The quality of the material edge of the cold drawn tube is one of the key factors to complete the good forming of the tube blank. In foreign countries, the edge milling machine is widely used for material edge treatment to ensure the edge quality and the geometric shape that meets the technological requirements. In the process, a special edge planing machine is used for special edge treatment of the material. After the material enters the forming unit, the fin forming hole undergoes increased extrusion force to process the edge to an appropriate shape to ensure the welding extrusion force. Such an organization can reduce the equipment investment to 1/15 of the milling machine, and the operating cost is only 1/5 of the milling machine on the premise of meeting the technological requirements.
The droplet transition process is closely related to the quality of cold drawn pipe products, and its research has the following important significance: (1) The effect of cold drawn pipe smelting. The smaller the droplet particles, the larger the specific surface area, and the better the melting effect, and vice versa. (2) Manipulation that affects the arc length. When the length of the melting arc is too short, such as
Current position: The droplet transition process is closely related to the quality of cold drawn pipe products, and its research has the following important significance:
(1) Affect the effect of cold drawn pipe smelting. The smaller the droplet particles, the larger the specific surface area, and the better the melting effect, and vice versa.
(2) Manipulation that affects the arc length. When the length of the smelting arc is too short, such as about 10mm, this length is similar to the size of the metal droplet, which will cause a short circuit between the electrode and the molten pool, which will cause the arc to calm down and interrupt the smelting. Perhaps the temperature of the molten pool changes sharply due to frequent short circuits. Both of these conditions will damage the normal smelting process and also affect the uniformity of the titanium ingot structure. Therefore, the arc length of smelting is generally controlled above 15mm.
(3) Affect the surface quality of cold drawn tubes. As a result of the dispersion of the metal droplets, a small part of the metal splashes and adheres to the crucible; the effect of the arc on the molten metal pool will also cause splashing; coupled with the rotation of the molten pool and the metal volatiles and impurities in the crucible wall Adhesion on it constitutes the riser of the ingot. Because the riser cannot be well melted by the molten metal pool, and more impurities are adsorbed or adhered, the titanium ingot must be flattened and peeled before it can be processed.
Cold drawn pipe is a long steel with a hollow section and no joints on the periphery. The inside of the pipe is hollow and has a certain cross-sectional area. Many pipes used to transport fluids, such as pipes for transporting oil, gas, gas, water and certain solid materials, etc. The cross section of the ring bears internal or external When the radial pressure is applied, the force is relatively uniform, therefore, most steel pipes are round pipes.
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