120-mm Target Practice Cone Stabilized Discarding Sabot with Tracer (TPCSDS-T) M865 (E3) Rework Report (Pop-Rivet Design)
Final technical rept.
ARMY ARMAMENT RESEARCH DEVELOPMENT AND ENGINEERING CENTER PICATINNY ARSENAL NJ
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In 1998 to 1999, a major redesign of the M865 adapter and insert cover interface was undertaken. A snap-joint method was adopted and put into the field for testing. A few months later, reports of failure were reported and a team was brought together to investigate the problem. The primary focus of the group was to reinforce the joint configuration without disassembling the cartridge, insuring chemical compatibility, and meeting all ballistic requirements. The team came up with three different solutions for field fix rework a pop rivets b foam fill, and c pool of epoxy. The foam design was the number one choice of the team, but the pop rivets had lower overall risk. The pop-rivet design was chosen over the others because of its low maintenance and symmetry. The design consisted of 15 countersunk pop rivets equally spaced around the circumference of the case adapter. The pop-rivet design was put through the entire screening process and the scenario provided adequate axial support, while passing all of the qualification testing. Suspended cartridges could now be reworked and reissued to the stockpile.
- Couplers, Fasteners and Joints
- Ammunition and Explosives