Metal deforming – By use of tool acting during relative rotation between tool... – During rotation of work
Patent
1994-08-11
1997-05-27
Larson, Lowell A.
Metal deforming
By use of tool acting during relative rotation between tool...
During rotation of work
B21K 108
Patent
active
RE0355194
ABSTRACT:
A method and apparatus for smooth-rolling and deep-rolling the journal pins of multi-crank crankshafts divides the crank pins into two groups, each including alternating crank pins, since the space between neighboring crank pins is insufficient for simultaneously rolling all of the pins including the main bearing pins in one operation. Each group of crank pins is then rolled separately in succession, whereby one group includes the main bearing pins. Thus, a crankshaft, including any number of closely spaced crank pins, can be completely machined in two rolling operations. In order to carry out this method a rolling apparatus includes crank pin rolling devices for each of the pins of one group. The rolling devices are axially slideably adjustable in unison between two determinable positions in which they may be fixed or locked after adjustment. The crank pin rolling devices are spaced from one another with a sufficient spacing in the axial sliding direction so that at least one crank pin can pass between two adjacent crank pin rolling devices.
REFERENCES:
patent: 4290238 (1981-09-01), Judge, Jr.
patent: 4485537 (1984-12-01), Berstein et al.
patent: 4559798 (1985-12-01), Hayashi et al.
patent: 4766753 (1988-08-01), Berstein et al.
Hegenscheidt Corp. Drawings: 85-E-10820, 85-E-10821, 85-E-10822.
Larson Lowell A.
Wilhelm Hegenscheidt GmbH
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