Eliminating surface finish variations in grinding
- May 26, 2013
Magnetic filtration solves fine grinding swarf issue at Linamar plant
When driveline and engine component manufacturer Traxle, Guelph, ON, part of Linamar Industries, started to experience surface finish problems during a final valve sealing ring grinding operation, it turned to a magnetic filtration system, the Micromag MM5 supplied by Eclipse Tools North America, Stoney Creek, ON.
The Micromag MM5 system
Traxle uses a lapping machine to apply the final grinding operation to a valve sealing ring. Parts are manufacturer to precise tolerances. Before it installed the Micromag MM5 system, the company used barrier filter bags with a filtration capability of 20 microns. During grinding, very fine grinding swarf was passing through the paper filters and being recirculated, causing variations in surface finish which lead to product rejects. The coolant had to be changed regularly because of excessive ferrous contamination. Finer barrier filters were tested, but they became blocked very quickly, restricting the flow.
Traxle turned to the Micromag MM5. The filtration system has a low flow rate, and while it requires cleaning weekly, it has improved the consistency of surface finish and reduced reject rates, reports Traxle. Coolant lifespan has also increased because sub-micron ferrous particles are removed from the process. A new cleaning tool was also developed to aid in the cleaning process.