Lapping process

Lapping Process

1. Lapping Process By Er . Rampal Singh Ojha

2. Lapping Process The term  "lapping"  is used to describe a number of various surface finishing operations where loose abrasive powders are used as the grinding agent at normally low speeds. It is a process reserved for products that demand very tight tolerances of flatness, parallelism, thickness or finish

3. Lapping Process Loose Abrasive Process-(LAP) Lapping Involves the Use of Abrasive Particles to Modify the Work-Pieces The Abrasive Particles are Mixed with a Water-Base or Oil Base Liquid. The Combined Abrasive and Liquid are Called a “Slurry”, this is a Liquid Cutting Tool The Slurry is Placed on a Rotating Motorized Platform Called a “Lap Plate” The Work-Piece is then Placed Against the Slurry on the Rotating Lap Plate and the Surface of the Work-Piece is Modified Rolling/Sliding Action of Abrasive Grains Between Plate and Work piece

4. Lapping Process A surface that has been lapped exhibits a dull, non-reflective and multi-directional appearance This is especially true if the material is relatively hard and the surface roughness measurement is perhaps 5 (.127 micron) micro-inch and below .