HARPER "BRUSHING" SYSTEMS

• Functional Brushing is used primarily for functional finishing to improve product performance. Deburring and removal of surface contaminants from metal, plastic and rubber components are all ideal applications for Harper brushing systems.
• Effective Why brush? The payoff is longer product life through better fitting and operating parts, increased wear life, better fatigue resistance and improved corrosion resistance.
• Resilient Brushing utilizes wheel-mounted filament brushes, fibrous strands and composite wheels. Brushing has the ability to reach internal recesses, comers and sharp geometries of intricate components.

PROBLEM: Radiusing dead sharp edges
SOLUTION: On a continuous rotary machine equipped with silicon carbide nylon wheels, a uniform radius is applied to all cutting edges, both top and bottom. A super finish is also applied to the chip breaker area, ensuring uniform chip breaking, even with exotic metals. Production rates of over 500 parts per hour are achieved.

PROBLEM: Removal of excessive burrs
SOLUTION: At a rate of 160 pieces per hour, three brushing heads equipped with mono-filament brushes deburr the helical hob spline prior to assembly. An automatic pick and place unit transfers the part to and from the automated finishing cell. The system includes dry floor guarding and coolant filtration.

PROBLEM: Uniform radius on fir tree area
SOLUTION: Brushing with a silicon carbide impregnated nylon brush generates a uniform edge radius, removing all stress risers and machining marks on the fir tree area of the blade.

PROBLEM: Surface Conditioning
SOLUTION: An over/under indexing conveyor presents the cam shafts to two finishing heads.  A slight edge break is developed on all cam lobes and an overall surface finish better than 12 RA is attained. The second head also establishes a directional finish to the bearing journal, ensuring oil retention.