In modern heavy fabrication, structural engineering, and modular steel assembly, conventional straight-angle tube cuts are no longer sufficient. Achieving high-integrity welded joints requires precise weld-prep bevels—a process that has historically bottlenecked shop floors through manual grinding, milling, and multi-stage handling.
When a leading South Korean tube fabrication specialist sought to automate complex weld preparation on 50x70mm rectangular tubing, they integrated the LONX LASER LX-T24 series. Here is how adopting advanced fiber laser bevel cutting machine technology transformed their throughput, eliminated secondary edge preparation, and cut joint assembly time by over 50%.
Customer Location: Gyeonggi-do Industrial Corridor, South Korea
Sector: Metal Tube Processing & Structural Steel Fabrication
Equipment Deployed: LONX LASER LX-T24 Heavy-Duty Tube Laser Series with Dynamic 3D Beveling
Primary Workpiece: 50x70mm Structural Rectangular Steel Tubing (Wall Thickness: 2.5mm – 5.0mm)
Downstream Application: Welded structural frames for industrial machinery platforms and modular architectural steel frameworks
Before adopting high-precision laser beveling, the client relied on conventional bandsaws and cold saws for initial cutting, followed by manual beveling using hand-held angle grinders and edge-milling cutters.
Processing asymmetrical rectangular cross-sections like 50x70mm presented three persistent operational challenges:
Inconsistent Bevel Angles: Manual edge preparation introduced angular variations between ±3° and ±5° across long runs. These inconsistencies caused erratic root openings during robotic welding, driving up rework rates.
Multiple Handling Stations: Processing a single batch of tubes required cutting, crane transport, deburring, and manual grinding across four separate workstations, inflating work-in-progress (WIP) cycle times.
Severe Corner Distortion on Rectangular Profiles: When grinding bevels along the 50mm side versus the 70mm side, uneven heat and manual pressure frequently degraded edge squareness, compromising the fit-up of joint intersections.
The South Korean manufacturer integrated the LX-T24 tube cutting system, equipped with LONX LASER’s multi-axis 3D dynamic beveling head. Engineered for precise geometric cuts on both symmetrical and asymmetrical profiles, the LX-T24 handles raw tube loading, hole cutouts, miter cuts, and multi-angle weld preps in a single CNC cycle.
The five-axis cutting head of the LX-T24 delivers continuous bevel articulation up to ±45°. When cutting 50x70mm rectangular tubes, the machine automatically transitions between straight cutoffs and precision bevel faces along the corner radii, producing uniform V-groove weld preparations ready for immediate submerged arc or robotic MIG welding.
Rectangular tubes experience varying thermal absorption between flat walls and extruded corner radiuses. The LX-T24's intelligent CNC system modulates laser power, pulse frequency, and gas pressure on the fly, preventing burnouts on the 50x70mm profiles while maintaining clean, slag-free bottom edges.
Rather than merely duplicating manual weld bevels, the South Korean engineering team used the LX-T24 to introduce self-locating mortise-and-tenon joints directly into the beveled pipe ends. This eliminated custom alignment jigs during final frame tacking.
After commissioning the LX-T24 in their South Korean facility, the fabricator realized immediate operational gains:
Eliminated Secondary Grinding: 100% of post-cut edge milling and grinding operations were eliminated; cut components transition directly to the welding bay.
Welding Fit-Up Speed: Frame assembly times dropped by 55% due to consistent root faces and exact bevel tolerances.
Throughput Increase: Total processing capacity for 50x70mm structural tubing rose by 3.2x compared to mechanical sawing and manual prep.
Weld Seam Quality: Robotic weld passes achieved a 99.4% first-time pass rate on radiographic non-destructive testing (NDT), down from an 8.2% repair rate.
For metal fabricators in structural steel, industrial machinery, and automotive chassis construction, a high-performance fiber laser bevel cutting machine turns standard tube cutting into a high-margin competitive advantage.
The LONX LASER LX-T24 delivers the structural rigidity, multi-axis precision, and intelligent thermal management needed to process demanding rectangular profiles like 50x70mm steel tubing with zero thermal distortion and flawless weld preps.
Product Features:
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1.Side-mounted bed structure for easier loading 2.Maximum single tube load: 400kg 3.Linear weight: ≤33kg/m | 1.Equipped with full-stroke precision square/round tube chuck system 2.Wide cutting range: round tube ∅15-230mm; square tube □15*15-230*230mm | 1.Suitable for carbon steel, stainless steel, and aluminum 2.Cuts round/square tubes, channel steel, angle steel, and I-beams | 1.Movable chuck system for zero-tail cutting 2.Bevel cutting ±45° |
