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Abrasive Flow Machining (AFM) is a precision finishing process for complex internal geometries and difficult-to-reach surfaces.Its core technology hinges on three interconnected elements:Abrasive Flow Machine Uses Diamond Fine Powder,Silicon Carbide Powder or other Abrasives Mixed Into Polymer Elastic as a soft medium.The abrasives flow up and down through the inner holesor over the machined surface to achieve surface polishing.Especially suitable for all kinds of mould and irregular shape tiny cavities.
Abrasive flow is not only a device,but also a system engineering!It includes equipment,abrasives,tooling fixtures,and important detail design and experience,which are not only reflected in the final effect and efficiency,but also reflected in the long-term stable use,and can help customers save a lot of trial and error costs!The one-way automatic circulating fluid polishing machine uses the lower hydraulic cylinder to move and squeeze,so thatThe soft abrasive is extruded from the same inlet and from other channels,and repeatedly ground toTo achieve the purpose of polishing,deburring and chamfering.

This processing method is applicable to all kinds of curved flow channels,elbows or slender pipes,and large internalCavity and other workpieces that are not easy to polish,or precision parts to remove cross hole burrs,is the most importantSuitable processing method.And the grinding direction is consistent,which can effectively improvePerformance,quality and service life of the die or workpiece.After polishing,the finish can reach the mirror grade,and the best surface roughness can reach ra0.2μm.
The two-way reciprocating circulating fluid polishing machine makes the soft abrasive flow through the inner hole,machining surface or end angle by means of the motion extrusion of the upper and lower oil pressure cylinder blocks,and moves up and down for fine grinding,so as to achieve the processing of polishing,deburring and chamfering;This processing method is the most suitable processing method for complex shapes that are not easy to polish,such as various special-shaped holes,tooth surfaces,concave convex surfaces,or for removing cross hole burrs from precision parts.And the grinding direction is consistent,which can effectively improve the performance,quality and service life of the mold or workpiece.After polishing,the finish can reach the mirror grade,and the best surface roughness can reach ra0.025~ra0.01 um.
First,the viscoelastic abrasive medium,a proprietary polymer carrier embedded with abrasive grains (like silicon carbide or diamond).This semi-solid medium is the heart of the process.Its unique rheology allows it to behave like a viscous putty under low pressure,enabling it to conform to intricate shapes,and like a viscous fluid under high extrusion pressure,activating the abrasives for cutting action.The medium's composition,including polymer viscosity,abrasive type,concentration,and size,is precisely tailored for specific material removal and finishing requirements.Second,the precisely controlled hydraulic system.This system generates the necessary pressure to extrude the medium back and forth through the workpiece,which is held in a custom fixture.Critical parameters such as extrusion pressure,flow volume,number of cycles,and stroke speed are meticulously controlled.

Higher pressures and more cycles increase aggressiveness for greater material removal,while finer control is needed for achieving a superior final surface finish.
Third,the dedicated tooling and fixturing.To direct the medium's flow precisely over the target areas and prevent leakage,purpose-built fixtures are essential.
These fixtures often incorporate tooling (e.g.,mandrels or plugs) that strategically alter flow paths to focus abrasive action on specific edges,radii,or passages,ensuring uniform and consistent finishing across production batches.
In essence,AFM technology is the synergistic combination of a smart,adaptable medium,a powerful and controllable machine,and precise tooling,working in unison to achieve deburring,radiusing,and polishing that are unattainable by conventional methods.

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