A kind of self-resistance heating incremental forming device and forming method

Abstract

The invention discloses a self-resistance heating progressive forming device and a forming method. The forming device comprises: a thin plate to be formed, a support model, a first rigid tool head, an insulating connecting rod, a wire, a second rigid tool head, an adjustable flexible Tool head group and low-voltage high-current pulse power supply; the thin plate to be formed is fixed on the support model; the first rigid tool head, adjustable flexible tool head group and second rigid tool head are sequentially installed on the insulating connecting rod; the first rigid tool head The processing end surface of the first rigid tool head and the processing end surface of the second rigid tool head are respectively located above two adjacent processing areas on the thin plate to be formed and contact the thin plate to be formed; the first rigid tool head and the second rigid tool head are respectively connected to low voltage and high current through wires The positive and negative poles of the pulse power supply form a local self-resistance heating loop. The invention utilizes the softening and creep properties of the titanium alloy material in a heated state to improve its plasticity, thereby reducing the forming force, improving the formability, and reducing the springback of the forming process and parts.

Description

technical field [0001] The invention relates to the technical field of numerical control thermal progressive forming, in particular to a self-resistance heating progressive forming device and a forming method. Background technique [0002] Titanium and titanium alloy materials not only have outstanding advantages such as high temperature resistance, corrosion resistance, high specific strength, fatigue resistance and wide service temperature range, but also titanium is rich in resources and can be recycled. Since the 1950s, due to the urgent need of aerospace technology, the titanium industry has developed rapidly, and titanium alloys have become more and more widely used in aerospace, shipbuilding, petrochemical, electric power, metallurgy, automobiles and daily life. , known as "space metal", "ocean metal" and "terrestrial metal", is an important strategic metal material. [0003] However, titanium alloy has a large yield strength ratio at room temperature, requires a lar...

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Problems solved by technology

[0003] However, titanium alloy has a large yield strength ratio at room temperature, requires a large forming force, and is easy to crack, so the plastic deformation range of titanium and titanium plates is very narrow; moreover, titanium alloys have a small elastic modulus at room temperature, so sheet After the gold is formed, the rebound is serious, it is not easy to fit the mold, and it is difficult to form

The above factors bring difficulties to the deformation of titanium alloys at room temperature

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