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A part's-eye view of a boring bar. Hole types: Blind hole (left), through hole (middle), interrupted hole (right). In machining, boring is the process of enlarging a hole that has already been drilled (or cast) by means of a single-point cutting tool (or of a boring head containing several such tools), such as in boring a gun barrel or an engine cylinder.
Thus very high surface qualities with bore hole tolerances of IT 9 to IT 7 can be achieved by deep hole drilling processes. Subsequent steps to improve the surface quality of the bore hole can often be reduced or eliminated completely. A further advantage is the low burr formation for trough holes and for over-drilling cross holes. [1]
Unprotected bore evacuators damaged by bullets have caused considerable problems in past conflicts, but up-armoring solved this problem. Bore evacuators are a common feature on most modern tanks and some self-propelled guns. The French Leclerc tank is a counterexample; it instead uses overpressure from an internal compartment to force gases ...
BOA connects the technical, IT-facing tools of SOA with the core process improvement functions of BPM. [ 1 ] [ 2 ] [ 3 ] The current theory of BOA allows a company to manage, automate, and integrate critical processes, applications and functions, legacy applications , and components in a unified interoperability BOA to achieve business goals.
The jig borer is a type of machine tool invented at the end of World War I to enable the quick and precise location of hole centers. It was invented independently in Switzerland and the United States. [1]
BAE Systems Platforms & Services is a wholly owned subsidiary of BAE Systems Inc. and is a large provider of tracked and wheeled armored combat vehicles, naval guns, naval ship repair and modernization, artillery and missile launching systems, advanced precision strike munitions and ordnance, and other technologies for U.S. and international customers.
Freighter Fairpartner carrying the disassembled tunnel boring machine into the Port of Seattle in April 2013. Bertha was designed and manufactured by Hitachi Zosen Sakai Works of Osaka, Japan, and was the world's largest earth pressure balance tunnel boring machine, [14] at a cutterhead diameter of 57.5 feet (17.5 m) across.
BAE Systems Southeast Shipyards is a division of BAE Systems Ship Repair, which itself is a subsidiary of BAE Systems Inc., the North American arm of British defense conglomerate BAE Systems. It was formed through the acquisition of Atlantic Marine from the J.F. Lehman and Company private equity firm in May 2010 for $352 million. [4] [5] [6]