How many holes in a composite assembly typically require deburring?

In composite assembly, the necessity for deburring typically arises from the manufacturing process, which can leave sharp edges or burrs around holes punched or drilled through the composite material. If the surfaces around the holes are not smooth, they can lead to problems such as improper fit, stress concentrations, or even failures during use.

In many cases, particularly with modern composite manufacturing techniques, the focus is on minimizing manual finishing processes. Depending on the specific application and the manufacturer's standards, it may be the case that none of the holes require deburring because the composites are designed and manufactured to such precision that they don't present any sharp edges after the cutting or drilling process.

In other words, if the machining and finishing are completed to high standards, it’s plausible for a composite assembly to not require any post-processing of the holes. Therefore, in this context, it is accurate to state that none of the holes typically require deburring, making it the correct choice.