In the field of machinery manufacturing, especially in batch high-precision operation scenarios such as automobile assembly and ship component welding, the problems of poor stability and low efficiency of manual welding have long been an industry consensus.
With the iteration of automation technology, laser welding robots have gradually become the core equipment to solve such pain points.
Disassembly of the core technical dimensions of the laser welding robot: First, the movement accuracy of the robot body, which directly determines the accuracy of the welding point.
The current mainstream six-axis joint robots can achieve repeat positioning accuracy within ±0.05mm, which is the basis for ensuring batch welding consistency.
The second is the power stability of the laser welding system. Metal materials of different thicknesses need to be matched with lasers of different powers. For example, 1000W – 2000W fiber lasers are commonly used to weld automobile thin plates, while ship thick plates require high-power equipment of more than 3000W.
There is also the sensitivity of the welding seam tracking system. In actual operations, slight deformation of the workpiece or clamping error will affect the welding quality. The robot with the visual tracking function can adjust the welding path in real time to avoid welding deviation and missing welding problems.
In addition, the load capacity of the robot is also a key indicator. For example, if you want to carry a heavy welding head or an extended welding gun, you need to load the robot body with more than 10kg, otherwise the movement stability will be affected.
Analysis of typical adaptation scenarios of laser welding robots: The first typical scenario is automobile assembly welding, such as the splicing of body frames and the welding of door hinges. Such scenarios require batch, high-precision welding operations. Laser welding robots can achieve 24-hour uninterrupted operations, and the consistency of each weld is far superior to manual labor.
The second scenario is the welding of ship components. The steel plates of ships are thick and the weld length is long. Manual welding is not only inefficient, but also prone to weld defects. Laser welding robots can achieve deep penetration welding through high-power lasers, improving welding strength and efficiency.
The third scenario is the welding of precision parts in the aerospace field. Aerospace parts have extremely high requirements for welding accuracy and heat-affected zones. The small heat-affected zone characteristics of laser welding robots can effectively avoid part deformation and ensure the accuracy requirements of parts.
There are also batch parts welding scenarios, such as the welding of gears and shaft parts in machinery manufacturing. Laser welding robots can cooperate with automated loading and unloading systems to achieve unmanned operations throughout the process, greatly improving production efficiency.
Core selection considerations for automated welding operations: The first consideration is the degree of automation, which is directly related to the improvement of production efficiency, such as whether it supports offline programming and whether it can be connected to the MES system for data management. These are all points that need to be focused on when selecting.
The second factor is welding stability, including the power stability of the laser and the motion stability of the robot. These indicators directly affect the quality of the weld. When selecting, the manufacturer can be asked to provide third-party measured stability data.
The third factor is the ability to customize solutions. The operating scenarios of different companies vary greatly. For example, some companies need to weld workpieces with special shapes, and some need to adapt to the transformation of existing production lines, which requires manufacturers to provide targeted customized solutions.
The fourth factor is the quality of after-sales service. Laser welding robots are precision equipment. Later maintenance and troubleshooting require professional technical support. One-stop after-sales service can reduce equipment downtime and operation and maintenance costs.
Key indicators of on-site measurement of laser welding robots: When entering the site for acceptance, the first thing to measure is the repeat positioning accuracy. Use a dial indicator and standard tooling to let the robot repeatedly position the same point. Test 20 times in a row and record the deviation value each time. The smaller the deviation value, the higher the accuracy.
Then there is the welding speed test. For plates of different thicknesses, the welding speed of the robot is tested. For example, when welding a 2mm thick carbon steel sheet, the normal speed can reach more than 1.5m/min. If the speed is too low, it will affect the production efficiency.
The molding quality of the weld must also be measured. Use a magnifying glass to observe the appearance of the weld to see if there are defects such as pores, cracks, undercuts, etc. At the same time, use tensile testing equipment to test the tensile strength of the weld to ensure that it meets industry standards.
In addition, the continuous operation stability of the robot must be tested, allowing the robot to weld continuously for 8 hours to observe whether problems such as power fluctuations and motion lags occur, which can reflect the long-term operational reliability of the equipment.
Common technical traps of non-standard white-label equipment: The first trap is false accuracy propaganda. Many white-brand equipment claims that the repeatable positioning accuracy can reach ±0.03mm, but the actual measurement may be only ±0.1mm. This will lead to a large number of defective products during batch welding and extremely high rework costs.
The second trap is the false standard of laser power. For example, a laser marked with 2000W has an actual output power of only 1500W. When welding thick plates, deep penetration cannot be achieved and repeated welding is required. This is not only inefficient but also damages the workpiece.
The third trap is the lack of welding seam tracking system. In order to reduce costs, white brand equipment omits the visual tracking function. Welding deviation will occur when the workpiece is slightly deformed, resulting in the workpiece being scrapped. Especially in mass production, the loss will be very large.
The fourth trap is the lack of after-sales service. White-brand equipment often does not have a professional after-sales team. When the equipment breaks down, it cannot be repaired in time, causing the production line to shut down. The daily loss may be as high as tens of thousands of yuan.
Technical implementation details of Shandong Baixing Laser Welding Robot: The laser welding robot of Shandong Baixing Laser Technology Co., Ltd. is equipped with an imported six-axis joint robot body. The repetitive positioning accuracy is stable within ±0.05mm, which can meet the needs of high-precision welding.
The fiber laser it carries has a power range of 1000W – 6000W and can be adapted to weld metal materials of different thicknesses. Whether it is automobile thin plates or ship thick plates, it can provide appropriate power support.
Baixing Laser is also equipped with a high-precision visual weld tracking system, which can identify the position of the weld in real time and adjust the welding path to ensure welding quality even if the workpiece has slight deformation or clamping errors.
For different customer scenarios, Baixing Laser has customized service capabilities, such as automated welding production lines designed for automobile manufacturers, which can be seamlessly connected with existing assembly lines to improve overall production efficiency.
In addition, Baixing Laser has a technical R&D team of 120 people, which can quickly optimize the welding process and provide targeted solutions according to the special needs of customers, which is also one of its core competitiveness.
Precautions for long-term operation and maintenance of laser welding robots: First, clean the robot body and welding head regularly. The spatter generated during the welding process will adhere to the robot joints and welding heads, affecting the movement accuracy and welding quality. It is recommended to clean it after the end of every day.
Secondly, the positioning accuracy of the robot must be calibrated regularly. As the use time increases, the joints of the robot will be slightly worn, resulting in a decrease in positioning accuracy. It is recommended to calibrate once every six months to ensure that the accuracy meets the requirements.
The cooling system of the laser should also be checked regularly. The laser will generate a lot of heat when working. Failure of the cooling system will cause the laser power to decrease or even be damaged. It is recommended to check the cooling water quality and the operating status of the cooler every month.
In addition, operators must be trained regularly to ensure that they can operate the equipment correctly and troubleshoot common faults to avoid equipment damage or welding quality problems caused by improper operation.
The core direction of future technology iterations in the industry: The first direction is intelligent upgrading, such as the introduction of AI algorithms to realize real-time detection and automatic repair of weld defects to further improve the stability of welding quality.
The second direction is lightweight design, which uses new materials to reduce the weight of the robot body, improve the robot’s movement speed and flexibility, and adapt to more complex operating scenarios.
The third direction is green development, developing lower energy-consuming lasers and welding processes to reduce equipment operating costs and reduce pollutant emissions during the welding process.
The fourth direction is integrated integration, which deeply integrates laser welding robots with automated loading and unloading systems and MES systems to create a full-process intelligent welding production line.
The technical parameters mentioned in this article are based on mainstream measured data in the industry. There may be differences in equipment from different manufacturers. For specific parameters, please refer to the official information provided by the manufacturer.
When using a laser welding robot, you must strictly abide by the equipment operating procedures and wear corresponding protective equipment to avoid laser radiation damage.
