Advance Mechanicals Processes

                                            Abrasive Jet Machining

         Abrasive Jet Machining is a material removal process with the help of concentrated abrasive grains enclosed in a nozzle that removes by the action of impact erosion. In abrasive-jet machining, a high-velocity jet containing abrasive particles is aimed at the workpiece surface under controlled conditions.

     Table of Contents

1. Abrasive Jet Machining Definition:

2. Abrasive Jet Machining Parts or Construction:

3. Abrasive Jet Machining Working Principle:

4. Abrasive Jet Machining Advantages:

5. Abrasive Jet Machining Disadvantages:

6. Abrasive Jet Machining Application:

    Abrasive jet machining

                   Abrasive jet machining (AJM), also known as abrasive micro-blasting, pencil blasting and micro-abrasive blasting, is an abrasive blasting machining process that uses abrasives propelled by a high velocity gas to erode material from the workpiece. Common uses include cutting heat-sensitive, brittle, thin, or hard materials. Specifically it is used to cut intricate shapes or form specific edge shapes.

  Abrasive Jet Machine Advantage 

                   The main advantages are its flexibility, low heat production, and ability to machine hard and brittle materials. Its flexibility owes from its ability to use hoses to transport the gas and abrasive to any part of the workpiece. Normally inaccessible portion can be machined with good accuracy.

Abrasive Jet Machine Disadvantage 

                   One of the main disadvantages is its slow material removal rate; for this reason it is usually used as a finishing process. Another disadvantage is that the process produces a tapered cut.

Abrasive Jet Machine Parts or Construction 

                   The metal is removed due to erosion caused by the abrasive particles impacting the work surface at high speed. With repeated impacts, small bits of material get loosened and a fresh surface is exposed to the jet.

The fundamental principle of Abrasive jet machining involves the use of a high-speed stream of abrasive particles carried by a high-pressure gas or air on the work surface through a nozzle.

Following are the parts of abrasive jet machining:

• Gas supply
• Nozzle
• Abrasive
• Workpiece
• Pressure regulator
• Filters
• Foot control valve
• Holder
• Hood

Abrasive Jet Machine Application 

• Cutting slots and thin sections.
• Contouring and drilling operation.
• Producing shallow crevices and deburring.
• Producing intricates hole shapes in a hard and brittle material.
• Cleaning and polishing the plastic, nylon and Teflon component.
• Frosting of the interior surface of glass tubes.
• Etching of marking of glass cylinders.
• Machining super-alloys and refractory material.