Metal deforming – With use of control means energized in response to activator... – Including use of sensor responsive to energy input to tool...
Patent
1995-01-09
1996-03-12
Larson, Lowell A.
Metal deforming
With use of control means energized in response to activator...
Including use of sensor responsive to energy input to tool...
B21H 100
Patent
active
054976421
ABSTRACT:
An apparatus and method for forming precision surface shapes on shaft-like parts comprises a pair of substantially cylindrical and rotatable dies having forming surfaces located adjacent a shaft-like part therebetween. The shaft-like part is located in a size control ring according to this invention and is concentric with an axis of rotation of the size control ring. Each of the dies includes a size control surface that pressurably engages the size control ring. The size control ring is sized so that the forming surfaces are located at a predetermined forming depth in the shaft-like part when a predetermined level of preload force is applied between the size control surfaces and the size control ring. It is contemplated that the size control ring experiences elastic deflection upon application of the predetermined preload. A size adjustment mechanism is provided to vary the preload applied by the dies on the size control ring and the part. This adjustment mechanism can include a nut and screw or, alternatively, a hydraulic press. Similarly, a single pair of opposing forming surfaces can be provided or a plurality of axially displaced forming surfaces can be provided.
REFERENCES:
patent: 1118732 (1914-11-01), Breedlove
patent: 3599463 (1971-08-01), Sennstrom et al.
patent: 3605468 (1971-09-01), Okray
patent: 4045988 (1977-09-01), Anderson
patent: 4322961 (1982-04-01), Greis
patent: 5379620 (1995-01-01), Greis
Kinefac Corporation
Larson Lowell A.
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