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5 Operating Principles Of Abrasive Jet Machining Principles

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Chapter: 1 Introduction 1.1 Abrasive Jet Machining Principle 1.2 Equipment 1.3 Variables in Abrasive Jet Machining 1.4 working 1.5 Operating characteristics 1.6 Advantage and Limitations 1.7 Application

1. Introduction

1.1 Abrasive jet machining principle:
Abrasive Jet Machining (AJM) is the removal of material from a work piece by the application of a high speed stream of abrasive particles carried in gas medium from a nozzle. The AJM process is different from conventional sand blasting by the way that the abrasive is much finer and the process parameters and cutting action are both carefully regulated. The process is used chiefly to cut intricate shapes in hard and brittle materials which are sensitive to heat and have a tendency to chip easily. The process is also used for drilling, de-burring and cleaning operations. AJM is fundamentally free from chatter and vibration problems due to absence of physical tool. The cutting action is cool because the carrier gas itself serves as a coolant and takes away the heat.
Abrasive jet machining also known as micro abrasive blasting, is a mechanical energy based
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The main components being the compressor, air filter regulator, mixing chamber, nozzle and its holder, work holding devices and X-Y table. Air from the atmosphere is compressed by the compressor and is delivered to the mixing chamber via the filter and regulator. The mixing chamber contains the abrasive powders and is made to vibrate by an electric motor arrangement. Then the abrasive particles are passed into a connecting hose leading to the nozzle. This abrasive and gas mixture emerges from the orifice of nozzle at high velocity. The feed rate of abrasive air is controlled by the amplitude of vibration of the mixing chamber. A pressure regulator installed in the system controls the gas flow and
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