A new surface deburring and finishing cylinder hone has improved quality and cut costs in the honing of burrs created during the boring of cylinders in the manufacture of hermetic and semi-hermetic compressors. The system, according to a company spokesman, is the most cost effective means of performing the deburring operation.
Copeland Corporation, Sidney, OH, produces accessible and welded motor compressors and condensing units range in capacities from 1/4hp to 100hp. The bodies of the compressors are cast by outside vendors and shipped to Copeland’s plant.
According to Bruce Demers, manufacturing engineer at the company, Copeland maintains very rigid standards in cleaning and deburring the parts. This occurs, he says, because contaminants, such as cast iron dust, chips and burrs, loose in an assembled compressor can cause the unit to fail.
The cylinder hone deburring operation at Copeland is particularly critical since a burr is raised on each compressor’s head deck at the cylinder at the time the cylinder is bored. The compressors range from one cylinder up to nine in tandem units.
To find an efficient solution to its deburring problem, Copeland adopted an innovative deburring/finishing honing tool known as Flex-Hone. Manufactured by Brush Research Manufacturing Co., Inc., Los Angeles, CA, the tool consists of a flexible hone with abrasive laminated to the ends of high-density nylon filaments. At Copeland the cylinder hone is placed in a hand-held air tool and secured by a standard key chuck.
The compressor deburring at Copeland now works as follows: the castings arrive at the plant and are placed on one of three dial index machines, where all the machine dimensions on the body are created. The head deck is milled twice to the company’s micro-requirement of 125rms.