How should clogging of grinding wheels be addressed?

Grinding wheel clogging is a common issue in grinding operations, often caused by swarf adhering to the gaps between abrasive grains or the bonding agent surface. If not addressed promptly, it reduces grinding efficiency and compromises machining accuracy. The remedy depends on the severity of clogging:

For minor clogging, targeted measures during grinding can alleviate the issue. These include appropriately increasing feed rate and grinding pressure to enable sharper abrasive penetration into the workpiece, thereby scraping off adhered swarf. Alternatively, using a grinding wheel with coarser grit is effective, as larger abrasive gaps in coarse-grit wheels resist clogging better.

For severe clogging, machine downtime is required for dressing using specialized tools. The most common tool is a grinding wheel dresser, which uses a diamond-tipped stylus to uniformly scrape the wheel surface. This removes clogged swarf and dulled abrasive layers, restoring the wheel's sharpness and surface flatness. During dressing, apply even pressure to prevent localized over-dressing that could cause the wheel to lose its roundness.

If the grinding wheel is severely clogged and regrinding fails to restore grinding performance, or if surface hardening or delamination occurs, discontinue regrinding and replace the wheel immediately to prevent compromising machining quality and operational safety.

Additionally, when grinding highly adhesive metals (such as stainless steel), use specialized grinding wheels with anti-clogging properties. Apply appropriate cooling fluid during grinding to reduce adhesion between swarf and the wheel.