· KAIPU Engineering · glossary · 1 min read
undefined — Industry Glossary Entry
Definition of wire edge in industrial cutting: a thin, fragile burr on the very tip of the edge caused by a re-grind with too fine a wheel or no spark-out.
undefined is a thin, fragile burr on the very tip of the cutting edge, typically 1–5 µm thick and 0.5–1 mm long, caused by a re-grind that did not include spark-out passes. A wire edge peels off in the first 50–100 cuts and is mistaken for “the knife is dull” or “the steel is wrong”.
How to detect
- Visual under 10×: a bright thin lip on the back face at the very tip
- Touch the edge against a glass slide: the wire edge catches and bends
- Microscope at 50×: clearly visible as a thin flap
Fixes
- Re-grind with 2–3 spark-out passes at the final infeed
- Use a softer-bond grinding wheel (the wheel should “dress” the edge, not load)
- Replace the wheel if it is glazed or loaded
- Use a felt wheel with 1 µm diamond paste for the final pass on a precision slitter
See also: Hone (micro-hone), Burr, Maintenance: how to extend slitter life.