Production Machining - Your access to the precision machining industrial buyer.
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?????? Cleaning Tight Cleaning Specs productionmachining.com :: 49 e Midi is a versatile, aqueous single-chamber rotational cleaning system that features ultrasonic flood wash and rinse, immersion wash and rinse, spray wash and rinse, hot air dry, and vacuum dry to eviscerate any retained water in small blind holes of components with more complex geometries. Stewart's family of cast iron bearing housings did have blind holes, so a vacuum dry function would be an important part of an effective cleaning process. As consideration of the Midi continued, however, Stewart's business with its customers continued to expand. In the end, because of this additional business, Stewart decided to purchase a MecWash Maxi. e Maxi retains all of the performance of the Midi, but is constructed with a much larger cleaning chamber that measures 24-inch height by 24-inch width by 40-inch length. is larger Increasing Demands e manufacturing and quality engineers at Stewart Manufacturing, a Hermansville, Michigan, machining house, found themselves in this situation recently when one of its best customers increased the cleanliness requirements for a family of cast iron turbo bearing housings that Stewart manufactures. e tighter cleanliness specifications meant that particles of more than 500 microns were no longer acceptable, gravimetric weight gain would be restricted to 25 milligrams, and no amount of abrasive material—in this case residual honing grit—would be allowed at all. Before the customer made these changes to its cleanli- ness requirements, Stewart would clean the turbo bearing housings (after they were honed) using a 15-minute cleaning cycle inside a spray cabinet washer. However, this cycle time was inexact because often the spray washer did not successfully clean the parts in a single cycle. us, the bearing housings were often rewashed in a second 15-minute process. Recognizing that it frequently took two wash cycles to clean these housings in their spray cabinet, and they were now faced with much more stringent cleanliness requirements, the engineers at Stewart understood that they would need to make a change to a high-performance cleaning system. ey felt it would need to be able to flood every drilled passage of the various housings multiple times during a cleaning cycle and engage powerful ultra- sonics to evacuate cast iron filings and all grit retained in the bearing housings after the honing process. A New System Stewart quickly began its search for a new cleaning system. "When an important customer is pleased enough with your finished product to give you increasingly more business, you don't hesitate to dedicate the resources necessary to create a winning situation for both parties," says Randy McLeod, Stewart's vice president of manufacturing. Fortunately, they didn't have to look far for a suitable system, checking first with the customer itself. "As for the more rigorous cleanliness standards, our belief was that our customer was probably achieving them inside their own manufacturing operations, so we inquired with our contacts there." Pleased with its own 2012 purchase of a MecWash Systems aqueous parts cleaning system, the customer suggested that Stewart research this line of parts washing equipment. Initially, Stewart believed a MecWash Midi would achieve its cleaning throughput and cleanliness requirements. :: To accommodate varying part sizes, four different fix- tures are used to hold the bearing housings in place during rotation throughout the cleaning cycle.