Forging + CNC Machining Service
Parts for Suspension & Structural Control Linkages. Functions as an end fitting for heavy-duty tie rods, sway bars, or structural tension linkages, providing an adjustable threaded connection that pivots on a single axis.
Parts for Internal Fluid Channels & Oil Passages. The curved grooves, ports, and internal webs direct refrigerant/oil flow and maintain pressure seals across the compression chambers.
Various parts for different uses, Forged and CNC machined finished.
Our Forging + CNC Machining Process.
1. Primary Forging Phase (Near-Net Shape Formation)
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Process: Metal stock (billet or bar) is heated past its recrystallization temperature (hot forging) or formed under extreme pressure (warm/cold forging) using hydraulic or mechanical presses into a near-net shape die.
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Microstructure & Grain Flow: Compressive forces refine the internal grain structure, aligning continuous grain flow along the geometry of the part. This eliminates internal voids, gas pockets, and porosity.
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Mechanical Characteristics: High impact toughness, fatigue resistance, and superior tensile strength compared to bar-stock-only machining or casting.
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As-Forged Tolerances: Typical dimensional tolerances range from ±0.5 mm to ±1.5 mm, with an average surface roughness ($Ra$) of 3.2 µm to 12.5 µm. A designated machining allowance (stock overlay of 1.5–3.0 mm) is retained on functional surfaces.
2. Post-Forging Preparation & Thermal Processing
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Trimming & Flash Removal: Excess material squeezed out along the die parting line (flash) is mechanically trimmed or sheared off.
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Heat Treatment (Optional/Application-Specific): Normalizing, annealing, or quench-and-temper cycles are applied to relieve internal residual stresses from plastic deformation and optimize hardness prior to cutting.
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Descaling: Mechanical shot blasting or chemical pickling removes iron oxide scale generated during hot forging, protecting CNC tooling from premature abrasive wear.
3. Precision CNC Machining & Finishing Phase
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Setup & Datum Strategy: The forged blank is located in custom fixtures using designated non-critical forged features as datum targets to account for forging draft angles (typically 3° to 7°).
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Rough Machining: CNC turning, milling, or 5-axis indexing removes excess forging stock allowance down to within 0.3–0.5 mm of final geometry.
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Finish Machining & Micro-Finishing: Fine-pass CNC operations establish critical engineering features:
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Precision Features: Bearing journals, threaded holes, seal seats, mating flanges, and strict GD&T tolerances (concentricity, position, perpendicularity).
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Dimensional Accuracy: Achieves tight manufacturing tolerances down to ±0.005 mm to ±0.012 mm.
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Surface Roughness ($Ra$): Achieves smooth finish profiles ranging from (Ra) 0.4 µm to 1.6 µm (or finer via subsequent grinding/lapping where required).
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Specifications
| Process Summary | ||
|---|---|---|
| Metric / Feature | As-Forged Blank | Post-Machined Forging |
| Primary Strength Driver | Continuous grain flow & high density | Retained grain structure in load-bearing core |
| Dimensional Tolerance | ±0.5 mm to ±1.5 mm | Down to ±0.005 mm |
| Surface Finish (Ra) | 3.2 µm – 12.5 µm | 0.4 µm – 1.6 µm |
| Critical Features | Broad geometry, draft angles present | Precision bores, threads, flat mating faces |
| Ideal Applications | General structural frames, non-mating links | Engine crankshafts, connecting rods, high-pressure valves |