Drawing head in the production of cold drawn seamless steel tube
At present, in the production of cold drawn seamless steel pipe, usually in order to smooth the steel pipe through the mold film hole before cold drawing, a W head should be made at one end of each steel pipe. The loss length of the steel pipe with a diameter of less than 110mm is generally 150mm-200mm. If the steel pipe is larger, the length should be longer. At the same time, the larger steel pipe should be started, and a variety of different types of starting equipment should be added. The metal loss is too large, and the equipment investment cost is large.
The technical problem to be solved is to provide a kind of drawing head in the production of cold drawn seamless steel pipe, which can not only meet the requirements of cold drawn deformation of steel pipe through the film hole smoothly, but also reduce metal loss, improve the yield, reduce the production cost and reduce the cost of equipment.
The drawing head in the production of cold drawn seamless steel pipe comprises a forging head and more than three blades. The forging head has no forging head body and forging head end face. The forging head body and forging head end face are integrated into a " ⊥" type, and the blade and forging head end face are fixedly connected as tripod-shaped.
After adopting the above technical scheme, cold drawn seamless steel tube, the above drawing head pot shape blade welding on the steel pipe end face directly, can be cold drawing operations, with the existing technology in each pipe at one end of the heading directly, has the advantages: one is the loss of metal is greatly reduced, the loss of metal is 13-30% lower than heading directly, to reduce its advantage is more obvious; Two is to reduce the investment of equipment; Third, the drawing head is simple to produce and easy to operate; Fourth, the pulling head can be repeatedly used. Therefore, the use of steel tube welding drawing head is an effective method to reduce metal loss, improve the yield of finished products and reduce production costs.
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