EDIFICE OF SLAPPING APPLIANCE AND SLAPPING OF POWERED SEALS USING SG (500/7GRADE) IRON SLURPING DISCUS TOOL PLATTER

Lapping is a finishing process where loose abrasive grains contained in slurry are pressed against a work piece to reduce its surface roughness. To perform a lapping operation, the worker needs to set the values of the respective lapping conditions (e.g., pressure, depth of cut, the rotational speed of the pressing lap plate) based on some material properties of the work piece, abrasive grains, and slurry, as well as on the desired surface roughness. This project thus helps systematize lapping operations in regard to real-world applications (Mechanical seals) The main aim of this work is to minimize the surface roughness in the flat lapping using EN8 material manually and by using SG IRON material in machine and comparing the obtained results using RA value. The process variables considered for the study were lapping time, abrasive size and abrasive carrier oil proportion. The significance of each process variable on the surface roughness was studied. From the results, it was inferred that most influence factor among process variables is abrasive carrier oil proposition in slurry/ paste. It was understood that minimum aluminum oxide abrasive proportion in slurry provides better surface quality in lapping using EN8 material. The optimum combination to achieve minimum surface roughness were 45 minutes lapping time, when using EN8 material; but whereas in using SG IRON (consideration of aluminium oxide is negligible) as tool in lapping process in lapping machine, the surface roughness can be reduced to required value ef ectively in 5-8 minutes