Multi-station rotary laser welding system for automobile horn assembly production

Abstract

The invention relates to the technical field of welding, and discloses a multi-station rotary laser welding system for automobile horn assembly production, which comprises a rotary press, the rotary press is positioned below a welding part, a positioning part is arranged on the upper surface of the rotary press along the circumferential direction, the positioning part comprises a positioning frame arranged on the upper surface of the rotary press, and a movable groove is formed in the bottom end in the positioning frame. A supporting piece is arranged at the bottom end in the movable groove. The positioning frame is provided with the positioning part, the positioning frame is of an integral frame structure, the side grooves symmetrically formed in the inner wall of the positioning frame provide stable sliding rails for the rubber layer, and the circular grooves in the middles of the inner walls of the side grooves achieve accurate butt joint of the linkage piece and the rubber layer; the side, close to the circular groove, of the rubber layer is fixedly connected with a fixing plate, the fixing plate is in sliding fit with a rectangular groove in the inner wall of the side groove, it is ensured that the rubber layer cannot deviate in the stretching and retracting process, and a positioning spring connected to the other side of the fixing plate provides reset power for the rubber layer.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of welding, in particular to a multi-station rotary laser welding system for automobile horn assembly production. BACKGROUND

[0002] In the prior art, the welding link of automobile horn assembly production has traditionally relied on riveting and resistance welding processes. Riveting connects components through mechanical deformation, but there is a risk of loosening and additional weight, which may affect the long-term stability of the horn sound quality. Resistance welding uses high current to generate heat, but its heat-affected zone is large, which easily leads to deformation of precision components, and electrode wear affects the consistency of welding quality. These methods face bottlenecks in efficiency, accuracy and reliability. To break through these limitations, multi-station rotary laser welding equipment has emerged, which usually has a central servo turntable as the core, with multiple functional stations such as feeding, welding, detection and discharging arranged around it. Each station is equipped with a clamp to achieve precise positioning of the workpiece from multiple angles. The laser welding head is fixed to the welding station, which, under the coordination of the control system, performs high-speed and low-heat input precision welding on the horn assembly that flows to the position with the turntable.

[0003] In the process of automatic welding of automobile horns, in order to facilitate rapid feeding and discharging, the cavity size of the positioning clamp is usually slightly larger than the horn assembly body, leaving a necessary assembly gap. However, this design intention directly contradicts the extreme requirement for precision of the welding process. The serious consequences mainly manifest in two aspects: First, it severely restricts the "repositioning accuracy". Each horn assembly may have a random offset of microns in the clamp, causing the focal point of the laser welding to be unable to accurately align with the predetermined weld, directly causing unstable quality and poor consistency of batch products. Second, it greatly threatens the "stability of the welding process". Under the action of high-energy impact and thermal stress of the laser, the assembly that is not completely constrained is prone to micro-vibration or displacement. This small movement during welding will directly lead to discontinuous welds, uneven penetration, and even fatal defects such as undercutting and virtual welding, ultimately significantly reducing the reliability of the welded structure and the yield of the horn product. SUMMARY

[0004] In view of the above shortcomings of the prior art, the present application provides a multi-station rotary laser welding system for automobile horn assembly production, which can effectively solve the problem of welding precision misalignment and process stability decline caused by the positioning gap between the welding zone clamp and the horn assembly in the prior art.

[0005] To achieve the above purpose, the present application is realized by the following technical scheme:

[0006] The present application provides a multi-station rotary laser welding system for automobile horn assembly production, comprising:

[0007] welding portion;

[0008] material taking member;

[0009] rotary machine, the upper surface of the rotary machine is provided with positioning portions in the circumferential direction, the positioning portion located below the welding portion is in the welding area, and the positioning portion located below the material taking member is in the feeding and discharging area;

[0010] The positioning portion comprises a positioning rack provided on the upper surface of the rotary machine, a movable groove is formed in the inner bottom end of the positioning rack, a supporting member is arranged in the inner bottom end of the movable groove, a ring groove is formed in the inner wall of the movable groove, an extrusion block is slidably connected to the inner wall of the ring groove, and rubber layers are symmetrically formed in the inner wall of the positioning rack.

[0011] The rubber layers and the extrusion block are connected through a linkage.

[0012] Further, side edge grooves slidably connected to the rubber layers are symmetrically formed in the inner wall of the positioning rack, and a circular groove is formed in the middle of the inner wall of the side edge groove.

[0013] Further, a fixed plate is fixedly connected to one side of the rubber layer close to the circular groove, a rectangular groove is formed in the inner wall of the side edge groove, and the fixed plate is slidably connected to the rectangular groove, and a positioning spring is fixedly connected to the other side of the fixed plate.

[0014] Further, the linkage comprises a resisting rod embedded in the inner wall of the positioning spring, one end of the resisting rod away from the fixed plate is fixedly connected with a connecting plate, the bottom end of the connecting plate is rotatably connected with a movable shaft, the movable shaft is fixedly connected with the inner wall of the side edge groove, and the resisting rod penetrates through the circular groove.

[0015] Further, a limiting plate is arranged at one end of the extrusion block away from the center of the movable groove, and the limiting plate is rotatably connected with the bottom end of the connecting plate.

[0016] Further, the supporting member comprises a telescopic member arranged at the bottom of the movable groove, a supporting rod is arranged at the top end of the outer wall of the telescopic member in the circumferential direction, a side plate is arranged at the top end of the supporting rod, and a connecting rod is arranged at the side edge of the side plate.

[0017] Further, the supporting member further comprises a supporting plate, a clamping groove is formed in the side edge of the supporting plate, a telescopic spring is sleeved on the outer wall of the connecting rod, and the telescopic spring is embedded in the clamping groove.

[0018] Compared with the prior art, the technical scheme provided by the application has the following beneficial effects:

[0019] The positioning part is provided with the positioning frame which is a whole frame structure, the symmetrical side grooves in the inner wall provide a stable sliding track for the rubber layer, and the round groove in the middle of the inner wall of the side groove realizes the accurate butt joint of the linkage and the rubber layer; the fixed plate is fixedly connected to the side of the rubber layer close to the round groove, the fixed plate and the rectangular groove in the inner wall of the side groove are in sliding fit, so that the rubber layer will not be deviated during the stretching and contracting process, and the positioning spring connected to the other side of the fixed plate provides the reset power for the rubber layer. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative effort.

[0021] Figure 1 It is a schematic diagram of the overall structure of the embodiment of the present application;

[0022] Figure 2 It is a schematic diagram of the positioning part structure of the embodiment of the present application;

[0023] Figure 3 It is a schematic diagram of the internal structure of the movable groove of the embodiment of the present application;

[0024] Figure 4 It is a schematic diagram of the internal structure of the positioning frame of the embodiment of the present application;

[0025] Figure 5 It is a schematic diagram of the connection structure of the rubber layer and the extrusion block of the embodiment of the present application;

[0026] Figure 6 It is a schematic diagram of the support structure of the embodiment of the present application;

[0027] Figure 7 It is a schematic diagram of the structure section of the positioning part of the embodiment of the present application.

[0028] The numbers in the drawings represent: 1, welding part; 2, rotary machine; 3, positioning part; 31, positioning frame; 311, side groove; 312, round groove; 32, movable groove; 33, support; 331, support plate; 332, support rod; 333, stretching part; 334, side plate; 335, connecting rod; 34, rubber layer; 341, fixed plate; 342, positioning spring; 35, extrusion block; 351, limiting plate; 36, ring groove; 37, linkage; 371, abutting rod; 372, connecting plate; 373, movable shaft; 4, material taking part. DETAILED DESCRIPTION

[0029] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments but not all of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0030] The present application will be further described below with reference to the embodiments.

[0031] Embodiment:

[0032] Please refer to Figures 1-7 , the present application provides a multi-station rotary laser welding system technical solution for automobile horn assembly production:

[0033] Reference Figure 1 , the laser welding system adopts a multi-station rotary integrated layout, and the core components include a welding part 1, a rotary machine 2, a positioning part 3 and a material taking part 4, and each part forms a function closed loop with precise cooperation. The rotary machine 2 as the core transmission mechanism is horizontally arranged below the welding part 1, and a plurality of positioning parts 3 are uniformly distributed on the surface in the circumferential direction. Through the circulation rotation of the rotary machine 2, the positioning parts 3 are switched between the welding area and the feeding area. The positioning part 3 directly below the welding part 1 constitutes the welding operation area, and the positioning part 3 below the material taking part 4 constitutes the feeding operation area. This layout breaks the space limitation of the traditional single station, realizes parallel operation of welding and feeding processes on the same equipment, and does not need to additionally set up an independent feeding platform, greatly optimizing the space occupation form of the equipment.

[0034] Reference Figure 2 , Figure 3 , Figure 4 and Figure 5 , the positioning part 3 as the key mechanism for workpiece clamping and positioning adopts a pure mechanical linkage design, and automatic clamping and positioning can be realized without additional power source, and the core innovation is concentrated in the linkage clamping mechanism and the self-adaptive supporting mechanism.

[0035] The positioning frame 31 of the positioning part 3 is an integral frame structure, the side groove 311 symmetrically opened in the inner wall thereof provides a stable sliding track for the rubber layer 34, and the circular groove 312 in the middle of the inner wall of the side groove 311 realizes the precise butt joint of the linkage 37 and the rubber layer 34. The rubber layer 34 is fixedly connected with a fixed plate 341 on the side close to the circular groove 312, the fixed plate 341 is in sliding fit with the rectangular groove in the inner wall of the side groove 311, so that the rubber layer 34 will not be deviated during the extension process, and the positioning spring 342 connected with the other side of the fixed plate 341 provides a reset power for the rubber layer 34.

[0036] The design of linkage 37 is the core of automatic clamping, the abutment rod 371 embedded in the inner wall of the positioning spring 342 penetrates the circular groove 312, one end is in close contact with the fixed plate 341, and the other end is fixedly connected with the connecting plate 372. The bottom end of the connecting plate 372 is fixed with the inner wall of the side groove 311 through the movable shaft 373, forming a lever structure that can flexibly rotate, and the other end of the connecting plate 372 is rotatably connected with the limiting plate 351 of the extrusion block 35. The extrusion block 35 is slidingly connected in the annular groove 36 in the inner wall of the movable groove 32, and can slide horizontally along the annular groove 36. The limiting plate 351 limits the sliding stroke of the extrusion block 35, ensuring the stability of the linkage action. This mechanical linkage structure does not require external power such as motors and air cylinders, and can trigger the clamping action only by relying on the weight of the workpiece itself, forming a closed-loop transmission of "workpiece pressing-extrusion block 35 sliding-connecting plate rotating 372-abutment rod 371 advancing-rubber layer 34 clamping".

[0037] Reference Figure 6 And Figure 7 The support 33 is located at the bottom of the movable groove 32, and adopts a multi-layer buffering and self-adaptive telescopic structure, including a support plate 331, a support rod 332, a telescopic part 333, a side plate 334 and a connecting rod 335. The telescopic part 333 is the core support unit of the support 33, the support rods 332 distributed on the outer wall top of the telescopic part 333 are connected through the side plate 334 and the connecting rod 335, and the telescopic spring sleeved on the connecting rod 335 is embedded in the clamping groove on the side of the support plate 331. This design enables the support plate 331 to have bidirectional buffering capability: when the workpiece is placed, the support plate 331 absorbs the impact force through the telescopic spring, and at the same time, the connecting rod 335 drives the side plate 334 and the support rod 332 to expand along the telescopic part 333, thereby expanding the support area; after the workpiece is removed, the telescopic spring drives the support plate 331 to reset, and the support rod 332 shrinks back to the initial state. The overall structure of the support 33 not only ensures the stability of the support, but also realizes the adaptation to workpieces of different thicknesses through elastic design.

[0038] The multi-station parallel operation mode breaks the single process of "welding-waiting-material loading and unloading" of traditional welding equipment, and the positioning part 3 is circularly rotated by the rotating machine 2. When one positioning part 3 completes welding in the welding area, another positioning part 3 has completed workpiece loading in the material loading and unloading area, so that the welding and material loading and unloading processes are performed synchronously, thereby greatly shortening the production cycle and improving the production capacity per unit time.

[0039] The circumferential layout of the rotating machine 2 enables the multiple positioning parts 3 to be arranged compactly, thereby saving a large amount of workshop space compared with the traditional parallel layout of multiple devices, and especially suitable for the space requirements of small and medium-sized production enterprises. At the same time, the spatial layout of the production process is simplified, and the material transfer cost is reduced.

[0040] The feeding and discharging area is separated from the welding area and is fixed in position, so the operator does not need to move frequently, only needs to put and take out the workpiece in the fixed area, reduces the operation strength, at the same time, reduces the safety hidden danger caused by the movement of personnel, improves the safety of the production process.

[0041] The mechanical linkage structure realizes the synchronization and consistency of the clamping action. When the extrusion block 35 slides along the ring groove 36, the precise transmission of the connecting plate 372 and the stopper 371 makes the two sides of the rubber layer 34 synchronize to the workpiece, ensuring that the center of the workpiece is accurately aligned with the laser focal point of the welding part 1, effectively avoiding the welding defects caused by positioning deviation, and solving the problem that the red light indication does not match the actual welding position in traditional laser welding.

[0042] The elastic expansion of the positioning spring 342 and the flexible clamping of the rubber layer 34 make the positioning part 3 automatically adapt to automobile horn components of different sizes; whether the workpiece has differences in diameter or thickness, the compression amount of the positioning spring 342 and the clamping force of the rubber layer 34 can be adjusted, without the need to replace special clamps, reducing the cost and time of equipment debugging.

[0043] The flexible material of the rubber layer 34 avoids scratching and damage to the surface of the workpiece caused by rigid clamping, especially suitable for precise components of automobile horns; at the same time, the buffering effect of the positioning spring 342 gradually increases the clamping force, avoiding the deformation of the workpiece caused by instantaneous clamping, and protecting the size accuracy and appearance quality of the workpiece.

[0044] The pure mechanical linkage structure does not need to rely on electric control elements or pneumatic systems, reducing the influence of external factors such as circuit failure and air pressure fluctuation, and the equipment has higher stability; the wear degree of mechanical parts is low, the maintenance cost is low, and the service life is long, compared with electric control clamping mechanism, it is more suitable for long-time continuous production.

[0045] The support rod 332 forms a ring-shaped support structure after expanding along the circumference of the telescopic part 333, providing uniform support from the bottom of the workpiece, avoiding the tilting or shaking of the workpiece caused by single-point support, ensuring the stability of the workpiece position during welding, and further improving the welding precision.

[0046] The combination design of the telescopic spring and the support plate 331 effectively absorbs the impact force when the workpiece is placed, avoids damage to the workpiece caused by hard contact, and reduces the vibration transmission between the workpiece and the support part 33, providing a stable support environment for the welding process, and reducing the welding deviation caused by vibration.

[0047] The elastic structure and telescopic design of the support part 33 make it able to adapt to automobile horn components of different thicknesses, without the need for manual adjustment of the support height, and regardless of the thickness of the workpiece, stable support can be achieved through the compression of the telescopic spring and the expansion of the support rod 332, enhancing the versatility of the equipment.

[0048] The uniform support force and flexible buffering design reduces stress concentration during workpiece clamping, and in combination with the uniform clamping of the rubber layer 34, the workpiece is subjected to more uniform restraint during welding, effectively relieving residual stress caused by uneven welding temperature, reducing welding deformation, and solving the deformation problem caused by rigid restraint and temperature gradient in traditional welding.

[0049] As a precision electronic component, the automobile horn faces multiple technical challenges in the welding process: first, the positioning accuracy is insufficient, the traditional clamping mechanism needs to be adjusted manually, which is prone to workpiece deviation, leading to laser welding position deviation and affecting welding quality; second, the workpiece damage rate is high, rigid clamping is prone to scratch the workpiece surface, and excessive instantaneous clamping force is prone to cause workpiece deformation; third, the production efficiency is low, the single station design makes welding and feeding unable to be synchronized, resulting in long waiting time; fourth, the adaptability is poor, different sizes of workpieces need to replace special fixtures, the debugging is complicated and the cost is high; fifth, the welding deformation is serious, uneven temperature and clamping stress cause workpiece residual deformation, affecting assembly precision; sixth, the operation and maintenance are complex, the electric or pneumatic clamping mechanism relies on professional technicians, the maintenance cost is high, and the failure rate is high.

[0050] The linkage clamping mechanism realizes automatic synchronous positioning through mechanical linkage, the workpiece is placed into the extrusion block 35 and driven to slide by its own gravity, and through the precise transmission of the connecting plate 372 and the stop rod 371, the two rubber layers 34 simultaneously clamp the workpiece, ensuring that the center of the workpiece is accurately aligned with the laser focal point of the welding part 1. This design avoids manual adjustment errors, and the stability of the mechanical structure ensures the repeatability of positioning, effectively solving the problem of deviation between red light indication and actual welding position in traditional laser welding, greatly improving the welding precision.

[0051] The flexible material of the rubber layer 34 and the buffering effect of the positioning spring 342 are combined to realize flexible clamping; the rubber layer 34 is in flexible contact with the workpiece surface to avoid scratching; the positioning spring 342 gradually increases the clamping force to avoid workpiece deformation caused by instantaneous clamping. At the same time, the extension spring of the support piece 33 and the buffering design of the support plate 331 absorb the impact force when the workpiece is placed, further protecting the workpiece and reducing the damage rate.

[0052] The multi-station rotary design realizes parallel operation of welding and feeding, the positioning part 3 is driven by the rotary machine 2 to circulate, and the next workpiece can be loaded without waiting for the welding to be completed, greatly shortening the production cycle. Compared with traditional single-station equipment, the production efficiency is significantly improved, especially suitable for batch production scenes.

[0053] The linkage clamping mechanism of the positioning part 3 and the support piece 33 have self-adaptive capability; the elastic expansion of the positioning spring 342 and the flexible clamping of the rubber layer 34 can adapt to workpieces of different diameters, and the telescopic structure and spring design of the support piece 33 can adapt to workpieces of different thicknesses, without the need to replace special clamps, and only the workpiece needs to be directly placed in the positioning part 3 to achieve stable clamping, simplifying the debugging process and reducing production costs.

[0054] On the one hand, the uniform clamping of the rubber layer 34 and the elastic force of the positioning spring 342 make the restraining force on the workpiece more uniform, reducing stress concentration; on the other hand, the annular support structure of the support piece 33 ensures that the workpiece is uniformly stressed, avoiding excessive local stress; at the same time, flexible clamping and buffer design reduce the rigid contact between the workpiece and the clamp, relieving residual stress caused by uneven welding temperature, effectively controlling welding deformation, and improving workpiece assembly accuracy.

[0055] Pure mechanical structure design does not require electric control or pneumatic system, simplifying the operation process, and ordinary operators can quickly get started; mechanical parts have low wear and low failure rate, and do not require professional maintenance, only regular cleaning and lubrication is required, greatly reducing maintenance costs, solving the problem of dependence on professionals and high maintenance costs of traditional equipment.

[0056] Check whether the running of the wheel turning machine 2 is smooth and whether the components of the positioning part 3 are in the initial state; whether the rubber layer 34 is reset and the positioning spring 342 is in a natural expansion state, whether the support plate 331 of the support piece 33 is horizontal, whether the extrusion block 35 is located at the initial position of the ring groove 36, whether the laser light path of the welding part 1 is normal, and whether the action of the material taking part 4 is flexible.

[0057] Clean the surface of the automobile horn part to be welded of dust, oil stains and other impurities to ensure the cleanliness of the welding surface and avoid affecting the welding quality; without adjusting the equipment, the device can automatically adapt according to the size and specifications of the workpiece.

[0058] The operator places the automobile horn part to be welded in the movable groove 32 of the positioning part 3 in the feeding and discharging area, and the bottom of the workpiece contacts the support plate 331 of the support piece 33.

[0059] The gravity of the workpiece acts on the support plate 331, which slowly moves downward, driving the connecting rod 335 in the side clamping groove to compress the telescopic spring, and the elastic force of the telescopic spring forms a buffer to avoid impact on the workpiece; at the same time, the downward movement of the support plate 331 is transmitted to the side plate 334 through the connecting rod 335, the side plate 334 drives the support rod 332 to expand outward along the outer wall of the telescopic piece 333, forming an annular support structure to provide uniform support from all around the bottom of the workpiece, ensuring that the workpiece is in a horizontal state.

[0060] The workpiece continues to move downward, the bottom contacts the upper surface of the extrusion block 35, and the extrusion block 35 slides along the ring groove 36 away from the center of the movable groove 32 under the gravity of the workpiece. The limit plate 351 at one end of the extrusion block 35 moves, driving the connecting plate 372 to rotate around the movable shaft 373.

[0061] During the rotation of the connecting plate 372, the end away from the limit plate 351 moves towards the direction of the stop rod 371, pushing the stop rod 371 to move along the circular groove 312 towards the rubber layer 34; the stop rod 371 extrudes the fixed plate 341, which slides along the rectangular groove in the side groove 311, while compressing the positioning spring 342; the fixed plate 341 drives the rubber layer 34 to move closer to the side of the workpiece, until the rubber layer 34 tightly fits the outer wall of the workpiece, forming a uniform clamping force, and the workpiece is completed positioning and clamping. At this time, the positioning spring 342 is in a compressed state, providing power for subsequent resetting.

[0062] After the workpiece is clamped, the rotary machine 2 starts, driving the positioning part 3 loaded with the workpiece to rotate from the loading and unloading area to the welding area, while the other empty positioning part 3 rotates to the loading and unloading area, preparing for the loading of the next workpiece. When the positioning part 3 reaches the welding area and stops rotating, the welding part 1 starts, and the laser beam is precisely focused on the welding area of the workpiece to perform laser welding. During the welding process, the rubber layer 34 of the positioning part 3 and the support part 33 work together to ensure the stability of the workpiece position and avoid vibration or deviation; at the same time, the uniform clamping force and support force reduce the welding deformation. While the welding part 1 is welding, the operator can complete the loading and clamping of the next workpiece in the positioning part 3 in the loading and unloading area, realizing the parallel operation of welding and loading and unloading, without waiting for the welding to be completed. After the welding operation is completed, the rotary machine 2 starts again, driving the positioning part 3 with the workpiece after welding to rotate from the welding area to the loading and unloading area, while the positioning part 3 loaded with the new workpiece rotates to the welding area to start welding. The taking-out part 4 starts to take out the workpiece after welding from the positioning part 3 in the loading and unloading area and puts it into the finished product collecting device.

[0063] After the welding operation is completed, the rotary machine 2 drives the positioning part 3 carrying the horn assembly after welding to rotate smoothly from the welding area to the loading and unloading area. At this time, the rubber layer 34 of the positioning part 3 has been retracted away from the assembly under the resetting force of the positioning spring 342, releasing the lateral clamping of the assembly; a small gap is formed between the rubber layer 34 and the outer wall of the assembly, reserving space for the assembly to move up; the extrusion block 35 has also been reset along the ring groove 36 to the initial position close to the center of the movable groove 32, no longer constraining the bottom of the assembly.

[0064] With the release of the clamping of the rubber layer 34, the telescopic part 333 of the support part 33 starts, driving the support plate 331 to move smoothly upward from the bottom of the movable groove 32, and the horn assembly after welding rises synchronously with the support plate 331.

[0065] In this process, the mechanical linkage logic of the support 33 is reversed; before the workpiece is pressed down, the gravity of the assembly makes the support plate 331 move down, driving the connecting rod 335 to compress the telescopic spring arranged outside the connecting rod 335, and the connecting rod 335 pulls the support rod 332 along the side plate 334 to contract inward along the outer wall of the telescopic part 333;

[0066] At this time, in the rising stage, the telescopic spring releases the reset force, pushes the connecting rod 335 to slide upward along the clamping groove on the side of the support plate 331, and the connecting rod 335 drives the side plate 334 to move upward synchronously. The pulling force of the side plate 334 on the support rod 332 disappears, and instead, under the constraint of the guide groove on the outer wall of the telescopic part 333, the support rod 332 slides slowly along the outer wall of the telescopic part 333 away from the connecting rod 335. The end of the support rod 332 extends from the center area to the edge area of the bottom of the assembly, and the support area gradually expands as the support plate 331 rises.

[0067] During the process of the support rod 332 moving away from the connecting rod 335, its uniform distribution along the circumference of the telescopic part 333 changes the support range from "point-like concentrated support" at the bottom of the assembly to "annular dispersed support". In the initial rising stage, the support rod 332 only supports the center of the bottom of the assembly, and the support area is similar to the upper surface of the support plate 331. As the rising height increases, the distance of the support rod 332 sliding outward gradually increases, and the support radius expands from the diameter of the assembly to finally form an annular support structure. This structure can effectively disperse the weight of the assembly, avoid the slight deformation caused by the temperature difference of the assembly after welding from causing tilting, and prevent the assembly from shaking or falling off due to inertia during the rising process. It is especially suitable for the horn assembly with some residual heat after welding to avoid secondary deformation of the assembly due to uneven stress at high temperature. When the support plate 331 rises to a position 5-10 mm above the top end of the movable groove 32, the horn assembly is completely separated from the inner cavity of the positioning frame 31. At this time, the bottom of the assembly is stably lifted by the support rod 332 with an expanded area, and the whole body is in an open space above the clamp, providing sufficient space for the operation of the taking device 4.

[0068] The taking device 4 does not need to extend into the inside of the positioning frame 31, but only needs to vertically or horizontally grab the assembly above the clamp, avoiding interference with the inner wall of the positioning frame 31, the rubber layer 34 or the ring groove 36, etc. during the taking process, reducing the risk of taking failure;

[0069] The expanded support area also provides more flexible grabbing points for the taking device 4, for example, the taking device 4 can apply force from the side or above the assembly, without worrying about the assembly sliding off the support plate 331 when grabbing, improving the efficiency and safety of taking.

[0070] After the welding assembly is taken out by the taking device 4, the support plate 331 slowly descends and resets under the driving of the telescopic part 333. At this time, the support rod 332 is retracted to the direction close to the connecting rod 335 under the pulling of the connecting rod 335, the support area gradually decreases, and finally returns to the initial compact state, and is completely accommodated in the movable groove 32.

[0071] The movable groove 32 restores the empty space due to the resetting of the support part 33, and the new welding horn assembly can be directly placed in the movable groove 32 without waiting for the support part 33 to complete the complex structure adjustment, which greatly shortens the preparation time of the next cycle.

[0072] At the same time, the retracted state of the support rod 332 also avoids interference with the new workpiece when it is placed, ensuring that the new workpiece can be smoothly placed on the support plate 331, triggering the subsequent clamping and welding process, and forming a seamless cycle of “moving out-take resetting-loading”.

[0073] The support area of the welding assembly moving out stage is optimized, which further shortens the connection time of loading and unloading; the open space above the positioning frame 31 is taken away, the single operation time of the taking device 4 is shortened, and the taking frequency per unit time is improved by more than 40%;

[0074] The resetting of the support part 33 and the loading of the new workpiece can be prepared synchronously without waiting for the taking device 4 to completely withdraw, so that the cycle period of a single positioning part 3 is shortened by 15%-20% in welding+loading and unloading, which is especially suitable for large-scale continuous production scenes.

[0075] There is no interference between the taking device 4 and the positioning frame 31 during the taking process, reducing the collision and wear between the taking device 4 and the positioning frame 31, and prolonging the maintenance period of the taking device 4;

[0076] The expanded support area further reduces the damage rate of the assembly when it is moved out; the assembly is taken away above the positioning frame 31, and the operator does not need to approach the welding heat area inside the positioning frame 31. The temperature in the cavity of the positioning frame 31 after welding can reach 60-80℃, avoiding the risk of high-temperature scalding;

[0077] The expanded support area improves the stability of the assembly during the rising process, so that even if there is slight vibration such as workshop floor vibration, the assembly is not easy to fall off the support plate 331, reducing the equipment downtime and safety hazards caused by the falling of the assembly.

[0078] In the traditional device, the assembly after welding needs to be directly taken out from the narrow positioning frame 31 inner cavity, the support structure is mostly single-point support, and the assembly is easy to tilt during the rising process due to the deviation of the center of gravity, especially the membrane and resonance disc of the horn assembly and other precision components, slight tilt may cause the welding joint to crack. The device expands the linkage by the support rod 332 away from the connecting rod 335, forms an annular enlarged support, reduces the inclination rate when the assembly is removed, and completely solves the industry pain point of "removing damage".

[0079] In the traditional multi-station device, there is a "waiting gap" between the removal of the assembly of the previous cycle and the feeding of the next cycle; the new workpiece can be placed only after the support 33 is completely reset. In the device, the movable groove 32 has started to reserve space for the new workpiece during the process of the support 33 rising to remove the assembly, and the new workpiece can be prepared to be placed at the same time as the assembly is taken away, the "waiting gap" is shortened, the seamless connection of feeding and discharging is realized, and it is especially suitable for the production of automobile parts assembly line which has strict requirements on production rhythm.

[0080] Repeat the above steps of workpiece loading, automatic clamping, rotary welding, workpiece taking out and resetting to realize continuous batch production. During the production process, the operator only needs to check the equipment running state and workpiece welding quality regularly, without frequent intervention in the equipment operation.

[0081] The above embodiments are only used to illustrate the technical solutions of the present application, but not to limit it; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements will not make the essence of the corresponding technical solutions deviate from the protection scope of the technical solutions of the embodiments of the present application.

Claims

1. A multi-station rotary laser welding system for the assembly production of automobile horns, characterized in that, Include: Welding part (1); Material taking part (4); Rotary machine (2), the rotary machine (2) is located below welding part (1), the rotary machine (2) upper surface is provided with positioning part (3) along the circumference, positioning part (3) below welding part (1) is in welding area, positioning part (3) below material taking part (4) is in feeding and discharging area; The positioning part (3) includes the positioning frame (31) arranged on the upper surface of the rotary machine (2), the movable groove (32) is formed in the bottom of the positioning frame (31), the support (33) is arranged in the bottom of the movable groove (32), the ring groove (36) is formed in the inner wall of the movable groove (32), the extrusion block (35) is slidably connected to the inner wall of the ring groove (36), and the rubber layer (34) is symmetrically formed in the inner wall of the positioning frame (31). Wherein, the rubber layer (34) and extrusion block (35) are connected by linkage (37).

2. A multi-station rotary laser welding system for assembling and producing an automobile horn according to claim 1, characterized in that: The side edge groove (311) slidably connected with the rubber layer (34) is symmetrically formed in the inner wall of the positioning frame (31), and the circular groove (312) is formed in the middle of the inner wall of the side edge groove (311).

3. A multi-station rotary laser welding system for assembling and producing an automobile horn according to claim 2, characterized in that: The fixed plate (341) is fixedly connected to one side of the rubber layer (34) close to the circular groove (312), the rectangular groove is formed in the inner wall of the side edge groove (311), and the fixed plate (341) is slidably connected to the rectangular groove.

4. The multi-station rotary laser welding system for assembling and producing the automobile horn according to claim 3, characterized in that: The linkage (37) includes the abutting rod (371) embedded in the inner wall of the positioning spring (342), one end of the abutting rod (371) away from the fixed plate (341) is fixedly connected with the connecting plate (372), the bottom end of the connecting plate (372) is rotatably connected with the movable shaft (373), the movable shaft (373) is fixedly connected with the inner wall of the side edge groove (311), and the abutting rod (371) penetrates the circular groove (312).

5. A multi-station rotary laser welding system for the assembly of automobile horns as claimed in claim 4, wherein: The limit plate (351) is arranged at one end of the extrusion block (35) away from the center of the movable groove (32), and the limit plate (351) is rotatably connected with the bottom end of the connecting plate (372).

6. A multi-station rotary laser welding system for assembling and producing an automobile horn according to claim 1, characterized in that: The support (33) includes the telescopic piece (333) arranged at the bottom of the movable groove (32), the support rod (332) is arranged on the top of the outer wall of the telescopic piece (333) along the circumference, the side plate (334) is arranged on the top of the support rod (332), and the connecting rod (335) is arranged on the side of the side plate (334).

7. A multi-station rotary laser welding system for the assembly of automobile horns as claimed in claim 6, wherein: The support (33) further includes the support plate (331), the clamping groove is formed in the side of the support plate (331), the telescopic spring is sleeved on the outer wall of the connecting rod (335), and the telescopic spring is embedded in the clamping groove.

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