 |
 |
Consistent Results
In achieving a consistent finish, precise wheel pressure against the part is an integral component of the process. Using adjustable single-plane wheel wear compensation, Harper's smart machines automatically maintain constant pressure as the wheel diameter decreases.
|
Flexible
With its flexing and enveloping characteristics, mush buffing allows the wheel to follow edges and surfaces of complex parts-deburring, refining, and radiusing as it goes.
Problem |
Inconsistent finish, high scrap rate |
Solution |
A 72-inch diameter indexing rotary table with seven power-driven work spindles and four buffing heads improved consistency and significantly lowered the scrap rate on 10 different pieces. The uniform surface is generated in preparation for the application of a non-reflective coating. |
Problem |
Eliminating patchwork finish |
Solution |
A PLC controlled buff head traverses the length of the pure aluminum pressure bonded surface. A high finish is achieved with a maximum material removal of fewer than 0.0007 inches. The high finish eliminates painting, lowers maintenance, reduces aircraft weight, and eliminates the patchwork type pattern associated with hand finishing. |
Problem |
Application of a uniform finish |
Solution |
Quick change rotating fixtures and PLC controlled compound application ensure a consistent, uniform finish. Two twelve-foot buffing heads maintain a production rate of 90 parts per hour. Several hand finishing operations are eliminated before clear coating or silver plating. |
Problem |
Achieving high finish |
Solution |
Three cut/color heads and one high-color head are used to achieve an RA finish of less than one micron. The process produces an entirely uniform surface, geometrically sound, with no pullout of the metal surface. There is no change in the metallurgical or physical characteristics of the metal. |
Problem |
Creating uniform radius in portholes |
Solution |
Using a combination of buffing heads, an RA of 1 to 2 microns is achieved while radiusing all port holes uniformly. Also, all machining and grinding lines are removed with no change in the part geometry. Capabilities include miniature precision valves to giant nuclear power plant valves. |