 It is the material removal process where the material is removed by high velocity stream of air/gas or water and abrasive mixture.  An abrasive is small, hard particle having sharp edges and an irregular shape.  High velocity jet is aimed at a surface under controller condition.

 Abrasive delivery system  Control system  Pump  Nozzle  Mixing tube  Motion system

Auto abrasive delivery system has the capability of storing abrasive & delivery the abrasive to the bucket. It’s works auto programming system by help of once measuring record & no adjustment or fine tuning system. High sensitive sensor gives extremely reliable & repeatable.

 The control algorithm that computes exactly how the feed rate should vary for a given geometry in a given material to make a precise part.  The algorithm actually determines desired variation in the feed rate & the tool path to provide an extremely smooth feed rate.

 Crankshaft & intensifier pump are mainly use in the abrasive jet machine.  The intensifier pump was the only pump capable of reliably creating pressures high.  Crankshaft pumps are more efficient than intensifier pumps because they do not require a power robbing hydraulic system ultra high pressure & more stroke per minute.

 All abrasive jet systems use the same basic two stage nozzle. First, water passes through a small diameter jewel orifice to form a narrow jet.  The abrasive particles are accelerated by the moving stream of water & they pass into a long hollow cylindrical ceramic mixing tube.  Generally two type of nozzle use, right angle head & straight head.

 The mixing tube is where the abrasive mixes with the high pressure water.  The mixing tube should be replaced when tolerances drop below acceptable levels.  For maximum accuracy, replace the mixing tube more frequently.

 In order to make precision parts, an abrasive jet system must have a precision x-y table and motion control system.  Tables fall into three general categories. Floor-mounted gantry systems Integrated table/gantry systems Floor-mounted cantilever systems

 High pressure water starts at the pump, and is delivered through special high pressure plumbing to the nozzle.  At the nozzle, abrasive is introduced & as the abrasive/water mixture exits, cutting is performed.  Once the jet has exited the nozzle, the energy is dissipated into the catch tank, which is usually full of water & debris from previous cut.

 There are main features of AJM  Obtainable tolerances  Material to machine  Material thickness  Accuracy of table  Stability of table  Control abrasive jet

 Around curves  Inside corner  Feed rate  Acceleration  Nozzle focus  Speed cutting  Pump pressure  Hardness & thickness  Software controlling the motion  Power at the nozzle

 Different types of abrasive are used in abrasive jet machining like garnet, aluminum oxide, olivine, silica sand, silicon carbide,etc.  Virtually any material can be cut by using abrasive jet machining method, i.e harder materials like titanium to steel.  Abrasive particles must be hard,high toughness, irregular in shape & edges should be sharp.

 Extremely fast setup & programming  No start hole required  There is only one tool  Low capital cost  Less vibration  No heat generated in work piece  Environmentally friendly

 Low metal removal rate  Due to stay cutting accuracy is affected  Abrasive powder cannot be reused  Tapper is also a problem

 The better performance, and the applications represented above statements confirm that ABRASIVE JET MACHINING is continue to expand.  The new software’s used to minimize time and investments, there by making it possible for more manufacturers of precision parts to install AJM centers.