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VC Heat‑Pipe Spot‑Welding Process for Medium‑Frequency Spot‑Welder
Sep 08,2026
Heat pipes and vapor chambers are core heat‑dissipation components of equipment. Such heat pipes contain capillary heat‑dissipation structures and vacuum inner cavities, realizing uniform heat dissipation by vacuum phase‑change. Medium‑frequency spot‑welders feature stable heat output, controllable pressure and narrow heat‑affected zones, and represent mainstream process for heat‑pipe welding. Nevertheless, heat‑pipes have thin walls, hollow interiors without support and copper with high thermal conductivity. In production, defects such as nozzle collapse, pipe‑wall bulging, inner‑wall burning‑through, sealing‑end leakage and weak welding frequently occur.
I Process Difficulties of VC Heat‑Pipe Spot‑Welding
1.Thin‑walled hollow structure without internal support. The material is relatively soft. Deformation and collapse will happen once softened by heat or subjected to slight pressure, damaging inner heat‑dissipation structures and impairing heat‑dissipation performance.
2.Copper has high thermal conductivity and low heat‑storage capacity. A small amount of heat can penetrate thin walls, readily causing inner‑wall burning‑through and invisible micro‑holes which form hidden leakage risks.
3.High vacuum‑sealing requirements. Tiny pores, gaps or discontinuous fusion on weld spots will allow gradual air ingress, resulting in vacuum degradation and product rejection.
4.Slight over‑heating or squeeze deformation will cause permanent damage, making rework impossible.
II Core Advantages of Medium‑Frequency Spot‑Welding for Heat‑Pipe Welding
1.Stable and controllable heat without instantaneous thermal shock. Energy is released precisely in short time; heat concentrates only on outer welding layers and will not diffuse inward, avoiding inner‑wall burning‑through and pipe‑wall perforation.
2.Multi‑stage pressure adjustment available. It supports gentle leveling, pressure‑stabilized welding and pressure‑holding cooling. It can achieve sound compact welding and meanwhile prevent collapse caused by high‑pressure squeezing, solving the contradiction between deformation and cold joints.
3.Narrow heat‑affected zone. Inner capillary structures and phase‑change medium will not be damaged, and original heat‑dissipation performance of heat‑pipes is preserved.
4.Built‑in heat‑compensation function; no parameter drift in continuous production.
III Common Defects
1.Nozzle collapse and pipe‑wall bulging deformation
2.Micro‑leakage at sealing end and vacuum degradation
3.Inner‑wall burning‑through and invisible perforation
4.Cold joints and insufficient welding strength
IV Welding Process Solutions
1.Proper matching of welding parameters
2.Three‑stage flexible pressure control
3.Electrode selection and daily maintenance
4.Dedicated profile‑following supporting tooling
5.Strict pre‑welding cleaning control
6.Stabilize equipment heat dissipation to avoid batch deviation
Wuxi Haifei Intelligent Equipment Co., Ltd. https://www.haifeiwelder.com/
Wuxi Haifei Intelligent Equipment Co., Ltd. has been focusing on the R&D and production of spot‑welding machines for 17 years. The company has obtained ISO9001 Quality Management System Certification, China Compulsory Certification (3C) and CE Certification. It is a National High‑tech Enterprise, a Specialized, Refined, Differential and Innovative Enterprise of Jiangsu Province, a Specialized, Refined, Differential and Innovative Enterprise of Wuxi, and a Gazelle Enterprise in the Southern Jiangsu National Self‑Dependent Innovation Demonstration Zone.
Should you be interested in our spot‑welding machines, please contact us: 400‑0510‑750.
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Wuxi HAIFEI Intelligent Equipment Co., Ltd.
Wuxi HAIFEI Welding Equipment Co., Ltd.
Add: 28 Shuiyun Road, Yuecheng, Jiangyin, Jiangsu Province, China. (Postal Code: 214404)
Mobile: +86 18915302352
Email: wushijie@jshaifei.com