Metal deforming – By deflecting successively-presented portions of work during... – By use of deflector arranged to bend work transversely of...
Patent
1996-04-23
1997-11-04
Larson, Lowell A.
Metal deforming
By deflecting successively-presented portions of work during...
By use of deflector arranged to bend work transversely of...
72199, 723662, 72181, B21D 514, B21D 508, B21D 4701, B21B 100
Patent
active
056827830
ABSTRACT:
A roll assembly suitable for use in the production of thin-wall heat exchanger tubes using a high-frequency induction welding tubemill. The roll assembly includes a roll portion that has an arcuate precision profile that defines one-half of the desired cross-sectional shape of the tube being produced by the tubemill. The assembly further includes a shaft portion that directly supports the roll portion so as to serve as a journal bearing for the assembly. At least the bearing surfaces, and preferably the entire roll assembly is formed from ceramic or ceramic composite materials, without any separate bearing components. Moreover, the roll portion of the assembly is formed from a different material than the shaft portion, in a combination that reduces wear between the bearing surfaces of the roll and shaft portions.
REFERENCES:
patent: 3535904 (1970-10-01), Bindernagel
patent: 3577619 (1971-05-01), Strandel
patent: 4056873 (1977-11-01), Cassard et al.
patent: 4770549 (1988-09-01), Rokkaku et al.
patent: 4777822 (1988-10-01), Uemura et al.
patent: 4817410 (1989-04-01), Yatsuzuka et al.
patent: 4876875 (1989-10-01), Bruggeman et al.
patent: 4924688 (1990-05-01), Cutmore
patent: 5005395 (1991-04-01), Yasumura et al.
patent: 5040398 (1991-08-01), Nakagawa et al.
patent: 5135314 (1992-08-01), Momose et al.
patent: 5228198 (1993-07-01), Paulman
patent: 5366137 (1994-11-01), Gysi et al.
Creamer Harvey B.
Panthofer William E.
Williams Mark J.
Butler Rodney A.
Hartman Domenica N. S.
Hartman Gary M.
Larson Lowell A.
Mill Masters, Inc.
LandOfFree
Ceramic tubemill roll assembly does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Ceramic tubemill roll assembly, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ceramic tubemill roll assembly will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1824716