In steel furniture manufacturing plants, guardrail posts, and lightweight tube processing workshops across Southeast Asia, the application of thin-wall tubes (typically referring to metal tubes with wall thicknesses under 1 mm) is exceptionally high. However, many technicians operating laser tube cutting machines frequently encounter a stubborn quality bottleneck: thin-wall tubes are highly susceptible to cut-edge collapse, edge deformation, or localized softening during cutting. This not only results in excessive assembly gaps but also directly compromises the overall structural strength of the finished products.

I. Why Do Thin-Wall Tubes Easily Suffer from Collapse and Deformation?

To fundamentally overcome this processing challenge, one must understand the thermodynamic characteristics of thin-wall tubes:

• Thermal Input Over-Saturation and Material Softening: Because thin-wall tubes possess extremely thin walls and poor heat storage capacity, the massive amount of heat generated by traditional continuous laser cutting cannot be conducted and dissipated in a timely manner. This causes the localized temperature at the cut edge to rapidly exceed the melting point, softening the material.

• Imbalanced Auxiliary Gas Blow-Out Pressure: Conventional gas pressures fail to provide adequate cooling and slag stripping capabilities under transient high temperatures, making the cut edges prone to inward collapse while the material remains in a plastic state.

II. Core Process Solutions: Pulse Cutting Modes and High-Pressure Nitrogen Cooling

To completely eliminate deformation defects in thin-wall tubes, operators must abandon the conventional mindset of full-power continuous cutting and adopt refined pulse control alongside high-pressure cooling strategies:

1. Enabling Precise Pulse Cutting Parameters: Switch the laser output mode from continuous to pulse cutting. By meticulously configuring pulse widths (0.1–0.5 ms) and frequencies (1000–3000 Hz), the laser delivers high-frequency intermittent output, providing the molten pool with intermittent cooling intervals and drastically reducing thermal input at the source.

2. Pairing with High-Pressure Nitrogen for Rapid Cooling: Concurrent with pulse output, 12–18 bar high-pressure nitrogen must be introduced for rapid purging and temperature reduction. The high-pressure airflow not only instantly evacuates trace amounts of slag but also establishes highly effective physical cooling and shaping of the cut edges.

III. Technical Implementation and Auxiliary Support Standards for Stable Production

Beyond optimizing pulse and gas pressure parameters on the software side, workshops must execute the following auxiliary support details during actual production:

• Internal and External Auxiliary Support: During batch processing of ultra-thin tubes (such as pipe fittings with wall thicknesses approaching or below 0.8 mm), dedicated internal auxiliary support liners made of aluminum or nylon can be added inside the chuck clamping zone when necessary to prevent inner wall indentation caused by instantaneous gas pressure impacts.

• Routine Inspection of Optical Lenses and Nozzles: Thin-wall tube cutting demands exceptionally high energy density from the focused light spot. Prior to daily startup, foreign debris inside the nozzle orifice must be carefully cleared to ensure 100% vertical focus of the pulse laser energy output, preventing localized thermal distortion caused by minor nozzle residue deflecting the gas flow.

By implementing this combined methodology of "pulse cutting for heat reduction combined with high-pressure nitrogen rapid cooling," steel furniture and lightweight tube manufacturing enterprises in Southeast Asia can thoroughly resolve the persistent ailment of thin-wall tube collapse and deformation, significantly elevating batch product dimensional yield rates.