FIELD: technological processes.
SUBSTANCE: production is carried out at the end of pipe by plastic deformation of preliminary threaded profile with subsequent production of final profile by means of tool action to which ultrasonic vibrations are supplied during the manufacturing process of the final threaded profile. The preliminary threaded profile is produced by forming a section at the end of the pipe with a conical generatrix corresponding to the profile of the produced thread. Then this portion is placed in a die with threaded profile and preliminary profile of the thread is formed by expanding the end of the pipe with a conical punch.
EFFECT: threaded profile is strengthened and precision of the resulting conical thread is increased.
11 cl, 9 dwg
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