Quality

Difference between rough cut and finish cut in machining
Engineering

Engineering

Machining or metal cutting is one of the secondary manufacturing processes by which excess material is gradually removed from a preformed blank to obtain desired shape, size and finish. There exist larger number of processes to fulfil the basic requirement of machining. Such processes can be broadly classified as conventional machining processes (turning, threading, facing, drilling, boring, shaping, planing, milling, grooving, reaming, etc.), abrasive cutting processes (grinding, lapping, honing, polishing,

Surface profile of a highly finished surface
Engineering

Engineering

Primary aim of secondary manufacturing processes is to obtain products having better surface quality, high dimensional accuracy and close tolerance. Such processes include machining or metal cutting operations (like turning, milling, drilling, reaming, precision turning, grinding, lapping, honing, AJM, USM, EDM, LBM, IBM, etc.) and surface modification operations (like heat treatment, coloring, coating, etc.). Each of these processes has varying level of capabilities in terms of surface quality and precision.

Surface integrity (SI) data set by Field et al. (1972)
Engineering

Engineering

Functional performance of any solid surface relies on the physical conditions and chemical composition of the concerned surface and subsurface layers. Quality is defined as fit for intended purpose. Similarly, quality of a solid surface is one subjective matter and its assessment primarily depends on intended functionalities. Let us explain the same with examples. With respect to decorative artefact, appearance of the surface has importance rather than presence of micro-cracks