304 Stainless Steel Pipe Laser Cutting Through-Hole Thread Base Cnc Milling
304 Stainless Steel Pipe Laser Cutting Through-Hole Thread Base Cnc Milling
Product Description
Laser-Cut 304 Stainless Steel Tubing with Through-Holes, Threaded Base, and CNC Milled Features is an integrated, precision-manufactured structural and fluidic component. This part starts as standard 304 stainless steel tubing, which is then transformed using a combination of advanced processes: laser cutting creates precise through-holes or patterns in the tube wall; a solid threaded base (flange or connector) is either integrated via machining or welded on; and final critical dimensions, mounting features, or complex geometries are achieved through精密CNC milling. This multi-process approach results in a robust, ready-to-install component that combines the lightweight strength of tubular construction with the functionality of integrated mounting, porting, and connection capabilities.
Product Processing
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Material Preparation & Primary Laser Cutting: 304 stainless steel tubing is cut to length. A CNC fiber laser cutter with rotary axis then cuts the specified through-holes, slots, or ventilation patterns around the tube's circumference. This step establishes the primary fluid/gas ports or structural cutouts.
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Base Attachment & Preparation:
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Option A (Integrated): A solid rod of 304 stainless is welded (TIG or laser) to one end of the tube to form a blank for the base.
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Option B (Pre-fabricated): A pre-machined flange or threaded fitting is aligned and welded to the tube end.
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Stress Relief (Optional but Recommended): After welding, the assembly undergoes a stress relief annealing cycle to minimize internal stresses that could cause distortion during subsequent精密machining.
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CNC Milling of the Base & Critical Features: The welded assembly is fixtured in a multi-axis CNC milling machine. Key operations include:
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Facing & Squaring: Creating a perfectly flat and perpendicular mounting surface on the base.
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Thread Milling: Cutting precise internal or external threads (e.g., NPT, BSPP, UNF) into the base for secure connections.
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Bolt Hole Circle (BHC) Drilling/Tapping: Machining a pattern of mounting holes in the base flange.
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Precision Boring/Finishing: Sizing and finishing the inner diameter of the tube at critical interface points or the base port.
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Deburring, Cleaning & Surface Finishing: All laser-cut and milled edges are deburred. The entire assembly is cleaned. A final surface treatment is applied, such as passivation for corrosion resistance or electropolishing for a clean, smooth finish.
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Final Inspection & Testing: The component is inspected for hole pattern accuracy, thread fit (go/no-go gauges), flatness of the base, and overall dimensions. Pressure testing or leak testing can be performed if it is a fluid containment part.
Product Applications
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Fluid & Pneumatic Manifolds: Custom distribution blocks where the tube acts as a common rail with laser-cut ports for branch connections, and the milled base provides the main inlet/outlet with threaded ports.
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Machinery Guards & Enclosures: Ventilated tubular frames or handles where laser-cut holes provide airflow/lightweighting, and a milled threaded base allows for secure mounting to a machine body.
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Sensor Mounting Assemblies: A tube with laser-cut slots for cable egress and a milled, threaded base for screwing directly into a process line or vessel for sensor installation.
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Architectural & Furniture Fittings: Structural posts with decorative laser-cut patterns and a precision-milled, threaded base for secure floor or ceiling mounting.
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Automotive & Aerospace: Lightweight bracketry or ducting where the tube provides structure, holes are for weight reduction or ancillary attachments, and a milled flange allows for bolted assembly.
Product Technical Parameters (Detailed Table)
| Category | Parameter | Specification / Details |
|---|---|---|
| Material | Tubing & Base Material | 304 Stainless Steel (AISI 304, UNS S30400). Consistency ensures optimal weld integrity. |
| Base Tubing | Tubing OD | 12 mm to 150 mm |
| Tubing Wall Thickness | 1.0 mm to 6.0 mm | |
| Tubing Length | Up to 2000 mm (pre-machining) | |
| Laser Cutting | Process | CNC Fiber Laser with Rotary Axis. |
| Through-Hole Diameter (Min) | ~1.0 mm or 1x Wall Thickness (whichever is larger). | |
| Hole/Pattern Position Tolerance | ± 0.15 mm | |
| Edge Condition (As-cut) | Smooth, minimal dross. Slight taper possible. | |
| Base & Milling Features | Base Type | Flange, Hex, or Round with threaded center. |
| Thread Types | NPT (1/8" to 1"), BSPP (G1/8 to G1), UNF/UNC (e.g., 1/4-20), Metric (e.g., M8x1.25). | |
| Flange Thickness | 6 mm to 25 mm. | |
| Bolt Hole Circle (BHC) Diameter | As per design, tolerance ±0.1 mm on hole position. | |
| Machining Tolerances (Base) | Flatness: ≤ 0.05 mm per 100 mm. Thread fit: Class 2B/2A or 3B/3A. | |
| Welding (If Applicable) | Weld Type | Full-Penetration TIG Weld or Laser Weld for high integrity. |
| Weld Finish | Ground flush or as-welded per specification. | |
| Dimensional Tolerances (Final Assembly) | Overall Length | ± 0.5 mm to ± 1.0 mm |
| Perpendicularity (Tube to Base Face) | ≤ 0.1 mm per 25 mm | |
| Concentricity (Tube OD to Base Feature) | ≤ 0.2 mm TIR | |
| Surface & Finish | Standard Finish | Passivated per ASTM A967. Weld area pickled and passivated. |
| Optional Finishes | Electropolished (full assembly), Bead Blasted, Polished. | |
| Quality Assurance | Inspection | Visual, dimensional (calipers, thread gauges, CMM for first article), weld inspection (VT/PT if required). |
| Testing (Optional) | Hydrostatic pressure test, pneumatic leak test. | |
| Material Certification | Mill Test Certificate (MTC) per EN 10204 3.1 for raw material. |
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