How Automated Lapping Works
At one time, the lapping process was a labor-intensive, manual procedure with a high margin for error. Today, Sunnen is the exclusive provider of automated bore lapping solutions. Sunnen’s patented machine uses a tool known as a lap, which resembles a honing mandrel but with grooves instead of abrasive stones. As the lap enters the bore it spreads a loose abrasive compound between the tool and the wall of the bore. As the tool rotates and reciprocates within the bore the abrasive compound removes excess material and creates a uniform surface finish. The machine periodically gauges the size of the bore and continues the lapping process until the bore is within specifications…all without operator intervention.
Automated Lapping Is Used To:
- Improve consistency of finished parts
- Reduce reliance on human operators
- Reduce potential for repetitive motion injuries associated with manual lapping
- Improve workplace safety by eliminating manual processing
- Tighten tolerances in bore diameter, roundness and straightness
Typical bore lapping applications include:
- Piston pumps and other aerospace parts
- Hydraulic valves and sleeves
- Thin-walled parts that are prone to distortion when honing
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