FAQ – Hydraulics

We have a hydraulic valve body with over 100 intersecting holes, of differing sizes. Can Extrude Hone AFM deburr all these intersections?

Yes, with a fixture to direct the flow of media through the holes, so as to establish a flow path through the part, in a majority of cases, all the intersecting holes can be deburred and radiused simultaneously.

How do you control the amount of material removed?

Primary variables are the tooling, the media flow pressure, the viscosity and abrasive concentration of the media.

The tooling is a holding fixture that directs media flow to the target area of the part, while protecting areas where abrasion is not desired.  Media flow pressure available has a range of 200 to 2000 psi.

The media carrier, silicon rubber, comes in three basic viscosities:  high, medium and low; while the silicon carbide abrasive ranges in size from the fineness of baby powder to the coarseness of buckshot.

All these taken together are manipulated to produce the desired result on the workpiece.  For this reason, each and every application destined for Extrude Hone AFM has to be engineered and developed.

What dimensional tolerances can Extrude Hone hold?

We can hold tolerances within 1 – ten-thousandths of an inch (.00001).  A human hair is approximately three to four thousandths of an inch in diameter (.003-.004).  That is some 30 to 40 graduations of the tolerances we can hold.

How do you remove the media from all those internal holes and passages?

The media is a cohesive semi-solid mass.  A gentle blast of shop air in the passages will send the media out in a neat little slug.  After that, simple rinsing and flushing with solvent will get the parts clean.
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