Optimization and Fabrication of the nozzle in AJM using CAM

Author Name : Dr. A. K. Madan, Akash Arora, Ayush Singh, Dennis Toppo, Gaurav Ahuja

INTRODUCTION

The abrasive jet machining process (AJM) is an advanced manufacturing process where a high-speed flux of abrasives in the gas material that emerges from a nozzle is removed from the workpiece by the erosion effect. The high-speed abrasive jet is acquired by passing abrasive particles in the carrier gas, which is at high pressure causing the particles to accelerate at high velocity. It's a mechanical energy-based manufacturing process. The machining process occurs by abrasive particles' bombardment on the workpiece, which creates cracks/fractures. This happens due to the abrasive particles' high kinetic energy, which on hitting the workpiece generates a gap resulting in the plastic deformation of the workpiece. An abrasive particle's impact force can cause pierce cuts on the work surface for hard and fragile materials.

Consequently, mainly through the formation and spread of cracks during subsequent effects, the target material is removed. There are various components in Abrasive Jet Machining that contribute to the working of the machine efficiently. The nozzle for abrasive jet machining is a component that transforms pressure energy into kinetic energy in the form of a high-speed jet consisting of a high pressurized gas-abrasive mix. The nozzle also directs a high-speed jet to the workpiece from a certain distance called Stand of Distance and, at a certain default angle, called the angle of impingement. The jet's interior diameter for absolute gas pressure is the parameter, as it determines the last speeds and transverse areas of the jet. As flow and compressor supply pressures are constant, the jet speed is inversely proportional to the jet cross-section. Abrasive processing involves super finished grinding, polishing, engraving, work surface cleaning, and many more applications.