Medical device parts often require a cut edge that is smooth and square, with no fracture zone or die roll. Conventional stamping cannot achieve this because the material tears as it separates. Fine blanking solves the problem by applying a high clamping force around the cut line before the punch descends. The material is held under pressure so it shears cleanly instead of tearing.
The die uses a V-ring that presses into the sheet just outside the part contour. This ring creates a local compressive stress that prevents the material from flowing outward during cutting. At the same time, a counter-punch pushes up from below with a controlled force. The combination of clamping, counter-pressure and a small cutting clearance - typically 0.5% of material thickness - produces a cut surface that is 90% or more clean shear.
Fine blanking requires a special triple-action press, not a standard stamping press. If your facility does not have one, we can produce the parts at our factory and ship finished components to you. For buyers who do have fine blanking presses, we build the die to fit your press specifications and provide the clamping force and counter-force settings for your material grade. Every die is tested with a full strip layout report.
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