Electromagnetic thermoforming method and device for a metal material
A metal material and thermal forming technology, applied in metal processing equipment, forming tools, electric pulse generator circuits, etc., can solve the problems of insufficient electromagnetic forming force and low heating efficiency, so as to improve plasticity and solve the problem of insufficient electromagnetic forming force Effect
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Embodiment 1
[0068] The invention is described in detail for the forming of TC4 sheet material.
[0069] The selected TC4 alloy composition is:
[0070] Al V Fe C N O H Ti 6.5000 4.2500 0.0400 0.0200 0.0150 0.1600 0.0018 Bal.
[0071] The specific parameters are: the specific strength is 230N / m 2 , with a density of 4.5g / cm 3 , the working temperature range is -100℃~500℃, the heat intensity is high, and the thermal conductivity is 15.24W / (m.K).
[0072] Using a structure such as figure 1 The shown electromagnetic thermoforming device for metal materials includes a pulse current source 1, a switch 3, a forming coil 4, energized electrodes 5-1 and 5-2, a forming mold 6, an insulating layer 7, a TC4 sample to be formed 8, Sample blank holder 9, coil pressing block 10.
[0073] Among them, pulse current source 1 adopts a multi-peak pulse high current source topology. When n is 2, the topology diagram is as follows image 3As shown, the pulse current sour...
Embodiment 2
[0088] Embodiment 2 of the present invention provides a superplastic forming method for amorphous alloys: the difference between this embodiment and embodiment 1 is that the sample to be formed is replaced with a 1mm amorphous alloy Zr 35 Ti 30 Cu 7.5 be 27.5 At the same time, the amorphous alloy is heated to the supercooled liquid region close to the amorphous alloy through the first discharge, and the waveform of the second discharge is reasonably controlled so that the amorphous alloy is subjected to a huge electromagnetic force when it is in the supercooled liquid region. The role of amorphous superplastic deformation, until the film.
Embodiment 3
[0090] Invention Example 3 provides a superplastic forming method for amorphous alloys: the difference between this embodiment and Example 1 is that the sample to be formed is replaced with a 0.1mm amorphous alloy Zr 35 Ti 30 Cu 7.5 be 27.5 At the same time, the amorphous alloy is rapidly heated to the supercooled liquid region through the first discharge (the heating rate is greater than 1×10 3 K / s), at this time, although the electromagnetic force suffered by the current due to attenuation has decreased, the electromagnetic force at this time is still sufficient to make the viscous rheological characteristics presented (viscosity is 10 2 Pa · s or so) under the amorphous alloy to achieve superplastic forming. Then contact with the mold for instant cooling, so that the amorphous alloy in the high temperature state will not be crystallized or oxidized.
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Abstract
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