Excel Producing Gear Boxes for Advanced Gun System (AGS) on Navy's DDG 1000 Class of Warships
36:1 ratio gear box assists positioning of 78-ton turret
Excel Gear, Inc. of Roscoe, Illinois announces its transition from the prototype to the production stage on the first order of its 36:1 ratio gear boxes, specifically designed to assist positioning of the 78-ton gun turrets utilized in the Advanced Gun System (AGS) program. BAE Systems of Minneapolis, Minnesota, the Excel customer for this project, recently approved the prototypes on these 36:1 ratio gear boxes. BAE Systems is the primary contractor on the AGS, designed for use on the DDG 1000 destroyers used to support U.S. Navy and Marine Corps expeditionary and joint operation in the littorals and deep inland.
BAE Systems developed the AGS as a complete weapons delivery system, utilizing extensive rapid and virtual prototyping for the gun, magazine, ammunitions and support subsystems integration. The gear boxes built by Excel Gear are vital components in the positioning execution of movements on the gun turret. Overall, each gear box is 46" long, 36" diameter and weighs 3,740 lbs. The peak output torque capacity of the gear box is 26,500 ft. lbs.
The AGS is a 155mm gun weapon system, designed for installation on the Navy's DDG 1000 class of land-attack destroyers. The AGS produces high-volume, sustainable gunfire of guided or unguided projectiles at targets over 70 nautical miles. This system is capable of firing 12 rounds per minute from a fully automated magazine, up to 600 rounds. The 155mm rounds are approximately 6.1 inches in diameter.
Excel Gear was responsible for the complete design and prototyping of the gear box and utilized its full CAD, Finite Element Analysis and manufacturing facilities in Roscoe, Illinois to produce a pair of prototypes for evaluation and performance testing at BAE Systems, prior to release of the production order. According to Mr. N.K. Chinnusamy, president of Excel Gear, "This achievement marks a very important milestone in the history of our company and we all worked very diligently as a team to attain this business and see its successful execution. Everyone at Excel Gear is proud to be a part of the AGS program."
In operation, the Excel gear box assists with the rotary and vertical positioning of the AGS turret. Extensive testing on the gear box prototypes were performed at both Excel and BAE Systems to validate the specifications. In detailing the challenge of limiting gear backlash in this critical application, Mr. Chinnusamy explains, "Backlash in this case is controlled by precision grinding gears to close tolerance and also grinding splines to fit master gages. The gear box had to meet very precise backlash, lost motion and stiffness criteria and our two prototype gear boxes met all the criteria without any exceptions."
ABOUT EXCEL GEAR
Excel Gear brings over 50 years of machine experience to the design, manufacturing and quality analysis of its various gear, fluid bearing, spindle, CNC gimbal head, nutator and special equipment production. ANSYS software for FEA on stress, strain, deflection, as well as modal analysis, time and frequence domain, our Spindle Analysis Program, MATLAB/Simulink, AutoCAD/SolidWorks/CADAM and other programs are all utilized to effect the best solutions to customer requirements. Excel also builds two-axis CNC gimbal heads with 20,000RPM motorized spindle, 15,000RPM cartridge type spindle assemblies and CNC rotary tables for major machine tool companies. Our high-accuracy gear grinding equipment produces to AGMA 15 (DIN 2) tolerances for quality that meets or exceeds the increasing customer demands for high-speed and high power transmission with smooth, quiet operation.
For more information on this success, please contact:
EXCEL GEAR, INC.
11865 Main Street
Roscoe, IL 61073
Phone: 815-623-3414
Fax: 815-623-3314
Web: www.excelgear.com
Email: sales@excelgear.com
N.K. Chinnusamy, President
