Microwave welding method and welding device

By combining a three-dimensional movable antenna array with carbon nanotube absorbing materials, precise local welding of large or complex workpieces is achieved, solving the problems of uneven heating and low energy utilization efficiency in traditional microwave welding, and improving welding quality and control precision.

CN121491589APending Publication Date: 2026-02-10SICHUAN UNIV
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Patent Information

Application Number
CN202511958438.5
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-12-24
Publication Date
2026-02-10

AI Technical Summary

Technical Problem

Traditional microwave welding technology suffers from poor adaptability to large or complex-shaped workpieces, uneven heating, low energy utilization efficiency, and unstable welding quality.

Method used

Employing a three-dimensional movable antenna array welding module and carbon nanotube absorbing material, the system achieves precise local welding of large or complex workpieces by adjusting the antenna position and microwave power. It utilizes dielectric and ohmic losses to convert microwave energy into heat energy, and combines this with a temperature control system for precise temperature control.

Benefits of technology

It enables precise local welding of large-sized or complex curved workpieces, improves welding uniformity and energy utilization efficiency, avoids material deformation and welding instability, and improves welding quality and control precision.

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Abstract

The invention discloses a microwave welding method and a welding device, and relates to the technical field of microwave welding, the welding method comprises the following steps: coating a wave absorbing material on a welding area of two plates needing to be welded, and placing the two plates on a substrate of a workbench; the running direction and speed of the three-dimensional moving frame are planned according to the shape needing to be welded; the antenna array welding module is connected with a microwave source to start welding; the microwave power is adjusted according to the temperature and the welding condition of the two plates, so that the areas, with the wave-absorbing materials, of the two plates are heated to a molten state, and welding is completed; and the microwave source and the workbench are closed, and the two welded plates are taken out. The device is reasonable in design, welding of large-size and complex-structure workpieces is achieved through microwave radiation of the antenna array welding module, the energy focusing place can be changed by moving the position of the antenna array welding module, and local directional welding of the large-size workpieces is achieved.
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