The portable air-cooled laser tack welder is a light-duty tool designed for fit-up and tack welding operations: positioning two pieces of metal in contact before the main weld is applied, tacking thin sheet assemblies, and welding small components where the heat input and weld penetration of a conventional TIG process would be excessive.

Laser spot welding produces a narrow, low-heat-input tack that minimally distorts adjacent base metal — useful on thin-wall stainless components where conventional TIG tack welds can cause distortion that affects fit-up geometry for the subsequent orbital weld pass.

Boundary: what this tool does not do

This tool is not an orbital welding power source. It does not replace the FXT20 (closed-head orbital TIG for φ3.175–168mm tube) or the FXT40 Pro (open-head industrial orbital TIG for φ20–325mm process pipe). It does not produce girth welds qualified to ASME Section IX, API 1104, or any other structural welding code. If tack welds are incorporated into the final production joint, their acceptance depends on whether the project WPS permits laser tack welds within the groove — this must be confirmed before using the tool in a qualified welding procedure.

If tack welds made with this tool will be incorporated into a production girth weld that requires qualification under a welding procedure specification (WPS), the following must be confirmed before use:

• WPS tack weld acceptance: The project WPS must explicitly permit laser tack welds within the bevel groove. Many TIG pipe welding procedures prohibit tack welds from processes other than GTAW in the root area.
• Tack position: Even where tack welds are permitted, their position (within groove vs. on the pipe OD) and length are typically specified in the WPS. Follow the WPS requirements for tack location, length, and quality.
• Tack quality: Laser tack welds incorporated into the joint must be free of cracks and porosity. Inspect visually before the orbital weld is applied. Defective tacks must be completely removed by grinding before welding.
• Laser safety: Laser welding requires appropriate personal protective equipment (laser-rated safety glasses or goggles) and site safety controls per applicable laser safety regulations (IEC 60825-1 and local EHS rules).

便携式风冷激光点焊机是一款轻型工具，专为装配定位和点焊作业设计：在主焊接前将两块金属对准固定、薄板组件点焊固定，以及对小型零件进行焊接（传统TIG工艺热输入过大、熔深过深时使用）。

激光点焊产生窄小、低热输入的焊点，对相邻母材变形影响极小——对于薄壁不锈钢零件尤为有用，因为传统TIG点焊可能导致变形，影响后续轨道焊接道次的对口几何形状。

功能边界：本工具不能做什么

本工具不是轨道焊接电源。它不能替代FXT20（用于φ3.175–168mm管道的封闭焊头轨道TIG）或FXT40 Pro（用于φ20–325mm工业管道的开放焊头轨道TIG）。它不能产生符合ASME Section IX、API 1104或其他结构焊接标准的环缝焊接接头。若点焊被并入最终生产焊缝中，其可接受性取决于项目WPS是否允许在坡口内使用激光点焊——在将该工具用于合格焊接程序前，必须事先确认。

如果本工具所作的点焊将被并入需按焊接工艺规程（WPS）进行资质认证的生产环缝焊接中，使用前必须确认以下内容：

• WPS点焊许可：项目WPS须明确允许在坡口内使用激光点焊。许多TIG管道焊接程序禁止在根部区域使用GTAW以外工艺的点焊。
• 点焊位置：即便WPS允许点焊，其位置（坡口内或管道外径处）及长度通常在WPS中有明确规定。应遵守WPS对点焊位置、长度和质量的要求。
• 点焊质量：并入接头的激光点焊必须无裂纹和气孔。在施加轨道焊接前进行目视检查。有缺陷的点焊必须在焊接前通过打磨完全去除。
• 激光安全：激光焊接需配备适当的个人防护装备（激光防护等级安全眼镜或护目镜），并按适用的激光安全法规（IEC 60825-1及当地EHS规定）实施现场安全管控。