A method for electromagnetic shaping of high-strength alloys
By using the electromagnetic forming method for high-strength alloys, a transient high-strength magnetic field generated by pulsed current is used to eliminate residual stress, thus solving the problem of residual stress after bulging of high-strength alloy pipe fittings and achieving high-precision forming effect.
CN121911768BActive Publication Date: 2026-05-26HUAZHONG UNIV OF SCI & TECH
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Patent Information
- Application Number
- CN202610385458.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2026-03-27
- Publication Date
- 2026-05-26
- Estimated Expiration
- 2046-03-27
AI Technical Summary
Technical Problem
The residual stress in existing high-strength alloy pipe fittings cannot be eliminated after bulging, resulting in a significant shrinkage in the pipe fitting diameter and a large error from the target size.
Method used
The high-strength alloy electromagnetic straightening method is adopted. The pipe is fixed by a positioning mechanism. After the hydraulic press expands the pipe, a pulse current is applied to generate a transient high-strength magnetic field. The induced eddy current interacts with the external magnetic field to eliminate residual stress.
Benefits of technology
It significantly reduces pipe diameter shrinkage, improves forming accuracy, reduces errors, and makes dimensions closer to the target.
✦ Generated by Eureka AI based on patent content.
Abstract
This invention discloses an electromagnetic shaping method for high-strength alloys, relating to the field of metal forming and manufacturing technology. The shaping method includes the following steps: fixing a base below a hydraulic press; fixing the high-strength alloy tube to be shaped on the outside of a positioning column structure; installing a shaping coil on the base and surrounding the high-strength alloy tube, connecting the shaping coil to a pulse power supply; controlling the hydraulic press to press down on the positioning column structure, which drives the high-strength alloy tube to expand and enter the plastic deformation stage; controlling the pulse power supply to discharge to the shaping coil, which generates a pulse current and forms a transient high-strength magnetic field, inducing eddy currents on the surface of the high-strength alloy tube. The eddy currents interact with the external magnetic field added by the shaping coil, generating a high-amplitude electromagnetic force that is initially concentrated on the outer surface of the high-strength alloy tube and diffuses towards the interior of the tube's wall thickness, completing the electromagnetic shaping. After disassembly, the high-strength alloy tube is closer to the target roundness dimension.
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