Northrop Grumman Systems Corporation

Brian J Hill

Terence F W Hall

Thomas J Ambrose

William R DeLeon

Ernie G Ozawa

Bettie E M Marino

In accordance with the present invention, there is provided a method of inserting at least one Z-pin into a composite laminate for providing Z direction reinforcement thereto. The method comprises the initial step of positioning at least one Z-pin upon the composite laminate. Thereafter, an insertion force is applied to the Z-pin at a first level which is sufficient to commence an insertion process wherein the Z-pin is driven into the composite laminate at a first insertion speed. The insertion force applied to the Z-pin is continuously monitored, with the first insertion speed being reduced to a second insertion speed in response to a monitored increase in the insertion force from a first level to a second level.

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Torrance, CA, United States of America

Brian J Hill