HARPER “POLISHING” SYSTEMS
Abrasive Machining Polishing with abrasives bonded to a flexible backing has excellent capability to modify product shapes, dimensional changes and heavy stock removal. Belt polishing is far more forgiving than hard wheel grinding and is excellent for generating scratch patterns and tracing complex parts for surface refinement. When used with lubrication, abrasive belt machining can improve the microfinish of polished products and eliminate problems with heat discoloration, distortion and warping.
- Belt Polishing Slack-of-the-belt heads and endless belts backed by varying durometers of contact wheels offer a tremendous amount of flexibility. Belt polishing can remove casting and forging lines, parting lines, weld seams and is effective on heavy burr removal.
- Flap Wheel Polishing Flap wheels are extremely versatile for specialized polishing on components with contours, steps and internal or external radii. The abrasive paper of the flapwheel can be shaped to match the component face, slit for tracing profiles or combined with cushioning material for greater flexibility.
PROBLEM: Uniform finish
SOLUTION: A 72" diameter indexing rotary table with an auto load and unload system removes all imperfections from the casting operation.
A high polish finish is also achieved prior to final assembly. Production rate: 600 parts per hour.
PROBLEM: Flash and excess paint removal
SOLUTION: Utilizing slack of the belt technology, all excess flash and paint is removed at the rate of 3,000 pieces per hour. Pressure-sensitive controls allow for accurate removal of the paint and exposure of the underlying corded T-grip. An air discharge system unloads the grips after processing.
PROBLEM: Remove zinc die cast flash and sharp edges
SOLUTION: A straight line V5 conveyor transports soleplates under several belting heads to remove excess die cast flash and apply a uniform edge chamfer.
Additional heads radius all steam ports and prepare the ironing surface for a silverstone or teflon finish prior to assembly. Production rates: 750 per hour.
PROBLEM: Pre-polish and final buff required
SOLUTION: Prior to a copper/nickel-chrome plating operation, a preliminary pre-polish is accomplished by two abrasive belt heads. The overall pre-plate finish is produced by two buffing heads. Production rates are in excess of
500 pieces per hour.