Oblique Composite High-frequency Vibration Drawing Method for Metal Profiles

Abstract

The invention relates to a method for drawing metal section in an inclined composite high-frequency vibration manner. An inclined composite high-frequency vibration device is used for generating composite high-frequency vibration in a horizontal direction and a vertical direction of the metal section to act on a drawing die in a drawing process, thus, the friction coefficient between the metal section and the drawing die is reduced; the drawing die is elastically connected with a die holder of the machine base of a drawing machine, the composite high-frequency vibration device is fixed on a drawing machine tool by a mounting plate, a secondary amplitude-change pole in the composite high-frequency vibration device is fastened on and connected with the end surface of a drawing die holder, an included angle alpha between the axis of the composite high-frequency vibration device and the axis of the drawing die is 5-15 degrees, a piezoelectric ceramic transducer in the composite high-frequency vibration device generates high-frequency excitation frequency to drive a primary amplitude-change pole to vibrate at high frequency, and then the secondary amplitude-change pole vibrates at high frequency under the driving action of the primary amplitude-change pole; therefore, the drawing die is driven to do composite high-frequency vibration in the horizontal direction and the vertical direction.

Description

technical field [0001] The invention relates to the technical field of plastic processing of metal materials, in particular to a method for drawing metal profiles by oblique composite high-frequency vibration. Background technique [0002] Most of the traditional cold-drawn metal profiles are directly drawn by drawing dies. During the drawing process, due to the large friction coefficient between the metal profiles and the drawing dies, the corresponding resistance is also large, so the required drawing force is large and the drawing There are many drawing passes, and the mold is easy to wear and has a low service life. At the same time, there are scratches and microscopic cracks on the surface of the drawn metal profile; Vibration excitation, that is, the friction coefficient between the metal profile and the drawing die is reduced by using horizontal ultrasonic vibration excitation for the drawing die, but since the drawing die only generates vibration along the horizontal...

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Problems solved by technology

[0002] Most of the traditional cold-drawn metal profiles are directly drawn by drawing dies. During the drawing process, due to the large friction coefficient between the metal profiles and the drawing dies, the corresponding resistance is also large, so the required drawing force is large and the drawing There are many drawing passes, and the mold is easy to wear and has a low service life. At the same time, there are scratches and microscopic cracks on the surface of the drawn metal profile; Vibration excitation, that is, the friction coefficient between the metal profile and the drawing die is reduced by using horizontal ultrasonic vibration excitation for the drawing die, but since the drawing die only generates vibration along the horizontal direction of the metal profile, the metal profile The friction coefficient between the drawing die and the drawing die is still large, and there are still microscopic surface defects on the surface of the drawn metal profile

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