SILK in association with Central Manufacturing Technology Institute (CMTI) is developing a range of systems to finish complex internal profiles including valves, valve-bodies, forging dies and the like via the technique of Abrasive Flow Machining
In abrasive flow machining, the abrasive fluid flows through the workpiece under hydraulic pressure, effectively performing material removal to the required degree to arrive at the necessary surface finish. The highest amount of material removal occurs in areas where the flow of the fluid is restricted and the resistance to flow is maximum. The uniform pressure exerted by the fluid on all contacts surfaces also results in a very uniform finish.
AFM may be performed once, as a one-way flow process, or repeatedly as a two-way flow process. In the two-way flow process, a reservoir of medium exists at either end of the workpiece, and the medium flows back and forth through the workpiece from reservoir to reservoir.