A high performance electromagnetic pulse tube component welding process

By introducing an intermediate layer and a high-conductivity drive tube into electromagnetic pulse welding, combined with intense plastic deformation, material and size limitations have been overcome, enabling high-performance welding of multi-attribute material combinations and small-sized pipe fittings, thus expanding the application range of electromagnetic pulse welding.

CN122165010APending Publication Date: 2026-06-09HEFEI UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HEFEI UNIV OF TECH
Filing Date
2026-04-27
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

Electromagnetic pulse welding technology has limitations in terms of material adaptability and size applicability, making it difficult to achieve high-performance welding of multi-attribute material combinations and small-sized pipe fittings.

Method used

By employing an intermediate layer and a high-conductivity drive tube design, electromagnetic pulse welding of low-conductivity and small-gap tubes is achieved through a magnet collector and drive unit, combined with intense plastic deformation to form a solid metallurgical bond.

Benefits of technology

It expands the application scope of electromagnetic pulse welding, realizes reliable connection of dissimilar or high-performance metals, improves welding effect and efficiency, and is applicable to fields such as automobile manufacturing, aerospace, and new energy equipment.

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Abstract

This invention discloses a high-performance electromagnetic pulse (EMP) welding process for tubular components, comprising the following steps: configuring a corresponding intermediate layer and drive tube according to the welding process requirements of the target weldment; sequentially assembling the inner tube, intermediate layer, and outer tube; sequentially assembling the drive tube, magnet collector, and electromagnetic generating coil; setting the charging voltage and energy storage level of the pulse capacitor; charging the pulse capacitor bank in the charging circuit to a preset voltage; rapidly discharging the high-voltage electrical energy stored in the capacitor bank to the electromagnetic generating coil to generate a transient strong magnetic field; a huge Lorentz force is induced inside the drive tube, propelling the outer tube to violently impact inward at extremely high speed. This invention can achieve high-performance electromagnetic pulse welding of multi-property material combinations and multi-size tubular components; through the design of the magnet collector and drive unit, it achieves electromagnetic pulse welding of low-conductivity, small-gap tubular components; and innovatively proposes the concept of an intermediate layer, thereby realizing the welding of dissimilar or high-performance, difficult-to-join metals.
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