Metal treatment – Process of modifying or maintaining internal physical... – Heating or cooling of solid metal
Patent
1996-09-04
1998-10-20
Echols, P. W.
Metal treatment
Process of modifying or maintaining internal physical...
Heating or cooling of solid metal
2989332, 72108, C21D 110, C21D 932
Patent
active
058241680
ABSTRACT:
According to the present invention, in a heating step, an outer circumferential portion of a workpiece having a disk shape is heated to high temperatures. In a hot rough-rolling step, the outer circumferential portion of the heated workpiece is formed by use of a roller die to generate a rolled-gear having teeth. In a warm finish-rolling step, the teeth of the rolled-gear are finish-rolled by use of the finishing roller die. The starting temperature T.sub.1 of the hot rough-rolling step is set in the range of from 850.degree. through 1100.degree. C., the terminating temperature of the hot rough-rolling step T.sub.2 is set in the range of from 500.degree. through 700.degree. C. The starting temperature T.sub.3 of the warm finish-rolling step is set in the range of from 400.degree. through 700.degree. C., and the terminating temperature of the warm finish-rolling step T.sub.4 is set in the range of from 200.degree. through 650.degree. C.
REFERENCES:
patent: 3273366 (1966-09-01), Schuman
patent: 3914083 (1975-10-01), Arai
patent: 4708912 (1987-11-01), Huppmann
patent: 5562785 (1996-10-01), Yamanaka
Database WPI, Week 9433, Oct. 5, 1994, Derwent Publications Ltd. AN 9427111333, SU-A-1 200 461, Jan. 30, 1994.
Database WPI, Week 9149, Jan. 29, 1992, Derwent Publications Ltd., AN 9136007549, SU-A-1 639 856, Apr. 7, 1991.
Database, WPI, Week 9426, Aug. 17, 1994, Derwent Publications Ltd., AN 9421591326, SU-A-1 810 196, Apr. 23, 1993.
Danno Atsushi
Fujiwara Yasuyuki
Miyamoto Noritaka
Onishi Masazumi
Sawamura Masatoshi
Echols P. W.
Toyota Jidosha & Kabushiki Kaisha
LandOfFree
Process for gear-rolling a high accuracy gear does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process for gear-rolling a high accuracy gear, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for gear-rolling a high accuracy gear will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-240772