The broad and application prospect of laser groove cutting machine

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In the manufacturing process of shipbuilding, engineering machinery, petroleum pipelines, etc., the groove processing of thick steel plates has always been an indispensable process according to the design or process requirements. It is processed and assembled into a certain geometry at the parts to be welded of the weldment. The shape of the groove, the purpose of opening the groove is to get a full penetration of the weldment thickness of the weld. Commonly used groove forms are I-shaped groove, V-shaped (with blunt edge) groove, U-shaped (with blunt edge) groove, X-shaped (with blunt edge) groove, unilateral V-shape (with blunt edge) Groove and K-shaped (with blunt edges) groove.
At present, flame and plasma processing methods are generally used. Since the processing method will produce deeper cuts, the dents on these grooves are caused by the carelessness of grinding. If not eliminated before welding, the groove will not be fused. Generally, the depth of the dent must be more than 3mm. According to the provisions of the common rules, if it is in an important position, these dents can only be removed by grinding, and welding is not allowed. At the same time, because the flame plasma processing method belongs to the large heat source input processing method, the high-strength steel plate will generate heat deformation under the thermal processing mode. Therefore, this processing method also needs the process of anti-deformation, and becomes a difficult process of the groove processing. The laser processing is a new type of groove processing method with the smallest heat distortion and the best incision quality. In foreign countries, laser groove cutting machines have been widely used to process steel plates within 20 mm, and can form v, x, y, etc. slopes at one time. In the mouth, the groove processing completed by multiple processes such as traditional cutting and milling is completed once, which greatly improves the efficiency, ensures the quality, saves resources, and the quality of the cut parts is high, the dimensional accuracy is high, and the y,k, and other types of groove are uniform , With a high surface quality. For example, in the United States, the use of high-strength, low-alloy steel T-pieces in newly constructed new vessels has led to the use of laser processing and molding technology, which has resulted in a significant reduction in the weight of ships. In order to adapt to the needs of ocean flow mechanics, hull slabs are designed to have complicated three-dimensional curvature shapes. The laser-assisted plate forming technology can replace laborious, time-consuming and dangerous mechanical heating forming processes with good application prospects.
With the advancement of major projects such as railway construction, highway construction, water conservancy construction, hydropower construction, energy, mining construction, and construction in China, by 2015, the market demand for construction machinery in China will reach over 200 billion yuan, and the laser cutting machine Will be widely used in China's construction machinery industry. In particular, with the large-scale construction machinery, 800-MPa or higher-strength low-alloy high-strength steel structures are required. In order to ensure that the welded joints have good toughness, the heat of welding must be reasonably controlled to avoid embrittlement of the welded joints. The traditional heat Processing methods have not been able to adapt to the current high-strength steel sheet molding, so in the construction machinery industry, such as Sany Heavy Industry, Zoomlion has introduced a laser groove cutting machine.
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