Process for Fragment Layup, Filler Application, and Outer Coating for PATRIOT GM Warhead M248
Abstract
A mechanized production 'dry' system was developed with capability to layup steel fragments onto warheads metal parts assembly, to replace the currently used 'wet layup' process. The mechanized process decreases dependence on scarce skills, increases producibility, and makes quality controls more manageable. Three layers of steel fragments (1/4-in. (6 mm) cubes) are laidup with epoxy adhesive. Each layer is spirally wrapped and contains over 7,000 continuous fragments. The Grumman-developed Integrated Autowrap System includes the following features: (1) a tape adhesive for chaining the fragments and adhering them to the warhead, and (2) a Gruman redesigned, fragment chain-wrap mechanism with hopper feed that aligns the fragments on the tape adhesive. The chain-wrap mechanism follows a spiral path to layup the fragments on the warhead ogive. This mechanized layout capability eliminated the need for the glass fabric-reinforced epoxy overwrap, the manual skill for spreading epoxy adhesive over the bonding surfaces, and three separate 12-hr room-temperature cures (one for each of the fragment layers). The Autowrap System made it convenient to accomplish 100% inspection of the positioned fragments prior to adhesive curing and improved the dimensional and weight controls for the PATRIOT Warhead Inert Parts Assemblies.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1981
- Accession Number
- ADA107536
Entities
People
- O. A. London
- O. Z. Starostecki
Organizations
- Grumman