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• Release time：2025-02-25 09:19
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【概要描述】Used pipe welding machine and straightener have a close supporting relationship in the production process, especially in the straightening link after the welding pipe forming, the straightener is the key equipment to ensure the straightness and quality of the pipe. The following analyzes the relationship between the two from the three aspects of functional correlation, technical requirements and market support, and provides suggestions based on the characteristics of second-hand equipment: First, functional correlation: collaboration between welded pipe production and straightening process Straightening requirements of welded pipe after forming During the welding process of the used high-frequency pipe welding machine, the welding pipe may be bent or deformed due to the factors of thermal stress, roll pressure or cooling inequality. At this time, it is necessary to correct the pipe through the straightener to make it meet the straightness requirements. By applying reverse stress, the straightener adjusts the internal stress distribution of the pipe and restores its shape. The synergistic effect of sizing machine and straightening machine According to the production practice, the sizing machine is the basic equipment of the straightening process, which provides a fixed fulcrum for the straightening machine, and forms a force point with the active fulcrum of the straightening head. If the sizing machine is not stable (such as roll damage or tube thickness changes), the straightening effect will be significantly reduced, causing the welded pipe to bend or float. Second, technical requirements: the core conditions of supporting equipment Stability of sizing machine The rolling force and direction of the sizing machine should be kept stable, otherwise it is difficult for the straightener to dynamically balance the internal stress of the welded pipe. Used equipment needs to focus on checking the bearing status of the sizing machine, roll wear, and the effectiveness of the cooling system. Type selection of straightener Cold straightener: Suitable for seamless steel pipe or high-strength welded pipe, precise force through V-shaped contact surface, suitable for scenes with high accuracy requirements. Multi-roll straightener (such as nine-roll straightener) : common in ordinary welded pipe production lines, used markets in Linqing and other places can be seen by ton pricing (about 6000 yuan/ton) batch equipment. Select the type of straightener according to the material of the welded pipe (such as spiral welded pipe and high-frequency welded pipe), and ensure that the position of the weld is stable to avoid stress imbalance. Third, the second hand equipment matching precautions Device compatibility check When purchasing a used pipe welding machine, it is necessary to confirm the model and parameters of the original supporting straightener (such as the number of rolls, the range of force), or purchase a suitable second-hand straightener separately. For example, the nine-roll Type 6500 straightener mentioned on page 4 is suitable for medium-scale production lines. Debugging and maintenance Before the used equipment is put into use, it is necessary to debug many times, especially the matching parameters of the sizing machine and the straightener (such as the direction and size of the force). If it is found that the straightening of the welded pipe is difficult, it is necessary to prioritize the rolling stability of the sizing machine and the deviation of the weld position. Market availability The transfer information of used welded pipe units is mostly found on platforms such as processing networks, but attention should be paid to verification access restrictions. There are more cases of independent sale of straighteners, such as three batch transactions in Liaocheng market, and it is recommended to inspect the goods on the spot to avoid the risk of fraud. Sum up The matching of used pipe welding machine and straightener should take into account the process coordination, equipment compatibility and market adaptation. It is recommended to give priority to the welding pipe unit that includes the sizing machine, and to purchase a used straightener after debugging (such as a cold straightener or a multi-roll straightener), while paying attention to equipment maintenance and parameter calibration to ensure production efficiency and product quality. For more information, please pay attention to the website of Jinyujie Mechanical and Electrical Used Pipe Mill Supplier：www.usedpipemill.com JinYuJie-Used Pipe Mills Supplier（Please click the link→) :second-hand pipe mill