DEVICE FOR LAPPING TAPERED MATING SURFACES OF PARTS

摘要

Apparatus for lapping the tapered mating surfaces of parts, mainly bells and cups of blast furnace charging devices, and for ensuring accurate orientation in space of the parts during lapping and control of the load in the lapping contact zone. A cup is held rigidly on a stand while a bell in inserted into the cup with a thin layer of abrasive compound between the mating parts. The bell is then given a reciprocating-rotary lapping motion and occasionally, momentarily raised to slightly separate mating contact so as to ensure reorientation of abrasive grains, improve lapping efficiency and reduce lapped surface roughness.