Introduction to Common Blanking Methods in Sheet Metal Processing
Blanking is one of the core operations in sheet metal processing: material is punched from a sheet or plate to create a flat part of a required outline. Because the shape of the cut and the edge condition it leaves behind depend on the machine used, understanding the main blanking methods is useful when specifying parts for laser cutting, welding or bending work.
1. Plate Shears
Plate shears are among the most widely used plate cutting machines across different industrial sectors. A plate shear works along a straight line, with the upper and lower blades meeting at a set angle to shear the material cleanly. They are closely related to linear cutting machines, which follow the same straight-line principle while removing material along a continuous cut path rather than shearing a fixed line at once.
2. Linear Cutting Machines
Linear cutting machines separate the workpiece along a defined line, working across the full width of the sheet. Because the cut follows a straight path, they suit long, repetitive profiles and high-volume runs where the same line geometry is needed part after part. The finish of the edge differs from a laser cut, and the equipment is generally matched to the material thickness and the tolerance of the job.
3. Punching and Press Tools
In punching, a shaped punch pushes a matching die through the sheet to form a hole or an outline. The tooling is defined by the part, so outlines and hole shapes follow the die geometry, and repeat orders use the same tool set.
4. Laser Cutting
Laser cutting melts and vaporises the material along a focused beam path, following the contour of the part. It suits intricate outlines and small features, and it suits short runs where programming a contour avoids the cost of dedicated tooling.
5. Profile and Shape Cutting
Profile cutting follows a defined outline for the part being produced, and it is often combined with secondary operations. A cut profile that leaves a clean edge will bend and weld more predictably, so the choice of cutting method is usually made together with the downstream fabrication steps.
Choosing a Method for Your Part
The practical decision comes down to material, thickness, outline complexity, quantity and the tolerance the finished part must hold. Parts that are then bent, welded or assembled into enclosures are commonly reviewed as a whole, so the cutting method, the edge condition and the follow-up work are considered at the same time.
Where This Fits Into Our Work
At ZHONGSHAN LAMBERT PRECISION HARDWARE CO., LTD. we build custom sheet metal parts around a combination of sheet metal fabrication, laser cutting, laser welding, sheet metal bending, tube bending, and frame and enclosure customisation. A drawing sent over for review is the fastest way to see which combination suits the part and the run quantity.
Send us your drawings for a fabrication review or read about precision aluminum laser cutting.