A forming method and device based on an air-core coil

A technology of hollow coils and forming coils, which is applied in the field of material forming and manufacturing, can solve the problems of low forming utilization rate and limited reinforcement layer, and achieve the effects of enhanced forming force, improved service life and energy saving

CN108838271BActive Publication Date: 2019-10-25HUAZHONG UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2019-10-25

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Abstract

The invention discloses a formation method based on a hollow coil. The formation method comprises the following steps of: controlling a forming coil to discharge electricity; generating a forming magnetic field inside the forming coil so that an inductive loop composed of a to-be-formed sample part and a conducting block generates induction current under the effect of the forming magnetic field; making the to-be-formed sample part generate temperature rise under the effect of the induction current; and meanwhile forming the to-be-formed sample part by virtue of electromagnetic force under thecombined action of the induction current and the forming magnetic field. The forming coil is a hollow coil; and the to-be-formed sample part and the conducting block are positioned inside the formingcoil. According to the formation method disclosed by the invention, the to-be-formed sample part and a mold are placed inside the forming coil, the electromagnetic field acting on the to-be-formed sample part and the mold is much larger than that at the outer side of the forming coil, so the forming force applied to the to-be-formed sample part is greatly increased, and the formation efficiency isgreatly improved.
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Description

technical field

[0001] The invention relates to the field of material forming and manufacturing, and more specifically, to a forming method and device based on an air-core coil. Background technique

[0002] Electromagnetic pulse forming technology is a new high-energy rate forming technology. Its principle is to pass a large pulse current into the forming coil, and an eddy current that resists the change of the magnetic field will be induced in the metal plate to be formed. Under the interaction between the magnetic field and the eddy current , the metal sheet to be formed is subjected to a huge electromagnetic force, thereby causing it to undergo plastic deformation. It has the advantages of increased forming limit and small springback. Therefore, it can overcome the difficult forming problems of high-strength and low-formability materials (such as titanium, aluminum, magnesium alloys, etc.), and promote its application in lightweight structures.

[0003] However, when th...

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Embodiment Construction

[0031] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

[0032] The present invention provides a forming device based on an air-core coil, the device sees Figure 1-Figure 3 As shown, it includes a sample to be formed 5, a forming coil 2, a mold 6, a conductive block 4, a blank holder 3, a coil reinforcement layer 1 and a power supply. The forming coil 2 , the forming coil reinforcement layer 1 and the power supply form an electromagnetic driver, the...