Abrasive Flow Machining

Abrasive flow Machining (AFM) technology is the latest machining method.

Abrasive Flow Machining

An abrasive medium (a flowable mixture of abrasive particles) to perform deburring, flashing, and rounding under pressure to reduce the waviness and roughness of the workpiece surface and achieve the precision of the processing.

The AFM method is the best alternative method for machining parts that require manual finishing or complex shapes, as well as other methods that are difficult to machine.

The AFM method can also be applied to workpieces that are not satisfactory for drum, vibration, and other large-volume processing or that are subject to injury during processing.

Moreover, it is possible to effectively obtain the delamination which is removed after the electric discharge machining or the laser beam processing, and the residual stress remaining on the surface of the previous process.

Machine tool composition

One is an abrasive flow processing machine that applies pressure to the abrasive.

The second is a fluid abrasive, which consists of a polymer material and abrasive grains.

The polymer material does not adhere to the metal and adheres well to the abrasive grains, and does not volatilize, thereby ensuring the flow of the abrasive grains.

The abrasive grains may be alumina, corundum, silicon carbide, boron carbide, cubic boron nitride, or diamond.

The third is the fixture, which fixes the workpiece and forms a fluid abrasive passage with the surface to be machined, and guides the fluid abrasive flow.


The Dynaflow Abrasive Flow Process (AFM), developed by the United States and Dynetics of the State of Massachusetts, is a metal finishing process that forces the abrasive-containing media to reciprocate across the surface or bore of the workpiece.

It has broad application prospects.

Fifty years ago, when the AFM first appeared, it was mainly used to remove the burrs of the inner passages and intersecting parts that were difficult to reach in the metal parts.

It is especially suitable for the processing of complex aerospace components made of difficult-to-machine alloy materials.

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