1.What are the core advantages of waterjet cutting of cold-rolled coils?
No Heat-Affected Zone:
This is the biggest advantage of waterjet cutting over laser and plasma cutting. Waterjet cutting is a purely cold-state cutting process, using ultra-high-pressure water (or a mixture of water and abrasives) for physical erosion, generating no heat.
Result: It does not alter the microstructure of the metal at the cut edge, and does not cause hardening, annealing, deformation, or thermal stress in cold-rolled coils. This is crucial for maintaining the original mechanical properties of cold-rolled steel (such as hardness and strength) and avoids surface oxidation or discoloration caused by heat.
High Cutting Quality, Achieving "Fine Cutting":
Smooth Cut: Especially when using abrasive waterjet cutting (abrasive water jet) to cut thicker plates, a smooth cut surface with high precision is obtained.
Burnt-Free or Minimal Burrs: Burrs at the cut edge are typically less than with plasma cutting, and for thin plates, the effect may approach that of laser cutting.
Capable of Cutting Arbitrarily Complex Shapes: Due to its non-contact cutting nature, extremely complex contours and sharp corners can be easily and quickly programmed for cutting, making it ideal for customized, small-batch production of precision parts.
2.What impact does cutting speed have?
For thin plates (e.g., below 6mm), laser cutting speeds are generally much faster than waterjet cutting.
For medium to thick plates, waterjet cutting speeds are competitive. However, its speed depends primarily on pressure and material thickness, and is relatively fixed.
3.What impact will this have on operating costs?
Major consumables: High-pressure system components (such as seals, high-pressure cylinders), abrasives (garnet sand, etc.), and sapphire nozzles in the waterjet cutting head. Abrasive cost is one of the main expenses for the continuous operation of a waterjet.
Energy consumption: Maintaining the ultra-high water pressure pump requires a large amount of electrical energy.
4.What are the effects of cutting at an angle?
The inherent characteristic of waterjet cutting is that the bottom of the cut is slightly wider than the top, creating a slight bevel. For parts requiring extremely high precision, it is necessary to use an automatic tilting cutting head or minimize the bevel by reducing the cutting speed and optimizing parameters. Modern high-end waterjet equipment can control this problem very well.
5.In what situations is waterjet cutting the preferred option?
Zero tolerance for heat deformation: Processed parts must not exhibit any changes in performance or dimensions due to heat.
Versatile material processing: In addition to cold-rolled steel, it can cut other metals and non-metals, making it a multi-purpose machine.
Complex shape processing: It can cut complex contours, small round holes, sharp corners, etc.
Precision machining of medium and heavy plates: Suitable for thick cold-rolled coils where high-quality cut surfaces are required.
Small-batch, high-value-added production: Ideal for aerospace, precision machinery, and high-end manufacturing industries.