Cold drawn tube processing is a new type of high-tech energy-saving products. The promotion and application of high-precision cold-drawn tubes is of great significance for saving steel, improving processing efficiency, saving energy, and reducing investment in hydraulic cylinders and cylinder processing equipment.
Cold drawing method and characteristics of cold drawn tube
1. High production efficiency: To a certain extent, it is mainly used to produce a cylinder tube with an inner diameter of 420 mm and a length of 12 meters for 154 hours, and it takes only 4 minutes to produce by cold drawing.
2. The high efficiency of the cold drawn tube is high: during the operation, due to the guiding function of the rolling head of the boring hole, during the cutting process, the blank tube will have deflection due to its own weight, causing the rolling head and the boring tool to go. Partial, causing waste. The authentic rate can only reach about 60%, and the cold drawing method can produce more than 95%.
3. High metal utilization rate of cold drawn tubes "" The cylinder is manufactured by the traditional boring method, and the metal utilization rate is only 50-70%. When produced by the drawing method, the metal is not only cut into iron, but can be extended by 30%, and the metal utilization rate can reach 95%.
4. It can improve the mechanical properties of the finished pipe metal: it can be produced by drawing method, so that the blank can be plastically deformed by more than 30%, and the strength limit of the finished pipe metal is greatly improved due to work hardening. Generally, the strength limit of the inner layer of the finished pipe is increased by 60%. The high-precision cold-drawn tube is made of seamless hot-rolled steel pipe and straight seam welded pipe. After chemical treatment, it is drawn on a special cold drawing machine through a special deformation principle to produce a high-precision pipe.