Drawing method of special-shaped titanium tube

Abstract

The invention discloses a drawing method of a profiled titanium tube. The drawing method comprises the steps of smearing a lubricant on a tubing, drying the tubing, and carrying out drawing on the tubing through adopting an isothermal heating drawing system. The isothermal heating drawing system sequentially comprises a variable frequency speed regulating feeding device used for feeding, a guide supporting wheel group, a coil type superaudio heater, a profiled external mold and an automatic hydraulic fixture, wherein a photoelectric sensor is mounted outside the profiled external mold; a hydraulic speed regulating pulling machine is connected at the back of the automatic hydraulic fixture; the tubing is fed into the coil type superaudio heater to be heated through the variable frequency speed regulating feeding device and the guide supporting wheel group; then, the heated tubing enters the profiled external mold; when the photoelectric sensor captures an induction signal of a tube head of the tubing, the automatic hydraulic fixture clamps the tube head; and the hydraulic speed regulating pulling machine pulls the automatic hydraulic fixture to draw the tubing into a profiled titanium tube finished product. According to the drawing method, the tubing can be formed through one-time drawing, the working efficiency is high, and the quality of the profiled titanium tube obtained through drawing is high.

Description

technical field [0001] The invention relates to the technical field of titanium tube production, in particular to a drawing method for a special-shaped titanium tube. Background technique [0002] Due to the poor plastic deformation of titanium tubes at room temperature, the ratio of yield limit to elastic modulus of titanium is large, and the rebound ability of titanium tubes is large when they are formed, it is difficult to cold-roll and cold-draw titanium special-shaped tubes. In the process, defects such as cracks and folds on the inner and outer surfaces are easily generated, or the method of multiple drawing is used, but this method not only increases the cost and prolongs the production cycle, but the quality of the inner and outer surfaces of the pipe cannot be guaranteed, and it is difficult to guarantee the quality of the pipe. strength performance. Contents of the invention [0003] The technical problem mainly solved by the present invention is to provide a dr...

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Problems solved by technology

[0002] Due to the poor plastic deformation of titanium tubes at room temperature, the ratio of yield limit to elastic modulus of titanium is large, and the rebound ability of titanium tubes is large when they are formed, it is difficult to cold-roll and cold-draw titanium special-shaped tubes. In the process, defects such as cracks and folds on the inner and outer surfaces are easily generated, or the method of multiple drawing is used, but this method not only increases the cost and prolongs the production cycle, but the quality of the inner and outer surfaces of the pipe cannot be guaranteed, and it is difficult to guarantee the quality of the pipe. strength performance

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