Metal deforming – By use of tool acting during relative rotation between tool... – During rotation of work
Patent
1989-09-11
1991-03-26
Larson, Lowell A.
Metal deforming
By use of tool acting during relative rotation between tool...
During rotation of work
72100, B21B 1320
Patent
active
050019163
ABSTRACT:
Rolling tools are rotatably mounted in rotatably driven rolling heads such that they revolve in a planetary-like fashion while the rolling heads rotate. The rolling tools thus roll with blows or impacts upon the outer surface of the rotating workpiece which is advanced along its lengthwise axis. A diameter reduction of the workpiece occurs and the workpiece material is predominantly displaced in lengthwise direction. The workpiece is moved along its axis in the feed direction at an axial feed velocity of at least 3 millimeters for each workpiece revolution, and in the case of hollow workpieces preferably at least at 5 millimeters per workpiece revolution. Difficulties which otherwise arise for certain materials can thus be avoided, and also the production speed and quality can be increased. For hollow workpieces, undergoing internal profiling upon a mandrel, the workpiece which is advanced at high axial feed is preferably also cold rolled during its return feed or motion. The return feed should be at most equal to the magnitude of the forward feed but may be also around such order of magnitude.
REFERENCES:
patent: 1499534 (1924-07-01), Katzenmeyer
patent: 3422518 (1969-01-01), French
patent: 4646549 (1987-03-01), Saito et al.
Deriaz Daniel
Schuler Werner
Ernst GROB AG
Larson Lowell A.
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