Design and Construction of a Refined Step Threading Machine for 175MM and 8 Inch Breech Rings,
ARMY ARMAMENT RESEARCH AND DEVELOPMENT CENTER WATERVLIET NY LARGE CALIBER WEA PON SYSTEMS LAB
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This report details the engineering design and production application of a special purpose machine, tooled to produce internal step threads constant lead thread on two distinct diameters on 8 in M201 breech rings. The machine, using oscillating motion and a full thread form tool, produces the full thread on each sector, then is indexed in turn to the next sectors until all eight 8 are complete. The use of this equipment has reduced the floor to floor time from 13 hours to 4 hours while producing better thread finishes and more accurate dimensional sizes.
- Manufacturing and Industrial Engineering and Control of Production Systems
- Machinery and Tools