Intelligent laser welding system for welding copper sheet and copper bar

Abstract

The utility model discloses an intelligent laser welding system for welding a copper sheet and a copper bar. The intelligent laser welding system comprises a positioning conveying unit and a welding unit, the positioning conveying unit comprises a conveying guide rail module, and a positioning tool is mounted on the conveying guide rail module; the welding unit comprises a mechanical arm assembly, a laser generator is arranged at the moving end of the mechanical arm assembly, and the welding device further comprises a controller unit which is in signal connection with the conveying guide rail module and the welding unit. After the workpieces are conveyed in place, a welding program is controlled through a control button module, it is ensured that the optimal welding distance and angle relation is kept between the welding field lens and the workpieces and between the welding galvanometer and the workpieces under moving adjustment of a mechanical arm assembly, and in the welding process, the workpieces are pressed through a pressing module, so that the welding position is kept stable all the time; in the welding process, various parameters are displayed through the demonstrator module, and operation and control by technicians are facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to laser welding technical field, concretely relates to a kind of intelligent laser welding system for copper sheet and copper bar welding. BACKGROUND

[0002] In electrical equipment manufacturing, power transmission and many other fields, the reliable connection between copper sheet and copper bar workpieces plays a crucial role;Traditional connection methods mainly include bolt connection, riveting and ordinary electric arc welding, etc.

[0003] Although bolt connection is relatively simple to operate, it has the problem of loose connection points, and after long-term use, due to factors such as equipment vibration, it may cause the contact resistance to increase, thereby generating heat, affecting the normal operation and service life of electrical equipment. Riveting method is difficult to ensure the tightness and consistency of electrical conductivity, and cannot meet the requirements in some applications that require sealing.

[0004] When ordinary electric arc welding is used for connecting copper sheet and copper bar workpieces, it is easy to produce a large heat-affected zone at the welding site, causing the microstructure of the copper material to change, resulting in a decrease in its mechanical properties and electrical conductivity. At the same time, welding defects such as pores and slag are prone to occur during the welding process, which seriously affects the welding quality, and the appearance after welding is often not smooth and beautiful, and subsequent polishing and other processing procedures are required.

[0005] With the development of laser technology, laser welding has been gradually applied in the field of metal connection due to its high energy density, small heat-affected zone, fast welding speed and high welding quality, but the existing laser welding devices and processes for this specific welding object of copper sheet and copper bar workpieces still have deficiencies in positioning accuracy, flexibility in adapting to different size specifications of copper sheet and copper bar workpieces, and effective control of copper oxidation during the welding process, making it difficult to meet the requirements of efficient and high-quality production. SUMMARY

[0006] To overcome the shortcomings of the prior art, the purpose of the present utility model is to provide an intelligent laser welding system for welding copper sheet and copper bar, which can ensure accurate welding position and avoid welding defects due to inaccurate positioning. It also provides a laser welding device that can flexibly adapt to different size specifications of copper sheet and copper bar workpieces, enhancing the versatility of the device and enabling the laser welding of copper sheet and copper bar workpieces to better meet the requirements of large-scale industrial production.

[0007] The utility model discloses a technical scheme is: a kind of intelligent laser welding system for copper sheet and copper bar welding, including positioning conveying unit and welding unit;The positioning conveying unit includes conveying guide rail module, and positioning tool is installed on conveying guide rail module;The welding unit includes mechanical arm assembly, and the movement end of mechanical arm assembly is equipped with laser generator, and the laser output end of laser generator is equipped with welding galvanometer and welding field lens arranged upwards and downwards, and welding field lens below is also equipped with the compression module group for compressing welding workpiece;It further includes the controller unit with conveying guide rail module and welding unit signal connection, and controller unit is connected with demonstrator module group and control button module group.

[0008] In the technical scheme, the positioning conveying unit accurately conveys the positioning module with the workpiece to be welded to the welding position through the conveying guide rail module, and controls the welding program through the control button module after conveying in place, and the laser generator for welding moves to the workpiece above through the mechanical arm assembly to implement the welding process on the welding position, ensures the optimal welding spacing and angle relationship between welding field lens and welding galvanometer and workpiece under the movement adjustment of mechanical arm assembly, and the welding position is always kept stable through the compression of compression module group during welding process, and various parameters during welding process are displayed through the demonstrator module, which is convenient for technical personnel to operate and control.

[0009] Preferably, the positioning tool is provided with a welding station for placing copper bar and copper sheet workpieces, and a profiling positioning block for fixing the copper sheet and copper bar workpieces is arranged in the welding station.

[0010] Preferably, the welding station is provided with a profiling positioning block for positioning the copper sheet and copper bar workpieces.

[0011] Preferably, the movement end of the mechanical arm assembly is fixed with a mounting bracket for mounting the laser generator.

[0012] Preferably, the laser generator is provided with an automatic focusing module and a light spot adjusting module connected with the controller unit.

[0013] Preferably, the controller unit includes a parameter setting system and a monitoring system, the parameter setting system is used for inputting welding parameters, and the monitoring system is connected with a monitoring camera module and a sensor module for monitoring the welding area.

[0014] Preferably, the controller unit further includes a feedback system, which is used for comparing and analyzing the preset parameters and the monitoring parameters of the monitoring system, and controlling the welding parameters of the laser generator.

[0015] The utility model has the advantages of:

[0016] 1. The welding quality is significantly improved, thanks to the high-precision positioning clamp assembly, the welding position precision of the copper sheet and copper bar workpiece can reach millimeter level, effectively avoiding the welding defects caused by positioning errors, and the weld forming is uniform and beautiful; through the real-time accurate regulation and control of the controller unit on the welding parameters, the heat affected zone area of the workpiece is reduced by about 30% compared with ordinary laser welding devices, further ensuring the stability of the overall performance of the welded part.

[0017] 2. The device has strong versatility, the positioning conveying unit can flexibly cope with copper sheet and copper bar workpieces of different size specifications through positioning blocks and clamping modules, and can realize quick switching of welding objects for operation without replacing tooling or equipment within a certain range, greatly improving production efficiency and reducing production cost.

[0018] 3. The welding efficiency is obviously improved, the controller unit optimizes the welding parameters and welding process while ensuring the welding quality, uses the monitoring and feedback system to increase the welding speed by about 20% compared with the traditional laser welding method, and reduces the rework caused by welding defects, accelerates the overall production rhythm, is more suitable for the rhythm of large-scale industrial production, helps enterprises to improve production capacity and enhance market competitiveness. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or prior art description. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual proportion.

[0020] Figure 1 The structural diagram of the intelligent laser welding system for welding copper sheet and copper bar provided in the embodiments of the present application.

[0021] Figure 2 The positioning conveying unit schematic diagram of the intelligent laser welding system for welding copper sheet and copper bar provided in the embodiments of the present application.

[0022] Figure 3 The welding unit schematic diagram of the intelligent laser welding system for welding copper sheet and copper bar provided in the embodiments of the present application.

[0023] Figure 4 The control flow schematic diagram of the intelligent laser welding system for welding copper sheet and copper bar provided in the embodiments of the present application.

[0024] The reference signs are: conveying guide rail module 100, positioning tool 200, laser generator 300, welding vibration mirror 400, welding field mirror 500, pressing module 600, welding station 700, profiling positioning block 800, mounting frame 900, mechanical arm assembly 1000. DETAILED DESCRIPTION

[0025] The embodiments of the technical scheme of the utility model will be described in detail below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical scheme of the utility model, and therefore only serve as examples, and cannot limit the protection scope of the utility model.

[0026] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in the present application should be the usual meaning understood by the technical personnel in the field to which the utility model belongs.

[0027] As shown in Figures 1 to 4 The utility model embodiment provides a kind of intelligent laser welding system for copper sheet and copper bar welding, including positioning conveying unit and welding unit;The positioning conveying unit includes conveying guide rail module 100, and positioning tool 200 is installed on conveying guide rail module 100;The welding unit includes mechanical arm assembly 1000, and the movement end of mechanical arm assembly 1000 is equipped with laser generator 300, and the laser output end of laser generator 300 is equipped with welding vibration mirror 400 and welding field mirror 500 arranged upwards and downwards, and pressing module 600 for pressing welding workpiece is further equipped below welding field mirror 500;It further includes the controller unit that is signal connected with conveying guide rail module 100 and welding unit, and controller unit is connected with demonstrator module and control button module.

[0028] As shown in Figures 1 to 4 In the embodiment, positioning conveying unit is accurately conveyed to welding position by conveying guide rail module 100 with positioning module being placed with the workpiece to be welded, and welding procedure is controlled by control button module after being conveyed to position, and laser generator 300 for implementing welding moves to the upper of workpiece by mechanical arm assembly 1000 to implement welding procedure to its welding position, and welding field mirror 500 and welding vibration mirror 400 are kept with the best welding spacing and angle relationship between workpiece under the movement adjustment of mechanical arm assembly 1000, and workpiece is pressed by pressing module 600 during welding process to keep welding position stable all the time, and various parameters are displayed by demonstrator module during welding process, to facilitate technical personnel operation control. In the embodiment, mechanical arm assembly 1000 has multiple degrees of freedom (usually 6 degrees of freedom or more, depending on welding process requirement and workspace range), and can freely stretch, rotate and position in three-dimensional space with high movement precision. High-performance servo motor and precision speed reducer are equipped in each joint position of mechanical arm, which makes it accurately move to target position after receiving control instruction.

[0029] As Figures 1 to 3 shown, in order to be suitable for welding of different specifications of workpieces, the positioning tool 200 for placing the workpieces in the embodiment is provided with a welding station 700 for placing copper sheet and copper bar workpieces, and the welding station 700 is provided with a profiling positioning block 800 for fixing the copper sheet and copper bar workpieces. In this way, after the copper sheet and copper bar to be welded are placed in the welding station 700, the relative position for welding is maintained by the profiling positioning block 800, and after positioning, the workpieces are uniformly pressed from top and bottom by the pressing die set 600, so as to ensure that they remain stable during the welding process and improve the welding precision. In actual application, the pressing die set 600 for fixing the welding position is a pneumatic or electric pressing die set 600, and the pressing structure adopts the existing technical specifications, which will not be described here.

[0030] In order to ensure that the welding equipment is stably installed at the moving end of the mechanical arm assembly 1000, the mounting bracket 900 for mounting the laser generator 300 is fixed at the moving end of the mechanical arm assembly 1000 in the embodiment.

[0031] As Figures 1 to 3 shown, in actual operation, different welding parameters are required for different specifications of welding workpieces, and the laser generator 300 is provided with an automatic focusing module and a spot adjusting module connected with the controller unit in the embodiment. The laser can be automatically focused on the welding area by the automatic focusing module, and the laser spot can be controlled by the spot adjusting module. Therefore, in different working conditions, the technician can dynamically adjust the parameters such as the size and focal length of the laser spot according to the different thicknesses of the copper sheet and copper bar workpieces and the welding process requirements, so as to ensure that the laser energy is accurately focused on the welding position, to adapt to the welding of different specifications of workpieces, and to realize the self-adaptive welding of different sizes of copper sheet and copper bar workpieces.

[0032] As Figure 4As shown, the controller unit in this embodiment includes a parameter setting system for inputting welding parameters and a monitoring system connected with a monitoring camera module and a sensor module for monitoring the welding area. The controller unit also includes a feedback system for comparative analysis of the preset parameters and the monitoring parameters of the monitoring system and control of the welding parameters of the laser generator 300. In this way, the control unit integrates welding parameter setting components, welding process monitoring components and feedback adjustment components. The operator can pre-set key welding parameters such as laser power, welding speed, pulse frequency (applicable to pulse laser welding) and the like through the welding parameter setting module, the welding process monitoring module uses various sensors and cameras and the like to monitor the parameters of the welding area in real time, the sensors include temperature sensors, optical sensors and the like, which can monitor temperature changes, weld forming conditions and the like, and the feedback system compares and analyzes the monitored data with the preset parameters, which is conducive to the automatic fine adjustment of the laser power, welding speed and other parameters by the control system in a timely manner, ensures the stability of the welding process, reduces the heat affected zone and improves the welding quality and efficiency.

[0033] When the device is actually operated, the operation steps are as follows: first, the workpiece to be laser welded (such as a copper sheet and copper bar workpiece) is accurately loaded into the welding station 700; the profiling positioning block 800 and the pressing module 600 can be quickly adjusted in place according to the shape profile and size data of the workpiece, so as to ensure that the workpiece does not displace during subsequent conveying and welding.

[0034] The operator comes to the operation console and selects the corresponding welding program through the teach pendant module. The teach pendant module has an intuitive and easy-to-understand operation interface, which clearly lists various pre-set welding program options. These programs are determined in advance through a large number of process tests and optimization according to different workpiece materials, thicknesses, welding joint forms and other factors. The operator only needs to select the corresponding welding program icon on the teach pendant module according to the specific characteristics of the current workpiece to be welded to complete the selection operation.

[0035] After the welding program is selected, the operator starts the device through the control button module, and the conveying guide rail module 100 starts to run smoothly according to the preset motion trajectory and speed. Here, the conveying guide rail module 100 relies on high-precision linear guides, servo motors and precise transmission devices (such as synchronous belts, ball screws, etc.) to convey the workpiece to the specified welding position, ensuring the accuracy of the starting position of the subsequent laser welding.

[0036] After the workpiece is conveyed to the position, the mechanical arm assembly with the preset action program starts to act, so that the welding field mirror and the welding galvanometer move to the upper side of the welding area, and the pressing module is accurately pressed according to the preset pressing path and force, so that the welding field mirror and the welding galvanometer and the workpiece maintain the optimal welding spacing and angle relationship. The pressing module stably presses the welding area through multiple pressing heads uniformly distributed around the welding area with appropriate pressure, effectively preventing the welding position from deviating due to the impact of laser energy or the slight deformation of the workpiece itself during the welding process. The monitoring camera starts to work during the welding process, and the welding area is photographed in real time. The teach pendant module clearly displays the welding area image captured by the coaxial camera at this time, and synchronously displays the currently set laser welding parameter information, which includes laser power, pulse frequency, welding speed, spot diameter and other key elements. The technician can check and confirm the welding area in the image and the welding parameters according to professional knowledge and practical experience. Once it is confirmed that there is no problem, the technician can issue an instruction to make the whole welding system continuously and automatically weld the workpiece.

[0037] During the laser welding process, the laser generator stably outputs a high-energy-density laser beam according to the preset parameters, and the laser beam is accurately focused on the welding area, so that the metal material at the contact position of the workpiece is rapidly melted and fused in a very short time, forming a firm and reliable welding joint. The welding system monitors the parameter changes during the welding process in real time, such as monitoring the fluctuation of laser energy through an optical sensor and monitoring the temperature change of the welding area through a temperature sensor. Once any abnormal condition is found to be outside the preset allowable range, the system will immediately issue a warning and automatically pause the welding operation, waiting for the technician to check and adjust accordingly. After the whole welding area is welded according to the preset welding path and process requirements, the mechanical arm will follow the set homing program, and the pressing module will release the pressing state of the workpiece, and the conveying guide rail module will stably convey the welded workpiece to the original position, preparing for subsequent welding and other work. Thus, a complete and efficient laser welding operation process is completed.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them. 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 described in the foregoing embodiments, or make equivalent substitutions for part or all of the technical features. These modifications or substitutions do not change the essence of the corresponding technical solutions, which should be covered within the scope of the claims and description of the present application.

Claims

1. An intelligent laser welding system for welding copper sheets to copper busbars, characterized in that, Includes a positioning and conveying unit and a welding unit; The positioning and conveying unit includes a conveying guide rail module (100), on which a positioning fixture (200) is installed; The welding unit includes a robotic arm assembly (1000), the moving end of the robotic arm assembly (1000) is equipped with a laser generator (300), the laser output end of the laser generator (300) is equipped with a welding galvanometer (400) and a welding field mirror (500) arranged vertically, and a clamping module (600) for clamping the welding workpiece is also provided below the welding field mirror (500). It also includes a controller unit that is connected to the conveyor rail module (100) and the welding unit, and the controller unit is connected to the teach pendant module and the control button module.

2. The intelligent laser welding system for welding copper sheets and copper busbars according to claim 1, characterized in that, The positioning fixture (200) is provided with a welding station (700) for placing copper sheet and copper busbar workpieces, and a contour positioning block (800) for fixing copper sheet and copper busbar workpieces is provided in the welding station (700).

3. The intelligent laser welding system for welding copper sheets and copper busbars according to claim 2, characterized in that, The welding station (700) is equipped with a contour positioning block (800) for positioning copper sheet and copper busbar workpieces.

4. The intelligent laser welding system for welding copper sheets and copper busbars according to claim 1, characterized in that, The moving end of the robotic arm assembly (1000) is fixed with a mounting bracket (900) for mounting a laser generator (300).

5. The intelligent laser welding system for welding copper sheets and copper busbars according to claim 1, characterized in that, The laser generator (300) is equipped with an automatic focusing module and a spot adjustment module that are connected to the controller unit via signals.

6. The intelligent laser welding system for welding copper sheets and copper busbars according to claim 1, characterized in that, The controller unit includes a parameter setting system and a monitoring system. The parameter setting system is used to input welding parameters, and the monitoring system is connected to a monitoring camera module and a sensor module for monitoring the welding area.

7. The intelligent laser welding system for welding copper sheets and copper busbars according to claim 6, characterized in that, The controller unit also includes a feedback system, which is used to compare and analyze the preset parameters and the monitoring parameters of the monitoring system, and to control the welding parameters of the laser generator (300).

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