Metal deforming – By use of tool acting during relative rotation between tool... – During rotation of work
Patent
1975-11-14
1977-09-27
Lanham, C.W.
Metal deforming
By use of tool acting during relative rotation between tool...
During rotation of work
291567R, B21B 120, B21B 142
Patent
active
040502759
ABSTRACT:
A method and apparatus for aligning the head of an engine valve in relation to the valve stem. A pair of die members is provided, the first die member being fixed relative to the frame of the apparatus and the second die member being cylindrical and rotatably mounted relative to the first die member. Each of the die members includes a surface for engaging the stem of the valve to straighten the valve stem as it is rolled between the surfaces in a generally arcuate path. A head straightening assembly is disposed adjacent the die members, including a straightening wheel freely rotatable relative to the die members. The straightening wheel includes a straightening surface which rollingly engages the surface of the valve head as the valve stem is rolled between the die surfaces in the arcuate path. The straightening surface is permitted to move at a surface speed approximately the same as the surface speed of the valve head, thus eliminating rubbing action between the valve head and the straightening surface, as well as any substantial torsional force on the valve stem.
REFERENCES:
patent: 1755663 (1930-04-01), Poetzinger
patent: 3930392 (1976-01-01), Matej
Crane Daniel C.
Eaton Corporation
Lanham C.W.
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