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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 machining (AFM) achieves complex internal polishing using viscous abrasive mediathrough a combination of controlled fluid dynamics,abrasive action,and precise tooling design. Here’s a step-by-step explanation of how it works:
1. Viscous Abrasive Media 
The polishing process relies on a semi-solid,polymer-based abrasive medium(like silicone or gels) mixed with fine abrasive particles (e.g.,silicon carbide,diamond,or aluminum oxide).High viscosityallows the medium to conform to intricate shapes.Adjustable rheology(flow behavior) ensures it can reach deep cavities,bends,and cross-holes.  
2. Hydraulic Pressure & Flow Dynamics 
The AFM machine uses hydraulic or mechanical pressureto force the abrasive media back and forth through the workpiece:Bi-directional flowensures uniform material removal.High pressure (up to 200 bar)enhances cutting action in tight spaces.Low-pressure zonesallow for fine finishing.  
3. Tooling & Fixturing for Complex Geometries 
Specialized tooling guidesand fixturesdirect the abrasive flow precisely where needed:Mandrels & masksblock unwanted areas,focusing abrasion on critical surfaces.Flow restrictorsincrease velocity in tight passages for better polishing.  
4. Abrasive Particle Action 
As the media flows,the abrasive particles:Shear & micro-cutsurface peaks (removing burrs and imperfections).Burnishthe surface for a smooth finish (like lapping).  
Self-renewas fresh abrasives continuously engage the surface.  
Xi'an KDL Abrasive Flow Precision Machinery Co.,Ltd. is dedicated to providing customers with automated,intelligent,and more precise polishing and deburring solutions.The company develops and produces a wide range of abrasive fluid polishing equipment for applications in the automotive industry,aerospace engines,military applications,food processing equipment,medical devices,mold manufacturing,textiles,oil and gas valve bodies,tool passivation,hot runner plates,3D printing,precision ceramics,and electronic components.The company has achieved multiple international certifications,including ISO9001 quality system certification and CE certification,and its product distribution channels cover over 20 countries and regions worldwide,including Europe,North America,East Asia,and Southeast Asia.
KDL offers unique advantages in polishing and deburring various internal holes and curved channels,such as curved,intersecting,irregular,and micro-sized holes,which are difficult to reach with conventional tools. This effectively improves the performance,quality,and service life of molds and workpieces,achieving mirror-like polishing results.