapt to complex pot body welding angles and handle different shapes and sizes of electric hot pots, further improving production efficiency and product quality.

[0064] Further, in another embodiment, the rotation a shaft 204 includes a rotation a shaft support 2041 and a rotation a shaft body 2042. The rotation a shaft support 2041 is fixedly connected to the Z moving shaft 203, and the rotation a shaft body 2042 is rotationally connected to the rotation a shaft support 2041. The rotation a shaft body 2042 is driven by a servo rotation motor or a step rotation motor. The rotation a shaft 204 is provided with an angle sensor, and the rotation a shaft 204 can rotate within a range of -30° to 90°. During operation, the laser beam can be optimally incident for welding, improving the precision of the weld, especially for curved side walls or bottom welding, achieving high-quality appearance and strength, and enhancing product competitiveness.

[0065] Further, in another embodiment, the rotating b-axis 205 includes a rotating b-axis bracket 2051 fixed at the end of the rotating a-axis and a rotating b-axis body 2052 connected to the rotating b-axis bracket 2051 through bearings, and the outer end of the rotating b-axis body 2052 is fixedly connected with the welding head 3. The rotating b-axis 205 enables the welding head 3 to rotate around the rotating b-axis body 2052, so that the welding head 3 can maintain the optimal light beam incidence posture during welding, automatically adjust the angle according to the curvature of the pot body during operation, ensure the consistency of the weld, improve the yield of good products, and meet the requirements of automation and high-precision production.

[0066] Further, in another embodiment, the welding head 3 is an integrated laser welding assembly, which includes a fiber interface, a collimation module, a focusing module, a protective lens assembly, a nozzle assembly, a temperature monitoring module, and a cooling module. The welding head 3 is connected with a laser, the fiber interface is connected with the upper housing of the welding head 3 through a threaded structure, and is used to connect with the output fiber of the laser. The fiber interface has a dustproof cap and an internal fiber end face pressing structure to ensure stable input of the laser beam and reduce coupling loss. A ceramic positioning ring is arranged inside the interface to keep the fiber end face and the collimation lens coaxial. The collimation module is arranged below the fiber interface and includes a collimation lens group, a lens positioning clamp ring, and a coaxial adjustment structure that can be finely adjusted. The collimation lens is a plano-convex or biconvex lens, which is used to collimate the divergent laser beam from the fiber into a parallel light beam. The lens group is installed in a precisely machined metal cylinder, and the optical axis is calibrated through three equally spaced fine adjustment screws to ensure that the center of the light beam is consistent with the center axis of the entire welding head and reduce deviation. The focusing module is arranged below the collimation module and is used to focus the collimated light beam to the welding area. The focusing module is connected with the collimation module through threaded cooperation to facilitate disassembly and maintenance. The protective lens assembly is arranged at the front end of the focusing module to prevent the metal splashes from the welding pool from polluting the optical cavity. The nozzle assembly is installed at the bottom of the welding head 3 and is connected with the protective lens assembly to provide protective gas to protect the weld area and improve the forming. The temperature monitoring module is arranged on one side of the nozzle assembly and is used to obtain the temperature data of the welding area. The welding head 3 is provided with a cooling module to ensure the long-term stable operation of the optical lens and the fiber interface.

[0067] During operation, the welding head 3 realizes stable transmission of laser, focusing of light beam, protection of weld, temperature monitoring, and cooling functions to ensure the stability of continuous welding for a long time. The integrated welding head can reduce equipment maintenance cost, improve welding quality and productivity, and is suitable for large-scale automated production.

[0068] The application provides a process for processing a partition type electric chafing dish, which uses a laser welding device for processing a partition type electric chafing dish, and the process for processing a partition type electric chafing dish comprises the following steps:

[0069] S1, workpiece positioning and fixing

[0070] The partition type electric chafing dish is placed in the fixing seat 402 of the fixing device 4, the bottom of the pot body is embedded in the groove of the fixing seat 402, the positioning grooves arranged in the groove are matched with the positioning protrusions on the bottom of the pot body, the positioning of the pot body is completed, the structure that the height of the fixing seat 402 is less than the height of the pot body is used, and the convex edges on the top of the side wall of the pot body are located above the fixing seat 402;

[0071] S2, pressing the partition plate

[0072] The first driving part 4033 of the first clamp 403 is started, the clamping piece 4032 is moved transversely to the direction of the fixing table 4031 and clamps the partition plate, then the second driving part 4034 drives the moving plate 407 and the fixing table 4031 to move downward, so that the partition plate is pressed into the inside of the pot body to a preset position;

[0073] S3, side wall adhesion

[0074] After the partition plate is pressed into the preset welding position, the third driving part 4043 of the second clamp 404 is started, the limiting block 4041 and the pressing block 4042 are moved towards the side wall of the pot body, the pressing block 4042 abuts against the outside of the side wall of the pot body, and the limiting block 4041 abuts against the convex edges on the top of the side wall of the pot body and the fixing seat 402 respectively, so that the side wall of the pot body and the two ends of the partition plate are completely adhered;

[0075] S4, welding head positioning

[0076] The welding head 3 is moved to the welding position of the partition plate and the side wall of the pot body through the X moving shaft 201, the Y moving shaft 202 and the Z moving shaft 203 of the displacement assembly 2, and then the incident angle of the welding head 3 is adjusted through the rotation a shaft 204 and the rotation b shaft 205;

[0077] S5, side wall welding

[0078] The laser beam emitted by the welding head 3 is collimated and focused towards the joint between the partition plate and the side wall of the pot body, a continuous weld is formed between the two ends of the partition plate and the side wall of the pot body, and reliable welding between the two ends of the partition plate and the inside of the side wall of the pot body is realized;

[0079] S6, bottom welding

[0080] After the sidewall welding is completed, the displacement assembly 2 drives the welding head 3 to descend along the Z moving shaft 203 and adjusts the rotation a shaft 204 and the rotation b shaft 205 to a new incident angle, so that the welding head 3 performs laser welding on the bottom of the baffle and the inner side of the bottom of the pot, and the welding and fixing between the bottom of the baffle and the bottom of the pot are completed;

[0081] S7, cooling and unloading

[0082] The welding head 3 is closed, the nozzle assembly continues to release the protective gas to cool the weld, and after the temperature of the weld decreases to a safe range, the first clamp 403 and the second clamp 404 are released in sequence, so that the restriction and the pressing force are removed, and the finished divided electric chafing dish is taken out.

[0083] The process for processing the divided electric chafing dish is implemented based on a special laser welding device, the divided electric chafing dish is precisely positioned stably and repeatedly before welding, reliable limiting cooperation is formed between the bottom of the pot and the fixing seat, and therefore the position consistency of the workpiece in the whole welding process is ensured; on this basis, the baffle is step by step controlled by the first clamp 403 to be clamped first and then pressed down, so that the baffle can be accurately pressed into the inside of the pot to a preset welding position under controllable stress, and the problems of baffle deflection, lifting or uneven stress are avoided; then the second clamp 404 is used to apply a directional pushing force to the sidewall of the pot from the outside of the pot, so that the sidewall of the pot and the two ends of the baffle always maintain a close fit before welding, and stable and consistent welding gap conditions are provided for subsequent laser welding. In the welding process, the multi-axis linkage of the displacement assembly 52 and the adjustment of the incident angle of the welding head 3 by the rotation shaft enable the welding head 3 to perform laser welding on the combined parts of the baffle and the sidewall of the pot and the inner side of the bottom of the baffle and the bottom of the pot respectively in the optimal posture, so that the bottom welding of the baffle, which is difficult to be completed by a traditional welding method, is realized, and a continuous, uniform and high-strength weld is formed. By this process, not only the overall strength and sealing reliability of the connection structure of the baffle and the pot of the divided electric chafing dish are significantly improved, but also the welding deformation, virtual welding and leakage welding phenomena are effectively reduced, and the consistency and yield of the product are improved; at the same time, the process flow is clear, the degree of automation is high, the dependence on manual experience can be reduced, the single piece processing rhythm can be shortened, and the production cost can be reduced.

[0084] Further, in another embodiment, the divided electric chafing dish comprises a pot body, a baffle, a handle and a heating base, the pot body comprises an integrally formed pot sidewall and a pot bottom, the top of the pot sidewall is provided with a convex edge, and the two ends of the baffle are welded to the inner side of the pot sidewall, and the bottom of the baffle is welded to the inner side of the pot bottom.

[0085] Working principle:

[0086] The operator places the to-be-processed electric wok in the fixed seat 402, and the bottom of the fixed seat 402 is provided with grooves and a plurality of positioning grooves matched with the protrusions on the bottom of the wok body. Since the height of the fixed seat 402 is less than the overall height of the wok body, the protrusions on the top of the side wall of the wok body are located above the fixed seat 402 after being placed, so that the second clamp 404 can exert a lateral lamination effect on the side wall of the wok body in the space above the protrusions, thereby providing a structural basis for subsequent position control of the lamination of the partition plate.

[0087] When the wok body is positioned, the control module 5 sends control signals to the first driving member 4033, the second driving member 4034 and the third driving member 4043 in the fixing device 4 in sequence according to the predetermined process. The first clamp 403 starts to work, and the control module 5 first drives the first driving member 4033 to act, so that the first driving member drives the clamping piece 4032 to move transversely to the fixed table 4031 through the connecting rod, until the clamping piece 4032 and the fixed table 4031 firmly clamp the partition plate. During the clamping process, the elastic silica gel pad 40311 on the top of the fixed table 4031 and the clamping groove on the clamping piece 4032 form a flexible clamping structure, which can absorb the thickness error of the partition plate, stabilize the clamping force and avoid damage to the partition plate. After transverse clamping is completed, the control module 5 continues to drive the second driving member 4034 to act, and the second driving member drives the moving plate 407 to slide downward along the guide column 405 through the push rod, so as to drive the fixed table 4031 and the clamping piece 4032 to move downward as a whole. The clamped partition plate moves along the inside of the wok body under the action of the pressing force, until the bottom of the partition plate reaches the preset welding position and is laminated with the inside bottom of the wok body. The guide column 405 provides vertical direction guidance during this process, so as to ensure that the downward movement trajectory is accurate and stable, and no deviation occurs.

[0088] After the bottom of the partition plate is pressed to the preset position, in order to make the welding seam area at both ends of the partition plate reach the best lamination state, the second clamp 404 starts to act, and the control module 5 drives the third driving member 4043 to advance to the side wall of the wok body. The third driving member drives the limiting block 4041 and the pressing block 4042 thereon to move inward as a whole. The pressing block 4042 has a pressing surface matched with the shape of the outside of the wok body, and the pressing block 4042 abuts against the outside of the side wall of the wok body during the advancing process, so that the inside of the side wall of the wok body and the end of the partition plate form reliable lamination. At the same time, the upper and lower ends of the limiting block 4041 close to the pressing block abut against the top protrusion of the wok body and the side wall of the fixed seat 402 respectively, thereby providing limiting support for the wok body from three directions to realize multi-point stabilization of the posture of the wok body. This process pushes the end of the partition plate to the ideal lamination state before welding, thereby greatly improving the welding forming quality and post-welding strength.

[0089] After the three-dimensional posture of the partition plate is completely locked, the control module 5 sends linkage control instructions to the X moving shaft 201, the Y moving shaft 202 and the Z moving shaft 203 of the displacement assembly 2 according to the set welding process program, and the displacement assembly 2 starts to drive the welding head 3 to position in space. On the basis of the X, Y and Z three-axis movement, the control module 5 synchronously controls the angle change of the rotating a shaft 204 and the rotating b shaft 205, automatically adjusts the incident angle of the welding head 3 according to the space posture of the welding position, ensures that the welding light beam always enters along the tangent direction of the weld, improves the welding uniformity, and the welding head 3 moves along the weld seam path at the two ends and the bottom of the pot body according to the preset welding path of the control module, so that the continuous laser welding operation is realized.

[0090] After all the welds are processed, the control module sequentially performs resetting: the third driving part 4043 reversely acts to release the second clamp 404 from the pot body sidewall fitting force; then the second driving part 4034 moves upward to release the partition plate downward pressing; then the first driving part 4033 releases the clamping piece 4032 from the clamping of the partition plate; and finally the welding head 3 and the displacement assembly 2 automatically return to the initial position. The operator can take out the processed separate electric fire pot from the fixing seat 402.

[0091] Unless otherwise clearly specified and limited, in the present application, if there are terms such as "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, the orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation. Therefore, the terms describing the orientation or positional relationship in the present application are used only for exemplary description, and cannot be understood as a limitation on the present patent. For those skilled in the art, the specific meaning of the above terms can be understood in combination with the drawings and according to the specific circumstances.

[0092] Unless otherwise clearly specified and limited, in the present application, if there are terms such as "setting", "connecting" and "connecting", they should be understood in a broad sense, for example, they can be fixedly connected, or they can be detachably connected, or integrally connected; they can be directly connected, or indirectly connected through an intermediate medium; they can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0093] The above is only a preferred embodiment of the present application, and does not limit the present application in any form. Any simple modification or equivalent change made to the above embodiment according to the technical essence of the present application falls within the protection scope of the present application.

Claims

1. A laser welding apparatus for processing a partition type electric fire pot, characterized by, The utility model relates to a kind of laser welding machine for the electric fire pot, including: Rack (1), displacement assembly (2), welding head (3), fixing device (4) and control module (5), the displacement assembly (2) and fixing device (4) are connected on rack (1), the displacement assembly (2), welding head (3) and fixing device (4) are controlled by the control panel (5); The fixing device (4) includes base (401), fixed seat (402), first clamp (403) and second clamp (404), the fixed seat (402) is located on the base (401), the fixed seat (402) is used to fix the electric fire pot of separation type, the first clamp (403) is located above the fixed seat (402), the first clamp (403) is used to hold and press down tightly the baffle of electric fire pot of separation type, so that baffle is pressed into the inside of pot to preset position, the second clamp (404) is located on both sides of the fixed seat (402), and the second clamp (404) is used to push the side wall of pot of electric fire pot of separation type and the end of baffle fit; The welding head (3) is rotatably connected on the displacement assembly (2), when processing, the welding head (3) moves above the fixed seat (402), for realizing the laser welding of baffle and the side wall of pot of electric fire pot of separation type fixed on the fixed seat (402) and the laser welding of baffle bottom and the inside bottom of pot.

2. The laser welding apparatus for processing a partition type electric fire pot according to claim 1, characterized in that: The first clamp (403) includes fixed table (4031), clamping piece (4032), first driving part (4033) and second driving part (4034), the clamping piece (4032) is retractably connected on one side of the fixed table (4031), the control panel (5) controls first driving part (4033) and second driving part (4034), first driving part (4033) drives the clamping piece (4032) to be close to the fixed table (4031) to hold the baffle of electric fire pot of separation type first, then the fixed table (4031) and clamping piece (4032) are controlled to move downward by the second driving part (4034) together.

3. The laser welding apparatus for processing a partition type electric fire pot according to claim 2, characterized in that: The fixed table (4031) top is equipped with elastic silica gel pad (40311), the elastic silica gel pad (40311) extends in the direction of the clamping piece (4032), the clamping piece (4032) is correspondingly equipped with clamping groove, when the clamping piece (4032) is close to the fixed table (4031), the elastic silica gel pad (40311) is clamped in the clamping groove.

4. The laser welding apparatus for processing a partition type electric fire pot according to claim 2, characterized in that: The fixed seat (402) is provided with guide columns (405) on both sides, and a fixed plate (406) and a moving plate (407) are arranged between the two guide columns (405), the fixed plate (406) is fixedly connected to the top end of the guide column (405), and the moving plate (407) can move up and down on the guide column (405); the fixed table (4031) is fixedly connected below the moving plate (407), the first driving member (4033) is fixed to the top of the fixed table (4031), and the first driving member (4033) is connected to the clamping piece (4032) through a connecting rod; the second driving member (4034) is arranged above the fixed plate (406), and the second driving member (4034) is connected to the moving plate (407) through a push rod.

5. The laser welding apparatus for processing a partition type electric fire pot according to claim 2, characterized in that: The height of the fixed seat (402) is less than the height of the divided electric chafing dish, and the fixed seat (402) is provided with second clamps (404) on both sides, and the two second clamps (404) are symmetrically arranged, the second clamp (404) comprises a limiting block (4041), a pressing block (4042) and a third driving member (4043), the limiting block (4041) is connected to the third driving member (4043), the pressing block (4042) is fixedly connected to one side of the limiting block (4041) away from the third driving member (4043), the control panel (5) controls the third driving member (4043), the third driving member (4043) moves the limiting block (4041) and the pressing block (4042) towards the side wall of the pot body, the pressing block (4042) abuts against the outer side of the side wall of the pot body, and the pressing block (4042) corresponds to the end of the partition plate, and the two ends of the side close to the pressing block (4042) abut against the convex edges on the top of the side wall of the pot body and the fixed seat (402) respectively, so as to push the side wall of the pot body of the divided electric chafing dish to be attached to the two ends of the partition plate.

6. The laser welding apparatus for processing a partition type electric fire pot according to claim 2, characterized in that: A hand wheel is arranged between the fixed seat (402) and the base (401).

7. The laser welding apparatus for processing a partition type electric fire pot according to claim 1, characterized in that: The displacement assembly (2) comprises an X moving shaft (201), a Y moving shaft (202), a Z moving shaft (203), a rotating a shaft (204) and a rotating b shaft (205), the Y moving shaft (202) is slidably connected to the X moving shaft (201), the Z moving shaft (203) is slidably connected to the Y moving shaft (202), the rotating a shaft (204) is rotatably connected to the Z moving shaft (203), the rotating b shaft (205) is rotatably connected to the rotating a shaft (204), and the welding head (3) is fixedly connected to the rotating b shaft (205).

8. The laser welding apparatus for processing a partition type electric fire pot according to claim 7, characterized in that: The rotating a shaft (204) comprises a rotating a shaft support (2041) fixedly connected to the Z moving shaft (203) and a rotating a shaft body (2042) rotationally connected to the rotating a shaft support (2041), wherein the rotating a shaft body (2042) is driven by a servo rotating motor or a step rotating motor, and the rotating a shaft (204) is provided with an angle sensor; The rotating b shaft (205) comprises a rotating b shaft support (2051) fixed to the end of the rotating a shaft and a rotating b shaft body (2052) connected to the rotating b shaft support (2051) through bearings, wherein the outer end of the rotating b shaft body (2052) is fixedly connected to the welding head (3), and the rotating b shaft (205) enables the welding head (3) to rotate around the rotating b shaft body (2052).

9. The process for laser welding of a dividing type electric chafing dish processing equipment according to any one of claims 1 to 8, characterized in that: The process is used for processing a partition type electric chafing dish, and comprises the following steps: S1, workpiece positioning and fixing The partition type electric chafing dish is placed in the fixing seat (402) of the fixing device (4), the bottom of the pot body is embedded in the groove of the fixing seat (402), the positioning grooves provided in the groove are matched with the positioning protrusions on the bottom of the pot body, the positioning of the pot body is completed, the structure that the height of the fixing seat (402) is less than the height of the pot body is used, and the convex edges on the top of the side wall of the pot body are located above the fixing seat (402); S2, pressing the partition plate The first driving member (4033) of the first clamp (403) is started, the clamping piece (4032) is moved transversely to the fixed table (4031) and clamps the partition plate, then the second driving member (4034) drives the moving plate (407) and the fixed table (4031) to move downward, so that the partition plate is pressed into the inside of the pot body to a preset position; S3, side wall bonding After the partition plate is pressed into the preset welding position, the third driving member (4043) of the second clamp (404) is started, the limiting block (4041) and the pressing block (4042) are moved towards the side wall of the pot body, the pressing block (4042) abuts against the outside of the side wall of the pot body, and the limiting block (4041) abuts against the convex edges on the top of the side wall of the pot body and the fixing seat (402) respectively, so as to push the side wall of the pot body to completely bond with both ends of the partition plate; S4, welding head positioning The welding head (3) is moved to the welding position of the partition plate and the side wall of the pot body through the X moving shaft (201), the Y moving shaft (202) and the Z moving shaft (203) of the displacement assembly (2), and the incident angle of the welding head (3) is adjusted through the rotating a shaft (204) and the rotating b shaft (205); S5, side wall welding The welding head (3) is started to emit a collimated and focused laser beam to the combined part of the partition plate and the side wall of the pot body, a continuous weld is formed between both ends of the partition plate and the side wall of the pot body, and reliable welding of the inside of both ends of the partition plate and the side wall of the pot body is realized; S6, bottom welding After the sidewall welding is completed, the displacement assembly (2) drives the welding head (3) to descend along the Z moving shaft (203) and adjust the rotation a shaft (204) and the rotation b shaft (205) to a new incident angle, so that the welding head (3) performs laser welding on the bottom of the baffle and the inner side of the bottom of the pot, and the welding and fixing between the bottom of the baffle and the bottom of the pot are completed; S7, cooling and unloading The welding head (3) is closed, the nozzle assembly continues to release the protective gas to cool the weld, and after the temperature of the weld decreases to a safe range, the first clamp (403) and the second clamp (404) are released in sequence, the restriction and the pressing force are removed, and the completed separate electric chafing dish is taken out.

10. The process for laser welding of a dividing type electric chafing dish processing apparatus according to claim 9, characterized in that: The separate electric chafing dish comprises a pot body, a baffle, a handle and a heating base, the pot body comprises an integrally formed pot body sidewall and a pot body bottom, the top of the pot body sidewall is provided with a convex edge, the baffle is welded to the inner side of the pot body sidewall at both ends, and the bottom of the baffle is welded to the inner side of the pot body bottom.

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