A device and method for forming pipe fittings based on electromagnetic attraction

Abstract

The invention discloses a pipe fitting forming device and method based on electromagnetic attraction. The end of a metal pipe fitting is fixed; a solenoid forming coil is fixedly arranged at the outer part of a metal pipe fitting forming region in a sleeving manner; a forming gap is formed between the solenoid forming coil and the metal pipe fitting; and the solenoid forming coil is connected with a discharging circuit. The discharging circuit is used for applying wide width pulse current into the solenoid forming coil, and applying narrow width pulse current at a wide width pulse current peak, so that the synthesized current has a slow rising edge and an abrupt falling edge. At the rising edge of the synthesized current, the metal pipe fitting is stressed by repulsive force; at the falling edge of the synthesized current, the metal pipe fitting is stressed by attractive force; the attractive force is much larger than the repulsive force; the forming region of the metal pipe fitting moves towards the direction of the solenoid forming coil arranged at the outer part of the metal pipe fitting. Through the adoption of the pipe fitting forming device disclosed by the invention, a conventional manner of electromagnetic force manner can be changed, limitation in the prior art is overcome, and the application range of electromagnetic forming of pipe fittings is expanded, so that demands for different processing workpieces can be met.

Description

Technical field [0001] The invention belongs to the field of metal forming and manufacturing, and particularly relates to a tube forming device and method based on electromagnetic attraction, which is mainly used for forming and processing metal tubes. Background technique [0002] Electromagnetic forming is a high-energy, high-rate pulse forming technology. Compared with quasi-static forming, it has significant advantages such as fast forming speed, high forming quality, effective improvement of blank forming ability, clean and pollution-free. Therefore, it plays an important role in the lightweight process of aerospace, aviation, automobile and other manufacturing industries. Among them, lightweight alloys such as titanium alloys, aluminum alloys, and magnesium alloys are the preferred materials for lightweighting. However, these light alloys have poor forming plasticity at room temperature, and traditional forming methods are prone to wrinkles and springback; even limited by ...

AI Technical Summary

Problems solved by technology

However, the existing pipe fittings are still limited by the size of the blank and the coil, and the bulge forming of small pipes is difficult, which limits its application scenarios

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