Shipbuilding is known as the “integrator of industrial technology”, and the processing accuracy of its core metal components directly affects the performance and construction cycle of ships. As the global shipbuilding industry accelerates its transformation towards large-scale and green, metal band saws are becoming the core equipment for upgrading shipyard cutting processes due to their high precision, low loss and intelligent characteristics.
Ⅰ.Application scenarios of metal band saws in shipbuilding
From 10,000-ton cargo ships to LNG carriers, metal band saws are irreplaceable in the following key links:
1.Hull structure processing
Marine steel plate cutting:It can efficiently process high-strength ship plates such as AH36/EH40, with a cutting thickness of up to 300mm and a cut verticality error of ≤0.15mm/m, directly meeting the welding standards of classification societies such as CCS and DNV.
Curved outer plate forming:Through CNC programming, complex curve cutting of hull outer plates (such as bulbous bow segmentation) is achieved, with an efficiency increase of 50% compared to traditional plasma cutting and a reduction of 90% in thermal deformation.
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2.Power system component manufacturing
Diesel engine crankshaft blank cutting: For alloy steel forgings such as 42CrMo4, the cold cutting process of the band saw machine avoids micro cracks in the heat affected zone, and the material loss rate is reduced from 8% to 1.2%.
Propulsion shaft processing:Jiangnan Shipyard uses a double-column band saw machine to complete the cutting of a single stern shaft with a length of 18 meters and a diameter of 800mm. The end surface roughness reaches Ra12.5μm, saving 32 hours of boring time.
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3.Pipe system and outfitting production
LNG ship stainless steel pipe cutting: For low-temperature materials such as 9% nickel steel and duplex stainless steel, the band saw machine is combined with special coolant to achieve stress-free cutting to avoid the risk of BOG (boil-off gas) leakage.
Marine valve batch processing: The automated band saw machine cluster realizes continuous cutting of DN200-DN500 valve body blanks, with a single-shift production capacity of more than 500 pieces and an accuracy error of ±0.2mm.
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Ⅱ.Technological advantages: From efficiency to compliance breakthroughs
Compared with the traditional shipbuilding cutting process, the metal band saw machine has achieved multi-dimensional upgrades:
| Dimensions | Metal band saw machine | Traditional process (flame/plasma cutting) |
| Cutting accuracy | Achieve IT8 level precision, no secondary processing | Thermal deformation requires correction, which takes 2-4 hours |
| Material utilization | The sawing seam is only 1.5-2mm, saving 5%-7% of materials | The sawing seam is 3-6mm, and expensive alloy steel is wasted significantly |
| Environmental compliance | No harmful gas, in line with IMO 2020 sulfur limit | Produces nitrogen oxides and metal vapor pollutants |
| Energy efficiency | Average energy consumption 15kW·h/ton, reduced by 65% | Plasma cutting reaches 45kW·h/ton |
Typical case: After Dalian Shipbuilding Industry Corporation introduced the intelligent band saw production line, the steel plate cutting cycle of a 200,000-ton bulk carrier project was shortened by 22 days, saving more than 1.2 million yuan in steel costs.
Metal band saws are redefining the metal processing paradigm of shipbuilding with “millimeter-level precision and ton-level efficiency”. From the hull sections of giant oil tankers to the precision piping of luxury cruise ships, this technology not only reduces construction costs, but also promotes the transformation of the shipbuilding industry towards high quality and low carbon.
Parameter reference:
| Technical Specifications| Model | CH-650 |
| Cutting capacity 0° (flat) (L*W) | 650*650 mm |
| Cutting capacity 0° (round) | 650 mm |
| Cutting capacity 0° (square) | 650*650 mm |
| Cutting speed infinitely variable | 20~65m/min(inverter) |
| Stop length(single stroke) | N/A |
| Accuracy of the feeding(single feeding) | ±0.2 mm |
| Saw blade size | 41×1.3×6860 mm |
| Saw blade tension type | Hydrualic |
| Workbench height | 560 mm |
| Motor rating main drive | 5.5 kw |
| Motor rating of hydraulic feed | 1.5 kw |
| Overall dimensions (L*W*H) | 3270x1640x2160 mm |
| Weight(NET WEIGHT) | 3230kg |
If you are also in the field of metal shipbuilding, need to process complex special-shaped components or need to handle high-strength materials, and are looking for a suitable metal band saw, please contact Shanghai ANTISHICNC. We are an experienced band saw equipment supplier with rich experience in mechanical equipment manufacturing and application, and can provide you with professional technical support.
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