Views: 0 Author: Site Editor Publish Time: 2025-02-17 Origin: Site
There is indeed a risk of burning through the ultra-thin steel plate below 0.5mm during welding, because the steel plate is thin and can only withstand limited heat. Heat concentration during welding can easily cause the steel plate to melt quickly or even burn through. Here are some methods for controlling accuracy:
Laser welding: Using a high-energy density laser beam as a heat source, the material can be heated to a molten state in a short period of time to form high-quality welds. Its heat input is low, the heat affected zone is narrow, the welding speed is fast, and it can effectively reduce the accumulation of heat on the steel plate, reduce the risk of burn through, and is suitable for welding ultra-thin steel plates below 0.5mm.
Tungsten inert gas welding (TIG welding): It can accurately control the welding current and arc, concentrate heat, and has inert gas protection, which can ensure the quality of the weld seam. When welding ultra-thin steel plates, precise welding can also be achieved by adjusting parameters reasonably, but the welding speed is relatively slow.
Welding current: Current is a key factor affecting welding heat input. For ultra-thin steel plates below 0.5mm, a smaller welding current should be used, generally within a few tens of amperes, which should be determined through experiments based on the material and thickness of the steel plate.
Arc voltage: Appropriately reducing the arc voltage can make the arc energy more concentrated and reduce heat diffusion. Generally, the voltage is controlled at around 10-20V.
Welding speed: Increasing the welding speed can reduce the residence time of heat on the steel plate and lower the risk of burn through. But the speed cannot be too fast, otherwise it will cause poor fusion of the weld seam. Generally, the welding speed can be controlled at around 0.5-1 meter per minute.
Surface cleaning: Before welding, it is necessary to thoroughly remove impurities such as oil stains, rust, oxide films, etc. from the surface of the steel plate. Mechanical polishing or chemical cleaning methods can be used to ensure welding quality and uniform heat transfer.
Assembly accuracy: Ensure that the assembly gap of the welded parts is uniform and as small as possible, generally controlled within 0.1-0.2mm. If the gap is too large, defects such as burn through or weld bead are prone to occur during welding.
Design reasonable fixtures: Based on the shape and structure of ultra-thin steel plates, design specialized fixtures to firmly fix the steel plates in the welding position, preventing movement or deformation during the welding process. If multi-point clamping, elastic clamping and other methods are used to keep the steel plate stable during welding.
Consider clamping deformation: When designing fixtures, it is necessary to fully consider the steel plate deformation that may be caused by clamping force. By reasonably distributing clamping points and adjusting the clamping force, the impact of clamping deformation on welding accuracy can be reduced.
Commissioning in advance: before formal welding, conduct welding test on the test plate, adjust welding parameters, observe the weld formation, and conduct formal welding after obtaining satisfactory welding effect.
Real time monitoring: Advanced sensors and monitoring systems are used to monitor parameters such as current, voltage, and welding speed in real-time during the welding process. Once parameter abnormalities are detected, adjustments should be made promptly to ensure stable and reliable welding processes.
Operation skills: Welders should have proficient operation skills, maintain stable welding techniques, control the angle and distance between the welding gun or laser head and the steel plate, and evenly distribute heat on the weld seam.
