Surface Finishing Processes

Surface Finishing Processes

Surface Finishing Processes - Modern developments of high speed machines have resulted in higher loadings and increased speeds of moving parts. Bearings, seals, shafts, machine ways and gears, for example, must be, accurate dimensionally and geometrically dimensional and geometrical accuracies obtained by machining methods like turning, milling, planing etc., are limited.

In addition, surface finish has a vital influence on properties such as wear, friction, fatigue and corrosion resistance. If surface finish is poor, oil film will rupture on the peaks of the micro irregularities on the work surfaces, a state of dry friction will reach and the result will be excessive wear of the rubbing surfaces.

microfinishing processes such as
1. Honing
2. Lapping, and
3. Superfinishing, are employed for final machining of workpieces. In these processes, peaks of surface micro irregularities remaining after a previous machining operation are removed. Micro finishing processes can provide both

Very close dimensional accuracy and

High surface finish.

If the product requirement is only the high degree of surface finish and a very close dimensional accuracy is not needed, the required surface finish is obtained by the following processes,

1. Polishing, and

2. Buffing.

A few other surface finishing processes are .Abrasive belt finishing and mass finishing.