| Fiber Laser Cutting Machine | A fiber laser generates a concentrated light beam. The beam is focused through a cutting head, while an assist gas removes molten material through the nozzle. | Mild steel, stainless steel, aluminum, brass, copper, and galvanized sheet | Commonly used for thin and medium metal sheets; the practical range depends on laser power, material type, and required edge quality. | Oxygen, nitrogen, or compressed air | High precision, narrow kerf, fast processing of sheet metal, and good automation potential | Laser power, cutting-head quality, autofocus control, machine rigidity, assist-gas pressure, and nozzle alignment |
| CO₂ Laser Cutting Machine | A gas laser uses an electrically excited carbon-dioxide mixture to produce an infrared beam, which is focused onto the workpiece and supported by an assist gas. | Carbon steel, stainless steel, acrylic, wood, plastics, textiles, and other nonmetal materials, depending on configuration | Suitable for a broad range of thin and medium materials; the maximum thickness varies significantly with power and material. | Oxygen, nitrogen, air, or another application-specific assist gas | Flexible material compatibility, especially for some nonmetal applications | Operating cost, optical-path maintenance, material compatibility, cooling system, and extraction requirements |
| Plasma Cutting Machine | An electric arc ionizes compressed gas into plasma. The high-temperature plasma melts the metal, and the fast gas stream ejects the molten material through the cut. | Carbon steel, stainless steel, aluminum, and other electrically conductive metals | Often selected for medium to thick conductive metal; capacity depends on the plasma power source and torch design. | Compressed air, oxygen, nitrogen, or argon-hydrogen mixtures | High cutting speed on conductive metals and lower entry cost than many laser systems | Required edge quality, consumable life, torch height control, electrical capacity, and fume extraction |
| Oxy-Fuel Cutting Machine | A fuel gas preheats the steel, then a jet of oxygen reacts with the hot metal and removes the resulting iron oxide from the cut zone. | Primarily carbon steel and low-alloy steel; not generally suitable for stainless steel or aluminum | Well suited to thick carbon-steel plate, with capacity determined by torch, gas pressure, and machine configuration. | Oxygen combined with acetylene, propane, or another fuel gas | Effective for thick steel, relatively simple equipment, and suitability for large plate processing | Heat-affected zone, preheating time, gas safety, plate thickness, and required dimensional accuracy |
| Waterjet Cutting Machine | A high-pressure water stream, sometimes mixed with abrasive particles, erodes the material without creating a conventional heat-affected zone. | Metal, stone, glass, ceramics, composites, rubber, and many heat-sensitive materials | Can process thin to very thick materials; the actual limit depends on pump pressure, abrasive flow, and material properties. | High-pressure water; abrasive garnet is commonly used for hard materials | Cold cutting, low thermal distortion, and broad material compatibility | Water and abrasive consumption, pump maintenance, cutting speed, drainage, and operating cost |
| Nozzle Function | The nozzle directs and shapes the assist-gas stream around the laser beam or plasma arc. It helps remove molten material and influences cut stability. | Relevant to laser and plasma cutting systems | Not applicable as a thickness category; the correct nozzle depends on the cutting process and material thickness. | Oxygen, nitrogen, compressed air, or process-specific plasma gas | Stable gas flow, reduced spatter, improved edge quality, and more consistent piercing | Nozzle diameter, nozzle-to-workpiece distance, concentricity, cleanliness, wear, and gas pressure |
| Single-Layer Laser Nozzle | Uses one internal gas path to deliver the assist gas around the focused laser beam. | Commonly used for oxygen or nitrogen cutting when the process requires a straightforward gas flow path | Selected according to material, gas type, power level, and cutting parameters rather than thickness alone. | Oxygen, nitrogen, or compressed air | Simple structure, easy maintenance, and suitable gas-flow performance for many standard applications | Correct orifice size, gas-flow uniformity, beam-nozzle centering, and compatibility with the cutting head |
| Double-Layer Laser Nozzle | Uses separate inner and outer passages to support different gas-flow arrangements and process requirements. | Metal sheets and plates processed with laser cutting systems | Application-dependent; nozzle selection should follow the material, assist gas, focal position, and cutting parameters. | Oxygen, nitrogen, or compressed air, depending on the nozzle design | Can provide stable gas delivery for specific cutting and piercing conditions | Internal passage design, sealing condition, nozzle height, cleanliness, and correct gas-pressure setting |
| Best Selection Criteria | The best machine is determined by matching the cutting method to the material, thickness, tolerance, production volume, and operating environment. | Material type, reflectivity, electrical conductivity, heat sensitivity, and surface condition | Choose a machine with a rated capacity above the normal production thickness to maintain process stability. | Gas availability, purity, pressure, flow rate, and operating cost | For many sheet-metal applications, a properly configured fiber laser is a strong general-purpose option. | Compare accuracy, throughput, serviceability, consumable cost, safety systems, software, extraction, and total cost of ownership. |
| Nozzle Maintenance | Routine inspection keeps the nozzle orifice clean and concentric, allowing the assist gas and cutting beam or arc to remain properly aligned. | All laser and plasma cutting applications | Maintenance frequency depends on material, piercing frequency, spatter, and operating conditions. | The gas specified by the cutting process and material recipe | More stable piercing, fewer alarms, improved cut quality, and longer consumable life | Clean the tip, check for deformation, verify centering, inspect ceramic or insulation parts, and replace damaged nozzles. |