Metal working – Method of mechanical manufacture – Assembling or joining
Patent
1975-10-08
1977-04-26
Moon, Charlie T.
Metal working
Method of mechanical manufacture
Assembling or joining
53 37, 219121EB, 228221, B23P 1900
Patent
active
040192423
ABSTRACT:
Method and apparatus for filling viscous dampers in which the method comprises assembling a damper housing with an inertia weight placed loosely therewithin and a housing top having a single aperture therein and adapted to provide a complete closure for the inertia weight, placing the assembly in a vacuum chamber equipped with an electron beam welding device and means for effecting relative movement between the assembly and the electron beam welding device, and inserting a valve and fitting sealingly within said aperture with the valve in an open position, evacuating the vacuum chamber to provide a vacuum within the chamber and within the damper assembly, effecting movement between the assembly and the device to sealingly weld the top to the damper housing, closing the valve, attaching means for supplying a viscous fluid under pressure to said valve, removing the valve from the damper assembly, and welding a plug within the aperture to sealingly retain the fluid within. The apparatus comprises a vacuum chamber, an electron beam welding device mounted for welding within said chamber, means for positioning a viscous damper assembly within said chamber, said damper assembly comprising a damper housing and a cover therefor with an inertia weight disposed therewithin, said damper assembly also comprising a single aperture for filling the damper with a viscous fluid, means for evacuating the vacuum chamber and damper assembly disposed within, means for providing a relative movement between said assembly and said welding device for effecting a complete weld between the housing and cover, and means for filling the welded assembly through said aperture.
REFERENCES:
patent: 2347046 (1944-04-01), Geiger
patent: 2846829 (1958-08-01), Eskin
patent: 3349859 (1967-10-01), Cox et al.
patent: 3470671 (1969-10-01), Gettig et al.
patent: 3512612 (1970-05-01), Bragg et al.
patent: 3564813 (1971-02-01), Stell
patent: 3771380 (1973-11-01), Bahr
Miller Kenneth J.
Patton Eugene K.
Zook Donald G.
Caterpillar Tractor Co.
Moon Charlie T.
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